rsalz@bbn.com (Rich Salz) (05/20/88)
Submitted-by: fthood!egray
Posting-number: Volume 14, Issue 104
Archive-name: pcomm/part06
#! /bin/sh
# This is a shell archive, meaning:
# 1. Remove everything above the #! /bin/sh line.
# 2. Save the resulting text in a file.
# 3. Execute the file with /bin/sh (not csh) to create:
# x_batch.c
# x_menu.c
# x_rcv.c
# x_send.c
# x_win.c
# xmodem.c
export PATH; PATH=/bin:/usr/bin:$PATH
echo shar: "extracting 'x_batch.c'" '(7780 characters)'
if test -f 'x_batch.c'
then
echo shar: "will not over-write existing file 'x_batch.c'"
else
sed 's/^X//' << \SHAR_EOF > 'x_batch.c'
X/*
X * Routines to support the batch protocols.
X */
X
X#include <stdio.h>
X#include <ctype.h>
X#include <curses.h>
X#include "misc.h"
X#include "xmodem.h"
X
X/*
X * Send the file name for the modem7 batch. Only uses 11 characters
X * of the filename.
X */
X
Xint
Xsend_modem7(win, name)
XWINDOW *win;
Xchar *name;
X{
X char *new_name, *fix_name();
X unsigned char sum, calc_sum();
X
X /* convert to 11 character name */
X new_name = fix_name(name);
X sum = calc_sum((unsigned char *) new_name, 12);
X
X putc_line(ACK);
X /* for each character in the name */
X while (*new_name != CTRLZ) {
X putc_line((unsigned char) *new_name);
X
X switch (getc_line(3)) {
X case ACK: /* got it! */
X break;
X case CAN: /* cancel transmission */
X if (getc_line(2) == CAN) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "REMOTE ABORTED");
X wrefresh(win);
X return(CANCEL);
X }
X /* fall thru... */
X default:
X clear_line(win, 12, 24, 1);
X waddstr(win, "NAME FAILED");
X wrefresh(win);
X return(ERROR);
X }
X new_name++;
X }
X putc_line(CTRLZ);
X /* verify the checksum */
X if (getc_line(10) != sum) {
X putc_line('u');
X clear_line(win, 12, 24, 1);
X waddstr(win, "CHECKSUM FAILED");
X wrefresh(win);
X return(ERROR);
X }
X putc_line(ACK);
X return(0);
X}
X
X/*
X * Receive a modem 7 file name. A return code of 1 means the end of the
X * batch transfers.
X */
X
Xint
Xrcv_modem7(win, default_err)
XWINDOW *win;
Xint default_err;
X{
X int i, c, err_method, err_count, got_it;
X unsigned char sum, calc_sum();
X char temp_name[13];
X extern char *null_ptr, file_name[15];
X void change_name(), unfix_name();
X /* send the first char */
X err_method = default_err;
X err_count = 0;
X got_it = 0;
X while (err_count < MAX_ERRORS) {
X /* switch to checksum? */
X if (default_err == 1 && err_count > MAX_ERRORS/2)
X err_method = 0;
X
X if (err_method)
X putc_line('C');
X else
X putc_line(NAK);
X /* what'd we get? */
X if (getc_line(10) == ACK) {
X got_it++;
X break;
X }
X err_count++;
X }
X if (!got_it)
X return(ERROR);
X /* get the name */
X for (i=0; i<12; i++) {
X c = getc_line(3);
X
X switch(c) {
X case EOT: /* end of batch? */
X return(-1);
X case CAN: /* cancel transmission */
X if (getc_line(2) == CAN) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "REMOTE ABORTED");
X wrefresh(win);
X return(CANCEL);
X }
X /* fall thru... */
X case 'u': /* bad name character */
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "BAD NAME");
X wrefresh(win);
X return(ERROR);
X default: /* the name... */
X temp_name[i] = c;
X if (c != CTRLZ)
X putc_line(ACK);
X break;
X }
X }
X temp_name[12] = NULL;
X /* send our checksum */
X sum = calc_sum((unsigned char *) temp_name, 12);
X putc_line(sum);
X /* do they agree ? */
X if (getc_line(10) != ACK) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "BAD NAME");
X wrefresh(win);
X return(ERROR);
X }
X /* load the file_name array */
X unfix_name(temp_name);
X /* any name collisions? */
X change_name(win, file_name);
X return(0);
X}
X
X/*
X * Send the block 0 information for a ymodem batch transfer. Uses only
X * the name component of the path and the file size.
X */
X
Xint
Xsend_ymodem(win, file, size)
XWINDOW *win;
Xchar *file;
Xint size;
X{
X int i, crc;
X char *strcpy();
X unsigned char buf[133];
X /* start with a clean block */
X for (i=0; i<132; i++)
X buf[i] = NULL;
X /* the header */
X buf[0] = SOH;
X buf[1] = 0;
X buf[2] = 255;
X
X /*
X * The block zero consists of the file name (no path component),
X * a NULL, and the file length (as a string). The end of batch
X * marker is an empty block.
X */
X if (file != NULL) {
X strcpy((char *) &buf[3], file);
X sprintf((char *) &buf[strlen(file)+4], "%d", size);
X }
X /* the crc */
X crc = calc_crc(&buf[3], 128);
X buf[131] = crc >> 8;
X buf[132] = crc;
X /* the block count */
X mvwaddstr(win, 7, 24, "0 ");
X
X return(send_block(win, buf, 133));
X}
X
X/*
X * Receive the block 0 information for a ymodem batch transfer. We
X * only use the file name and the size (if present). Currently doesn't
X * support full path names.
X */
X
Xint
Xrcv_ymodem(win)
XWINDOW *win;
X{
X int code, length_is_at;
X extern unsigned char buf[1029];
X extern int file_length;
X extern char file_name[15];
X
X file_length = 0;
X file_name[0] = NULL;
X /* read the zero block */
X if (code = rcv_block(win, 1, 1024, 0))
X return(code);
X /* at end of batch */
X if (buf[3] == NULL)
X return(0);
X /* get the file name */
X change_name(win, (char *) &buf[3]);
X /* any trouble ?? */
X if (file_name[0] == NULL) {
X putc_line(CAN);
X return(0);
X }
X /*
X * The file length is placed after the NULL of the file name
X * and is terminated by another NULL. If the length is missing,
X * atoi() will see a NULL and return 0.
X */
X length_is_at = strlen((char *) &buf[3]) + 4;
X file_length = atoi((char *) &buf[length_is_at]);
X return(0);
X}
X
X/*
X * Handle file name collisions. Prepend an 'X' to the name until you find
X * a name that doesn't already exist. Creates a NULL name on error.
