nsz Git - musl/blob - src/stat/utimensat.c

   1 #include <sys/stat.h>
   2 #include <sys/time.h>
   3 #include <fcntl.h>
   4 #include <errno.h>
   5 #include "syscall.h"
   6
   7 int utimensat(int fd, const char *path, const struct timespec times[2], int flags)
   8 {
   9         int r = __syscall(SYS_utimensat, fd, path, times, flags);
  10 #ifdef SYS_futimesat
  11         if (r != -ENOSYS || flags) return __syscall_ret(r);
  12         struct timeval *tv = 0, tmp[2];
  13         if (times) {
  14                 int i;
  15                 tv = tmp;
  16                 for (i=0; i<2; i++) {
  17                         if (times[i].tv_nsec >= 1000000000ULL) {
  18                                 if (times[i].tv_nsec == UTIME_NOW &&
  19                                     times[1-i].tv_nsec == UTIME_NOW) {
  20                                         tv = 0;
  21                                         break;
  22                                 }
  23                                 if (times[i].tv_nsec == UTIME_OMIT)
  24                                         return __syscall_ret(-ENOSYS);
  25                                 return __syscall_ret(-EINVAL);
  26                         }
  27                         tmp[i].tv_sec = times[i].tv_sec;
  28                         tmp[i].tv_usec = times[i].tv_nsec / 1000;
  29                 }
  30         }
  31
  32         r = __syscall(SYS_futimesat, fd, path, tv);
  33         if (r != -ENOSYS || fd != AT_FDCWD) return __syscall_ret(r);
  34         r = __syscall(SYS_utimes, path, tv);
  35 #endif
  36         return __syscall_ret(r);
  37 }