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Commit | Line | Data |
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6dbe3af9 KZ |
1 | /* |
2 | * ctrlaltdel.c - Set the function of the Ctrl-Alt-Del combination | |
3 | * Created 4-Jul-92 by Peter Orbaek <poe@daimi.aau.dk> | |
b50945d4 | 4 | * 1999-02-22 Arkadiusz MiĆkiewicz <misiek@pld.ORG.PL> |
7eda085c | 5 | * - added Native Language Support |
6dbe3af9 KZ |
6 | */ |
7 | ||
028f7ed8 | 8 | #include <getopt.h> |
6dbe3af9 | 9 | #include <stdio.h> |
66ee8158 | 10 | #include <stdlib.h> |
6dbe3af9 | 11 | #include <string.h> |
0c3e5202 | 12 | #include <errno.h> |
e52b58e6 CTV |
13 | #include <unistd.h> |
14 | #include <sys/reboot.h> | |
7eda085c | 15 | #include "nls.h" |
eb76ca98 | 16 | #include "c.h" |
efb8854f | 17 | #include "closestream.h" |
82cac348 | 18 | #include "pathnames.h" |
741d478e | 19 | #include "path.h" |
6dbe3af9 | 20 | |
e52b58e6 CTV |
21 | #define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF |
22 | #define LINUX_REBOOT_CMD_CAD_OFF 0x00000000 | |
23 | ||
86be6a32 | 24 | static void __attribute__((__noreturn__)) usage(void) |
0c3e5202 | 25 | { |
86be6a32 RM |
26 | FILE *out = stdout; |
27 | fputs(USAGE_HEADER, out); | |
b73142b9 | 28 | fprintf(out, _(" %s hard|soft\n"), program_invocation_short_name); |
451dbcfa | 29 | |
86be6a32 | 30 | fputs(USAGE_SEPARATOR, out); |
8137c98f | 31 | fprintf(out, _("Set the function of the Ctrl-Alt-Del combination.\n")); |
451dbcfa | 32 | |
86be6a32 | 33 | fputs(USAGE_OPTIONS, out); |
f45f3ec3 RM |
34 | printf(USAGE_HELP_OPTIONS(16)); |
35 | printf(USAGE_MAN_TAIL("ctrlaltdel(8)")); | |
86be6a32 | 36 | exit(EXIT_SUCCESS); |
028f7ed8 SK |
37 | } |
38 | ||
82cac348 SK |
39 | static int get_cad(void) |
40 | { | |
741d478e | 41 | uint64_t val = path_read_u64(_PATH_PROC_CTRL_ALT_DEL); |
82cac348 | 42 | |
82cac348 SK |
43 | switch (val) { |
44 | case 0: | |
45 | fputs("soft\n", stdout); | |
46 | break; | |
47 | case 1: | |
48 | fputs("hard\n", stdout); | |
49 | break; | |
50 | default: | |
51 | printf("%s hard\n", _("implicit")); | |
741d478e | 52 | warnx(_("unexpected value in %s: %ju"), _PATH_PROC_CTRL_ALT_DEL, val); |
82cac348 SK |
53 | return EXIT_FAILURE; |
54 | } | |
55 | return EXIT_SUCCESS; | |
56 | } | |
57 | ||
58 | static int set_cad(const char *arg) | |
028f7ed8 | 59 | { |
8137c98f | 60 | unsigned int cmd; |
82cac348 SK |
61 | |
62 | if (geteuid()) { | |
63 | warnx(_("You must be root to set the Ctrl-Alt-Del behavior")); | |
64 | return EXIT_FAILURE; | |
65 | } | |
66 | if (!strcmp("hard", arg)) | |
67 | cmd = LINUX_REBOOT_CMD_CAD_ON; | |
68 | else if (!strcmp("soft", arg)) | |
69 | cmd = LINUX_REBOOT_CMD_CAD_OFF; | |
70 | else { | |
71 | warnx(_("unknown argument: %s"), arg); | |
72 | return EXIT_FAILURE; | |
73 | } | |
e52b58e6 | 74 | if (reboot(cmd) < 0) { |
82cac348 SK |
75 | warnx("reboot"); |
76 | return EXIT_FAILURE; | |
77 | } | |
78 | return EXIT_SUCCESS; | |
79 | } | |
80 | ||
81 | int main(int argc, char **argv) | |
82 | { | |
83 | int ch, ret; | |
028f7ed8 SK |
84 | static const struct option longopts[] = { |
85 | {"version", no_argument, NULL, 'V'}, | |
86 | {"help", no_argument, NULL, 'h'}, | |
87 | {NULL, 0, NULL, 0} | |
88 | }; | |
89 | ||
7eda085c KZ |
90 | setlocale(LC_ALL, ""); |
91 | bindtextdomain(PACKAGE, LOCALEDIR); | |
92 | textdomain(PACKAGE); | |
efb8854f | 93 | atexit(close_stdout); |
6dbe3af9 | 94 | |
028f7ed8 SK |
95 | while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1) |
96 | switch (ch) { | |
97 | case 'V': | |
98 | printf(UTIL_LINUX_VERSION); | |
99 | return EXIT_SUCCESS; | |
100 | case 'h': | |
86be6a32 | 101 | usage(); |
028f7ed8 | 102 | default: |
677ec86c | 103 | errtryhelp(EXIT_FAILURE); |
028f7ed8 SK |
104 | } |
105 | ||
8137c98f | 106 | if (argc < 2) |
82cac348 | 107 | ret = get_cad(); |
8137c98f | 108 | else |
82cac348 SK |
109 | ret = set_cad(argv[1]); |
110 | return ret; | |
0c3e5202 | 111 | } |