From 11dc64a71558948aef16730cb363e7e5da773a5b Mon Sep 17 00:00:00 2001
From: Steffen <steffen.winter@proton.me>
Date: Mon, 13 Feb 2023 17:32:16 +0100
Subject: [PATCH 1/3] Add custom error function for tests.

On musl systems, liburing cannot build examples and tests due to
it's usage of error.h. t_error calls fprintf(stderr, ...) and
exits.

Closes: #786

Signed-off-by: Steffen Winter <steffen.winter@proton.me>
--- a/test/helpers.c
+++ b/test/helpers.c
@@ -8,6 +8,7 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <stdarg.h>
 #include <sys/types.h>
 
 #include <arpa/inet.h>
@@ -300,3 +301,20 @@ unsigned __io_uring_flush_sq(struct io_uring *ring)
 	 */
 	return tail - *sq->khead;
 }
+
+/*
+ * Implementation of error(3), prints an error message and exits.
+ */
+void t_error(int status, int errnum, const char *format, ...)
+{
+	va_list args;
+    	va_start(args, format);
+
+	vfprintf(stderr, format, args);
+    	if (errnum)
+        	fprintf(stderr, ": %s", strerror(errnum));
+
+	fprintf(stderr, "\n");
+	va_end(args);
+    	exit(status);
+}
--- a/test/helpers.h
+++ b/test/helpers.h
@@ -89,6 +89,8 @@ unsigned __io_uring_flush_sq(struct io_uring *ring);
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
+void t_error(int status, int errnum, const char *format, ...);
+
 #ifdef __cplusplus
 }
 #endif

From 3b0b4976d7da2e4616fe860fb7a8e52d88d4523b Mon Sep 17 00:00:00 2001
From: Steffen <steffen.winter@proton.me>
Date: Mon, 13 Feb 2023 17:56:03 +0100
Subject: [PATCH 2/3] test: Use t_error instead of glibc's error.

On musl systems, liburing cannot build examples and tests due to
it's usage of error.h. Replacing calls to error() with t_error().

Closes: #786

Signed-off-by: Steffen Winter <steffen.winter@proton.me>
--- a/test/defer-taskrun.c
+++ b/test/defer-taskrun.c
@@ -4,7 +4,6 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
-#include <error.h>
 #include <sys/eventfd.h>
 #include <signal.h>
 #include <poll.h>
--- a/test/send-zerocopy.c
+++ b/test/send-zerocopy.c
@@ -4,7 +4,6 @@
 #include <stdint.h>
 #include <assert.h>
 #include <errno.h>
-#include <error.h>
 #include <limits.h>
 #include <fcntl.h>
 #include <unistd.h>
--- a/test/single-issuer.c
+++ b/test/single-issuer.c
@@ -5,7 +5,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
-#include <error.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
@@ -56,13 +55,13 @@ static int try_submit(struct io_uring *ring)
 		return ret;
 
 	if (ret != 1)
-		error(1, ret, "submit %i", ret);
+		t_error(1, ret, "submit %i", ret);
 	ret = io_uring_wait_cqe(ring, &cqe);
 	if (ret)
-		error(1, ret, "wait fail %i", ret);
+		t_error(1, ret, "wait fail %i", ret);
 
 	if (cqe->res || cqe->user_data != 42)
-		error(1, ret, "invalid cqe");
+		t_error(1, ret, "invalid cqe");
 
 	io_uring_cqe_seen(ring, cqe);
 	return 0;
@@ -105,7 +104,7 @@ int main(int argc, char *argv[])
 	ret = io_uring_queue_init(8, &ring, IORING_SETUP_SINGLE_ISSUER |
 					    IORING_SETUP_R_DISABLED);
 	if (ret)
-		error(1, ret, "ring init (2) %i", ret);
+		t_error(1, ret, "ring init (2) %i", ret);
 
 	if (!fork_t()) {
 		io_uring_enable_rings(&ring);
@@ -121,7 +120,7 @@ int main(int argc, char *argv[])
 	ret = io_uring_queue_init(8, &ring, IORING_SETUP_SINGLE_ISSUER |
 					    IORING_SETUP_R_DISABLED);
 	if (ret)
-		error(1, ret, "ring init (3) %i", ret);
+		t_error(1, ret, "ring init (3) %i", ret);
 
 	io_uring_enable_rings(&ring);
 	if (!fork_t()) {
@@ -136,7 +135,7 @@ int main(int argc, char *argv[])
 	/* test that anyone can submit to a SQPOLL|SINGLE_ISSUER ring */
 	ret = io_uring_queue_init(8, &ring, IORING_SETUP_SINGLE_ISSUER|IORING_SETUP_SQPOLL);
 	if (ret)
-		error(1, ret, "ring init (4) %i", ret);
+		t_error(1, ret, "ring init (4) %i", ret);
 
 	ret = try_submit(&ring);
 	if (ret) {
@@ -156,7 +155,7 @@ int main(int argc, char *argv[])
 	/* test that IORING_ENTER_REGISTERED_RING doesn't break anything */
 	ret = io_uring_queue_init(8, &ring, IORING_SETUP_SINGLE_ISSUER);
 	if (ret)
-		error(1, ret, "ring init (5) %i", ret);
+		t_error(1, ret, "ring init (5) %i", ret);
 
 	if (!fork_t()) {
 		ret = try_submit(&ring);