Kernel/LibC: Add fstat() and remove stat() syscall

2 files changed, 11 insertions, 15 deletions

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;
-}