[1046] | 1 | #!/bin/sh
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| 2 | # gzexe: compressor for Unix executables.
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| 3 | # Use this only for binaries that you do not use frequently.
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| 4 | #
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| 5 | # The compressed version is a shell script which decompresses itself after
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| 6 | # skipping $skip lines of shell commands. We try invoking the compressed
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| 7 | # executable with the original name (for programs looking at their name).
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| 8 | # We also try to retain the original file permissions on the compressed file.
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| 9 | # For safety reasons, gzexe will not create setuid or setgid shell scripts.
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| 10 |
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| 11 | # WARNING: the first line of this file must be either : or #!/bin/sh
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| 12 | # The : is required for some old versions of csh.
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| 13 | # On Ultrix, /bin/sh is too buggy, change the first line to: #!/bin/sh5
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| 14 |
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| 15 |
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| 16 | # Copyright (C) 1998, 2002, 2004, 2006, 2007 Free Software Foundation
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| 17 | # Copyright (C) 1993 Jean-loup Gailly
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| 18 |
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| 19 | # This program is free software; you can redistribute it and/or modify
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| 20 | # it under the terms of the GNU General Public License as published by
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| 21 | # the Free Software Foundation; either version 2 of the License, or
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| 22 | # (at your option) any later version.
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| 23 |
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| 24 | # This program is distributed in the hope that it will be useful,
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| 25 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 26 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 27 | # GNU General Public License for more details.
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| 28 |
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| 29 | # You should have received a copy of the GNU General Public License along
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| 30 | # with this program; if not, write to the Free Software Foundation, Inc.,
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| 31 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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| 32 |
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| 33 | tab=' '
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| 34 | nl='
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| 35 | '
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| 36 | IFS=" $tab$nl"
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| 37 |
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| 38 | version='gzexe (gzip) 1.3.12
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| 39 | Copyright (C) 2007 Free Software Foundation, Inc.
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| 40 | This is free software. You may redistribute copies of it under the terms of
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| 41 | the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
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| 42 | There is NO WARRANTY, to the extent permitted by law.
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| 43 |
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| 44 | Written by Jean-loup Gailly.'
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| 45 |
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| 46 | usage="Usage: $0 [OPTION] FILE...
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| 47 | Rename each FILE with a compressed version of itself, renaming FILE to FILE~.
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| 48 |
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| 49 | -d Decompress each FILE instead of compressing it.
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| 50 | --help display this help and exit
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| 51 | --version output version information and exit
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| 52 |
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| 53 | Report bugs to <bug-gzip@gnu.org>."
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| 54 |
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| 55 |
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| 56 | PATH="${GZIP_BINDIR-'/usr/bin'}:$PATH"
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| 57 |
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| 58 | decomp=0
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| 59 | res=0
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| 60 | while :; do
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| 61 | case $1 in
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| 62 | -d) decomp=1; shift;;
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| 63 | --h*) exec echo "$usage";;
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| 64 | --v*) exec echo "$version";;
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| 65 | --) shift; break;;
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| 66 | *) break;;
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| 67 | esac
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| 68 | done
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| 69 |
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| 70 | if test $# -eq 0; then
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| 71 | echo >&2 "$0: missing operand
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| 72 | Try \`$0 --help' for more information."
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| 73 | exit 1
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| 74 | fi
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| 75 |
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| 76 | tmp=
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| 77 | trap 'res=$?
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| 78 | test -n "$tmp" && rm -f "$tmp"
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| 79 | (exit $res); exit $res
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| 80 | ' 0 1 2 3 5 10 13 15
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| 81 |
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| 82 | mktemp_status=
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| 83 |
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| 84 | for i do
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| 85 | case $i in
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| 86 | -*) file=./$i;;
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| 87 | *) file=$i;;
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| 88 | esac
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| 89 | if test ! -f "$file" || test ! -r "$file"; then
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| 90 | res=$?
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| 91 | echo >&2 "$0: $i is not a readable regular file"
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| 92 | continue
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| 93 | fi
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| 94 | if test $decomp -eq 0; then
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| 95 | if sed -e 1d -e 2q "$file" | grep "^skip=[0-9][0-9]*$" >/dev/null; then
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| 96 | echo >&2 "$0: $i is already gzexe'd"
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| 97 | continue
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| 98 | fi
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| 99 | fi
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| 100 | if test -u "$file"; then
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| 101 | echo >&2 "$0: $i has setuid permission, unchanged"
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| 102 | continue
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| 103 | fi
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| 104 | if test -g "$file"; then
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| 105 | echo >&2 "$0: $i has setgid permission, unchanged"
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| 106 | continue
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| 107 | fi
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| 108 | case /$file in
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| 109 | */basename | */bash | */cat | */chmod | */cp | \
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| 110 | */dirname | */echo | */expr | */gzip | \
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| 111 | */ln | */mkdir | */mktemp | */mv | */rm | \
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| 112 | */sed | */sh | */sleep | */test | */tail)
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| 113 | echo >&2 "$0: $i might depend on itself"; continue;;
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| 114 | esac
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| 115 |
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| 116 | dir=`dirname "$file"` || dir=$TMPDIR
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| 117 | test -d "$dir" && test -w "$dir" && test -x "$dir" || dir=/tmp
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| 118 | test -n "$tmp" && rm -f "$tmp"
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| 119 | if test -z "$mktemp_status"; then
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| 120 | type mktemp >/dev/null 2>&1
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| 121 | mktemp_status=$?
