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ash: fix a bug where redirection fds were not closed afterwards.

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optimize close+fcntl(DUPFD) into dup2. add testsuites.

function                                             old     new   delta
copyfd                                                47      68     +21
argstr                                              1311    1298     -13
popredir                                             148     131     -17
redirect                                            1139    1107     -32
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 21/-62)            Total: -41 bytes
This commit is contained in:
Denis Vlasenko
2008-07-24 19:46:38 +00:00
parent 6fbb43bc3c
commit 5a867317bb
6 changed files with 53 additions and 39 deletions
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5
shell/ash_test/ash-redir/redir3.tests Executable file
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@@ -0,0 +1,5 @@
# redirects to closed descriptors should not leave these descriptors"
# open afterwards
echo TEST 9>/dev/null
echo MUST ERROR OUT >&9
echo "Output to fd#9: $?"