USE_ROUTE(APPLET(route, _BB_DIR_SBIN, _BB_SUID_NEVER))
USE_RPM(APPLET(rpm, _BB_DIR_BIN, _BB_SUID_NEVER))
USE_RPM2CPIO(APPLET(rpm2cpio, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
+USE_RTCWAKE(APPLET(rtcwake, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_RUN_PARTS(APPLET_ODDNAME(run-parts, run_parts, _BB_DIR_BIN, _BB_SUID_NEVER, run_parts))
USE_RUNCON(APPLET(runcon, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_RUNLEVEL(APPLET(runlevel, _BB_DIR_SBIN, _BB_SUID_NEVER))
--- /dev/null
+/*
+ * Common defines/structures/etc... for applets that need to work with the RTC.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _BB_RTC_H_
+#define _BB_RTC_H_
+
+#include "libbb.h"
+
+extern int rtc_adjtime_is_utc(void);
+extern int rtc_xopen(const char *default_rtc, int flags);
+extern time_t rtc_read_time(int fd, int utc);
+
+
+
+/*
+ * Everything below this point has been copied from linux/rtc.h
+ * to eliminate the kernel header dependency
+ */
+
+struct linux_rtc_time {
+ int tm_sec;
+ int tm_min;
+ int tm_hour;
+ int tm_mday;
+ int tm_mon;
+ int tm_year;
+ int tm_wday;
+ int tm_yday;
+ int tm_isdst;
+};
+
+struct linux_rtc_wkalrm {
+ unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */
+ unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */
+ struct linux_rtc_time time; /* time the alarm is set to */
+};
+
+/*
+ * ioctl calls that are permitted to the /dev/rtc interface, if
+ * any of the RTC drivers are enabled.
+ */
+
+#define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */
+#define RTC_AIE_OFF _IO('p', 0x02) /* ... off */
+#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */
+#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */
+#define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */
+#define RTC_PIE_OFF _IO('p', 0x06) /* ... off */
+#define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */
+#define RTC_WIE_OFF _IO('p', 0x10) /* ... off */
+
+#define RTC_ALM_SET _IOW('p', 0x07, struct linux_rtc_time) /* Set alarm time */
+#define RTC_ALM_READ _IOR('p', 0x08, struct linux_rtc_time) /* Read alarm time */
+#define RTC_RD_TIME _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time */
+#define RTC_SET_TIME _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time */
+#define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */
+#define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */
+#define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */
+#define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */
+
+#define RTC_WKALM_SET _IOW('p', 0x0f, struct linux_rtc_wkalrm)/* Set wakeup alarm*/
+#define RTC_WKALM_RD _IOR('p', 0x10, struct linux_rtc_wkalrm)/* Get wakeup alarm*/
+
+/* interrupt flags */
+#define RTC_IRQF 0x80 /* any of the following is active */
+#define RTC_PF 0x40
+#define RTC_AF 0x20
+#define RTC_UF 0x10
+
+#endif
#define rpm2cpio_full_usage \
"Output a cpio archive of the rpm file"
+#define rtcwake_trivial_usage \
