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 "libbb.h"
|
---|
14 |
|
---|
15 | int nohup_main(int argc, char **argv);
|
---|
16 | int nohup_main(int argc, char **argv)
|
---|
17 | {
|
---|
18 | int nullfd;
|
---|
19 | const char *nohupout;
|
---|
20 | char *home = NULL;
|
---|
21 |
|
---|
22 | xfunc_error_retval = 127;
|
---|
23 |
|
---|
24 | if (argc < 2) bb_show_usage();
|
---|
25 |
|
---|
26 | nullfd = xopen(bb_dev_null, O_WRONLY|O_APPEND);
|
---|
27 | /* If stdin is a tty, detach from it. */
|
---|
28 | if (isatty(STDIN_FILENO))
|
---|
29 | dup2(nullfd, STDIN_FILENO);
|
---|
30 |
|
---|
31 | nohupout = "nohup.out";
|
---|
32 | /* Redirect stdout to nohup.out, either in "." or in "$HOME". */
|
---|
33 | if (isatty(STDOUT_FILENO)) {
|
---|
34 | close(STDOUT_FILENO);
|
---|
35 | if (open(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR) < 0) {
|
---|
36 | home = getenv("HOME");
|
---|
37 | if (home) {
|
---|
38 | nohupout = concat_path_file(home, nohupout);
|
---|
39 | xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);
|
---|
40 | }
|
---|
41 | }
|
---|
42 | } else dup2(nullfd, STDOUT_FILENO);
|
---|
43 |
|
---|
44 | /* If we have a tty on stderr, announce filename and redirect to stdout.
|
---|
45 | * Else redirect to /dev/null.
|
---|
46 | */
|
---|
47 | if (isatty(STDERR_FILENO)) {
|
---|
48 | bb_error_msg("appending to %s", nohupout);
|
---|
49 | dup2(STDOUT_FILENO, STDERR_FILENO);
|
---|
50 | } else dup2(nullfd, STDERR_FILENO);
|
---|
51 |
|
---|
52 | if (nullfd > 2)
|
---|
53 | close(nullfd);
|
---|
54 | signal(SIGHUP, SIG_IGN);
|
---|
55 |
|
---|
56 | BB_EXECVP(argv[1], argv+1);
|
---|
57 | if (ENABLE_FEATURE_CLEAN_UP && home)
|
---|
58 | free((char*)nohupout);
|
---|
59 | bb_perror_msg_and_die("%s", argv[1]);
|
---|
60 | }
|
---|