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--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -123,6 +123,7 @@
//usage: IF_FEATURE_DATE_ISOFMT(
//usage: "\n -D FMT Use FMT for -d TIME conversion"
//usage: )
+//usage: "\n -k Set Kernel timezone from localtime and exit"
//usage: "\n"
//usage: "\nRecognized TIME formats:"
//usage: "\n hh:mm[:ss]"
@@ -135,6 +136,7 @@
//usage: "Wed Apr 12 18:52:41 MDT 2000\n"
#include "libbb.h"
+#include <sys/time.h>
#if ENABLE_FEATURE_DATE_NANO
# include <sys/syscall.h>
#endif
@@ -145,8 +147,9 @@ enum {
OPT_UTC = (1 << 2), /* u */
OPT_DATE = (1 << 3), /* d */
OPT_REFERENCE = (1 << 4), /* r */
- OPT_TIMESPEC = (1 << 5) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
- OPT_HINT = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
+ OPT_KERNELTZ = (1 << 5), /* k */
+ OPT_TIMESPEC = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
+ OPT_HINT = (1 << 7) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
};
static void maybe_set_utc(int opt)
@@ -164,12 +167,15 @@ static const char date_longopts[] ALIGN1
/* "universal\0" No_argument "u" */
"date\0" Required_argument "d"
"reference\0" Required_argument "r"
+ "set-kernel-tz\0" No_argument "k"
;
#endif
int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int date_main(int argc UNUSED_PARAM, char **argv)
{
+ time_t tt;
+ struct timezone tz;
struct timespec ts;
struct tm tm_time;
char buf_fmt_dt2str[64];
@@ -184,7 +190,7 @@ int date_main(int argc UNUSED_PARAM, cha
opt_complementary = "d--s:s--d"
IF_FEATURE_DATE_ISOFMT(":R--I:I--R");
IF_LONG_OPTS(applet_long_options = date_longopts;)
- opt = getopt32(argv, "Rs:ud:r:"
+ opt = getopt32(argv, "Rs:ud:r:k"
IF_FEATURE_DATE_ISOFMT("I::D:"),
&date_str, &date_str, &filename
IF_FEATURE_DATE_ISOFMT(, &isofmt_arg, &fmt_str2dt));
@@ -241,6 +247,27 @@ int date_main(int argc UNUSED_PARAM, cha
if (*argv)
bb_show_usage();
+ /* Setting of kernel timezone was requested */
+ if (opt & OPT_KERNELTZ) {
+ tt = time(NULL);
+ localtime_r(&tt, &tm_time);
+
+ /* workaround warp_clock() on first invocation */
+ memset(&tz, 0, sizeof(tz));
+ settimeofday(NULL, &tz);
+
+ memset(&tz, 0, sizeof(tz));
+ tz.tz_minuteswest = -(tm_time.tm_gmtoff / 60);
+
+ if (settimeofday(NULL, &tz))
+ {
+ bb_perror_msg("can't set kernel time zone");
+ return EXIT_FAILURE;
+ }
+
+ return EXIT_SUCCESS;
+ }
+
/* Now we have parsed all the information except the date format
* which depends on whether the clock is being set or read */
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