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Diffstat (limited to 'src/rc/openrc-shutdown.c')
-rw-r--r--src/rc/openrc-shutdown.c179
1 files changed, 172 insertions, 7 deletions
diff --git a/src/rc/openrc-shutdown.c b/src/rc/openrc-shutdown.c
index b17a63d8..ab2e7469 100644
--- a/src/rc/openrc-shutdown.c
+++ b/src/rc/openrc-shutdown.c
@@ -25,20 +25,24 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <syslog.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/utsname.h>
+#include "broadcast.h"
#include "einfo.h"
#include "rc.h"
#include "helpers.h"
+#include "rc-misc.h"
#include "_usage.h"
#include "rc-wtmp.h"
const char *applet = NULL;
const char *extraopts = NULL;
-const char *getoptstring = "dDHKpRrsw" getoptstring_COMMON;
+const char *getoptstring = "cdDfFHKpRrsw" getoptstring_COMMON;
const struct option longopts[] = {
+ { "cancel", no_argument, NULL, 'c'},
{ "no-write", no_argument, NULL, 'd'},
{ "dry-run", no_argument, NULL, 'D'},
{ "halt", no_argument, NULL, 'H'},
@@ -51,6 +55,7 @@ const struct option longopts[] = {
longopts_COMMON
};
const char * const longopts_help[] = {
+ "cancel a pending shutdown",
"do not write wtmp record",
"print actions instead of executing them",
"halt the system",
@@ -64,8 +69,12 @@ const char * const longopts_help[] = {
};
const char *usagestring = NULL;
const char *exclusive = "Select one of "
-"--halt, --kexec, --poweroff, --reexec, --reboot, --single or --write-only";
+ "--cancel, --halt, --kexec, --poweroff, --reexec, --reboot, --single or \n"
+ "--write-only";
+const char *nologin_file = RC_SYSCONFDIR"/nologin";
+const char *shutdown_pid = "/run/openrc-shutdown.pid";
+static bool do_cancel = false;
static bool do_dryrun = false;
static bool do_halt = false;
static bool do_kexec = false;
@@ -76,6 +85,40 @@ static bool do_single = false;
static bool do_wtmp = true;
static bool do_wtmp_only = false;
+static void cancel_shutdown(void)
+{
+ pid_t pid;
+
+ pid = get_pid(applet, shutdown_pid);
+ if (pid <= 0)
+ eerrorx("%s: Unable to cancel shutdown", applet);
+
+ if (kill(pid, SIGTERM) != -1)
+ einfo("%s: shutdown canceled", applet);
+ else
+ eerrorx("%s: Unable to cancel shutdown", applet);
+}
+
+/*
+ * Create the nologin file.
+ */
+static void create_nologin(int mins)
+{
+ FILE *fp;
+ time_t t;
+
+ time(&t);
+ t += 60 * mins;
+
+ if ((fp = fopen(nologin_file, "w")) != NULL) {
+ fprintf(fp, "\rThe system is going down on %s\r\n", ctime(&t));
+ fclose(fp);
+ }
+}
+
+/*
+ * Send a command to our init
+ */
static void send_cmd(const char *cmd)
{
FILE *fifo;
@@ -99,16 +142,59 @@ static void send_cmd(const char *cmd)
fclose(fifo);
}
+/*
+ * sleep without being interrupted.
+ * The idea for this code came from sysvinit.
