WIP: test/aio: very simplistic AIO test

Issue genodelabs#5302

repos/libports/run/aio.run

@@ -0,0 +1,41 @@
+build { core init timer lib/ld lib/libc lib/libm lib/vfs lib/posix test/aio }
+
+create_boot_directory
+
+install_config {
+<config>
+	<parent-provides>
+		<service name="ROM"/>
+		<service name="IRQ"/>
+		<service name="IO_MEM"/>
+		<service name="IO_PORT"/>
+		<service name="PD"/>
+		<service name="RM"/>
+		<service name="CPU"/>
+		<service name="LOG"/>
+	</parent-provides>
+	<default-route>
+		<any-service> <parent/> <any-child/> </any-service>
+	</default-route>
+	<default caps="200"/>
+	<start name="timer">
+		<resource name="RAM" quantum="1M"/>
+		<provides> <service name="Timer"/> </provides>
+	</start>
+	<start name="test-aio">
+		<resource name="RAM" quantum="400M"/>
+		<config>
+			<vfs> <dir name="dev"> <log/> <inline name="rtc">2019-08-20 15:01</inline> </dir> </vfs>
+			<libc stdout="/dev/log" stderr="/dev/log" rtc="/dev/rtc"/>
+			<arg value="test-aio"/>
+			<arg value="/dev/log"/>
+		</config>
+	</start>
+</config>
+}
+
+build_boot_image [build_artifacts]
+
+append qemu_args " -nographic  "
+
+run_genode_until "child .* exited with exit value 0.*\n" 30

repos/libports/src/test/aio/aio.c

@@ -0,0 +1,109 @@
+/*
+ * \brief  AIO test
+ * \author Benjamin Lamowski
+ * \date   2031-07-31
+ */
+#include <aio.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/event.h>
+
+int
+main(int	argc, char **argv)
+{
+   struct kevent tevent;   /* Event triggered */
+   int kq, write_fd, read_fd, ret;
+
+   if (argc != 2)
+       err(EXIT_FAILURE, "Usage: %s path\n", argv[0]);
+   write_fd = open(argv[1], O_WRONLY);
+   if (write_fd == -1)
+       err(EXIT_FAILURE, "Failed to open '%s'",	argv[1]);
+
+   /* Create kqueue. */
+   kq =	kqueue();
+   if (kq == -1)
+       err(EXIT_FAILURE, "kqueue() failed");
+
+   /*
+    * write test
+    */
+   char * write_string = "Hello log\n";
+
+   struct aiocb write_cb;
+   write_cb.aio_fildes = write_fd;
+   write_cb.aio_buf = write_string;
+   write_cb.aio_nbytes = strlen(write_string) + 1;
+   write_cb.aio_offset = 0;
+   write_cb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
+   write_cb.aio_sigevent.sigev_notify_kqueue = kq;
+   write_cb.aio_sigevent.sigev_notify_kevent_flags = 0;
+
+
+   aio_write(&write_cb);
+
+   while (aio_error(&write_cb) == EINPROGRESS)
+   {
+       sleep(1);
+       puts(">>> progressing write...");
+   }
+
+   printf(">>> Aio write error is: %i\n", aio_error(&write_cb));
+
+   if (aio_error(&write_cb) == 0)
+       printf("Aio write retval: %li\n", aio_return(&write_cb));
+
+   read_fd = open("/dev/rtc", O_RDONLY);
+   if (read_fd == -1)
+       err(EXIT_FAILURE, "Failed to open '%s'",	argv[1]);
+
+
+   /*
+    * Read test
+    */
+   struct aiocb read_cb;
+
+   char buf[10];
+   read_cb.aio_fildes =read_fd;
+   read_cb.aio_buf = buf;
+   read_cb.aio_nbytes = sizeof(buf);
+   read_cb.aio_offset = 0;
+   read_cb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
+   read_cb.aio_sigevent.sigev_notify_kqueue = kq;
+   read_cb.aio_sigevent.sigev_notify_kevent_flags = 0;
+
+   aio_read(&read_cb);
+
+   while (aio_error(&read_cb) == EINPROGRESS)
+   {
+       sleep(1);
+       puts(">>> progressing read...");
+   }
+
+   printf(">>> Aio read error is: %i\n", aio_error(&read_cb));
+
+   if (aio_error(&read_cb) == 0)
+       printf("Aio read retval: %li\n", aio_return(&read_cb));
+
+   for (int i = 0; i < 2 ; i++) {
+       /* Sleep until something happens. */
+       ret = kevent(kq,	NULL, 0, &tevent, 1, NULL);
+       if (ret == -1) {
+	   err(EXIT_FAILURE, "kevent wait");
+       } else if (ret >	0) {
+	   if (tevent.flags & EV_ERROR)
+	       errx(EXIT_FAILURE, "Event error.\n");
+	   else
+	       printf("Got AIO event for %i'\n", tevent.ident);
+       }
+   }
+
+   /* kqueues are destroyed upon close() */
+   (void)close(kq);
+   (void)close(write_fd);
+}

repos/libports/src/test/aio/target.mk

@@ -0,0 +1,8 @@
+include $(REP_DIR)/lib/mk/libc-common.inc
+
+TARGET   = test-aio
+SRC_C    = aio.c
+LIBS     = posix libc
+CC_OPT  += -I$(LIBC_DIR)/sys/sys
+
+CC_CXX_WARN_STRICT =