/* Author: Peter Vrabec <pvrabec@redhat.com> */

#include <config.h>
#ifdef USE_NSCD

/* because of TEMP_FAILURE_RETRY */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <features.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <spawn.h>
#include <errno.h>
#include <sys/wait.h>
#include <sys/types.h>
#include "defines.h"
#include "nscd.h"

#define MSG_NSCD_FLUSH_CACHE_FAILED "Failed to flush the nscd cache.\n"

/*
 * nscd_flush_cache - flush specified service buffer in nscd cache
 */
int nscd_flush_cache (const char *service)
{
	pid_t pid, termpid;
	int err, status;
	char *spawnedArgs[] = {"/usr/sbin/nscd", "nscd", "-i", service, NULL};
	char *spawnedEnv[] = {NULL};

	/* spawn process */
	err = posix_spawn (&pid, spawnedArgs[0], NULL, NULL,
	                   spawnedArgs, spawnedEnv);
	if(0 != err)
	{
		(void) fputs (_(MSG_NSCD_FLUSH_CACHE_FAILED), stderr);
		(void) fprintf (stderr, "posix_spawn() error=%d\n", err);
		return -1;
	}

	/* Wait for the spawned process to exit */
	termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
	if (-1 == termpid)
	{
		(void) fputs (_(MSG_NSCD_FLUSH_CACHE_FAILED), stderr);
		perror("waitpid");
		return -1;
	}
	else if (termpid != pid)
	{
		(void) fputs (_(MSG_NSCD_FLUSH_CACHE_FAILED), stderr);
		(void) fprintf (stderr, "waitpid returned %ld != %ld\n",
		               (long int) termpid, (long int) pid);
		return -1;
	}

	return 0;
}
#else				/* USE_NSCD */
extern int errno;		/* warning: ANSI C forbids an empty source file */
#endif				/* USE_NSCD */