+ "[-a | -l | -u] [-d DEV] [-m MODE] [-s SECS | -t TIME]"
+#define rtcwake_full_usage \
+ "enter a system sleep state until specified wakeup time\n\n" \
+ USE_GETOPT_LONG( \
+ " -a,--auto Read clock mode from adjtime\n" \
+ " -l,--local Clock is set to local time\n" \
+ " -u,--utc Clock is set to UTC time\n" \
+ " -d,--device=DEV Specify the RTC device\n" \
+ " -m,--mode=MODE Set the sleep state (default: standby)\n" \
+ " -s,--seconds=SEC Set the timeout in SEC seconds from now\n" \
+ " -t,--time=TIME Set the timeout to TIME seconds from epoch" \
+ ) \
+ SKIP_GETOPT_LONG( \
+ " -a Read clock mode from adjtime\n" \
+ " -l Clock is set to local time\n" \
+ " -u Clock is set to UTC time\n" \
+ " -d DEV Specify the RTC device\n" \
+ " -m MODE Set the sleep state (default: standby)\n" \
+ " -s SEC Set the timeout in SEC seconds from now\n" \
+ " -t TIME Set the timeout to TIME seconds from epoch" \
+ )
+
#define runcon_trivial_usage \
"[-c] [-u USER] [-r ROLE] [-t TYPE] [-l RANGE] COMMAND [args]\n" \
" runcon CONTEXT COMMAND [args]"
lib-$(CONFIG_DF) += find_mount_point.o
lib-$(CONFIG_MKFS_MINIX) += find_mount_point.o
lib-$(CONFIG_SELINUX) += selinux_common.o
+lib-$(CONFIG_HWCLOCK) += rtc.o
+lib-$(CONFIG_RTCWAKE) += rtc.o
# We shouldn't build xregcomp.c if we don't need it - this ensures we don't
# require regex.h to be in the include dir even if we don't need it thereby
--- /dev/null
+/*
+ * Common RTC functions
+ */
+
+#include "libbb.h"
+#include "rtc_.h"
+
+#if ENABLE_FEATURE_HWCLOCK_ADJTIME_FHS
+# define ADJTIME_PATH "/var/lib/hwclock/adjtime"
+#else
+# define ADJTIME_PATH "/etc/adjtime"
+#endif
+
+int rtc_adjtime_is_utc(void)
+{
+ int utc = 0;
+ FILE *f = fopen(ADJTIME_PATH, "r");
+
+ if (f) {
+ RESERVE_CONFIG_BUFFER(buffer, 128);
+
+ while (fgets(buffer, sizeof(buffer), f)) {
+ int len = strlen(buffer);
+
+ while (len && isspace(buffer[len - 1]))
+ len--;
+
+ buffer[len] = 0;
+
+ if (strncmp(buffer, "UTC", 3) == 0) {
+ utc = 1;
+ break;
+ }
+ }
+ fclose(f);
+
+ RELEASE_CONFIG_BUFFER(buffer);
+ }
+
+ return utc;
+}
+
+int rtc_xopen(const char *default_rtc, int flags)
+{
+ int rtc;
+
+ if (!default_rtc) {
+ rtc = open("/dev/rtc", flags);
+ if (rtc >= 0)
+ return rtc;
+ rtc = open("/dev/rtc0", flags);
+ if (rtc >= 0)
+ return rtc;
+ default_rtc = "/dev/misc/rtc";
+ }
+
+ return xopen(default_rtc, flags);
+}
+
+time_t rtc_read_time(int fd, int utc)
+{
+ struct tm tm;
+ char *oldtz = 0;
+ time_t t = 0;
+
+ memset(&tm, 0, sizeof(struct tm));
+ xioctl(fd, RTC_RD_TIME, &tm);
+ tm.tm_isdst = -1; /* not known */
+
+ if (utc) {
+ oldtz = getenv("TZ");
+ putenv((char*)"TZ=UTC0");
+ tzset();
+ }
+
+ t = mktime(&tm);
+
+ if (utc) {
+ unsetenv("TZ");
+ if (oldtz)
+ putenv(oldtz - 3);
+ tzset();
+ }
+
+ return t;
+}
help
This allows you to parse /proc/profile for basic profiling.
+config RTCWAKE
+ bool "rtcwake"
+ default n
+ help
+ Enter a system sleep state until specified wakeup time.
