diff options
Diffstat (limited to 'coreutils/nohup.c')
-rw-r--r-- | coreutils/nohup.c | 53 |
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 | |||
15 | int 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 | } | ||