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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
commitcfe5e3905201349e9cf3f95d52ff4bd100bde37d (patch)
treed0baf160cbee3195249d095f85e52d20c21acf02 /sys-utils/ctrlaltdel.c
parentInitial commit. (diff)
downloadutil-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.tar.xz
util-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.zip
Adding upstream version 2.39.3.upstream/2.39.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sys-utils/ctrlaltdel.c')
-rw-r--r--sys-utils/ctrlaltdel.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/sys-utils/ctrlaltdel.c b/sys-utils/ctrlaltdel.c
new file mode 100644
index 0000000..303d2dc
--- /dev/null
+++ b/sys-utils/ctrlaltdel.c
@@ -0,0 +1,113 @@
+/*
+ * ctrlaltdel.c - Set the function of the Ctrl-Alt-Del combination
+ * Created 4-Jul-92 by Peter Orbaek <poe@daimi.aau.dk>
+ * 1999-02-22 Arkadiusz Miƛkiewicz <misiek@pld.ORG.PL>
+ * - added Native Language Support
+ */
+
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/reboot.h>
+#include "nls.h"
+#include "c.h"
+#include "closestream.h"
+#include "pathnames.h"
+#include "path.h"
+
+#define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF
+#define LINUX_REBOOT_CMD_CAD_OFF 0x00000000
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ fputs(USAGE_HEADER, out);
+ fprintf(out, _(" %s hard|soft\n"), program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fprintf(out, _("Set the function of the Ctrl-Alt-Del combination.\n"));
+
+ fputs(USAGE_OPTIONS, out);
+ printf(USAGE_HELP_OPTIONS(16));
+ printf(USAGE_MAN_TAIL("ctrlaltdel(8)"));
+ exit(EXIT_SUCCESS);
+}
+
+static int get_cad(void)
+{
+ uint64_t val;
+
+ if (ul_path_read_u64(NULL, &val, _PATH_PROC_CTRL_ALT_DEL) != 0)
+ err(EXIT_FAILURE, _("cannot read %s"), _PATH_PROC_CTRL_ALT_DEL);
+
+ switch (val) {
+ case 0:
+ fputs("soft\n", stdout);
+ break;
+ case 1:
+ fputs("hard\n", stdout);
+ break;
+ default:
+ printf("%s hard\n", _("implicit"));
+ warnx(_("unexpected value in %s: %ju"), _PATH_PROC_CTRL_ALT_DEL, val);
+ return EXIT_FAILURE;
+ }
+ return EXIT_SUCCESS;
+}
+
+static int set_cad(const char *arg)
+{
+ unsigned int cmd;
+
+ if (geteuid()) {
+ warnx(_("You must be root to set the Ctrl-Alt-Del behavior"));
+ return EXIT_FAILURE;
+ }
+ if (!strcmp("hard", arg))
+ cmd = LINUX_REBOOT_CMD_CAD_ON;
+ else if (!strcmp("soft", arg))
+ cmd = LINUX_REBOOT_CMD_CAD_OFF;
+ else {
+ warnx(_("unknown argument: %s"), arg);
+ return EXIT_FAILURE;
+ }
+ if (reboot(cmd) < 0) {
+ warn("reboot");
+ return EXIT_FAILURE;
+ }
+ return EXIT_SUCCESS;
+}
+
+int main(int argc, char **argv)
+{
+ int ch, ret;
+ static const struct option longopts[] = {
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, 0}
+ };
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1)
+ switch (ch) {
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ case 'h':
+ usage();
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+
+ if (argc < 2)
+ ret = get_cad();
+ else
+ ret = set_cad(argv[1]);
+ return ret;
+}