61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/* nohup - invoke a utility immune to hangups.
|
|
*
|
|
* Busybox version based on nohup specification at
|
|
* http://www.opengroup.org/onlinepubs/007904975/utilities/nohup.html
|
|
*
|
|
* Copyright 2006 Rob Landley <rob@landley.net>
|
|
* Copyright 2006 Bernhard Fischer
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
int nohup_main(int argc, char **argv);
|
|
int nohup_main(int argc, char **argv)
|
|
{
|
|
int nullfd;
|
|
const char *nohupout;
|
|
char *home = NULL;
|
|
|
|
xfunc_error_retval = 127;
|
|
|
|
if (argc < 2) bb_show_usage();
|
|
|
|
nullfd = xopen(bb_dev_null, O_WRONLY|O_APPEND);
|
|
/* If stdin is a tty, detach from it. */
|
|
if (isatty(STDIN_FILENO))
|
|
dup2(nullfd, STDIN_FILENO);
|
|
|
|
nohupout = "nohup.out";
|
|
/* Redirect stdout to nohup.out, either in "." or in "$HOME". */
|
|
if (isatty(STDOUT_FILENO)) {
|
|
close(STDOUT_FILENO);
|
|
if (open(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR) < 0) {
|
|
home = getenv("HOME");
|
|
if (home) {
|
|
nohupout = concat_path_file(home, nohupout);
|
|
xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);
|
|
}
|
|
}
|
|
} else dup2(nullfd, STDOUT_FILENO);
|
|
|
|
/* If we have a tty on stderr, announce filename and redirect to stdout.
|
|
* Else redirect to /dev/null.
|
|
*/
|
|
if (isatty(STDERR_FILENO)) {
|
|
bb_error_msg("appending to %s", nohupout);
|
|
dup2(STDOUT_FILENO, STDERR_FILENO);
|
|
} else dup2(nullfd, STDERR_FILENO);
|
|
|
|
if (nullfd > 2)
|
|
close(nullfd);
|
|
signal(SIGHUP, SIG_IGN);
|
|
|
|
BB_EXECVP(argv[1], argv+1);
|
|
if (ENABLE_FEATURE_CLEAN_UP && home)
|
|
free((char*)nohupout);
|
|
bb_simple_perror_msg_and_die(argv[1]);
|
|
}
|