/* util.c
*
- * Copyright (c) 1991-2001, Larry Wall
+ * Copyright (c) 1991-2002, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
# include <sys/wait.h>
#endif
+#ifdef HAS_SELECT
+# ifdef I_SYS_SELECT
+# include <sys/select.h>
+# endif
+#endif
+
#define FLUSH
#ifdef LEAKTEST
Malloc_t Perl_malloc (MEM_SIZE nbytes)
{
dTHXs;
- return PerlMem_malloc(nbytes);
+ return (Malloc_t)PerlMem_malloc(nbytes);
}
Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size)
{
dTHXs;
- return PerlMem_calloc(elements, size);
+ return (Malloc_t)PerlMem_calloc(elements, size);
}
Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes)
{
dTHXs;
- return PerlMem_realloc(where, nbytes);
+ return (Malloc_t)PerlMem_realloc(where, nbytes);
}
Free_t Perl_mfree (Malloc_t where)
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()
}
}
BmRARE(sv) = s[rarest];
- BmPREVIOUS(sv) = rarest;
+ BmPREVIOUS(sv) = (U16)rarest;
BmUSEFUL(sv) = 100; /* Initial value */
if (flags & FBMcf_TAIL)
SvTAIL_on(sv);
register STRLEN littlelen = l;
register I32 multiline = flags & FBMrf_MULTILINE;
- if (bigend - big < littlelen) {
+ if ((STRLEN)(bigend - big) < littlelen) {
if ( SvTAIL(littlestr)
- && (bigend - big == littlelen - 1)
+ && ((STRLEN)(bigend - big) == littlelen - 1)
&& (littlelen == 1
|| (*big == *little &&
memEQ((char *)big, (char *)little, littlelen - 1))))
register unsigned char *table = little + littlelen + FBM_TABLE_OFFSET;
register unsigned char *oldlittle;
- if (littlelen > bigend - big)
+ if (littlelen > (STRLEN)(bigend - big))
return Nullch;
--littlelen; /* Last char found by table lookup */
/* start_shift, end_shift are positive quantities which give offsets
of ends of some substring of bigstr.
- If `last' we want the last occurence.
+ 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.
/* copy a string to a safe spot */
/*
+=head1 Memory Management
+
=for apidoc savepv
-Copy a string to a safe spot. This does not use an SV.
+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 *sv)
+Perl_savepv(pTHX_ const char *pv)
{
- register char *newaddr;
-
- New(902,newaddr,strlen(sv)+1,char);
- (void)strcpy(newaddr,sv);
+ register char *newaddr = Nullch;
+ if (pv) {
+ New(902,newaddr,strlen(pv)+1,char);
+ (void)strcpy(newaddr,pv);
+ }
return newaddr;
}
/*
=for apidoc savepvn
-Copy a string to a safe spot. The C<len> indicates number of bytes to
-copy. This does not use an SV.
+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 *sv, register I32 len)
+Perl_savepvn(pTHX_ const char *pv, register I32 len)
{
register char *newaddr;
New(903,newaddr,len+1,char);
- Copy(sv,newaddr,len,char); /* might not be null terminated */
- newaddr[len] = '\0'; /* is now */
+ /* 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 *
}
#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, ...)
{
if (CopLINE(cop))
Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf,
- CopFILE(cop), (IV)CopLINE(cop));
+ 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)));
+ 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)
#endif /* PERL_IMPLICIT_CONTEXT */
/*
+=head1 Warning and Dieing
+
=for apidoc croak
This is the XSUB-writer's interface to Perl's C<die> function.
