| 1 | #!/bin/sh |
| 2 | # zforce: force a gz extension on all gzip files so that gzip will not |
| 3 | # compress them twice. |
| 4 | # |
| 5 | # This can be useful for files with names truncated after a file transfer. |
| 6 | # 12345678901234 is renamed to 12345678901.gz |
| 7 | |
| 8 | PATH="/usr/local/bin:$PATH"; export PATH |
| 9 | x=`basename $0` |
| 10 | if test $# = 0; then |
| 11 | echo "force a '.gz' extension on all gzip files" |
| 12 | echo usage: $x files... |
| 13 | exit 1 |
| 14 | fi |
| 15 | |
| 16 | res=0 |
| 17 | for i do |
| 18 | if test ! -f "$i" ; then |
| 19 | echo ${x}: $i not a file |
| 20 | res=1 |
| 21 | continue |
| 22 | fi |
| 23 | test `expr "$i" : '.*[.-]z$'` -eq 0 || continue |
| 24 | test `expr "$i" : '.*[.-]gz$'` -eq 0 || continue |
| 25 | test `expr "$i" : '.*[.]t[ag]z$'` -eq 0 || continue |
| 26 | |
| 27 | if gzip -l < "$i" 2>/dev/null | grep '^defl' > /dev/null; then |
| 28 | |
| 29 | if test `expr "$i" : '^............'` -eq 12; then |
| 30 | new=`expr "$i" : '\(.*\)...$`.gz |
| 31 | else |
| 32 | new="$i.gz" |
| 33 | fi |
| 34 | if mv "$i" "$new" 2>/dev/null; then |
| 35 | echo $i -- replaced with $new |
| 36 | continue |
| 37 | fi |
| 38 | res=1; echo ${x}: cannot rename $i to $new |
| 39 | fi |
| 40 | done |
| 41 | exit $res |