Libc-594.1.4.tar.gz

[apple/libc.git] / stdlib / FreeBSD / system.c.patch

diff --git a/stdlib/FreeBSD/system.c.patch b/stdlib/FreeBSD/system.c.patch
index 3dceff0f5e2969df98a68733e40fd93580e6fd61..e65ce57ee3e068108251b90d9e87e23773444c33 100644 (file)
--- a/stdlib/FreeBSD/system.c.patch
+++ b/stdlib/FreeBSD/system.c.patch
@@ -1,11 +1,50 @@
---- system.c.orig      2003-05-20 15:23:25.000000000 -0700
-+++ system.c   2004-08-31 12:00:07.000000000 -0700
-@@ -58,8 +58,12 @@
-       struct sigaction ign, intact, quitact;
-       sigset_t newsigblock, oldsigblock;
+--- system.c.orig      2008-08-28 02:12:39.000000000 -0700
++++ system.c   2008-08-28 02:15:08.000000000 -0700
+@@ -44,23 +44,61 @@ __FBSDID("$FreeBSD: src/lib/libc/stdlib/
+ #include <stdlib.h>
+ #include <stddef.h>
+ #include <unistd.h>
++#include <spawn.h>
+ #include <paths.h>
+ #include <errno.h>
+ #include "un-namespace.h"
+ #include "libc_private.h"
  
--      if (!command)           /* just checking... */
--              return(1);
++#include <crt_externs.h>
++#define environ (*_NSGetEnviron())
++
++#if __DARWIN_UNIX03
++#include <pthread.h>
++
++static pthread_mutex_t __systemfn_mutex = PTHREAD_MUTEX_INITIALIZER;
++extern int __unix_conforming;
++#ifdef VARIANT_CANCELABLE
++extern void _pthread_testcancel(pthread_t thread, int isconforming);
++#endif /* VARIANT_CANCELABLE */
++#endif /* __DARWIN_UNIX03 */
++
+ int
+ __system(command)
+       const char *command;
+ {
+       pid_t pid, savedpid;
+-      int pstat;
++      int pstat, err;
+       struct sigaction ign, intact, quitact;
+-      sigset_t newsigblock, oldsigblock;
++      sigset_t newsigblock, oldsigblock, defaultsig;
++      posix_spawnattr_t attr;
++      short flags = POSIX_SPAWN_SETSIGMASK;
++      const char *argv[] = {"sh", "-c", command, NULL};
++
++#if __DARWIN_UNIX03
++      if (__unix_conforming == 0)
++              __unix_conforming = 1;
++#ifdef VARIANT_CANCELABLE
++      _pthread_testcancel(pthread_self(), 1);
++#endif /* VARIANT_CANCELABLE */
++#endif /* __DARWIN_UNIX03 */
++
 +      if (!command) {         /* just checking... */
 +              if (access(_PATH_BSHELL, F_OK) == -1)   /* if no sh or no access */
 +                      return(0);
@@ -13,5 +52,78 @@
 +                      return(1);
 +      }
  
+-      if (!command)           /* just checking... */
+-              return(1);
++      if ((err = posix_spawnattr_init(&attr)) != 0) {
++              errno = err;
++              return -1;
++      }
++      (void)sigemptyset(&defaultsig);
+ 
++#if __DARWIN_UNIX03
++      pthread_mutex_lock(&__systemfn_mutex);
++#endif /* __DARWIN_UNIX03 */
        /*
         * Ignore SIGINT and SIGQUIT, block SIGCHLD. Remember to save
+        * existing signal dispositions.
+@@ -69,33 +107,45 @@ __system(command)
+       (void)sigemptyset(&ign.sa_mask);
+       ign.sa_flags = 0;
+       (void)_sigaction(SIGINT, &ign, &intact);
++      if (intact.sa_handler != SIG_IGN) {
++              sigaddset(&defaultsig, SIGINT);
++              flags |= POSIX_SPAWN_SETSIGDEF;
++      }
+       (void)_sigaction(SIGQUIT, &ign, &quitact);
++      if (quitact.sa_handler != SIG_IGN) {
++              sigaddset(&defaultsig, SIGQUIT);
++              flags |= POSIX_SPAWN_SETSIGDEF;
++      }
+       (void)sigemptyset(&newsigblock);
+       (void)sigaddset(&newsigblock, SIGCHLD);
+       (void)_sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
+-      switch(pid = fork()) {
+-      case -1:                        /* error */
+-              break;
+-      case 0:                         /* child */
+-              /*
+-               * Restore original signal dispositions and exec the command.
+-               */
+-              (void)_sigaction(SIGINT, &intact, NULL);
+-              (void)_sigaction(SIGQUIT,  &quitact, NULL);
+-              (void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
+-              execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL);
+-              _exit(127);
+-      default:                        /* parent */
++      (void)posix_spawnattr_setsigmask(&attr, &oldsigblock);
++      if (flags & POSIX_SPAWN_SETSIGDEF) {
++              (void)posix_spawnattr_setsigdefault(&attr, &defaultsig);
++      }
++      (void)posix_spawnattr_setflags(&attr, flags);
++
++      err = posix_spawn(&pid, _PATH_BSHELL, NULL, &attr, (char *const *)argv, environ);
++      (void)posix_spawnattr_destroy(&attr);
++      if (err == 0) {
+               savedpid = pid;
+               do {
+                       pid = _wait4(savedpid, &pstat, 0, (struct rusage *)0);
+               } while (pid == -1 && errno == EINTR);
+-              break;
++              if (pid == -1) pstat = -1;
++      } else if (err == ENOMEM || err == EAGAIN) { /* as if fork failed */
++              pstat = -1;
++      } else {
++              pstat = W_EXITCODE(127, 0); /* couldn't exec shell */
+       }
++
+       (void)_sigaction(SIGINT, &intact, NULL);
+       (void)_sigaction(SIGQUIT,  &quitact, NULL);
+       (void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
+-      return(pid == -1 ? -1 : pstat);
++#if __DARWIN_UNIX03
++      pthread_mutex_unlock(&__systemfn_mutex);
++#endif /* __DARWIN_UNIX03 */
++      return(pstat);
+ }
+ 
+ __weak_reference(__system, system);