glibc/io/test-utime.c

/* Copyright (C) 1994,1996,1997,2000,2002,2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <utime.h>
#include <time.h>

int
main (int argc, char *argv[])
{
  char file[L_tmpnam];
  struct utimbuf ut;
  struct stat st;
  struct stat stnow;
  time_t now1, now2;
  int fd;

  if (tmpnam (file) == 0)
    {
      perror ("tmpnam");
      return 1;
    }

  fd = creat (file, 0666);
  if (fd < 0)
    {
      perror ("creat");
      return 1;
    }
  close (fd);

  /* Test utime with arg */
  ut.actime = 500000000;
  ut.modtime = 500000001;
  if (utime (file, &ut))
    {
      perror ("utime");
      remove (file);
      return 1;
    }

  if (stat (file, &st))
    {
      perror ("stat");
      remove (file);
      return 1;
    }

  /* Test utime with NULL.
     Since there's a race condition possible here, we check
     the time before and after the call to utime.  */
  now1 = time (NULL);
  if (now1 == (time_t)-1)
    {
      perror ("time");
      remove (file);
      return 1;
    }

  if (utime (file, NULL))
    {
      perror ("utime NULL");
      remove (file);
      return 1;
    }

  now2 = time (NULL);
  if (now2 == (time_t)-1)
    {
      perror ("time");
      remove (file);
      return 1;
    }

  if (stat (file, &stnow))
    {
      perror ("stat");
      remove (file);
      return 1;
    }

  remove (file);

  if (st.st_mtime != ut.modtime)
    {
      printf ("modtime %ld != %ld\n", st.st_mtime, ut.modtime);
      return 1;
    }

  if (st.st_atime != ut.actime)
    {
      printf ("actime %ld != %ld\n", st.st_atime, ut.actime);
      return 1;
    }

#ifdef _STATBUF_ST_NSEC
# define CORR (stnow.st_mtim.tv_nsec == 0 ? 0 : 1)
#else
# define CORR 0
#endif
  if (stnow.st_mtime + CORR < now1 || stnow.st_mtime > now2)
    {
      printf ("modtime %ld <%ld >%ld\n", stnow.st_mtime, now1, now2);
      return 1;
    }

  if (stnow.st_atime < now1 || stnow.st_atime > now2)
    {
      printf ("actime %ld <%ld >%ld\n", stnow.st_atime, now1, now2);
      return 1;
    }

  puts ("Test succeeded.");
  return 0;
}