This test script:
---8<---
#!/bin/sh
set -e
set -u
#set -x
trap 'wrapper_func' EXIT TERM INT
other_func() {
echo "in : other_func" >&2
# XXX: if this doesn't fail, the expected exit status comes out after 'trap'
# but, if it _does_ fail, the exit status of the failed command will
# be returned, as errexit will step in.
ls -al /foo/bar/baz || :
echo "out: other_func" >&2
}
wrapper_func() {
echo "in : wrapper_func" >&2
date +%s >/dev/null
echo "1. : wrapper_func: listing traps" >&2
trap
echo "2. : wrapper_func: removing traps" >&2
trap - EXIT INT TERM
echo "3. : wrapper_func: listing traps again" >&2
trap
other_func
echo "out: wrapper_func" >&2
}
echo "running: $0" >&2
sleep 5
exit 77
--->8---
does not behave as expected if the shell is ash, hush or dash. Bash on
debian unstable:
GNU bash, version 4.1.5(1)-release (i486-pc-linux-gnu)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
does TRT, though.
All shells run the trap action twice when hitting C-c with trap on INT.
With signals removed in the trap action, only bash behaves, according to
my experiments.
Cheers,
--
Cristian
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