/* util.c
*
* Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
* 2000, 2001, 2002, 2003, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* "Very useful, no doubt, that was to Saruman; yet it seems that he was
* not content." --Gandalf
*/
#include "EXTERN.h"
#define PERL_IN_UTIL_C
#include "perl.h"
#ifndef PERL_MICRO
#include <signal.h>
#ifndef SIG_ERR
# define SIG_ERR ((Sighandler_t) -1)
#endif
#endif
#ifdef I_SYS_WAIT
# include <sys/wait.h>
#endif
#ifdef HAS_SELECT
# ifdef I_SYS_SELECT
# include <sys/select.h>
# endif
#endif
#define FLUSH
#if defined(HAS_FCNTL) && defined(F_SETFD) && !defined(FD_CLOEXEC)
# define FD_CLOEXEC 1 /* NeXT needs this */
#endif
/* NOTE: Do not call the next three routines directly. Use the macros
* in handy.h, so that we can easily redefine everything to do tracking of
* allocated hunks back to the original New to track down any memory leaks.
* XXX This advice seems to be widely ignored :-( --AD August 1996.
*/
/* paranoid version of system's malloc() */
Malloc_t
Perl_safesysmalloc(MEM_SIZE size)
{
dTHX;
Malloc_t ptr;
#ifdef HAS_64K_LIMIT
if (size > 0xffff) {
PerlIO_printf(Perl_error_log,
"Allocation too large: %lx\n", size) FLUSH;
my_exit(1);
}
#endif /* HAS_64K_LIMIT */
#ifdef DEBUGGING
if ((long)size < 0)
Perl_croak_nocontext("panic: malloc");
#endif
ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
PERL_ALLOC_CHECK(ptr);
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
if (ptr != Nullch)
return ptr;
else if (PL_nomemok)
return Nullch;
else {
PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
/* paranoid version of system's realloc() */
Malloc_t
Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
{
dTHX;
Malloc_t ptr;
#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
Malloc_t PerlMem_realloc();
#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
#ifdef HAS_64K_LIMIT
if (size > 0xffff) {
PerlIO_printf(Perl_error_log,
"Reallocation too large: %lx\n", size) FLUSH;
my_exit(1);
}
#endif /* HAS_64K_LIMIT */
if (!size) {
safesysfree(where);
return NULL;
}
if (!where)
return safesysmalloc(size);
#ifdef DEBUGGING
if ((long)size < 0)
Perl_croak_nocontext("panic: realloc");
#endif
ptr = (Malloc_t)PerlMem_realloc(where,size);
PERL_ALLOC_CHECK(ptr);
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++));
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size));
if (ptr != Nullch)
return ptr;
else if (PL_nomemok)
return Nullch;
else {
PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
/* safe version of system's free() */
Free_t
Perl_safesysfree(Malloc_t where)
{
#ifdef PERL_IMPLICIT_SYS
dTHX;
#endif
DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++));
if (where) {
/*SUPPRESS 701*/
PerlMem_free(where);
}
}
/* safe version of system's calloc() */
Malloc_t
Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size)
{
dTHX;
Malloc_t ptr;
#ifdef HAS_64K_LIMIT
if (size * count > 0xffff) {
PerlIO_printf(Perl_error_log,
"Allocation too large: %lx\n", size * count) FLUSH;
my_exit(1);
}
#endif /* HAS_64K_LIMIT */
#ifdef DEBUGGING
if ((long)size < 0 || (long)count < 0)
Perl_croak_nocontext("panic: calloc");
#endif
size *= count;
ptr = (Malloc_t)PerlMem_malloc(size?size:1); /* malloc(0) is NASTY on our system */
PERL_ALLOC_CHECK(ptr);
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)size));
if (ptr != Nullch) {
memset((void*)ptr, 0, size);
return ptr;
}
else if (PL_nomemok)
return Nullch;
else {
PerlIO_puts(Perl_error_log,PL_no_mem) FLUSH;
my_exit(1);
return Nullch;
}
/*NOTREACHED*/
}
/* These must be defined when not using Perl's malloc for binary
* compatibility */
#ifndef MYMALLOC
Malloc_t Perl_malloc (MEM_SIZE nbytes)
{
dTHXs;
return (Malloc_t)PerlMem_malloc(nbytes);
}
Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
{
dTHXs;
return (Malloc_t)PerlMem_calloc(elements, size);
}
Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
{
dTHXs;
return (Malloc_t)PerlMem_realloc(where, nbytes);
}
Free_t Perl_mfree (Malloc_t where)
{
dTHXs;
PerlMem_free(where);
}
#endif
/* copy a string up to some (non-backslashed) delimiter, if any */
char *
Perl_delimcpy(pTHX_ register char *to, register char *toend, register char *from, register char *fromend, register int delim, I32 *retlen)
{
register I32 tolen;
for (tolen = 0; from < fromend; from++, tolen++) {
if (*from == '\\') {
if (from[1] == delim)
from++;
else {
if (to < toend)
*to++ = *from;
tolen++;
from++;
}
}
else if (*from == delim)
break;
if (to < toend)
*to++ = *from;
}
if (to < toend)
*to = '\0';
*retlen = tolen;
return from;
}
/* return ptr to little string in big string, NULL if not found */
/* This routine was donated by Corey Satten. */
char *
Perl_instr(pTHX_ register const char *big, register const char *little)
{
register const char *s, *x;
register I32 first;
if (!little)
return (char*)big;
first = *little++;
if (!first)
return (char*)big;
while (*big) {
if (*big++ != first)
continue;
for (x=big,s=little; *s; /**/ ) {
if (!*x)
return Nullch;
if (*s++ != *x++) {
s--;
break;
}
}
if (!*s)
return (char*)(big-1);
}
return Nullch;
}
/* same as instr but allow embedded nulls */
char *
Perl_ninstr(pTHX_ register const char *big, register const char *bigend, const char *little, const char *lend)
{
register const char *s, *x;
register I32 first = *little;
register const char *littleend = lend;
if (!first && little >= littleend)
return (char*)big;
if (bigend - big < littleend - little)
return Nullch;
bigend -= littleend - little++;
while (big <= bigend) {
if (*big++ != first)
continue;
for (x=big,s=little; s < littleend; /**/ ) {
if (*s++ != *x++) {
s--;
break;
}
}
if (s >= littleend)
return (char*)(big-1);
}
return Nullch;
}
/* reverse of the above--find last substring */
char *
Perl_rninstr(pTHX_ register const char *big, const char *bigend, const char *little, const char *lend)
{
register const char *bigbeg;
register const char *s, *x;
register I32 first = *little;
register const char *littleend = lend;
if (!first && little >= littleend)
return (char*)bigend;
bigbeg = big;
big = bigend - (littleend - little++);
while (big >= bigbeg) {
if (*big-- != first)
continue;
for (x=big+2,s=little; s < littleend; /**/ ) {
if (*s++ != *x++) {
s--;
break;
}
}
if (s >= littleend)
return (char*)(big+1);
}
return Nullch;
}
#define FBM_TABLE_OFFSET 2 /* Number of bytes between EOS and table*/
/* As a space optimization, we do not compile tables for strings of length
0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are
special-cased in fbm_instr().
If FBMcf_TAIL, the table is created as if the string has a trailing \n. */
/*
=head1 Miscellaneous Functions
=for apidoc fbm_compile
Analyses the string in order to make fast searches on it using fbm_instr()
-- the Boyer-Moore algorithm.
=cut
*/
void
Perl_fbm_compile(pTHX_ SV *sv, U32 flags)
{
register U8 *s;
register U8 *table;
register U32 i;
STRLEN len;
I32 rarest = 0;
U32 frequency = 256;
if (flags & FBMcf_TAIL) {
MAGIC *mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL;
sv_catpvn(sv, "\n", 1); /* Taken into account in fbm_instr() */
if (mg && mg->mg_len >= 0)
mg->mg_len++;
}
s = (U8*)SvPV_force(sv, len);
(void)SvUPGRADE(sv, SVt_PVBM);
if (len == 0) /* TAIL might be on a zero-length string. */
return;
if (len > 2) {
U8 mlen;
unsigned char *sb;
if (len > 255)
mlen = 255;
else
mlen = (U8)len;
Sv_Grow(sv, len + 256 + FBM_TABLE_OFFSET);
table = (unsigned char*)(SvPVX(sv) + len + FBM_TABLE_OFFSET);
s = table - 1 - FBM_TABLE_OFFSET; /* last char */
memset((void*)table, mlen, 256);
table[-1] = (U8)flags;
i = 0;
sb = s - mlen + 1; /* first char (maybe) */
while (s >= sb) {
if (table[*s] == mlen)
table[*s] = (U8)i;
s--, i++;
}
}
sv_magic(sv, Nullsv, PERL_MAGIC_bm, Nullch, 0); /* deep magic */
SvVALID_on(sv);
s = (unsigned char*)(SvPVX(sv)); /* deeper magic */
for (i = 0; i < len; i++) {
if (PL_freq[s[i]] < frequency) {
rarest = i;
frequency = PL_freq[s[i]];
}
}
BmRARE(sv) = s[rarest];
BmPREVIOUS(sv) = (U16)rarest;
BmUSEFUL(sv) = 100; /* Initial value */
if (flags & FBMcf_TAIL)
SvTAIL_on(sv);
DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %d\n",
BmRARE(sv),BmPREVIOUS(sv)));
}
/* If SvTAIL(littlestr), it has a fake '\n' at end. */
/* If SvTAIL is actually due to \Z or \z, this gives false positives
if multiline */
/*
=for apidoc fbm_instr
Returns the location of the SV in the string delimited by C<str> and
C<strend>. It returns C<Nullch> if the string can't be found. The C<sv>
does not have to be fbm_compiled, but the search will not be as fast
then.
=cut
*/
char *
Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *littlestr, U32 flags)
{
register unsigned char *s;
STRLEN l;
register unsigned char *little = (unsigned char *)SvPV(littlestr,l);
register STRLEN littlelen = l;
register I32 multiline = flags & FBMrf_MULTILINE;
if ((STRLEN)(bigend - big) < littlelen) {
if ( SvTAIL(littlestr)
&& ((STRLEN)(bigend - big) == littlelen - 1)
&& (littlelen == 1
|| (*big == *little &&
memEQ((char *)big, (char *)little, littlelen - 1))))
return (char*)big;
return Nullch;
}
if (littlelen <= 2) { /* Special-cased */
if (littlelen == 1) {
if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */
/* Know that bigend != big. */
if (bigend[-1] == '\n')
return (char *)(bigend - 1);
return (char *) bigend;
}
s = big;
while (s < bigend) {
if (*s == *little)
return (char *)s;
s++;
}
if (SvTAIL(littlestr))
return (char *) bigend;
return Nullch;
}
if (!littlelen)
return (char*)big; /* Cannot be SvTAIL! */
/* littlelen is 2 */
if (SvTAIL(littlestr) && !multiline) {
if (bigend[-1] == '\n' && bigend[-2] == *little)
return (char*)bigend - 2;
if (bigend[-1] == *little)
return (char*)bigend - 1;
return Nullch;
}
{
/* This should be better than FBM if c1 == c2, and almost
as good otherwise: maybe better since we do less indirection.
And we save a lot of memory by caching no table. */
register unsigned char c1 = little[0];
register unsigned char c2 = little[1];
s = big + 1;
bigend--;
if (c1 != c2) {
while (s <= bigend) {
if (s[0] == c2) {
if (s[-1] == c1)
return (char*)s - 1;
s += 2;
continue;
}
next_chars:
if (s[0] == c1) {
if (s == bigend)
goto check_1char_anchor;
if (s[1] == c2)
return (char*)s;
else {
s++;
goto next_chars;
}
}
else
s += 2;
}
goto check_1char_anchor;
}
/* Now c1 == c2 */
while (s <= bigend) {
if (s[0] == c1) {
if (s[-1] == c1)
return (char*)s - 1;
if (s == bigend)
goto check_1char_anchor;
if (s[1] == c1)
return (char*)s;
s += 3;
}
else
s += 2;
}
}
check_1char_anchor: /* One char and anchor! */
if (SvTAIL(littlestr) && (*bigend == *little))
return (char *)bigend; /* bigend is already decremented. */
return Nullch;
}
if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */
s = bigend - littlelen;
if (s >= big && bigend[-1] == '\n' && *s == *little
/* Automatically of length > 2 */
&& memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
{
return (char*)s; /* how sweet it is */
}
if (s[1] == *little
&& memEQ((char*)s + 2, (char*)little + 1, littlelen - 2))
{
return (char*)s + 1; /* how sweet it is */
}
return Nullch;
}
if (SvTYPE(littlestr) != SVt_PVBM || !SvVALID(littlestr)) {
char *b = ninstr((char*)big,(char*)bigend,
(char*)little, (char*)little + littlelen);
if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */
/* Chop \n from littlestr: */
s = bigend - littlelen + 1;
if (*s == *little
&& memEQ((char*)s + 1, (char*)little + 1, littlelen - 2))
{
return (char*)s;
}
return Nullch;
}
return b;
}
{ /* Do actual FBM. */
register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
register unsigned char *oldlittle;
if (littlelen > (STRLEN)(bigend - big))
return Nullch;
--littlelen; /* Last char found by table lookup */
s = big + littlelen;
little += littlelen; /* last char */
oldlittle = little;
if (s < bigend) {
register I32 tmp;
top2:
/*SUPPRESS 560*/
if ((tmp = table[*s])) {
if ((s += tmp) < bigend)
goto top2;
goto check_end;
}
else { /* less expensive than calling strncmp() */
register unsigned char *olds = s;
tmp = littlelen;
while (tmp--) {
if (*--s == *--little)
continue;
s = olds + 1; /* here we pay the price for failure */
little = oldlittle;
if (s < bigend) /* fake up continue to outer loop */
goto top2;
goto check_end;
}
return (char *)s;
}
}
check_end:
if ( s == bigend && (table[-1] & FBMcf_TAIL)
&& memEQ((char *)(bigend - littlelen),
(char *)(oldlittle - littlelen), littlelen) )
return (char*)bigend - littlelen;
return Nullch;
}
}
/* start_shift, end_shift are positive quantities which give offsets
of ends of some substring of bigstr.
If `last' we want the last occurrence.
old_posp is the way of communication between consequent calls if
the next call needs to find the .
