1 files changed, 61 insertions, 0 deletions
diff --git a/src/df.c b/src/df.c
new file mode 100644
index 0000000..9f9e275
--- /dev/null
+++ b/src/df.c
@@ -0,0 +1,61 @@
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define DF_USAGE "Usage: df [-k] [-P] [file...]"
+#define FS_NAME_LEN 256
+#define HEADER_FMT "Filesystem %u-blocks Used Available Capacity Mounted on\n"
+
+struct fs_results {
+	const char *name;
+	unsigned int total;
+	unsigned int used;
+	const char *root;
+};
+
+static void display_results(struct fs_results results[], size_t results_nb, bool display_in_kb) {
+	unsigned int block_size = display_in_kb ? 1024 : 512;
+	printf(HEADER_FMT, block_size);
+
+	for (size_t i = 0; i < results_nb; i++) {
+		struct fs_results cur = results[i];
+		unsigned int available = cur.total - cur.used;
+		unsigned int capacity = (cur.used / (float) cur.total) * 100;
+		printf("%s %d %d %d %d%% %s\n", cur.name, cur.total, cur.used, available, capacity, cur.root);
+	}
+
+}
+
+int df_main(int argc, char *argv[]) {
+	bool display_in_kb = false;
+	int ret = 0;
+
+	while ((ret = getopt(argc, argv, "kP")) != -1) {
+		switch (ret) {
+			case 'k':
+				display_in_kb = true;
+				break;
+
+			case 'P':
+				break;
+
+			default:
+				fputs(DF_USAGE, stderr);
+				return EXIT_FAILURE;
+		}
+	}
+
+	struct fs_results results[] = {
+		{
+			.name = "test",
+			.total = 872986112,
+			.used = 95206402,
+			.root = "/dev/test",
+		}
+	};
+
+	display_results(results, 1, false);
+
+	return 0;
+}