Annotation of /trunk/mkinitrd-magellan/busybox/coreutils/nice.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 2 months ago) by niro
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File size: 1403 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 2 months ago) by niro
File MIME type: text/plain
File size: 1403 byte(s)
-updated to busybox-1.13.4
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * nice implementation for busybox | ||
4 | * | ||
5 | * Copyright (C) 2005 Manuel Novoa III <mjn3@codepoet.org> | ||
6 | * | ||
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
8 | */ | ||
9 | |||
10 | #include <sys/resource.h> | ||
11 | niro | 816 | #include "libbb.h" |
12 | niro | 532 | |
13 | niro | 816 | int nice_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
14 | niro | 532 | int nice_main(int argc, char **argv) |
15 | { | ||
16 | int old_priority, adjustment; | ||
17 | |||
18 | old_priority = getpriority(PRIO_PROCESS, 0); | ||
19 | |||
20 | if (!*++argv) { /* No args, so (GNU) output current nice value. */ | ||
21 | printf("%d\n", old_priority); | ||
22 | fflush_stdout_and_exit(EXIT_SUCCESS); | ||
23 | } | ||
24 | |||
25 | adjustment = 10; /* Set default adjustment. */ | ||
26 | |||
27 | if (argv[0][0] == '-') { | ||
28 | if (argv[0][1] == 'n') { /* -n */ | ||
29 | if (argv[0][2]) { /* -nNNNN (w/o space) */ | ||
30 | argv[0] += 2; argv--; argc++; | ||
31 | } | ||
32 | } else { /* -NNN (NNN may be negative) == -n NNN */ | ||
33 | argv[0] += 1; argv--; argc++; | ||
34 | } | ||
35 | if (argc < 4) { /* Missing priority and/or utility! */ | ||
36 | bb_show_usage(); | ||
37 | } | ||
38 | adjustment = xatoi_range(argv[1], INT_MIN/2, INT_MAX/2); | ||
39 | argv += 2; | ||
40 | } | ||
41 | |||
42 | { /* Set our priority. */ | ||
43 | int prio = old_priority + adjustment; | ||
44 | |||
45 | if (setpriority(PRIO_PROCESS, 0, prio) < 0) { | ||
46 | bb_perror_msg_and_die("setpriority(%d)", prio); | ||
47 | } | ||
48 | } | ||
49 | |||
50 | niro | 816 | BB_EXECVP(*argv, argv); /* Now exec the desired program. */ |
51 | niro | 532 | |
52 | /* The exec failed... */ | ||
53 | xfunc_error_retval = (errno == ENOENT) ? 127 : 126; /* SUSv3 */ | ||
54 | niro | 816 | bb_simple_perror_msg_and_die(*argv); |
55 | niro | 532 | } |