The initial *old_posp should be -1.
Note that we take into account SvTAIL, so one can get extra
optimizations if _ALL flag is set.
*/
/* If SvTAIL is actually due to \Z or \z, this gives false positives
if PL_multiline. In fact if !PL_multiline the authoritative answer
is not supported yet. */
char *
Perl_screaminstr(pTHX_ SV *bigstr, SV *littlestr, I32 start_shift, I32 end_shift, I32 *old_posp, I32 last)
{
register unsigned char *s, *x;
register unsigned char *big;
register I32 pos;
register I32 previous;
register I32 first;
register unsigned char *little;
register I32 stop_pos;
register unsigned char *littleend;
I32 found = 0;
if (*old_posp == -1
? (pos = PL_screamfirst[BmRARE(littlestr)]) < 0
: (((pos = *old_posp), pos += PL_screamnext[pos]) == 0)) {
cant_find:
if ( BmRARE(littlestr) == '\n'
&& BmPREVIOUS(littlestr) == SvCUR(littlestr) - 1) {
little = (unsigned char *)(SvPVX(littlestr));
littleend = little + SvCUR(littlestr);
first = *little++;
goto check_tail;
}
return Nullch;
}
little = (unsigned char *)(SvPVX(littlestr));
littleend = little + SvCUR(littlestr);
first = *little++;
/* The value of pos we can start at: */
previous = BmPREVIOUS(littlestr);
big = (unsigned char *)(SvPVX(bigstr));
/* The value of pos we can stop at: */
stop_pos = SvCUR(bigstr) - end_shift - (SvCUR(littlestr) - 1 - previous);
if (previous + start_shift > stop_pos) {
/*
stop_pos does not include SvTAIL in the count, so this check is incorrect
(I think) - see [ID 20010618.006] and t/op/study.t. HVDS 2001/06/19
*/
#if 0
if (previous + start_shift == stop_pos + 1) /* A fake '\n'? */
goto check_tail;
#endif
return Nullch;
}
while (pos < previous + start_shift) {
if (!(pos += PL_screamnext[pos]))
goto cant_find;
}
big -= previous;
do {
if (pos >= stop_pos) break;
if (big[pos] != first)
continue;
for (x=big+pos+1,s=little; s < littleend; /**/ ) {
if (*s++ != *x++) {
s--;
break;
}
}
if (s == littleend) {
*old_posp = pos;
if (!last) return (char *)(big+pos);
found = 1;
}
} while ( pos += PL_screamnext[pos] );
if (last && found)
return (char *)(big+(*old_posp));
check_tail:
if (!SvTAIL(littlestr) || (end_shift > 0))
return Nullch;
/* Ignore the trailing "\n". This code is not microoptimized */
big = (unsigned char *)(SvPVX(bigstr) + SvCUR(bigstr));
stop_pos = littleend - little; /* Actual littlestr len */
if (stop_pos == 0)
return (char*)big;
big -= stop_pos;
if (*big == first
&& ((stop_pos == 1) ||
memEQ((char *)(big + 1), (char *)little, stop_pos - 1)))
return (char*)big;
return Nullch;
}
I32
Perl_ibcmp(pTHX_ const char *s1, const char *s2, register I32 len)
{
register U8 *a = (U8 *)s1;
register U8 *b = (U8 *)s2;
while (len--) {
if (*a != *b && *a != PL_fold[*b])
return 1;
a++,b++;
}
return 0;
}
I32
Perl_ibcmp_locale(pTHX_ const char *s1, const char *s2, register I32 len)
{
register U8 *a = (U8 *)s1;
register U8 *b = (U8 *)s2;
while (len--) {
if (*a != *b && *a != PL_fold_locale[*b])
return 1;
a++,b++;
}
return 0;
}
/* copy a string to a safe spot */
/*
=head1 Memory Management
=for apidoc savepv
Perl's version of C<strdup()>. Returns a pointer to a newly allocated
string which is a duplicate of C<pv>. The size of the string is
determined by C<strlen()>. The memory allocated for the new string can
be freed with the C<Safefree()> function.
=cut
*/
char *
Perl_savepv(pTHX_ const char *pv)
{
register char *newaddr = Nullch;
if (pv) {
New(902,newaddr,strlen(pv)+1,char);
(void)strcpy(newaddr,pv);
}
return newaddr;
}
/* same thing but with a known length */
/*
=for apidoc savepvn
Perl's version of what C<strndup()> would be if it existed. Returns a
pointer to a newly allocated string which is a duplicate of the first
C<len> bytes from C<pv>. The memory allocated for the new string can be
freed with the C<Safefree()> function.
=cut
*/
char *
Perl_savepvn(pTHX_ const char *pv, register I32 len)
{
register char *newaddr;
New(903,newaddr,len+1,char);
/* Give a meaning to NULL pointer mainly for the use in sv_magic() */
if (pv) {
Copy(pv,newaddr,len,char); /* might not be null terminated */
newaddr[len] = '\0'; /* is now */
}
else {
Zero(newaddr,len+1,char);
}
return newaddr;
}
/*
=for apidoc savesharedpv
A version of C<savepv()> which allocates the duplicate string in memory
which is shared between threads.
=cut
*/
char *
Perl_savesharedpv(pTHX_ const char *pv)
{
register char *newaddr = Nullch;
if (pv) {
newaddr = (char*)PerlMemShared_malloc(strlen(pv)+1);
(void)strcpy(newaddr,pv);
}
return newaddr;
}
/* the SV for Perl_form() and mess() is not kept in an arena */
STATIC SV *
S_mess_alloc(pTHX)
{
SV *sv;
XPVMG *any;
if (!PL_dirty)
return sv_2mortal(newSVpvn("",0));
if (PL_mess_sv)
return PL_mess_sv;
/* Create as PVMG now, to avoid any upgrading later */
New(905, sv, 1, SV);
Newz(905, any, 1, XPVMG);
SvFLAGS(sv) = SVt_PVMG;
SvANY(sv) = (void*)any;
SvREFCNT(sv) = 1 << 30; /* practically infinite */
PL_mess_sv = sv;
return sv;
}
#if defined(PERL_IMPLICIT_CONTEXT)
char *
Perl_form_nocontext(const char* pat, ...)
{
dTHX;
char *retval;
va_list args;
va_start(args, pat);
retval = vform(pat, &args);
va_end(args);
return retval;
}
#endif /* PERL_IMPLICIT_CONTEXT */
/*
=head1 Miscellaneous Functions
=for apidoc form
Takes a sprintf-style format pattern and conventional
(non-SV) arguments and returns the formatted string.
(char *) Perl_form(pTHX_ const char* pat, ...)
can be used any place a string (char *) is required:
char * s = Perl_form("%d.%d",major,minor);
Uses a single private buffer so if you want to format several strings you
must explicitly copy the earlier strings away (and free the copies when you
are done).
=cut
*/
char *
Perl_form(pTHX_ const char* pat, ...)
{
char *retval;
va_list args;
va_start(args, pat);
retval = vform(pat, &args);
va_end(args);
return retval;
}
char *
Perl_vform(pTHX_ const char *pat, va_list *args)
{
SV *sv = mess_alloc();
sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
return SvPVX(sv);
}
#if defined(PERL_IMPLICIT_CONTEXT)
SV *
Perl_mess_nocontext(const char *pat, ...)
{
dTHX;
SV *retval;
va_list args;
va_start(args, pat);
retval = vmess(pat, &args);
va_end(args);
return retval;
}
#endif /* PERL_IMPLICIT_CONTEXT */
SV *
Perl_mess(pTHX_ const char *pat, ...)
{
SV *retval;
va_list args;
va_start(args, pat);
retval = vmess(pat, &args);
va_end(args);
return retval;
}
STATIC COP*
S_closest_cop(pTHX_ COP *cop, OP *o)
{
/* Look for PL_op starting from o. cop is the last COP we've seen. */
if (!o || o == PL_op) return cop;
if (o->op_flags & OPf_KIDS) {
OP *kid;
for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
{
COP *new_cop;
/* If the OP_NEXTSTATE has been optimised away we can still use it
* the get the file and line number. */
if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE)
cop = (COP *)kid;
/* Keep searching, and return when we've found something. */
new_cop = closest_cop(cop, kid);
if (new_cop) return new_cop;
}
}
/* Nothing found. */
return 0;
}
SV *
Perl_vmess(pTHX_ const char *pat, va_list *args)
{
SV *sv = mess_alloc();
static char dgd[] = " during global destruction.\n";
COP *cop;
sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') {
/*
* Try and find the file and line for PL_op. This will usually be
* PL_curcop, but it might be a cop that has been optimised away. We
* can try to find such a cop by searching through the optree starting
* from the sibling of PL_curcop.
*/
cop = closest_cop(PL_curcop, PL_curcop->op_sibling);
if (!cop) cop = PL_curcop;
if (CopLINE(cop))
Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
OutCopFILE(cop), (IV)CopLINE(cop));
if (GvIO(PL_last_in_gv) && IoLINES(GvIOp(PL_last_in_gv))) {
bool line_mode = (RsSIMPLE(PL_rs) &&
SvCUR(PL_rs) == 1 && *SvPVX(PL_rs) == '\n');
Perl_sv_catpvf(aTHX_ sv, ", <%s> %s %"IVdf,
PL_last_in_gv == PL_argvgv ?
"" : GvNAME(PL_last_in_gv),
line_mode ? "line" : "chunk",
(IV)IoLINES(GvIOp(PL_last_in_gv)));
}
#ifdef USE_5005THREADS
if (thr->tid)
Perl_sv_catpvf(aTHX_ sv, " thread %ld", thr->tid);
#endif
sv_catpv(sv, PL_dirty ? dgd : ".\n");
}
return sv;
}
void
Perl_write_to_stderr(pTHX_ const char* message, int msglen)
{
IO *io;
MAGIC *mg;
if (PL_stderrgv && SvREFCNT(PL_stderrgv)
&& (io = GvIO(PL_stderrgv))
&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
{
dSP;
ENTER;
SAVETMPS;
save_re_context();
SAVESPTR(PL_stderrgv);
PL_stderrgv = Nullgv;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,2);
PUSHs(SvTIED_obj((SV*)io, mg));
PUSHs(sv_2mortal(newSVpvn(message, msglen)));
PUTBACK;
call_method("PRINT", G_SCALAR);
POPSTACK;
FREETMPS;
LEAVE;
}
else {
#ifdef USE_SFIO
/* SFIO can really mess with your errno */
int e = errno;
#endif
PerlIO *serr = Perl_error_log;
PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
(void)PerlIO_flush(serr);
#ifdef USE_SFIO
errno = e;
#endif
}
}
OP *
Perl_vdie(pTHX_ const char* pat, va_list *args)
{
char *message;
int was_in_eval = PL_in_eval;
HV *stash;
GV *gv;
CV *cv;
SV *msv;
STRLEN msglen;
I32 utf8 = 0;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p: die: curstack = %p, mainstack = %p\n",
thr, PL_curstack, PL_mainstack));
if (pat) {
msv = vmess(pat, args);
if (PL_errors && SvCUR(PL_errors)) {
sv_catsv(PL_errors, msv);
message = SvPV(PL_errors, msglen);
SvCUR_set(PL_errors, 0);
}
else
message = SvPV(msv,msglen);
utf8 = SvUTF8(msv);
}
else {
message = Nullch;
msglen = 0;
}
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p: die: message = %s\ndiehook = %p\n",
thr, message, PL_diehook));
if (PL_diehook) {
/* sv_2cv might call Perl_croak() */
SV *olddiehook = PL_diehook;
ENTER;
SAVESPTR(PL_diehook);
PL_diehook = Nullsv;
cv = sv_2cv(olddiehook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
save_re_context();
if (message) {
msg = newSVpvn(message, msglen);
SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
else {
msg = ERRSV;
}
PUSHSTACKi(PERLSI_DIEHOOK);
PUSHMARK(SP);
XPUSHs(msg);
PUTBACK;
call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
}
}
PL_restartop = die_where(message, msglen);
SvFLAGS(ERRSV) |= utf8;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"%p: die: restartop = %p, was_in_eval = %d, top_env = %p\n",
thr, PL_restartop, was_in_eval, PL_top_env));
if ((!PL_restartop && was_in_eval) || PL_top_env->je_prev)
JMPENV_JUMP(3);
return PL_restartop;
}
#if defined(PERL_IMPLICIT_CONTEXT)
OP *
Perl_die_nocontext(const char* pat, ...)
{
dTHX;
OP *o;
va_list args;
va_start(args, pat);
o = vdie(pat, &args);
va_end(args);
return o;
}
#endif /* PERL_IMPLICIT_CONTEXT */
OP *
Perl_die(pTHX_ const char* pat, ...)
{
OP *o;
va_list args;
va_start(args, pat);
o = vdie(pat, &args);
va_end(args);
return o;
}
void
Perl_vcroak(pTHX_ const char* pat, va_list *args)
{
char *message;
HV *stash;
GV *gv;
CV *cv;
SV *msv;
STRLEN msglen;
I32 utf8 = 0;
if (pat) {
msv = vmess(pat, args);
if (PL_errors && SvCUR(PL_errors)) {
sv_catsv(PL_errors, msv);
message = SvPV(PL_errors, msglen);
SvCUR_set(PL_errors, 0);
}
else
message = SvPV(msv,msglen);
utf8 = SvUTF8(msv);
}
else {
message = Nullch;
msglen = 0;
}
DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s",
PTR2UV(thr), message));
if (PL_diehook) {
/* sv_2cv might call Perl_croak() */
SV *olddiehook = PL_diehook;
ENTER;
SAVESPTR(PL_diehook);
PL_diehook = Nullsv;
cv = sv_2cv(olddiehook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
save_re_context();
if (message) {
msg = newSVpvn(message, msglen);
SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
}
else {
msg = ERRSV;
}
PUSHSTACKi(PERLSI_DIEHOOK);
PUSHMARK(SP);
XPUSHs(msg);
PUTBACK;
call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
}
}
if (PL_in_eval) {
PL_restartop = die_where(message, msglen);
SvFLAGS(ERRSV) |= utf8;
JMPENV_JUMP(3);
}
else if (!message)
message = SvPVx(ERRSV, msglen);
write_to_stderr(message, msglen);
my_failure_exit();
}
#if defined(PERL_IMPLICIT_CONTEXT)
void
Perl_croak_nocontext(const char *pat, ...)
