utime(3) - NetBSD Manual Pages

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UTIME(3)                NetBSD Library Functions Manual               UTIME(3)


NAME

     utime -- set file times


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #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 user 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
                        address 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 translat-
                        ing the pathname.

     [ENAMETOOLONG]     A component of a pathname exceeded {NAME_MAX} charac-
                        ters, or an entire path name exceeded {PATH_MAX} char-
                        acters.

     [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 ISO/IEC 9945-1:1990 (``POSIX.1'').  It
     was however marked as legacy in the IEEE Std 1003.1-2008 (``POSIX.1'')
     revision of the standard.


HISTORY

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

NetBSD 10.1                     April 29, 2010                     NetBSD 10.1