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NetBSD 6.1.5 - man page for utime (netbsd section 3)

UTIME(3)			   BSD Library Functions Manual 			 UTIME(3)

     utime -- set file times

     Standard C Library (libc, -lc)

     #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 file.

     If timep is NULL, the access and modification times are set to the current time.  The call-
     ing 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 structure, as defined in

	   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 modification time is set
     to the value of the modtime member.  The times are measured in seconds since 0 hours, 0 min-
     utes, 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.

     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
			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 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.

     stat(2), utimes(2)

     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.

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

BSD					  April 29, 2010				      BSD

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