From 00851d3d38e02321a7cea242809fae44529128f3 Mon Sep 17 00:00:00 2001
From: Alasdair Kergon <agk@redhat.com>
Date: Mon, 16 May 2005 16:04:30 +0000
Subject: [PATCH] Add --target to dmsetup ls.

---
 WHATS_NEW         |  2 +-
 dmsetup/dmsetup.c | 42 +++++++++++++++++++++++++++++++-----------
 man/dmsetup.8     |  6 ++++--
 3 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/WHATS_NEW b/WHATS_NEW
index 6fa4bec..a72f43d 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,7 +1,7 @@
 Version 1.01.02 - 
 =============================
   Call dm_lib_exit() and dm_lib_release() automatically now.
-  Add --target <target_type> filter to dmsetup table/status.
+  Add --target <target_type> filter to dmsetup table/status/ls.
   Fix dmsetup getopt_long usage.
 
 Version 1.01.01 - 29 Mar 2005
diff --git a/dmsetup/dmsetup.c b/dmsetup/dmsetup.c
index 19a53f8..9eab6a4 100644
--- a/dmsetup/dmsetup.c
+++ b/dmsetup/dmsetup.c
@@ -600,6 +600,14 @@ static int _process_all(int argc, char **argv,
 	return r;
 }
 
+static void _display_dev(struct dm_task *dmt, char *name)
+{
+	struct dm_info info;
+
+	if (dm_task_get_info(dmt, &info))
+		printf("%s\t(%u, %u)\n", name, info.major, info.minor);
+}
+
 static int _status(int argc, char **argv, void *data)
 {
 	int r = 0;
@@ -612,6 +620,7 @@ static int _status(int argc, char **argv, void *data)
 	struct dm_names *names = (struct dm_names *) data;
 	char *name = NULL;
 	int matched = 0;
+	int ls_only = 0;
 
 	if (data)
 		name = names->name;
@@ -627,6 +636,9 @@ static int _status(int argc, char **argv, void *data)
 	else
 		cmd = DM_DEVICE_STATUS;
 
+	if (!strcmp(argv[0], "ls"))
+		ls_only = 1;
+
 	if (!(dmt = dm_task_create(cmd)))
 		return 0;
 
@@ -647,19 +659,24 @@ static int _status(int argc, char **argv, void *data)
 		if (_switches[TARGET_ARG] && target_type &&
 		    strcmp(target_type, _target))
 			continue;
-		if (!matched && _switches[VERBOSE_ARG])
-			_display_info(dmt);
-		if (data && !_switches[VERBOSE_ARG])
-			printf("%s: ", name);
-		if (target_type) {
-			printf("%" PRIu64 " %" PRIu64 " %s %s",
-			       start, length, target_type, params);
+		if (ls_only) {
+			_display_dev(dmt, name);
+			next = NULL;
+		} else {
+			if (!matched && _switches[VERBOSE_ARG])
+				_display_info(dmt);
+			if (data && !_switches[VERBOSE_ARG])
+				printf("%s: ", name);
+			if (target_type) {
+				printf("%" PRIu64 " %" PRIu64 " %s %s",
+				       start, length, target_type, params);
+			}
+			printf("\n");
 		}
-		printf("\n");
 		matched = 1;
 	} while (next);
 
-	if (data && _switches[VERBOSE_ARG] && matched)
+	if (data && _switches[VERBOSE_ARG] && matched && !ls_only)
 		printf("\n");
 
 	r = 1;
@@ -842,7 +859,10 @@ static int _display_name(int argc, char **argv, void *data)
 
 static int _ls(int argc, char **argv, void *data)
 {
-	return _process_all(argc, argv, _display_name);
+	if (_switches[TARGET_ARG] && _target)
+		return _status(argc, argv, data);
+	else
+		return _process_all(argc, argv, _display_name);
 }
 
 /*
@@ -871,7 +891,7 @@ static struct command _commands[] = {
 	{"reload", "<device> [<table_file>]", 0, 2, _load},
 	{"rename", "<device> <new_name>", 1, 2, _rename},
 	{"message", "<device> <sector> <message>", 2, -1, _message},
-	{"ls", "", 0, 0, _ls},
+	{"ls", "[--target <target_type>]", 0, 0, _ls},
 	{"info", "[<device>]", 0, 1, _info},
 	{"deps", "[<device>]", 0, 1, _deps},
 	{"status", "[<device>] [--target <target_type>]", 0, 1, _status},
diff --git a/man/dmsetup.8 b/man/dmsetup.8
index b98454f..835494a 100644
--- a/man/dmsetup.8
+++ b/man/dmsetup.8
@@ -29,7 +29,7 @@ dmsetup \- low level logical volume management
 .B dmsetup rename
 .I device_name new_name
 .br
-.B dmsetup ls
+.B dmsetup ls [--target target_type]
 .br
 .B dmsetup info 
 .I [device_name]
@@ -145,8 +145,10 @@ Outputs some brief information about the device in the form:
 .br
     UUID
 .IP \fBls
+.I [--target target_type]
 .br
-List device names.
+List device names.  Optionally only list devices that have at least
+one target of the specified type.
 .IP \fBload|reload
 .I device_name [table_file]
 .br
-- 
2.43.5