mmumount.c

linux下的一个mount工具

/*
 *  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 2 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 Library General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
/*
 * $Id: mmumount.c,v 1.1.1.1 2000/09/13 19:36:51 lyonel Exp $
 *
 */
 
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <unistd.h>
#include <stdio.h>

#include "config.h"
#include "cmds.h"

int mmounter = -1;

int umount(const char * device)
{
	struct my_msgbuf *message;
		
	message = (struct my_msgbuf*)malloc(sizeof(struct my_msgbuf)+strlen(device));
	message->mtype = MMOUNTER_UMOUNT;
	strcpy(message->mtext, device);
	
	return msgsnd(mmounter, (struct msgbuf*)message, sizeof(struct msgbuf)+strlen(device), 0);
}

int main(int argc, const char * * argv)
{	
	char path[MAXPATHLEN+1];
	
	mmounter = msgget(ftok(ETCMMOUNTERCONF, 0), 0);
	
	if(mmounter==-1)
	{
		fprintf(stderr, "could not find a running mmounter\n");
		return 1;
	}
	
	if(argc!=2)
	{
		fprintf(stderr, "usage:\n\t%s special\n",argv[0]);
		return 1;
	}
	
	realpath(argv[1], path);
	return umount(path);
}