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Importing usr.bin/nohup

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Replaces commands/nohup. No Minix-specific changes needed.

Change-Id: I2fb7c387833a8898cf30fc3ac25ea53ee1031bd1
This commit is contained in:
Thomas Cort 2013-10-12 10:46:34 -04:00
parent 4890bd9dce
commit 982405fef1
10 changed files with 267 additions and 167 deletions
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2
commands/Makefile
View file

@ -16,7 +16,7 @@ SUBDIR= add_route arp ash at backup btrace \
less loadkeys loadramdisk logger look lp \
lpd lspci mail MAKEDEV \
mesg mined mkfifo \
mount mt netconf nohup \
mount mt netconf \
nonamed od paste patch \
ping postinstall poweroff pr prep printroot \
profile progressbar pr_routes ps pwdauth \

4
commands/nohup/Makefile
View file

@ -1,4 +0,0 @@
PROG= nohup
MAN=
.include <bsd.prog.mk>

141
commands/nohup/nohup.c
View file

@ -1,141 +0,0 @@
/*
* Copyright (c) 2009, Erik van der Kouwe
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Functionality implemented according to this specification:
* http://www.opengroup.org/onlinepubs/000095399/utilities/nohup.html
*/
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#define NOHUP_OUT_FILENAME "nohup.out"
static void print_usage(const char *argv0)
{
printf("Usage: %s command [arg...]\n", argv0);
}
static int redirect_tty(void)
{
int fd;
char buffer[PATH_MAX + 1], *home;
/* redirect stdout to a file if needed */
if (isatty(STDOUT_FILENO))
{
/* first try: current directory */
fd = open(NOHUP_OUT_FILENAME, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
if (fd < 0)
{
/* alternative: home directory */
home = getenv("HOME");
if (home)
{
snprintf(buffer, sizeof(buffer), "%s/%s", home, NOHUP_OUT_FILENAME);
buffer[sizeof(buffer) - 1] = 0;
fd = open(buffer, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
}
}
if (fd < 0)
{
perror("cannot create " NOHUP_OUT_FILENAME " and $HOME/" NOHUP_OUT_FILENAME);
return -1;
}
/* move the fd to stdout */
if (dup2(fd, STDOUT_FILENO) < 0 || close(fd) < 0)
{
perror("cannot redirect stdout");
return -1;
}
}
/* redirect stderr to stdout if needed */
if (isatty(STDERR_FILENO))
{
if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0)
{
perror("cannot redirect stderr");
return -1;
}
}
return 0;
}
int main(int argc, char **argv)
{
struct sigaction sa;
/* check parameters */
if (argc < 2)
{
print_usage(argv[0]);
return 127;
}
/* ignore SIGHUP */
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGHUP, &sa, NULL) < 0)
{
perror("cannot ignore SIGHUP");
return 127;
}
/* redirect TTY input and output */
if (redirect_tty() < 0)
return 127;
/* run the command */
execvp(argv[1], argv + 1);
perror("cannot execute");
/* exit code depends on whether the utility was found */
switch (errno)
{
case ELOOP:
case ENAMETOOLONG:
case ENOENT:
case ENOTDIR:
/* utility not found */
return 127;
default:
/* exec failed for other reason */
return 126;
}
}

2
man/man1/Makefile
View file

@ -11,7 +11,7 @@ MAN= ash.1 at.1 \
last.1 loadfont.1 loadkeys.1 logger.1 \
look.1 lp.1 lspci.1 mail.1 \
mesg.1 mixer.1 \
mkproto.1 mount.1 mt.1 nohup.1 od.1 \
mkproto.1 mount.1 mt.1 od.1 \
paste.1 ping.1 playwave.1 pr.1 prep.1 \
profile.1 ps.1 rcp.1 recwave.1 \
remsync.1 rget.1 rlogin.1 rsh.1 rz.1 \

19
man/man1/nohup.1
View file

@ -1,19 +0,0 @@
.TH NOHUP 1
.SH NAME
nohup \- ignore hangup signal
.SH SYNOPSIS
\fBnohup\fP \fIutility\fP [\fIargument\fP...]
.SH DESCRIPTION
The
.B nohup
utility runs \fIutility\fP while ignoring the SIGHUP signal. This
allows the process to continue running after the current terminal
exits, for example when logging off a telnet session.
Unless output is explicitly redirected when invoking nohup, output is
appended to a file named nohup.out. This file is created in the current
directory or, if this is not possible, in $HOME. If the standard error
stream is not explicitly redirected, it is sent to the standard output.
.SH AUTHOR
This manual page and the utility were written by Erik van der Kouwe
<vdkouwe@cs.vu.nl>.

1
releasetools/nbsd_ports
View file

@ -179,6 +179,7 @@
2009/08/15 20:44:56,usr.bin/mktemp
2012/10/17 12:00:00,usr.bin/nbperf
2013/10/10 12:00:00,usr.bin/nice
2013/10/12 12:00:00,usr.bin/nohup
2012/10/17 12:00:00,usr.bin/nvi
2010/05/14 17:28:23,usr.bin/newgrp
2012/10/17 12:00:00,usr.bin/passwd

2
usr.bin/Makefile
View file

@ -18,7 +18,7 @@ SUBDIR= \
machine make man \
mkdep mktemp \
\
nbperf newgrp nice nvi \
nbperf newgrp nice nohup nvi \
passwd \
printf \
rev \

6
usr.bin/nohup/Makefile Normal file
View file

@ -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>

115
usr.bin/nohup/nohup.1 Normal file
View file

@ -0,0 +1,115 @@
.\" $NetBSD: nohup.1,v 1.15 2012/03/29 18:33:19 wiz 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. 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 July 15, 2005
.Dt NOHUP 1
.Os
.Sh NAME
.Nm nohup
.Nd invoke a command immune to hangups
.Sh SYNOPSIS
.Nm
.Ar utility
.Op Ar arg ...
.Sh DESCRIPTION
The
.Nm
command allows the specified utility to be protected from termination
if the user should become logged out
(for example, due to a modem line or TCP/IP connection being dropped).
To do this,
.Nm
sets the
.Dv SIGHUP
.Xr signal 3
.Pq Dq terminal line hangup
to be ignored,
then executes
.Ar utility
along with any arguments.
.Pp
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.
If the output file
.Pa nohup.out
cannot be created in the current directory,
.Nm
attempts to create the file in the user's home directory.
If the file
.Pa nohup.out
cannot be created,
either in the current directory or the user's home directory,
.Nm
will exit without invoking
.Ar utility ,
with an exit value as described below.
.Sh ENVIRONMENT
The following variable is used by
.Nm :
.Bl -tag -width flag
.It Ev HOME
User's home directory.
.El
.Sh EXIT STATUS
The
.Nm
utility exits 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 .
.El
.Pp
Otherwise, the exit status of
.Nm
will be that of
.Ar utility .
.Sh SEE ALSO
.Xr signal 3
.Sh STANDARDS
The
.Nm
command is expected to be
.St -p1003.2
compatible.

142
usr.bin/nohup/nohup.c Normal file
View file

@ -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);
}