{
dTHX;
va_list args;
va_start(args, pat);
vcroak(pat, &args);
/* NOTREACHED */
va_end(args);
}
#endif /* PERL_IMPLICIT_CONTEXT */
/*
=head1 Warning and Dieing
=for apidoc croak
This is the XSUB-writer's interface to Perl's C<die> function.
Normally use this function the same way you use the C C<printf>
function. See C<warn>.
If you want to throw an exception object, assign the object to
C<$@> and then pass C<Nullch> to croak():
errsv = get_sv("@", TRUE);
sv_setsv(errsv, exception_object);
croak(Nullch);
=cut
*/
void
Perl_croak(pTHX_ const char *pat, ...)
{
va_list args;
va_start(args, pat);
vcroak(pat, &args);
/* NOTREACHED */
va_end(args);
}
void
Perl_vwarn(pTHX_ const char* pat, va_list *args)
{
char *message;
HV *stash;
GV *gv;
CV *cv;
SV *msv;
STRLEN msglen;
I32 utf8 = 0;
msv = vmess(pat, args);
utf8 = SvUTF8(msv);
message = SvPV(msv, msglen);
if (PL_warnhook) {
/* sv_2cv might call Perl_warn() */
SV *oldwarnhook = PL_warnhook;
ENTER;
SAVESPTR(PL_warnhook);
PL_warnhook = Nullsv;
cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
save_re_context();
msg = newSVpvn(message, msglen);
SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
PUSHSTACKi(PERLSI_WARNHOOK);
PUSHMARK(SP);
XPUSHs(msg);
PUTBACK;
call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
return;
}
}
write_to_stderr(message, msglen);
}
#if defined(PERL_IMPLICIT_CONTEXT)
void
Perl_warn_nocontext(const char *pat, ...)
{
dTHX;
va_list args;
va_start(args, pat);
vwarn(pat, &args);
va_end(args);
}
#endif /* PERL_IMPLICIT_CONTEXT */
/*
=for apidoc warn
This is the XSUB-writer's interface to Perl's C<warn> function. Use this
function the same way you use the C C<printf> function. See
C<croak>.
=cut
*/
void
Perl_warn(pTHX_ const char *pat, ...)
{
va_list args;
va_start(args, pat);
vwarn(pat, &args);
va_end(args);
}
#if defined(PERL_IMPLICIT_CONTEXT)
void
Perl_warner_nocontext(U32 err, const char *pat, ...)
{
dTHX;
va_list args;
va_start(args, pat);
vwarner(err, pat, &args);
va_end(args);
}
#endif /* PERL_IMPLICIT_CONTEXT */
void
Perl_warner(pTHX_ U32 err, const char* pat,...)
{
va_list args;
va_start(args, pat);
vwarner(err, pat, &args);
va_end(args);
}
void
Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args)
{
char *message;
HV *stash;
GV *gv;
CV *cv;
SV *msv;
STRLEN msglen;
I32 utf8 = 0;
msv = vmess(pat, args);
message = SvPV(msv, msglen);
utf8 = SvUTF8(msv);
if (ckDEAD(err)) {
#ifdef USE_5005THREADS
DEBUG_S(PerlIO_printf(Perl_debug_log, "croak: 0x%"UVxf" %s", PTR2UV(thr), message));
#endif /* USE_5005THREADS */
if (PL_diehook) {
/* sv_2cv might call Perl_croak() */
SV *olddiehook = PL_diehook;
ENTER;
SAVESPTR(PL_diehook);
PL_diehook = Nullsv;
cv = sv_2cv(olddiehook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
save_re_context();
msg = newSVpvn(message, msglen);
SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
PUSHSTACKi(PERLSI_DIEHOOK);
PUSHMARK(sp);
XPUSHs(msg);
PUTBACK;
call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
}
}
if (PL_in_eval) {
PL_restartop = die_where(message, msglen);
SvFLAGS(ERRSV) |= utf8;
JMPENV_JUMP(3);
}
write_to_stderr(message, msglen);
my_failure_exit();
}
else {
if (PL_warnhook) {
/* sv_2cv might call Perl_warn() */
SV *oldwarnhook = PL_warnhook;
ENTER;
SAVESPTR(PL_warnhook);
PL_warnhook = Nullsv;
cv = sv_2cv(oldwarnhook, &stash, &gv, 0);
LEAVE;
if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) {
dSP;
SV *msg;
ENTER;
save_re_context();
msg = newSVpvn(message, msglen);
SvFLAGS(msg) |= utf8;
SvREADONLY_on(msg);
SAVEFREESV(msg);
PUSHSTACKi(PERLSI_WARNHOOK);
PUSHMARK(sp);
XPUSHs(msg);
PUTBACK;
call_sv((SV*)cv, G_DISCARD);
POPSTACK;
LEAVE;
return;
}
}
write_to_stderr(message, msglen);
}
}
/* since we've already done strlen() for both nam and val
* we can use that info to make things faster than
* sprintf(s, "%s=%s", nam, val)
*/
#define my_setenv_format(s, nam, nlen, val, vlen) \
Copy(nam, s, nlen, char); \
*(s+nlen) = '='; \
Copy(val, s+(nlen+1), vlen, char); \
*(s+(nlen+1+vlen)) = '\0'
#ifdef USE_ENVIRON_ARRAY
/* VMS' my_setenv() is in vms.c */
#if !defined(WIN32) && !defined(NETWARE)
void
Perl_my_setenv(pTHX_ char *nam, char *val)
{
#ifdef USE_ITHREADS
/* only parent thread can modify process environment */
if (PL_curinterp == aTHX)
#endif
{
#ifndef PERL_USE_SAFE_PUTENV
/* most putenv()s leak, so we manipulate environ directly */
register I32 i=setenv_getix(nam); /* where does it go? */
int nlen, vlen;
if (environ == PL_origenviron) { /* need we copy environment? */
I32 j;
I32 max;
char **tmpenv;
/*SUPPRESS 530*/
for (max = i; environ[max]; max++) ;
tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*));
for (j=0; j<max; j++) { /* copy environment */
int len = strlen(environ[j]);
tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char));
Copy(environ[j], tmpenv[j], len+1, char);
}
tmpenv[max] = Nullch;
environ = tmpenv; /* tell exec where it is now */
}
if (!val) {
safesysfree(environ[i]);
while (environ[i]) {
environ[i] = environ[i+1];
i++;
}
return;
}
if (!environ[i]) { /* does not exist yet */
environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*));
environ[i+1] = Nullch; /* make sure it's null terminated */
}
else
safesysfree(environ[i]);
nlen = strlen(nam);
vlen = strlen(val);
environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char));
/* all that work just for this */
my_setenv_format(environ[i], nam, nlen, val, vlen);
#else /* PERL_USE_SAFE_PUTENV */
# if defined(__CYGWIN__) || defined( EPOC)
setenv(nam, val, 1);
# else
char *new_env;
int nlen = strlen(nam), vlen;
if (!val) {
val = "";
}
vlen = strlen(val);
new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char));
/* all that work just for this */
my_setenv_format(new_env, nam, nlen, val, vlen);
(void)putenv(new_env);
# endif /* __CYGWIN__ */
#endif /* PERL_USE_SAFE_PUTENV */
}
}
#else /* WIN32 || NETWARE */
void
Perl_my_setenv(pTHX_ char *nam,char *val)
{
register char *envstr;
int nlen = strlen(nam), vlen;
if (!val) {
val = "";
}
vlen = strlen(val);
New(904, envstr, nlen+vlen+2, char);
my_setenv_format(envstr, nam, nlen, val, vlen);
(void)PerlEnv_putenv(envstr);
Safefree(envstr);
}
#endif /* WIN32 || NETWARE */
#ifndef PERL_MICRO
I32
Perl_setenv_getix(pTHX_ char *nam)
{
register I32 i, len = strlen(nam);
for (i = 0; environ[i]; i++) {
if (
#ifdef WIN32
strnicmp(environ[i],nam,len) == 0
#else
strnEQ(environ[i],nam,len)
#endif
&& environ[i][len] == '=')
break; /* strnEQ must come first to avoid */
} /* potential SEGV's */
return i;
}
#endif /* !PERL_MICRO */
#endif /* !VMS && !EPOC*/
#ifdef UNLINK_ALL_VERSIONS
I32
Perl_unlnk(pTHX_ char *f) /* unlink all versions of a file */
{
I32 i;
for (i = 0; PerlLIO_unlink(f) >= 0; i++) ;
return i ? 0 : -1;
}
#endif
/* this is a drop-in replacement for bcopy() */
#if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY))
char *
Perl_my_bcopy(register const char *from,register char *to,register I32 len)
{
char *retval = to;
if (from - to >= 0) {
while (len--)
*to++ = *from++;
}
else {
to += len;
from += len;
while (len--)
*(--to) = *(--from);
}
return retval;
}
#endif
/* this is a drop-in replacement for memset() */
#ifndef HAS_MEMSET
void *
Perl_my_memset(register char *loc, register I32 ch, register I32 len)
{
char *retval = loc;
while (len--)
*loc++ = ch;
return retval;
}
#endif
/* this is a drop-in replacement for bzero() */
#if !defined(HAS_BZERO) && !defined(HAS_MEMSET)
char *
Perl_my_bzero(register char *loc, register I32 len)
{
char *retval = loc;
while (len--)
*loc++ = 0;
return retval;
}
#endif
/* this is a drop-in replacement for memcmp() */
#if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP)
I32
Perl_my_memcmp(const char *s1, const char *s2, register I32 len)
{
register U8 *a = (U8 *)s1;
register U8 *b = (U8 *)s2;
register I32 tmp;
while (len--) {
if (tmp = *a++ - *b++)
return tmp;
}
return 0;
}
#endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */
#ifndef HAS_VPRINTF
#ifdef USE_CHAR_VSPRINTF
char *
#else
int
#endif
vsprintf(char *dest, const char *pat, char *args)
{
FILE fakebuf;
fakebuf._ptr = dest;
fakebuf._cnt = 32767;
#ifndef _IOSTRG
#define _IOSTRG 0
#endif
fakebuf._flag = _IOWRT|_IOSTRG;
_doprnt(pat, args, &fakebuf); /* what a kludge */
(void)putc('\0', &fakebuf);
#ifdef USE_CHAR_VSPRINTF
return(dest);
#else
return 0; /* perl doesn't use return value */
#endif
}
#endif /* HAS_VPRINTF */
#ifdef MYSWAP
#if BYTEORDER != 0x4321
short
Perl_my_swap(pTHX_ short s)
{
#if (BYTEORDER & 1) == 0
short result;
result = ((s & 255) << 8) + ((s >> 8) & 255);
return result;
#else
return s;
#endif
}
long
Perl_my_htonl(pTHX_ long l)
{
union {
long result;
char c[sizeof(long)];
} u;
#if BYTEORDER == 0x1234
u.c[0] = (l >> 24) & 255;
u.c[1] = (l >> 16) & 255;
u.c[2] = (l >> 8) & 255;
u.c[3] = l & 255;
return u.result;
#else
#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
Perl_croak(aTHX_ "Unknown BYTEORDER\n");
#else
register I32 o;
register I32 s;
for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
u.c[o & 0xf] = (l >> s) & 255;
}
return u.result;
#endif
#endif
}
long
Perl_my_ntohl(pTHX_ long l)
{
union {
long l;
char c[sizeof(long)];
} u;
#if BYTEORDER == 0x1234
u.c[0] = (l >> 24) & 255;
u.c[1] = (l >> 16) & 255;
u.c[2] = (l >> 8) & 255;
u.c[3] = l & 255;
return u.l;
#else
#if ((BYTEORDER - 0x1111) & 0x444) || !(BYTEORDER & 0xf)
Perl_croak(aTHX_ "Unknown BYTEORDER\n");
#else
register I32 o;
register I32 s;
u.l = l;
l = 0;
for (o = BYTEORDER - 0x1111, s = 0; s < (sizeof(long)*8); o >>= 4, s += 8) {
l |= (u.c[o & 0xf] & 255) << s;
}
return l;
#endif
#endif
}
#endif /* BYTEORDER != 0x4321 */
#endif /* MYSWAP */
/*
* Little-endian byte order functions - 'v' for 'VAX', or 'reVerse'.
* If these functions are defined,
* the BYTEORDER is neither 0x1234 nor 0x4321.
* However, this is not assumed.
