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#!/bin/sh |
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# gzexe: compressor for Unix executables. |
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# Use this only for binaries that you do not use frequently. |
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# |
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# The compressed version is a shell script which decompresses itself after |
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# skipping $skip lines of shell commands. We try invoking the compressed |
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# executable with the original name (for programs looking at their name). |
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# We also try to retain the original file permissions on the compressed file. |
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# For safety reasons, gzexe will not create setuid or setgid shell scripts. |
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|
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# WARNING: the first line of this file must be either : or #!/bin/sh |
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# The : is required for some old versions of csh. |
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# On Ultrix, /bin/sh is too buggy, change the first line to: #!/bin/sh5 |
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|
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|
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# Copyright (C) 1998, 2002, 2004, 2006, 2007 Free Software Foundation |
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# Copyright (C) 1993 Jean-loup Gailly |
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|
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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|
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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|
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# You should have received a copy of the GNU General Public License along |
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# with this program; if not, write to the Free Software Foundation, Inc., |
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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|
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tab=' ' |
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nl=' |
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' |
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IFS=" $tab$nl" |
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|
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version='gzexe (gzip) 1.3.12 |
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Copyright (C) 2007 Free Software Foundation, Inc. |
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This is free software. You may redistribute copies of it under the terms of |
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the GNU General Public License <http://www.gnu.org/licenses/gpl.html>. |
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There is NO WARRANTY, to the extent permitted by law. |
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|
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Written by Jean-loup Gailly.' |
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|
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usage="Usage: $0 [OPTION] FILE... |
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Rename each FILE with a compressed version of itself, renaming FILE to FILE~. |
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|
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-d Decompress each FILE instead of compressing it. |
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--help display this help and exit |
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--version output version information and exit |
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|
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Report bugs to <bug-gzip@gnu.org>." |
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|
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|
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PATH="${GZIP_BINDIR-'/usr/bin'}:$PATH" |
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|
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decomp=0 |
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res=0 |
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while :; do |
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case $1 in |
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-d) decomp=1; shift;; |
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--h*) exec echo "$usage";; |
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--v*) exec echo "$version";; |
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--) shift; break;; |
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*) break;; |
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esac |
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done |
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|
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if test $# -eq 0; then |
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echo >&2 "$0: missing operand |
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Try \`$0 --help' for more information." |
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exit 1 |
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fi |
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|
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tmp= |
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trap 'res=$? |
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test -n "$tmp" && rm -f "$tmp" |
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(exit $res); exit $res |
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' 0 1 2 3 5 10 13 15 |
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|
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mktemp_status= |
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|
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for i do |
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case $i in |
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-*) file=./$i;; |
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*) file=$i;; |
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esac |
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if test ! -f "$file" || test ! -r "$file"; then |
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res=$? |
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echo >&2 "$0: $i is not a readable regular file" |
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continue |
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fi |
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if test $decomp -eq 0; then |
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if sed -e 1d -e 2q "$file" | grep "^skip=[0-9][0-9]*$" >/dev/null; then |
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echo >&2 "$0: $i is already gzexe'd" |
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continue |
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fi |
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fi |
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if test -u "$file"; then |
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echo >&2 "$0: $i has setuid permission, unchanged" |
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continue |
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fi |
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if test -g "$file"; then |
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echo >&2 "$0: $i has setgid permission, unchanged" |
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continue |
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fi |
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case /$file in |
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*/basename | */bash | */cat | */chmod | */cp | \ |
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*/dirname | */echo | */expr | */gzip | \ |
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*/ln | */mkdir | */mktemp | */mv | */rm | \ |
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*/sed | */sh | */sleep | */test | */tail) |
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echo >&2 "$0: $i might depend on itself"; continue;; |
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esac |
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|
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dir=`dirname "$file"` || dir=$TMPDIR |
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test -d "$dir" && test -w "$dir" && test -x "$dir" || dir=/tmp |
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test -n "$tmp" && rm -f "$tmp" |
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if test -z "$mktemp_status"; then |
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type mktemp >/dev/null 2>&1 |
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mktemp_status=$? |
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fi |
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if test $mktemp_status -eq 0; then |
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tmp=`TMPDIR=$dir mktemp -t gzexeXXXXXX` |
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else |
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tmp=$dir/gzexe$$ |
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fi && { cp -p "$file" "$tmp" 2>/dev/null || cp "$file" "$tmp"; } || { |
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res=$? |
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echo >&2 "$0: cannot copy $file" |
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continue |
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} |
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if test -w "$tmp"; then |
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writable=1 |
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else |
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writable=0 |
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chmod u+w "$tmp" || { |
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res=$? |
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echo >&2 "$0: cannot chmod $tmp" |
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continue |
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} |
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fi |
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if test $decomp -eq 0; then |
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(cat <<'EOF' && |
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#!/bin/sh |
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skip=44 |
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|
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tab=' ' |
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nl=' |
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' |
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IFS=" $tab$nl" |
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|
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umask=`umask` |
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umask 77 |
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|
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gztmpdir= |
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trap 'res=$? |
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test -n "$gztmpdir" && rm -fr "$gztmpdir" |
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(exit $res); exit $res |
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' 0 1 2 3 5 10 13 15 |
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|
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if type mktemp >/dev/null 2>&1; then |
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gztmpdir=`mktemp -dt` |
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else |
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gztmpdir=/tmp/gztmp$$; mkdir $gztmpdir |
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fi || { (exit 127); exit 127; } |
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|
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gztmp=$gztmpdir/$0 |
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case $0 in |
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-* | */*' |
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') mkdir -p "$gztmp" && rm -r "$gztmp";; |
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*/*) gztmp=$gztmpdir/`basename "$0"`;; |
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esac || { (exit 127); exit 127; } |
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|
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case `echo X | tail -n +1 2>/dev/null` in |
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X) tail_n=-n;; |
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*) tail_n=;; |
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esac |
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if tail $tail_n +$skip <"$0" | gzip -cd > "$gztmp"; then |
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umask $umask |
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chmod 700 "$gztmp" |
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(sleep 5; rm -fr "$gztmpdir") 2>/dev/null & |
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"$gztmp" ${1+"$@"}; res=$? |
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else |
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echo >&2 "Cannot decompress $0" |
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(exit 127); res=127 |
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fi; exit $res |
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EOF |
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gzip -cv9 "$file") > "$tmp" || { |
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res=$? |
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echo >&2 "$0: compression not possible for $i, file unchanged." |
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continue |
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} |
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|
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else |
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# decompression |
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skip=44 |
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skip_line=`sed -e 1d -e 2q "$file"` |
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case $skip_line in |
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skip=[0-9] | skip=[0-9][0-9] | skip=[0-9][0-9][0-9]) |
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eval "$skip_line";; |
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esac |
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case `echo X | tail -n +1 2>/dev/null` in |
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X) tail_n=-n;; |
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*) tail_n=;; |
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esac |
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tail $tail_n +$skip "$file" | gzip -cd > "$tmp" || { |
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res=$? |
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echo >&2 "$0: $i probably not in gzexe format, file unchanged." |
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continue |
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} |
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fi |
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test $writable -eq 1 || chmod u-w "$tmp" || { |
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res=$? |
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echo >&2 "$0: $tmp: cannot chmod" |
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continue |
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} |
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ln -f "$file" "$file~" || { |
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res=$? |
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echo >&2 "$0: cannot backup $i as $i~" |
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continue |
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} |
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mv -f "$tmp" "$file" || { |
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res=$? |
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echo >&2 "$0: cannot rename $tmp to $i" |
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continue |
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} |
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tmp= |
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done |
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(exit $res); exit $res |
