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92 lines
2.7 KiB
Diff
92 lines
2.7 KiB
Diff
--- a/coreutils/date.c
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+++ b/coreutils/date.c
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@@ -123,6 +123,7 @@
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//usage: IF_FEATURE_DATE_ISOFMT(
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//usage: "\n -D FMT Use FMT for -d TIME conversion"
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//usage: )
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+//usage: "\n -k Set Kernel timezone from localtime and exit"
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//usage: "\n"
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//usage: "\nRecognized TIME formats:"
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//usage: "\n hh:mm[:ss]"
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@@ -138,9 +139,8 @@
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//usage: "Wed Apr 12 18:52:41 MDT 2000\n"
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#include "libbb.h"
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-#if ENABLE_FEATURE_DATE_NANO
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-# include <sys/syscall.h>
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-#endif
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+#include <sys/time.h>
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+#include <sys/syscall.h>
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enum {
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OPT_RFC2822 = (1 << 0), /* R */
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@@ -148,8 +148,9 @@ enum {
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OPT_UTC = (1 << 2), /* u */
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OPT_DATE = (1 << 3), /* d */
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OPT_REFERENCE = (1 << 4), /* r */
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- OPT_TIMESPEC = (1 << 5) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
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- OPT_HINT = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
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+ OPT_KERNELTZ = (1 << 5), /* k */
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+ OPT_TIMESPEC = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
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+ OPT_HINT = (1 << 7) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
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};
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static void maybe_set_utc(int opt)
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@@ -167,12 +168,15 @@ static const char date_longopts[] ALIGN1
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/* "universal\0" No_argument "u" */
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"date\0" Required_argument "d"
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"reference\0" Required_argument "r"
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+ "set-kernel-tz\0" No_argument "k"
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;
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#endif
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int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int date_main(int argc UNUSED_PARAM, char **argv)
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{
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+ time_t tt;
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+ struct timezone tz;
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struct timespec ts;
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struct tm tm_time;
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char buf_fmt_dt2str[64];
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@@ -187,7 +191,7 @@ int date_main(int argc UNUSED_PARAM, cha
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opt_complementary = "d--s:s--d"
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IF_FEATURE_DATE_ISOFMT(":R--I:I--R");
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IF_LONG_OPTS(applet_long_options = date_longopts;)
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- opt = getopt32(argv, "Rs:ud:r:"
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+ opt = getopt32(argv, "Rs:ud:r:k"
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IF_FEATURE_DATE_ISOFMT("I::D:"),
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&date_str, &date_str, &filename
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IF_FEATURE_DATE_ISOFMT(, &isofmt_arg, &fmt_str2dt));
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@@ -244,6 +248,31 @@ int date_main(int argc UNUSED_PARAM, cha
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if (*argv)
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bb_show_usage();
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+ /* Setting of kernel timezone was requested */
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+ if (opt & OPT_KERNELTZ) {
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+ tt = time(NULL);
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+ localtime_r(&tt, &tm_time);
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+
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+ /* workaround warp_clock() on first invocation */
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+ memset(&tz, 0, sizeof(tz));
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+ syscall(SYS_settimeofday, NULL, &tz);
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+
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+ memset(&tz, 0, sizeof(tz));
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+#ifdef __USE_MISC
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+ tz.tz_minuteswest = -(tm_time.tm_gmtoff / 60);
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+#else
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+ tz.tz_minuteswest = -(tm_time.__tm_gmtoff / 60);
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+#endif
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+
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+ if (syscall(SYS_settimeofday, NULL, &tz))
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+ {
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+ bb_perror_msg("can't set kernel time zone");
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+ return EXIT_FAILURE;
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+ }
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+
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+ return EXIT_SUCCESS;
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+ }
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+
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/* Now we have parsed all the information except the date format
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* which depends on whether the clock is being set or read */
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