Public bug reported:
Binary package hint: dash
With set -e, dash executes only the first command of an INT (Ctrl-C)
trap handler:
#!/bin/sh
set -e
trap 'sorry' INT
trap 'echo EXIT' EXIT
zero() {
return 0;
}
sorry() {
#zero
echo "Ignored 1"; echo "Ignored 2"
sleep 1
echo Back
}
for i in 3 2 1; do
echo "$i"
sleep 1 # || true
done
echo OUT
Actual result:
$ ./x # Press ^C right away
3
^CIgnored 1
EXIT
Expected result:
3
^CIgnored 1
Ignored 2
Back
2
1
OUT
EXIT
By un-commenting the call to function zero, or the "|| true" in the main
loop, the problem disapears.
Bash also exits prematurely, but at least it runs the "trap INT" handler
code to completion.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: dash 0.5.5.1-3ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-25.45-generic 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Tue Nov 9 19:12:41 2010
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: dash
** Affects: dash (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 lucid
--
dash "set -e" breaks "trap action INT"
https://bugs.launchpad.net/bugs/673119
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