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8868edaf CR |
1 | # This program is free software: you can redistribute it and/or modify |
2 | # it under the terms of the GNU General Public License as published by | |
3 | # the Free Software Foundation, either version 3 of the License, or | |
4 | # (at your option) any later version. | |
5 | # | |
6 | # This program is distributed in the hope that it will be useful, | |
7 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | # GNU General Public License for more details. | |
10 | # | |
11 | # You should have received a copy of the GNU General Public License | |
12 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
13 | # | |
28ef6c31 JA |
14 | # builtins with exit status inverted |
15 | ||
16 | ( true ) | |
17 | echo $? | |
18 | ( ! true ) | |
19 | echo $? | |
20 | ||
21 | ( false ) | |
22 | echo $? | |
23 | ( ! false ) | |
24 | echo $? | |
25 | ||
26 | # inverting shouldn't affect exit | |
27 | (exit 42) | |
28 | echo $? | |
29 | ||
30 | ( ! exit 42 ) | |
31 | echo $? | |
32 | ||
33 | # commands requiring an exec with exit status inverted -- broken in bash-2.04 | |
34 | ||
35 | ( ls > /dev/null 2>&1 ) | |
36 | echo $? | |
37 | ( ! ls > /dev/null 2>&1 ) | |
38 | echo $? | |
39 | ||
40 | touch /tmp/notwrite | |
41 | chmod 400 /tmp/notwrite | |
42 | ||
43 | # make sure redirection failures in commands whose exit status is inverted | |
44 | # are handled correctly | |
45 | ||
46 | ( ls > /tmp/notwrite ) 2>/dev/null | |
47 | echo $? | |
48 | ||
49 | ( ! ls > /tmp/notwrite ) 2>/dev/null | |
50 | echo $? | |
51 | ||
52 | # now add exit traps, true and false for commands with and without exit | |
53 | # status inversion | |
54 | ||
55 | (trap 'false' 0 ; ! ls > /tmp/notwrite ) 2>/dev/null | |
56 | echo $? | |
57 | ||
58 | (trap 'false' 0 ; ls > /tmp/notwrite ) 2>/dev/null | |
59 | echo $? | |
60 | ||
61 | (trap 'true' 0 ; ! ls > /tmp/notwrite ) 2>/dev/null | |
62 | echo $? | |
63 | ||
64 | (trap 'true' 0 ; ls > /tmp/notwrite ) 2>/dev/null | |
65 | echo $? | |
66 | ||
67 | rm -f /tmp/notwrite |