Add -n option to print numeric user and group IDs instead of names

in a long (-l) listing.

MFC-jockies should make sure that bde's concerns regarding the number
of digits required to represent a uid_t and the use of snprintf
on the associated PR have been addressed before going wild.

PR:	12866
Reported by:	Philip Kizer <pckizer@nostrum.com>
Obtained from:	NetBSD

bin/ls/ls.1

@@ -33,7 +33,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)ls.1	8.7 (Berkeley) 7/29/94
-.\"	$Id: ls.1,v 1.27 1999/04/27 23:33:52 hoek Exp $
+.\"	$Id: ls.1,v 1.28 1999/05/08 10:20:27 kris Exp $
 .\"
 .Dd July 29, 1994
 .Dt LS 1
@@ -148,6 +148,11 @@ not blocks.  This option overrides the environment variable BLOCKSIZE.
 (The lowercase letter ``ell.'')  List in long format. (See below.)
 If the output is to a terminal, a total sum for all the file
 sizes is output on a line before the long listing.
+.It Fl n
+Display user and group IDs numerically rather than converting to a user
+or group name in a long
+.Pq Fl l
+output.
 .It Fl o
 Include the file flags in a long
 .Pq Fl l
@@ -247,7 +252,10 @@ If the modification time of the file is more than 6 months
 in the past or future, then the year of the last modification
 is displayed in place of the hour and minute fields.
 .Pp
-If the owner or group names are not a known user or group name
+If the owner or group names are not a known user or group name,
+or the
+.Fl n
+option is given,
 the numeric ID's are displayed.
 .Pp
 If the file is a character special or block special file,

bin/ls/ls.c

@@ -45,7 +45,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)ls.c	8.5 (Berkeley) 4/2/94";
 #else
 static const char rcsid[] =
-	"$Id: ls.c,v 1.23 1998/08/02 22:47:11 hoek Exp $";
+	"$Id: ls.c,v 1.24 1999/05/08 10:20:30 kris Exp $";
 #endif
 #endif /* not lint */
 
@@ -88,6 +88,7 @@ int f_listdot;			/* list files beginning with . */
 int f_longform;			/* long listing format */
 int f_nonprint;			/* show unprintables as ? */
 int f_nosort;			/* don't sort output */
+int f_numericonly;		/* don't convert uid/gid to name */
 int f_octal;			/* show unprintables as \xxx */
 int f_octal_escape;		/* like f_octal but use C escapes if possible */
 int f_recursive;		/* ls subdirectories also */
@@ -137,7 +138,7 @@ main(argc, argv)
 		f_listdot = 1;
 
 	fts_options = FTS_PHYSICAL;
-	while ((ch = getopt(argc, argv, "1ABCFHLPRTWabcdfgikloqrstu")) != -1) {
+	while ((ch = getopt(argc, argv, "1ABCFHLPRTWabcdfgiklnoqrstu")) != -1) {
 		switch (ch) {
 		/*
 		 * The -1, -C and -l options all override each other so shell
@@ -209,6 +210,9 @@ main(argc, argv)
 		case 'k':
 			f_kblocks = 1;
 			break;
+		case 'n':
+			f_numericonly = 1;
+			break;
 		case 'o':
 			f_flags = 1;
 			break;
@@ -400,7 +404,8 @@ display(p, list)
 	int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser;
 	char *initmax;
 	int entries, needstats;
-	char *user, *group, *flags, buf[20];	/* 32 bits == 10 digits */
+	char *user, *group, *flags;
+	char nuser[12], ngroup[12], buf[21];	/* 32 bits == 10 digits */
 
 	/*
 	 * If list is NULL there are two possibilities: that the parent
@@ -512,10 +517,19 @@ display(p, list)
 
 			btotal += sp->st_blocks;
 			if (f_longform) {
-				user = user_from_uid(sp->st_uid, 0);
+				if (f_numericonly) {
+					(void)snprintf(nuser, sizeof(nuser),
+					    "%u", sp->st_uid);
+					(void)snprintf(ngroup, sizeof(ngroup),
+					    "%u", sp->st_gid);
+					user = nuser;
+					group = ngroup;
+				} else {
+					user = user_from_uid(sp->st_uid, 0);
+					group = group_from_gid(sp->st_gid, 0);
+				}
 				if ((ulen = strlen(user)) > maxuser)
 					maxuser = ulen;
-				group = group_from_gid(sp->st_gid, 0);
 				if ((glen = strlen(group)) > maxgroup)
 					maxgroup = glen;
 				if (f_flags) {

bin/ls/util.c

@@ -39,7 +39,7 @@
 static char sccsid[] = "@(#)util.c	8.3 (Berkeley) 4/2/94";
 #else
 static const char rcsid[] =
-	"$Id: util.c,v 1.17 1998/04/25 00:12:32 ache Exp $";
+	"$Id: util.c,v 1.18 1998/10/13 12:19:31 des Exp $";
 #endif
 #endif /* not lint */
 
@@ -158,7 +158,7 @@ prn_octal(s)
 void
 usage()
 {
-	(void)fprintf(stderr, "usage: ls [-ACFHLPRTWacdfgikloqrstu1]"
+	(void)fprintf(stderr, "usage: ls [-ACFHLPRTWacdfgiklnoqrstu1]"
 		      " [file ...]\n");
 	exit(1);
 }