/*
 *  linux/fs/pipe.c
 *
 *  (C) 1991  Linus Torvalds
 */

#include <signal.h>

#include <linux/sched.h>
#include <linux/mm.h>	/* for get_free_page */
#include <asm/segment.h>


int sys_pipe2(unsigned long * fildes,int flag)
{
	struct m_inode * inode;
	struct file * f[2];
	int fd[2];
	int i,j;
	if(flag==0){
		j=0;
		for(i=0;j<2 && i<NR_FILE;i++)
			if (!file_table[i].f_count)
				(f[j++]=i+file_table)->f_count++;
		if (j==1)
			f[0]->f_count=0;
		if (j<2)
			return -1;
		j=0;
		for(i=0;j<2 && i<NR_OPEN;i++)
			if (!current->filp[i]) {
				current->filp[ fd[j]=i ] = f[j];
				j++;
			}
		if (j==1)
			current->filp[fd[0]]=NULL;
		if (j<2) {
			f[0]->f_count=f[1]->f_count=0;
			return -1;
		}
		if (!(inode=get_pipe_inode())) {
			current->filp[fd[0]] =
				current->filp[fd[1]] = NULL;
			f[0]->f_count = f[1]->f_count = 0;
			return -1;
		}
		f[0]->f_inode = f[1]->f_inode = inode;
		f[0]->f_pos = f[1]->f_pos = 0;
		f[0]->f_mode = 1;		/* read */
		f[1]->f_mode = 2;		/* write */
		put_fs_long(fd[0],0+fildes);
		put_fs_long(fd[1],1+fildes);
	}
	return 0;
}