From f5a76d8eaba565e2a532faf659efe2848d605163 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Fri, 10 Feb 2023 16:02:19 +0100
Subject: add rm (using rmdir and unlink syscalls)

---
 core/rm.c        | 25 +++++++++++++++++++++++++
 lib/sys/rmdir.h  | 11 +++++++++++
 lib/sys/unlink.h | 11 +++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 core/rm.c
 create mode 100644 lib/sys/rmdir.h
 create mode 100644 lib/sys/unlink.h

diff --git a/core/rm.c b/core/rm.c
new file mode 100644
index 0000000..a9ea996
--- /dev/null
+++ b/core/rm.c
@@ -0,0 +1,25 @@
+#include "../lib/sys/rmdir.h"
+#include "../lib/sys/unlink.h"
+#include "../lib/sys/stat.h"
+#include "../lib/sys/errno.h"
+#include "../lib/io/io.h"
+
+int main(int argc, char **argv)
+{
+	stat_t st;
+	int err;
+	for (int i = 1; i < argc; ++i) {
+		if ((err = stat(argv[i], &st)) < 0) {
+			wff(STDERR_FD, "rm: %s %s\n", argv[i], errstr[-err]);
+			continue;
+		}
+
+		if (st.mode & S_IFREG) {
+			unlink(argv[i]);
+		} else if (st.mode & S_IFDIR) {
+			rmdir(argv[i]);
+		} else {
+			wff(STDERR_FD, "rm %s not of type 'regular file' or 'directory'\n", argv[i]);
+		}
+	}
+}
diff --git a/lib/sys/rmdir.h b/lib/sys/rmdir.h
new file mode 100644
index 0000000..1656ee9
--- /dev/null
+++ b/lib/sys/rmdir.h
@@ -0,0 +1,11 @@
+#ifndef RMDIR_H
+#define RMDIR_H
+
+#include "syscalls.h"
+
+int rmdir(const char *pathname)
+{
+	return syscall(RMDIR, pathname);
+}
+
+#endif
diff --git a/lib/sys/unlink.h b/lib/sys/unlink.h
new file mode 100644
index 0000000..a0f66e3
--- /dev/null
+++ b/lib/sys/unlink.h
@@ -0,0 +1,11 @@
+#ifndef UNLINK_H
+#define UNLINK_H
+
+#include "syscalls.h"
+
+int unlink(const char *pathname)
+{
+	return syscall(UNLINK, pathname);
+}
+
+#endif
-- 
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