X * Loads the global character array 'file_name'.
X */
X
Xvoid
Xchange_name(win, str)
XWINDOW *win;
Xchar *str;
X{
X int i, modified;
X char temp[15], ans[15], *s, *strrchr(), *strcpy(), *strncat();
X unsigned int sleep();
X extern char file_name[15];
X /* dissect the name component */
X if ((s = strrchr(str, '/')))
X strcpy(temp, s++);
X else
X strcpy(temp, str);
X
X strcpy(ans, temp);
X file_name[0] = NULL;
X /* write permission on directory ? */
X if (access(".", 2)) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "NO WRITE ON DIRECTORY");
X wrefresh(win);
X return;
X }
X /* prepend up to 13 'X's */
X modified = 0;
X for (i=1; i<14; i++) {
X if (access(ans, 0)) {
X if (modified) {
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "NAME COLLISION");
X wrefresh(win);
X sleep(1);
X }
X strcpy(file_name, ans);
X return;
X }
X
X modified++;
X strcpy(temp, "X");
X strncat(temp, ans, 13);
X temp[14] = NULL;
X strcpy(ans, temp);
X }
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "BAD NAME");
X wrefresh(win);
X return;
X}
X
X/*
X * Convert a perfectly good Unix file name to fit the CP/M file name
X * rules. Used for the modem7 batch file transfer. Returns a pointer
X * to the new name.
X */
X
Xchar *
Xfix_name(path)
Xchar *path;
X{
X int dot;
X char *s, *name, temp[15], *ext, *strcpy(), *strrchr();
X static char ans[13];
X /* ignore the path component */
X if (s = strrchr(path, '/'))
X strcpy(temp, s++);
X else
X strcpy(temp, path);
X name = temp;
X
X ext = NULL;
X dot = 0;
X for (s = name; *s; ++s) {
X if (*s == '.' && !dot) {
X dot = 1;
X *s = NULL;
X ext = s + 1;
X }
X if (islower(*s))
X *s = toupper(*s);
X }
X /* if null name component */
X if (*name == NULL)
X name = "X";
X /* if name too long */
X if (strlen(name) > 8)
X *(name+8) = NULL;
X /* if extension too long */
X if (strlen(ext) > 3)
X *(ext+3) = NULL;
X
X sprintf(ans, "%-8.8s%-3.3s%c", temp, ext, CTRLZ);
X return(ans);
X}
X
X/*
X * Convert a CP/M style filename into a legal Unix file name. Loads the
X * global character array 'file_name'.
X */
X
Xvoid
Xunfix_name(cpm_name)
Xchar *cpm_name;
X{
X int i, n, dot;
X char temp[15];
X extern char file_name[15];
X
X file_name[0] = NULL;
X if (!*cpm_name)
X return;
X
X strcpy(temp, cpm_name);
X /* 8 character of the name */
X n = 0;
X for (i=0; i<8; i++) {
X if (temp[i] != ' ') {
X if (isupper(temp[i]))
X file_name[n++] = tolower(temp[i]);
X else
X file_name[n++] = temp[i];
X }
X }
X /* 3 character extension */
X dot = 0;
X for (i=8; i<11; i++) {
X if (temp[i] != ' ') {
X if (!dot) {
X dot++;
X file_name[n++] = '.';
X }
X if (isupper(temp[i]))
X file_name[n++] = tolower(temp[i]);
X else
X file_name[n++] = temp[i];
X }
X }
X file_name[n] = NULL;
X return;
X}
SHAR_EOF
if test 7780 -ne "`wc -c < 'x_batch.c'`"
then
echo shar: "error transmitting 'x_batch.c'" '(should have been 7780 characters)'
fi
fi
echo shar: "extracting 'x_menu.c'" '(4000 characters)'
if test -f 'x_menu.c'
then
echo shar: "will not over-write existing file 'x_menu.c'"
else
sed 's/^X//' << \SHAR_EOF > 'x_menu.c'
X/*
X * Open a window to display the choices of file transfer protocols and
X * prompt for the file name(s). A return code of 1 means turn the
X * input routine back on.
X */
X
X#include <stdio.h>
X#include <curses.h>
X#include "misc.h"
X#include "xmodem.h"
X
Xint
Xxfer_menu(up)
Xint up;
X{
X WINDOW *xm_win, *newwin();
X char *list, *get_names();
X int type, is_batch;
X extern char *null_ptr;
X void xfer_win(), xfer_ascii(), free_ptr();
X
X xm_win = newwin(15, 20, 2, 45);
X
X mvwaddstr(xm_win, 2, 3, "1) xmodem");
X mvwaddstr(xm_win, 3, 3, "2) xmodem-1k");
X mvwaddstr(xm_win, 4, 3, "3) modem7");
X mvwaddstr(xm_win, 5, 3, "4) ymodem");
X mvwaddstr(xm_win, 6, 3, "5) ymodem-g");
X mvwaddstr(xm_win, 7, 3, "6) ASCII");
X mvwaddstr(xm_win, 11, 3, "ESC to Abort");
X mvwaddstr(xm_win, 13, 3, "Protocol:");
X box(xm_win, '|', '-');
X if (up)
X mvwattrstr(xm_win, 0, 6, A_BOLD, " Upload ");
X else
X mvwattrstr(xm_win, 0, 5, A_BOLD, " Download ");
X
X wmove(xm_win, 13, 13);
X wrefresh(xm_win);
X /* get the protocol */
X while ((type = get_num(xm_win, 1)) != -1) {
X if (type >=1 && type <= PROTOCOLS)
X break;
X beep();
X mvwaddch(xm_win, 13, 13, ' ');
X wmove(xm_win, 13, 13);
X wrefresh(xm_win);
X }
X /* is a batch protocol ? */
X is_batch = 0;
X switch (type-1) {
X case MODEM7:
X case YMODEM:
X case YMODEM_G:
X is_batch++;
X break;
X default:
X break;
X }
X werase(xm_win);
X wrefresh(xm_win);
X delwin(xm_win);
X
X touchwin(stdscr);
X refresh();
X
X if (type == -1)
X return(0);
X type--;
X
X /*
X * When receiving files in one of the batch modes, there is
X * need to prompt for a list of file names.
X */
X list = null_ptr;
X if (up || !is_batch) {
X if (!(list = get_names(up, type, is_batch)))
X return(0);
X }
X /* if ascii transfer */
X if (type == XASCII) {
X xfer_ascii(list, up);
X free_ptr(list);
X if (up)
X return(0);
X return(1);
X }
X xfer_win(list, up, type);
X free_ptr(list);
X return(1);
X}
X
X/*
X * Prompt for a list of files for the transfer programs. A NULL return
X * code means you chickened out.
