tree fe196361b9b00c679d6c652a18d29f47eaf0f65c
parent 17a5f24e0a8ec22f74399764db30d97ae310f3c6
author Herbert Xu <herbert@gondor.apana.org.au> 1465213963 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> 1472825456 +0800

trap: Implement POSIX.1-2008 trap reset behaviour

Jonathan Perkin submitted a patch to fix the behaviour of trap
when the first argument is an integer.  Currently it is treated
as a command while POSIX requires it to be treated as a signal.

This patch is based on his idea but instead of adding an extra
argument to decode_signal I have added a new decode_signum helper.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>