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.
134 lines
3.8 KiB
Text
134 lines
3.8 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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# makedir.subr -- make a directory hierarchy
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#
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# SYNOPSIS
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# task_makedir [-m mode] <directory> ...
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#
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# DESCRIPTION
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# The task_makedir function creates the directories in the order
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# specified. If the intermediate directories do not exist, then they
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# are created as well.
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#
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# The options are as follows:
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#
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# -i Always create intermediate directories as separate steps.
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# If this option is not given, then by default, the function
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# will attempt to use "mkdir -p" to create the intermediate
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# directories.
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#
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# -m Set the permissions of the final created directory to
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# the specified mode.
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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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# CHMOD The name or path to the chmod(1) utility.
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#
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# MKDIR The name or path to the mkdir(1) utility.
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#
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__task_makedir__="yes"
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task_makedir()
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{
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: ${CHMOD:=chmod}
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: ${MKDIR:=mkdir}
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local execute="yes"
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local intermediate=
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local mode=
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local opts="-p" # always create intermediate directories
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local arg
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local OPTIND=1
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while getopts ":im:n" arg "$@"; do
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case $arg in
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i) intermediate="yes" ;;
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m) mode=${OPTARG}
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opts="$opts -m $mode" ;;
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n) execute= ;;
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*) return 127 ;;
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esac
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done
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shift $(( ${OPTIND} - 1 ))
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# Attempt to do "mkdir -p" if "-i" was not given.
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if [ -z "$intermediate" ]; then
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case $execute in
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"") : "fall through" ;;
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*) { ${MKDIR} ${opts# } "$@"; } 2>/dev/null
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[ $? -gt 0 ] || return 0 ;;
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esac
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fi
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local path=
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local prev="/" # seed with / to prevent attempting "mkdir /"
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local save_IFS
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local dir component
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for dir; do
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[ -n "$dir" ] || return 1
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save_IFS=$IFS; IFS=/
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set -o noglob; set -- $dir; set +o noglob
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IFS=$save_IFS
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while [ $# -gt 0 ]; do
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component=$1; shift
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case $component in
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"") case $path in
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"") path="/" ;;
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*) : "path unchanged" ;;
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esac ;;
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*) case $path in
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"") path="$component" ;;
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*/) path="$path$component" ;;
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*) path="$path/$component" ;;
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esac ;;
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esac
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if [ "$path" != "$prev" ]; then
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case $execute in
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"") echo "${MKDIR} \"$path\"" ;;
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*) if [ ! -d "$path" ]; then
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${MKDIR} "$path" 2>/dev/null
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[ -d "$path" ] || return 1
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fi
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esac
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prev=$path
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fi
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done
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if [ -n "$mode" ]; then
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case $execute in
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"") echo "${CHMOD} \"$mode\" \"$dir\"" ;;
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*) ${CHMOD} "$mode" "$dir" || return 1 ;;
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esac
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fi
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done
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}
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