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

---
 userland/libc/sys/stat.h       | 30 ------------------------------
 userland/libc/sys/stat/fstat.c |  9 +++++++++
 userland/libc/sys/stat/stat.c  | 13 ++++++++-----
 3 files changed, 17 insertions(+), 35 deletions(-)
 delete mode 100644 userland/libc/sys/stat.h
 create mode 100644 userland/libc/sys/stat/fstat.c

(limited to 'userland/libc/sys')

diff --git a/userland/libc/sys/stat.h b/userland/libc/sys/stat.h
deleted file mode 100644
index 2fe6cdc..0000000
--- a/userland/libc/sys/stat.h
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef STAT_H
-#define STAT_H
-#include <sys/types.h>
-#include <time.h>
-
-struct stat {
-  dev_t st_dev;            // Device ID of device containing file.
-  ino_t st_ino;            // File serial number.
-  mode_t st_mode;          // Mode of file (see below).
-  nlink_t st_nlink;        // Number of hard links to the file.
-  uid_t st_uid;            // User ID of file.
-  gid_t st_gid;            // Group ID of file.
-  dev_t st_rdev;           // Device ID (if file is character or block special).
-  off_t st_size;           // For regular files, the file size in bytes.
-                           // For symbolic links, the length in bytes of the
-                           // pathname contained in the symbolic link.
-                           // For a shared memory object, the length in bytes.
-                           // For a typed memory object, the length in bytes.
-                           // For other file types, the use of this field is
-                           // unspecified.
-  struct timespec st_atime; // Last data access timestamp.
-  struct timespec st_mtime; // Last data modification timestamp.
-  struct timespec st_ctime; // Last file status change timestamp.
-  blksize_t st_blksize;    // A file system-specific preferred I/O block size
-                           // for this object. In some file system types, this
-                           // may vary from file to file.
-  blkcnt_t st_blocks;      // Number of blocks allocated for this object.
-};
-int stat(const char *path, struct stat *buf);
-#endif
diff --git a/userland/libc/sys/stat/fstat.c b/userland/libc/sys/stat/fstat.c
new file mode 100644
index 0000000..13b2b04
--- /dev/null
+++ b/userland/libc/sys/stat/fstat.c
@@ -0,0 +1,9 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <syscall.h>
+
+int fstat(int fd, struct stat *buf) {
+  RC_ERRNO(syscall(SYS_FSTAT, fd, buf, 0, 0, 0));
+}
diff --git a/userland/libc/sys/stat/stat.c b/userland/libc/sys/stat/stat.c
index e37223e..00b4f52 100644
--- a/userland/libc/sys/stat/stat.c
+++ b/userland/libc/sys/stat/stat.c
@@ -1,13 +1,16 @@
 #include <assert.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <sys/stat.h>
 #include <syscall.h>
 
 int stat(const char *path, struct stat *buf) {
-  SYS_STAT_PARAMS args = {
-      .pathname = path,
-      .statbuf = buf,
-  };
-  RC_ERRNO(syscall(SYS_STAT, &args, 0, 0, 0, 0));
+  int fd = open(path, O_RDONLY);
+  if (-1 == fd) {
+    return -1;
+  }
+  int rc = fstat(fd, buf);
+  close(fd);
+  return rc;
 }
-- 
cgit v1.2.3