*
* This was originally written for blob and then adapted for busybox.
*/
+//config:config RX
+//config: bool "rx (2.9 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Receive files using the Xmodem protocol.
+
+//applet:IF_RX(APPLET(rx, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_RX) += rx.o
//usage:#define rx_trivial_usage
//usage: "FILE"
int blockBegin;
int blockNo, blockNoOnesCompl;
int cksum_or_crc;
- int expected;
+ unsigned expected;
int i, j;
blockBegin = read_byte(timeout);
&& blockBuf[blockLength - 3] == PAD
) {
while (blockLength
- && blockBuf[blockLength - 1] == PAD
+ && blockBuf[blockLength - 1] == PAD
) {
blockLength--;
}
}
}
/* Write previously received block */
- if (blockLength) {
- errno = 0;
- if (full_write(file_fd, blockBuf, blockLength) != blockLength) {
- bb_perror_msg("can't write to file");
- goto fatal;
- }
+ errno = 0;
+ if (full_write(file_fd, blockBuf, blockLength) != blockLength) {
+ bb_perror_msg(bb_msg_write_error);
+ goto fatal;
}
timeout = TIMEOUT;
blockBuf[i] = cc;
}
+ cksum_or_crc = read_byte(TIMEOUT);
+ if (cksum_or_crc < 0)
+ goto timeout;
if (do_crc) {
- cksum_or_crc = read_byte(TIMEOUT);
- if (cksum_or_crc < 0)
- goto timeout;
cksum_or_crc = (cksum_or_crc << 8) | read_byte(TIMEOUT);
if (cksum_or_crc < 0)
goto timeout;
- } else {
- cksum_or_crc = read_byte(TIMEOUT);
- if (cksum_or_crc < 0)
- goto timeout;
}
if (blockNo == ((wantBlockNo - 1) & 0xff)) {
}
if (cksum_or_crc != expected) {
bb_error_msg(do_crc ? "crc error, expected 0x%04x, got 0x%04x"
- : "checksum error, expected 0x%02x, got 0x%02x",
- expected, cksum_or_crc);
+ : "checksum error, expected 0x%02x, got 0x%02x",
+ expected, cksum_or_crc);
goto error;
}
continue;
error:
timeout:
+ blockLength = 0;
errors++;
if (errors == MAXERRORS) {
/* Abort */
termios_err = tcgetattr(read_fd, &tty);
if (termios_err == 0) {
+//TODO: use set_termios_to_raw()
orig_tty = tty;
cfmakeraw(&tty);
tcsetattr(read_fd, TCSAFLUSH, &tty);