* -DWS
*/
#define HTOV(name,type) \
type \
name (register type n) \
{ \
union { \
type value; \
char c[sizeof(type)]; \
} u; \
register I32 i; \
register I32 s; \
for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
u.c[i] = (n >> s) & 0xFF; \
} \
return u.value; \
}
#define VTOH(name,type) \
type \
name (register type n) \
{ \
union { \
type value; \
char c[sizeof(type)]; \
} u; \
register I32 i; \
register I32 s; \
u.value = n; \
n = 0; \
for (i = 0, s = 0; i < sizeof(u.c); i++, s += 8) { \
n += (u.c[i] & 0xFF) << s; \
} \
return n; \
}
#if defined(HAS_HTOVS) && !defined(htovs)
HTOV(htovs,short)
#endif
#if defined(HAS_HTOVL) && !defined(htovl)
HTOV(htovl,long)
#endif
#if defined(HAS_VTOHS) && !defined(vtohs)
VTOH(vtohs,short)
#endif
#if defined(HAS_VTOHL) && !defined(vtohl)
VTOH(vtohl,long)
#endif
PerlIO *
Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
{
#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) && !defined(NETWARE)
int p[2];
register I32 This, that;
register Pid_t pid;
SV *sv;
I32 did_pipes = 0;
int pp[2];
PERL_FLUSHALL_FOR_CHILD;
This = (*mode == 'w');
that = !This;
if (PL_tainting) {
taint_env();
taint_proper("Insecure %s%s", "EXEC");
}
if (PerlProc_pipe(p) < 0)
return Nullfp;
/* Try for another pipe pair for error return */
if (PerlProc_pipe(pp) >= 0)
did_pipes = 1;
while ((pid = PerlProc_fork()) < 0) {
if (errno != EAGAIN) {
PerlLIO_close(p[This]);
PerlLIO_close(p[that]);
if (did_pipes) {
PerlLIO_close(pp[0]);
PerlLIO_close(pp[1]);
}
return Nullfp;
}
sleep(5);
}
if (pid == 0) {
/* Child */
#undef THIS
#undef THAT
#define THIS that
#define THAT This
/* Close parent's end of error status pipe (if any) */
if (did_pipes) {
PerlLIO_close(pp[0]);
#if defined(HAS_FCNTL) && defined(F_SETFD)
/* Close error pipe automatically if exec works */
fcntl(pp[1], F_SETFD, FD_CLOEXEC);
#endif
}
/* Now dup our end of _the_ pipe to right position */
if (p[THIS] != (*mode == 'r')) {
PerlLIO_dup2(p[THIS], *mode == 'r');
PerlLIO_close(p[THIS]);
if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
}
else
PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */
#if !defined(HAS_FCNTL) || !defined(F_SETFD)
/* No automatic close - do it by hand */
# ifndef NOFILE
# define NOFILE 20
# endif
{
int fd;
for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) {
if (fd != pp[1])
PerlLIO_close(fd);
}
}
#endif
do_aexec5(Nullsv, args-1, args-1+n, pp[1], did_pipes);
PerlProc__exit(1);
#undef THIS
#undef THAT
}
/* Parent */
do_execfree(); /* free any memory malloced by child on fork */
if (did_pipes)
PerlLIO_close(pp[1]);
/* Keep the lower of the two fd numbers */
if (p[that] < p[This]) {
PerlLIO_dup2(p[This], p[that]);
PerlLIO_close(p[This]);
p[This] = p[that];
}
else
PerlLIO_close(p[that]); /* close child's end of pipe */
LOCK_FDPID_MUTEX;
sv = *av_fetch(PL_fdpid,p[This],TRUE);
UNLOCK_FDPID_MUTEX;
(void)SvUPGRADE(sv,SVt_IV);
SvIVX(sv) = pid;
PL_forkprocess = pid;
/* If we managed to get status pipe check for exec fail */
if (did_pipes && pid > 0) {
int errkid;
int n = 0, n1;
while (n < sizeof(int)) {
n1 = PerlLIO_read(pp[0],
(void*)(((char*)&errkid)+n),
(sizeof(int)) - n);
if (n1 <= 0)
break;
n += n1;
}
PerlLIO_close(pp[0]);
did_pipes = 0;
if (n) { /* Error */
int pid2, status;
PerlLIO_close(p[This]);
if (n != sizeof(int))
Perl_croak(aTHX_ "panic: kid popen errno read");
do {
pid2 = wait4pid(pid, &status, 0);
} while (pid2 == -1 && errno == EINTR);
errno = errkid; /* Propagate errno from kid */
return Nullfp;
}
}
if (did_pipes)
PerlLIO_close(pp[0]);
return PerlIO_fdopen(p[This], mode);
#else
Perl_croak(aTHX_ "List form of piped open not implemented");
return (PerlIO *) NULL;
#endif
}
/* VMS' my_popen() is in VMS.c, same with OS/2. */
#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
PerlIO *
Perl_my_popen(pTHX_ char *cmd, char *mode)
{
int p[2];
register I32 This, that;
register Pid_t pid;
SV *sv;
I32 doexec = strNE(cmd,"-");
I32 did_pipes = 0;
int pp[2];
PERL_FLUSHALL_FOR_CHILD;
#ifdef OS2
if (doexec) {
return my_syspopen(aTHX_ cmd,mode);
}
#endif
This = (*mode == 'w');
that = !This;
if (doexec && PL_tainting) {
taint_env();
taint_proper("Insecure %s%s", "EXEC");
}
if (PerlProc_pipe(p) < 0)
return Nullfp;
if (doexec && PerlProc_pipe(pp) >= 0)
did_pipes = 1;
while ((pid = PerlProc_fork()) < 0) {
if (errno != EAGAIN) {
PerlLIO_close(p[This]);
PerlLIO_close(p[that]);
if (did_pipes) {
PerlLIO_close(pp[0]);
PerlLIO_close(pp[1]);
}
if (!doexec)
Perl_croak(aTHX_ "Can't fork");
return Nullfp;
}
sleep(5);
}
if (pid == 0) {
GV* tmpgv;
#undef THIS
#undef THAT
#define THIS that
#define THAT This
if (did_pipes) {
PerlLIO_close(pp[0]);
#if defined(HAS_FCNTL) && defined(F_SETFD)
fcntl(pp[1], F_SETFD, FD_CLOEXEC);
#endif
}
if (p[THIS] != (*mode == 'r')) {
PerlLIO_dup2(p[THIS], *mode == 'r');
PerlLIO_close(p[THIS]);
if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */
PerlLIO_close(p[THAT]);
}
else
PerlLIO_close(p[THAT]);
#ifndef OS2
if (doexec) {
#if !defined(HAS_FCNTL) || !defined(F_SETFD)
int fd;
#ifndef NOFILE
#define NOFILE 20
#endif
{
int fd;
for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++)
if (fd != pp[1])
PerlLIO_close(fd);
}
#endif
/* may or may not use the shell */
do_exec3(cmd, pp[1], did_pipes);
PerlProc__exit(1);
}
#endif /* defined OS2 */
/*SUPPRESS 560*/
if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
SvREADONLY_off(GvSV(tmpgv));
sv_setiv(GvSV(tmpgv), PerlProc_getpid());
SvREADONLY_on(GvSV(tmpgv));
}
#ifdef THREADS_HAVE_PIDS
PL_ppid = (IV)getppid();
#endif
PL_forkprocess = 0;
hv_clear(PL_pidstatus); /* we have no children */
return Nullfp;
#undef THIS
#undef THAT
}
do_execfree(); /* free any memory malloced by child on vfork */
if (did_pipes)
PerlLIO_close(pp[1]);
if (p[that] < p[This]) {
PerlLIO_dup2(p[This], p[that]);
PerlLIO_close(p[This]);
p[This] = p[that];
}
else
PerlLIO_close(p[that]);
LOCK_FDPID_MUTEX;
sv = *av_fetch(PL_fdpid,p[This],TRUE);
UNLOCK_FDPID_MUTEX;
(void)SvUPGRADE(sv,SVt_IV);
SvIVX(sv) = pid;
PL_forkprocess = pid;
if (did_pipes && pid > 0) {
int errkid;
int n = 0, n1;
while (n < sizeof(int)) {
n1 = PerlLIO_read(pp[0],
(void*)(((char*)&errkid)+n),
(sizeof(int)) - n);
if (n1 <= 0)
break;
n += n1;
}
PerlLIO_close(pp[0]);
did_pipes = 0;
if (n) { /* Error */
int pid2, status;
PerlLIO_close(p[This]);
if (n != sizeof(int))
Perl_croak(aTHX_ "panic: kid popen errno read");
do {
pid2 = wait4pid(pid, &status, 0);
} while (pid2 == -1 && errno == EINTR);
errno = errkid; /* Propagate errno from kid */
return Nullfp;
}
}
if (did_pipes)
PerlLIO_close(pp[0]);
return PerlIO_fdopen(p[This], mode);
}
#else
#if defined(atarist) || defined(EPOC)
FILE *popen();
PerlIO *
Perl_my_popen(pTHX_ char *cmd, char *mode)
{
PERL_FLUSHALL_FOR_CHILD;
/* Call system's popen() to get a FILE *, then import it.
used 0 for 2nd parameter to PerlIO_importFILE;
apparently not used
*/
return PerlIO_importFILE(popen(cmd, mode), 0);
}
#else
#if defined(DJGPP)
FILE *djgpp_popen();
PerlIO *
Perl_my_popen(pTHX_ char *cmd, char *mode)
{
PERL_FLUSHALL_FOR_CHILD;
/* Call system's popen() to get a FILE *, then import it.
used 0 for 2nd parameter to PerlIO_importFILE;
apparently not used
*/
return PerlIO_importFILE(djgpp_popen(cmd, mode), 0);
}
#endif
#endif
#endif /* !DOSISH */
/* this is called in parent before the fork() */
void
Perl_atfork_lock(void)
{
#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
/* locks must be held in locking order (if any) */
# ifdef MYMALLOC
MUTEX_LOCK(&PL_malloc_mutex);
# endif
OP_REFCNT_LOCK;
#endif
}
/* this is called in both parent and child after the fork() */
void
Perl_atfork_unlock(void)
{
#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
/* locks must be released in same order as in atfork_lock() */
# ifdef MYMALLOC
MUTEX_UNLOCK(&PL_malloc_mutex);
# endif
OP_REFCNT_UNLOCK;
#endif
}
Pid_t
Perl_my_fork(void)
{
#if defined(HAS_FORK)
Pid_t pid;
#if (defined(USE_5005THREADS) || defined(USE_ITHREADS)) && !defined(HAS_PTHREAD_ATFORK)
atfork_lock();
pid = fork();
atfork_unlock();
#else
/* atfork_lock() and atfork_unlock() are installed as pthread_atfork()
* handlers elsewhere in the code */
pid = fork();
#endif
return pid;
#else
/* this "canna happen" since nothing should be calling here if !HAS_FORK */
Perl_croak_nocontext("fork() not available");
return 0;
#endif /* HAS_FORK */
}
#ifdef DUMP_FDS
void
Perl_dump_fds(pTHX_ char *s)
{
int fd;
Stat_t tmpstatbuf;
PerlIO_printf(Perl_debug_log,"%s", s);
for (fd = 0; fd < 32; fd++) {
if (PerlLIO_fstat(fd,&tmpstatbuf) >= 0)
PerlIO_printf(Perl_debug_log," %d",fd);
}
PerlIO_printf(Perl_debug_log,"\n");
}
#endif /* DUMP_FDS */
#ifndef HAS_DUP2
int
dup2(int oldfd, int newfd)
{
#if defined(HAS_FCNTL) && defined(F_DUPFD)
if (oldfd == newfd)
return oldfd;
PerlLIO_close(newfd);
return fcntl(oldfd, F_DUPFD, newfd);
#else
#define DUP2_MAX_FDS 256
int fdtmp[DUP2_MAX_FDS];
I32 fdx = 0;
int fd;
if (oldfd == newfd)
return oldfd;
PerlLIO_close(newfd);
/* good enough for low fd's... */
while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) {
if (fdx >= DUP2_MAX_FDS) {
PerlLIO_close(fd);
fd = -1;
break;
}
fdtmp[fdx++] = fd;
}
while (fdx > 0)
PerlLIO_close(fdtmp[--fdx]);
return fd;
#endif
}
#endif
#ifndef PERL_MICRO
#ifdef HAS_SIGACTION
#ifdef MACOS_TRADITIONAL
/* We don't want restart behavior on MacOS */
#undef SA_RESTART
#endif
Sighandler_t
Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
{
struct sigaction act, oact;
#ifdef USE_ITHREADS
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return SIG_ERR;
#endif
act.sa_handler = handler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
act.sa_flags |= SA_NOCLDWAIT;
#endif
if (sigaction(signo, &act, &oact) == -1)
return SIG_ERR;
else
return oact.sa_handler;
}
Sighandler_t
Perl_rsignal_state(pTHX_ int signo)
{
struct sigaction oact;
if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1)
return SIG_ERR;
else
return oact.sa_handler;
}
int
Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
{
struct sigaction act;
#ifdef USE_ITHREADS
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return -1;
#endif
act.sa_handler = handler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG)
act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
#if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */
if (signo == SIGCHLD && handler == (Sighandler_t)SIG_IGN)
act.sa_flags |= SA_NOCLDWAIT;
#endif
return sigaction(signo, &act, save);
}
int
Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
{
#ifdef USE_ITHREADS
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return -1;
#endif
return sigaction(signo, save, (struct sigaction *)NULL);
}
#else /* !HAS_SIGACTION */
Sighandler_t
Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
{
#if defined(USE_ITHREADS) && !defined(WIN32)
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return SIG_ERR;
#endif
return PerlProc_signal(signo, handler);
}
static int sig_trapped; /* XXX signals are process-wide anyway, so we
ignore the implications of this for threading */
static
Signal_t
sig_trap(int signo)
{
sig_trapped++;
}
Sighandler_t
Perl_rsignal_state(pTHX_ int signo)
{
Sighandler_t oldsig;
#if defined(USE_ITHREADS) && !defined(WIN32)
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return SIG_ERR;
#endif
sig_trapped = 0;
oldsig = PerlProc_signal(signo, sig_trap);
PerlProc_signal(signo, oldsig);
if (sig_trapped)
PerlProc_kill(PerlProc_getpid(), signo);
return oldsig;
}
int
Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
{
#if defined(USE_ITHREADS) && !defined(WIN32)
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return -1;
#endif
*save = PerlProc_signal(signo, handler);
return (*save == SIG_ERR) ? -1 : 0;
}
int
Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
{
#if defined(USE_ITHREADS) && !defined(WIN32)
/* only "parent" interpreter can diddle signals */
if (PL_curinterp != aTHX)
return -1;
#endif
return (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
}
#endif /* !HAS_SIGACTION */
#endif /* !PERL_MICRO */
/* VMS' my_pclose() is in VMS.c; same with OS/2 */
#if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__OPEN_VM) && !defined(EPOC) && !defined(MACOS_TRADITIONAL)
I32
Perl_my_pclose(pTHX_ PerlIO *ptr)
{
Sigsave_t hstat, istat, qstat;
int status;
SV **svp;
Pid_t pid;
Pid_t pid2;
bool close_failed;
int saved_errno = 0;
#ifdef VMS
int saved_vaxc_errno;
#endif
#ifdef WIN32
int saved_win32_errno;
#endif
LOCK_FDPID_MUTEX;
svp = av_fetch(PL_fdpid,PerlIO_fileno(ptr),TRUE);
UNLOCK_FDPID_MUTEX;
pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1;
SvREFCNT_dec(*svp);
*svp = &PL_sv_undef;
#ifdef OS2
if (pid == -1) { /* Opened by popen. */
return my_syspclose(ptr);
}
#endif
if ((close_failed = (PerlIO_close(ptr) == EOF))) {
saved_errno = errno;
#ifdef VMS
saved_vaxc_errno = vaxc$errno;
#endif
#ifdef WIN32
saved_win32_errno = GetLastError();
#endif
}
#ifdef UTS
if(PerlProc_kill(pid, 0) < 0) { return(pid); } /* HOM 12/23/91 */
#endif
#ifndef PERL_MICRO
rsignal_save(SIGHUP, SIG_IGN, &hstat);
rsignal_save(SIGINT, SIG_IGN, &istat);
rsignal_save(SIGQUIT, SIG_IGN, &qstat);
#endif
do {
pid2 = wait4pid(pid, &status, 0);
} while (pid2 == -1 && errno == EINTR);
#ifndef PERL_MICRO
