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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2011-03-15 17:41:53 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2011-03-15 17:41:53 +0800 |
| commit | ec2c84d3c4dba4b74440d72bdd1de416a9acd2a9 (patch) | |
| tree | ba0dc60e76629ab37a243b7b57efcb0ed297a6e3 | |
| parent | [DEBUG] Use va_copy when reusing a va_list (diff) | |
| download | dash-ec2c84d3c4dba4b74440d72bdd1de416a9acd2a9.tar.gz dash-ec2c84d3c4dba4b74440d72bdd1de416a9acd2a9.zip | |
[PARSER] Fix clobbering of checkkwd
On Sun, Nov 07, 2010 at 02:21:21AM +0000, Jonathan Nieder wrote:
>
> Just ran into some strange behavior:
>
> $ cat test.sh
> #!/bin/sh
> echo hello >greeting
> cat <<EOF &&
> $(cat greeting)
> EOF
> {
> echo $?
> cat greeting
> } >/dev/null
>
>
> $ sh test.sh
> hello
> test.sh: 7: {: not found
> 127
> hello
> test.sh: 10: Syntax error: "}" unexpected
>
> bash, mksh, pdksh, and ksh93 all print hello as expected. The problem
> is reproducible with all versions of dash in the git repo.
This is caused by the clobbering of checkkwd due to readtoken
recursion while parsing a here document.
This patch fixes it by saving the original value of checkkwd.
Reported-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | src/parser.c | 5 |
2 files changed, 7 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index 5b6d53e..50a8044 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +2011-03-15 Herbert Xu <herbert@gondor.apana.org.au> + + * Fix clobbering of checkkwd. + 2011-03-15 Jonathan Nieder <jrnieder@gmail.com> * Free IFS state after here document expansion. diff --git a/src/parser.c b/src/parser.c index 0bfd620..528d005 100644 --- a/src/parser.c +++ b/src/parser.c @@ -687,6 +687,7 @@ STATIC int readtoken(void) { int t; + int kwd = checkkwd; #ifdef DEBUG int alreadyseen = tokpushback; #endif @@ -697,7 +698,7 @@ top: /* * eat newlines */ - if (checkkwd & CHKNL) { + if (kwd & CHKNL) { while (t == TNL) { parseheredoc(); t = xxreadtoken(); @@ -711,7 +712,7 @@ top: /* * check for keywords */ - if (checkkwd & CHKKWD) { + if (kwd & CHKKWD) { const char *const *pp; if ((pp = findkwd(wordtext))) { |