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| author | Denys Vlasenko | 2020-02-14 16:16:34 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2020-02-16 19:14:45 +0100 |
| commit | f7eea8c235dea6699a21c7b26c218e6c0dc1bf95 (patch) | |
| tree | 0888318b2f41a89a2a36238937bfc198b7d267d1 | |
| parent | acf79f9913e4cf9b2889404af6758ec8a0d6b090 (diff) | |
| download | busybox-f7eea8c235dea6699a21c7b26c218e6c0dc1bf95.zip busybox-f7eea8c235dea6699a21c7b26c218e6c0dc1bf95.tar.gz | |
ash: parser: Fix incorrect eating of backslash newlines
Keeping up with upstream (in our case, 'before patch' code is not buggy).
Upstream commit:
Date: Fri, 11 May 2018 23:41:25 +0800
parser: Fix incorrect eating of backslash newlines
With the introduction of synstack->syntax, a number of references
to the syntax variable was missed during the conversion. This
causes backslash newlines to be incorrectly removed in single
quote context.
This patch also combines these calls into a new helper function
pgetc_top.
Fixes: ab1cecb40478 ("parser: Add syntax stack for recursive...")
Reported-by: Leah Neukirchen <leah@vuxu.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | shell/ash.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/shell/ash.c b/shell/ash.c index c177ac0..a300061 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -10829,6 +10829,12 @@ struct synstack { struct synstack *next; }; +static int +pgetc_top(struct synstack *stack) +{ + return stack->syntax == SQSYNTAX ? pgetc() : pgetc_eatbnl(); +} + static void synstack_push(struct synstack **stack, struct synstack *next, int syntax) { @@ -12194,7 +12200,7 @@ readtoken1(int c, int syntax, char *eofmark, int striptabs) } USTPUTC(c, out); nlprompt(); - c = synstack->syntax == SQSYNTAX ? pgetc() : pgetc_eatbnl(); + c = pgetc_top(synstack); goto loop; /* continue outer loop */ case CWORD: USTPUTC(c, out); @@ -12345,7 +12351,7 @@ readtoken1(int c, int syntax, char *eofmark, int striptabs) IF_ASH_ALIAS(if (c != PEOA)) USTPUTC(c, out); } - c = synstack->syntax == SQSYNTAX ? pgetc() : pgetc_eatbnl(); + c = pgetc_top(synstack); } /* for (;;) */ endword: |