From 620d37f41747e943648544d1fd1567d386c91e04 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 17 Apr 2024 17:06:16 +0200
Subject: Kernel/LibC: Add fstat() and remove stat() syscall

---
 kernel/syscalls/fstat.c | 11 +++++++++++
 kernel/syscalls/stat.c  | 15 ---------------
 2 files changed, 11 insertions(+), 15 deletions(-)
 create mode 100644 kernel/syscalls/fstat.c
 delete mode 100644 kernel/syscalls/stat.c

(limited to 'kernel/syscalls')

diff --git a/kernel/syscalls/fstat.c b/kernel/syscalls/fstat.c
new file mode 100644
index 0000000..38346e3
--- /dev/null
+++ b/kernel/syscalls/fstat.c
@@ -0,0 +1,11 @@
+#include <errno.h>
+#include <fs/vfs.h>
+#include <syscalls.h>
+
+int syscall_fstat(int fd, struct stat *buf) {
+  if (!mmu_is_valid_userpointer(buf, sizeof(struct stat))) {
+    return -EPERM; // TODO: Is this correct? The spec says nothing about
+                   // this case.
+  }
+  return vfs_fstat(fd, buf);
+}
diff --git a/kernel/syscalls/stat.c b/kernel/syscalls/stat.c
deleted file mode 100644
index 83ad3f0..0000000
--- a/kernel/syscalls/stat.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <errno.h>
-#include <fs/vfs.h>
-#include <syscalls.h>
-
-int syscall_stat(SYS_STAT_PARAMS *args) {
-  const char *pathname = copy_and_allocate_user_string(args->pathname);
-  struct stat *statbuf = args->statbuf;
-  int fd = vfs_open(pathname, O_READ, 0);
-  if (0 > fd) {
-    return -ENOENT;
-  }
-  int rc = vfs_fstat(fd, statbuf);
-  vfs_close(fd);
-  return rc;
-}
-- 
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