db8c40249f
pkgtasks is a shell script library to ease writing POSIX-compliant
shell scripts to handle common tasks during installation or removal
of a package, e.g.,
* creating groups and users needed by the package
* creating and removing directories with special permissions and
ownership,
* copying example config files to their final locations during
package installation, and removing them during package removal
if they don't differ from the example ones,
* reminding the user of files that may be customized after
package installation.
94 lines
2.7 KiB
Text
94 lines
2.7 KiB
Text
# Copyright (c) 2017 The NetBSD Foundation, Inc.
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# All rights reserved.
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#
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# This code is derived from software contributed to The NetBSD Foundation
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# by Johnny C. Lam.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# NAME
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# sort.subr -- sort lines from standard input
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#
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# SYNOPSIS
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# task_sort [-ru]
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#
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# DESCRIPTION
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# The task_sort function reads lines from standard input until EOF is
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# reached and writes them to standard output in lexographically-sorted
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# order.
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#
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# The options are as follows:
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#
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# -r Reverse: sort in reverse order.
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# -u Unique: suppress duplicate lines.
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#
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# RETURN VALUES
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# Returns 0 on success, and >0 if an error occurs.
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#
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# ENVIRONMENT
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# The following variables are used if they are set:
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#
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# AWK The name or path to the awk(1) utility.
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#
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__task_sort__="yes"
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task_sort()
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{
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: ${AWK:=awk}
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local cmp="<"
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local uniq=0
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local arg
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local OPTIND=1
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while getopts ":ru" arg "$@"; do
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case $arg in
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r) cmp=">" ;;
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u) uniq=1 ;;
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*) return 127 ;;
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esac
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done
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shift $(( ${OPTIND} - 1 ))
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${AWK} ' { line[NR] = $0 }
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END { # sort with insertion sort
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n = 0 # number of duplicates
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for ( i = 1; i <= NR; i++ ) {
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value = line[i]
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j = i - n - 1
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while ( j > 0 && value '"$cmp"' line[j] ) {
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j--
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}
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if ( '"$uniq"' > 0 && j > 0 && value == line[j] ) {
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# duplicate of jth value
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n++
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} else {
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for ( k = i - n - 1; k > j; k-- )
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line[k+1] = line[k]
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line[j+1] = value
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}
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}
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for ( i = 1; i <= NR - n; i++ )
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print line[i]
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}'
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}
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