X */
X
Xchar *
Xget_names(up, type, is_batch)
Xint up, type, is_batch;
X{
X int can;
X WINDOW *gn_win, *newwin();
X char *ans, *list, *file, buf[40], *expand(), *get_str(), *strtok();
X static char *direction[2] = {"Receive", "Send"};
X static char *protocol[PROTOCOLS] = {"xmodem", "xmodem-1k", "modem7",
X "ymodem", "ymodem-g", "ASCII"};
X /* prompt for file spec */
X gn_win = newwin(7, 70, 5, 5);
X
X mvwaddstr(gn_win, 3, 4, "Enter filename: ");
X box(gn_win, '|', '-');
X sprintf(buf, " %s %s ", direction[up], protocol[type]);
X
X while (1) {
X mvwattrstr(gn_win, 0, 3, A_BOLD, buf);
X wmove(gn_win, 3, 20);
X wrefresh(gn_win);
X /* get the answers */
X if (is_batch)
X ans = get_str(gn_win, 60, NULL, NULL);
X else
X ans = get_str(gn_win, 60, NULL, " ");
X
X if (ans == NULL || *ans == NULL) {
X list = NULL;
X break;
X }
X list = expand(ans);
X /* batchs check "on the fly" */
X if (is_batch)
X break;
X /*
X * The non-batch protocols don't check read and write
X * permission on the fly, so we check 'em here. Since
X * they aren't batch, we use only one file.
X */
X file = strtok(list, " ");
X /* check read permission */
X if (up) {
X if (access(file, 4)) {
X beep();
X mvwattrstr(gn_win, 4, 15, A_BOLD, "Can't find or no read permission");
X wrefresh(gn_win);
X wait_key(gn_win, 3);
X clear_line(gn_win, 4, 15, 1);
X clear_line(gn_win, 3, 20, 1);
X wrefresh(gn_win);
X }
X else
X break;
X }
X /* check write permission */
X else {
X if (!(can = can_write(file))) {
X beep();
X clear_line(gn_win, 4, 15, 1);
X mvwattrstr(gn_win, 4, 15, A_BOLD, "No write permission");
X wrefresh(gn_win);
X wait_key(gn_win, 3);
X clear_line(gn_win, 4, 15, 1);
X clear_line(gn_win, 3, 20, 1);
X wrefresh(gn_win);
X }
X if (can == 2) {
X if (!yes_prompt(gn_win, 4, 15, A_BOLD, "File exists, overwrite")) {
X list = NULL;
X break;
X }
X }
X if (can)
X break;
X }
X }
X werase(gn_win);
X wrefresh(gn_win);
X delwin(gn_win);
X
X touchwin(stdscr);
X refresh();
X return(list);
X}
SHAR_EOF
if test 4000 -ne "`wc -c < 'x_menu.c'`"
then
echo shar: "error transmitting 'x_menu.c'" '(should have been 4000 characters)'
fi
fi
echo shar: "extracting 'x_rcv.c'" '(10526 characters)'
if test -f 'x_rcv.c'
then
echo shar: "will not over-write existing file 'x_rcv.c'"
else
sed 's/^X//' << \SHAR_EOF > 'x_rcv.c'
X/*
X * Receive a list of files using a version of Ward Christensen's file
X * transfer protocol. A return code of 1 means the user must acknowledge
X * an error condition.
X */
X
X#include <stdio.h>
X#include <curses.h>
X#include "dial_dir.h"
X#include "misc.h"
X#include "xmodem.h"
X
Xunsigned char buf[1029];
Xchar file_name[15];
Xint file_length, err_method, tot_err, block_size;
X
Xint
Xrcv_xmodem(win, list, type, fast)
XWINDOW *win;
Xchar *list;
Xint type, fast;
X{
X FILE *fp;
X int default_err, is_batch, max_block, code, file_count, i, got_hdr;
X int block, recv, hours, mins, secs;
X float percent, performance;
X unsigned char blk;
X unsigned int sleep();
X char *file, *name, *strcpy(), *strrchr(), *strtok();
X void cancel_xfer();
X
X /*
X * What type of xmodem? The default_err means: 0=checksum only,
X * 1=CRC or checksum, 2=CRC only, and 3=none.
X */
X switch(type) {
X case XMODEM:
X mvwaddstr(win, 2, 24, "xmodem");
X default_err = 1;
X is_batch = 0;
X max_block = 128;
X break;
X case XMODEM_1k:
X mvwaddstr(win, 2, 24, "xmodem-1k");
X default_err = 1;
X is_batch = 0;
X max_block = 1024;
X break;
X case MODEM7:
X mvwaddstr(win, 2, 24, "modem7");
X default_err = 0;
X is_batch = 1;
X max_block = 128;
X break;
X case YMODEM:
X mvwaddstr(win, 2, 24, "ymodem");
X default_err = 2;
X is_batch = 1;
X max_block = 1024;
X performance = 1.09;
X break;
X case YMODEM_G:
X mvwaddstr(win, 2, 24, "ymodem-g");
X default_err = 3;
X is_batch = 1;
X max_block = 1024;
X performance = 1.02;
X break;
X }
X
X tot_err = 0;
X file_count = 0;
X mvwaddstr(win, 11, 24, "0 ");
X
X while (1) {
X file_count++;
X file_length = 0;
X /* user supplied name */
X if (!is_batch) {
X if (file_count > 1)
X break;
X
X file = strtok(list, " ");
X /* dissect the file name */
X if ((name = strrchr(file, '/')))
X strcpy(file_name, name++);
X else
X strcpy(file_name, file);
X }
X /* get the modem7 file name */
X if (type == MODEM7) {
X if (code = rcv_modem7(win, default_err))
X return(code +1);
X
X file = file_name;
X }
X /* get the block 0 */
X if (type == YMODEM || type == YMODEM_G) {
X if (code = send_first(win, max_block, default_err))
X return(code +1);
X
X if (code = rcv_ymodem(win))
X return(code +1);
X
X /* at the end? */
X if (buf[3] == NULL) {
X beep();
X wrefresh(win);
X putc_line(ACK);
X sleep(1);
X return(0);
X }
X file = file_name;
X }
X /* any trouble ? */
X if (file_name[0] == NULL)
X continue;
X
X clear_line(win, 3, 24, 1);
X waddstr(win, file_name);
X /* if file length is known */
X if (file_length) {
X mvwprintw(win, 4, 24, "%-10d", file_length);
X
X secs = (file_length * 10.0 / dir->baud[dir->d_cur]) * performance;
X hours = secs / 3600;
X mins = (secs % 3600) / 60;
X secs = (secs % 3600) % 60;
X
X mvwprintw(win, 6, 24, "%d:%02d:%02d", hours, mins, secs);
X }
X /* some starting numbers */
X mvwaddstr(win, 7, 24, "0 ");
X if (file_length && fast)
X mvwaddstr(win, 8, 24, "0% ");
X if (fast)
X mvwaddstr(win, 9, 24, "0 ");
X mvwaddstr(win, 10, 24, "0 ");
X clear_line(win, 12, 24, 1);
X waddstr(win, "NONE");
X wrefresh(win);
X
X /*
X * If the user supplied the name, write permission is checked
X * by the get_names() routine in xfer_menu(). If a modem7
X * or ymodem supplied name, the permission is checked by the
X * rcv_modem7() and rcv_ymodem() routines.