+
config SETARCH
bool "setarch"
default n
lib-$(CONFIG_PIVOT_ROOT) +=pivot_root.o
lib-$(CONFIG_RDATE) +=rdate.o
lib-$(CONFIG_READPROFILE) +=readprofile.o
+lib-$(CONFIG_RTCWAKE) +=rtcwake.o
lib-$(CONFIG_SETARCH) +=setarch.o
lib-$(CONFIG_SWAPONOFF) +=swaponoff.o
lib-$(CONFIG_SWITCH_ROOT) +=switch_root.o
#include <sys/utsname.h>
#include <getopt.h>
#include "libbb.h"
-
-/* Copied from linux/rtc.h to eliminate the kernel dependency */
-struct linux_rtc_time {
- int tm_sec;
- int tm_min;
- int tm_hour;
- int tm_mday;
- int tm_mon;
- int tm_year;
- int tm_wday;
- int tm_yday;
- int tm_isdst;
-};
-
-#define RTC_SET_TIME _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time */
-#define RTC_RD_TIME _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time */
+#include "rtc_.h"
#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
# ifndef _GNU_SOURCE
static const char *rtcname;
-static int xopen_rtc(int flags)
-{
- int rtc;
-
- if (!rtcname) {
- rtc = open("/dev/rtc", flags);
- if (rtc >= 0)
- return rtc;
- rtc = open("/dev/rtc0", flags);
- if (rtc >= 0)
- return rtc;
- rtcname = "/dev/misc/rtc";
- }
- return xopen(rtcname, flags);
-}
-
static time_t read_rtc(int utc)
{
- struct tm tm;
- char *oldtz = 0;
- time_t t = 0;
- int rtc = xopen_rtc(O_RDONLY);
+ time_t ret;
+ int fd;
- memset(&tm, 0, sizeof(struct tm));
- xioctl(rtc, RTC_RD_TIME, &tm);
- tm.tm_isdst = -1; /* not known */
+ fd = rtc_xopen(rtcname, O_RDONLY);
+ ret = rtc_read_time(fd, utc);
+ close(fd);
- close(rtc);
-
- if (utc) {
- oldtz = getenv("TZ");
- putenv((char*)"TZ=UTC0");
- tzset();
- }
-
- t = mktime(&tm);
-
- if (utc) {
- unsetenv("TZ");
- if (oldtz)
- putenv(oldtz - 3);
- tzset();
- }
- return t;
+ return ret;
}
static void write_rtc(time_t t, int utc)
{
struct tm tm;
- int rtc = xopen_rtc(O_WRONLY);
+ int rtc = rtc_xopen(rtcname, O_WRONLY);
tm = *(utc ? gmtime(&t) : localtime(&t));
tm.tm_isdst = 0;
write_rtc(tv.tv_sec, utc);
}
-#if ENABLE_FEATURE_HWCLOCK_ADJTIME_FHS
-# define ADJTIME_PATH "/var/lib/hwclock/adjtime"
-#else
-# define ADJTIME_PATH "/etc/adjtime"
-#endif
-static int check_utc(void)
-{
- int utc = 0;
- FILE *f = fopen(ADJTIME_PATH, "r");
-
- if (f) {
- RESERVE_CONFIG_BUFFER(buffer, 128);
-
- while (fgets(buffer, sizeof(buffer), f)) {
- int len = strlen(buffer);
-
- while (len && isspace(buffer[len - 1]))
- len--;
-
- buffer[len] = 0;
-
- if (strncmp(buffer, "UTC", 3) == 0) {
- utc = 1;
- break;
- }
- }
- fclose(f);
- RELEASE_CONFIG_BUFFER(buffer);
- }
- return utc;
-}
-
#define HWCLOCK_OPT_LOCALTIME 0x01
#define HWCLOCK_OPT_UTC 0x02
#define HWCLOCK_OPT_SHOW 0x04
/* If -u or -l wasn't given check if we are using utc */
if (opt & (HWCLOCK_OPT_UTC | HWCLOCK_OPT_LOCALTIME))
- utc = opt & HWCLOCK_OPT_UTC;
+ utc = (opt & HWCLOCK_OPT_UTC);
else
- utc = check_utc();
+ utc = rtc_adjtime_is_utc();
- if (opt & HWCLOCK_OPT_HCTOSYS) {
+ if (opt & HWCLOCK_OPT_HCTOSYS)
to_sys_clock(utc);
- return 0;
- }
- if (opt & HWCLOCK_OPT_SYSTOHC) {
+ else if (opt & HWCLOCK_OPT_SYSTOHC)
from_sys_clock(utc);
- return 0;
- }
- /* default HWCLOCK_OPT_SHOW */
- show_clock(utc);
+ else
+ /* default HWCLOCK_OPT_SHOW */
+ show_clock(utc);
+
return 0;
}
--- /dev/null
+/*
+ * rtcwake -- enter a system sleep state until specified wakeup time.
