Relocate tests/ -> test/

For my own sanity, test/ is used in every other project of mine.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/signal.c

@@ -0,0 +1,149 @@
+/* Multiple signals, segfault and fork() to test sub-processes.
+ *
+ * Copyright (c) 2015-2021  Joachim Wiberg <troglobit@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "check.h"
+#include <err.h>
+#include <sched.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/user.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#define DO_SEGFAULT 1
+
+typedef struct {
+	pid_t pid;
+	int magic;
+	void *ptr;
+} arg_t;
+
+/* Stack is not shared between parent and child, only the heap. */
+static arg_t arg = {
+	.magic = 1337,
+	.ptr = NULL
+};
+
+static int callback(arg_t *arg, int event, void *foo)
+{
+	arg_t *event_arg = (arg_t *)foo;
+
+	printf("child[%d] magic %d ptr %p, event %d event arg %p\n",
+	       getpid(), arg->magic, arg->ptr, event, event_arg);
+
+	arg->magic = 7331;
+	arg->ptr   = &event_arg;
+
+	/* Cause segfault! */
+#if DO_SEGFAULT == 1
+	event_arg->ptr = arg->ptr;
+	printf("child: segfaulting failed!\n");
+#endif
+
+	return 42;
+}
+
+static void sig_cb(uev_t *w, void *cbarg, int events)
+{
+	arg_t *arg = (arg_t *)cbarg;
+
+	switch (w->signo) {
+	case SIGSEGV:
+//		printf("Got SIGSEGV (%d) from PID %d\n", w->siginfo.ssi_signo, w->siginfo.ssi_pid);
+		warnx("PID %d caused segfault.", getpid());
+		exit(-1);
+		break;
+
+	case SIGCHLD:
+		if (arg->pid != w->siginfo.ssi_pid)
+			err(1, "wrong child exited pid %d vs ssi_pid %d",
+			    arg->pid, w->siginfo.ssi_pid);
+
+		warnx("Got SIGCHLD (%d), PID %d exited, bye.", w->siginfo.ssi_signo, arg->pid);
+		break;
+
+	default:
+		err(1, "unhandled signal %d", w->siginfo.ssi_signo);
+	}
+}
+
+static void work_cb(uev_t *w, void *cbarg, int events)
+{
+	arg_t *arg = (arg_t *)cbarg;
+	pid_t pid;
+	int rc = 0;
+
+	pid = fork();
+	if (-1 == pid)
+		err(1, "fork");
+	if (!pid)
+		exit(callback(arg, 6137, NULL));
+
+	arg->pid = pid;
+	pid = waitpid(pid, &rc, 0);
+	if (pid == -1)
+		err(1, "waitpid");
+
+	if (WIFEXITED(rc))
+		printf("Child %d exited normally => %d\n", pid, WEXITSTATUS(rc));
+	else if (WCOREDUMP(rc))
+		printf("Child %d crashed%s\n", pid, DO_SEGFAULT
+		       ? ", as expected, everything is OK."
+		       : ".  This should not happen!");
+	else
+		printf("Child %d did not exit normally!\n", pid);
+}
+
+static void exit_cb(uev_t *w, void *arg, int events)
+{
+	printf("Process deadline reached, exiting!\n");
+	uev_exit(w->ctx);
+}
+
+int main(void)
+{
+	uev_t deadline, sigsegv, sigchld, timeout;
+	uev_ctx_t ctx;
+
+	/* Initialize libuEv */
+	uev_init(&ctx);
+
+	/* Setup callbacks */
+	uev_signal_init(&ctx, &sigsegv, sig_cb, NULL, SIGSEGV);
+	uev_signal_init(&ctx, &sigchld, sig_cb, &arg, SIGCHLD);
+	uev_timer_init(&ctx, &timeout, work_cb, &arg, 400, 0);
+	uev_timer_init(&ctx, &deadline, exit_cb, NULL, 1000, 0);
+
+	/* Start event loop */
+	return uev_run(&ctx, 0);
+}
+
+/**
+ * Local Variables:
+ *  indent-tabs-mode: t
+ *  c-file-style: "linux"
+ * End:
+ */