--- /dev/null
+++ Libc/Libc-1353.11.2/stdlib/FreeBSD/system.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 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.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * 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 $");
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#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;
+	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};
+
+#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... */
+#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.
+	 */
+	ign.sa_handler = SIG_IGN;
+	(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) {
+		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 */
+	}
+
+	(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) */
+}
+
+__weak_reference(__system, system);
+__weak_reference(__system, _system);
+
+#pragma clang diagnostic pop