Date: Sun, 9 Nov 2008 01:10:21 +0000 (UTC) From: Hiroki Sato <hrs@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r184777 - head/usr.bin/sed Message-ID: <200811090110.mA91ALkc026621@svn.freebsd.org>
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Author: hrs Date: Sun Nov 9 01:10:21 2008 New Revision: 184777 URL: http://svn.freebsd.org/changeset/base/184777 Log: 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/' PR: bin/126682 MFC after: 1 week Modified: head/usr.bin/sed/compile.c Modified: head/usr.bin/sed/compile.c ============================================================================== --- head/usr.bin/sed/compile.c Sun Nov 9 00:49:36 2008 (r184776) +++ head/usr.bin/sed/compile.c Sun Nov 9 01:10:21 2008 (r184777) @@ -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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