Usenet 1993 July/InfoMagic USENET CD-ROM July 1993.ISO/sources/unix/volume14/pcomm/part06

Internet Message Format | 1988-05-18 | 43.5 KB

Subject:  v14i104:  Dial out and terminal emulator, Part06/06
Newsgroups: comp.sources.unix
Sender: sources
Approved: [e-mail]

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