From f13d10a0afeec1c6e66b4717fd9f12faeda515ff Mon Sep 17 00:00:00 2001 From: kosaki Date: Sat, 12 Nov 2011 02:12:19 +0000 Subject: * io.c (setup_narg): fix off by one bug. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33714 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- io.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'io.c') diff --git a/io.c b/io.c index bb62d3de54..45931adacf 100644 --- a/io.c +++ b/io.c @@ -7959,13 +7959,12 @@ setup_narg(int cmd, VALUE *argp, int io_p) len = 256; rb_str_modify(arg); - if (len <= RSTRING_LEN(arg)) { - len = RSTRING_LEN(arg); - } - if (RSTRING_LEN(arg) < len) { + /* expand for data + sentinel. */ + if (RSTRING_LEN(arg) < len+1) { rb_str_resize(arg, len+1); } - RSTRING_PTR(arg)[len] = 17; /* a little sanity check here */ + /* a little sanity check here */ + RSTRING_PTR(arg)[RSTRING_LEN(arg) - 1] = 17; narg = (long)(SIGNED_VALUE)RSTRING_PTR(arg); } } -- cgit v1.2.3