Kernel+Userspace: Implement the accept4() system call

Unlike accept() the new accept4() system call lets the caller specify
flags for the newly accepted socket file descriptor, such as
SOCK_CLOEXEC and SOCK_NONBLOCK.

2 files changed, 8 insertions, 1 deletions

diff --git a/Userland/Libraries/LibC/sys/socket.cpp b/Userland/Libraries/LibC/sys/socket.cpp
index 96211141b1..ba9cdd38ec 100644
--- a/Userland/Libraries/LibC/sys/socket.cpp
+++ b/Userland/Libraries/LibC/sys/socket.cpp
@@ -34,7 +34,13 @@ int listen(int sockfd, int backlog)
 
 int accept(int sockfd, sockaddr* addr, socklen_t* addrlen)
 {
-    int rc = syscall(SC_accept, sockfd, addr, addrlen);
+    return accept4(sockfd, addr, addrlen, 0);
+}
+
+int accept4(int sockfd, sockaddr* addr, socklen_t* addrlen, int flags)
+{
+    Syscall::SC_accept4_params params { sockfd, addr, addrlen, flags };
+    int rc = syscall(SC_accept4, &params);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
diff --git a/Userland/Libraries/LibC/sys/socket.h b/Userland/Libraries/LibC/sys/socket.h
index 44b673546d..0ff9aaff14 100644
--- a/Userland/Libraries/LibC/sys/socket.h
+++ b/Userland/Libraries/LibC/sys/socket.h
@@ -127,6 +127,7 @@ int socket(int domain, int type, int protocol);
 int bind(int sockfd, const struct sockaddr* addr, socklen_t);
 int listen(int sockfd, int backlog);
 int accept(int sockfd, struct sockaddr*, socklen_t*);
+int accept4(int sockfd, struct sockaddr*, socklen_t*, int);
 int connect(int sockfd, const struct sockaddr*, socklen_t);
 int shutdown(int sockfd, int how);
 ssize_t send(int sockfd, const void*, size_t, int flags);