io: handle errors on listening file descriptors.

[ccan] / ccan / io / test / run-22-POLLHUP-on-listening-socket.c

diff --git a/ccan/io/test/run-22-POLLHUP-on-listening-socket.c b/ccan/io/test/run-22-POLLHUP-on-listening-socket.c
new file mode 100644 (file)
index 0000000..e3b6c41
--- /dev/null
+++ b/ccan/io/test/run-22-POLLHUP-on-listening-socket.c
@@ -0,0 +1,61 @@
+#include <ccan/io/io.h>
+/* Include the C files directly. */
+#include <ccan/io/poll.c>
+#include <ccan/io/io.c>
+#include <ccan/tap/tap.h>
+#include <sys/wait.h>
+#include <stdio.h>
+
+#define PORT "65022"
+
+static int make_listen_fd(const char *port, struct addrinfo **info)
+{
+       int fd, on = 1;
+       struct addrinfo *addrinfo, hints;
+
+       memset(&hints, 0, sizeof(hints));
+       hints.ai_family = AF_UNSPEC;
+       hints.ai_socktype = SOCK_STREAM;
+       hints.ai_flags = AI_PASSIVE;
+       hints.ai_protocol = 0;
+
+       if (getaddrinfo(NULL, port, &hints, &addrinfo) != 0)
+               return -1;
+
+       fd = socket(addrinfo->ai_family, addrinfo->ai_socktype,
+                   addrinfo->ai_protocol);
+       if (fd < 0)
+               return -1;
+
+       setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+       if (bind(fd, addrinfo->ai_addr, addrinfo->ai_addrlen) != 0) {
+               close(fd);
+               return -1;
+       }
+       if (listen(fd, 1) != 0) {
+               close(fd);
+               return -1;
+       }
+       *info = addrinfo;
+       return fd;
+}
+
+int main(void)
+{
+       struct addrinfo *addrinfo = NULL;
+       int fd;
+
+       /* This is how many tests you plan to run */
+       plan_tests(1);
+       fd = make_listen_fd(PORT, &addrinfo);
+       freeaddrinfo(addrinfo);
+       io_new_listener(NULL, fd, io_never, NULL);
+
+       /* Anyone could do this; a child doing it will cause poll to return
+        * POLLHUP only! */
+       shutdown(fd, SHUT_RDWR);
+       ok1(io_loop(NULL, NULL) == NULL);
+
+       /* This exits depending on whether all tests passed */
+       return exit_status();
+}