initial population

1 files changed, 142 insertions, 0 deletions

diff --git a/usr.bin/nohup/nohup.c b/usr.bin/nohup/nohup.c
new file mode 100644
index 0000000..d177c51
--- /dev/null
+++ b/usr.bin/nohup/nohup.c
@@ -0,0 +1,142 @@
+/*	$NetBSD: nohup.c,v 1.15 2011/09/06 18:24:15 joerg Exp $	*/
+
+/*
+ * Copyright (c) 1989 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>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1989\
+ The Regents of the University of California.  All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)nohup.c	5.4 (Berkeley) 6/1/90";
+#endif
+__RCSID("$NetBSD: nohup.c,v 1.15 2011/09/06 18:24:15 joerg Exp $");
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+static void dofile(void);
+__dead static void usage(void);
+
+/* nohup shall exit with one of the following values:
+   126 - The utility was found but could not be invoked.
+   127 - An error occurred in the nohup utility, or the utility could
+         not be found. */
+#define EXIT_NOEXEC	126
+#define EXIT_NOTFOUND	127
+#define EXIT_MISC	127
+
+int
+main(int argc, char **argv)
+{
+	int exit_status;
+
+	while (getopt(argc, argv, "") != -1) {
+		usage();
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1)
+		usage();
+
+	if (isatty(STDOUT_FILENO))
+		dofile();
+	if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) == -1) {
+		/* may have just closed stderr */
+		(void)fprintf(stdin, "nohup: %s\n", strerror(errno));
+		exit(EXIT_MISC);
+	}
+
+	/* The nohup utility shall take the standard action for all signals
+	   except that SIGHUP shall be ignored. */
+	(void)signal(SIGHUP, SIG_IGN);
+
+	execvp(argv[0], &argv[0]);
+	exit_status = (errno == ENOENT) ? EXIT_NOTFOUND : EXIT_NOEXEC;
+	(void)fprintf(stderr, "nohup: %s: %s\n", argv[0], strerror(errno));
+	exit(exit_status);
+}
+
+static void
+dofile(void)
+{
+	int fd;
+	char path[MAXPATHLEN];
+	const char *p;
+
+	/* If the standard output is a terminal, all output written to 
+	   its standard output shall be appended to the end of the file
+	   nohup.out in the current directory.  If nohup.out cannot be
+	   created or opened for appending, the output shall be appended
+	   to the end of the file nohup.out in the directory specified 
+	   by the HOME environment variable.
+
+	   If a file is created, the file's permission bits shall be
+	   set to S_IRUSR | S_IWUSR. */
+#define	FILENAME	"nohup.out"
+	p = FILENAME;
+	if ((fd = open(p, O_RDWR|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR)) >= 0)
+		goto dupit;
+	if ((p = getenv("HOME")) != NULL) {
+		(void)strlcpy(path, p, sizeof(path));
+		(void)strlcat(path, "/", sizeof(path));
+		(void)strlcat(path, FILENAME, sizeof(path));
+		if ((fd = open(p = path, O_RDWR|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR)) >= 0)
+			goto dupit;
+	}
+	(void)fprintf(stderr, "nohup: can't open a nohup.out file.\n");
+	exit(EXIT_MISC);
+
+dupit:	(void)lseek(fd, 0L, SEEK_END);
+	if (dup2(fd, STDOUT_FILENO) == -1) {
+		(void)fprintf(stderr, "nohup: %s\n", strerror(errno));
+		exit(EXIT_MISC);
+	}
+	(void)fprintf(stderr, "sending output to %s\n", p);
+}
+
+static void
+usage(void)
+{
+	(void)fprintf(stderr, "usage: nohup utility [argument ...]\n");
+	exit(EXIT_MISC);
+}