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/*
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;
}
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