1 files changed, 242 insertions, 0 deletions
diff --git a/ctdb/tests/src/pidfile_test.c b/ctdb/tests/src/pidfile_test.c
new file mode 100644
index 0000000..592fc2b
--- /dev/null
+++ b/ctdb/tests/src/pidfile_test.c
@@ -0,0 +1,242 @@
+/*
+   pidfile tests
+
+   Copyright (C) Amitay Isaacs  2016
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/wait.h"
+
+#include <assert.h>
+
+#include "common/pidfile.c"
+
+
+/* create pid file, check pid file exists, check pid and remove pid file */
+static void test1(const char *pidfile)
+{
+	struct pidfile_context *pid_ctx;
+	int ret;
+	struct stat st;
+	FILE *fp;
+	pid_t pid;
+
+	ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+	assert(ret == 0);
+	assert(pid_ctx != NULL);
+
+	ret = stat(pidfile, &st);
+	assert(ret == 0);
+	assert(S_ISREG(st.st_mode));
+
+	fp = fopen(pidfile, "r");
+	assert(fp != NULL);
+	ret = fscanf(fp, "%d", &pid);
+	assert(ret == 1);
+	assert(pid == getpid());
+	fclose(fp);
+
+	TALLOC_FREE(pid_ctx);
+
+	ret = stat(pidfile, &st);
+	assert(ret == -1);
+}
+
+/* create pid file in two processes */
+static void test2(const char *pidfile)
+{
+	struct pidfile_context *pid_ctx;
+	pid_t pid, pid2;
+	int fd[2];
+	int ret;
+	size_t nread;
+	FILE *fp;
+	struct stat st;
+
+	ret = pipe(fd);
+	assert(ret == 0);
+
+	pid = fork();
+	assert(pid != -1);
+
+	if (pid == 0) {
+		ssize_t nwritten;
+
+		close(fd[0]);
+
+		ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+		assert(ret == 0);
+		assert(pid_ctx != NULL);
+
+		nwritten = write(fd[1], &ret, sizeof(ret));
+		assert(nwritten == sizeof(ret));
+
+		sleep(10);
+
+		TALLOC_FREE(pid_ctx);
+
+		nwritten = write(fd[1], &ret, sizeof(ret));
+		assert(nwritten == sizeof(ret));
+
+		exit(1);
+	}
+
+	close(fd[1]);
+
+	nread = read(fd[0], &ret, sizeof(ret));
+	assert(nread == sizeof(ret));
+	assert(ret == 0);
+
+	fp = fopen(pidfile, "r");
+	assert(fp != NULL);
+	ret = fscanf(fp, "%d", &pid2);
+	assert(ret == 1);
+	assert(pid == pid2);
+	fclose(fp);
+
+	ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+	assert(ret != 0);
+
+	nread = read(fd[0], &ret, sizeof(ret));
+	assert(nread == sizeof(ret));
+	assert(ret == 0);
+
+	ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+	assert(ret == 0);
+	assert(pid_ctx != NULL);
+
+	TALLOC_FREE(pid_ctx);
+
+	ret = stat(pidfile, &st);
+	assert(ret == -1);
+}
+
+/* create pid file, fork, try to remove pid file in separate process */
+static void test3(const char *pidfile)
+{
+	struct pidfile_context *pid_ctx;
+	pid_t pid;
+	int fd[2];
+	int ret;
+	size_t nread;
+	struct stat st;
+
+	ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+	assert(ret == 0);
+	assert(pid_ctx != NULL);
+
+	ret = pipe(fd);
+	assert(ret == 0);
+
+	pid = fork();
+	assert(pid != -1);
+
+	if (pid == 0) {
+		ssize_t nwritten;
+
+		close(fd[0]);
+
+		TALLOC_FREE(pid_ctx);
+
+		nwritten = write(fd[1], &ret, sizeof(ret));
+		assert(nwritten == sizeof(ret));
+
+		exit(1);
+	}
+
+	close(fd[1]);
+
+	nread = read(fd[0], &ret, sizeof(ret));
+	assert(nread == sizeof(ret));
+
+	ret = stat(pidfile, &st);
+	assert(ret == 0);
+
+	TALLOC_FREE(pid_ctx);
+
+	ret = stat(pidfile, &st);
+	assert(ret == -1);
+}
+
+/* create pid file, kill process, overwrite pid file in different process */
+static void test4(const char *pidfile)
+{
+	struct pidfile_context *pid_ctx;
+	pid_t pid, pid2;
+	int fd[2];
+	int ret;
+	size_t nread;
+	struct stat st;
+
+	ret = pipe(fd);
+	assert(ret == 0);
+
+	pid = fork();
+	assert(pid != -1);
+
+	if (pid == 0) {
+		ssize_t nwritten;
+
+		close(fd[0]);
+
+		ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+
+		nwritten = write(fd[1], &ret, sizeof(ret));
+		assert(nwritten == sizeof(ret));
+
+		sleep(99);
+		exit(1);
+	}
+
+	close(fd[1]);
+
+	nread = read(fd[0], &ret, sizeof(ret));
+	assert(nread == sizeof(ret));
+	assert(ret == 0);
+
+	ret = stat(pidfile, &st);
+	assert(ret == 0);
+
+	ret = kill(pid, SIGKILL);
+	assert(ret == 0);
+
+	pid2 = waitpid(pid, &ret, 0);
+	assert(pid2 == pid);
+
+	ret = pidfile_context_create(NULL, pidfile, &pid_ctx);
+	assert(ret == 0);
+	assert(pid_ctx != NULL);
+
+	ret = stat(pidfile, &st);
+	assert(ret == 0);
+
+	TALLOC_FREE(pid_ctx);
+}
+
+int main(int argc, const char **argv)
+{
+	if (argc != 2) {
+		fprintf(stderr, "Usage: %s <pidfile>\n", argv[0]);
+		exit(1);
+	}
+
+	test1(argv[1]);
+	test2(argv[1]);
+	test3(argv[1]);
+	test4(argv[1]);
+
+	return 0;
+}