/* mg.c
*
- * Copyright (c) 1991-2003, Larry Wall
+ * Copyright (C) 1991, 1992, 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.
# include <sys/pstat.h>
#endif
+Signal_t Perl_csighandler(int sig);
+
/* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
#if !defined(HAS_SIGACTION) && defined(VMS)
# define FAKE_PERSISTENT_SIGNAL_HANDLERS
if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
+
+ /* guard against sv having been freed */
+ if (SvTYPE(sv) == SVTYPEMASK) {
+ Perl_croak(aTHX_ "Tied variable freed while still in use");
+ }
+ /* guard against magic having been deleted - eg FETCH calling
+ * untie */
+ if (!SvMAGIC(sv))
+ break;
+
/* Don't restore the flags for this entry if it was deleted. */
if (mg->mg_flags & MGf_GSKIP)
(SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
{
register I32 paren;
- register char *s;
+ register char *s = NULL;
register I32 i;
register REGEXP *rx;
sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
}
else if (PL_compiling.cop_warnings == pWARN_ALL) {
- sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
+ /* Get the bit mask for $warnings::Bits{all}, because
+ * it could have been extended by warnings::register */
+ SV **bits_all;
+ HV *bits=get_hv("warnings::Bits", FALSE);
+ if (bits && (bits_all=hv_fetch(bits, "all", 3, FALSE))) {
+ sv_setsv(sv, *bits_all);
+ }
+ else {
+ sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
+ }
}
else {
sv_setsv(sv, PL_compiling.cop_warnings);
}
break;
case '^':
- s = IoTOP_NAME(GvIOp(PL_defoutgv));
+ if (GvIOp(PL_defoutgv))
+ s = IoTOP_NAME(GvIOp(PL_defoutgv));
if (s)
sv_setpv(sv,s);
else {
}
break;
case '~':
- s = IoFMT_NAME(GvIOp(PL_defoutgv));
+ if (GvIOp(PL_defoutgv))
+ s = IoFMT_NAME(GvIOp(PL_defoutgv));
if (!s)
s = GvENAME(PL_defoutgv);
sv_setpv(sv,s);
break;
#ifndef lint
case '=':
- sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
break;
case '-':
- sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
break;
case '%':
- sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
break;
#endif
case ':':
WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
break;
case '|':
- sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
+ if (GvIOp(PL_defoutgv))
+ sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
break;
case ',':
break;
#endif
(void)SvIOK_on(sv); /* what a wonderful hack! */
break;
- case '*':
- break;
#ifndef MACOS_TRADITIONAL
case '0':
break;
int
Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
{
+#ifndef PERL_MICRO
#if defined(VMS) || defined(EPOC)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
}
# endif /* USE_ENVIRON_ARRAY */
# endif /* PERL_IMPLICIT_SYS || WIN32 */
-#endif /* VMS || EPC */
+#endif /* VMS || EPOC */
+#endif /* !PERL_MICRO */
return 0;
}
#endif
#ifndef PERL_MICRO
+#ifdef HAS_SIGPROCMASK
+static void
+restore_sigmask(pTHX_ SV *save_sv)
+{
+ sigset_t *ossetp = (sigset_t *) SvPV_nolen( save_sv );
+ (void)sigprocmask(SIG_SETMASK, ossetp, (sigset_t *)0);
+}
+#endif
int
Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN n_a;
/* Are we fetching a signal entry? */
i = whichsig(MgPV(mg,n_a));
- if (i) {
+ if (i > 0) {
if(PL_psig_ptr[i])
sv_setsv(sv,PL_psig_ptr[i]);
else {
int
Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
{
- I32 i;
+ /* XXX Some of this code was copied from Perl_magic_setsig. A little
+ * refactoring might be in order.