CV *cv;
SV *msv;
STRLEN msglen;
+ IO *io;
+ MAGIC *mg;
msv = vmess(pat, args);
message = SvPV(msv, msglen);
return;
}
}
+
+ /* if STDERR is tied, use it instead */
+ if (PL_stderrgv && (io = GvIOp(PL_stderrgv))
+ && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) {
+ dSP; ENTER;
+ PUSHMARK(SP);
+ XPUSHs(SvTIED_obj((SV*)io, mg));
+ XPUSHs(sv_2mortal(newSVpvn(message, msglen)));
+ PUTBACK;
+ call_method("PRINT", G_SCALAR);
+ LEAVE;
+ return;
+ }
+
{
PerlIO *serr = Perl_error_log;
*(s+(nlen+1+vlen)) = '\0'
#ifdef USE_ENVIRON_ARRAY
- /* VMS' and EPOC's my_setenv() is in vms.c and epoc.c */
+ /* 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? */
my_setenv_format(environ[i], nam, nlen, val, vlen);
#else /* PERL_USE_SAFE_PUTENV */
-# if defined(__CYGWIN__)
+# if defined(__CYGWIN__) || defined( EPOC)
setenv(nam, val, 1);
# else
char *new_env;
(void)putenv(new_env);
# endif /* __CYGWIN__ */
#endif /* PERL_USE_SAFE_PUTENV */
+ }
}
#else /* WIN32 || NETWARE */
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]);
#undef THAT
#define THIS that
#define THAT This
- /* Close parent's end of _the_ pipe */
- PerlLIO_close(p[THAT]);
/* Close parent's end of error status pipe (if any) */
if (did_pipes) {
PerlLIO_close(pp[0]);
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
}
/* Parent */
do_execfree(); /* free any memory malloced by child on fork */
- /* Close child's end of pipe */
- PerlLIO_close(p[that]);
if (did_pipes)
PerlLIO_close(pp[1]);
/* Keep the lower of the two fd numbers */
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;
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 {
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]);
#undef THAT
#define THIS that
#define THAT This
- PerlLIO_close(p[THAT]);
if (did_pipes) {
PerlLIO_close(pp[0]);
#if defined(HAS_FCNTL) && defined(F_SETFD)
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)
}
#endif /* defined OS2 */
/*SUPPRESS 560*/
- if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV)))
+ if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) {
+ SvREADONLY_off(GvSV(tmpgv));
sv_setiv(GvSV(tmpgv), PerlProc_getpid());
+ SvREADONLY_on(GvSV(tmpgv));
+ }
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 fork */
- PerlLIO_close(p[that]);
+ do_execfree(); /* free any memory malloced by child on vfork */
if (did_pipes)
PerlLIO_close(pp[1]);
if (p[that] < p[This]) {
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;
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 {
return PerlIO_fdopen(p[This], mode);
}
#else
-#if defined(atarist)
+#if defined(atarist) || defined(EPOC)
FILE *popen();
PerlIO *
Perl_my_popen(pTHX_ char *cmd, char *mode)
Perl_dump_fds(pTHX_ char *s)
{
int fd;
- struct stat tmpstatbuf;
+ Stat_t tmpstatbuf;
PerlIO_printf(Perl_debug_log,"%s", s);
for (fd = 0; fd < 32; fd++) {
{
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 !defined(USE_PERLIO) || defined(PERL_OLD_SIGNALS)
+#if defined(PERL_OLD_SIGNALS)
act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
#endif
{
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 !defined(USE_PERLIO) || defined(PERL_OLD_SIGNALS)
+#if defined(PERL_OLD_SIGNALS)
act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
#endif
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);
}
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);
}
{
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);
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;
}
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)
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);
if (!HAS_WAITPID_RUNTIME)
goto hard_way;
# endif
- return PerlProc_waitpid(pid,statusp,flags);
+ result = PerlProc_waitpid(pid,statusp,flags);
+ goto finish;
#endif
#if !defined(HAS_WAITPID) && defined(HAS_WAIT4)
- return wait4((pid==-1)?0:pid,statusp,flags,Null(struct rusage *));
+ 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:
{
- I32 result;
if (flags)
Perl_croak(aTHX_ "Can't do waitpid with flags");
else {
if (result < 0)
*statusp = -1;
}
- return result;
}
#endif
+ finish:
+ if (result < 0 && errno == EINTR) {
+ PERL_ASYNC_CHECK();
+ }
+ return result;
}
#endif /* !DOSISH || OS2 || WIN32 || NETWARE */
return;
}
-#if defined(atarist) || defined(OS2)
+#if defined(atarist) || defined(OS2) || defined(EPOC)
int pclose();
#ifdef HAS_FORK
int /* Cannot prototype with I32
{
char *fa = strrchr(a,'/');
char *fb = strrchr(b,'/');
- struct stat tmpstatbuf1;
- struct stat tmpstatbuf2;
+ Stat_t tmpstatbuf1;
+ Stat_t tmpstatbuf2;
SV *tmpsv = sv_newmortal();
if (fa)
char *xfailed = Nullch;
char tmpbuf[MAXPATHLEN];
register char *s;
- I32 len;
+ I32 len = 0;
int retval;
#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
# define SEARCH_EXTS ".bat", ".cmd", NULL
SvCUR_set(sv, sizeof(struct perl_thread));
thr = (Thread) SvPVX(sv);
