K 10
svn:author
V 3
pfg
K 8
svn:date
V 27
2014-12-16T21:13:55.248635Z
K 7
svn:log
V 493
MFC	r275553, r275612;

patch(1): Bring fixes from OpenBSD

Check fstat return value.  Use off_t for file size and offsets.
Avoid iterating over end of string.

Introduce strtolinenum to properly check line numbers while parsing:
no signs, no spaces, just digits, 0 <= x <= LONG_MAX

Properly validate line ranges supplied in diff file to prevent overflows.
Also fixes an out of boundary memory access because the resulting values
are used as array indices.

PR:		195436
Obtained from:	OpenBSD

END