Annotation of /trunk/mkinitrd-magellan/busybox/coreutils/nohup.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 2102 byte(s)
-updated to busybox-1.13.4
1 | niro | 532 | /* 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 | niro | 816 | * Copyright 2006 Bernhard Reutner-Fischer |
9 | niro | 532 | * |
10 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
11 | */ | ||
12 | |||
13 | niro | 816 | #include "libbb.h" |
14 | niro | 532 | |
15 | niro | 816 | /* Compat info: nohup (GNU coreutils 6.8) does this: |
16 | # nohup true | ||
17 | nohup: ignoring input and appending output to `nohup.out' | ||
18 | # nohup true 1>/dev/null | ||
19 | nohup: ignoring input and redirecting stderr to stdout | ||
20 | # nohup true 2>zz | ||
21 | # cat zz | ||
22 | nohup: ignoring input and appending output to `nohup.out' | ||
23 | # nohup true 2>zz 1>/dev/null | ||
24 | # cat zz | ||
25 | nohup: ignoring input | ||
26 | # nohup true </dev/null 1>/dev/null | ||
27 | nohup: redirecting stderr to stdout | ||
28 | # nohup true </dev/null 2>zz 1>/dev/null | ||
29 | # cat zz | ||
30 | (nothing) | ||
31 | # | ||
32 | */ | ||
33 | |||
34 | int nohup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; | ||
35 | niro | 532 | int nohup_main(int argc, char **argv) |
36 | { | ||
37 | niro | 816 | const char *nohupout; |
38 | char *home; | ||
39 | niro | 532 | |
40 | xfunc_error_retval = 127; | ||
41 | |||
42 | niro | 816 | if (argc < 2) bb_show_usage(); |
43 | niro | 532 | |
44 | /* If stdin is a tty, detach from it. */ | ||
45 | niro | 816 | if (isatty(STDIN_FILENO)) { |
46 | /* bb_error_msg("ignoring input"); */ | ||
47 | close(STDIN_FILENO); | ||
48 | xopen(bb_dev_null, O_RDONLY); /* will be fd 0 (STDIN_FILENO) */ | ||
49 | } | ||
50 | niro | 532 | |
51 | nohupout = "nohup.out"; | ||
52 | /* Redirect stdout to nohup.out, either in "." or in "$HOME". */ | ||
53 | if (isatty(STDOUT_FILENO)) { | ||
54 | close(STDOUT_FILENO); | ||
55 | if (open(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR) < 0) { | ||
56 | home = getenv("HOME"); | ||
57 | if (home) { | ||
58 | nohupout = concat_path_file(home, nohupout); | ||
59 | xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR); | ||
60 | niro | 816 | } else { |
61 | xopen(bb_dev_null, O_RDONLY); /* will be fd 1 */ | ||
62 | niro | 532 | } |
63 | } | ||
64 | niro | 816 | bb_error_msg("appending output to %s", nohupout); |
65 | } | ||
66 | niro | 532 | |
67 | niro | 816 | /* If we have a tty on stderr, redirect to stdout. */ |
68 | if (isatty(STDERR_FILENO)) { | ||
69 | /* if (stdout_wasnt_a_tty) | ||
70 | bb_error_msg("redirecting stderr to stdout"); */ | ||
71 | dup2(STDOUT_FILENO, STDERR_FILENO); | ||
72 | } | ||
73 | niro | 532 | |
74 | niro | 816 | signal(SIGHUP, SIG_IGN); |
75 | |||
76 | BB_EXECVP(argv[1], argv+1); | ||
77 | bb_simple_perror_msg_and_die(argv[1]); | ||
78 | niro | 532 | } |