Contents of /trunk/mkinitrd-magellan/busybox/coreutils/nohup.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1529 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 | } |