initial import of NetBSD tree

3 files changed, 252 insertions, 0 deletions

diff --git a/usr.bin/nohup/Makefile b/usr.bin/nohup/Makefile
new file mode 100644
index 00000000000..bc1a940e667
--- /dev/null
+++ b/usr.bin/nohup/Makefile
@@ -0,0 +1,6 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+#	$NetBSD: Makefile,v 1.3 1995/08/31 23:35:23 jtc Exp $
+
+PROG=	nohup
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/nohup/nohup.1 b/usr.bin/nohup/nohup.1
new file mode 100644
index 00000000000..f58eb03892e
--- /dev/null
+++ b/usr.bin/nohup/nohup.1
@@ -0,0 +1,105 @@
+.\"	$NetBSD: nohup.1,v 1.5 1995/08/31 23:35:24 jtc Exp $
+.\"
+.\" Copyright (c) 1989, 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.
+.\"
+.\" 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. 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.
+.\"
+.\" 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.
+.\"
+.\"	@(#)nohup.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt NOHUP 1
+.Os
+.Sh NAME
+.Nm nohup
+.Nd invoke a command immune to hangups
+.Sh SYNOPSIS
+.Nm nohup
+.Ar utility
+.Op Ar arg ...
+.Sh DESCRIPTION
+The
+.Nm nohup
+utility invokes
+.Ar command
+with
+its arguments
+and at this time sets the signal
+.Dv SIGHUP
+to be ignored. 
+If the standard output is a terminal, the standard output is
+appended to the file
+.Pa nohup.out
+in the current directory.
+If standard error is a terminal, it is directed to the same place
+as the standard output.
+.Sh ENVIRONMENT
+The following variable is utilized by
+.Nm nohup .
+.Bl -tag -width flag
+.It Ev HOME
+If the output file
+.Pa nohup.out
+cannot be created in the current directory, the
+.Nm nohup
+utility uses the directory named by
+.Ev HOME
+to create the file.
+.El
+.Sh DIAGNOSTICS
+The
+.Nm nohup
+utility shall exit with one of the following values:
+.Bl -tag -width Ds 
+.It 126
+The
+.Ar utility
+was found but could not be invoked.
+.It 127
+The
+.Ar utility
+could not be found or an error occurred in 
+.Nm nohup.
+.El
+.Pp
+Otherwise, the exit status of 
+.Nm nohup
+shall be that of 
+.Ar utility .
+.Sh SEE ALSO
+.Xr signal 3
+.Sh STANDARDS
+The
+.Nm nohup
+command is expected to be
+.St -p1003.2
+compatible.
diff --git a/usr.bin/nohup/nohup.c b/usr.bin/nohup/nohup.c
new file mode 100644
index 00000000000..7d593989fb5
--- /dev/null
+++ b/usr.bin/nohup/nohup.c
@@ -0,0 +1,141 @@
+/*	$NetBSD: nohup.c,v 1.6 1995/08/31 23:35:25 jtc 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. 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.
+ *
+ * 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.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)nohup.c	5.4 (Berkeley) 6/1/90";
+#endif
+static char rcsid[] = "$NetBSD: nohup.c,v 1.6 1995/08/31 23:35:25 jtc 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();
+static void usage();
+
+/* nohup shall exit with one of the following values:
+   126 - The utility was found but could not be invoked.
+   127 - An error occured 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(argc, argv)
+	int argc;
+	char **argv;
+{
+	int exit_status;
+
+	if (argc < 2)
+		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[1], &argv[1]);
+	exit_status = (errno = ENOENT) ? EXIT_NOTFOUND : EXIT_NOEXEC;
+	(void)fprintf(stderr, "nohup: %s: %s\n", argv[1], strerror(errno));
+	exit(exit_status);
+}
+
+static void
+dofile()
+{
+	int fd;
+	char *p, path[MAXPATHLEN];
+
+	/* 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)strcpy(path, p);
+		(void)strcat(path, "/");
+		(void)strcat(path, FILENAME);
+		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)fprintf(stderr, "usage: nohup command\n");
+	exit(EXIT_MISC);
+}