+ */
+ register char *s;
STRLEN n_a;
- /* Are we clearing a signal entry? */
- i = whichsig(MgPV(mg,n_a));
- if (i) {
- if(PL_psig_ptr[i]) {
- SvREFCNT_dec(PL_psig_ptr[i]);
- PL_psig_ptr[i]=0;
- }
- if(PL_psig_name[i]) {
- SvREFCNT_dec(PL_psig_name[i]);
- PL_psig_name[i]=0;
- }
+ SV* to_dec;
+ s = MgPV(mg,n_a);
+ if (*s == '_') {
+ SV** svp;
+ if (strEQ(s,"__DIE__"))
+ svp = &PL_diehook;
+ else if (strEQ(s,"__WARN__"))
+ svp = &PL_warnhook;
+ else
+ Perl_croak(aTHX_ "No such hook: %s", s);
+ if (*svp) {
+ to_dec = *svp;
+ *svp = 0;
+ SvREFCNT_dec(to_dec);
+ }
+ }
+ else {
+ I32 i;
+ /* Are we clearing a signal entry? */
+ i = whichsig(s);
+ if (i > 0) {
+#ifdef HAS_SIGPROCMASK
+ sigset_t set, save;
+ SV* save_sv;
+ /* Avoid having the signal arrive at a bad time, if possible. */
+ sigemptyset(&set);
+ sigaddset(&set,i);
+ sigprocmask(SIG_BLOCK, &set, &save);
+ ENTER;
+ save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
+ SAVEFREESV(save_sv);
+ SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
+#endif
+ PERL_ASYNC_CHECK();
+#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
+ if (!sig_handlers_initted) Perl_csighandler_init();
+#endif
+#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
+ sig_defaulting[i] = 1;
+ (void)rsignal(i, PL_csighandlerp);
+#else
+ (void)rsignal(i, SIG_DFL);
+#endif
+ if(PL_psig_name[i]) {
+ SvREFCNT_dec(PL_psig_name[i]);
+ PL_psig_name[i]=0;
+ }
+ if(PL_psig_ptr[i]) {
+ to_dec=PL_psig_ptr[i];
+ PL_psig_ptr[i]=0;
+ LEAVE;
+ SvREFCNT_dec(to_dec);
+ }
+ else
+ LEAVE;
+ }
}
return 0;
}
dTHX;
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
- (void) rsignal(sig, &Perl_csighandler);
+ (void) rsignal(sig, PL_csighandlerp);
if (sig_ignoring[sig]) return;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
dTHX;
sig_defaulting[sig] = 1;
- (void) rsignal(sig, &Perl_csighandler);
+ (void) rsignal(sig, PL_csighandlerp);
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
sig_ignoring[sig] = 0;
register char *s;
I32 i;
SV** svp = 0;
+ /* Need to be careful with SvREFCNT_dec(), because that can have side
+ * effects (due to closures). We must make sure that the new disposition
+ * is in place before it is called.
+ */
+ SV* to_dec = 0;
STRLEN len;
+#ifdef HAS_SIGPROCMASK
+ sigset_t set, save;
+ SV* save_sv;
+#endif
s = MgPV(mg,len);
if (*s == '_') {
Perl_croak(aTHX_ "No such hook: %s", s);
i = 0;
if (*svp) {
- SvREFCNT_dec(*svp);
+ to_dec = *svp;
*svp = 0;
}
}
else {
i = whichsig(s); /* ...no, a brick */
- if (!i) {
+ if (i < 0) {
if (ckWARN(WARN_SIGNAL))
Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
return 0;
}
+#ifdef HAS_SIGPROCMASK
+ /* Avoid having the signal arrive at a bad time, if possible. */
+ sigemptyset(&set);
+ sigaddset(&set,i);
+ sigprocmask(SIG_BLOCK, &set, &save);
+ ENTER;
+ save_sv = newSVpv((char *)(&save), sizeof(sigset_t));
+ SAVEFREESV(save_sv);
+ SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
+#endif
+ PERL_ASYNC_CHECK();
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
if (!sig_handlers_initted) Perl_csighandler_init();
#endif
sig_ignoring[i] = 0;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
- sig_defaulting[i] = 0;
+ sig_defaulting[i] = 0;
#endif
SvREFCNT_dec(PL_psig_name[i]);
- SvREFCNT_dec(PL_psig_ptr[i]);
+ to_dec = PL_psig_ptr[i];
PL_psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv); /* Make sure it doesn't go away on us */
PL_psig_name[i] = newSVpvn(s, len);
SvREADONLY_on(PL_psig_name[i]);
}
if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
- if (i)
- (void)rsignal(i, &Perl_csighandler);
+ if (i) {
+ (void)rsignal(i, PL_csighandlerp);
+#ifdef HAS_SIGPROCMASK
+ LEAVE;
+#endif
+ }
else
*svp = SvREFCNT_inc(sv);
+ if(to_dec)
+ SvREFCNT_dec(to_dec);
return 0;
}
s = SvPV_force(sv,len);
if (i) {
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
sig_ignoring[i] = 1;
