Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
TOUCH(1)		  BSD General Commands Manual		      TOUCH(1)

     touch -- change file access and modification times

     touch [-acfhm] [-r	file] [-t [[CC]YY]MMDDhhmm[.SS]] file ...

     The touch utility sets the	modification and access	times of files to the
     current time of day.  If the file doesn't exist, it is created with de-
     fault permissions.

     The following options are available:

     -a	     Change the	access time of the file.  The modification time	of the
	     file is not changed unless	the -m flag is also specified.

     -c	     Do	not create the file if it does not exist.  The touch utility
	     does not treat this as an error.  No error	messages are displayed
	     and the exit value	is not affected.

     -f	     Attempt to	force the update, even if the file permissions do not
	     currently permit it.

     -h	     If	the file is a symbolic link, change the	times of the link it-
	     self rather than the file that the	link points to.	 Note that -h
	     implies -c	and thus will not create any new files.

     -m	     Change the	modification time of the file.	The access time	of the
	     file is not changed unless	the -a flag is also specified.

     -r	     Use the access and	modifications times from the specified file
	     instead of	the current time of day.

     -t	     Change the	access and modification	times to the specified time.
	     The argument should be in the form	"[[CC]YY]MMDDhhmm[.SS]"	where
	     each pair of letters represents the following:

		   CC	   The first two digits	of the year (the century).
		   YY	   The second two digits of the	year.  If "YY" is
			   specified, but "CC" is not, a value for "YY"	be-
			   tween 69 and	99 results in a	"CC" value of 19.
			   Otherwise, a	"CC" value of 20 is used.
		   MM	   The month of	the year, from 1 to 12.
		   DD	   the day of the month, from 1	to 31.
		   hh	   The hour of the day,	from 0 to 23.
		   mm	   The minute of the hour, from	0 to 59.
		   SS	   The second of the minute, from 0 to 61.

	     If	the "CC" and "YY" letter pairs are not specified, the values
	     default to	the current year.  If the "SS" letter pair is not
	     specified,	the value defaults to 0.

     The touch utility exits 0 on success, and >0 if an	error occurs.


     The obsolescent form of touch, where a time format	is specified as	the
     first argument, is	supported.  When no -r or -t option is specified,
     there are at least	two arguments, and the first argument is a string of
     digits either eight or ten	characters in length, the first	argument is
     interpreted as a time specification of the	form "MMDDhhmm[YY]".

     The "MM", "DD", "hh" and "mm" letter pairs	are treated as their counter-
     parts specified to	the -t option.	If the "YY" letter pair	is in the
     range 39 to 99, the year is set to	1939 to	1999, otherwise, the year is
     set in the	21st century.

     A touch utility appeared in Version 7 AT&T	UNIX.

     The touch utility is expected to be a superset of the IEEE	Std 1003.2
     ("POSIX.2") specification.

BSD				April 28, 1995				   BSD


Want to link to this manual page? Use this URL:

home | help