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Fix remaining bug in ${var:-'{}'} (re: d087b031)

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The following problems remained:

$ var=x; echo ${var:-'{}'}
x}
$ var=; echo ${var:+'{}'}
}

src/cmd/ksh93/sh/macro.c: varsub():
- Use the new ST_MOD1 state table to skip over ${var-'foo'}, etc.
  instead of ST_QUOTE. In ST_MOD1 the ' is categorised as S_LIT
  which causes the single quotes to be skipped over correctly.
  See d087b031 for more info.

src/cmd/ksh93/tests/quoting2.sh:
- Add tests for this remaining bug.
- Make the new test xtrace-proof.

Resolves: https://github.com/ksh93/ksh/issues/290 (again)
This commit is contained in:
Martijn Dekker 2021-05-03 02:59:09 +01:00
parent 1aec9b06dd
commit f31e368795
4 changed files with 25 additions and 4 deletions
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2
src/cmd/ksh93/sh/macro.c
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@ -1659,7 +1659,7 @@ retry1:
}
else
{
sh_lexskip(lp, RBRACE, 0, sh_lexstates[ST_BRACE][c]==S_MOD1 ? ST_QUOTE : ST_NESTED);
sh_lexskip(lp, RBRACE, 0, sh_lexstates[ST_BRACE][c]==S_MOD1 ? ST_MOD1 : ST_NESTED);
stkseek(stkp,offset);
}
argp=stkptr(stkp,offset);