59 lines
2.3 KiB
Awk
59 lines
2.3 KiB
Awk
# $NetBSD: plist-functions.awk,v 1.4 2020/09/12 06:55:08 rillig Exp $
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#
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# Copyright (c) 2006 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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### join(array, start, end, separator) concatenates an array of strings
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### with a separator and returns the concatenated string. It is the
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### inverse of the built-in split() function.
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###
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function join(array, start, end, separator, result, i) {
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result = array[start]
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for (i = start + 1; i <= end; i++)
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result = result separator array[i]
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return result
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}
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###
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### print_entry(entry) prints the entry to standard output. If avoids
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### printing out duplicate entries by caching ones that have previously
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### been printed.
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###
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function print_entry(entry) {
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if (entries[entry] == "") {
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entries[entry] = entry
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print entry
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}
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}
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function getenv_or_die(varname) {
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if (varname in ENVIRON)
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return ENVIRON[varname]
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print "ERROR: "varname" must be defined." | "cat 1>&2"
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exit(1)
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}
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