0.3.0: converge relibc to upstream 0.6.0 + Red Bear patches

tests/sys_socket/unixrecv.c

@@ -0,0 +1,65 @@
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/wait.h>
+
+#include "test_helpers.h"
+
+int main(void)
+{
+    int status;
+    const char* socket_path = "unix_stream.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);
+
+    status = bind(server_fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un));
+    ERROR_IF(bind, status, == -1);
+
+    status = listen(server_fd, 5);
+    ERROR_IF(listen, status, == -1);
+
+    pid_t pid = fork();
+    ERROR_IF(fork, pid, == -1);
+
+    if (pid == 0) {
+        // to test that blocking in accept() works
+        usleep(500000);
+
+        int client_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+        ERROR_IF(socket, client_fd, == -1);
+
+        status = connect(client_fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un));
+        ERROR_IF(connect, status, == -1);
+
+        char *msg = "ipsum";
+        printf("send %s\n", msg);
+        status = send(client_fd, msg, 6, 0);
+        ERROR_IF(send, status, == -1);
+
+        close(client_fd);
+        return 0;
+    } else {
+        int accepted_fd = accept(server_fd, NULL, NULL);
+        ERROR_IF(accept, accepted_fd, == -1);
+
+        char x[6];
+        ssize_t amount = recv(accepted_fd, x, 6, 0);
+        ERROR_IF(recv, amount, == -1);
+
+        printf("recv %s\n", x);
+        close(accepted_fd);
+        close(server_fd);
+        
+        wait(NULL);
+        unlink(socket_path);
+    }
+
+    return 0;
+}