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Fix ${!foo@} and ${!foo*} to include 'foo' itself in search

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These expansions are supposed to yield all variable names beginning
with the indicated prefix. This should include the variable name
that is identical to the prefix (as 'prefix' begins with 'prefix').

This bugfix is backported from the abandoned ksh 93v- beta, so AT&T
intended this change. It also makes ksh work like bash in this.

src/cmd/ksh93/sh/macro.c: varsub(): M_NAMESCAN:
- Check if the prefix itself exists. If so, start with that.

src/cmd/ksh93/tests/variables.sh:
- Add tests for these expansions.

src/cmd/ksh93/sh.1:
- Fix the incomplete documentation of these expansions.

src/cmd/ksh93/COMPATIBILITY:
- Note the change as it's potentially incompatible in corner cases.

Resolves: https://github.com/ksh93/ksh/issues/183
This commit is contained in:
Martijn Dekker 2021-03-09 04:35:45 +00:00
parent e58637752a
commit 4a8072e826
6 changed files with 32 additions and 3 deletions
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2
src/cmd/ksh93/include/version.h
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@ -20,7 +20,7 @@
#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 "2021-03-07" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_DATE "2021-03-09" /* 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. */