.fp 5 CW
.de Af
.ds ;G \\*(;G\\f\\$1\\$3\\f\\$2
.if !\\$4 .Af \\$2 \\$1 "\\$4" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9"
..
.de aF
.ie \\$3 .ft \\$1
.el \{\
.ds ;G \&
.nr ;G \\n(.f
.Af "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9"
\\*(;G
.ft \\n(;G \}
..
.de L
.aF 5 \\n(.f "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7"
..
.de LR
.aF 5 1 "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7"
..
.de RL
.aF 1 5 "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" "\\$7"
..
.de EX \" start example
.ta 1i 2i 3i 4i 5i 6i
.PP
.RS
.PD 0
.ft 5
.nf
..
.de EE \" end example
.fi
.ft
.PD
.RE
.PP
..
.TH TOUCH 3
.SH NAME
touch \- set file access and modify times
.SH SYNOPSIS
.L "#include <ast.h>"
.sp
.L "int touch(const char* path, time_t atime, time_t mtime, int force);"
.SH DESCRIPTION
.L touch
sets the access and modify times of the file named by
.LR path .
If
.L "force != 0"
then the file is created if it doesn't exist;
otherwise the file is not created and
.L \-1
is returned.
If
.L "force < 0"
then
.L atime
and
.L mtime
are taken verbatim; otherwise
.L "(time_t)(-1)"
retains the current value for the file and
.L "(time_t)(0)"
uses the current time.
.SH CAVEATS
By default the change time is always changed to the current time.