rsignal_restore(SIGHUP, &hstat);
rsignal_restore(SIGINT, &istat);
rsignal_restore(SIGQUIT, &qstat);
#endif
if (close_failed) {
SETERRNO(saved_errno, saved_vaxc_errno);
return -1;
}
return(pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status));
}
#endif /* !DOSISH */
#if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(MACOS_TRADITIONAL)
I32
Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags)
{
I32 result;
if (!pid)
return -1;
#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
{
SV *sv;
SV** svp;
char spid[TYPE_CHARS(int)];
if (pid > 0) {
sprintf(spid, "%"IVdf, (IV)pid);
svp = hv_fetch(PL_pidstatus,spid,strlen(spid),FALSE);
if (svp && *svp != &PL_sv_undef) {
*statusp = SvIVX(*svp);
(void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
return pid;
}
}
else {
HE *entry;
hv_iterinit(PL_pidstatus);
if ((entry = hv_iternext(PL_pidstatus))) {
SV *sv;
char spid[TYPE_CHARS(int)];
pid = atoi(hv_iterkey(entry,(I32*)statusp));
sv = hv_iterval(PL_pidstatus,entry);
*statusp = SvIVX(sv);
sprintf(spid, "%"IVdf, (IV)pid);
(void)hv_delete(PL_pidstatus,spid,strlen(spid),G_DISCARD);
return pid;
}
}
}
#endif
#ifdef HAS_WAITPID
# ifdef HAS_WAITPID_RUNTIME
if (!HAS_WAITPID_RUNTIME)
goto hard_way;
# endif
result = PerlProc_waitpid(pid,statusp,flags);
goto finish;
#endif
#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
result = wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
goto finish;
#endif
#if !defined(HAS_WAITPID) && !defined(HAS_WAIT4) || defined(HAS_WAITPID_RUNTIME)
hard_way:
{
if (flags)
Perl_croak(aTHX_ "Can't do waitpid with flags");
else {
while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0)
pidgone(result,*statusp);
if (result < 0)
*statusp = -1;
}
}
#endif
finish:
if (result < 0 && errno == EINTR) {
PERL_ASYNC_CHECK();
}
return result;
}
#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
void
/*SUPPRESS 590*/
Perl_pidgone(pTHX_ Pid_t pid, int status)
{
register SV *sv;
char spid[TYPE_CHARS(int)];
sprintf(spid, "%"IVdf, (IV)pid);
sv = *hv_fetch(PL_pidstatus,spid,strlen(spid),TRUE);
(void)SvUPGRADE(sv,SVt_IV);
SvIVX(sv) = status;
return;
}
#if defined(atarist) || defined(OS2) || defined(EPOC)
int pclose();
#ifdef HAS_FORK
int /* Cannot prototype with I32
in os2ish.h. */
my_syspclose(PerlIO *ptr)
#else
I32
Perl_my_pclose(pTHX_ PerlIO *ptr)
#endif
{
/* Needs work for PerlIO ! */
FILE *f = PerlIO_findFILE(ptr);
I32 result = pclose(f);
PerlIO_releaseFILE(ptr,f);
return result;
}
#endif
#if defined(DJGPP)
int djgpp_pclose();
I32
Perl_my_pclose(pTHX_ PerlIO *ptr)
{
/* Needs work for PerlIO ! */
FILE *f = PerlIO_findFILE(ptr);
I32 result = djgpp_pclose(f);
result = (result << 8) & 0xff00;
PerlIO_releaseFILE(ptr,f);
return result;
}
#endif
void
Perl_repeatcpy(pTHX_ register char *to, register const char *from, I32 len, register I32 count)
{
register I32 todo;
register const char *frombase = from;
if (len == 1) {
register const char c = *from;
while (count-- > 0)
*to++ = c;
return;
}
while (count-- > 0) {
for (todo = len; todo > 0; todo--) {
*to++ = *from++;
}
from = frombase;
}
}
#ifndef HAS_RENAME
I32
Perl_same_dirent(pTHX_ char *a, char *b)
{
char *fa = strrchr(a,'/');
char *fb = strrchr(b,'/');
Stat_t tmpstatbuf1;
Stat_t tmpstatbuf2;
SV *tmpsv = sv_newmortal();
if (fa)
fa++;
else
fa = a;
if (fb)
fb++;
else
fb = b;
if (strNE(a,b))
return FALSE;
if (fa == a)
sv_setpv(tmpsv, ".");
else
sv_setpvn(tmpsv, a, fa - a);
if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf1) < 0)
return FALSE;
if (fb == b)
sv_setpv(tmpsv, ".");
else
sv_setpvn(tmpsv, b, fb - b);
if (PerlLIO_stat(SvPVX(tmpsv), &tmpstatbuf2) < 0)
return FALSE;
return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev &&
tmpstatbuf1.st_ino == tmpstatbuf2.st_ino;
}
#endif /* !HAS_RENAME */
char*
Perl_find_script(pTHX_ char *scriptname, bool dosearch, char **search_ext, I32 flags)
{
char *xfound = Nullch;
char *xfailed = Nullch;
char tmpbuf[MAXPATHLEN];
register char *s;
I32 len = 0;
int retval;
#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
# define SEARCH_EXTS ".bat", ".cmd", NULL
# define MAX_EXT_LEN 4
#endif
#ifdef OS2
# define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
# define MAX_EXT_LEN 4
#endif
#ifdef VMS
# define SEARCH_EXTS ".pl", ".com", NULL
# define MAX_EXT_LEN 4
#endif
/* additional extensions to try in each dir if scriptname not found */
#ifdef SEARCH_EXTS
char *exts[] = { SEARCH_EXTS };
char **ext = search_ext ? search_ext : exts;
int extidx = 0, i = 0;
char *curext = Nullch;
#else
# define MAX_EXT_LEN 0
#endif
/*
* If dosearch is true and if scriptname does not contain path
* delimiters, search the PATH for scriptname.
*
* If SEARCH_EXTS is also defined, will look for each
* scriptname{SEARCH_EXTS} whenever scriptname is not found
* while searching the PATH.
*
* Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
* proceeds as follows:
* If DOSISH or VMSISH:
* + look for ./scriptname{,.foo,.bar}
* + search the PATH for scriptname{,.foo,.bar}
*
* If !DOSISH:
* + look *only* in the PATH for scriptname{,.foo,.bar} (note
* this will not look in '.' if it's not in the PATH)
*/
tmpbuf[0] = '\0';
#ifdef VMS
# ifdef ALWAYS_DEFTYPES
len = strlen(scriptname);
if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
int hasdir, idx = 0, deftypes = 1;
bool seen_dot = 1;
hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
# else
if (dosearch) {
int hasdir, idx = 0, deftypes = 1;
bool seen_dot = 1;
hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
# endif
/* The first time through, just add SEARCH_EXTS to whatever we
* already have, so we can check for default file types. */
while (deftypes ||
(!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) )
{
if (deftypes) {
deftypes = 0;
*tmpbuf = '\0';
}
if ((strlen(tmpbuf) + strlen(scriptname)
+ MAX_EXT_LEN) >= sizeof tmpbuf)
continue; /* don't search dir with too-long name */
strcat(tmpbuf, scriptname);
#else /* !VMS */
#ifdef DOSISH
if (strEQ(scriptname, "-"))
dosearch = 0;
if (dosearch) { /* Look in '.' first. */
char *cur = scriptname;
#ifdef SEARCH_EXTS
if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
while (ext[i])
if (strEQ(ext[i++],curext)) {
extidx = -1; /* already has an ext */
break;
}
do {
#endif
DEBUG_p(PerlIO_printf(Perl_debug_log,
"Looking for %s\n",cur));
if (PerlLIO_stat(cur,&PL_statbuf) >= 0
&& !S_ISDIR(PL_statbuf.st_mode)) {
dosearch = 0;
scriptname = cur;
#ifdef SEARCH_EXTS
break;
#endif
}
#ifdef SEARCH_EXTS
if (cur == scriptname) {
len = strlen(scriptname);
if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf))
break;
cur = strcpy(tmpbuf, scriptname);
}
} while (extidx >= 0 && ext[extidx] /* try an extension? */
&& strcpy(tmpbuf+len, ext[extidx++]));
#endif
}
#endif
#ifdef MACOS_TRADITIONAL
if (dosearch && !strchr(scriptname, ':') &&
(s = PerlEnv_getenv("Commands")))
#else
if (dosearch && !strchr(scriptname, '/')
#ifdef DOSISH
&& !strchr(scriptname, '\\')
#endif
&& (s = PerlEnv_getenv("PATH")))
#endif
{
bool seen_dot = 0;
PL_bufend = s + strlen(s);
while (s < PL_bufend) {
#ifdef MACOS_TRADITIONAL
s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
',',
&len);
#else
#if defined(atarist) || defined(DOSISH)
for (len = 0; *s
# ifdef atarist
&& *s != ','
# endif
&& *s != ';'; len++, s++) {
if (len < sizeof tmpbuf)
tmpbuf[len] = *s;
}
if (len < sizeof tmpbuf)
tmpbuf[len] = '\0';
#else /* ! (atarist || DOSISH) */
s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, PL_bufend,
':',
&len);
#endif /* ! (atarist || DOSISH) */
#endif /* MACOS_TRADITIONAL */
if (s < PL_bufend)
s++;
if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf)
continue; /* don't search dir with too-long name */
#ifdef MACOS_TRADITIONAL
if (len && tmpbuf[len - 1] != ':')
tmpbuf[len++] = ':';
#else
if (len
#if defined(atarist) || defined(__MINT__) || defined(DOSISH)
&& tmpbuf[len - 1] != '/'
&& tmpbuf[len - 1] != '\\'
#endif
)
tmpbuf[len++] = '/';
if (len == 2 && tmpbuf[0] == '.')
seen_dot = 1;
#endif
(void)strcpy(tmpbuf + len, scriptname);
#endif /* !VMS */
#ifdef SEARCH_EXTS
len = strlen(tmpbuf);
if (extidx > 0) /* reset after previous loop */
extidx = 0;
do {
#endif
DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf));
retval = PerlLIO_stat(tmpbuf,&PL_statbuf);
if (S_ISDIR(PL_statbuf.st_mode)) {
retval = -1;
}
#ifdef SEARCH_EXTS
} while ( retval < 0 /* not there */
&& extidx>=0 && ext[extidx] /* try an extension? */
&& strcpy(tmpbuf+len, ext[extidx++])
);
#endif
if (retval < 0)
continue;
if (S_ISREG(PL_statbuf.st_mode)
&& cando(S_IRUSR,TRUE,&PL_statbuf)
#if !defined(DOSISH) && !defined(MACOS_TRADITIONAL)
&& cando(S_IXUSR,TRUE,&PL_statbuf)
#endif
)
{
xfound = tmpbuf; /* bingo! */
break;
}
if (!xfailed)
xfailed = savepv(tmpbuf);
}
#ifndef DOSISH
if (!xfound && !seen_dot && !xfailed &&
(PerlLIO_stat(scriptname,&PL_statbuf) < 0
|| S_ISDIR(PL_statbuf.st_mode)))
#endif
seen_dot = 1; /* Disable message. */
if (!xfound) {
if (flags & 1) { /* do or die? */
Perl_croak(aTHX_ "Can't %s %s%s%s",
(xfailed ? "execute" : "find"),
(xfailed ? xfailed : scriptname),
(xfailed ? "" : " on PATH"),
(xfailed || seen_dot) ? "" : ", '.' not in PATH");
}
scriptname = Nullch;
}
if (xfailed)
Safefree(xfailed);
scriptname = xfound;
}
return (scriptname ? savepv(scriptname) : Nullch);
}
#ifndef PERL_GET_CONTEXT_DEFINED
void *
Perl_get_context(void)
{
#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
# ifdef OLD_PTHREADS_API
pthread_addr_t t;
if (pthread_getspecific(PL_thr_key, &t))
Perl_croak_nocontext("panic: pthread_getspecific");
return (void*)t;
# else
# ifdef I_MACH_CTHREADS
return (void*)cthread_data(cthread_self());
# else
return (void*)PTHREAD_GETSPECIFIC(PL_thr_key);
# endif
# endif
#else
return (void*)NULL;
#endif
}
void
Perl_set_context(void *t)
{
#if defined(USE_5005THREADS) || defined(USE_ITHREADS)
# ifdef I_MACH_CTHREADS
cthread_set_data(cthread_self(), t);
# else
if (pthread_setspecific(PL_thr_key, t))
Perl_croak_nocontext("panic: pthread_setspecific");
# endif
#endif
}
#endif /* !PERL_GET_CONTEXT_DEFINED */
#ifdef USE_5005THREADS
#ifdef FAKE_THREADS
/* Very simplistic scheduler for now */
void
schedule(void)
{
thr = thr->i.next_run;
}
void
Perl_cond_init(pTHX_ perl_cond *cp)
{
*cp = 0;
}
void
Perl_cond_signal(pTHX_ perl_cond *cp)
{
perl_os_thread t;
perl_cond cond = *cp;
if (!cond)
return;
t = cond->thread;
/* Insert t in the runnable queue just ahead of us */
t->i.next_run = thr->i.next_run;
thr->i.next_run->i.prev_run = t;
t->i.prev_run = thr;
thr->i.next_run = t;
thr->i.wait_queue = 0;
/* Remove from the wait queue */
*cp = cond->next;
Safefree(cond);
}
void
Perl_cond_broadcast(pTHX_ perl_cond *cp)
{
perl_os_thread t;
perl_cond cond, cond_next;
for (cond = *cp; cond; cond = cond_next) {
t = cond->thread;
/* Insert t in the runnable queue just ahead of us */
t->i.next_run = thr->i.next_run;
thr->i.next_run->i.prev_run = t;
t->i.prev_run = thr;
thr->i.next_run = t;
thr->i.wait_queue = 0;
/* Remove from the wait queue */
cond_next = cond->next;
Safefree(cond);
}
*cp = 0;
}
void
Perl_cond_wait(pTHX_ perl_cond *cp)
{
perl_cond cond;
if (thr->i.next_run == thr)
Perl_croak(aTHX_ "panic: perl_cond_wait called by last runnable thread");
New(666, cond, 1, struct perl_wait_queue);
cond->thread = thr;
cond->next = *cp;
*cp = cond;
thr->i.wait_queue = cond;
/* Remove ourselves from runnable queue */
thr->i.next_run->i.prev_run = thr->i.prev_run;
thr->i.prev_run->i.next_run = thr->i.next_run;
}
#endif /* FAKE_THREADS */
MAGIC *
Perl_condpair_magic(pTHX_ SV *sv)
{
MAGIC *mg;
(void)SvUPGRADE(sv, SVt_PVMG);
mg = mg_find(sv, PERL_MAGIC_mutex);
if (!mg) {
condpair_t *cp;
New(53, cp, 1, condpair_t);
MUTEX_INIT(&cp->mutex);
COND_INIT(&cp->owner_cond);
COND_INIT(&cp->cond);
cp->owner = 0;
LOCK_CRED_MUTEX; /* XXX need separate mutex? */
mg = mg_find(sv, PERL_MAGIC_mutex);
if (mg) {
/* someone else beat us to initialising it */
UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
MUTEX_DESTROY(&cp->mutex);
COND_DESTROY(&cp->owner_cond);
COND_DESTROY(&cp->cond);
Safefree(cp);
}
else {
sv_magic(sv, Nullsv, PERL_MAGIC_mutex, 0, 0);
mg = SvMAGIC(sv);
mg->mg_ptr = (char *)cp;
mg->mg_len = sizeof(cp);
UNLOCK_CRED_MUTEX; /* XXX need separate mutex? */
DEBUG_S(WITH_THR(PerlIO_printf(Perl_debug_log,
"%p: condpair_magic %p\n", thr, sv)));
}
}
return mg;
}
SV *
Perl_sv_lock(pTHX_ SV *osv)
{
MAGIC *mg;
SV *sv = osv;
LOCK_SV_LOCK_MUTEX;
if (SvROK(sv)) {
sv = SvRV(sv);
}
mg = condpair_magic(sv);
MUTEX_LOCK(MgMUTEXP(mg));
if (MgOWNER(mg) == thr)
MUTEX_UNLOCK(MgMUTEXP(mg));
else {
while (MgOWNER(mg))
COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
MgOWNER(mg) = thr;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"0x%"UVxf": Perl_lock lock 0x%"UVxf"\n",
PTR2UV(thr), PTR2UV(sv)));
MUTEX_UNLOCK(MgMUTEXP(mg));
SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
}
UNLOCK_SV_LOCK_MUTEX;
return sv;
}
/*
* Make a new perl thread structure using t as a prototype. Some of the
* fields for the new thread are copied from the prototype thread, t,
* so t should not be running in perl at the time this function is
* called. The use by ext/Thread/Thread.xs in core perl (where t is the
* thread calling new_struct_thread) clearly satisfies this constraint.
