From 48f5f6ea3396a09bd026a51be8df9beba83131b6 Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Thu, 27 Jul 2023 16:35:27 +0200
Subject: [PATCH] kernel+libc+libos: Add inode type for sockets

---
 kernel/src/fs/VFS.h       | 1 +
 kernel/src/sys/open.cpp   | 2 ++
 kernel/src/sys/stat.cpp   | 1 +
 libc/include/bits/modes.h | 2 ++
 libos/src/Mode.cpp        | 1 +
 5 files changed, 7 insertions(+)

diff --git a/kernel/src/fs/VFS.h b/kernel/src/fs/VFS.h
index f89eaa4d..ac014cd8 100644
--- a/kernel/src/fs/VFS.h
+++ b/kernel/src/fs/VFS.h
@@ -17,6 +17,7 @@ namespace VFS
         BlockDevice,
         Symlink,
         FIFO,
+        Socket,
     };
 
     class Inode;
diff --git a/kernel/src/sys/open.cpp b/kernel/src/sys/open.cpp
index ce160a19..0a3de817 100644
--- a/kernel/src/sys/open.cpp
+++ b/kernel/src/sys/open.cpp
@@ -55,6 +55,8 @@ Result<u64> sys_openat(Registers*, SyscallArgs args)
     // This should only be possible if O_NOFOLLOW was in flags.
     if (inode->type() == VFS::InodeType::Symlink) return err(ELOOP);
 
+    if (inode->type() == VFS::InodeType::Socket) return err(ENXIO);
+
     if (flags & O_TMPFILE)
     {
         if (inode->type() != VFS::InodeType::Directory) return err(EINVAL);
diff --git a/kernel/src/sys/stat.cpp b/kernel/src/sys/stat.cpp
index 85c534cd..55e35699 100644
--- a/kernel/src/sys/stat.cpp
+++ b/kernel/src/sys/stat.cpp
@@ -18,6 +18,7 @@ static mode_t make_mode(mode_t mode, VFS::InodeType type)
     case VFS::InodeType::BlockDevice: result |= S_IFBLK; break;
     case VFS::InodeType::Symlink: result |= S_IFLNK; break;
     case VFS::InodeType::FIFO: result |= S_IFIFO; break;
+    case VFS::InodeType::Socket: result |= S_IFSOCK; break;
     default: break;
     }
 
diff --git a/libc/include/bits/modes.h b/libc/include/bits/modes.h
index 6f567339..b46df7c2 100644
--- a/libc/include/bits/modes.h
+++ b/libc/include/bits/modes.h
@@ -10,6 +10,7 @@
 #define S_IFBLK 030000
 #define S_IFDIR 040000
 #define S_IFCHR 050000
+#define S_IFSOCK 060000
 
 #define __CHECK_TYPE(mode, type) (((mode)&S_IFMT) == type)
 
@@ -19,6 +20,7 @@
 #define S_ISBLK(mode) __CHECK_TYPE(mode, S_IFBLK)
 #define S_ISLNK(mode) __CHECK_TYPE(mode, S_IFLNK)
 #define S_ISFIFO(mode) __CHECK_TYPE(mode, S_IFIFO)
+#define S_ISSOCK(mode) __CHECK_TYPE(mode, S_IFSOCK)
 
 #define S_IRWXU 0700
 #define S_IRUSR 0400
diff --git a/libos/src/Mode.cpp b/libos/src/Mode.cpp
index 2c6e6cbb..1b3d3c86 100644
--- a/libos/src/Mode.cpp
+++ b/libos/src/Mode.cpp
@@ -21,6 +21,7 @@ namespace os
         if (S_ISBLK(mode)) return 'b';
         if (S_ISLNK(mode)) return 'l';
         if (S_ISFIFO(mode)) return 'p';
+        if (S_ISSOCK(mode)) return 's';
 
         return '?';
     }