Support UTF-8: use wcwidth(3) for column adjustment and replace

non-printable Unicode codepoints and invalid bytes with ASCII
question marks.  No change for the SMALL version.

Using ideas developed by tedu@, phessler@, bentley@ and feedback from many.
OK yasuoka@ czarkoff@ sthen@.

bin/ls/Makefile

@@ -1,7 +1,7 @@
-#	$OpenBSD: Makefile,v 1.7 2003/08/06 19:09:09 tedu Exp $
+#	$OpenBSD: Makefile,v 1.8 2015/12/01 18:36:13 schwarze Exp $
 
 PROG=	ls
-SRCS=	cmp.c ls.c main.c print.c util.c
+SRCS=	cmp.c ls.c main.c print.c util.c utf8.c
 DPADD= ${LIBUTIL}
 LDADD= -lutil
 

bin/ls/extern.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: extern.h,v 1.9 2003/06/02 23:32:08 millert Exp $	*/
+/*	$OpenBSD: extern.h,v 1.10 2015/12/01 18:36:13 schwarze Exp $	*/
 /*	$NetBSD: extern.h,v 1.5 1995/03/21 09:06:24 cgd Exp $	*/
 
 /*-
@@ -45,7 +45,7 @@ int	 revstatcmp(const FTSENT *, const FTSENT *);
 int	 sizecmp(const FTSENT *, const FTSENT *);
 int	 revsizecmp(const FTSENT *, const FTSENT *);
 
-int	 putname(char *);
+int	 mbsprint(const char *, int);
 void	 printcol(DISPLAY *);
 void	 printacol(DISPLAY *);
 void	 printlong(DISPLAY *);

bin/ls/ls.1

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: ls.1,v 1.72 2015/04/24 10:57:36 sobrado Exp $
+.\"	$OpenBSD: ls.1,v 1.73 2015/12/01 18:36:13 schwarze Exp $
 .\"	$NetBSD: ls.1,v 1.14 1995/12/05 02:44:01 jtc Exp $
 .\"
 .\" Copyright (c) 1980, 1990, 1991, 1993, 1994
@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)ls.1	8.7 (Berkeley) 7/29/94
 .\"
-.Dd $Mdocdate: April 24 2015 $
+.Dd $Mdocdate: December 1 2015 $
 .Dt LS 1
 .Os
 .Sh NAME
@@ -440,6 +440,12 @@ If this variable contains a string representing a
 decimal integer, it is used as the
 column position width for displaying
 multiple-text-column output.
+.It Ev LC_CTYPE
+If set to a string ending in
+.Qq .UTF-8 ,
+.Nm
+respects character display widths when columnating output.
+Otherwise, non-ASCII bytes are replaced by question marks.
 .It Ev TZ
 The time zone to use when displaying dates.
 See

bin/ls/ls.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: ls.c,v 1.43 2015/10/09 01:37:06 deraadt Exp $	*/
+/*	$OpenBSD: ls.c,v 1.44 2015/12/01 18:36:13 schwarze Exp $	*/
 /*	$NetBSD: ls.c,v 1.18 1996/07/09 09:16:29 mycroft Exp $	*/
 
 /*
@@ -48,6 +48,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>
+#include <locale.h>
 #include <util.h>
 
 #include "ls.h"
@@ -103,6 +104,10 @@ ls_main(int argc, char *argv[])
 	int kflag = 0, width = 0;
 	char *p;
 
+#ifndef SMALL
+	setlocale(LC_CTYPE, "");
+#endif
+
 	/* Terminal defaults to -Cq, non-terminal defaults to -1. */
 	if (isatty(STDOUT_FILENO)) {
 		if ((p = getenv("COLUMNS")) != NULL)
@@ -428,6 +433,7 @@ display(FTSENT *p, FTSENT *list)
 	ino_t maxinode;
 	int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser;
 	int entries, needstats;
+	int width;
 	char *user, *group, buf[21];	/* 64 bits == 20 digits */
 	char nuser[12], ngroup[12];
 	char *flags = NULL;
@@ -474,8 +480,8 @@ display(FTSENT *p, FTSENT *list)
 				continue;
 			}
 		}
-		if (cur->fts_namelen > maxlen)
+		if ((width = mbsprint(cur->fts_name, 0)) > maxlen)
-			maxlen = cur->fts_namelen;
+			maxlen = width;
 		if (needstats) {
 			sp = cur->fts_statp;
 			if (sp->st_blocks > maxblock)

bin/ls/print.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: print.c,v 1.34 2015/03/15 00:41:27 millert Exp $	*/
+/*	$OpenBSD: print.c,v 1.35 2015/12/01 18:36:13 schwarze Exp $	*/
 /*	$NetBSD: print.c,v 1.15 1996/12/11 03:25:39 thorpej Exp $	*/
 
