1 files changed, 85 insertions, 0 deletions
diff --git a/ctdb/common/pidfile.c b/ctdb/common/pidfile.c
new file mode 100644
index 0000000..47589f4
--- /dev/null
+++ b/ctdb/common/pidfile.c
@@ -0,0 +1,85 @@
+/*
+   Create and remove pidfile
+
+   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/filesys.h"
+
+#include <talloc.h>
+
+#include "lib/util/blocking.h"
+#include "lib/util/pidfile.h"
+
+#include "common/pidfile.h"
+
+struct pidfile_context {
+	const char *pidfile;
+	int fd;
+	pid_t pid;
+};
+
+static int pidfile_context_destructor(struct pidfile_context *pid_ctx);
+
+int pidfile_context_create(TALLOC_CTX *mem_ctx, const char *pidfile,
+			   struct pidfile_context **result)
+{
+	struct pidfile_context *pid_ctx;
+	int fd, ret = 0;
+
+	pid_ctx = talloc_zero(mem_ctx, struct pidfile_context);
+	if (pid_ctx == NULL) {
+		return ENOMEM;
+	}
+
+	pid_ctx->pidfile = talloc_strdup(pid_ctx, pidfile);
+	if (pid_ctx->pidfile == NULL) {
+		ret = ENOMEM;
+		goto fail;
+	}
+
+	pid_ctx->pid = getpid();
+
+	ret = pidfile_path_create(pid_ctx->pidfile, &fd, NULL);
+	if (ret != 0) {
+		return ret;
+	}
+
+	pid_ctx->fd = fd;
+
+	talloc_set_destructor(pid_ctx, pidfile_context_destructor);
+
+	*result = pid_ctx;
+	return 0;
+
+fail:
+	talloc_free(pid_ctx);
+	return ret;
+}
+
+static int pidfile_context_destructor(struct pidfile_context *pid_ctx)
+{
+	if (getpid() != pid_ctx->pid) {
+		return 0;
+	}
+
+	(void) unlink(pid_ctx->pidfile);
+
+	pidfile_fd_close(pid_ctx->fd);
+
+	return 0;
+}