package/utils/busybox/patches/250-date-k-flag.patch

   1 --- a/coreutils/date.c
   2 +++ b/coreutils/date.c
   3 @@ -123,6 +123,7 @@
   4  //usage:       IF_FEATURE_DATE_ISOFMT(
   5  //usage:     "\n       -D FMT          Use FMT for -d TIME conversion"
   6  //usage:       )
   7 +//usage:     "\n       -k              Set Kernel timezone from localtime and exit"
   8  //usage:     "\n"
   9  //usage:     "\nRecognized TIME formats:"
  10  //usage:     "\n       hh:mm[:ss]"
  11 @@ -138,9 +139,8 @@
  12  //usage:       "Wed Apr 12 18:52:41 MDT 2000\n"
  13
  14  #include "libbb.h"
  15 -#if ENABLE_FEATURE_DATE_NANO
  16 -# include <sys/syscall.h>
  17 -#endif
  18 +#include <sys/time.h>
  19 +#include <sys/syscall.h>
  20
  21  enum {
  22         OPT_RFC2822   = (1 << 0), /* R */
  23 @@ -148,8 +148,9 @@ enum {
  24         OPT_UTC       = (1 << 2), /* u */
  25         OPT_DATE      = (1 << 3), /* d */
  26         OPT_REFERENCE = (1 << 4), /* r */
  27 -       OPT_TIMESPEC  = (1 << 5) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
  28 -       OPT_HINT      = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
  29 +       OPT_KERNELTZ  = (1 << 5), /* k */
  30 +       OPT_TIMESPEC  = (1 << 6) * ENABLE_FEATURE_DATE_ISOFMT, /* I */
  31 +       OPT_HINT      = (1 << 7) * ENABLE_FEATURE_DATE_ISOFMT, /* D */
  32  };
  33
  34  static void maybe_set_utc(int opt)
  35 @@ -167,12 +168,15 @@ static const char date_longopts[] ALIGN1
  36         /*      "universal\0" No_argument       "u" */
  37                 "date\0"      Required_argument "d"
  38                 "reference\0" Required_argument "r"
  39 +               "set-kernel-tz\0" No_argument   "k"
  40                 ;
  41  #endif
  42
  43  int date_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  44  int date_main(int argc UNUSED_PARAM, char **argv)
  45  {
  46 +       time_t tt;
  47 +       struct timezone tz;
  48         struct timespec ts;
  49         struct tm tm_time;
  50         char buf_fmt_dt2str[64];
  51 @@ -187,7 +191,7 @@ int date_main(int argc UNUSED_PARAM, cha
  52         opt_complementary = "d--s:s--d"
  53                 IF_FEATURE_DATE_ISOFMT(":R--I:I--R");
  54         IF_LONG_OPTS(applet_long_options = date_longopts;)
  55 -       opt = getopt32(argv, "Rs:ud:r:"
  56 +       opt = getopt32(argv, "Rs:ud:r:k"
  57                         IF_FEATURE_DATE_ISOFMT("I::D:"),
  58                         &date_str, &date_str, &filename
  59                         IF_FEATURE_DATE_ISOFMT(, &isofmt_arg, &fmt_str2dt));
  60 @@ -244,6 +248,31 @@ int date_main(int argc UNUSED_PARAM, cha
  61         if (*argv)
  62                 bb_show_usage();
  63
  64 +       /* Setting of kernel timezone was requested */
  65 +       if (opt & OPT_KERNELTZ) {
  66 +               tt = time(NULL);
  67 +               localtime_r(&tt, &tm_time);
  68 +
  69 +               /* workaround warp_clock() on first invocation */
  70 +               memset(&tz, 0, sizeof(tz));
  71 +               syscall(SYS_settimeofday, NULL, &tz);
  72 +
  73 +               memset(&tz, 0, sizeof(tz));
  74 +#ifdef __USE_MISC
  75 +               tz.tz_minuteswest = -(tm_time.tm_gmtoff / 60);
  76 +#else
  77 +               tz.tz_minuteswest = -(tm_time.__tm_gmtoff / 60);
  78 +#endif
  79 +
  80 +               if (syscall(SYS_settimeofday, NULL, &tz))
  81 +               {
  82 +                       bb_perror_msg("can't set kernel time zone");
  83 +                       return EXIT_FAILURE;
  84 +               }
  85 +
  86 +               return EXIT_SUCCESS;
  87 +       }
  88 +
  89         /* Now we have parsed all the information except the date format
  90          * which depends on whether the clock is being set or read */
  91