/* name       : lock.c                                                       */
/* date       : 14-Nov-2001                                                  */
/* Author     : Pentest Limited                                              */
/* Description: This C program locks the passed in segment ID into core.     */
/*              This is used on Solaris to lock the SGA into core to prevent */
/*              the SGA from paging.                                         */
/* limitation : This program is written for Solaris                          */
/*                                                                           */
/* usage      : ipcs -m | grep oracle | awk '{print $2'} | while read x      */
/*              do                                                           */
/*                      lock $x                                              */
/*              done                                                         */

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <errno.h>

main(int argc,char **argv)
{
	int sh;
	int result;

	sh=atol(argv[1]);
	printf("Trying to lock id %d in core\n",sh);
	result=shmctl(sh, SHM_LOCK, (struct shmid_ds *)0);
	if (result==0)
	{
		printf("Segment %d locked in core\n",sh);
	}
	else
	{
		perror("Failed to lock segment %d in core\n",sh);
	}
}