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Fix ${!} and ${$} throwing syntax error in here-document

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The inclusion of the special parameter expansions ${!} and ${$}
(including the braces) in a here-document caused a syntax error.
Bug reported by @Saikiran-m on Github.

src/cmd/ksh93/data/lexstates.c: sh_lexstate7[]:
- Change the state for ! (33) and $ (36) from S_ERR to 0. State
  table 7 is for skipping over ${...}, so this avoids the S_ERR
  state being invoked in sh_lex() (lex.c) for these characters
  while skipping ${...} in a here-doc.

src/cmd/ksh93/tests/heredoc.sh:
- Test evaluating the braces expansion form for all special
  parameters (@ * # ! $ - ? 0) in a here-document.

Fixes: https://github.com/ksh93/ksh/issues/127
This commit is contained in:
Martijn Dekker 2020-09-04 04:54:35 +02:00
parent f9c127e39e
commit 6575903d1d
2 changed files with 11 additions and 1 deletions
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2
src/cmd/ksh93/data/lexstates.c
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@ -274,7 +274,7 @@ static const char sh_lexstate7[256] =
S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR,
S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR, S_ERR,
S_ERR, S_ERR, S_ERR, S_MOD2, S_ERR, S_MOD2, S_ERR, S_ERR,
S_ERR, 0, S_ERR, S_MOD2, 0, S_MOD2, S_ERR, S_ERR,
S_ERR, S_ERR, S_MOD1, S_MOD1, S_ERR, S_MOD1, S_DOT, S_MOD2,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, S_MOD1, S_ERR, S_ERR, S_MOD1, S_ERR, S_MOD1,