Annotation of src/usr.bin/touch/touch.1, Revision 1.1
1.1 ! deraadt 1: .\" $NetBSD: touch.1,v 1.8 1995/08/31 22:10:05 jtc Exp $
! 2: .\"
! 3: .\" Copyright (c) 1991, 1993
! 4: .\" The Regents of the University of California. All rights reserved.
! 5: .\"
! 6: .\" This code is derived from software contributed to Berkeley by
! 7: .\" the Institute of Electrical and Electronics Engineers, Inc.
! 8: .\"
! 9: .\" Redistribution and use in source and binary forms, with or without
! 10: .\" modification, are permitted provided that the following conditions
! 11: .\" are met:
! 12: .\" 1. Redistributions of source code must retain the above copyright
! 13: .\" notice, this list of conditions and the following disclaimer.
! 14: .\" 2. Redistributions in binary form must reproduce the above copyright
! 15: .\" notice, this list of conditions and the following disclaimer in the
! 16: .\" documentation and/or other materials provided with the distribution.
! 17: .\" 3. All advertising materials mentioning features or use of this software
! 18: .\" must display the following acknowledgement:
! 19: .\" This product includes software developed by the University of
! 20: .\" California, Berkeley and its contributors.
! 21: .\" 4. Neither the name of the University nor the names of its contributors
! 22: .\" may be used to endorse or promote products derived from this software
! 23: .\" without specific prior written permission.
! 24: .\"
! 25: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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! 34: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: .\" SUCH DAMAGE.
! 36: .\"
! 37: .\" @(#)touch.1 8.3 (Berkeley) 4/28/95
! 38: .\"
! 39: .Dd April 28, 1995
! 40: .Dt TOUCH 1
! 41: .Os
! 42: .Sh NAME
! 43: .Nm touch
! 44: .Nd change file access and modification times
! 45: .Sh SYNOPSIS
! 46: .Nm touch
! 47: .Op Fl acfm
! 48: .Op Fl r Ar file
! 49: .Op Fl t Ar [[CC]YY]MMDDhhmm[.SS]
! 50: .Ar file ...
! 51: .Sh DESCRIPTION
! 52: The
! 53: .Nm touch
! 54: utility sets the modification and access times of files to the
! 55: current time of day.
! 56: If the file doesn't exist, it is created with default permissions.
! 57: .Pp
! 58: The following options are available:
! 59: .Bl -tag -width Ds
! 60: .It Fl a
! 61: Change the access time of the file.
! 62: The modification time of the file is not changed unless the
! 63: .Fl m
! 64: flag is also specified.
! 65: .It Fl c
! 66: Do not create the file if it does not exist.
! 67: The
! 68: .Nm touch
! 69: utility does not treat this as an error.
! 70: No error messages are displayed and the exit value is not affected.
! 71: .It Fl f
! 72: Attempt to force the update, even if the file permissions do not
! 73: currently permit it.
! 74: .It Fl m
! 75: Change the modification time of the file.
! 76: The access time of the file is not changed unless the
! 77: .Fl a
! 78: flag is also specified.
! 79: .It Fl r
! 80: Use the access and modifications times from the specified file
! 81: instead of the current time of day.
! 82: .It Fl t
! 83: Change the access and modification times to the specified time.
! 84: The argument should be in the form
! 85: .Dq [[CC]YY]MMDDhhmm[.SS]
! 86: where each pair of letters represents the following:
! 87: .Pp
! 88: .Bl -tag -width Ds -compact -offset indent
! 89: .It Ar CC
! 90: The first two digits of the year (the century).
! 91: .It Ar YY
! 92: The second two digits of the year.
! 93: If
! 94: .Dq YY
! 95: is specified, but
! 96: .Dq CC
! 97: is not, a value for
! 98: .Dq YY
! 99: between 69 and 99 results in a
! 100: .Dq CC
! 101: value of 19.
! 102: Otherwise, a
! 103: .Dq CC
! 104: value of 20 is used.
! 105: .It Ar MM
! 106: The month of the year, from 1 to 12.
! 107: .It Ar DD
! 108: the day of the month, from 1 to 31.
! 109: .It Ar hh
! 110: The hour of the day, from 0 to 23.
! 111: .It Ar mm
! 112: The minute of the hour, from 0 to 59.
! 113: .It Ar SS
! 114: The second of the minute, from 0 to 61.
! 115: .El
! 116: .Pp
! 117: If the
! 118: .Dq CC
! 119: and
! 120: .Dq YY
! 121: letter pairs are not specified, the values default to the current
! 122: year.
! 123: If the
! 124: .Dq SS
! 125: letter pair is not specified, the value defaults to 0.
! 126: .El
! 127: .Pp
! 128: The
! 129: .Nm touch
! 130: utility exits 0 on success, and >0 if an error occurs.
! 131: .Sh SEE ALSO
! 132: .Xr utimes 2
! 133: .Sh COMPATIBILITY
! 134: The obsolescent form of
! 135: .Nm touch ,
! 136: where a time format is specified as the first argument, is supported.
! 137: When no
! 138: .Fl r
! 139: or
! 140: .Fl t
! 141: option is specified, there are at least two arguments, and the first
! 142: argument is a string of digits either eight or ten characters in length,
! 143: the first argument is interpreted as a time specification of the form
! 144: .Dq MMDDhhmm[YY] .
! 145: .Pp
! 146: The
! 147: .Dq MM ,
! 148: .Dq DD ,
! 149: .Dq hh
! 150: and
! 151: .Dq mm
! 152: letter pairs are treated as their counterparts specified to the
! 153: .Fl t
! 154: option.
! 155: If the
! 156: .Dq YY
! 157: letter pair is in the range 69 to 99, the year is set to 1969 to 1999,
! 158: otherwise, the year is set in the 21st century.
! 159: .Sh HISTORY
! 160: A
! 161: .Nm touch
! 162: utility appeared in
! 163: .At v7 .
! 164: .Sh STANDARDS
! 165: The
! 166: .Nm touch
! 167: utility is expected to be a superset of the
! 168: .St -p1003.2
! 169: specification.
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