[PATCH] mount: Fix losetup usage()

[Kamalesh Babulal <kamalesh@xxxxxxxxxxxxxxxxxx>]

Hi,

Currently usage() of losetup returns 1 instead of 0, when
invoked with --help and invalid usage. Following patch
alters usage() to return 0, when invoked with --help and
not treat it as an invalid command usage.

Signed-off-by: Kamalesh Babulal <kamalesh@xxxxxxxxxxxxxxxxxx>
--
 mount/lomount.c |   29 ++++++++++++++++-------------
 1 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/mount/lomount.c b/mount/lomount.c
index 6130be1..ffa80c0 100644
--- a/mount/lomount.c
+++ b/mount/lomount.c
@@ -884,7 +884,7 @@ find_unused_loop_device (void) {
 #include "strtosize.h"
 
 static void
-usage(void) {
+usage(FILE *fp, int n) {
 	fprintf(stderr, _("\nUsage:\n"
   " %1$s loop_device                             give info\n"
   " %1$s -a | --all                              list all used\n"
@@ -904,7 +904,7 @@ usage(void) {
   " -r | --read-only         setup read-only loop device\n"
   "      --show              print device name (with -f <file>)\n"
   " -v | --verbose           verbose mode\n\n"));
-	exit(1);
+	exit(n);
  }
 
 int
@@ -966,6 +966,9 @@ main(int argc, char **argv) {
 		case 'f':
 			find = 1;
 			break;
+		case 'h':
+			usage(stdout, 0);
+			break;
 		case 'j':
 			assoc = optarg;
 			break;
@@ -987,42 +990,42 @@ main(int argc, char **argv) {
                         break;
 
 		default:
-			usage();
+			usage(stderr, 1);
 		}
 	}
 
 	if (argc == 1) {
-		usage();
+		usage(stderr, 1);
 	} else if (delete) {
 		if (argc < optind+1 || encryption || offset || sizelimit ||
 		    capacity || find || all || showdev || assoc || ro)
-			usage();
+			usage(stderr, 1);
 	} else if (find) {
 		if (capacity || all || assoc || argc < optind || argc > optind+1)
-			usage();
+			usage(stderr, 1);
 	} else if (all) {
 		if (argc > 2)
-			usage();
+			usage(stderr, 1);
 	} else if (assoc) {
 		if (capacity || encryption || showdev || passfd || ro)
-			usage();
+			usage(stderr, 1);
 	} else if (capacity) {
 		if (argc != optind + 1 || encryption || offset || sizelimit ||
 		    showdev || ro)
-			usage();
+			usage(stderr, 1);
 	} else {
 		if (argc < optind+1 || argc > optind+2)
-			usage();
+			usage(stderr, 1);
 	}
 
 	if (offset && strtosize(offset, &off)) {
 		error(_("%s: invalid offset '%s' specified"), progname, offset);
-		usage();
+		usage(stderr, 1);
 	}
 	if (sizelimit && strtosize(sizelimit, &slimit)) {
 		error(_("%s: invalid sizelimit '%s' specified"),
 					progname, sizelimit);
-		usage();
+		usage(stderr, 1);
 	}
 
 	if (all)
@@ -1057,7 +1060,7 @@ main(int argc, char **argv) {
 		res = show_loop(device);
 	else {
 		if (passfd && sscanf(passfd, "%d", &pfd) != 1)
-			usage();
+			usage(stderr, 1);
 		do {
 			res = set_loop(device, file, off, slimit, encryption, pfd, &ro);
 			if (res == 2 && find) {
			
			Kamalesh
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