Annotation of src/usr.bin/touch/touch.1, Revision 1.28
1.28 ! jmc 1: .\" $OpenBSD: touch.1,v 1.27 2011/09/09 15:33:14 jmc Exp $
1.1 deraadt 2: .\" $NetBSD: touch.1,v 1.8 1995/08/31 22:10:05 jtc Exp $
3: .\"
4: .\" Copyright (c) 1991, 1993
5: .\" The Regents of the University of California. All rights reserved.
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7: .\" This code is derived from software contributed to Berkeley by
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1.8 millert 18: .\" 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 19: .\" may be used to endorse or promote products derived from this software
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34: .\" @(#)touch.1 8.3 (Berkeley) 4/28/95
35: .\"
1.28 ! jmc 36: .Dd $Mdocdate: September 9 2011 $
1.1 deraadt 37: .Dt TOUCH 1
38: .Os
39: .Sh NAME
40: .Nm touch
41: .Nd change file access and modification times
42: .Sh SYNOPSIS
43: .Nm touch
1.10 otto 44: .Op Fl acm
1.19 jmc 45: .Sm off
1.24 jmc 46: .Op Fl "d " Ar ccyy No - Ar mm No - Ar ddTHH : Ar MM : Ar SS Oo \&. Ar frac Oc Op Ar Z
1.19 jmc 47: .Sm on
1.1 deraadt 48: .Op Fl r Ar file
1.24 jmc 49: .Op Fl t Oo Ns Oo Ar cc Oc Ns Ar yy Oc Ns Ar mmddHHMM Ns Op \&. Ns Ar SS
1.14 sobrado 50: .Ar
1.1 deraadt 51: .Sh DESCRIPTION
52: The
1.5 aaron 53: .Nm
1.1 deraadt 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
1.4 aaron 58: The options are as follows:
1.1 deraadt 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
1.5 aaron 68: .Nm
1.1 deraadt 69: utility does not treat this as an error.
70: No error messages are displayed and the exit value is not affected.
1.19 jmc 71: .Sm off
1.24 jmc 72: .It Fl "d " Ar ccyy No - Ar mm No - Ar ddTHH : Ar MM : Ar SS Oo \&. Ar frac Oc Op Ar Z
1.19 jmc 73: .Sm on
1.25 jmc 74: Change the access and modification times to the specified time,
1.27 jmc 75: in a format compliant with the
1.28 ! jmc 76: .St -iso8601
1.27 jmc 77: standard.
1.26 jmc 78: The parts of the argument represent the following:
1.18 guenther 79: .Pp
80: .Bl -tag -width .frac -compact -offset indent
1.24 jmc 81: .It Ar ccyy
82: Year.
83: .It Ar mm
84: Month:
85: a number from 1 to 12.
86: .It Ar dd
87: Day:
88: a number from 1 to 31.
1.18 guenther 89: .It Ar T
90: Either the capital letter
91: .Sq T
92: or a single space.
1.24 jmc 93: .It Ar HH
94: Hour:
95: a number from 0 to 23.
96: .It Ar MM
97: Minute:
98: a number from 0 to 59.
1.18 guenther 99: .It Ar SS
1.24 jmc 100: Second:
101: a number from 0 to 60
102: (permitting a leap second).
103: .It Ar frac
1.21 jmc 104: The decimal fraction of the second,
105: either a period or comma,
106: followed by one or more decimal digits.
1.18 guenther 107: .It Ar Z
108: The timezone specifier, a capital letter
109: .Sq Z
110: indicating that the time is in UTC.
111: If not specified, the time is in the local timezone.
112: .El
1.1 deraadt 113: .It Fl m
114: Change the modification time of the file.
115: The access time of the file is not changed unless the
116: .Fl a
117: flag is also specified.
1.11 jmc 118: .It Fl r Ar file
1.7 henning 119: Use the access and modification times from the specified file
1.1 deraadt 120: instead of the current time of day.
1.24 jmc 121: .It Fl t Oo Ns Oo Ar cc Oc Ns Ar yy Oc Ns Ar mmddHHMM Ns Op \&. Ns Ar SS
1.25 jmc 122: Change the access and modification times to the specified time,
1.20 jmc 123: where the parts of the argument represent the following:
1.1 deraadt 124: .Pp
125: .Bl -tag -width Ds -compact -offset indent
1.24 jmc 126: .It Ar ccyy
127: Year.
128: If yy is specified, but cc is not,
129: a value for yy between 69 and 99 results in a cc value of 19.
130: Otherwise, a cc value of 20 is used.
131: .It Ar mm
132: Month:
133: a number from 1 to 12.
134: .It Ar dd
135: Day:
136: a number from 1 to 31.
137: .It Ar HH
138: Hour:
139: a number from 0 to 23.
1.1 deraadt 140: .It Ar MM
1.24 jmc 141: Minute:
142: a number from 0 to 59.
143: .It Ar SS
144: Second:
145: a number from 0 to 60
146: (permitting a leap second),
1.21 jmc 147: preceded by a period.
1.24 jmc 148: The default is 0.
1.1 deraadt 149: .El
150: .El
1.17 jmc 151: .Sh EXIT STATUS
1.15 sobrado 152: .Ex -std touch
1.1 deraadt 153: .Sh SEE ALSO
1.22 jmc 154: .Xr date 1
1.9 jmc 155: .Sh STANDARDS
1.12 jmc 156: The
157: .Nm
158: utility is compliant with the
1.16 jmc 159: .St -p1003.1-2008
1.12 jmc 160: specification.
161: .Pp
1.1 deraadt 162: The obsolescent form of
163: .Nm touch ,
164: where a time format is specified as the first argument, is supported.
165: When no
1.21 jmc 166: .Fl d , r ,
1.1 deraadt 167: or
168: .Fl t
169: option is specified, there are at least two arguments, and the first
170: argument is a string of digits either eight or ten characters in length,
171: the first argument is interpreted as a time specification of the form
1.24 jmc 172: .Dq mmddHHMM[yy] .
1.5 aaron 173: .Sh HISTORY
174: A
175: .Nm
176: utility appeared in
1.6 pjanzen 177: .At v7 .
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