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[2/3] btrfs-progs: cleanup device stat usage prompt

Message ID 1394077008-3568-2-git-send-email-guihc.fnst@cn.fujitsu.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Gui Hecheng March 6, 2014, 3:36 a.m. UTC 
1. use usage() to replace the fprintf()
2. use check_argc_exact() to replace "argc != ..."

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
---
 cmds-device.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)
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Patch

diff --git a/cmds-device.c b/cmds-device.c
index ad59600..5009d9a 100644
--- a/cmds-device.c
+++ b/cmds-device.c
@@ -324,18 +324,13 @@  static int cmd_dev_stats(int argc, char **argv)
 			break;
 		case '?':
 		default:
-			fprintf(stderr, "ERROR: device stat args invalid.\n"
-					" device stat [-z] <path>|<device>\n"
-					" -z  to reset stats after reading.\n");
-			return 1;
+			usage(cmd_dev_stats_usage);
 		}
 	}
 
-	if (optind + 1 != argc) {
-		fprintf(stderr, "ERROR: device stat needs path|device as single"
-			" argument\n");
-		return 1;
-	}
+	argc = argc - optind;
+	if (check_argc_exact(argc, 1))
+		usage(cmd_dev_stats_usage);
 
 	dev_path = argv[optind];