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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "fd-util.h"
#include "initreq.h"
#include "io-util.h"
#include "parse-util.h"
#include "strv.h"
#include "sysv-compat.h"
#if HAVE_SYSV_COMPAT
int talk_initctl(char rl) {
struct init_request request;
_cleanup_close_ int fd = -1;
const char *p;
int r;
/* Try to switch to the specified SysV runlevel. Returns == 0 if the operation does not apply on this
* system, and > 0 on success. */
if (rl == 0)
return 0;
FOREACH_STRING(p, "/run/initctl", "/dev/initctl") {
fd = open(p, O_WRONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY);
if (fd >= 0 || errno != ENOENT)
break;
}
if (fd < 0) {
if (errno == ENOENT)
return 0;
return log_error_errno(errno, "Failed to open initctl fifo: %m");
}
request = (struct init_request) {
.magic = INIT_MAGIC,
.sleeptime = 0,
.cmd = INIT_CMD_RUNLVL,
.runlevel = rl,
};
r = loop_write(fd, &request, sizeof(request), false);
if (r < 0)
return log_error_errno(r, "Failed to write to %s: %m", p);
return 1;
}
#endif
int parse_shutdown_time_spec(const char *t, usec_t *ret) {
assert(t);
assert(ret);
if (streq(t, "now"))
*ret = 0;
else if (!strchr(t, ':')) {
uint64_t u;
if (safe_atou64(t, &u) < 0)
return -EINVAL;
*ret = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
} else {
char *e = NULL;
long hour, minute;
struct tm tm = {};
time_t s;
usec_t n;
errno = 0;
hour = strtol(t, &e, 10);
if (errno > 0 || *e != ':' || hour < 0 || hour > 23)
return -EINVAL;
minute = strtol(e+1, &e, 10);
if (errno > 0 || *e != 0 || minute < 0 || minute > 59)
return -EINVAL;
n = now(CLOCK_REALTIME);
s = (time_t) (n / USEC_PER_SEC);
assert_se(localtime_r(&s, &tm));
tm.tm_hour = (int) hour;
tm.tm_min = (int) minute;
tm.tm_sec = 0;
s = mktime(&tm);
assert(s >= 0);
*ret = (usec_t) s * USEC_PER_SEC;
while (*ret <= n)
*ret += USEC_PER_DAY;
}
return 0;
}
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