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Fix single quotes in expansion operator string (re: 5ed9ffd6)

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The referenced commit introduced the following bug:

> The closing quote does not appear to be registering during the
> parse of the following:
>
>	echo ${var:+'{}'}
>
> Within a script, this will result in:
>
>	syntax error at line 1: `'' unmatched

src/cmd/ksh93/data/lexstates.c,
src/cmd/ksh93/include/lexstates.h:
- Add new ST_MOD1 state table that is a copy of ST_QUOTE, but adds
  a special meaning (ST_LIT) for the single quote (position 39).

src/cmd/ksh93/sh/lex.c: sh_lex():
- For parameter expansion operators with old-style quoting
  (S_MOD1), use the new ST_MOD1 state table instead of ST_QUOTE.
  This causes single quotes within them to be processed properly.

src/cmd/ksh93/tests/quoting2.sh:
- Add tests.

Thanks to @gkamat for the bug report.
Resolves: https://github.com/ksh93/ksh/issues/290
This commit is contained in:
Martijn Dekker 2021-04-30 05:10:04 +01:00
parent 090b65e79b
commit d087b031f0
6 changed files with 47 additions and 4 deletions
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2
src/cmd/ksh93/include/version.h
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@ -21,7 +21,7 @@
#define SH_RELEASE_FORK "93u+m" /* only change if you develop a new ksh93 fork */
#define SH_RELEASE_SVER "1.0.0-alpha" /* semantic version number: https://semver.org */
#define SH_RELEASE_DATE "2021-04-26" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_DATE "2021-04-30" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_CPYR "(c) 2020-2021 Contributors to ksh " SH_RELEASE_FORK
/* Scripts sometimes field-split ${.sh.version}, so don't change amount of whitespace. */