- (void)rsignal(i, &Perl_csighandler);
+ (void)rsignal(i, PL_csighandlerp);
#else
(void)rsignal(i, SIG_IGN);
#endif
- } else
- *svp = 0;
+ }
}
else if (strEQ(s,"DEFAULT") || !*s) {
if (i)
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
{
sig_defaulting[i] = 1;
- (void)rsignal(i, &Perl_csighandler);
+ (void)rsignal(i, PL_csighandlerp);
}
#else
(void)rsignal(i, SIG_DFL);
#endif
- else
- *svp = 0;
}
else {
/*
if (!strchr(s,':') && !strchr(s,'\''))
sv_insert(sv, 0, 0, "main::", 6);
if (i)
- (void)rsignal(i, &Perl_csighandler);
+ (void)rsignal(i, PL_csighandlerp);
else
*svp = SvREFCNT_inc(sv);
}
+#ifdef HAS_SIGPROCMASK
+ if(i)
+ LEAVE;
+#endif
+ if(to_dec)
+ SvREFCNT_dec(to_dec);
return 0;
}
#endif /* !PERL_MICRO */
int
Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
{
- magic_methpack(sv,mg,"FETCH");
if (mg->mg_ptr)
mg->mg_flags |= MGf_GSKIP;
+ magic_methpack(sv,mg,"FETCH");
return 0;
}
}
i--;
}
+ SvREFCNT_dec(av); /* remove extra count added by sv_add_backref() */
return 0;
}
break;
case '\004': /* ^D */
- PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
+#ifdef DEBUGGING
+ s = SvPV_nolen(sv);
+ PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
DEBUG_x(dump_all());
+#else
+ PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
+#endif
break;
case '\005': /* ^E */
if (*(mg->mg_ptr+1) == '\0') {
}
}
break;
- case '*':
- i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
- PL_multiline = (i != 0);
- break;
case '/':
SvREFCNT_dec(PL_rs);
PL_rs = newSVsv(sv);
pstat(PSTAT_SETCMD, un, len, 0, 0);
}
#endif
- if (!PL_origalen) {
- s = PL_origargv[0];
- s += strlen(s);
- /* See if all the arguments are contiguous in memory */
- for (i = 1; i < PL_origargc; i++) {
- if (PL_origargv[i] == s + 1
-#ifdef OS2
- || PL_origargv[i] == s + 2
-#endif
- )
- {
- ++s;
- s += strlen(s); /* this one is ok too */
- }
- else
- break;
- }
- /* can grab env area too? */
- if (PL_origenviron
-#ifdef USE_ITHREADS
- && PL_curinterp == aTHX
-#endif
- && (PL_origenviron[0] == s + 1))
- {
- my_setenv("NoNe SuCh", Nullch);
- /* force copy of environment */
- for (i = 0; PL_origenviron[i]; i++)
- if (PL_origenviron[i] == s + 1) {
- ++s;
- s += strlen(s);
- }
- else
- break;
- }
- PL_origalen = s - PL_origargv[0];
- }
+ /* PL_origalen is set in perl_parse(). */
s = SvPV_force(sv,len);
- i = len;
- if (i >= (I32)PL_origalen) {
- i = PL_origalen;
- /* don't allow system to limit $0 seen by script */
- /* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
- Copy(s, PL_origargv[0], i, char);
- s = PL_origargv[0]+i;
- *s = '\0';
+ if (len >= (STRLEN)PL_origalen) {
+ /* Longer than original, will be truncated. */
+ Copy(s, PL_origargv[0], PL_origalen, char);
+ PL_origargv[0][PL_origalen - 1] = 0;
}
else {
- Copy(s, PL_origargv[0], i, char);
- s = PL_origargv[0]+i;
- *s++ = '\0';
- while (++i < (I32)PL_origalen)
- *s++ = '\0';
+ /* Shorter than original, will be padded. */
+ Copy(s, PL_origargv[0], len, char);
+ PL_origargv[0][len] = 0;
+ memset(PL_origargv[0] + len + 1,
+ /* Is the space counterintuitive? Yes.
+ * (You were expecting \0?)
+ * Does it work? Seems to. (In Linux 2.4.20 at least.)
+ * --jhi */
+ (int)' ',
+ PL_origalen - len - 1);
for (i = 1; i < PL_origargc; i++)
- PL_origargv[i] = Nullch;
+ PL_origargv[i] = 0;
}
UNLOCK_DOLLARZERO_MUTEX;
break;
{
register char **sigv;
- for (sigv = PL_sig_name+1; *sigv; sigv++)
+ for (sigv = PL_sig_name; *sigv; sigv++)
if (strEQ(sig,*sigv))
return PL_sig_num[sigv - PL_sig_name];
#ifdef SIGCLD
if (strEQ(sig,"CLD"))
return SIGCHLD;
#endif
- return 0;
+ return -1;
}
#if !defined(PERL_IMPLICIT_CONTEXT)
#else
/* Not clear if this will work */
(void)rsignal(sig, SIG_IGN);
- (void)rsignal(sig, &Perl_csighandler);
+ (void)rsignal(sig, PL_csighandlerp);
#endif
#endif /* !PERL_MICRO */
Perl_die(aTHX_ Nullformat);
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