Import unmodified NetBSD libc in trunk

This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00
parent 43d1edf88c
commit b6cbf7203b
3215 changed files with 401041 additions and 0 deletions
--- a/lib/nbsd_libc/stdlib/system.c
+++ b/lib/nbsd_libc/stdlib/system.c
@@ -0,0 +1,122 @@
+/*	$NetBSD: system.c,v 1.23 2010/11/14 18:11:43 tron Exp $	*/
+
+/*
+ * 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.
+ * 3. 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.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)system.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: system.c,v 1.23 2010/11/14 18:11:43 tron Exp $");
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <paths.h>
+
+#include "env.h"
+#include "reentrant.h"
+
+int
+system(command)
+	const char *command;
+{
+	pid_t pid;
+	struct sigaction intsa, quitsa, sa;
+	sigset_t nmask, omask;
+	int pstat;
+	const char *argp[] = {"sh", "-c", NULL, NULL};
+	argp[2] = command;
+
+	/*
+	 * ISO/IEC 9899:1999 in 7.20.4.6 describes this special case.
+	 * We need to check availability of a command interpreter.
+	 */
+	if (command == NULL) {
+		if (access(_PATH_BSHELL, X_OK) == 0)
+			return 1;
+		return 0;
+	}
+
+	sa.sa_handler = SIG_IGN;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;
+
+	if (sigaction(SIGINT, &sa, &intsa) == -1)
+		return -1;
+	if (sigaction(SIGQUIT, &sa, &quitsa) == -1) {
+		sigaction(SIGINT, &intsa, NULL);
+		return -1;
+	}
+
+	sigemptyset(&nmask);
+	sigaddset(&nmask, SIGCHLD);
+	if (sigprocmask(SIG_BLOCK, &nmask, &omask) == -1) {
+		sigaction(SIGINT, &intsa, NULL);
+		sigaction(SIGQUIT, &quitsa, NULL);
+		return -1;
+	}
+
+	(void)__readlockenv();
+	switch(pid = vfork()) {
+	case -1:			/* error */
+		(void)__unlockenv();
+		sigaction(SIGINT, &intsa, NULL);
+		sigaction(SIGQUIT, &quitsa, NULL);
+		(void)sigprocmask(SIG_SETMASK, &omask, NULL);
+		return -1;
+	case 0:				/* child */
+		sigaction(SIGINT, &intsa, NULL);
+		sigaction(SIGQUIT, &quitsa, NULL);
+		(void)sigprocmask(SIG_SETMASK, &omask, NULL);
+		execve(_PATH_BSHELL, __UNCONST(argp), environ);
+		_exit(127);
+	}
+	(void)__unlockenv();
+
+	while (waitpid(pid, &pstat, 0) == -1) {
+		if (errno != EINTR) {
+			pstat = -1;
+			break;
+		}
+	}
+
+	sigaction(SIGINT, &intsa, NULL);
+	sigaction(SIGQUIT, &quitsa, NULL);
+	(void)sigprocmask(SIG_SETMASK, &omask, NULL);
+
+	return (pstat);
+}