![[BACK]](/icons/back.gif){kind=icon}
Return to znew CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / compress|
Return to znew CVS log | Up to [local] / src / usr.bin / compress |
1.1 otto 1: #!/bin/ksh -
2: #
1.3 ! jmc 3: # $OpenBSD: znew,v 1.2 2003/08/05 18:22:17 deraadt Exp $
1.1 otto 4: #
5: # Copyright (c) 2003 Otto Moerbeek <otto@drijf.net>
6: #
7: # Permission to use, copy, modify, and distribute this software for any
8: # purpose with or without fee is hereby granted, provided that the above
9: # copyright notice and this permission notice appear in all copies.
10: #
11: # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12: # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13: # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14: # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15: # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16: # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17: # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18: #
19:
20: # Return 0 if the first arg file size is smaller than the second, 1 otherwise.
21: smaller () {
22: a=`du -k "$1" | awk '{ print $1 }'`
23: b=`du -k "$2" | awk '{ print $1 }'`
24: test $a -lt $b
25: }
26:
1.2 deraadt 27: # Check gzip integrity if the -t flag is specified
1.1 otto 28: checkfile () {
29: if test $tflag -eq 1; then
30: gzip -qt < "$1"
31: fi
32: }
33:
34: # Decompress a file and then gzip it
35: process () {
36: prefix="${1%.Z}"
37: filez="$prefix".Z
38: filegz="$prefix".gz
39:
40: if test ! -e "$filez"; then
41: echo "$prog: $filez does not exist"
42: return 1
43: fi
44: if test ! -f "$filez"; then
45: echo "$prog: $filez is not a regular file"
46: return 1
47: fi
48: if test -e "$filegz" -a $fflag -eq 0; then
49: echo "$prog: $filegz already exists"
50: return 1
51: fi
52:
53: tmp=`mktemp /tmp/znewXXXXXXXXXX` || {
54: echo "$prog: cannot create tmp file"
55: return 1
56: }
57: trap 'rm -f "$tmp"; exit 1' HUP INT QUIT PIPE TERM
58:
59: # Do the actual work, producing a file "$tmp"
60: if uncompress -f -c < "$filez" | gzip -f $gzipflags -o "$tmp"; then
61:
62: if test $kflag -eq 1 && smaller "$filez" "$tmp"; then
63: echo -n "$prog: $filez is smaller than $filegz"
64: echo "; keeping it"
65: rm -f "$tmp"
66: return 0
67: fi
68: if ! checkfile "$tmp"; then
69: echo "$prog: integrity check of $tmp failed"
70: rm -f "$tmp"
71: return 1;
72: fi
73:
74: # Try to keep the mode of the original file
75: if ! cp -fp "$filez" "$filegz"; then
76: echo "$prog: warning: could not keep mode of $filez"
77: fi
78: if ! cp "$tmp" "$filegz" 2> /dev/null; then
79: echo "$prog: warning: could not keep mode of $filez"
80: if ! cp -f "$tmp" "$filegz" 2> /dev/null; then
81: echo "$prog: could not copy $tmp to $filegz"
82: rm -f "$filegz" "$tmp"
83: return 1
84: fi
85: fi
86: if ! touch -fr "$filez" "$filegz"; then
87: echo -n "$prog: warning: could not keep timestamp of "
88: echo "$filez"
89: fi
90: rm -f "$filez" "$tmp"
91: else
92: echo "$prog: failed to process $filez"
93: rm -f "$tmp"
94: return 1
95: fi
96: }
97:
98: prog=`basename "$0"`
1.3 ! jmc 99: usage="usage: $prog [-9fKtv] file ..."
1.1 otto 100:
101: fflag=0
102: tflag=0
103: kflag=0
104: gzipflags=
105:
106: # -P flag is recognized to maintain compatibility, but ignored. Pipe mode is
107: # always used
108: while getopts :ftv9PK i; do
109: case $i in
110: f) fflag=1;;
111: t) tflag=1;;
112: v) gzipflags="-v $gzipflags";;
113: 9) gzipflags="-9 $gzipflags";;
114: P) ;;
115: K) kflag=1;;
116: \?) echo "$usage"; exit 1;;
117: esac
118: done
119:
120: shift OPTIND-1
121:
122: if test $# -eq 0; then
123: echo "$usage"
124: exit 1
125: fi
126:
127: rc=0
128:
129: while test $# -ne 0; do
130: if ! process "$1"; then
131: rc=$?
132: fi
133: shift
134: done
135: exit $rc