| 1 |
Catchall for general errors |
let “var1 = 1/0” |
Miscellaneous errors, such as “divide by zero” and other impermissible operations |
| 2 |
Misuse of shell builtins (according to Bash documentation) |
empty_function() {} |
Missing keyword or command, or permission problem (and diff return code on a failed binary file comparison). |
| 126 |
Command invoked cannot execute |
/dev/null |
Permission problem or command is not an executable |
| 127 |
“command not found” |
illegal_command |
Possible problem with $PATH or a typo |
| 128 |
Invalid argument to exit |
exit 3.14159 |
exit takes only integer args in the range 0 - 255 (see first footnote) |
| 128+n |
Fatal error signal “n” |
kill -9 $PPID of script |
$? returns 137 (128 + 9) |
| 130 |
Script terminated by Control-C |
Ctl-C |
Control-C is fatal error signal 2, (130 = 128 + 2, see above) |
| 255* |
Exit status out of range |
exit -1 |
exit takes only integer args in the range 0 - 255 |