X */
X /* open the file */
X if (!(fp = fopen(file, "w"))) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "CAN'T OPEN FILE");
X wrefresh(win);
X cancel_xfer();
X return(1);
X }
X /* ACK the block 0 */
X if (type == YMODEM || type == YMODEM_G)
X putc_line(ACK);
X
X if (code = send_first(win, max_block, default_err)) {
X fclose(fp);
X cancel_xfer();
X return(code +1);
X }
X /* here we go... */
X blk = 1;
X block = 1;
X recv = 0;
X got_hdr = 1;
X while (1) {
X code = rcv_block(win, got_hdr, max_block, blk);
X
X if (code < 0) {
X fclose(fp);
X cancel_xfer();
X return(code +1);
X }
X got_hdr = 0;
X /* are we done? */
X if (buf[0] == EOT) {
X if (!is_batch) {
X beep();
X wrefresh(win);
X sleep(1);
X }
X break;
X }
X /* if not a duplicate block */
X if (!code) {
X fwrite((char *) &buf[3], sizeof(buf[0]), block_size, fp);
X mvwprintw(win, 7, 24, "%-5d", block);
X if (fast) {
X recv += block_size;
X mvwprintw(win, 9, 24, "%-10d", recv);
X }
X blk++;
X block++;
X }
X /*
X * If the length is known, give the same status
X * report as uploading
X */
X if (file_length && fast) {
X percent = recv * 100.0 / file_length;
X if (percent > 100.0)
X percent = 100.0;
X mvwprintw(win, 8, 24, "%0.1f%%", percent);
X }
X wrefresh(win);
X putc_line(ACK);
X }
X if (file_length && fast) {
X mvwaddstr(win, 8, 24, "100% ");
X wrefresh(win);
X }
X /*
X * If the file length is not known, then search backwards
X * from the end of the file until you find a character that
X * is not the ^Z padding character
X */
X if (!file_length) {
X for (i=block_size+2; i>2; i--) {
X if (buf[i] != CTRLZ)
X break;
X }
X file_length = recv - block_size + i -2;
X }
X fclose(fp);
X fix_length(file_name, file_length);
X /* ACK the EOT */
X putc_line(ACK);
X }
X return(0);
X}
X
X/*
X * Send the first character to start the transmission and set the error
X * checking method. Returns the standard error codes or 0 on success.
X * The variables err_method and block_size are global.
X */
X
Xint
Xsend_first(win, max_block, default_err)
XWINDOW *win;
Xint max_block, default_err;
X{
X int i, err_count;
X unsigned int sleep();
X /* default error method */
X err_method = default_err;
X if (err_method > 1)
X err_method--;
X /* send the first char */
X err_count = 0;
X while (err_count < MAX_ERRORS*2) {
X mvwprintw(win, 10, 24, "%-2d", err_count);
X
X /* check for keyboard abort */
X if (wgetch(win) == 27) {
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "ABORTED");
X wrefresh(win);
X sleep(3);
X return(ABORT);
X }
X /* switch to checksum? */
X if (default_err == 1 && err_count > MAX_ERRORS)
X err_method = 0;
X
X /* send error method code */
X clear_line(win, 5, 24, 1);
X switch (err_method) {
X case 0:
X waddstr(win, "CHECKSUM");
X putc_line(NAK);
X break;
X case 1:
X waddstr(win, "CRC");
X putc_line('C');
X break;
X case 2:
X waddstr(win, "NONE");
X putc_line('G');
X break;
X }
X /*
X * We've cut the delay time in half, so we double
X * the allowable errors
X */
X if ((i = getc_line(5)) == -1) {
X err_count++;
X clear_line(win, 12, 24, 1);
X waddstr(win, "NO RESPONSE");
X wrefresh(win);
X continue;
X }
X buf[0] = i;
X
X switch(buf[0]) {
X case SOH: /* small block follows */
X block_size = 128;
X return(0);
X case STX: /* large block follows */
X if (max_block == 1024) {
X block_size = 1024;
X return(0);
X }
X /* fall thru */
X default:
X err_count++;
X clear_line(win, 12, 24, 1);
X waddstr(win, "BAD HEADER");
X wrefresh(win);
X /* read some garbage... */
X fread_line(buf, 1028, 3);
X putc_line(NAK);
X break;
X }
X }
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "TIMED OUT");
X wrefresh(win);
X return(ERROR);
X}
X
X/*
X * Receive a block of info from the host. Returns a 0 on success, a 1 on
X * a duplicate block or the standard error codes. The variables
X * err_method and block_size are global.
X */
X
Xint
Xrcv_block(win, got_hdr, max_block, blk)
XWINDOW *win;
Xint got_hdr, max_block;
Xunsigned char blk;
X{
X int i, err_count, bad_block, out_of_sync, crc;
X unsigned int packet, sleep();
X unsigned char calc_sum(), crc_1, crc_2;
X
X err_count = 0;
X while (err_count < MAX_ERRORS) {
X mvwprintw(win, 10, 24, "%-2d", err_count);
X mvwprintw(win, 11, 24, "%-3d", tot_err);
X
X /* scan the keyboard for abort */
X if (wgetch(win) == 27) {
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "ABORTED");
X wrefresh(win);
X sleep(3);
X return(ABORT);
X }
X /* have we already got a hdr? */
X if (!got_hdr) {
X if ((i = getc_line(10)) == -1) {
X err_count++;
X tot_err++;
X clear_line(win, 12, 24, 1);
X waddstr(win, "NO RESPONSE");
X wrefresh(win);
X continue;
X }
X buf[0] = i;
X /* what'd we get? */
X switch(buf[0]) {
X case EOT: /* we're done! */
X clear_line(win, 12, 24, 1);
X waddstr(win, "TRANSFER COMPLETE");
X wrefresh(win);
X sleep(1);
X return(0);
X case SOH: /* small block follows */
X block_size = 128;
X break;
X case STX: /* large block follows */
X if (max_block == 1024) {
X block_size = 1024;
X break;
X }
X /* fall thru... */
X default:
X err_count++;
X tot_err++;
X clear_line(win, 12, 24, 1);
X waddstr(win, "BAD HEADER");
X wrefresh(win);
X
X /* flush a bad packet */
X fread_line(buf, 1028, 5);
X putc_line(NAK);
X continue;
X }
X }
X got_hdr = 0;
X /* read the rest of the packet */
X packet = block_size + 2 + (err_method ? 2 : 1);
X if (fread_line(&buf[1], packet, 10) == -1) {
X clear_line(win, 12, 24, 1);
X waddstr(win, "TIMED OUT");
X wrefresh(win);
X putc_line(NAK);
X err_count++;
X tot_err++;
X continue;
X }
X
X /*
X * Validation of the packet includes checking the
X * block number, its complement, and the crc/checksum.
