109 lines
2.4 KiB
Bash
109 lines
2.4 KiB
Bash
#!/bin/sh -
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#
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# $OpenBSD: zdiff,v 1.3 2019/01/25 00:19:26 millert Exp $
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#
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# Copyright (c) 2003 Todd C. Miller <millert@openbsd.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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# Sponsored in part by the Defense Advanced Research Projects
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# Agency (DARPA) and Air Force Research Laboratory, Air Force
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# Materiel Command, USAF, under agreement number F39502-99-1-0512.
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#
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# Set $prog based on $0
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case $0 in
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*cmp) prog=cmp
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;;
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*) prog=diff
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;;
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esac
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USAGE="usage: z$prog [options] file1 [file2]"
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# Pull out any command line flags so we can pass them to diff/cmp
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# XXX - assumes there is no optarg
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flags=
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while test $# -ne 0; do
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case "$1" in
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--)
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shift
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break
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;;
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-*)
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flags="$flags $1"
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shift
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;;
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*)
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break
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;;
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esac
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done
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if [ $# -eq 1 ]; then
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# One file given, compare compressed to uncompressed
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files="$1"
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case "$1" in
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*[._-][Zz])
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files="${1%??}"
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;;
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*[._-]gz)
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files="${1%???}"
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;;
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*.t[ag]z)
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files="${1%??}"ar
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;;
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*) echo "z$prog: unknown suffix" 1>&2
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exit 1
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esac
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compress -cdfq "$1" | $prog $flags - "$files"
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status=$?
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elif [ $# -eq 2 ]; then
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# Two files given, compare the two uncompressing as needed
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case "$1" in
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*[._-][Zz]|*[._-]gz|*.t[ag]z)
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files=-
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filt="compress -cdfq $1"
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;;
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*)
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files="$1"
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;;
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esac
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case "$2" in
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*[._-][Zz]|*[._-]gz|*.t[ag]z)
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if [ "$files" = "-" ]; then
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tmp=`mktemp -t z$prog.XXXXXXXXXX` || exit 1
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trap "rm -f $tmp" 0 1 2 3 13 15
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compress -cdfq "$2" > $tmp
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files="$files $tmp"
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else
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files="$files -"
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filt="compress -cdfq $2"
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fi
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;;
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*)
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files="$files $2"
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;;
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esac
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if [ -n "$filt" ]; then
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$filt | $prog $flags $files
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else
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$prog $flags $files
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fi
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status=$?
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else
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echo "$USAGE" 1>&2
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exit 1
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fi
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exit $status
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