Author: hrs
Date: Wed Nov 19 18:06:29 2008
New Revision: 185100
URL: http://svn.freebsd.org/changeset/base/185100
Log:
MFC: Add workaround for a back reference when no corresponding
parenthesized subexpression is defined. For example, the
following command line caused unexpected behavior like
segmentation fault:
% echo test | sed -e 's/test/\1/'
Approved by: re (kib)
PR: bin/126682
Modified:
stable/7/usr.bin/sed/ (props changed)
stable/7/usr.bin/sed/compile.c
Modified: stable/7/usr.bin/sed/compile.c
==============================================================================
--- stable/7/usr.bin/sed/compile.c Wed Nov 19 17:34:28 2008
(r185099)
+++ stable/7/usr.bin/sed/compile.c Wed Nov 19 18:06:29 2008
(r185100)
@@ -324,9 +324,17 @@ nonsel: /* Now parse the command */
if (p == NULL)
errx(1,
"%lu: %s: unterminated substitute pattern",
linenum, fname);
+
+ /* Compile RE with no case sensitivity temporarily */
+ if (*re == '\0')
+ cmd->u.s->re = NULL;
+ else
+ cmd->u.s->re = compile_re(re, 0);
--p;
p = compile_subst(p, cmd->u.s);
p = compile_flags(p, cmd->u.s);
+
+ /* Recompile RE with case sensitivity from "I" flag if
any */
if (*re == '\0')
cmd->u.s->re = NULL;
else
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