ccan/io: save errno on io_close, for finish functions.

[ccan] / ccan / io / test / run-18-errno.c

diff --git a/ccan/io/test/run-18-errno.c b/ccan/io/test/run-18-errno.c
new file mode 100644 (file)
index 0000000..985a322
--- /dev/null
+++ b/ccan/io/test/run-18-errno.c
@@ -0,0 +1,120 @@
+#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>
+
+#ifndef PORT
+#define PORT "65018"
+#endif
+
+static void finish_100(struct io_conn *conn, int *state)
+{
+       ok1(errno == 100);
+       ok1(*state == 1);
+       (*state)++;
+}
+
+static void finish_EBADF(struct io_conn *conn, int *state)
+{
+       ok1(errno == EBADF);
+       ok1(*state == 3);
+       (*state)++;
+       io_break(state + 1, io_close());
+}
+
+static void init_conn(int fd, int *state)
+{
+       if (*state == 0) {
+               (*state)++;
+               errno = 100;
+               io_set_finish(io_new_conn(fd, io_close()), finish_100, state);
+       } else {
+               ok1(*state == 2);
+               (*state)++;
+               close(fd);
+               errno = 0;
+               io_set_finish(io_new_conn(fd, io_read(state, 0,
+                                                     io_close_cb, NULL)),
+                             finish_EBADF, state);
+       }
+}
+
+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)
+{
+       int state = 0;
+       struct addrinfo *addrinfo;
+       struct io_listener *l;
+       int fd;
+
+       /* This is how many tests you plan to run */
+       plan_tests(12);
+       fd = make_listen_fd(PORT, &addrinfo);
+       ok1(fd >= 0);
+       l = io_new_listener(fd, init_conn, &state);
+       ok1(l);
+       fflush(stdout);
+       if (!fork()) {
+               io_close_listener(l);
+               fd = socket(addrinfo->ai_family, addrinfo->ai_socktype,
+                           addrinfo->ai_protocol);
+               if (fd < 0)
+                       exit(1);
+               if (connect(fd, addrinfo->ai_addr, addrinfo->ai_addrlen) != 0)
+                       exit(2);
+               close(fd);
+               fd = socket(addrinfo->ai_family, addrinfo->ai_socktype,
+                           addrinfo->ai_protocol);
+               if (fd < 0)
+                       exit(3);
+               if (connect(fd, addrinfo->ai_addr, addrinfo->ai_addrlen) != 0)
+                       exit(4);
+               close(fd);
+               freeaddrinfo(addrinfo);
+               exit(0);
+       }
+       freeaddrinfo(addrinfo);
+       ok1(io_loop() == &state + 1);
+       ok1(state == 4);
+       io_close_listener(l);
+       ok1(wait(&state));
+       ok1(WIFEXITED(state));
+       ok1(WEXITSTATUS(state) == 0);
+
+       /* This exits depending on whether all tests passed */
+       return exit_status();
+}