1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
#!/bin/sh
# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
# Copyright (C) 1998, 2002, 2006-2007, 2009-2023 Free Software Foundation, Inc.
# Copyright (C) 1993 Jean-loup Gailly
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
case $1 in
--__cmp) shift
prog=cmp; cmp='${CMP-cmp}' ;;
*) prog=diff; cmp='${DIFF-diff}';;
esac
version="z$prog (gzip) @VERSION@
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Jean-loup Gailly."
usage="Usage: $0 [OPTION]... FILE1 [FILE2]
Compare FILE1 to FILE2, using their uncompressed contents if they are
compressed. If FILE2 is omitted, compare FILE1 to the uncompressed
contents of FILE1.gz. Do comparisons like '$prog' does.
OPTIONs are the same as for '$prog'.
Report bugs to <bug-gzip@gnu.org>."
# sed script to escape all ' for the shell, and then (to handle trailing
# newlines correctly) turn trailing X on last line into '.
escape='
s/'\''/'\''\\'\'''\''/g
$s/X$/'\''/
'
filesonly=
file1=
file2=
needop=
for arg
do
case $filesonly$needop$arg in
--h*) printf '%s\n' "$usage" || exit 2; exit;;
--v*) printf '%s\n' "$version" || exit 2; exit;;
--) filesonly=t;;
-*\'*) cmp="$cmp '"`printf '%sX\n' "$arg" | LC_ALL=C sed "$escape"`;;
-[CDFISUWXx]) needop="'$arg'";;
-?*) cmp="$cmp '$arg'";;
*) case $needop in
'') case $arg in
'') printf >&2 '%s\n' "$0: empty file name"; exit 2;;
esac
case $file1 in
'') file1=$arg;;
*) case $file2 in
'') file2=$arg;;
*) printf >&2 '%s\n' "$0: extra operand '$arg'"; exit 2;;
esac;;
esac;;
*) cmp="$cmp $needop '$arg'"
needop=;;
esac;;
esac
done
case $needop in
'') ;;
*) printf >&2 '%s\n' "$0: $prevarg: option requires an argument -- $needop"
exit 2;;
esac
cmp="$cmp --"
case $file1 in
'') printf >&2 '%s\n' "$0: missing operand"; exit 2;;
-) ;;
*) <"$file1" || exit 2;;
esac
case $file2 in
''|-) ;;
*) <"$file2" || exit 2;;
esac
gzip_status=0
exec 3>&1
case $file2 in
'')
case $file1 in
*[-.]gz* | *[-.][zZ] | *.t[ga]z)
FILE=`LC_ALL=C expr "X$file1" : 'X\(.*\)[-.][zZtga]*$'`
gzip_status=$(
exec 4>&1
('gzip' -cd -- "$file1" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - '"$FILE"' >&3
);;
*)
printf >&2 '%s\n' "$0: $file1: unknown compressed file extension"
exit 2;;
esac;;
*)
case $file1,$file2 in
-,-)
gzip_status=$(
exec 4>&1
('gzip' -cdfq - 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - - >&3
);;
*)
case $file1 in
*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
case $file2 in
*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
if
# Reject Solaris 8's buggy /bin/bash 2.03.
echo X |
(echo X | eval "$cmp" /dev/fd/5 - >/dev/null 2>&1) \
5<&0
then
gzip_status=$(
exec 4>&1
('gzip' -cdfq -- "$file1" 4>&-; echo $? >&4) 3>&- |
(('gzip' -cdfq -- "$file2" 4>&-
echo $? >&4) 3>&- 5<&- </dev/null |
eval "$cmp" /dev/fd/5 - >&3) 5<&0
)
cmp_status=$?
case $gzip_status in
*[1-9]*) gzip_status=1;;
*) gzip_status=0;;
esac
(exit $cmp_status)
else
tmp=
trap '
test -n "$tmp" && rm -f "$tmp"
(exit 2); exit 2
' HUP INT PIPE TERM 0
case $TMPDIR in
/ | /*/) ;;
/*) TMPDIR=$TMPDIR/;;
*) TMPDIR=/tmp/;;
esac
if type mktemp >/dev/null 2>&1; then
tmp=`mktemp "${TMPDIR}zdiffXXXXXXXXX"` ||
exit 2
else
set -C
tmp=${TMPDIR}zdiff$$
fi
'gzip' -cdfq -- "$file2" > "$tmp" || exit 2
gzip_status=$(
exec 4>&1
('gzip' -cdfq -- "$file1" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - '"$tmp"' >&3
)
cmp_status=$?
rm -f "$tmp" || gzip_status=$?
trap - HUP INT PIPE TERM 0
(exit $cmp_status)
fi;;
*)
gzip_status=$(
exec 4>&1
('gzip' -cdfq -- "$file1" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" - '"$file2"' >&3
);;
esac;;
*) case $file2 in
*[-.]gz* | *[-.][zZ] | *.t[ga]z | -)
gzip_status=$(
exec 4>&1
('gzip' -cdfq -- "$file2" 4>&-; echo $? >&4) 3>&- |
eval "$cmp" '"$file1"' - >&3
);;
*) eval "$cmp" '"$file1"' '"$file2"';;
esac;;
esac;;
esac;;
esac
cmp_status=$?
test "$gzip_status" -eq 0 || exit 2
exit $cmp_status
|