X */
X out_of_sync = 0;
X if (buf[1] != blk || buf[2] != (unsigned char) ~blk)
X out_of_sync++;
X
X bad_block = 0;
X switch(err_method) {
X case 0: /* checksum */
X if (buf[block_size +3] != calc_sum(&buf[3], block_size))
X bad_block++;
X break;
X case 1: /* CRC */
X crc = calc_crc(&buf[3], block_size);
X crc_1 = crc >> 8;
X crc_2 = crc;
X if (buf[block_size +3] != crc_1 || buf[block_size +4] != crc_2)
X bad_block++;
X break;
X case 2: /* none */
X return(0);
X }
X /* handle errors */
X if (bad_block) {
X clear_line(win, 12, 24, 1);
X if (err_method)
X waddstr(win, "CRC FAILED");
X else
X waddstr(win, "CHECKSUM FAILED");
X wrefresh(win);
X putc_line(NAK);
X err_count++;
X tot_err++;
X continue;
X }
X /* not really an error */
X if (out_of_sync) {
X /*
X * If a perfect packet is off by 1 block number,
X * (a lost ACK could cause this) then treat it as
X * a good block but don't write it to disk.
X */
X if (buf[1] == (unsigned char) blk-1)
X return(1);
X
X clear_line(win, 12, 24, 1);
X waddstr(win, "OUT OF SYNC");
X wrefresh(win);
X putc_line(NAK);
X err_count++;
X tot_err++;
X continue;
X }
X return(0);
X }
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "TOO MANY ERRORS");
X wrefresh(win);
X return(ERROR);
X}
SHAR_EOF
if test 10526 -ne "`wc -c < 'x_rcv.c'`"
then
echo shar: "error transmitting 'x_rcv.c'" '(should have been 10526 characters)'
fi
fi
echo shar: "extracting 'x_send.c'" '(10461 characters)'
if test -f 'x_send.c'
then
echo shar: "will not over-write existing file 'x_send.c'"
else
sed 's/^X//' << \SHAR_EOF > 'x_send.c'
X/*
X * Send a list of files using a version of Ward Christensen's file
X * transfer protocol. A non-zero return code means an error must be
X * acknowledged by the user.
X */
X
X#include <stdio.h>
X#include <curses.h>
X#include <sys/types.h>
X#include <sys/stat.h>
X#include "dial_dir.h"
X#include "status.h"
X#include "misc.h"
X#include "xmodem.h"
X
Xint tot_err, err_method;
X
Xint
Xsend_xmodem(win, list, type, fast)
XWINDOW *win;
Xchar *list;
Xint type, fast;
X{
X FILE *fp;
X int i, block_size, file_count, secs, mins, hours, size, xmit_size;
X int big_blocks, small_blocks, err_count, got_it, num, block, sent;
X int crc, is_batch, code, max_block, default_err;
X char *file, *strtok(), *name, *strrchr();
X unsigned char buf[1029], blk, calc_sum();
X unsigned int packet, sleep();
X float performance, percent;
X struct stat sbuf;
X
X /*
X * What type of xmodem? The default_err means: 0=checksum only,
X * 1=checksum or CRC, 2=CRC only, and 3=none.
X */
X switch(type) {
X case XMODEM:
X mvwaddstr(win, 2, 24, "xmodem");
X is_batch = 0;
X default_err = 1;
X max_block = 128;
X performance = 1.36;
X break;
X case XMODEM_1k:
X mvwaddstr(win, 2, 24, "xmodem-1k");
X is_batch = 0;
X default_err = 1;
X max_block = 1024;
X performance = 1.09;
X break;
X case MODEM7:
X mvwaddstr(win, 2, 24, "modem7");
X is_batch = 1;
X default_err = 0;
X max_block = 128;
X performance = 1.36;
X break;
X case YMODEM:
X mvwaddstr(win, 2, 24, "ymodem");
X is_batch = 1;
X default_err = 2;
X max_block = 1024;
X performance = 1.09;
X break;
X case YMODEM_G:
X mvwaddstr(win, 2, 24, "ymodem-g");
X is_batch = 1;
X default_err = 3;
X max_block = 1024;
X performance = 1.02;
X break;
X }
X
X tot_err = 0;
X file_count = 0;
X mvwaddstr(win, 11, 24, "0 ");
X
X /* each one in the list */
X file = strtok(list, " ");
X do {
X /* is it a batch type ? */
X file_count++;
X if (file_count > 1 && !is_batch)
X break;
X /* display the name */
X clear_line(win, 3, 24, 1);
X if ((name = strrchr(file, '/')))
X name++;
X else
X name = file;
X waddstr(win, name);
X wrefresh(win);
X /* get the file size */
X if (stat(file, &sbuf) < 0) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "CAN'T FIND FILE");
X wrefresh(win);
X sleep(3);
X continue;
X }
X
X size = sbuf.st_size;
X mvwprintw(win, 4, 24, "%-10d", size);
X clear_line(win, 5, 24, 1);
X
X if (access(file, 4)) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "PERMISSION DENIED");
X wrefresh(win);
X sleep(3);
X continue;
X }
X if (!(fp = fopen(file, "r"))) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "CAN'T OPEN FILE");
X wrefresh(win);
X sleep(3);
X continue;
X }
X /* get the xmit size */
X block_size = max_block;
X big_blocks = 0;
X small_blocks = 0;
X if (block_size == 128) {
X small_blocks = size / 128;
X if (size % 128)
X small_blocks++;
X }
X else {
X big_blocks = size / 1024;
X small_blocks = (size % 1024) / 128;
X if (size % 128)
X small_blocks++;
X
X if (small_blocks == 8 && !big_blocks) {
X big_blocks++;
X small_blocks = 0;
X }
X /* if tiny file */
X if (big_blocks == 0)
X block_size = 128;
X }
X
X xmit_size = (big_blocks * 1024) + (small_blocks * 128);
X /* add block 0 to the size */
X if (type == YMODEM || type == YMODEM_G)
X xmit_size += 128;
X
X secs = (xmit_size * 10.0 / dir->baud[dir->d_cur]) * performance;
X hours = secs / 3600;
X mins = (secs % 3600) / 60;
X secs = (secs % 3600) % 60;
X
X mvwprintw(win, 6, 24, "%d:%02d:%02d", hours, mins, secs);
X
X /* some starting numbers */
X mvwaddstr(win, 7, 24, " ");
X mvwaddstr(win, 8, 24, "0% ");
X mvwaddstr(win, 9, 24, "0 ");
X mvwaddstr(win, 10, 24, "0 ");
X clear_line(win, 12, 24, 1);
X waddstr(win, "NONE");
X wrefresh(win);
X /* send the batch stuff */
X switch (type) {
X case MODEM7:
X if (code = rcv_first(win, default_err)) {
X fclose(fp);
X return(code +1);
X }
X
X if (send_modem7(win, name)) {
X fclose(fp);
X return(1);
X }
X break;
X case YMODEM:
X case YMODEM_G:
X if (code = rcv_first(win, default_err)) {
X fclose(fp);
X return(code +1);
X }
X
X if (code = send_ymodem(win, name, size)) {
X fclose(fp);
X /*
X * CANCEL now means that the other
X * end can't open that file.
