MirOS Manual: utime(3)

UTIME(3)                   BSD Programmer's Manual                    UTIME(3)


     utime - set file times


     #include <sys/types.h>
     #include <utime.h>

     utime(const char *file, const struct utimbuf *timep);


     This interface is obsoleted by utimes(2).

     The utime() function sets the access and modification times of the named

     If timep is NULL, the access and modification times are set to the
     current time. The calling process must be the owner of the file or have
     permission to write the file.

     If timep is non-null, it specifies a pointer to a utimbuf structure, as
     defined in <utime.h>:

           struct utimbuf {
                   time_t actime;          /* Access time */
                   time_t modtime;         /* Modification time */

     The access time is set to the value of the actime member, and the modifi-
     cation time is set to the value of the modtime member. The times are
     measured in seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970,
     Coordinated Universal Time (UTC). The calling process must be the owner
     of the file or be the superuser.

     In either case, the inode change-time of the file is set to the current


     Upon successful completion, a value of 0 is returned. Otherwise, a value
     of -1 is returned and errno is set to indicate the error.


     utime() will fail if:

     [EACCES]      Search permission is denied for a component of the path
                   prefix; or the timep argument is NULL and the effective
                   user ID of the process does not match the owner of the
                   file, the effective user ID is not that of the superuser,
                   and write access is denied.

     [EFAULT]      file or timep points outside the process's allocated ad-
                   dress space.

     [EINVAL]      The pathname contains a character with the high-order bit

     [EIO]         An I/O error occurred while reading or writing the affected

     [ELOOP]       Too many symbolic links were encountered in translating the

                   A component of a pathname exceeded 255 characters, or an
                   entire path name exceeded 1023 characters.

     [ENOENT]      The named file does not exist.

     [ENOTDIR]     A component of the path prefix is not a directory.

     [EPERM]       The timep argument is not NULL and the calling process's
                   effective user ID does not match the owner of the file and
                   is not the superuser.

     [EROFS]       The file system containing the file is mounted read-only.


     stat(2), utimes(2)


     The utime() function conforms to IEEE Std 1003.1-1988 ("POSIX").


     A utime() function appeared in Version 7 AT&T UNIX.

MirOS BSD #10-current          August 13, 1993                               1

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