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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2019-01-18 13:01:18 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-02-25 12:52:12 +0800 |
| commit | 48875c1201930d1e71d358eb1cf3eacc166795be (patch) | |
| tree | 999c367b70ef908863c937944a206fb8b3cdcf7b /src/mkbuiltins | |
| parent | output: Fix clang warnings about GNU old-style field designator (diff) | |
| download | dash-48875c1201930d1e71d358eb1cf3eacc166795be.tar.gz dash-48875c1201930d1e71d358eb1cf3eacc166795be.zip | |
redir: Handle nested exec within REALLY_CLOSED redirection
The value of REALLY_CLOSED is used to avoid an unnecessary close(2)
call when restoring redirections. However, as it stands it can
remove a close(2) call that's actually needed. This happens when
an enclosed exec(1) command leaves an open file descriptor behind.
This patch fixes this by replacing REALLY_CLOSED with closed_redirs
to track the current status of redirected file descriptors and
leaving redirlist to only handle the previous state of redirected
file descriptors.
Reported-by: Martijn Dekker <martijn@inlv.org>
Fixes: ce0f1900d869 ("[REDIR] Fix redirect restore on saved file...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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