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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]"
- @@ -139,9 +140,8 @@
-
- #include "libbb.h"
- #include "common_bufsiz.h"
- -#if ENABLE_FEATURE_DATE_NANO
- -# include <sys/syscall.h>
- -#endif
- +#include <sys/time.h>
- +#include <sys/syscall.h>
-
- enum {
- OPT_RFC2822 = (1 << 0), /* R */
- @@ -149,8 +149,9 @@ 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 */
- };
-
- #if ENABLE_LONG_OPTS
- @@ -162,6 +163,7 @@ 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
-
- @@ -181,6 +183,8 @@ static void maybe_set_utc(int opt)
- 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];
- @@ -193,7 +197,7 @@ int date_main(int argc UNUSED_PARAM, cha
- char *isofmt_arg = NULL;
-
- opt = getopt32long(argv, "^"
- - "Rs:ud:r:"
- + "Rs:ud:r:k"
- IF_FEATURE_DATE_ISOFMT("I::D:")
- "\0"
- "d--s:s--d"
- @@ -256,6 +260,31 @@ 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));
- + syscall(SYS_settimeofday, NULL, &tz);
- +
- + memset(&tz, 0, sizeof(tz));
- +#ifdef __USE_MISC
- + tz.tz_minuteswest = -(tm_time.tm_gmtoff / 60);
- +#else
- + tz.tz_minuteswest = -(tm_time.__tm_gmtoff / 60);
- +#endif
- +
- + if (syscall(SYS_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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