aboutsummaryrefslogtreecommitdiff
path: root/coreutils/nohup.c
diff options
context:
space:
mode:
Diffstat (limited to 'coreutils/nohup.c')
-rw-r--r--coreutils/nohup.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/coreutils/nohup.c b/coreutils/nohup.c
new file mode 100644
index 000000000..21adfc1c3
--- /dev/null
+++ b/coreutils/nohup.c
@@ -0,0 +1,53 @@
1/* vi: set sw=4 ts=4: */
2/* nohup - invoke a utility immune to hangups.
3 *
4 * Busybox version based on nohup specification at
5 * http://www.opengroup.org/onlinepubs/007904975/utilities/nohup.html
6 *
7 * Copyright 2006 Rob Landley <rob@landley.net>
8 * Copyright 2006 Bernhard Fischer
9 *
10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 */
12
13#include "busybox.h"
14
15int nohup_main(int argc, char **argv)
16{
17 int temp, nullfd;
18 char *nohupout, *home = NULL;
19
20 xfunc_error_retval = 127;
21
22 if (argc<2) bb_show_usage();
23
24 nullfd = xopen(bb_dev_null, O_WRONLY|O_APPEND);
25 /* If stdin is a tty, detach from it. */
26 if (isatty(STDIN_FILENO)) dup2(nullfd, STDIN_FILENO);
27
28 nohupout = "nohup.out";
29 /* Redirect stdout to nohup.out, either in "." or in "$HOME". */
30 if (isatty(STDOUT_FILENO)) {
31 close(STDOUT_FILENO);
32 if (open(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR) < 0) {
33 home = getenv("HOME");
34 if (home) {
35 nohupout = concat_path_file(home, nohupout);
36 xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);
37 }
38 }
39 } else dup2(nullfd, STDOUT_FILENO);
40
41 /* If we have a tty on strderr, announce filename and redirect to stdout.
42 * Else redirect to /dev/null.
43 */
44 temp = isatty(STDERR_FILENO);
45 if (temp) bb_error_msg("appending to %s", nohupout);
46 dup2(temp ? STDOUT_FILENO : nullfd, STDERR_FILENO);
47 close(nullfd);
48 signal (SIGHUP, SIG_IGN);
49
50 execvp(argv[1],argv+1);
51 if (00 && ENABLE_FEATURE_CLEAN_UP && home) free(nohupout);
52 bb_perror_msg_and_die("%s", argv[1]);
53}