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-rw-r--r--toys/other/hwclock.c60
1 files changed, 20 insertions, 40 deletions
diff --git a/toys/other/hwclock.c b/toys/other/hwclock.c
index 52e71604..5ab308df 100644
--- a/toys/other/hwclock.c
+++ b/toys/other/hwclock.c
@@ -25,12 +25,9 @@ config HWCLOCK
#define FOR_hwclock
#include "toys.h"
-#include <linux/rtc.h>
GLOBALS(
char *f;
-
- int utc;
)
static int rtc_find(struct dirtree* node)
@@ -61,23 +58,17 @@ void hwclock_main()
struct timezone tzone;
struct timeval timeval;
struct tm tm;
- time_t time;
- int fd = -1;
+ int fd = -1, utc;
- // check for Grenich Mean Time
- if (toys.optflags & FLAG_u) TT.utc = 1;
+ if (FLAG(u)) utc = 1;
+ else if (FLAG(l)) utc = 0;
else {
- FILE *fp;
- char *s = 0;
-
- for (fp = fopen("/etc/adjtime", "r");
- fp && getline(&s, (void *)toybuf, fp)>0;
- free(s), s = 0) TT.utc += !strncmp(s, "UTC", 3);
- if (fp) fclose(fp);
+ xreadfile("/etc/adjtime", toybuf, sizeof(toybuf));
+ utc = !!strstr(toybuf, "UTC");
}
- if (!(toys.optflags&FLAG_t)) {
- int w = toys.optflags & FLAG_w, flag = O_WRONLY*w;
+ if (!FLAG(t)) {
+ int flag = O_WRONLY*FLAG(w);
// Open /dev/rtc (if your system has no /dev/rtc symlink, search for it).
if (!TT.f && (fd = open("/dev/rtc", flag)) == -1) {
@@ -87,49 +78,38 @@ void hwclock_main()
if (fd == -1) fd = xopen(TT.f, flag);
// Get current time in seconds from rtc device. todo: get subsecond time
- if (!w) {
- char *s = s;
-
+ if (!FLAG(w)) {
xioctl(fd, RTC_RD_TIME, &tm);
- if (TT.utc) s = xtzset("UTC0");
- if ((time = mktime(&tm)) < 0) error_exit("mktime failed");
- if (TT.utc) {
- free(xtzset(s));
- free(s);
- }
+ timeval.tv_sec = xmktime(&tm, utc);
+ timeval.tv_usec = 0; // todo: fixit
}
}
- if (toys.optflags & (FLAG_w|FLAG_t)) {
+ if (FLAG(w) || FLAG(t)) {
if (gettimeofday(&timeval, 0)) perror_exit("gettimeofday failed");
- if (!(TT.utc ? gmtime_r : localtime_r)(&timeval.tv_sec, &tm))
- error_exit(TT.utc ? "gmtime_r failed" : "localtime_r failed");
+ if (!(utc ? gmtime_r : localtime_r)(&timeval.tv_sec, &tm))
+ error_exit(utc ? "gmtime_r failed" : "localtime_r failed");
}
- if (toys.optflags & FLAG_w) {
+ if (FLAG(w)) {
/* The value of tm_isdst is positive if daylight saving time is in effect,
* zero if it is not and negative if the information is not available.
* todo: so why isn't this negative...? */
tm.tm_isdst = 0;
xioctl(fd, RTC_SET_TIME, &tm);
- } else if (toys.optflags & FLAG_s) {
+ } else if (FLAG(s)) {
tzone.tz_minuteswest = timezone / 60 - 60 * daylight;
- timeval.tv_sec = time;
- timeval.tv_usec = 0; // todo: fixit
- } else if (toys.optflags & FLAG_t) {
+ } else if (FLAG(t)) {
// Adjust seconds for timezone and daylight saving time
// extern long timezone is defined in header sys/time.h
tzone.tz_minuteswest = timezone / 60;
if (tm.tm_isdst) tzone.tz_minuteswest -= 60;
- if (!TT.utc) timeval.tv_sec += tzone.tz_minuteswest * 60;
+ if (!utc) timeval.tv_sec += tzone.tz_minuteswest * 60;
} else {
- char *c = ctime(&time), *s = strrchr(c, '\n');
-
- if (s) *s = '\0';
- // TODO: implement this.
- xprintf("%s 0.000000 seconds\n", c);
+ strftime(toybuf, sizeof(toybuf), "%F %T%z", &tm);
+ xputs(toybuf);
}
- if (toys.optflags & (FLAG_t|FLAG_s)) {
+ if (FLAG(t) || FLAG(s)) {
tzone.tz_dsttime = 0;
if (settimeofday(&timeval, &tzone)) perror_exit("settimeofday failed");
}