Author: jilles
Date: Sat Dec 18 23:03:51 2010
New Revision: 216547
URL: http://svn.freebsd.org/changeset/base/216547
Log:
sh: arith: Disallow decimal constants starting with 0 (containing 8 or 9).
Constants in arithmetic starting with 0 should be octal only.
This avoids the following highly puzzling result:
$ echo $((018-017))
3
by making it an error instead.
Added:
head/tools/regression/bin/sh/expansion/arith8.0 (contents, props changed)
Modified:
head/bin/sh/arith_lex.l
Modified: head/bin/sh/arith_lex.l
==============================================================================
--- head/bin/sh/arith_lex.l Sat Dec 18 23:03:38 2010 (r216546)
+++ head/bin/sh/arith_lex.l Sat Dec 18 23:03:51 2010 (r216547)
@@ -74,12 +74,12 @@ int yylex(void);
return ARITH_NUM;
}
-0[0-7]+ {
+0[0-7]* {
yylval.l_value = strtoarith_t(yytext, NULL, 8);
return ARITH_NUM;
}
-[0-9]+ {
+[1-9][0-9]* {
yylval.l_value = strtoarith_t(yytext, NULL, 10);
return ARITH_NUM;
}
Added: head/tools/regression/bin/sh/expansion/arith8.0
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/regression/bin/sh/expansion/arith8.0 Sat Dec 18 23:03:51
2010 (r216547)
@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+v=$( (eval ': $((08))') 2>&1 >/dev/null)
+[ $? -ne 0 ] && [ -n "$v" ]
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