From 9a41dda02922cc210915a044af57ea90bf68a662 Mon Sep 17 00:00:00 2001
From: Sergey Bugaev <bugaevc@gmail.com>
Date: Sat, 28 Sep 2019 23:00:38 +0300
Subject: [PATCH] Kernel: Expose blocking and cloexec fd flags in ProcFS

---
 Kernel/FileSystem/ProcFS.cpp | 4 ++++
 Kernel/Process.cpp           | 9 +++++++++
 Kernel/Process.h             | 1 +
 3 files changed, 14 insertions(+)

diff --git a/Kernel/FileSystem/ProcFS.cpp b/Kernel/FileSystem/ProcFS.cpp
index 23c05c1dd83..ba5819412d6 100644
--- a/Kernel/FileSystem/ProcFS.cpp
+++ b/Kernel/FileSystem/ProcFS.cpp
@@ -211,12 +211,16 @@ Optional<KBuffer> procfs$pid_fds(InodeIdentifier identifier)
         auto* description = process.file_description(i);
         if (!description)
             continue;
+        bool cloexec = process.fd_flags(i) & FD_CLOEXEC;
+
         JsonObjectSerializer description_object = array.add_object();
         description_object.add("fd", i);
         description_object.add("absolute_path", description->absolute_path());
         description_object.add("seekable", description->file().is_seekable());
         description_object.add("class", description->file().class_name());
         description_object.add("offset", description->offset());
+        description_object.add("cloexec", cloexec);
+        description_object.add("blocking", description->is_blocking());
     }
     array.finish();
     return builder.build();
diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index 5921ebd6792..f4cbdbc3af4 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -917,6 +917,15 @@ const FileDescription* Process::file_description(int fd) const
     return nullptr;
 }
 
+int Process::fd_flags(int fd) const
+{
+    if (fd < 0)
+        return -1;
+    if (fd < m_fds.size())
+        return m_fds[fd].flags;
+    return -1;
+}
+
 ssize_t Process::sys$get_dir_entries(int fd, void* buffer, ssize_t size)
 {
     if (size < 0)
diff --git a/Kernel/Process.h b/Kernel/Process.h
index b4760ff6674..52c20ae9e37 100644
--- a/Kernel/Process.h
+++ b/Kernel/Process.h
@@ -95,6 +95,7 @@ public:
 
     FileDescription* file_description(int fd);
     const FileDescription* file_description(int fd) const;
+    int fd_flags(int fd) const;
 
     template<typename Callback>
     static void for_each(Callback);