*/
struct perl_thread *
Perl_new_struct_thread(pTHX_ struct perl_thread *t)
{
#if !defined(PERL_IMPLICIT_CONTEXT)
struct perl_thread *thr;
#endif
SV *sv;
SV **svp;
I32 i;
sv = newSVpvn("", 0);
SvGROW(sv, sizeof(struct perl_thread) + 1);
SvCUR_set(sv, sizeof(struct perl_thread));
thr = (Thread) SvPVX(sv);
#ifdef DEBUGGING
Poison(thr, 1, struct perl_thread);
PL_markstack = 0;
PL_scopestack = 0;
PL_savestack = 0;
PL_retstack = 0;
PL_dirty = 0;
PL_localizing = 0;
Zero(&PL_hv_fetch_ent_mh, 1, HE);
PL_efloatbuf = (char*)NULL;
PL_efloatsize = 0;
#else
Zero(thr, 1, struct perl_thread);
#endif
thr->oursv = sv;
init_stacks();
PL_curcop = &PL_compiling;
thr->interp = t->interp;
thr->cvcache = newHV();
thr->threadsv = newAV();
thr->specific = newAV();
thr->errsv = newSVpvn("", 0);
thr->flags = THRf_R_JOINABLE;
thr->thr_done = 0;
MUTEX_INIT(&thr->mutex);
JMPENV_BOOTSTRAP;
PL_in_eval = EVAL_NULL; /* ~(EVAL_INEVAL|EVAL_WARNONLY|EVAL_KEEPERR|EVAL_INREQUIRE) */
PL_restartop = 0;
PL_statname = NEWSV(66,0);
PL_errors = newSVpvn("", 0);
PL_maxscream = -1;
PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp);
PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags);
PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start);
PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string);
PL_regfree = MEMBER_TO_FPTR(Perl_pregfree);
PL_regindent = 0;
PL_reginterp_cnt = 0;
PL_lastscream = Nullsv;
PL_screamfirst = 0;
PL_screamnext = 0;
PL_reg_start_tmp = 0;
PL_reg_start_tmpl = 0;
PL_reg_poscache = Nullch;
PL_peepp = MEMBER_TO_FPTR(Perl_peep);
/* parent thread's data needs to be locked while we make copy */
MUTEX_LOCK(&t->mutex);
#ifdef PERL_FLEXIBLE_EXCEPTIONS
PL_protect = t->Tprotect;
#endif
PL_curcop = t->Tcurcop; /* XXX As good a guess as any? */
PL_defstash = t->Tdefstash; /* XXX maybe these should */
PL_curstash = t->Tcurstash; /* always be set to main? */
PL_tainted = t->Ttainted;
PL_curpm = t->Tcurpm; /* XXX No PMOP ref count */
PL_rs = newSVsv(t->Trs);
PL_last_in_gv = Nullgv;
PL_ofs_sv = t->Tofs_sv ? SvREFCNT_inc(PL_ofs_sv) : Nullsv;
PL_defoutgv = (GV*)SvREFCNT_inc(t->Tdefoutgv);
PL_chopset = t->Tchopset;
PL_bodytarget = newSVsv(t->Tbodytarget);
PL_toptarget = newSVsv(t->Ttoptarget);
if (t->Tformtarget == t->Ttoptarget)
PL_formtarget = PL_toptarget;
else
PL_formtarget = PL_bodytarget;
PL_watchaddr = 0; /* XXX */
PL_watchok = 0; /* XXX */
PL_comppad = 0;
PL_curpad = 0;
/* Initialise all per-thread SVs that the template thread used */
svp = AvARRAY(t->threadsv);
for (i = 0; i <= AvFILLp(t->threadsv); i++, svp++) {
if (*svp && *svp != &PL_sv_undef) {
SV *sv = newSVsv(*svp);
av_store(thr->threadsv, i, sv);
sv_magic(sv, 0, PERL_MAGIC_sv, &PL_threadsv_names[i], 1);
DEBUG_S(PerlIO_printf(Perl_debug_log,
"new_struct_thread: copied threadsv %"IVdf" %p->%p\n",
(IV)i, t, thr));
}
}
thr->threadsvp = AvARRAY(thr->threadsv);
MUTEX_LOCK(&PL_threads_mutex);
PL_nthreads++;
thr->tid = ++PL_threadnum;
thr->next = t->next;
thr->prev = t;
t->next = thr;
thr->next->prev = thr;
MUTEX_UNLOCK(&PL_threads_mutex);
/* done copying parent's state */
MUTEX_UNLOCK(&t->mutex);
#ifdef HAVE_THREAD_INTERN
Perl_init_thread_intern(thr);
#endif /* HAVE_THREAD_INTERN */
return thr;
}
#endif /* USE_5005THREADS */
#ifdef PERL_GLOBAL_STRUCT
struct perl_vars *
Perl_GetVars(pTHX)
{
return &PL_Vars;
}
#endif
char **
Perl_get_op_names(pTHX)
{
return PL_op_name;
}
char **
Perl_get_op_descs(pTHX)
{
return PL_op_desc;
}
char *
Perl_get_no_modify(pTHX)
{
return (char*)PL_no_modify;
}
U32 *
Perl_get_opargs(pTHX)
{
return PL_opargs;
}
PPADDR_t*
Perl_get_ppaddr(pTHX)
{
return (PPADDR_t*)PL_ppaddr;
}
#ifndef HAS_GETENV_LEN
char *
Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len)
{
char *env_trans = PerlEnv_getenv(env_elem);
if (env_trans)
*len = strlen(env_trans);
return env_trans;
}
#endif
MGVTBL*
Perl_get_vtbl(pTHX_ int vtbl_id)
{
MGVTBL* result = Null(MGVTBL*);
switch(vtbl_id) {
case want_vtbl_sv:
result = &PL_vtbl_sv;
break;
case want_vtbl_env:
result = &PL_vtbl_env;
break;
case want_vtbl_envelem:
result = &PL_vtbl_envelem;
break;
case want_vtbl_sig:
result = &PL_vtbl_sig;
break;
case want_vtbl_sigelem:
result = &PL_vtbl_sigelem;
break;
case want_vtbl_pack:
result = &PL_vtbl_pack;
break;
case want_vtbl_packelem:
result = &PL_vtbl_packelem;
break;
case want_vtbl_dbline:
result = &PL_vtbl_dbline;
break;
case want_vtbl_isa:
result = &PL_vtbl_isa;
break;
case want_vtbl_isaelem:
result = &PL_vtbl_isaelem;
break;
case want_vtbl_arylen:
result = &PL_vtbl_arylen;
break;
case want_vtbl_glob:
result = &PL_vtbl_glob;
break;
case want_vtbl_mglob:
result = &PL_vtbl_mglob;
break;
case want_vtbl_nkeys:
result = &PL_vtbl_nkeys;
break;
case want_vtbl_taint:
result = &PL_vtbl_taint;
break;
case want_vtbl_substr:
result = &PL_vtbl_substr;
break;
case want_vtbl_vec:
result = &PL_vtbl_vec;
break;
case want_vtbl_pos:
result = &PL_vtbl_pos;
break;
case want_vtbl_bm:
result = &PL_vtbl_bm;
break;
case want_vtbl_fm:
result = &PL_vtbl_fm;
break;
case want_vtbl_uvar:
result = &PL_vtbl_uvar;
break;
#ifdef USE_5005THREADS
case want_vtbl_mutex:
result = &PL_vtbl_mutex;
break;
#endif
case want_vtbl_defelem:
result = &PL_vtbl_defelem;
break;
case want_vtbl_regexp:
result = &PL_vtbl_regexp;
break;
case want_vtbl_regdata:
result = &PL_vtbl_regdata;
break;
case want_vtbl_regdatum:
result = &PL_vtbl_regdatum;
break;
#ifdef USE_LOCALE_COLLATE
case want_vtbl_collxfrm:
result = &PL_vtbl_collxfrm;
break;
#endif
case want_vtbl_amagic:
result = &PL_vtbl_amagic;
break;
case want_vtbl_amagicelem:
result = &PL_vtbl_amagicelem;
break;
case want_vtbl_backref:
result = &PL_vtbl_backref;
break;
case want_vtbl_utf8:
result = &PL_vtbl_utf8;
break;
}
return result;
}
I32
Perl_my_fflush_all(pTHX)
{
#if defined(USE_PERLIO) || defined(FFLUSH_NULL) || defined(USE_SFIO)
return PerlIO_flush(NULL);
#else
# if defined(HAS__FWALK)
extern int fflush(FILE *);
/* undocumented, unprototyped, but very useful BSDism */
extern void _fwalk(int (*)(FILE *));
_fwalk(&fflush);
return 0;
# else
# if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY)
long open_max = -1;
# ifdef PERL_FFLUSH_ALL_FOPEN_MAX
open_max = PERL_FFLUSH_ALL_FOPEN_MAX;
# else
# if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX)
open_max = sysconf(_SC_OPEN_MAX);
# else
# ifdef FOPEN_MAX
open_max = FOPEN_MAX;
# else
# ifdef OPEN_MAX
open_max = OPEN_MAX;
# else
# ifdef _NFILE
open_max = _NFILE;
# endif
# endif
# endif
# endif
# endif
if (open_max > 0) {
long i;
for (i = 0; i < open_max; i++)
if (STDIO_STREAM_ARRAY[i]._file >= 0 &&
STDIO_STREAM_ARRAY[i]._file < open_max &&
STDIO_STREAM_ARRAY[i]._flag)
PerlIO_flush(&STDIO_STREAM_ARRAY[i]);
return 0;
}
# endif
SETERRNO(EBADF,RMS_IFI);
return EOF;
# endif
#endif
}
void
Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
{
char *func =
op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
PL_op_desc[op];
char *pars = OP_IS_FILETEST(op) ? "" : "()";
char *type = OP_IS_SOCKET(op)
|| (gv && io && IoTYPE(io) == IoTYPE_SOCKET)
? "socket" : "filehandle";
char *name = NULL;
if (gv && isGV(gv)) {
name = GvENAME(gv);
}
if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
if (ckWARN(WARN_IO)) {
const char *direction = (op == OP_phoney_INPUT_ONLY) ? "in" : "out";
if (name && *name)
Perl_warner(aTHX_ packWARN(WARN_IO),
"Filehandle %s opened only for %sput",
name, direction);
else
Perl_warner(aTHX_ packWARN(WARN_IO),
"Filehandle opened only for %sput", direction);
}
}
else {
char *vile;
I32 warn_type;
if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
vile = "closed";
warn_type = WARN_CLOSED;
}
else {
vile = "unopened";
warn_type = WARN_UNOPENED;
}
if (ckWARN(warn_type)) {
if (name && *name) {
Perl_warner(aTHX_ packWARN(warn_type),
"%s%s on %s %s %s", func, pars, vile, type, name);
if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
Perl_warner(
aTHX_ packWARN(warn_type),
"\t(Are you trying to call %s%s on dirhandle %s?)\n",
func, pars, name
);
}
else {
Perl_warner(aTHX_ packWARN(warn_type),
"%s%s on %s %s", func, pars, vile, type);
if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
Perl_warner(
aTHX_ packWARN(warn_type),
"\t(Are you trying to call %s%s on dirhandle?)\n",
func, pars
);
}
}
}
}
#ifdef EBCDIC
/* in ASCII order, not that it matters */
static const char controllablechars[] = "?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
int
Perl_ebcdic_control(pTHX_ int ch)
{
if (ch > 'a') {
char *ctlp;
if (islower(ch))
ch = toupper(ch);
if ((ctlp = strchr(controllablechars, ch)) == 0) {
Perl_die(aTHX_ "unrecognised control character '%c'\n", ch);
}
if (ctlp == controllablechars)
return('\177'); /* DEL */
else
return((unsigned char)(ctlp - controllablechars - 1));
} else { /* Want uncontrol */
if (ch == '\177' || ch == -1)
return('?');
else if (ch == '\157')
return('\177');
else if (ch == '\174')
return('\000');
else if (ch == '^') /* '\137' in 1047, '\260' in 819 */
return('\036');
else if (ch == '\155')
return('\037');
else if (0 < ch && ch < (sizeof(controllablechars) - 1))
return(controllablechars[ch+1]);
else
Perl_die(aTHX_ "invalid control request: '\\%03o'\n", ch & 0xFF);
}
}
#endif
/* To workaround core dumps from the uninitialised tm_zone we get the
* system to give us a reasonable struct to copy. This fix means that
* strftime uses the tm_zone and tm_gmtoff values returned by
* localtime(time()). That should give the desired result most of the
* time. But probably not always!
