--- Libc/Libc-1725.40.4/stdlib/FreeBSD/system.c
+++ Libc/Libc-391/stdlib/FreeBSD/system.c
@@ -10,6 +10,10 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
@@ -27,14 +31,11 @@
  * SUCH DAMAGE.
  */
 
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wstrict-prototypes"
-
 #if defined(LIBC_SCCS) && !defined(lint)
 static char sccsid[] = "@(#)system.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdlib/system.c,v 1.11 2007/01/09 00:28:10 imp Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/stdlib/system.c,v 1.10 2002/03/22 21:53:10 obrien Exp $");
 
 #include "namespace.h"
 #include <sys/types.h>
@@ -43,70 +44,23 @@
 #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"
 
-#include <crt_externs.h>
-#define environ (*_NSGetEnviron())
-
-#include <TargetConditionals.h>
-
-#if __DARWIN_UNIX03
-#include <pthread.h>
-
-#if !(TARGET_OS_IPHONE && (TARGET_OS_SIMULATOR || !TARGET_OS_IOS))
-static pthread_mutex_t __systemfn_mutex = PTHREAD_MUTEX_INITIALIZER;
-#endif
-extern int __unix_conforming;
-#endif /* __DARWIN_UNIX03 */
-
 int
 __system(command)
 	const char *command;
 {
-#if TARGET_OS_IPHONE && (TARGET_OS_SIMULATOR || !TARGET_OS_IOS)
-	// Don't abort() on iOS for now
-	LIBC_ABORT("system() is not supported on this platform.");
-#else
 	pid_t pid, savedpid;
-	int pstat, err;
+	int pstat;
 	struct sigaction ign, intact, quitact;
-	sigset_t newsigblock, oldsigblock, defaultsig;
-	posix_spawnattr_t attr;
-	short flags = POSIX_SPAWN_SETSIGMASK;
-	const char *argv[] = {"sh", "-c", command, NULL};
+	sigset_t newsigblock, oldsigblock;
 
-#if __DARWIN_UNIX03
-	if (__unix_conforming == 0)
-		__unix_conforming = 1;
-#ifdef VARIANT_CANCELABLE
-	pthread_testcancel();
-#endif /* VARIANT_CANCELABLE */
-#endif /* __DARWIN_UNIX03 */
+	if (!command)		/* just checking... */
+		return(1);
 
-	if (!command) {		/* just checking... */
-#if TARGET_OS_IPHONE
-		return(0);
-#else
-		if (access(_PATH_BSHELL, F_OK) == -1)	/* if no sh or no access */
-			return(0);
-		else
-			return(1);
-#endif
-	}
-
-	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.
@@ -115,49 +69,34 @@
 	(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);
-	(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) {
+	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 */
 		savedpid = pid;
 		do {
 			pid = _wait4(savedpid, &pstat, 0, (struct rusage *)0);
 		} while (pid == -1 && errno == EINTR);
-		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 */
+		break;
 	}
-
 	(void)_sigaction(SIGINT, &intact, NULL);
 	(void)_sigaction(SIGQUIT,  &quitact, NULL);
 	(void)_sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
-#if __DARWIN_UNIX03
-	pthread_mutex_unlock(&__systemfn_mutex);
-#endif /* __DARWIN_UNIX03 */
-	return(pstat);
-#endif /* TARGET_OS_IPHONE && (TARGET_OS_SIMULATOR || !TARGET_OS_IOS) */
+	return(pid == -1 ? -1 : pstat);
 }
 
 __weak_reference(__system, system);
 __weak_reference(__system, _system);
-
-#pragma clang diagnostic pop