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Replace safe FD fix with Solaris/ksh2020 version (re: 045fe6a1)

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This pulls a new version of sh_iosafefd() from:
https://github.com/oracle/solaris-userland/blob/master/components/ksh93/patches/285-30771135.patch

It was written by Kurtis Rader for ksh2020:
https://github.com/att/ast/issues/198
https://github.com/att/ast/pull/199
It is presumably better than the Red Hat version and also comes
with more regression test cases (although it still doesn't fix
modernish BUG_CSUBSTDO, which remains in the TODO file).

This commit does not go along with other peripheral changes from
that patch, i.e. a different name and location of this function.

src/cmd/ksh93/sh/io.c:
- Replace sh_iosafefd() as above.

src/cmd/ksh93/tests/subshell.sh:
- Add and tweak tests from the patch.
This commit is contained in:
Martijn Dekker 2021-01-08 16:35:26 +00:00
parent 17ebfbf6a3
commit ab98ec65e4
2 changed files with 39 additions and 7 deletions
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26
src/cmd/ksh93/tests/subshell.sh
View file

@ -854,6 +854,32 @@ actual=${ get_value; }
actual=`get_value`
[[ $actual == "$expect" ]] || err_exit "\`Comsub\` failed to return output (expected '$expect', got '$actual')"
# more tests from https://github.com/oracle/solaris-userland/blob/master/components/ksh93/patches/285-30771135.patch
tmpfile=$tmp/1116072.dummy
touch "$tmpfile"
exp='return value'
function get_value
{
case=$1
(( case >= 1 )) && exec 3< $tmpfile
(( case >= 2 )) && exec 4< $tmpfile
(( case >= 3 )) && exec 6< $tmpfile
# To trigger the bug we have to spawn an external command.
$(whence -p true)
(( case >= 1 )) && exec 3<&-
(( case >= 2 )) && exec 4<&-
(( case >= 3 )) && exec 6<&-
print "$exp"
}
got=$(get_value 0)
[[ $got == "$exp" ]] || err_exit "failed to capture subshell output when closing fd: case 0"
got=$(get_value 1)
[[ $got == "$exp" ]] || err_exit "failed to capture subshell output when closing fd: case 1"
got=$(get_value 2)
[[ $got == "$exp" ]] || err_exit "failed to capture subshell output when closing fd: case 2"
got=$(get_value 3)
[[ $got == "$exp" ]] || err_exit "failed to capture subshell output when closing fd: case 3"
# ======
# https://bugzilla.redhat.com/1117404