source: branches/3.2/mindi-busybox/miscutils/runlevel.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 1.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Prints out the previous and the current runlevel.
4 *
5 * Version: @(#)runlevel  1.20  16-Apr-1997  MvS
6 *
7 * This file is part of the sysvinit suite,
8 * Copyright 1991-1997 Miquel van Smoorenburg.
9 *
10 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
11 *
12 * initially busyboxified by Bernhard Reutner-Fischer
13 */
14
15//usage:#define runlevel_trivial_usage
16//usage:       "[FILE]"
17//usage:#define runlevel_full_usage "\n\n"
18//usage:       "Find the current and previous system runlevel\n"
19//usage:       "\n"
20//usage:       "If no utmp FILE exists or if no runlevel record can be found,\n"
21//usage:       "print \"unknown\""
22//usage:
23//usage:#define runlevel_example_usage
24//usage:       "$ runlevel /var/run/utmp\n"
25//usage:       "N 2"
26
27#include "libbb.h"
28
29int runlevel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
30int runlevel_main(int argc UNUSED_PARAM, char **argv)
31{
32    struct utmp *ut;
33    char prev;
34
35    if (argv[1]) utmpname(argv[1]);
36
37    setutent();
38    while ((ut = getutent()) != NULL) {
39        if (ut->ut_type == RUN_LVL) {
40            prev = ut->ut_pid / 256;
41            if (prev == 0) prev = 'N';
42            printf("%c %c\n", prev, ut->ut_pid % 256);
43            if (ENABLE_FEATURE_CLEAN_UP)
44                endutent();
45            return 0;
46        }
47    }
48
49    puts("unknown");
50
51    if (ENABLE_FEATURE_CLEAN_UP)
52        endutent();
53    return 1;
54}
Note: See TracBrowser for help on using the repository browser.