fix exit codes (1 on error, 0 on success)

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18705 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/bin/unmount.c

@@ -20,7 +20,7 @@ usage(const char *programName)
 	
 	printf("usage: %s [-f] <path to volume>\n"
 		"\t-f\tforces unmounting in case of open files left\n", programName);
-	exit(0);
+	exit(1);
 }
 
 
@@ -60,7 +60,7 @@ main(int argc, char **argv)
 
 	if (stat(path, &pathStat) < 0) {
 		fprintf(stderr, "%s: The path \"%s\" is not accessible\n", programName, path);
-		return -1;
+		return 1;
 	}
 
 	/* do the work */
@@ -68,7 +68,7 @@ main(int argc, char **argv)
 	status = fs_unmount_volume(path, flags);
 	if (status != B_OK) {
 		fprintf(stderr, "%s: unmounting failed: %s\n", programName, strerror(status));
-		return -1;
+		return 1;
 	}
 
 	return 0;