X */
X if (code == CANCEL)
X break;
X return(code +1);
X }
X xmit_size -= 128;
X break;
X default:
X code = 0;
X break;
X }
X /* remote can't receive that file ? */
X if (code == CANCEL)
X break;
X /* wait for first character */
X if (code = rcv_first(win, default_err)) {
X fclose(fp);
X return(code +1);
X }
X /* here we go... */
X sent = 0;
X block = 1;
X blk = 1;
X while (num = fread((char *) &buf[3], sizeof(buf[0]), block_size, fp)) {
X
X /* fill short block */
X if (num < block_size) {
X for (i=num; i<block_size; i++)
X buf[i+3] = CTRLZ;
X }
X
X /* show current stats */
X mvwprintw(win, 7, 24, "%-5d", block);
X if (fast) {
X percent = sent * 100.0 / xmit_size;
X mvwprintw(win, 8, 24, "%0.1f%%", percent);
X mvwprintw(win, 9, 24, "%-10d", sent);
X }
X wrefresh(win);
X
X /* build the header */
X if (block_size == 128)
X buf[0] = SOH;
X else
X buf[0] = STX;
X
X buf[1] = blk;
X buf[2] = ~blk;
X
X /* build the error detection stuff */
X switch (err_method) {
X case 0: /* checksum */
X buf[block_size+3] = calc_sum(&buf[3], block_size);
X packet = block_size +4;
X break;
X case 1: /* CRC */
X crc = calc_crc(&buf[3], block_size);
X buf[block_size+3] = crc >> 8;
X buf[block_size+4] = crc;
X packet = block_size +5;
X break;
X case 2: /* none */
X buf[block_size+3] = 0;
X buf[block_size+4] = 0;
X packet = block_size +5;
X break;
X }
X
X /* send the block */
X if (code = send_block(win, buf, packet)) {
X fclose(fp);
X return(code +1);
X }
X block++;
X blk++;
X sent += block_size;
X
X /* change block size ? */
X if (xmit_size - sent < 1024)
X block_size = 128;
X }
X mvwaddstr(win, 8, 24, "100% ");
X mvwprintw(win, 9, 24, "%-10d", sent);
X /* at the end of the file */
X err_count = 0;
X got_it = 0;
X while (err_count < MAX_ERRORS) {
X putc_line(EOT);
X if (getc_line(10) == ACK) {
X got_it++;
X break;
X }
X err_count++;
X }
X clear_line(win, 12, 24, 1);
X if (!got_it) {
X /*
X * So what??? We don't do anything if there is
X * no acknowledge from the host!!
X */
X waddstr(win, "NO ACKNOWLEDGE");
X }
X else
X waddstr(win, "TRANSFER COMPLETE");
X if (!is_batch)
X beep();
X wrefresh(win);
X sleep(2);
X /* prepare to start again */
X fclose(fp);
X } while (file = strtok((char *) NULL, " "));
X
X /*
X * The end of batch markers... For modem7 it's an ACK and EOT, for
X * ymodem, it's an empty block 0.
X */
X switch (type) {
X case MODEM7:
X if (code = rcv_first(win, default_err))
X return(code +1);
X putc_line(ACK);
X putc_line(EOT);
X beep();
X wrefresh(win);
X break;
X case YMODEM:
X case YMODEM_G:
X if (code = rcv_first(win, default_err))
X return(code +1);
X
X if (code = send_ymodem(win, NULL, 0))
X return(code +1);
X beep();
X wrefresh(win);
X break;
X default:
X break;
X }
X return(0);
X}
X
X/*
X * Wait for the first character to start the transmission. This first
X * character also sets the crc/checksum method. Returns the standard
X * error codes, or 0 on success. The variable err_method is global.
X */
X
Xint
Xrcv_first(win, default_err)
XWINDOW *win;
Xint default_err;
X{
X int err_count;
X unsigned int sleep();
X
X err_count = 0;
X while (err_count < MAX_ERRORS) {
X
X /* scan the keyboard for abort */
X if (wgetch(win) == 27) {
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "ABORTED");
X wrefresh(win);
X sleep(3);
X return(ABORT);
X }
X
X /* scan the tty line */
X switch(getc_line(10)) {
X case NAK: /* checksum marker */
X if (default_err < 2) {
X mvwaddstr(win, 5, 24, "CHECKSUM");
X err_method = 0;
X return(0);
X }
X err_count++;
X break;
X case 'C': /* CRC marker */
X if (default_err == 1 || default_err == 2) {
X mvwaddstr(win, 5, 24, "CRC");
X err_method = 1;
X return(0);
X }
X err_count++;
X break;
X case 'G': /* ymodem-g marker */
X if (default_err == 3) {
X mvwaddstr(win, 5, 24, "NONE");
X err_method = 2;
X return(0);
X }
X err_count++;
X break;
X case CAN: /* two CAN's and you're out! */
X if (getc_line(2) == CAN) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "REMOTE ABORTED");
X wrefresh(win);
X return(CANCEL);
X }
X /* fall thru... */
X default:
X err_count++;
X break;
X }
X clear_line(win, 12, 24, 1);
X waddstr(win, "BAD HEADER");
X mvwprintw(win, 10, 24, "%-2d", err_count);
X wrefresh(win);
X }
X /* failed to get it right ? */
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "TIMED OUT");
X wrefresh(win);
X return(ERROR);
X}
X
X/*
X * Send a block of data, scan the keyboard for a user abort, and check
X * the return codes from the host. Returns standard error codes or 0
X * on success.
