#include	"open.h"#include	<sys/uio.h>		/* struct iovec *//* * Open the file by sending the "name" and "oflag" to the * connection server and reading a file descriptor back. */intcsopen(char *name, int oflag){	int				len;	char			buf[10];	struct iovec	iov[3];	static int		csfd = -1;	if (csfd < 0) {		/* open connection to conn server */		if ((csfd = cli_conn(CS_OPEN)) < 0)			err_sys("cli_conn error");	}	sprintf(buf, " %d", oflag);		/* oflag to ascii */	iov[0].iov_base = CL_OPEN " ";	/* string concatenation */	iov[0].iov_len  = strlen(CL_OPEN) + 1;	iov[1].iov_base = name;	iov[1].iov_len  = strlen(name);	iov[2].iov_base = buf;	iov[2].iov_len  = strlen(buf) + 1;	/* null always sent */	len = iov[0].iov_len + iov[1].iov_len + iov[2].iov_len;	if (writev(csfd, &iov[0], 3) != len)		err_sys("writev error");	/* read back descriptor; returned errors handled by write() */	return(recv_fd(csfd, write));}