| Jari Aalto | 28ef6c3 | 2001-04-06 19:14:31 +0000 | [diff] [blame] | 1 | # builtins with exit status inverted |
| 2 | |
| 3 | ( true ) |
| 4 | echo $? |
| 5 | ( ! true ) |
| 6 | echo $? |
| 7 | |
| 8 | ( false ) |
| 9 | echo $? |
| 10 | ( ! false ) |
| 11 | echo $? |
| 12 | |
| 13 | # inverting shouldn't affect exit |
| 14 | (exit 42) |
| 15 | echo $? |
| 16 | |
| 17 | ( ! exit 42 ) |
| 18 | echo $? |
| 19 | |
| 20 | # commands requiring an exec with exit status inverted -- broken in bash-2.04 |
| 21 | |
| 22 | ( ls > /dev/null 2>&1 ) |
| 23 | echo $? |
| 24 | ( ! ls > /dev/null 2>&1 ) |
| 25 | echo $? |
| 26 | |
| 27 | touch /tmp/notwrite |
| 28 | chmod 400 /tmp/notwrite |
| 29 | |
| 30 | # make sure redirection failures in commands whose exit status is inverted |
| 31 | # are handled correctly |
| 32 | |
| 33 | ( ls > /tmp/notwrite ) 2>/dev/null |
| 34 | echo $? |
| 35 | |
| 36 | ( ! ls > /tmp/notwrite ) 2>/dev/null |
| 37 | echo $? |
| 38 | |
| 39 | # now add exit traps, true and false for commands with and without exit |
| 40 | # status inversion |
| 41 | |
| 42 | (trap 'false' 0 ; ! ls > /tmp/notwrite ) 2>/dev/null |
| 43 | echo $? |
| 44 | |
| 45 | (trap 'false' 0 ; ls > /tmp/notwrite ) 2>/dev/null |
| 46 | echo $? |
| 47 | |
| 48 | (trap 'true' 0 ; ! ls > /tmp/notwrite ) 2>/dev/null |
| 49 | echo $? |
| 50 | |
| 51 | (trap 'true' 0 ; ls > /tmp/notwrite ) 2>/dev/null |
| 52 | echo $? |
| 53 | |
| 54 | rm -f /tmp/notwrite |