1 files changed, 46 insertions, 0 deletions
diff --git a/lib/libc/stat/fstatat.c b/lib/libc/stat/fstatat.c
new file mode 100644
index 00000000..06b00163
--- /dev/null
+++ b/lib/libc/stat/fstatat.c
@@ -0,0 +1,46 @@
+#include <sys/stat.h>
+#include <syscall.h>
+
+#include <linux/stat.h>
+
+#define makedev(major, minor)                \
+	((((major) & 0xfffff000ULL) << 32) | \
+	 (((major) & 0x00000fffULL) << 8) |  \
+	 (((minor) & 0xffffff00ULL) << 12) | (((minor) & 0x000000ffULL)))
+
+int fstatat(int fd, const char *restrict path, struct stat *restrict buf,
+	    int flag)
+{
+	int ret;
+	struct statx stx = { 0 };
+
+	ret = syscall(statx, fd, path, flag, 0x7ff, &stx);
+
+	if (ret == 0) {
+		if (stx.stx_mask & STATX_BASIC_STATS) {
+			buf->st_dev =
+				makedev(stx.stx_dev_major, stx.stx_dev_minor);
+			buf->st_ino = stx.stx_ino;
+			buf->st_mode = stx.stx_mode;
+			buf->st_nlink = stx.stx_nlink;
+			buf->st_uid = stx.stx_uid;
+			buf->st_gid = stx.stx_gid;
+			buf->st_rdev =
+				makedev(stx.stx_rdev_major, stx.stx_rdev_minor);
+			buf->st_size = stx.stx_size;
+			buf->st_atim.tv_sec = stx.stx_atime.tv_sec;
+			buf->st_atim.tv_nsec = stx.stx_atime.tv_nsec;
+			buf->st_mtim.tv_sec = stx.stx_mtime.tv_sec;
+			buf->st_mtim.tv_nsec = stx.stx_mtime.tv_nsec;
+			buf->st_ctim.tv_sec = stx.stx_ctime.tv_sec;
+			buf->st_ctim.tv_nsec = stx.stx_ctime.tv_nsec;
+			buf->st_blksize = stx.stx_blksize;
+			buf->st_blocks = stx.stx_blocks;
+		} else {
+			ret = -1; // Indicate failure if STATX_BASIC_STATS is
+				  // not set
+		}
+	}
+
+	return ret;
+}