wm: teppich

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ls: add usage

--- a/cmd/ls.c

+++ b/cmd/ls.c

@@ -1,9 +1,15 @@

 #include <u.h>

 #include <libc.h>

 #include <err.h>

-#include <mem.h>

 #include <vfs.h>

+static int

+usage()

+{

+	printf("ls: usage: ls [-l] dir\n");

+	return USAGE;

+}

+

 char*

 permtoletter(uint16 perms)

 {

@@ -48,7 +54,10 @@

 	{

 		lflag = 1;

 		argv++;

+		argc--;

 	}

+	if(argc != 2)

+		return usage();

 	fs = getfs(argv[1]);

 	if(fs == nil)

@@ -83,7 +92,6 @@

 		}

 		else

 		{

-

 			printf("%s", f->path);

 			printf("%s\n", f->name);

 		}