split some rtc funcs out of hwclock and into an rtc header/lib so that the new rtcwake applet as well as hwclock can utilize the same code

3 files changed, 97 insertions, 0 deletions

diff --git a/include/applets.h b/include/applets.h
index b14c20528..90b6e703d 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -293,6 +293,7 @@ USE_RMMOD(APPLET(rmmod, _BB_DIR_SBIN, _BB_SUID_NEVER))
 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))
diff --git a/include/rtc_.h b/include/rtc_.h
new file mode 100644
index 000000000..50b60dd29
--- /dev/null
+++ b/include/rtc_.h
@@ -0,0 +1,73 @@
+/*
+ * 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
diff --git a/include/usage.h b/include/usage.h
index 51a92126c..71e1d125f 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3070,6 +3070,29 @@ USE_FEATURE_BRCTL_FANCY("\n" \
 #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]"