Package: bash
Version: 3.2-4
Severity: normal
Negative return values from functions/programs are badly handled.
I dunno if SH shells should accept negative return values, but BaSH
fails on handeling it.
E.g. if a function returns -1, the $? shell variable is set to 255. It
looks like a unsigned variable overflow.
A simple way to see it:
First define a function for esayly make tests:
$ AA() { return $1; }
Then try with negative values:
$ AA -1; echo $?
255
$ AA -25; echo $?
231
$ AA -255; echo $?
1
I've tryed out with DaSH and it gave me an error message and resets the
value to an internal error code, that seems better to me:
With DaSH:
$ AA() { return $1; }
$ AA -1; echo $?
return: 5: Illegal number: -1
$ echo $?
2
$ AA -255; echo $?
return: 7: Illegal number: -255
$ echo $?
2
Cheers,
Colomban W.
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (900, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.25-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages bash depends on:
ii base-files 4.0.4 Debian base system miscellaneous f
ii debianutils 2.30 Miscellaneous utilities specific t
ii libc6 2.7-10 GNU C Library: Shared libraries
ii libncurses5 5.6+20080713-1 shared libraries for terminal hand
Versions of packages bash recommends:
ii bash-completion 20080705 programmable completion for the ba
Versions of packages bash suggests:
pn bash-doc <none> (no description available)
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