Re: bin/57544: sed(1) and regex(3) problem with encoding

[RVP <rvp%SDF.ORG@localhost>]

The following reply was made to PR bin/57544; it has been noted by GNATS.

From: RVP <rvp%SDF.ORG@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: bin/57544: sed(1) and regex(3) problem with encoding
Date: Wed, 26 Jul 2023 17:19:44 +0000 (UTC)

 On Wed, 26 Jul 2023, tlaronde%polynum.com@localhost wrote:
 
 > $ export LC_CTYPE=fr_FR.ISO8859-15
 >
 > and then:
 >
 > $ echo "??" | sed 's/??\&eacute;/g'
 > sed: 1: "s/??\&eacute;/g": RE error: trailing backslash (\)
 >
 
 Not running NetBSD right now, but, FreeBSD 13.2 has the same issue which
 can be seen even with a plain grep(1)--as it relies on the libc regexp
 engine.
 
 Can you try the patch below (it is for NetBSD):
 
 ```
 diff -urN src/lib/libc/regex.orig/regcomp.c src/lib/libc/regex/regcomp.c
 --- src/lib/libc/regex.orig/regcomp.c	2022-12-21 17:44:15.000000000 +0000
 +++ src/lib/libc/regex/regcomp.c	2023-07-26 17:05:50.832242252 +0000
 @@ -898,7 +898,7 @@
   	handled = false;
 
   	assert(MORE());		/* caller should have ensured this */
 -	c = GETNEXT();
 +	c = (unsigned char)GETNEXT();
   	if (c == '\\') {
   		(void)REQUIRE(MORE(), REG_EESCAPE);
   		cc = GETNEXT();
 ```
 
 -RVP