utime(3) - NetBSD Manual Pages

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


NAME

     utime - set file times


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

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

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


DESCRIPTION

     This interface is obsoleted by utimes(2).

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

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

     If timep is non-NULL, time is assumed to be a pointer to a utimbuf struc-
     ture, 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 super-user.

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


RETURN VALUES

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


ERRORS

     utime() will fail if:

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

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

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

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

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

     [ENAMETOOLONG]
                   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 times argument is not NULL and the calling process's
                   effective user ID does not match the owner of the file and
                   is not the super-user.

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


SEE ALSO

     stat(2), utimes(2)


STANDARDS

     The utime() function conforms to IEEE Std1003.1-1990 (``POSIX'').


HISTORY

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

NetBSD 1.4                      August 13, 1993                              2