X */
X
Xint
Xsend_block(win, blk, packet)
XWINDOW *win;
Xunsigned char *blk;
Xunsigned int packet;
X{
X int err_count;
X
X err_count = 0;
X while (err_count < MAX_ERRORS) {
X /* write the block */
X write(status->fd, (char *) blk, packet);
X /* scan the keyboard */
X if (wgetch(win) == 27) {
X beep();
X clear_line(win, 12, 24, 1);
X waddstr(win, "ABORTED");
X wrefresh(win);
X sleep(3);
X return(ABORT);
X }
X /* ymodem-g doesn't need ACKs */
X if (err_method == 2)
X return(0);
X /* wait for acknowledge */
X switch(getc_line(10)) {
X case ACK: /* Hooray!! we got it */
X return(0);
X case NAK: /* show our disappointment... */
X clear_line(win, 12, 24, 1);
X if (err_method)
X waddstr(win, "CRC FAILED");
X else
X waddstr(win, "CHECKSUM FAILED");
X err_count++;
X tot_err++;
X break;
X case CAN: /* two CAN's and you're out! */
X if (getc_line(2) == CAN) {
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "REMOTE ABORTED");
X wrefresh(win);
X return(CANCEL);
X }
X /* fall thru... */
X default:
X clear_line(win, 12, 24, 1);
X waddstr(win, "RESENDING");
X err_count++;
X tot_err++;
X break;
X }
X mvwprintw(win, 10, 24, "%-2d", err_count);
X mvwprintw(win, 11, 24, "%-3d", tot_err);
X wrefresh(win);
X }
X /* failed to get it right */
X beep();
X clear_line(win, 12, 24, 1);
X wattrstr(win, A_BOLD, "TOO MANY ERRORS");
X wrefresh(win);
X return(ERROR);
X}
SHAR_EOF
if test 10461 -ne "`wc -c < 'x_send.c'`"
then
echo shar: "error transmitting 'x_send.c'" '(should have been 10461 characters)'
fi
fi
echo shar: "extracting 'x_win.c'" '(2758 characters)'
if test -f 'x_win.c'
then
echo shar: "will not over-write existing file 'x_win.c'"
else
sed 's/^X//' << \SHAR_EOF > 'x_win.c'
X/*
X * Display the file transfer window, and invoke the transfer protocol.
X */
X
X#include <stdio.h>
X#include <curses.h>
X#include "dial_dir.h"
X#include "misc.h"
X#include "status.h"
X#include "xmodem.h"
X
Xvoid
Xxfer_win(list, up, type)
Xchar *list;
Xint up, type;
X{
X WINDOW *xf_win, *newwin();
X int ret_code, fast, my_speed;
X void xmodem_mode(), input_off(), line_set(), error_win();
X struct termio tbuf;
X
X if (status->fd == -1) {
X error_win(0, "Not currently connected to any host", NULL);
X return;
X }
X
X xf_win = newwin(15, 44, 2, 30);
X /*
X * This window should be in the non-blocking mode, so we can
X * scan the keyboard for input while transferring a file.
X */
X nodelay(xf_win, 1);
X /* basic window stuff */
X mvwaddstr(xf_win, 2, 14, "Protocol:");
X mvwaddstr(xf_win, 3, 13, "File name:");
X mvwaddstr(xf_win, 4, 13, "File size:");
X mvwaddstr(xf_win, 5, 4, "Error check method:");
X mvwaddstr(xf_win, 6, 5, "Est transfer time:");
X mvwaddstr(xf_win, 7, 11, "Block count:");
X mvwaddstr(xf_win, 8, 6, "Percent complete:");
X mvwaddstr(xf_win, 9, 5, "Bytes transferred:");
X mvwaddstr(xf_win, 10, 5, "Errors this block:");
X mvwaddstr(xf_win, 11, 5, "Total error count:");
X mvwaddstr(xf_win, 12, 10, "Last message: NONE");
X box(xf_win, '|', '-');
X
X if (up)
X mvwattrstr(xf_win, 0, 17, A_BOLD, " Uploading ");
X else
X mvwattrstr(xf_win, 0, 16, A_BOLD, " Downloading ");
X mvwaddstr(xf_win, 14, 12, " Press ESC to abort ");
X wrefresh(xf_win);
X /* fix up the terminal mode */
X input_off();
X xmodem_mode(status->fd);
X
X /*
X * Is your terminal slower than the xfer baud rate? For example:
X * I'm at home with my PC and 1200 baud modem, I call my system
X * at work so I can use their 2400 baud modems to call some other
X * system. In this case, I don't wanna spend too much time updating
X * my screen at 1200 baud, when I'm transferring the file at 2400 baud.
X */
X my_speed = 0;
X fast = 0;
X
X ioctl(0, TCGETA, &tbuf);
X /* only reasonable values are here */
X switch(tbuf.c_cflag & CBAUD) {
X case B300:
X my_speed = 300;
X break;
X case B1200:
X my_speed = 1200;
X break;
X case B2400:
X my_speed = 2400;
X break;
X case B4800:
X my_speed = 4800;
X break;
X case B9600:
X my_speed = 9600;
X break;
X case B19200:
X my_speed = 19200;
X break;
X }
X if (my_speed >= dir->baud[dir->d_cur])
X fast++;
X
X if (up)
X ret_code = send_xmodem(xf_win, list, type, fast);
X else
X ret_code = rcv_xmodem(xf_win, list, type, fast);
X
X nodelay(xf_win, 0);
X /* prompt for a key on errors */
X if (ret_code) {
X beep();
X clear_line(xf_win, 13, 9, 1);
X wattrstr(xf_win, A_BOLD, "Press any key to continue");
X wrefresh(xf_win);
X wgetch(xf_win);
X }
X werase(xf_win);
X wrefresh(xf_win);
X delwin(xf_win);
X /* undo what xmodem_mode() did */
X line_set();
X return;
X}
SHAR_EOF
if test 2758 -ne "`wc -c < 'x_win.c'`"
then
echo shar: "error transmitting 'x_win.c'" '(should have been 2758 characters)'
fi
fi
echo shar: "extracting 'xmodem.c'" '(4611 characters)'
if test -f 'xmodem.c'
then
echo shar: "will not over-write existing file 'xmodem.c'"
else
sed 's/^X//' << \SHAR_EOF > 'xmodem.c'
X/*
X * Miscellaneous routines to support the xmodem file transfer protocols.