+ *
+ * This version was taken from util-linux and scrubbed down for busybox.
+ *
+ * This uses cross-platform Linux interfaces to enter a system sleep state,
+ * and leave it no later than a specified time. It uses any RTC framework
+ * driver that supports standard driver model wakeup flags.
+ *
+ * This is normally used like the old "apmsleep" utility, to wake from a
+ * suspend state like ACPI S1 (standby) or S3 (suspend-to-RAM). Most
+ * platforms can implement those without analogues of BIOS, APM, or ACPI.
+ *
+ * On some systems, this can also be used like "nvram-wakeup", waking
+ * from states like ACPI S4 (suspend to disk). Not all systems have
+ * persistent media that are appropriate for such suspend modes.
+ *
+ * The best way to set the system's RTC is so that it holds the current
+ * time in UTC. Use the "-l" flag to tell this program that the system
+ * RTC uses a local timezone instead (maybe you dual-boot MS-Windows).
+ * That flag should not be needed on systems with adjtime support.
+ */
+
+#include "libbb.h"
+#include "rtc_.h"
+
+#define SYS_RTC_PATH "/sys/class/rtc/%s/device/power/wakeup"
+#define SYS_POWER_PATH "/sys/power/state"
+#define DEFAULT_MODE "suspend"
+
+static time_t rtc_time;
+
+static int may_wakeup(const char *rtcname)
+{
+ ssize_t ret;
+ char buf[128];
+
+ /* strip the '/dev/' from the rtcname here */
+ if (!strncmp(rtcname, "/dev/", 5))
+ rtcname += 5;
+
+ snprintf(buf, sizeof(buf), SYS_RTC_PATH, rtcname);
+ ret = open_read_close(buf, buf, sizeof(buf));
+ if (ret < 0)
+ return 0;
+
+ /* wakeup events could be disabled or not supported */
+ return strcmp(buf, "enabled\n") == 0;
+}
+
+static void setup_alarm(int fd, time_t *wakeup)
+{
+ struct tm *tm;
+ struct linux_rtc_wkalrm wake;
+
+ /* The wakeup time is in POSIX time (more or less UTC).
+ * Ideally RTCs use that same time; but PCs can't do that
+ * if they need to boot MS-Windows. Messy...
+ *
+ * When running in utc mode this process's timezone is UTC,
+ * so we'll pass a UTC date to the RTC.
+ *
+ * Else mode is local so the time given to the RTC
+ * will instead use the local time zone.
+ */
+ tm = localtime(wakeup);
+
+ wake.time.tm_sec = tm->tm_sec;
+ wake.time.tm_min = tm->tm_min;
+ wake.time.tm_hour = tm->tm_hour;
+ wake.time.tm_mday = tm->tm_mday;
+ wake.time.tm_mon = tm->tm_mon;
+ wake.time.tm_year = tm->tm_year;
+ /* wday, yday, and isdst fields are unused by Linux */
+ wake.time.tm_wday = -1;
+ wake.time.tm_yday = -1;
+ wake.time.tm_isdst = -1;
+
+ /* many rtc alarms only support up to 24 hours from 'now',
+ * so use the "more than 24 hours" request only if we must
+ */
+ if ((rtc_time + (24 * 60 * 60)) > *wakeup) {
+ xioctl(fd, RTC_ALM_SET, &wake.time);
+ xioctl(fd, RTC_AIE_ON, 0);
+ } else {
+ /* avoid an extra AIE_ON call */
+ wake.enabled = 1;
+ xioctl(fd, RTC_WKALM_SET, &wake);
+ }
+}
+
+static void suspend_system(const char *suspend)
+{
+ FILE *f = xfopen(SYS_POWER_PATH, "w");
+ fprintf(f, "%s\n", suspend);
+ fflush(f);
