From 1b74462e5f96f5ca97f78a2ae9601bcd30ce0155 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Wed, 16 Mar 2016 22:49:20 +1300
Subject: ls(1) accepts one argument

---
 Makefile | 11 +++++++++++
 ls.c     | 13 ++++++++++---
 2 files changed, 21 insertions(+), 3 deletions(-)
 create mode 100644 Makefile

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1a71395
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,11 @@
+.PHONY: all clean
+
+CC = clang
+CFLAGS = -std=c90 -Weverything
+
+all : ls
+
+clean :
+	rm -f -- *.o
+	rm -f ls
+
diff --git a/ls.c b/ls.c
index 768897d..4b48c9c 100644
--- a/ls.c
+++ b/ls.c
@@ -3,12 +3,19 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-int main(void)
+int main(int argc, char **argv)
 {
-    struct dirent *dirent;
+    char *dirname;
     DIR *dir;
+    struct dirent *dirent;
+
+    if (argc > 1) {
+        dirname = argv[1];
+    } else {
+        dirname = ".";
+    }
 
-    dir = opendir(".");
+    dir = opendir(dirname);
 
     while ((dirent = readdir(dir)) != NULL) {
         fprintf(stdout, "%s\n", dirent->d_name);
-- 
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