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hush: fix corner cases with exec in empty expansions

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Cases like these:

var=val exec >redir

var=val `` >redir

function                                             old     new   delta
run_pipe                                            1701    1723     +22
redirect_and_varexp_helper                            56      55      -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 22/-1)              Total: 21 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-04-05 14:41:21 +02:00
parent 929a41d577
commit 41d8f10813
5 changed files with 35 additions and 17 deletions
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2
shell/ash_test/ash-redir/redir_exec1.right Normal file
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redir_exec1.tests: line 1: can't create /cant/be/created: nonexistent directory
First

2
shell/ash_test/ash-redir/redir_exec1.tests Executable file
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v=`echo First >&2` exec >/cant/be/created
echo One:$?