Get rid of major/minor number distinction.

As of FreeBSD 6, devices can only be opened through devfs. These device
nodes don't have major and minor numbers anymore. The st_rdev field in
struct stat is simply based a copy of st_ino.

Simply display device numbers as hexadecimal, using "%#jx". This is
allowed by POSIX, since it explicitly states things like the following
(example taken from ls(1)):

	"If the file is a character special or block special file, the
	size of the file may be replaced with implementation-defined
	information associated with the device in question."

This makes the output of these commands more compact. For example, ls(1)
now uses approximately four columns less. While there, simplify the
column length calculation from ls(1) by calling snprintf() with a NULL
buffer.

Don't be afraid; if needed one can still obtain individual major/minor
numbers using stat(1).

4 files changed, 20 insertions, 39 deletions

diff --git a/bin/ls/ls.1 b/bin/ls/ls.1
index 3b23df4..cc5ff48 100644
--- a/bin/ls/ls.1
+++ b/bin/ls/ls.1
@@ -32,7 +32,7 @@
 .\"     @(#)ls.1	8.7 (Berkeley) 7/29/94
 .\" $FreeBSD$
 .\"
-.Dd April 4, 2008
+.Dd September 28, 2011
 .Dt LS 1
 .Os
 .Sh NAME
@@ -357,8 +357,7 @@ option is given,
 the numeric ID's are displayed.
 .Pp
 If the file is a character special or block special file,
-the major and minor device numbers for the file are displayed
-in the size field.
+the device number for the file is displayed in the size field.
 If the file is a symbolic link the pathname of the
 linked-to file is preceded by
 .Dq Li -> .
diff --git a/bin/ls/ls.c b/bin/ls/ls.c
index e482e22..569f3d9 100644
--- a/bin/ls/ls.c
+++ b/bin/ls/ls.c
@@ -563,7 +563,7 @@ display(const FTSENT *p, FTSENT *list, int options)
 	long maxblock;
 	u_long btotal, labelstrlen, maxinode, maxlen, maxnlink;
 	u_long maxlabelstr;
-	u_int devstrlen;
+	u_int sizelen;
 	int maxflags;
 	gid_t maxgroup;
 	uid_t maxuser;
@@ -572,7 +572,6 @@ display(const FTSENT *p, FTSENT *list, int options)
 	int entries, needstats;
 	const char *user, *group;
 	char *flags, *labelstr = NULL;
-	char buf[STRBUF_SIZEOF(u_quad_t) + 1];
 	char ngroup[STRBUF_SIZEOF(uid_t) + 1];
 	char nuser[STRBUF_SIZEOF(gid_t) + 1];
 
@@ -656,7 +655,8 @@ display(const FTSENT *p, FTSENT *list, int options)
 		MAKENINES(maxsize);
 		free(jinitmax);
 	}
-	devstrlen = 0;
+	d.s_size = 0;
+	sizelen = 0;
 	flags = NULL;
 	for (cur = list, entries = 0; cur; cur = cur->fts_link) {
 		if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
@@ -796,14 +796,12 @@ label_out:
 				np->group = &np->data[ulen + 1];
 				(void)strcpy(np->group, group);
 
-				if ((S_ISCHR(sp->st_mode) ||
-				    S_ISBLK(sp->st_mode)) &&
-				    devstrlen < DEVSTR_HEX_LEN) {
-					if (minor(sp->st_rdev) > 255 ||
-					    minor(sp->st_rdev) < 0)
-						devstrlen = DEVSTR_HEX_LEN;
-					else
-						devstrlen = DEVSTR_LEN;
+				if (S_ISCHR(sp->st_mode) ||
+				    S_ISBLK(sp->st_mode)) {
+					sizelen = snprintf(NULL, 0,
+					    "%#jx", (uintmax_t)sp->st_rdev);
+					if (d.s_size < sizelen)
+						d.s_size = sizelen;
 				}
 
 				if (f_flags) {
@@ -837,23 +835,16 @@ label_out:
 	d.maxlen = maxlen;
 	if (needstats) {
 		d.btotal = btotal;
-		(void)snprintf(buf, sizeof(buf), "%lu", maxblock);
-		d.s_block = strlen(buf);
+		d.s_block = snprintf(NULL, 0, "%lu", maxblock);
 		d.s_flags = maxflags;
 		d.s_label = maxlabelstr;
 		d.s_group = maxgroup;
-		(void)snprintf(buf, sizeof(buf), "%lu", maxinode);
-		d.s_inode = strlen(buf);
-		(void)snprintf(buf, sizeof(buf), "%lu", maxnlink);
-		d.s_nlink = strlen(buf);
-		if (f_humanval)
-			d.s_size = HUMANVALSTR_LEN;
-		else {
-			(void)snprintf(buf, sizeof(buf), "%ju", maxsize);
-			d.s_size = strlen(buf);
-		}
-		if (d.s_size < devstrlen)
-			d.s_size = devstrlen;
+		d.s_inode = snprintf(NULL, 0, "%lu", maxinode);
+		d.s_nlink = snprintf(NULL, 0, "%lu", maxnlink);
+		sizelen = f_humanval ? HUMANVALSTR_LEN :
+		    snprintf(NULL, 0, "%ju", maxsize);
+		if (d.s_size < sizelen)
+			d.s_size = sizelen;
 		d.s_user = maxuser;
 	}
 	printfcn(&d);
diff --git a/bin/ls/ls.h b/bin/ls/ls.h
index a74abf0..ee2a7a5 100644
--- a/bin/ls/ls.h
+++ b/bin/ls/ls.h
@@ -36,8 +36,6 @@
 #define NO_PRINT	1
 
 #define HUMANVALSTR_LEN	5
-#define DEVSTR_LEN	8
-#define DEVSTR_HEX_LEN	15
 
 extern long blocksize;		/* block size units */
 
diff --git a/bin/ls/print.c b/bin/ls/print.c
index 3f2033c..a788042 100644
--- a/bin/ls/print.c
+++ b/bin/ls/print.c
@@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
 #include <langinfo.h>
 #include <libutil.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
@@ -351,16 +352,8 @@ printaname(const FTSENT *p, u_long inodefield, u_long sizefield)
 static void
 printdev(size_t width, dev_t dev)
 {
-	char buf[DEVSTR_HEX_LEN + 1];
 
-	if (minor(dev) > 255 || minor(dev) < 0)
-		(void)snprintf(buf, sizeof(buf), "%3d, 0x%08x",
-		    major(dev), (u_int)minor(dev));
-	else
-		(void)snprintf(buf, sizeof(buf), "%3d, %3d",
-		    major(dev), minor(dev));
-
-	(void)printf("%*s ", (u_int)width, buf);
+	(void)printf("%#*jx ", (u_int)width, (uintmax_t)dev);
 }
 
 static void