diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2020-02-17 10:24:32 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-02-17 10:24:32 +0100 |
| commit | 9ee5892798be81f7a6f3e070ecd52cbf0d55740e (patch) | |
| tree | 9801edcaadd307687df6f33cad7ba7edd1e2b75b /shell/ash.c | |
| parent | c2ce888030b6b880b3229520a8ff7d7026248a9a (diff) | |
| download | busybox-9ee5892798be81f7a6f3e070ecd52cbf0d55740e.tar.gz | |
ash: expand: Fix trailing newlines processing in backquote expanding
Upstream commit:
Date: Mon, 29 Apr 2019 19:13:37 +0500
expand: Fix trailing newlines processing in backquote expanding
According to POSIX.1-2008 we should remove newlines only at the end of
the substitution. Newlines-only substitions causes dash to remove
newlines before beggining of the substitution. The following code:
cat <<END
1
$(echo "")
2
END
prints "1<newline>2" instead of expected "1<newline><newline>2".
This patch fixes trailing newlines processing in backquote expanding.
Signed-off-by: Nikolai Merinov <n.merinov@inango-systems.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/ash.c')
| -rw-r--r-- | shell/ash.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/shell/ash.c b/shell/ash.c index 90496ba7e..dfe6d1c48 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -6578,7 +6578,7 @@ expbackq(union node *cmd, int flag) /* Eat all trailing newlines */ dest = expdest; - for (; dest > (char *)stackblock() && dest[-1] == '\n';) + for (; dest > ((char *)stackblock() + startloc) && dest[-1] == '\n';) STUNPUTC(dest); expdest = dest; |