From 3f79b7bd553a52fca7a098f5195b406ff9970491 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Sun, 15 Jan 2023 01:13:51 +0100
Subject: add list and static library builder

---
 core/ls.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 core/ls.c

(limited to 'core/ls.c')

diff --git a/core/ls.c b/core/ls.c
new file mode 100644
index 0000000..6a25a3f
--- /dev/null
+++ b/core/ls.c
@@ -0,0 +1,78 @@
+#include "../lib/sys/sizes.h"
+#include "../lib/sys/getdents.h"
+#include "../lib/io/io.h"
+#include "../lib/list/list.h"
+#include "../lib/arg/arg.h"
+
+#define BUF_SIZE sizeof(struct dirent) * 32
+
+enum {
+	FILTER_NONE   = 0,
+	FILTER_HIDDEN = 1,
+} filter = FILTER_HIDDEN;
+
+list_t *dirs;
+
+
+void set_filter_none()
+{
+	filter = FILTER_NONE;
+}
+
+
+void add_dir(const char *path)
+{
+	list_append(dirs, (void*)path);
+}
+
+
+u8 filter_entry(struct dirent *d)
+{
+	switch (filter) {
+		case FILTER_HIDDEN:
+			return d->d_name[0] != '.';
+		case FILTER_NONE:
+			return 1;
+	}
+}
+
+
+int main(int argc, const char *argv[])
+{
+	int                  fd;
+	char                 d_type;
+	char                 buf[BUF_SIZE];
+	long                 nread;
+	struct dirent *d;
+	dirs = new_list();
+
+	arg_register_flag("-a", &set_filter_none);
+	arg_register_default(&add_dir);
+	arg_parse_arg(argc, argv);
+
+	if (dirs->size == 0) {
+		list_append(dirs, ".");
+	}
+
+	for (list_node_t *node = dirs->first; node; node = node->next) {
+		fd = open(node->value, OPEN_READ_ONLY | OPEN_DIRECTORY, 0);
+
+		while (1) {
+			nread = getdents(fd, buf, BUF_SIZE);
+
+			if (nread == 0)
+				break;
+
+			for (u64 bpos = 0; bpos < nread;) {
+				d = (struct dirent*) (buf + bpos);
+				if (filter_entry(d))
+					wstdf("%s\n", d->d_name);
+				bpos += d->d_reclen;
+			}
+		}
+
+		close(fd);
+	}
+
+	return 0;
+}
-- 
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