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From: Andreas Schwab <schwab@suse.de>
Newsgroups: gnu.bash.bug
Subject: exec doesn't restore terminal signals
Date: Tue, 28 Jul 2015 11:48:54 +0200
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Xref: aioe.org gnu.bash.bug:11268

Running exec in an interactive shell does not restore the terminal
signals TSTP, TTIN, TTOU, causing them to be ignored in the new command.

$ trap
$ exec bash
$ trap
trap -- '' SIGTSTP
trap -- '' SIGTTIN
trap -- '' SIGTTOU

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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"And now for something completely different."