#ifdef DEBUGGING
- memset(thr, 0xab, sizeof(struct perl_thread));
+ Poison(thr, 1, struct perl_thread);
PL_markstack = 0;
PL_scopestack = 0;
PL_savestack = 0;
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);
void
Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
{
- char *vile;
- I32 warn_type;
char *func =
op == OP_READLINE ? "readline" : /* "<HANDLE>" not nice */
op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */
"socket" : "filehandle";
char *name = NULL;
- if (gv && io && IoTYPE(io) == IoTYPE_CLOSED) {
- vile = "closed";
- warn_type = WARN_CLOSED;
- }
- else {
- vile = "unopened";
- warn_type = WARN_UNOPENED;
- }
-
if (gv && isGV(gv)) {
- SV *sv = sv_newmortal();
- gv_efullname4(sv, gv, Nullch, FALSE);
- name = SvPVX(sv);
+ name = GvENAME(gv);
}
if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
- if (name && *name)
- Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for %sput",
- name,
- (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
- else
- Perl_warner(aTHX_ WARN_IO, "Filehandle opened only for %sput",
- (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
- } else if (name && *name) {
- Perl_warner(aTHX_ 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_ warn_type,
- "\t(Are you trying to call %s%s on dirhandle %s?)\n",
- func, pars, name);
+ if (ckWARN(WARN_IO)) {
+ if (name && *name)
+ Perl_warner(aTHX_ packWARN(WARN_IO),
+ "Filehandle %s opened only for %sput",
+ name, (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
+ else
+ Perl_warner(aTHX_ packWARN(WARN_IO),
+ "Filehandle opened only for %sput",
+ (op == OP_phoney_INPUT_ONLY ? "in" : "out"));
+ }
}
else {
- Perl_warner(aTHX_ warn_type,
- "%s%s on %s %s", func, pars, vile, type);
- if (gv && io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP))
- Perl_warner(aTHX_ warn_type,
- "\t(Are you trying to call %s%s on dirhandle?)\n",
- func, pars);
+ 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);
+ }
+ }
}
}
}
#endif
-/* XXX struct tm on some systems (SunOS4/BSD) contains extra (non POSIX)
- * fields for which we don't have Configure support yet:
- * char *tm_zone; -- abbreviation of timezone name
- * long tm_gmtoff; -- offset from GMT in seconds
- * To workaround core dumps from the uninitialised tm_zone we get the
+/* 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 is a temporary workaround to be removed once Configure
- * support is added and NETaa14816 is considered in full.
- * It does not address tzname aspects of NETaa14816.
+ * 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 STRUCT_TM_HASZONE
+#ifdef HAS_TM_TM_ZONE
Time_t now;
(void)time(&now);
Copy(localtime(&now), ptm, 1, struct tm);
(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
/*
+=head1 Miscellaneous Functions
+
=for apidoc getcwd_sv
Fill the sv with current working directory
#else
- struct stat statbuf;
+ Stat_t statbuf;
int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
int namelen, pathlen=0;
DIR *dir;
Perl_croak(aTHX_ "Unstable directory path, "
"current directory changed unexpectedly");
}
-#endif
return TRUE;
+#endif
+
#else
return FALSE;
#endif
}
/*
+=head1 SV Manipulation Functions
+
=for apidoc new_vstring
Returns a pointer to the next character after the parsed
vstring, as well as updating the passed in sv.
- *
-Function must be called like
-
+
+Function must be called like
+
sv = NEWSV(92,5);
s = new_vstring(s,sv);
for (;;) {
rev = 0;
{
- /* this is atoi() that tolerates underscores */
- char *end = pos;
- UV mult = 1;
- if ( *(s-1) == '_') {
- mult = 10;
- }
- while (--end >= s) {
- UV orev;
- orev = rev;
- rev += (*end - '0') * mult;
- mult *= 10;
- if (orev > rev && ckWARN_d(WARN_OVERFLOW))
- Perl_warner(aTHX_ WARN_OVERFLOW,
- "Integer overflow in decimal number");
- }
+ /* this is atoi() that tolerates underscores */
+ char *end = pos;
+ UV mult = 1;
+ if ( s > pos && *(s-1) == '_') {
+ mult = 10;
+ }
+ while (--end >= s) {
+ UV orev;
+ orev = rev;
+ rev += (*end - '0') * mult;
+ mult *= 10;
+ if (orev > rev && ckWARN_d(WARN_OVERFLOW))
+ Perl_warner(aTHX_ packWARN(WARN_OVERFLOW),
+ "Integer overflow in decimal number");
+ }
}
+#ifdef EBCDIC
+ if (rev > 0x7FFFFFFF)
+ Perl_croak(aTHX "In EBCDIC the v-string components cannot exceed 2147483647");
+#endif
/* Append native character for the rev point */
tmpend = uvchr_to_utf8(tmpbuf, rev);
sv_catpvn(sv, (const char*)tmpbuf, tmpend - tmpbuf);
if (!UNI_IS_INVARIANT(NATIVE_TO_UNI(rev)))
- SvUTF8_on(sv);
+ SvUTF8_on(sv);
if ( (*pos == '.' || *pos == '_') && isDIGIT(pos[1]))
- s = ++pos;
+ s = ++pos;
else {
- s = pos;
- break;
+ s = pos;
+ break;
}
while (isDIGIT(*pos) )
- pos++;
+ pos++;
}
SvPOK_on(sv);
SvREADONLY_on(sv);
return s;
}
+#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)
+{
+}
https://perl5.git.perl.org / perl5.git / blobdiff