Merge branch 'uds-write-test' into 'master'

Add UDS write test

See merge request redox-os/relibc!953

tests/sys_socket/unixsocketpair.c

@@ -10,13 +10,6 @@
 
 #include "test_helpers.h"
 
-volatile sig_atomic_t signal_received = 0;
-
-void handle_sigusr1(int sig) {
-    (void)sig; 
-    signal_received = 1;
-}
-
 int main(void) {
     int sv[2]; 
     pid_t pid;

tests/sys_socket/unixwrite.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "test_helpers.h"
+
+int main() {
+    int status;
+    const char* socket_path = "unix_write.sock";
+    unlink(socket_path);
+
+    int server_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+    ERROR_IF(socket, server_fd, == -1);
+
+    struct sockaddr_un addr = { .sun_family = AF_UNIX };
+    strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
+
+    unlink(socket_path);
+
+    status = bind(server_fd, (struct sockaddr*)&addr, sizeof(addr));
+    ERROR_IF(bind, status, == -1);
+
+    status = listen(server_fd, 1);
+    ERROR_IF(listen, status, == -1);
+
+    int client_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+    ERROR_IF(socket, client_fd, == -1);
+
+    status = connect(client_fd, (struct sockaddr*)&addr, sizeof(addr));
+    ERROR_IF(connect, status, == -1);
+
+    char *msg = "yes";
+    ssize_t ret = write(client_fd, msg, 3);
+    ERROR_IF(write, ret, == -1);
+
+    close(client_fd);
+    close(server_fd);
+    return 0;
+}