compiler/posixc/utime.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     POSIX.1-2008 function utime().
   6 */
   7
   8 #include <errno.h>
   9 #include <time.h>
  10 #include <sys/time.h>
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15
  16 #include <utime.h>
  17
  18         int utime(
  19
  20 /*  SYNOPSIS */
  21         const char *filename,
  22         const struct utimbuf *buf)
  23
  24 /*  FUNCTION
  25         Change last access and last modification time of the given file to
  26         times specified in given utimbuf structure. If buf is NULL, the
  27         current time will be used instead.
  28
  29         The utimbuf structure contains of two fields:
  30
  31         time_t actime;  - last access time
  32         time_t modtime; - last modification time
  33
  34     INPUTS
  35         filename - Name of the file
  36         buf - Pointer to utimbuf structure describing specified time.
  37
  38     RESULT
  39         0 on success and -1 on error. If an error occurred, the global
  40         variable errno is set.
  41
  42     NOTES
  43         This function can be used to set access and modification times with
  44         a resolution of 1 second, use utimes() if you need better precision.
  45
  46     EXAMPLE
  47
  48     BUGS
  49         Since AROS has no notion of last access time, actime field is silently
  50         ignored, only modification time of the file is set.
  51
  52     SEE ALSO
  53         utimes()
  54
  55     INTERNALS
  56
  57 ******************************************************************************/
  58 {
  59     struct timeval ts[2];
  60
  61     if( buf == NULL )
  62     {
  63         time_t tt = time( NULL );
  64
  65         ts[0].tv_sec = tt;
  66         ts[1].tv_sec = tt;
  67     }
  68     else
  69     {
  70         ts[0].tv_sec = buf->actime;
  71         ts[1].tv_sec = buf->modtime;
  72     }
  73
  74     ts[0].tv_usec = 0;
  75     ts[1].tv_usec = 0;
  76
  77     return utimes(filename, ts);
  78 }