Contents of /trunk/mkinitrd-magellan/busybox/coreutils/nice.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 1339 byte(s)
Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 1339 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 | /* |
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 | #include "busybox.h" |
12 | |
13 | int nice_main(int argc, char **argv) |
14 | { |
15 | int old_priority, adjustment; |
16 | |
17 | old_priority = getpriority(PRIO_PROCESS, 0); |
18 | |
19 | if (!*++argv) { /* No args, so (GNU) output current nice value. */ |
20 | printf("%d\n", old_priority); |
21 | fflush_stdout_and_exit(EXIT_SUCCESS); |
22 | } |
23 | |
24 | adjustment = 10; /* Set default adjustment. */ |
25 | |
26 | if (argv[0][0] == '-') { |
27 | if (argv[0][1] == 'n') { /* -n */ |
28 | if (argv[0][2]) { /* -nNNNN (w/o space) */ |
29 | argv[0] += 2; argv--; argc++; |
30 | } |
31 | } else { /* -NNN (NNN may be negative) == -n NNN */ |
32 | argv[0] += 1; argv--; argc++; |
33 | } |
34 | if (argc < 4) { /* Missing priority and/or utility! */ |
35 | bb_show_usage(); |
36 | } |
37 | adjustment = xatoi_range(argv[1], INT_MIN/2, INT_MAX/2); |
38 | argv += 2; |
39 | } |
40 | |
41 | { /* Set our priority. */ |
42 | int prio = old_priority + adjustment; |
43 | |
44 | if (setpriority(PRIO_PROCESS, 0, prio) < 0) { |
45 | bb_perror_msg_and_die("setpriority(%d)", prio); |
46 | } |
47 | } |
48 | |
49 | execvp(*argv, argv); /* Now exec the desired program. */ |
50 | |
51 | /* The exec failed... */ |
52 | xfunc_error_retval = (errno == ENOENT) ? 127 : 126; /* SUSv3 */ |
53 | bb_perror_msg_and_die("%s", *argv); |
54 | } |