Remove bad advice : -M doesn't work on the #! line

[p5sagit/p5-mst-13.2.git] / util.c

diff --git a/util.c b/util.c
index 35d54c3..7355b96 100644 (file)
--- a/util.c
+++ b/util.c
@@ -752,7 +752,7 @@ Perl_fbm_instr(pTHX_ unsigned char *big, register unsigned char *bigend, SV *lit
 
 /* 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.
@@ -1594,6 +1594,11 @@ Perl_vwarner(pTHX_ U32  err, const char* pat, va_list* args)
 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? */
@@ -1652,6 +1657,7 @@ Perl_my_setenv(pTHX_ char *nam, char *val)
     (void)putenv(new_env);
 #   endif /* __CYGWIN__ */
 #endif  /* PERL_USE_SAFE_PUTENV */
+  }
 }
 
 #else /* WIN32 || NETWARE */
@@ -1956,6 +1962,7 @@ Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
     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]);
@@ -1970,8 +1977,6 @@ Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
 #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]);
@@ -1984,7 +1989,11 @@ Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
        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
@@ -2006,8 +2015,6 @@ Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
     }
     /* 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 */
@@ -2016,6 +2023,9 @@ Perl_my_popen_list(pTHX_ char *mode, int n, SV **args)
        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;
@@ -2090,6 +2100,7 @@ Perl_my_popen(pTHX_ char *cmd, char *mode)
     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]);
@@ -2107,7 +2118,6 @@ Perl_my_popen(pTHX_ char *cmd, char *mode)
 #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)
@@ -2117,7 +2127,11 @@ Perl_my_popen(pTHX_ char *cmd, char *mode)
        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)
@@ -2151,8 +2165,7 @@ Perl_my_popen(pTHX_ char *cmd, char *mode)
 #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]) {
@@ -2160,6 +2173,9 @@ Perl_my_popen(pTHX_ char *cmd, char *mode)
        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;
@@ -2333,6 +2349,12 @@ 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;
@@ -2367,6 +2389,12 @@ 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;
@@ -2385,6 +2413,12 @@ Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *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);
 }
 
@@ -2393,6 +2427,12 @@ Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save)
 Sighandler_t
 Perl_rsignal(pTHX_ int signo, Sighandler_t handler)
 {
+#ifdef USE_ITHREADS
+    /* only "parent" interpreter can diddle signals */
+    if (PL_curinterp != aTHX)
+       return SIG_ERR;
+#endif
+
     return PerlProc_signal(signo, handler);
 }
 
@@ -2411,6 +2451,12 @@ Perl_rsignal_state(pTHX_ int signo)
 {
     Sighandler_t oldsig;
 
+#ifdef USE_ITHREADS
+    /* 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);
@@ -2422,6 +2468,11 @@ Perl_rsignal_state(pTHX_ int signo)
 int
 Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save)
 {
+#ifdef USE_ITHREADS
+    /* only "parent" interpreter can diddle signals */
+    if (PL_curinterp != aTHX)
+       return -1;
+#endif
     *save = PerlProc_signal(signo, handler);
     return (*save == SIG_ERR) ? -1 : 0;
 }
@@ -2429,6 +2480,11 @@ Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *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 (PerlProc_signal(signo, *save) == SIG_ERR) ? -1 : 0;
 }
 
@@ -3109,7 +3165,7 @@ Perl_new_struct_thread(pTHX_ struct perl_thread *t)
     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;
@@ -3379,6 +3435,7 @@ Perl_my_fflush_all(pTHX)
     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);
@@ -3446,10 +3503,7 @@ Perl_report_evil_fh(pTHX_ GV *gv, IO *io, I32 op)
     }
 
     if (gv && isGV(gv)) {
-       SV *sv = sv_newmortal();
-       gv_efullname4(sv, gv, Nullch, FALSE);
-        if (SvOK(sv))
-            name = SvPVX(sv);
+       name = GvENAME(gv);
     }
 
     if (op == OP_phoney_OUTPUT_ONLY || op == OP_phoney_INPUT_ONLY) {
@@ -4210,7 +4264,7 @@ S_socketpair_udp (int fd[2]) {
 }
 #endif /*  EMULATE_SOCKETPAIR_UDP */
 
-#if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) 
+#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.