transp.c

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

/*************************************************************
 * File: mon/transp.c
 * Purpose: Part of core Monitor
 * Author: Phil Bunce ([e-mail])
 * Revision History:
 *	970304	Start of revision history
 */

#include <termio.h>
#include <fcntl.h>
#include <mon.h>

#define STDOUT 1

Optdesc tr_opts[] = {
	{"[-2][dev]","transparent mode"},
	{"-2","two-port mode"},
	{"dev","use device dev"},
	{0}};

/*************************************************************
*  transp(ac,av)
*	the 'tr' command 
*/
transp(ac,av)
int ac;
char *av[];
{
int fd,n,i,j,auxA,auxB,twoflg;
jmp_buf intrsave;
char *hostport,buf[80],abortch,*trabort,*auxport,auxportB[10];
struct termio tbuf,consave,hostsave;

trabort = getMonEnv("trabort");
abortch = str2cc(trabort);
if (abortch == 0) {
	printf("tr: error: trabort not set\n");
	return;
	}

auxport = 0;
twoflg = 0;
for (i=1;i<ac;i++) {
	if (av[i][0] == '-') {
		for (j=1;av[i][j];j++) {
			if (av[i][j] == '2') twoflg = 1;
			else {
				printf("%c: unknown option\n",av[i][j]);
				return;
				}
			}
		}
	else {
		if (!auxport) auxport = av[i];
		else {
			printf("%s: unknown option\n",av[i]);
			return;
			}
		}
	}

hostport = getMonEnv("hostport");
if (auxport) {
	if (strequ(auxport,"tty0")) {
		printf("can't use tty0 for transparent mode\n");
		return;
		}
	fd = open(auxport,O_RDWR);
	if (fd == -1) {
		printf("can't open %s\n",auxport);
		return;
		}
	if (twoflg) {
		if (!hostport) {
			printf("hostport not defined\n");
			return;
			}
		auxA = open(hostport,O_RDWR);
		if (auxA == -1) {
			close(fd);
			printf("can't open %s\n",hostport);
			return;
			}
		atob(&n,&auxport[3],10);
		n++;
		sprintf(auxportB,"tty%d",n);
		auxB = open(auxportB,O_RDWR);
		if (auxB == -1) {
			close(fd);
			close(auxA);
			printf("can't open %s\n",auxportB);
			return;
			}
		}
	}
else {
	if (!hostport) {
		printf("hostport not defined\n");
		return;
		}
	if (strequ(hostport,"tty0")) {
		printf("can't use tty0 for transparent mode\n");
		return;
		}
	fd = open(hostport,O_RDWR);
	if (fd == -1) {
		printf("can't open %s\n",hostport);
		return;
		}
	}

printf("Entering transparent mode. %s to abort\n",trabort);

ioctl(fd,TCGETA,&tbuf);
hostsave = tbuf;
tbuf.c_lflag &= ~(ICANON|ECHO|ECHOE);
tbuf.c_iflag &= ~(ICRNL);
tbuf.c_iflag |= IXOFF; /* enable tandem mode */
tbuf.c_oflag &= ~ONLCR;
tbuf.c_cc[4] = 1;
ioctl(fd,TCSETAF,&tbuf);

ioctl(STDIN,TCGETA,&tbuf);
consave = tbuf;
tbuf.c_lflag &= ~(ICANON|ECHO|ECHOE);
tbuf.c_iflag &= ~(ICRNL|IXON);
tbuf.c_oflag &= ~ONLCR;
tbuf.c_cc[4] = 1;
ioctl(STDIN,TCSETAF,&tbuf);

if (twoflg) {
	ioctl(auxA,TCGETA,&tbuf);
	tbuf.c_lflag &= ~(ICANON|ECHO|ECHOE);
	tbuf.c_iflag &= ~(ICRNL);
	tbuf.c_iflag |= IXOFF; /* enable tandem mode */
	tbuf.c_oflag &= ~ONLCR;
	tbuf.c_cc[4] = 1;
	ioctl(auxA,TCSETAF,&tbuf);

	ioctl(auxB,TCGETA,&tbuf);
	tbuf.c_lflag &= ~(ICANON|ECHO|ECHOE);
	tbuf.c_iflag &= ~(ICRNL|IXON);
	tbuf.c_oflag &= ~ONLCR;
	tbuf.c_cc[4] = 1;
	ioctl(auxB,TCSETAF,&tbuf);
	}

#if 0
/* disable INTR char */
ioctl(STDIN,GETINTR,intrsave);
ioctl(STDIN,SETINTR,0);
#endif

for (;;) {
	n = ioctl_fionread(STDIN);
	if (n > 0) {
		n = read(STDIN,buf,n);
		if (strchr(buf,abortch)) break;
#ifdef PMCC
		if (ioctl(fd,TXRDY,0)) write(fd,buf,n);
#endif
		}
	n = ioctl_fionread(fd);
	if (n > 0) {
		n = read(fd,buf,n);
		write(STDOUT,buf,n);
		}
	if (twoflg) {
		n = ioctl_fionread(auxA);
		if (n > 0) {
			n = read(auxA,buf,n);
			write(auxB,buf,n);
			}
		n = ioctl_fionread(auxB);
		if (n > 0) {
			n = read(auxB,buf,n);
			write(auxA,buf,n);
			}
		}
	}
ioctl(STDIN,TCSETAF,&consave);
ioctl(fd,TCSETAF,&hostsave);
#if 0
ioctl(STDIN,SETINTR,intrsave);
#endif
}