From 7710a926b321879b84bf349b865b1dd4c52083f8 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Mon, 27 May 2019 13:39:37 +0800 Subject: parser: Only accept single-digit parameter expansion outside of braces On Thu, Apr 25, 2019 at 01:39:52AM +0000, Michael Orlitzky wrote: > The POSIX spec says, > > The parameter name or symbol can be enclosed in braces, which are > optional except for positional parameters with more than one digit or > when parameter is a name and is followed by a character that could be > interpreted as part of the name. > > However, dash seems to diverge from that behavior when we get to $10: > > $ cat test.sh > echo $10 > > $ dash ./test.sh one two three four five six seven eight nine ten > ten > > $ bash ./test.sh one two three four five six seven eight nine ten > one0 This patch should fix the problem. Signed-off-by: Herbert Xu --- src/parser.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/parser.c b/src/parser.c index 4bda42e..b318b08 100644 --- a/src/parser.c +++ b/src/parser.c @@ -1268,7 +1268,7 @@ varname: do { STPUTC(c, out); c = pgetc_eatbnl(); - } while (is_digit(c)); + } while (!subtype && is_digit(c)); } else if (c != '}') { int cc = c; -- cgit 1.4.1