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| 122 | fi
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| 123 | if test $mktemp_status -eq 0; then
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| 124 | tmp=`TMPDIR=$dir mktemp -t gzexeXXXXXX`
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| 125 | else
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| 126 | tmp=$dir/gzexe$$
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| 127 | fi && { cp -p "$file" "$tmp" 2>/dev/null || cp "$file" "$tmp"; } || {
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| 128 | res=$?
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| 129 | echo >&2 "$0: cannot copy $file"
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| 130 | continue
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| 131 | }
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| 132 | if test -w "$tmp"; then
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| 133 | writable=1
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| 134 | else
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| 135 | writable=0
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| 136 | chmod u+w "$tmp" || {
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| 137 | res=$?
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| 138 | echo >&2 "$0: cannot chmod $tmp"
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| 139 | continue
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| 140 | }
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| 141 | fi
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| 142 | if test $decomp -eq 0; then
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| 143 | (cat <<'EOF' &&
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| 144 | #!/bin/sh
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| 145 | skip=44
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| 146 |
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| 147 | tab=' '
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| 148 | nl='
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| 149 | '
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| 150 | IFS=" $tab$nl"
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| 151 |
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| 152 | umask=`umask`
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| 153 | umask 77
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| 154 |
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| 155 | gztmpdir=
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| 156 | trap 'res=$?
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| 157 | test -n "$gztmpdir" && rm -fr "$gztmpdir"
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| 158 | (exit $res); exit $res
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| 159 | ' 0 1 2 3 5 10 13 15
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| 160 |
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| 161 | if type mktemp >/dev/null 2>&1; then
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| 162 | gztmpdir=`mktemp -dt`
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| 163 | else
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| 164 | gztmpdir=/tmp/gztmp$$; mkdir $gztmpdir
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| 165 | fi || { (exit 127); exit 127; }
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| 166 |
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| 167 | gztmp=$gztmpdir/$0
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| 168 | case $0 in
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| 169 | -* | */*'
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| 170 | ') mkdir -p "$gztmp" && rm -r "$gztmp";;
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| 171 | */*) gztmp=$gztmpdir/`basename "$0"`;;
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| 172 | esac || { (exit 127); exit 127; }
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| 173 |
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| 174 | case `echo X | tail -n +1 2>/dev/null` in
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| 175 | X) tail_n=-n;;
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| 176 | *) tail_n=;;
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| 177 | esac
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| 178 | if tail $tail_n +$skip <"$0" | gzip -cd > "$gztmp"; then
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| 179 | umask $umask
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| 180 | chmod 700 "$gztmp"
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| 181 | (sleep 5; rm -fr "$gztmpdir") 2>/dev/null &
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| 182 | "$gztmp" ${1+"$@"}; res=$?
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| 183 | else
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| 184 | echo >&2 "Cannot decompress $0"
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| 185 | (exit 127); res=127
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| 186 | fi; exit $res
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| 187 | EOF
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| 188 | gzip -cv9 "$file") > "$tmp" || {
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| 189 | res=$?
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| 190 | echo >&2 "$0: compression not possible for $i, file unchanged."
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| 191 | continue
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| 192 | }
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| 193 |
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| 194 | else
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| 195 | # decompression
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| 196 | skip=44
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| 197 | skip_line=`sed -e 1d -e 2q "$file"`
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| 198 | case $skip_line in
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| 199 | skip=[0-9] | skip=[0-9][0-9] | skip=[0-9][0-9][0-9])
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| 200 | eval "$skip_line";;
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| 201 | esac
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| 202 | case `echo X | tail -n +1 2>/dev/null` in
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| 203 | X) tail_n=-n;;
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| 204 | *) tail_n=;;
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| 205 | esac
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| 206 | tail $tail_n +$skip "$file" | gzip -cd > "$tmp" || {
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| 207 | res=$?
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| 208 | echo >&2 "$0: $i probably not in gzexe format, file unchanged."
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| 209 | continue
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| 210 | }
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| 211 | fi
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| 212 | test $writable -eq 1 || chmod u-w "$tmp" || {
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| 213 | res=$?
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| 214 | echo >&2 "$0: $tmp: cannot chmod"
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| 215 | continue
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| 216 | }
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| 217 | ln -f "$file" "$file~" || {
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| 218 | res=$?
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| 219 | echo >&2 "$0: cannot backup $i as $i~"
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| 220 | continue
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| 221 | }
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| 222 | mv -f "$tmp" "$file" || {
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| 223 | res=$?
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| 224 | echo >&2 "$0: cannot rename $tmp to $i"
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| 225 | continue
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| 226 | }
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| 227 | tmp=
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| 228 | done
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| 229 | (exit $res); exit $res
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