diff options
| -rw-r--r-- | toys/pending/rtcwake.c | 79 |
1 files changed, 31 insertions, 48 deletions
diff --git a/toys/pending/rtcwake.c b/toys/pending/rtcwake.c index 61f76fbe..0b034594 100644 --- a/toys/pending/rtcwake.c +++ b/toys/pending/rtcwake.c @@ -16,15 +16,11 @@ config RTCWAKE -d FILE Device to use (default /dev/rtc) -l RTC uses local time -m Mode (--list-modes to see those supported by your kernel): - disable Cancel current alarm - freeze Freeze processes, idle processors - disk S4: suspend to disk - mem S3: suspend to RAM - no Don't suspend, just set wakeup time - off S5: power off - on Don't suspend, poll RTC for alarm - show Don't suspend, just show current alarm - standby S1: default + standby S1: default mem S3: suspend to RAM + disk S4: suspend to disk off S5: power off + disable Cancel current alarm freeze stop processes/processors + no just set wakeup time on just poll RTC for alarm + show just show current alarm -s SECS Wake SECS seconds from now -t UNIX Wake UNIX seconds from epoch -u RTC uses UTC @@ -36,21 +32,20 @@ config RTCWAKE #include <linux/rtc.h> GLOBALS( - long long t, s; + long t, s; char *m, *d; ) void rtcwake_main(void) { - struct rtc_wkalrm alarm; + struct rtc_wkalrm *alarm = (void *)(toybuf+2048); struct tm rtc_tm; time_t now, rtc_now, then; int fd, utc; - memset(&alarm, 0, sizeof(alarm)); if (FLAG(list_modes)) { - xreadfile("/sys/power/state", toybuf, sizeof(toybuf)); - printf("off no on disable show %s", toybuf); + printf("off no on disable show %s", + xreadfile("/sys/power/state", toybuf, 2048)); return; } @@ -60,10 +55,7 @@ void rtcwake_main(void) if (FLAG(u)) utc = 1; else if (FLAG(l)) utc = 0; - else { - xreadfile("/etc/adjtime", toybuf, sizeof(toybuf)); - utc = !!strstr(toybuf, "UTC"); - } + else utc = !!strstr(xreadfile("/etc/adjtime", toybuf, 2048), "UTC"); if (FLAG(v)) xprintf("RTC time: %s\n", utc ? "UTC" : "local"); if (!TT.d) TT.d = "/dev/rtc0"; @@ -79,40 +71,39 @@ void rtcwake_main(void) } if (!strcmp(TT.m, "show")) { // Don't suspend, just show current alarm. - xioctl(fd, RTC_WKALM_RD, &alarm); - if (!alarm.enabled) xputs("alarm: off"); + xioctl(fd, RTC_WKALM_RD, alarm); + if (!alarm->enabled) xputs("alarm: off"); else { - if ((then = mktime((void *)&alarm.time)) < 0) perror_exit("mktime"); + if ((then = mktime((void *)&alarm->time)) < 0) perror_exit("mktime"); xprintf("alarm: on %s", ctime(&then)); } - goto done; + return; } else if (!strcmp(TT.m, "disable")) { // Cancel current alarm. - xioctl(fd, RTC_WKALM_RD, &alarm); - alarm.enabled = 0; - xioctl(fd, RTC_WKALM_SET, &alarm); - goto done; + xioctl(fd, RTC_WKALM_RD, alarm); + alarm->enabled = 0; + xioctl(fd, RTC_WKALM_SET, alarm); + return; } - if (FLAG(s)) { - then = rtc_now + TT.s + 1; // strace shows util-linux adds 1. - } else if (FLAG(t)) { + if (FLAG(s)) then = rtc_now + TT.s + 1; // strace shows util-linux adds 1. + else if (FLAG(t)) { then = TT.t + (rtc_now - now); - if (then<=rtc_now) error_exit("rtc %lld >= %lld", (long long)rtc_now, TT.t); + if (then<=rtc_now) error_exit("rtc %lld >= %ld", (long long)rtc_now, TT.t); } else help_exit("-m %s needs -s or -t", TT.m); if (FLAG(v)) xprintf("Wake time:\t%lld / %s", (long long)then, ctime(&then)); - if (!(utc ? gmtime_r : localtime_r)(&then, (void *)&alarm.time)) - error_exit(utc ? "gmtime_r failed" : "localtime_r failed"); + if (!(utc ? gmtime_r : localtime_r)(&then, (void *)&alarm->time)) + error_exit("%s failed", utc ? "gmtime_r" : "localtime_r"); - alarm.enabled = 1; - xioctl(fd, RTC_WKALM_SET, &alarm); + alarm->enabled = 1; + xioctl(fd, RTC_WKALM_SET, alarm); sync(); xprintf("wakeup using \"%s\" from %s at %s", TT.m, TT.d, ctime(&then)); msleep(10); - if (!strcmp(TT.m, "no")) { // Don't suspend, just set wakeup time. - } else if (!strcmp(TT.m, "on")) { // Don't suspend, poll RTC for alarm. + if (!strcmp(TT.m, "no")); // Don't suspend, just set wakeup time. + else if (!strcmp(TT.m, "on")) { // Don't suspend, poll RTC for alarm. unsigned long data = 0; if (FLAG(v)) xputs("Reading RTC..."); @@ -120,16 +111,8 @@ void rtcwake_main(void) if (read(fd, &data, sizeof(data)) != sizeof(data)) perror_exit("read"); if (FLAG(v)) xprintf("... %s: %lx\n", TT.d, data); } - } else if (!strcmp(TT.m, "off")) { - xexec((char *[]){"poweroff", 0}); - } else { - // Everything else lands here for one final step. The write will fail with - // EINVAL if the mode is not supported. - int fd = xopen("/sys/power/state", O_WRONLY); - - xwrite(fd, TT.m, strlen(TT.m)); - close(fd); - } -done: - close(fd); + } else if (!strcmp(TT.m, "off")) xexec((char *[]){"poweroff", 0}); + // Everything else lands here for one final step. The write will fail with + // EINVAL if the mode is not supported. + else xwrite(xopen("/sys/power/state", O_WRONLY), TT.m, strlen(TT.m)); } |