*
* This does not address tzname aspects of NETaa14816.
*
*/
#ifdef HAS_GNULIBC
# ifndef STRUCT_TM_HASZONE
# define STRUCT_TM_HASZONE
# endif
#endif
#ifdef STRUCT_TM_HASZONE /* Backward compat */
# ifndef HAS_TM_TM_ZONE
# define HAS_TM_TM_ZONE
# endif
#endif
void
Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */
{
#ifdef HAS_TM_TM_ZONE
Time_t now;
(void)time(&now);
Copy(localtime(&now), ptm, 1, struct tm);
#endif
}
/*
* mini_mktime - normalise struct tm values without the localtime()
* semantics (and overhead) of mktime().
*/
void
Perl_mini_mktime(pTHX_ struct tm *ptm)
{
int yearday;
int secs;
int month, mday, year, jday;
int odd_cent, odd_year;
#define DAYS_PER_YEAR 365
#define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1)
#define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1)
#define DAYS_PER_QCENT (4*DAYS_PER_CENT+1)
#define SECS_PER_HOUR (60*60)
#define SECS_PER_DAY (24*SECS_PER_HOUR)
/* parentheses deliberately absent on these two, otherwise they don't work */
#define MONTH_TO_DAYS 153/5
#define DAYS_TO_MONTH 5/153
/* offset to bias by March (month 4) 1st between month/mday & year finding */
#define YEAR_ADJUST (4*MONTH_TO_DAYS+1)
/* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */
#define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */
/*
* Year/day algorithm notes:
*
* With a suitable offset for numeric value of the month, one can find
* an offset into the year by considering months to have 30.6 (153/5) days,
* using integer arithmetic (i.e., with truncation). To avoid too much
* messing about with leap days, we consider January and February to be
* the 13th and 14th month of the previous year. After that transformation,
* we need the month index we use to be high by 1 from 'normal human' usage,
* so the month index values we use run from 4 through 15.
*
* Given that, and the rules for the Gregorian calendar (leap years are those
* divisible by 4 unless also divisible by 100, when they must be divisible
* by 400 instead), we can simply calculate the number of days since some
* arbitrary 'beginning of time' by futzing with the (adjusted) year number,
* the days we derive from our month index, and adding in the day of the
* month. The value used here is not adjusted for the actual origin which
* it normally would use (1 January A.D. 1), since we're not exposing it.
* We're only building the value so we can turn around and get the
* normalised values for the year, month, day-of-month, and day-of-year.
*
* For going backward, we need to bias the value we're using so that we find
* the right year value. (Basically, we don't want the contribution of
* March 1st to the number to apply while deriving the year). Having done
* that, we 'count up' the contribution to the year number by accounting for
* full quadracenturies (400-year periods) with their extra leap days, plus
* the contribution from full centuries (to avoid counting in the lost leap
* days), plus the contribution from full quad-years (to count in the normal
* leap days), plus the leftover contribution from any non-leap years.
* At this point, if we were working with an actual leap day, we'll have 0
* days left over. This is also true for March 1st, however. So, we have
* to special-case that result, and (earlier) keep track of the 'odd'
* century and year contributions. If we got 4 extra centuries in a qcent,
* or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb.
* Otherwise, we add back in the earlier bias we removed (the 123 from
* figuring in March 1st), find the month index (integer division by 30.6),
* and the remainder is the day-of-month. We then have to convert back to
* 'real' months (including fixing January and February from being 14/15 in
* the previous year to being in the proper year). After that, to get
* tm_yday, we work with the normalised year and get a new yearday value for
* January 1st, which we subtract from the yearday value we had earlier,
* representing the date we've re-built. This is done from January 1
* because tm_yday is 0-origin.
*
* Since POSIX time routines are only guaranteed to work for times since the
* UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm
* applies Gregorian calendar rules even to dates before the 16th century
* doesn't bother me. Besides, you'd need cultural context for a given
* date to know whether it was Julian or Gregorian calendar, and that's
* outside the scope for this routine. Since we convert back based on the
* same rules we used to build the yearday, you'll only get strange results
* for input which needed normalising, or for the 'odd' century years which
* were leap years in the Julian calander but not in the Gregorian one.
* I can live with that.
*
* This algorithm also fails to handle years before A.D. 1 gracefully, but
* that's still outside the scope for POSIX time manipulation, so I don't
* care.
*/
year = 1900 + ptm->tm_year;
month = ptm->tm_mon;
mday = ptm->tm_mday;
/* allow given yday with no month & mday to dominate the result */
if (ptm->tm_yday >= 0 && mday <= 0 && month <= 0) {
month = 0;
mday = 0;
jday = 1 + ptm->tm_yday;
}
else {
jday = 0;
}
if (month >= 2)
month+=2;
else
month+=14, year--;
yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400;
yearday += month*MONTH_TO_DAYS + mday + jday;
/*
* Note that we don't know when leap-seconds were or will be,
* so we have to trust the user if we get something which looks
* like a sensible leap-second. Wild values for seconds will
* be rationalised, however.
*/
if ((unsigned) ptm->tm_sec <= 60) {
secs = 0;
}
else {
secs = ptm->tm_sec;
ptm->tm_sec = 0;
}
secs += 60 * ptm->tm_min;
secs += SECS_PER_HOUR * ptm->tm_hour;
if (secs < 0) {
if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) {
/* got negative remainder, but need positive time */
/* back off an extra day to compensate */
yearday += (secs/SECS_PER_DAY)-1;
secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1);
}
else {
yearday += (secs/SECS_PER_DAY);
secs -= SECS_PER_DAY * (secs/SECS_PER_DAY);
}
}
else if (secs >= SECS_PER_DAY) {
yearday += (secs/SECS_PER_DAY);
secs %= SECS_PER_DAY;
}
ptm->tm_hour = secs/SECS_PER_HOUR;
secs %= SECS_PER_HOUR;
ptm->tm_min = secs/60;
secs %= 60;
ptm->tm_sec += secs;
/* done with time of day effects */
/*
* The algorithm for yearday has (so far) left it high by 428.
* To avoid mistaking a legitimate Feb 29 as Mar 1, we need to
* bias it by 123 while trying to figure out what year it
* really represents. Even with this tweak, the reverse
* translation fails for years before A.D. 0001.
* It would still fail for Feb 29, but we catch that one below.
*/
jday = yearday; /* save for later fixup vis-a-vis Jan 1 */
yearday -= YEAR_ADJUST;
year = (yearday / DAYS_PER_QCENT) * 400;
yearday %= DAYS_PER_QCENT;
odd_cent = yearday / DAYS_PER_CENT;
year += odd_cent * 100;
yearday %= DAYS_PER_CENT;
year += (yearday / DAYS_PER_QYEAR) * 4;
yearday %= DAYS_PER_QYEAR;
odd_year = yearday / DAYS_PER_YEAR;
year += odd_year;
yearday %= DAYS_PER_YEAR;
if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */
month = 1;
yearday = 29;
}
else {
yearday += YEAR_ADJUST; /* recover March 1st crock */
month = yearday*DAYS_TO_MONTH;
yearday -= month*MONTH_TO_DAYS;
/* recover other leap-year adjustment */
if (month > 13) {
month-=14;
year++;
}
else {
month-=2;
}
}
ptm->tm_year = year - 1900;
if (yearday) {
ptm->tm_mday = yearday;
ptm->tm_mon = month;
}
else {
ptm->tm_mday = 31;
ptm->tm_mon = month - 1;
}
/* re-build yearday based on Jan 1 to get tm_yday */
year--;
yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400;
yearday += 14*MONTH_TO_DAYS + 1;
ptm->tm_yday = jday - yearday;
/* fix tm_wday if not overridden by caller */
if ((unsigned)ptm->tm_wday > 6)
ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7;
}
char *
Perl_my_strftime(pTHX_ char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst)
{
#ifdef HAS_STRFTIME
char *buf;
int buflen;
struct tm mytm;
int len;
init_tm(&mytm); /* XXX workaround - see init_tm() above */
mytm.tm_sec = sec;
mytm.tm_min = min;
mytm.tm_hour = hour;
mytm.tm_mday = mday;
mytm.tm_mon = mon;
mytm.tm_year = year;
mytm.tm_wday = wday;
mytm.tm_yday = yday;
mytm.tm_isdst = isdst;
mini_mktime(&mytm);
/* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */
#if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE))
STMT_START {
struct tm mytm2;
mytm2 = mytm;
mktime(&mytm2);
#ifdef HAS_TM_TM_GMTOFF
mytm.tm_gmtoff = mytm2.tm_gmtoff;
#endif
#ifdef HAS_TM_TM_ZONE
mytm.tm_zone = mytm2.tm_zone;
#endif
} STMT_END;
#endif
buflen = 64;
New(0, buf, buflen, char);
len = strftime(buf, buflen, fmt, &mytm);
/*
** The following is needed to handle to the situation where
** tmpbuf overflows. Basically we want to allocate a buffer
** and try repeatedly. The reason why it is so complicated
** is that getting a return value of 0 from strftime can indicate
** one of the following:
** 1. buffer overflowed,
** 2. illegal conversion specifier, or
** 3. the format string specifies nothing to be returned(not
** an error). This could be because format is an empty string
** or it specifies %p that yields an empty string in some locale.
** If there is a better way to make it portable, go ahead by
** all means.
*/
if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0'))
return buf;
else {
/* Possibly buf overflowed - try again with a bigger buf */
int fmtlen = strlen(fmt);
int bufsize = fmtlen + buflen;
New(0, buf, bufsize, char);
while (buf) {
buflen = strftime(buf, bufsize, fmt, &mytm);
if (buflen > 0 && buflen < bufsize)
break;
/* heuristic to prevent out-of-memory errors */
if (bufsize > 100*fmtlen) {
Safefree(buf);
buf = NULL;
break;
}
bufsize *= 2;
Renew(buf, bufsize, char);
}
return buf;
}
#else
Perl_croak(aTHX_ "panic: no strftime");
#endif
}
#define SV_CWD_RETURN_UNDEF \
sv_setsv(sv, &PL_sv_undef); \
return FALSE
#define SV_CWD_ISDOT(dp) \
(dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
/*
=head1 Miscellaneous Functions
=for apidoc getcwd_sv
Fill the sv with current working directory
=cut
*/
/* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars.
* rewritten again by dougm, optimized for use with xs TARG, and to prefer
* getcwd(3) if available
* Comments from the orignal:
* This is a faster version of getcwd. It's also more dangerous
* because you might chdir out of a directory that you can't chdir
* back into. */
int
Perl_getcwd_sv(pTHX_ register SV *sv)
{
#ifndef PERL_MICRO
#ifndef INCOMPLETE_TAINTS
SvTAINTED_on(sv);
#endif
#ifdef HAS_GETCWD
{
char buf[MAXPATHLEN];
/* Some getcwd()s automatically allocate a buffer of the given
* size from the heap if they are given a NULL buffer pointer.