+ /* this executes after wake from suspend */
+ fclose(f);
+}
+
+#define RTCWAKE_OPT_AUTO 0x01
+#define RTCWAKE_OPT_LOCAL 0x02
+#define RTCWAKE_OPT_UTC 0x04
+#define RTCWAKE_OPT_DEVICE 0x08
+#define RTCWAKE_OPT_SUSPEND_MODE 0x10
+#define RTCWAKE_OPT_SECONDS 0x20
+#define RTCWAKE_OPT_TIME 0x40
+
+int rtcwake_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int rtcwake_main(int argc, char **argv)
+{
+ unsigned opt;
+ const char *rtcname = NULL;
+ const char *suspend;
+ const char *opt_seconds;
+ const char *opt_time;
+
+ time_t sys_time;
+ time_t alarm_time = 0;
+ unsigned seconds = 0;
+ int utc = -1;
+ int fd;
+
+#if ENABLE_GETOPT_LONG
+ static const char rtcwake_longopts[] ALIGN1 =
+ "auto\0" No_argument "a"
+ "local\0" No_argument "l"
+ "utc\0" No_argument "u"
+ "device\0" Required_argument "d"
+ "mode\0" Required_argument "m"
+ "seconds\0" Required_argument "s"
+ "time\0" Required_argument "t"
+ ;
+ applet_long_options = rtcwake_longopts;
+ }
+#endif
+ opt = getopt32(argv, "alud:m:s:t:", &rtcname, &suspend, &opt_seconds, &opt_time);
+
+ /* this is the default
+ if (opt & RTCWAKE_OPT_AUTO)
+ utc = -1;
+ */
+ if (opt & (RTCWAKE_OPT_UTC | RTCWAKE_OPT_LOCAL))
+ utc = opt & RTCWAKE_OPT_UTC;
+ if (!(opt & RTCWAKE_OPT_SUSPEND_MODE))
+ suspend = DEFAULT_MODE;
+ if (opt & RTCWAKE_OPT_SECONDS)
+ /* alarm time, seconds-to-sleep (relative) */
+ seconds = xatoi(opt_seconds);
+ if (opt & RTCWAKE_OPT_TIME)
+ /* alarm time, time_t (absolute, seconds since 1/1 1970 UTC) */
+ alarm_time = xatoi(opt_time);
+
+ if (!alarm_time && !seconds)
+ bb_error_msg_and_die("must provide wake time");
+
+ if (utc == -1)
+ utc = rtc_adjtime_is_utc();
+
+ /* the rtcname is relative to /dev */
+ xchdir("/dev");
+
+ if (strcmp(suspend, "on") != 0 && !may_wakeup(rtcname))
+ bb_error_msg_and_die("%s not enabled for wakeup events", rtcname);
+
+ /* this RTC must exist and (if we'll sleep) be wakeup-enabled */
+ fd = rtc_xopen(rtcname, O_RDONLY);
+
+ /* relative or absolute alarm time, normalized to time_t */
+ sys_time = time(0);
+ if (sys_time == (time_t)-1)
+ bb_perror_msg_and_die("read system time");
+ rtc_time = rtc_read_time(fd, utc);
+
+ if (alarm_time) {
+ if (alarm_time < sys_time)
+ bb_error_msg_and_die("time doesn't go backward to %s", ctime(&alarm_time));
+ alarm_time += sys_time - rtc_time;
+ } else
+ alarm_time = rtc_time + seconds + 1;
+ setup_alarm(fd, &alarm_time);
+
+ sync();
+ printf("wakeup from \"%s\" at %s", suspend, ctime(&alarm_time));
+ fflush(stdout);
+ usleep(10 * 1000);
+
+ if (!strcmp(suspend, "on"))
+ suspend_system(suspend);
+ else {
+ /* "fake" suspend ... we'll do the delay ourselves */
+ unsigned long data;
+
+ do {
+ ssize_t ret = safe_read(fd, &data, sizeof(data));
+ if (ret < 0) {
+ bb_perror_msg("rtc read");
+ break;
+ }
+ } while (!(data & RTC_AF));
+ }
+
+ xioctl(fd, RTC_AIE_OFF, 0);
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(fd);
+
+ return EXIT_SUCCESS;
+}
projects / oweals / busybox.git / commitdiff