/* vi: set sw=4 ts=4: */
/*-------------------------------------------------------------------------
* Filename: xmodem.c
- * Version: $Id: rx.c,v 1.2 2004/03/15 08:28:46 andersen Exp $
* Copyright: Copyright (C) 2001, Hewlett-Packard Company
* Author: Christopher Hoover <ch@hpl.hp.com>
* Description: xmodem functionality for uploading of kernels
*
*/
-#include <stdlib.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-#include <termios.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <string.h>
-#include "busybox.h"
-
+#include "libbb.h"
#define SOH 0x01
#define STX 0x02
#define EOT 0x04
#define ACK 0x06
#define NAK 0x15
-#define CAN 0x18
#define BS 0x08
/*
#define TIMEOUT_LONG 10
#define MAXERRORS 10
-static inline void write_byte(int fd, char cc) {
- write(fd, &cc, 1);
-}
-
-static inline void write_flush(int fd) {
- tcdrain(fd);
-}
-
-static inline void read_flush(int fd) {
- tcflush(fd, TCIFLUSH);
-}
-
-static int read_byte(int fd, unsigned int timeout) {
+static int read_byte(int fd, unsigned int timeout)
+{
char buf[1];
int n;
#define note_error(fmt,args...) \
snprintf(error_buf, error_buf_size, fmt,##args)
- read_flush(ttyfd);
+ /* Flush pending input */
+ tcflush(ttyfd, TCIFLUSH);
/* Ask for CRC; if we get errors, we will go with checksum */
- write_byte(ttyfd, nak);
- write_flush(ttyfd);
+ write(ttyfd, &nak, 1);
for (;;) {
int blockBegin;
break;
case EOT:
- write_byte(ttyfd, ACK);
- write_flush(ttyfd);
+ nak = ACK;
+ write(ttyfd, &nak, 1);
goto done;
default:
wantBlockNo++;
length += blockLength;
- if (bb_full_write(filefd, blockBuf, blockLength) < 0) {
+ if (full_write(filefd, blockBuf, blockLength) < 0) {
note_error("write to file failed: %m");
goto fatal;
}
next:
errors = 0;
- write_byte(ttyfd, ACK);
- write_flush(ttyfd);
+ nak = ACK;
+ write(ttyfd, &nak, 1);
continue;
error:
errors++;
if (errors == MAXERRORS) {
/* Abort */
- int i;
// if using crc, try again w/o crc
if (nak == 'C') {
note_error("too many errors; giving up");
fatal:
- for (i = 0; i < 5; i ++)
- write_byte(ttyfd, CAN);
- for (i = 0; i < 5; i ++)
- write_byte(ttyfd, BS);
- write_flush(ttyfd);
+ /* 5 CAN followed by 5 BS */
+ write(ttyfd, "\030\030\030\030\030\010\010\010\010\010", 10);
return -1;
}
- read_flush(ttyfd);
- write_byte(ttyfd, nak);
- write_flush(ttyfd);
+ /* Flush pending input */
+ tcflush(ttyfd, TCIFLUSH);
+
+ write(ttyfd, &nak, 1);
}
done:
{
}
+int rx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rx_main(int argc, char **argv)
{
char *fn;
bb_show_usage();
fn = argv[1];
- ttyfd = bb_xopen3("/dev/tty", O_RDWR, 0);
- filefd = bb_xopen3(fn, O_RDWR|O_CREAT|O_TRUNC, 0666);
+ ttyfd = xopen(CURRENT_TTY, O_RDWR);
+ filefd = xopen(fn, O_RDWR|O_CREAT|O_TRUNC);
if (tcgetattr(ttyfd, &tty) < 0)
- bb_error_msg_and_die("%s: tcgetattr failed: %m\n", argv[0]);
+ bb_perror_msg_and_die("tcgetattr");
orig_tty = tty;
tcsetattr(ttyfd, TCSAFLUSH, &orig_tty);
if (n < 0)
- bb_error_msg_and_die("\n%s: receive failed:\n %s\n",
- argv[0], error_buf);
+ bb_error_msg_and_die("\nreceive failed:\n %s", error_buf);
- bb_fflush_stdout_and_exit(EXIT_SUCCESS);
+ fflush_stdout_and_exit(EXIT_SUCCESS);
}