Add STDOUT write test

This will fail if we don't support non ->write_iter() fops.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

2 files changed, 80 insertions, 2 deletions

diff --git a/test/Makefile b/test/Makefile
index 2b77dfe..54052a7 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -6,7 +6,7 @@ all_targets += poll poll-cancel ring-leak fsync io_uring_setup io_uring_register
 	       io_uring_enter nop sq-full cq-full 35fa71a030ca-test \
 		917257daa0fe-test b19062a56726-test eeed8b54e0df-test link \
 		send_recvmsg a4c0b3decb33-test 500f9fbadef8-test timeout \
-		sq-space_left
+		sq-space_left stdout
 
 include ../Makefile.quiet
 
@@ -19,7 +19,7 @@ test_srcs := poll.c poll-cancel.c ring-leak.c fsync.c io_uring_setup.c \
 	io_uring_register.c io_uring_enter.c nop.c sq-full.c cq-full.c \
 	35fa71a030ca-test.c 917257daa0fe-test.c b19062a56726-test.c \
 	eeed8b54e0df-test.c link.c send_recvmsg.c a4c0b3decb33-test.c \
-	500f9fbadef8-test.c timeout.c sq-space_left.c
+	500f9fbadef8-test.c timeout.c sq-space_left.c stdout.c
 
 test_objs := $(patsubst %.c,%.ol,$(test_srcs))
 
diff --git a/test/stdout.c b/test/stdout.c
new file mode 100644
index 0000000..7b64c8c
--- /dev/null
+++ b/test/stdout.c
@@ -0,0 +1,78 @@
+/*
+ * Description: check that STDOUT write works
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "liburing.h"
+
+static int test_pipe_io(struct io_uring *ring)
+{
+	struct io_uring_cqe *cqe;
+	struct io_uring_sqe *sqe;
+	struct iovec vecs;
+	int ret;
+
+	vecs.iov_base = "This is a pipe test\n";
+	vecs.iov_len = strlen(vecs.iov_base);
+
+	sqe = io_uring_get_sqe(ring);
+	if (!sqe) {
+		printf("get sqe failed\n");
+		goto err;
+	}
+	io_uring_prep_writev(sqe, STDOUT_FILENO, &vecs, 1, 0);
+
+	ret = io_uring_submit(ring);
+	if (ret < 1) {
+		printf("Submitted only %d\n", ret);
+		goto err;
+	} else if (ret < 0) {
+		printf("sqe submit failed: %d\n", ret);
+		goto err;
+	}
+
+	ret = io_uring_wait_cqe(ring, &cqe);
+	if (ret < 0) {
+		printf("wait completion %d\n", ret);
+		goto err;
+	}
+	if (cqe->res < 0) {
+		printf("STDOUT write error: %s\n", strerror(-cqe->res));
+		goto err;
+	}
+	if (cqe->res != vecs.iov_len) {
+		printf("Got %d write, wanted %d\n", cqe->res, (int)vecs.iov_len);
+		goto err;
+	}
+	io_uring_cqe_seen(ring, cqe);
+
+	return 0;
+err:
+	return 1;
+}
+
+int main(int argc, char *argv[])
+{
+	struct io_uring ring;
+	int ret;
+
+	ret = io_uring_queue_init(8, &ring, 0);
+	if (ret) {
+		printf("ring setup failed\n");
+		return 1;
+
+	}
+
+	ret = test_pipe_io(&ring);
+	if (ret) {
+		printf("test_pipe_io failed\n");
+		return ret;
+	}
+
+	return 0;
+}