diff options
Diffstat (limited to 'gnu/usr.bin/gzip/gzexe.in')
| -rw-r--r-- | gnu/usr.bin/gzip/gzexe.in | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/gnu/usr.bin/gzip/gzexe.in b/gnu/usr.bin/gzip/gzexe.in index dcbab88..a28ec3d 100644 --- a/gnu/usr.bin/gzip/gzexe.in +++ b/gnu/usr.bin/gzip/gzexe.in @@ -9,8 +9,9 @@ # We also try to retain the original file permissions on the compressed file. # For safety reasons, gzexe will not create setuid or setgid shell scripts. -# Warning: the first line of this file must be either : or #!/bin/sh +# WARNING: the first line of this file must be either : or #!/bin/sh # The : is required for some old versions of csh. +# On Ultrix, /bin/sh is too buggy, change the first line to: #!/bin/sh5 x=`basename $0` if test $# = 0; then @@ -38,6 +39,21 @@ if test -z "`(${CPMOD-cpmod} zfoo1$$ zfoo2$$) 2>&1`"; then fi rm -f zfoo[12]$$ +tail="" +IFS="${IFS= }"; saveifs="$IFS"; IFS="${IFS}:" +for dir in $PATH; do + test -z "$dir" && dir=. + if test -f $dir/tail; then + tail="$dir/tail" + break + fi +done +IFS="$saveifs" +if test -z "$tail"; then + echo cannot find tail + exit 1 +fi + for i do if test ! -f "$i" ; then echo ${x}: $i not a file @@ -58,10 +74,10 @@ for i do echo "${x}: $i has setgid permission, unchanged" continue fi - if test "`basename $i`" = gzip; then - echo "${x}: cannot compress gzip itself" - continue - fi + case "`basename $i`" in + gzip | tail | chmod | ln | sleep | rm) + echo "${x}: $i would depend on itself"; continue ;; + esac if test -z "$cpmod"; then cp -p "$i" $tmp 2>/dev/null || cp "$i" $tmp if test -w $tmp 2>/dev/null; then @@ -73,25 +89,25 @@ for i do fi if test $decomp -eq 0; then sed 1q $0 > $tmp - cat >> $tmp <<'EOF' + sed "s|^if tail|if $tail|" >> $tmp <<'EOF' skip=18 -if tail +$skip $0 | gzip -cd > /tmp/gztmp$$; then - chmod 755 /tmp/gztmp$$ - prog="`basename $0`" - if ln /tmp/gztmp$$ "/tmp/$prog" 2>/dev/null; then +if tail +$skip $0 | "BINDIR"/gzip -cd > /tmp/gztmp$$; then + /bin/chmod 700 /tmp/gztmp$$ + prog="`echo $0 | /bin/sed 's|^.*/||`" + if /bin/ln /tmp/gztmp$$ "/tmp/$prog" 2>/dev/null; then trap '/bin/rm -f /tmp/gztmp$$ "/tmp/$prog"; exit $res' 0 - (sleep 5; /bin/rm -f /tmp/gztmp$$ "/tmp/$prog") 2>/dev/null & + (/bin/sleep 5; /bin/rm -f /tmp/gztmp$$ "/tmp/$prog") 2>/dev/null & /tmp/"$prog" ${1+"$@"}; res=$? else trap '/bin/rm -f /tmp/gztmp$$; exit $res' 0 - (sleep 5; /bin/rm -f /tmp/gztmp$$) 2>/dev/null & + (/bin/sleep 5; /bin/rm -f /tmp/gztmp$$) 2>/dev/null & /tmp/gztmp$$ ${1+"$@"}; res=$? fi else echo Cannot decompress $0; exit 1 fi; exit $res EOF - gzip -cv9 "$i" >> $tmp || { + "BINDIR"/gzip -cv9 "$i" >> $tmp || { /bin/rm -f $tmp echo ${x}: compression not possible for $i, file unchanged. res=1 @@ -104,7 +120,7 @@ EOF if sed -e 1d -e 2q "$i" | grep "^skip=[0-9]*$" >/dev/null; then eval `sed -e 1d -e 2q "$i"` fi - if tail +$skip "$i" | gzip -cd > $tmp; then + if tail +$skip "$i" | "BINDIR"/gzip -cd > $tmp; then : else echo ${x}: $i probably not in gzexe format, file unchanged. |
