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3013fe88 NW |
1 | #!/bin/sh |
2 | ||
caed0dfe | 3 | PATH="/usr/local/bin:$PATH"; export PATH |
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4 | check=0 |
5 | pipe=0 | |
6 | opt= | |
7 | files= | |
8 | keep=0 | |
9 | res=0 | |
10 | old=0 | |
11 | new=0 | |
12 | block=1024 | |
13 | # block is the disk block size (best guess, need not be exact) | |
14 | ||
15 | warn="(does not preserve modes and timestamp)" | |
16 | tmp=/tmp/zfoo.$$ | |
17 | echo hi > $tmp.1 | |
18 | echo hi > $tmp.2 | |
19 | if test -z "`(${CPMOD-cpmod} $tmp.1 $tmp.2) 2>&1`"; then | |
20 | cpmod=${CPMOD-cpmod} | |
21 | warn="" | |
22 | fi | |
23 | ||
24 | if test -z "$cpmod" && ${TOUCH-touch} -r $tmp.1 $tmp.2 2>/dev/null; then | |
25 | cpmod="${TOUCH-touch}" | |
26 | cpmodarg="-r" | |
27 | warn="(does not preserve file modes)" | |
28 | fi | |
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29 | |
30 | # check if GZIP env. variable uses -S or --suffix | |
31 | gzip -q $tmp.1 | |
32 | ext=`echo $tmp.1* | sed "s|$tmp.1||"` | |
33 | rm -f $tmp.[12]* | |
34 | if test -z "$ext"; then | |
35 | echo znew: error determining gzip extension | |
36 | exit 1 | |
37 | fi | |
38 | if test "$ext" = ".Z"; then | |
39 | echo znew: cannot use .Z as gzip extension. | |
40 | exit 1 | |
41 | fi | |
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42 | |
43 | A= | |
44 | fileno=0 | |
45 | ||
46 | for arg | |
47 | do | |
48 | case "$arg" in | |
49 | -*) opt="$opt $arg";; | |
50 | *) fileno=`expr $fileno + 1` | |
51 | eval A$fileno=\$arg | |
52 | A="$A \"\$A$fileno\"" | |
53 | ;; | |
54 | esac | |
55 | done | |
56 | ||
57 | if test $fileno -eq 0; then | |
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58 | echo "recompress .Z files into $ext (gzip) files" |
59 | echo usage: `echo $0 | sed 's,^.*/,,'` "[-tv9KP]" file.Z... | |
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60 | echo " -t tests the new files before deleting originals" |
61 | echo " -v be verbose" | |
62 | echo " -9 use the slowest compression method (optimal compression)" | |
caed0dfe | 63 | echo " -K keep a .Z file when it is smaller than the $ext file" |
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64 | echo " -P use pipes for the conversion $warn" |
65 | exit 1 | |
66 | fi | |
67 | ||
68 | eval set "$A" # the files are now in $1, $2, ... | |
69 | ||
70 | opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'` | |
71 | case "$opt" in | |
72 | *t*) check=1; opt=`echo "$opt" | sed 's/t//g'` | |
73 | esac | |
74 | case "$opt" in | |
75 | *K*) keep=1; opt=`echo "$opt" | sed 's/K//g'` | |
76 | esac | |
77 | case "$opt" in | |
78 | *P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'` | |
79 | esac | |
80 | if test -n "$opt"; then | |
81 | opt="-$opt" | |
82 | fi | |
83 | ||
84 | for i do | |
85 | n=`echo $i | sed 's/.Z$//'` | |
86 | if test ! -f "$n.Z" ; then | |
87 | echo $n.Z not found | |
88 | res=1; continue | |
89 | fi | |
90 | test $keep -eq 1 && old=`wc -c < "$n.Z"` | |
91 | if test $pipe -eq 1; then | |
caed0dfe | 92 | if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then |
3013fe88 | 93 | # Copy file attributes from old file to new one, if possible. |
caed0dfe | 94 | test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null |
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95 | else |
96 | echo error while recompressing $n.Z | |
97 | res=1; continue | |
98 | fi | |
99 | else | |
100 | if test $check -eq 1; then | |
101 | if cp -p "$n.Z" "$n.$$" 2> /dev/null || cp "$n.Z" "$n.$$"; then | |
102 | : | |
103 | else | |
104 | echo cannot backup "$n.Z" | |
105 | res=1; continue | |
106 | fi | |
107 | fi | |
108 | if gzip -d "$n.Z"; then | |
109 | : | |
110 | else | |
111 | test $check -eq 1 && mv "$n.$$" "$n.Z" | |
112 | echo error while uncompressing $n.Z | |
113 | res=1; continue | |
114 | fi | |
115 | if gzip $opt "$n"; then | |
116 | : | |
117 | else | |
118 | if test $check -eq 1; then | |
119 | mv "$n.$$" "$n.Z" && rm -f "$n" | |
120 | echo error while recompressing $n | |
121 | else | |
122 | # compress $n (might be dangerous if disk full) | |
123 | echo error while recompressing $n, left uncompressed | |
124 | fi | |
125 | res=1; continue | |
126 | fi | |
127 | fi | |
caed0dfe | 128 | test $keep -eq 1 && new=`wc -c < "$n$ext"` |
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129 | if test $keep -eq 1 -a `expr \( $old + $block - 1 \) / $block` -lt \ |
130 | `expr \( $new + $block - 1 \) / $block`; then | |
131 | if test $pipe -eq 1; then | |
caed0dfe | 132 | rm -f "$n$ext" |
3013fe88 | 133 | elif test $check -eq 1; then |
caed0dfe | 134 | mv "$n.$$" "$n.Z" && rm -f "$n$ext" |
3013fe88 | 135 | else |
caed0dfe | 136 | gzip -d "$n$ext" && compress "$n" && rm -f "$n$ext" |
3013fe88 | 137 | fi |
caed0dfe | 138 | echo "$n.Z smaller than $n$ext -- unchanged" |
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139 | |
140 | elif test $check -eq 1; then | |
caed0dfe | 141 | if gzip -t "$n$ext" ; then |
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142 | rm -f "$n.$$" "$n.Z" |
143 | else | |
144 | test $pipe -eq 0 && mv "$n.$$" "$n.Z" | |
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145 | rm -f "$n$ext" |
146 | echo error while testing $n$ext, $n.Z unchanged | |
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147 | res=1; continue |
148 | fi | |
149 | elif test $pipe -eq 1; then | |
150 | rm -f "$n.Z" | |
151 | fi | |
152 | done | |
153 | exit $res |