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hush: make comment more clear

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2020-12-27 16:04:54 +01:00
parent 1462673dde
commit c7ef818768
1 changed files with 5 additions and 4 deletions
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9
shell/hush.c
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@ -6694,12 +6694,13 @@ static NOINLINE int expand_one_var(o_string *output, int n,
*
* Word-splitting and single quote behavior:
*
* $ f() { for i; do echo "|$i|"; done; };
* $ f() { for i; do echo "|$i|"; done; }
*
* $ x=; f ${x:?'x y' z}
* bash: x: x y z #BUG: does not abort, ${} results in empty expansion
* $ x=; f ${x:?'x y' z}; echo $?
* bash: x: x y z # neither f nor "echo $?" executes
* (if interactive, bash does not exit, but merely aborts to prompt. $? is set to 1)
* $ x=; f "${x:?'x y' z}"
* bash: x: x y z # dash prints: dash: x: 'x y' z #BUG: does not abort, ${} results in ""
* bash: x: x y z # dash prints: dash: x: 'x y' z
*
* $ x=; f ${x:='x y' z}
* |x|