X */
X
X#include <stdio.h>
X#include <signal.h>
X#include <termio.h>
X#include <setjmp.h>
X#include <sys/types.h>
X#include <sys/stat.h>
X#include "param.h"
X#include "status.h"
X#include "xmodem.h"
X
X/*
X * Calculate the CRC for the given buffer
X */
X
Xint
Xcalc_crc(buf, len)
Xunsigned char *buf;
Xint len;
X{
X int crc, i;
X
X crc = 0;
X while (--len >= 0) {
X /*
X * Some fancy foot work here... The algorithm looks good
X * in assembly, but in C it looks horrible!
X */
X crc = crc ^ (int) *buf++ << 8;
X for (i=0; i<8; i++) {
X if (crc & 0x8000)
X crc = crc << 1 ^ 0x1021;
X else
X crc = crc << 1;
X }
X }
X return(crc & 0xffff);
X}
X
X/*
X * Calculate the checksum for the given buffer.
X */
X
Xunsigned char
Xcalc_sum(buf, len)
Xunsigned char *buf;
Xint len;
X{
X unsigned char sum;
X
X sum = 0;
X while (--len >= 0)
X sum += *buf++;
X
X return(sum);
X}
X
X/*
X * Get a character from the line with a specified time-out period in
X * seconds. If the function times-out, it returns a -1.
X */
X
Xjmp_buf gl_jmp;
X
Xint
Xgetc_line(sec)
Xunsigned int sec;
X{
X int force_gl();
X unsigned char c;
X unsigned int alarm();
X
X signal(SIGALRM, force_gl);
X if (setjmp(gl_jmp))
X return(-1);
X
X alarm(sec);
X if (read(status->fd, (char *) &c, 1) <= 0) {
X alarm(0);
X return(-1);
X }
X alarm(0);
X return(c);
X}
Xint
Xforce_gl(dummy)
Xint dummy;
X{
X void longjmp();
X
X longjmp(gl_jmp, 1);
X}
X
X/*
X * Same as above, but reads a bunch of characters. The return code is
X * now just a success/fail indicator.
X */
X
Xjmp_buf rl_jmp;
X
Xint
Xfread_line(buf, len, sec)
Xunsigned char *buf;
Xunsigned int len, sec;
X{
X int i, force_rl();
X unsigned int alarm();
X
X signal(SIGALRM, force_rl);
X if (setjmp(rl_jmp))
X return(-1);
X
X alarm(sec);
X /*
X * Later, this will have some fine tuning to use more than
X * single character I/O.
X */
X for (i=0; i<len; i++) {
X if (read(status->fd, (char *) buf++, 1) <= 0) {
X alarm(0);
X return(-1);
X }
X }
X alarm(0);
X return(0);
X}
Xint
Xforce_rl(dummy)
Xint dummy;
X{
X void longjmp();
X
X longjmp(rl_jmp, 1);
X}
X
X/*
X * Put a character on the tty line. This serves no useful purpose other
X * than making the code look pretty.
X */
X
Xint
Xputc_line(c)
Xunsigned char c;
X{
X return(write(status->fd, (char *) &c, 1));
X}
X
X/*
X * Put the tty driver in the mode suitable for xmodem transfers.
X */
X
Xvoid
Xxmodem_mode(fd)
Xint fd;
X{
X struct termio tbuf;
X
X ioctl(fd, TCGETA, &tbuf);
X /*
X * Turn off the XON/XOFF flow control, turn off echoing, and
X * switch to 8 bit no parity. Later, the VTIME and VMIN variables
X * will be fine tuned, to allow for more efficient I/O.
X */
X tbuf.c_cc[4] = 1; /* VMIN */
X tbuf.c_cc[5] = 0; /* VTIME */
X tbuf.c_iflag = 0; /* no flow control or mapping */
X tbuf.c_oflag = 0; /* no char mapping or delays */
X tbuf.c_lflag = 0; /* no echo or signals */
X tbuf.c_cflag &= ~PARENB; /* no parity */
X tbuf.c_cflag &= ~CSIZE;
X tbuf.c_cflag |= CS8; /* 8 bit */
X
X ioctl(fd, TCSETA, &tbuf);
X ioctl(fd, TCFLSH, 2);
X return;
X}
X
X/*
X * Cancel the file transfer. Send several ^X's to the remote, followed
X * by an equal number of backspace (in case they have already aborted and
X * we're really at the command line).
X */
X
Xvoid
Xcancel_xfer()
X{
X extern char file_name[15];
X
X if (!strcmp(param->abort, "DELETE"))
X unlink(file_name);
X
X putc_line(CAN);
X putc_line(CAN);
X putc_line(CAN);
X putc_line(8);
X putc_line(8);
X putc_line(8);
X return;
X}
X
X/*
X * Shorten a file to a predetermined length. Used to remove the ^Z
X * padding from the end of files. (Heaven help us, if one day a binary
X * file actually has ^Z's as part of the end of the file).
X */
X
Xint
Xfix_length(file, len)
Xchar *file;
Xint len;
X{
X FILE *fp, *tempfp;
X int num;
X char *tempfile, *mktemp();
X unsigned char buf[BUFSIZ];
X struct stat stbuf;
X
X if (stat(file, &stbuf) < 0)
X return(1);
X /* see if we have any work to do */
X if (len >= stbuf.st_size)
X return(0);
X
X if (!(fp = fopen(file, "r")))
X return(1);
X
X /*
X * The temporary file should be in the same directory as the
X * file being received because otherwise we'd have no way of
X * guaranteeing they would be in the same file system. (Hard
X * links across different file systems aren't allowed).
X */
X tempfile = mktemp("trunXXXXXX");
X if (!(tempfp = fopen(tempfile, "w"))) {
X fclose(fp);
X return(1);
X }
X
X while(len) {
X num = (len > BUFSIZ) ? BUFSIZ : len;
X fread((char *) buf, sizeof(buf[0]), num, fp);
X fwrite((char *) buf, sizeof(buf[0]), num, tempfp);
X len -= num;
X }
X
X fclose(fp);
X fclose(tempfp);
X
X if (unlink(file) < 0)
X return(1);
X
X if (link(tempfile, file) < 0)
X return(1);
X
X if (unlink(tempfile) < 0)
X return(1);
X
X return(0);
X}
SHAR_EOF
if test 4611 -ne "`wc -c < 'xmodem.c'`"
then
echo shar: "error transmitting 'xmodem.c'" '(should have been 4611 characters)'
fi
fi
exit 0
# End of shell archive
--
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