 /*
@@ -122,7 +122,7 @@ printlong(DISPLAY *dp)
 			printtime(sp->st_ctime);
 		else
 			printtime(sp->st_mtime);
-		(void)putname(p->fts_name);
+		(void)mbsprint(p->fts_name, 1);
 		if (f_type || (f_typedir && S_ISDIR(sp->st_mode)))
 			(void)printtype(sp->st_mode);
 		if (S_ISLNK(sp->st_mode))
@@ -231,7 +231,7 @@ printaname(FTSENT *p, u_long inodefield, u_long sizefield)
 	if (f_size)
 		chcnt += printf("%*qd ",
 		    (int)sizefield, howmany(sp->st_blocks, blocksize));
-	chcnt += putname(p->fts_name);
+	chcnt += mbsprint(p->fts_name, 1);
 	if (f_type || (f_typedir && S_ISDIR(sp->st_mode)))
 		chcnt += printtype(sp->st_mode);
 	return (chcnt);
@@ -310,7 +310,8 @@ printstream(DISPLAY *dp)
 			continue;
 		if (col > 0) {
 			(void)putchar(','), col++;
-			if (col + 1 + extwidth + p->fts_namelen >= termwidth)
+			if (col + 1 + extwidth + mbsprint(p->fts_name, 0) >=
+			    termwidth)
 				(void)putchar('\n'), col = 0;
 			else
 				(void)putchar(' '), col++;
@@ -361,7 +362,7 @@ printlink(FTSENT *p)
 	}
 	path[lnklen] = '\0';
 	(void)printf(" -> ");
-	(void)putname(path);
+	(void)mbsprint(path, 1);
 }
 
 static void

bin/ls/utf8.c

@@ -0,0 +1,51 @@
+/*	$OpenBSD: utf8.c,v 1.1 2015/12/01 18:36:13 schwarze Exp $	*/
+
+/*
+ * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef SMALL
+#include <stdio.h>
+#include <stdlib.h>
+#include <wchar.h>
+
+int
+mbsprint(const char *mbs, int print)
+{
+	wchar_t	  wc;
+	int	  len;  /* length in bytes of UTF-8 encoded string */
+	int	  width;  /* display width of a single Unicode char */
+	int	  total_width;  /* display width of the whole string */
+
+	for (total_width = 0; *mbs != '\0'; mbs += len) {
+		if ((len = mbtowc(&wc, mbs, MB_CUR_MAX)) == -1) {
+			(void)mbtowc(NULL, NULL, MB_CUR_MAX);
+			if (print)
+				putchar('?');
+			total_width++;
+			len = 1;
+		} else if ((width = wcwidth(wc)) == -1) {
+			if (print)
+				putchar('?');
+			total_width++;
+		} else {
+			if (print)
+				fwrite(mbs, 1, len, stdout);
+			total_width += width;
+		}
+	}
+	return total_width;
+}
+#endif

bin/ls/util.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: util.c,v 1.16 2013/11/21 15:54:45 deraadt Exp $	*/
+/*	$OpenBSD: util.c,v 1.17 2015/12/01 18:36:13 schwarze Exp $	*/
 /*	$NetBSD: util.c,v 1.12 1995/09/07 06:43:02 jtc Exp $	*/
 
 /*
@@ -45,15 +45,20 @@
 #include "ls.h"
 #include "extern.h"
 
+#ifdef SMALL
 int
-putname(char *name)
+mbsprint(const char *name, int print)
 {
 	int len;
 
+	if (print == 0)
+		return strlen(name);
+
 	for (len = 0; *name; len++, name++)
 		putchar((!isprint((unsigned char)*name) && f_nonprint) ? '?' : *name);
 	return len;
 }
+#endif
 
 void
 usage(void)