+ */
+static void sleep_no_interrupt(int seconds)
+{
+ struct timespec duration;
+ struct timespec remaining;
+
+ duration.tv_sec = seconds;
+ duration.tv_nsec = 0;
+
+ while(nanosleep(&duration, &remaining) < 0 && errno == EINTR)
+ duration = remaining;
+}
+
+static void stop_shutdown(int sig)
+{
+ /* use the sig parameter so the compiler will not complain */
+ if (sig == SIGINT)
+ ;
+ unlink(nologin_file);
+ unlink(shutdown_pid);
+einfo("Shutdown canceled");
+exit(0);
+}
+
int main(int argc, char **argv)
{
+ char *ch = NULL;
int opt;
int cmd_count = 0;
+ int hour = 0;
+ int min = 0;
+ int shutdown_delay = 0;
+ struct sigaction sa;
+ struct tm *lt;
+ time_t tv;
+ bool need_warning = false;
+ char *msg = NULL;
+ char *state = NULL;
+ char *time_arg = NULL;
+ FILE *fp;
applet = basename_c(argv[0]);
while ((opt = getopt_long(argc, argv, getoptstring,
longopts, (int *) 0)) != -1)
{
switch (opt) {
+ case 'c':
+ do_cancel = true;
+ cmd_count++;
+ break;
case 'd':
do_wtmp = false;
break;
@@ -117,14 +203,17 @@ int main(int argc, char **argv)
break;
case 'H':
do_halt = true;
+ xasprintf(&state, "%s", "halt");
cmd_count++;
break;
case 'K':
do_kexec = true;
+ xasprintf(&state, "%s", "reboot");
cmd_count++;
break;
case 'p':
do_poweroff = true;
+ xasprintf(&state, "%s", "power off");
cmd_count++;
break;
case 'R':
@@ -133,10 +222,12 @@ int main(int argc, char **argv)
break;
case 'r':
do_reboot = true;
+ xasprintf(&state, "%s", "reboot");
cmd_count++;
break;
case 's':
do_single = true;
+ xasprintf(&state, "%s", "go down for maintenance");
cmd_count++;
break;
case 'w':
@@ -146,12 +237,88 @@ int main(int argc, char **argv)
case_RC_COMMON_GETOPT
}
}
- if (geteuid() != 0 && ! do_dryrun)
+ if (geteuid() != 0)
eerrorx("%s: you must be root\n", applet);
if (cmd_count != 1) {
eerror("%s: %s\n", applet, exclusive);
usage(EXIT_FAILURE);
}
+
+ if (do_cancel) {
+ cancel_shutdown();
+ exit(EXIT_SUCCESS);
+ } else if (do_reexec) {
+ send_cmd("reexec");
+ exit(EXIT_SUCCESS);
+ }
+
+ if (optind >= argc) {
+ eerror("%s: No shutdown time specified", applet);
+ usage(EXIT_FAILURE);
+ }
+ time_arg = argv[optind];
+ if (*time_arg == '+')
+ time_arg++;
+ if (strcasecmp(time_arg, "now") == 0)
+ strcpy(time_arg, "0");
+ for (ch=time_arg; *ch; ch++)
+ if ((*ch < '0' || *ch > '9') && *ch != ':') {
+ eerror("%s: invalid time %s", applet, time_arg);
+ usage(EXIT_FAILURE);
+ }
+ if (strchr(time_arg, ':')) {
+ if ((sscanf(time_arg, "%2d:%2d", &hour, &min) != 2) ||
+ (hour > 23) || (min > 59)) {
+ eerror("%s: invalid time %s", applet, time_arg);
+ usage(EXIT_FAILURE);
+ }
+ time(&tv);
+ lt = localtime(&tv);
+ shutdown_delay = (hour * 60 + min) - (lt->tm_hour * 60 + lt->tm_min);
+ if (shutdown_delay < 0)
+ shutdown_delay += 1440;
+ } else {
+ shutdown_delay = atoi(time_arg);
+ }
+
+ fp = fopen(shutdown_pid, "w");
+ if (!fp)
+ eerrorx("%s: fopen `%s': %s", applet, shutdown_pid, strerror(errno));
+ fprintf(fp, "%d\n", getpid());
+ fclose(fp);
+
+ openlog(applet, LOG_PID, LOG_DAEMON);
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = stop_shutdown;
+ sigemptyset(&sa.sa_mask);
+ sigaction(SIGINT, &sa, NULL);
+ sigaction(SIGTERM, &sa, NULL);
+ while (shutdown_delay > 0) {
+ need_warning = false;
+ if (shutdown_delay > 180)
+ need_warning = (shutdown_delay % 60 == 0);
+ else if (shutdown_delay > 60)
+ need_warning = (shutdown_delay % 30 == 0);
+ else if (shutdown_delay > 10)
+ need_warning = (shutdown_delay % 15 == 0);
+ else
+ need_warning = true;
+ if (shutdown_delay <= 5)
+ create_nologin(shutdown_delay);
+ if (need_warning) {
+ xasprintf(&msg, "\rThe system will %s in %d minutes\r\n",
+ state, shutdown_delay);
+ broadcast(msg);
+ free(msg);
+ }
+ sleep_no_interrupt(60);
+ shutdown_delay--;
+ }
+ xasprintf(&msg, "\rThe system will %s now\r\n", state);
+ broadcast(msg);
+ syslog(LOG_NOTICE, "The system will %s now", state);
+ unlink(nologin_file);
+ unlink(shutdown_pid);
if (do_halt)
send_cmd("halt");
else if (do_kexec)
@@ -160,11 +327,9 @@ int main(int argc, char **argv)
send_cmd("poweroff");
else if (do_reboot)
send_cmd("reboot");
- else if (do_reexec)
- send_cmd("reexec");
- else if (do_wtmp_only)
- log_wtmp("shutdown", "~~", 0, RUN_LVL, "~~");
else if (do_single)
send_cmd("single");
+ else if (do_wtmp_only)
+ log_wtmp("shutdown", "~~", 0, RUN_LVL, "~~");
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 15:20:18 +0000