From e5aa5a96e8100b549ed72cdd2eee4b5f5060758f Mon Sep 17 00:00:00 2001
From: Ivan Chikish <nekotekina@gmail.com>
Date: Fri, 21 Jul 2023 19:51:15 +0300
Subject: [PATCH] [orbis-kernel] Hack sys_fstat

---
 orbis-kernel/src/sys/sys_descrip.cpp | 39 ++++++++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/orbis-kernel/src/sys/sys_descrip.cpp b/orbis-kernel/src/sys/sys_descrip.cpp
index 5899aef54..ff9893c20 100644
--- a/orbis-kernel/src/sys/sys_descrip.cpp
+++ b/orbis-kernel/src/sys/sys_descrip.cpp
@@ -27,8 +27,43 @@ orbis::SysResult orbis::sys_closefrom(Thread *thread, sint lowfd) {
   return ErrorCode::NOSYS;
 }
 orbis::SysResult orbis::sys_fstat(Thread *thread, sint fd, ptr<Stat> ub) {
-  ORBIS_LOG_TODO(__FUNCTION__, fd, ub);
-  return ErrorCode::NOSYS;
+  ORBIS_LOG_WARNING(__FUNCTION__, fd, ub);
+  thread->where();
+  if (fd == 0) {
+    return ErrorCode::PERM;
+  }
+
+  auto result = sys_lseek(thread, fd, 0, SEEK_CUR);
+  auto oldpos = thread->retval[0];
+  if (result.isError()) {
+    return result;
+  }
+
+  result = sys_lseek(thread, fd, 0, SEEK_END);
+  auto len = thread->retval[0];
+  if (result.isError()) {
+    return result;
+  }
+
+  result = sys_read(thread, fd, ub, 1);
+  if (result.isError()) {
+    *ub = {};
+    ub->mode = 0777 | 0x4000;
+  } else {
+    *ub = {};
+    ub->size = len;
+    ub->blksize = 1;
+    ub->blocks = len;
+    ub->mode = 0777 | 0x8000;
+  }
+
+  result = sys_lseek(thread, fd, oldpos, SEEK_SET);
+  if (result.isError()) {
+    return result;
+  }
+
+  thread->retval[0] = 0;
+  return {};
 }
 orbis::SysResult orbis::sys_nfstat(Thread *thread, sint fd,
                                    ptr<struct nstat> sb) {