* The problem is that this behaviour is not portable. */
if (getcwd(buf, sizeof(buf) - 1)) {
STRLEN len = strlen(buf);
sv_setpvn(sv, buf, len);
return TRUE;
}
else {
sv_setsv(sv, &PL_sv_undef);
return FALSE;
}
}
#else
Stat_t statbuf;
int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
int namelen, pathlen=0;
DIR *dir;
Direntry_t *dp;
(void)SvUPGRADE(sv, SVt_PV);
if (PerlLIO_lstat(".", &statbuf) < 0) {
SV_CWD_RETURN_UNDEF;
}
orig_cdev = statbuf.st_dev;
orig_cino = statbuf.st_ino;
cdev = orig_cdev;
cino = orig_cino;
for (;;) {
odev = cdev;
oino = cino;
if (PerlDir_chdir("..") < 0) {
SV_CWD_RETURN_UNDEF;
}
if (PerlLIO_stat(".", &statbuf) < 0) {
SV_CWD_RETURN_UNDEF;
}
cdev = statbuf.st_dev;
cino = statbuf.st_ino;
if (odev == cdev && oino == cino) {
break;
}
if (!(dir = PerlDir_open("."))) {
SV_CWD_RETURN_UNDEF;
}
while ((dp = PerlDir_read(dir)) != NULL) {
#ifdef DIRNAMLEN
namelen = dp->d_namlen;
#else
namelen = strlen(dp->d_name);
#endif
/* skip . and .. */
if (SV_CWD_ISDOT(dp)) {
continue;
}
if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
SV_CWD_RETURN_UNDEF;
}
tdev = statbuf.st_dev;
tino = statbuf.st_ino;
if (tino == oino && tdev == odev) {
break;
}
}
if (!dp) {
SV_CWD_RETURN_UNDEF;
}
if (pathlen + namelen + 1 >= MAXPATHLEN) {
SV_CWD_RETURN_UNDEF;
}
SvGROW(sv, pathlen + namelen + 1);
if (pathlen) {
/* shift down */
Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
}
/* prepend current directory to the front */
*SvPVX(sv) = '/';
Move(dp->d_name, SvPVX(sv)+1, namelen, char);
pathlen += (namelen + 1);
#ifdef VOID_CLOSEDIR
PerlDir_close(dir);
#else
if (PerlDir_close(dir) < 0) {
SV_CWD_RETURN_UNDEF;
}
#endif
}
if (pathlen) {
SvCUR_set(sv, pathlen);
*SvEND(sv) = '\0';
SvPOK_only(sv);
if (PerlDir_chdir(SvPVX(sv)) < 0) {
SV_CWD_RETURN_UNDEF;
}
}
if (PerlLIO_stat(".", &statbuf) < 0) {
SV_CWD_RETURN_UNDEF;
}
cdev = statbuf.st_dev;
cino = statbuf.st_ino;
if (cdev != orig_cdev || cino != orig_cino) {
Perl_croak(aTHX_ "Unstable directory path, "
"current directory changed unexpectedly");
}
return TRUE;
#endif
#else
return FALSE;
#endif
}
#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT)
# define EMULATE_SOCKETPAIR_UDP
#endif
#ifdef EMULATE_SOCKETPAIR_UDP
static int
S_socketpair_udp (int fd[2]) {
dTHX;
/* Fake a datagram socketpair using UDP to localhost. */
int sockets[2] = {-1, -1};
struct sockaddr_in addresses[2];
int i;
Sock_size_t size = sizeof(struct sockaddr_in);
unsigned short port;
int got;
memset(&addresses, 0, sizeof(addresses));
i = 1;
do {
sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET);
if (sockets[i] == -1)
goto tidy_up_and_fail;
addresses[i].sin_family = AF_INET;
addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addresses[i].sin_port = 0; /* kernel choses port. */
if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i],
sizeof(struct sockaddr_in)) == -1)
goto tidy_up_and_fail;
} while (i--);
/* Now have 2 UDP sockets. Find out which port each is connected to, and
for each connect the other socket to it. */
i = 1;
do {
if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i],
&size) == -1)
goto tidy_up_and_fail;
if (size != sizeof(struct sockaddr_in))
goto abort_tidy_up_and_fail;
/* !1 is 0, !0 is 1 */
if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i],
sizeof(struct sockaddr_in)) == -1)
goto tidy_up_and_fail;
} while (i--);
/* Now we have 2 sockets connected to each other. I don't trust some other
process not to have already sent a packet to us (by random) so send
a packet from each to the other. */
i = 1;
do {
/* I'm going to send my own port number. As a short.
(Who knows if someone somewhere has sin_port as a bitfield and needs
this routine. (I'm assuming crays have socketpair)) */
port = addresses[i].sin_port;
got = PerlLIO_write(sockets[i], &port, sizeof(port));
if (got != sizeof(port)) {
if (got == -1)
goto tidy_up_and_fail;
goto abort_tidy_up_and_fail;
}
} while (i--);
/* Packets sent. I don't trust them to have arrived though.
(As I understand it Solaris TCP stack is multithreaded. Non-blocking
connect to localhost will use a second kernel thread. In 2.6 the
first thread running the connect() returns before the second completes,
so EINPROGRESS> In 2.7 the improved stack is faster and connect()
returns 0. Poor programs have tripped up. One poor program's authors'
had a 50-1 reverse stock split. Not sure how connected these were.)
So I don't trust someone not to have an unpredictable UDP stack.
*/
{
struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */
int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0];
fd_set rset;
FD_ZERO(&rset);
FD_SET(sockets[0], &rset);
FD_SET(sockets[1], &rset);
got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor);
if (got != 2 || !FD_ISSET(sockets[0], &rset)
|| !FD_ISSET(sockets[1], &rset)) {
/* I hope this is portable and appropriate. */
if (got == -1)
goto tidy_up_and_fail;
goto abort_tidy_up_and_fail;
}
}
/* And the paranoia department even now doesn't trust it to have arrive
(hence MSG_DONTWAIT). Or that what arrives was sent by us. */
{
struct sockaddr_in readfrom;
unsigned short buffer[2];
i = 1;
do {
#ifdef MSG_DONTWAIT
got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
sizeof(buffer), MSG_DONTWAIT,
(struct sockaddr *) &readfrom, &size);
#else
got = PerlSock_recvfrom(sockets[i], (char *) &buffer,
sizeof(buffer), 0,
(struct sockaddr *) &readfrom, &size);
#endif
if (got == -1)
goto tidy_up_and_fail;
if (got != sizeof(port)
|| size != sizeof(struct sockaddr_in)
/* Check other socket sent us its port. */
|| buffer[0] != (unsigned short) addresses[!i].sin_port
/* Check kernel says we got the datagram from that socket */
|| readfrom.sin_family != addresses[!i].sin_family
|| readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr
|| readfrom.sin_port != addresses[!i].sin_port)
goto abort_tidy_up_and_fail;
} while (i--);
}
/* My caller (my_socketpair) has validated that this is non-NULL */
fd[0] = sockets[0];
fd[1] = sockets[1];
/* I hereby declare this connection open. May God bless all who cross
her. */
return 0;
abort_tidy_up_and_fail:
errno = ECONNABORTED;
tidy_up_and_fail:
{
int save_errno = errno;
if (sockets[0] != -1)
PerlLIO_close(sockets[0]);
if (sockets[1] != -1)
PerlLIO_close(sockets[1]);
errno = save_errno;
return -1;
}
}
#endif /* EMULATE_SOCKETPAIR_UDP */
#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET)
int
Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
/* Stevens says that family must be AF_LOCAL, protocol 0.
I'm going to enforce that, then ignore it, and use TCP (or UDP). */
dTHX;
int listener = -1;
int connector = -1;
int acceptor = -1;
struct sockaddr_in listen_addr;
struct sockaddr_in connect_addr;
Sock_size_t size;
if (protocol
#ifdef AF_UNIX
|| family != AF_UNIX
#endif
) {
errno = EAFNOSUPPORT;
return -1;
}
if (!fd) {
errno = EINVAL;
return -1;
}
#ifdef EMULATE_SOCKETPAIR_UDP
if (type == SOCK_DGRAM)
return S_socketpair_udp(fd);
#endif
listener = PerlSock_socket(AF_INET, type, 0);
if (listener == -1)
return -1;
memset(&listen_addr, 0, sizeof(listen_addr));
listen_addr.sin_family = AF_INET;
listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
listen_addr.sin_port = 0; /* kernel choses port. */
if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr,
sizeof(listen_addr)) == -1)
goto tidy_up_and_fail;
if (PerlSock_listen(listener, 1) == -1)
goto tidy_up_and_fail;
connector = PerlSock_socket(AF_INET, type, 0);
if (connector == -1)
goto tidy_up_and_fail;
/* We want to find out the port number to connect to. */
size = sizeof(connect_addr);
if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr,
&size) == -1)
goto tidy_up_and_fail;
if (size != sizeof(connect_addr))
goto abort_tidy_up_and_fail;
if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr,
sizeof(connect_addr)) == -1)
goto tidy_up_and_fail;
size = sizeof(listen_addr);
acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr,
&size);
if (acceptor == -1)
goto tidy_up_and_fail;
if (size != sizeof(listen_addr))
goto abort_tidy_up_and_fail;
PerlLIO_close(listener);
/* Now check we are talking to ourself by matching port and host on the
two sockets. */
if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr,
&size) == -1)
goto tidy_up_and_fail;
if (size != sizeof(connect_addr)
|| listen_addr.sin_family != connect_addr.sin_family
|| listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr
|| listen_addr.sin_port != connect_addr.sin_port) {
goto abort_tidy_up_and_fail;
}
fd[0] = connector;
fd[1] = acceptor;
return 0;
abort_tidy_up_and_fail:
errno = ECONNABORTED; /* I hope this is portable and appropriate. */
tidy_up_and_fail:
{
int save_errno = errno;
if (listener != -1)
PerlLIO_close(listener);
if (connector != -1)
PerlLIO_close(connector);
if (acceptor != -1)
PerlLIO_close(acceptor);
errno = save_errno;
return -1;
}
}
#else
/* In any case have a stub so that there's code corresponding
* to the my_socketpair in global.sym. */
int
Perl_my_socketpair (int family, int type, int protocol, int fd[2]) {
#ifdef HAS_SOCKETPAIR
return socketpair(family, type, protocol, fd);
#else
return -1;
#endif
}
#endif
/*
=for apidoc sv_nosharing
Dummy routine which "shares" an SV when there is no sharing module present.
Exists to avoid test for a NULL function pointer and because it could potentially warn under
some level of strict-ness.
=cut
*/
void
Perl_sv_nosharing(pTHX_ SV *sv)
{
}
/*
=for apidoc sv_nolocking
Dummy routine which "locks" an SV when there is no locking module present.
Exists to avoid test for a NULL function pointer and because it could potentially warn under
some level of strict-ness.
=cut
*/
void
Perl_sv_nolocking(pTHX_ SV *sv)
{
}
/*
=for apidoc sv_nounlocking
Dummy routine which "unlocks" an SV when there is no locking module present.
Exists to avoid test for a NULL function pointer and because it could potentially warn under
some level of strict-ness.
=cut
*/
void
Perl_sv_nounlocking(pTHX_ SV *sv)
{
}
U32
Perl_parse_unicode_opts(pTHX_ char **popt)
{
char *p = *popt;
U32 opt = 0;
if (*p) {
if (isDIGIT(*p)) {
opt = (U32) atoi(p);
while (isDIGIT(*p)) p++;
if (*p && *p != '\n' && *p != '\r')
Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p);
}
else {
for (; *p; p++) {
switch (*p) {
case PERL_UNICODE_STDIN:
opt |= PERL_UNICODE_STDIN_FLAG; break;
case PERL_UNICODE_STDOUT:
opt |= PERL_UNICODE_STDOUT_FLAG; break;
case PERL_UNICODE_STDERR:
opt |= PERL_UNICODE_STDERR_FLAG; break;
case PERL_UNICODE_STD:
opt |= PERL_UNICODE_STD_FLAG; break;
case PERL_UNICODE_IN:
opt |= PERL_UNICODE_IN_FLAG; break;
case PERL_UNICODE_OUT:
opt |= PERL_UNICODE_OUT_FLAG; break;
case PERL_UNICODE_INOUT:
opt |= PERL_UNICODE_INOUT_FLAG; break;
case PERL_UNICODE_LOCALE:
opt |= PERL_UNICODE_LOCALE_FLAG; break;
case PERL_UNICODE_ARGV:
opt |= PERL_UNICODE_ARGV_FLAG; break;
default:
if (*p != '\n' && *p != '\r')
Perl_croak(aTHX_
"Unknown Unicode option letter '%c'", *p);
}
}
}
}
else
opt = PERL_UNICODE_DEFAULT_FLAGS;
if (opt & ~PERL_UNICODE_ALL_FLAGS)
Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf,
(UV) (opt & ~PERL_UNICODE_ALL_FLAGS));
*popt = p;
return opt;
}
U32
Perl_seed(pTHX)
{
/*
* This is really just a quick hack which grabs various garbage
* values. It really should be a real hash algorithm which
* spreads the effect of every input bit onto every output bit,
* if someone who knows about such things would bother to write it.
* Might be a good idea to add that function to CORE as well.
* No numbers below come from careful analysis or anything here,
* except they are primes and SEED_C1 > 1E6 to get a full-width
* value from (tv_sec * SEED_C1 + tv_usec). The multipliers should
* probably be bigger too.
*/
#if RANDBITS > 16
# define SEED_C1 1000003
#define SEED_C4 73819
#else
# define SEED_C1 25747
#define SEED_C4 20639
#endif
#define SEED_C2 3
#define SEED_C3 269
#define SEED_C5 26107
#ifndef PERL_NO_DEV_RANDOM
int fd;
#endif
U32 u;
#ifdef VMS
# include <starlet.h>
/* when[] = (low 32 bits, high 32 bits) of time since epoch
* in 100-ns units, typically incremented ever 10 ms. */
unsigned int when[2];
#else
# ifdef HAS_GETTIMEOFDAY
struct timeval when;
# else
Time_t when;
# endif
#endif
/* This test is an escape hatch, this symbol isn't set by Configure. */
#ifndef PERL_NO_DEV_RANDOM
#ifndef PERL_RANDOM_DEVICE
/* /dev/random isn't used by default because reads from it will block
* if there isn't enough entropy available. You can compile with
* PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there
* is enough real entropy to fill the seed. */
# define PERL_RANDOM_DEVICE "/dev/urandom"
#endif
fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0);
if (fd != -1) {
if (PerlLIO_read(fd, &u, sizeof u) != sizeof u)
u = 0;
PerlLIO_close(fd);
if (u)
return u;
}
#endif
#ifdef VMS
_ckvmssts(sys$gettim(when));
u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1];
#else
# ifdef HAS_GETTIMEOFDAY
PerlProc_gettimeofday(&when,NULL);
u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec;
# else
(void)time(&when);
u = (U32)SEED_C1 * when;
# endif
#endif
u += SEED_C3 * (U32)PerlProc_getpid();
u += SEED_C4 * (U32)PTR2UV(PL_stack_sp);
#ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */
u += SEED_C5 * (U32)PTR2UV(&when);
#endif
return u;
}
UV
Perl_get_hash_seed(pTHX)
{
char *s = PerlEnv_getenv("PERL_HASH_SEED");
UV myseed = 0;
if (s)
while (isSPACE(*s)) s++;
if (s && isDIGIT(*s))
myseed = (UV)Atoul(s);
else
#ifdef USE_HASH_SEED_EXPLICIT
if (s)
#endif
{
/* Compute a random seed */
(void)seedDrand01((Rand_seed_t)seed());
myseed = (UV)(Drand01() * (NV)UV_MAX);
#if RANDBITS < (UVSIZE * 8)
/* Since there are not enough randbits to to reach all
* the bits of a UV, the low bits might need extra
* help. Sum in another random number that will
* fill in the low bits. */
myseed +=
(UV)(Drand01() * (NV)((1 << ((UVSIZE * 8 - RANDBITS))) - 1));
#endif /* RANDBITS < (UVSIZE * 8) */
if (myseed == 0) { /* Superparanoia. */
myseed = (UV)(Drand01() * (NV)UV_MAX); /* One more chance. */
if (myseed == 0)
Perl_croak(aTHX_ "Your random numbers are not that random");
}
}
PL_rehash_seed_set = TRUE;
return myseed;
}