user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/sysdeps/lemon/generic/sockets.cpp

@@ -0,0 +1,132 @@
+#include <lemon/syscall.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include <mlibc/all-sysdeps.hpp>
+
+namespace {
+
+int fcntl_helper(int fd, int request, int *result, ...) {
+	va_list args;
+	va_start(args, result);
+	if(!mlibc::sys_fcntl) {
+		return ENOSYS;
+	}
+	int ret = mlibc::sys_fcntl(fd, request, args, result);
+	va_end(args);
+	return ret;
+}
+
+}
+
+namespace mlibc{
+
+int sys_socket(int domain, int type, int protocol, int *fd){
+    long ret = syscall(SYS_SOCKET, domain, type, protocol);
+
+    if(ret < 0){
+        return -ret;
+    }
+
+    *fd = ret;
+
+    return 0;
+}
+
+int sys_bind(int sockfd, const struct sockaddr *addr_ptr, socklen_t addrlen){
+    return syscall(SYS_BIND, sockfd, addr_ptr, addrlen);
+}
+
+int sys_connect(int sockfd, const struct sockaddr *addr_ptr, socklen_t addrlen){
+    return syscall(SYS_CONNECT, sockfd, addr_ptr, addrlen);
+}
+
+int sys_accept(int fd, int *newfd, struct sockaddr *addr_ptr, socklen_t *addr_length, int flags){
+    long ret = syscall(SYS_ACCEPT, fd);
+
+    if(ret < 0){
+        return -ret;
+    }
+
+    *newfd = ret;
+
+	if(flags & SOCK_NONBLOCK) {
+		int fcntl_ret = 0;
+		fcntl_helper(*newfd, F_GETFL, &fcntl_ret);
+		fcntl_helper(*newfd, F_SETFL, &fcntl_ret, fcntl_ret | O_NONBLOCK);
+	}
+
+	if(flags & SOCK_CLOEXEC) {
+		int fcntl_ret = 0;
+		fcntl_helper(*newfd, F_GETFD, &fcntl_ret);
+		fcntl_helper(*newfd, F_SETFD, &fcntl_ret, fcntl_ret | FD_CLOEXEC);
+	}
+
+    return 0;
+}
+
+int sys_listen(int fd, int backlog){
+    return syscall(SYS_LISTEN, fd, backlog);
+}
+
+int sys_msg_recv(int sockfd, struct msghdr *hdr, int flags, ssize_t *length){
+    long ret = syscall(SYS_RECVMSG, sockfd, hdr, flags);
+
+    if(ret < 0){
+        return -ret;
+    }
+
+    *length = ret;
+
+    return 0;
+}
+
+int sys_msg_send(int sockfd, const struct msghdr *hdr, int flags, ssize_t *length){
+    long ret = syscall(SYS_SENDMSG, sockfd, hdr, flags);
+
+    if(ret < 0){
+        return -ret;
+    }
+
+    *length = ret;
+
+    return 0;
+}
+
+int sys_setsockopt(int fd, int layer, int number, const void *buffer, socklen_t size){
+    long ret = syscall(SYS_SET_SOCKET_OPTIONS, fd, layer, number, buffer, size);
+
+    if(ret < 0){
+        return -ret;
+    }
+
+    return 0;
+}
+
+int sys_getsockopt(int fd, int layer, int number, void *__restrict buffer, socklen_t *__restrict size){
+    long ret = syscall(SYS_GET_SOCKET_OPTIONS, fd, layer, number, buffer, size);
+
+    if(ret < 0){
+        return -ret;
+    }
+
+    return 0;
+}
+
+int sys_socketpair(int domain, int type_and_flags, int proto, int *fds){
+    return -syscall(SYS_SOCKETPAIR, domain, type_and_flags, proto, fds);
+}
+
+int sys_sockname(int fd, struct sockaddr *addr_ptr, socklen_t max_addr_length,
+    socklen_t *actual_length) {
+    return -syscall(SYS_SOCKNAME, fd, addr_ptr, max_addr_length);
+}
+
+int sys_peername(int fd, struct sockaddr *addr_ptr, socklen_t max_addr_length,
+    socklen_t *actual_length) {
+    return -syscall(SYS_PEERNAME, fd, addr_ptr, max_addr_length);
+}
+
+}