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899 lines (798 loc) · 19.7 KB
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/*
* main.c main loop of emulator.
*
* This file is part of the minicom communications package,
* Copyright 1991-1995 Miquel van Smoorenburg.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* fmg 1/11/94 color mods
* jl 22.06.97 log it when DCD drops
* jl 02.06.98 added call duration to the "Gone offline" log line
* jl 14.06.99 moved lockfile creation to before serial port opening
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "port.h"
#include "minicom.h"
#include "intl.h"
#include "sysdep.h"
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <stdbool.h>
#ifdef SVR4_LOCKS
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mkdev.h>
#endif /* SVR4_LOCKS */
static jmp_buf albuf;
/* Compile SCCS ID into executable. */
const char *Version = VERSION;
/*
* Find out name to use for lockfile when locking tty.
*/
static char *mbasename(char *s, char *res, int reslen)
{
char *p;
if (strncmp(s, "/dev/", 5) == 0) {
/* In /dev */
strncpy(res, s + 5, reslen - 1);
res[reslen-1] = 0;
for (p = res; *p; p++)
if (*p == '/')
*p = '_';
} else {
/* Outside of /dev. Do something sensible. */
if ((p = strrchr(s, '/')) == NULL)
p = s;
else
p++;
strncpy(res, p, reslen - 1);
res[reslen-1] = 0;
}
return res;
}
/*
* Leave.
*/
void leave(const char *s)
{
if (stdwin)
mc_wclose(stdwin, 1);
if (portfd > 0) {
m_restorestate(portfd);
close(portfd);
}
lockfile_remove();
if (P_CALLIN[0])
fastsystem(P_CALLIN, NULL, NULL, NULL);
fprintf(stderr, "%s", s);
exit(1);
}
/*
* Return text describing command-key.
*/
char *esc_key(void)
{
static char buf[16];
if (!alt_override && P_ESCAPE[0] == '^' && P_ESCAPE[1] != '[') {
sprintf(buf, "CTRL-%c ", P_ESCAPE[1]);
return buf;
}
#if defined(i386) || defined(__i386__)
sprintf(buf, "ESC,");
#else
sprintf(buf, "Meta-");
#endif
return buf;
}
static void get_alrm(int dummy)
{
(void)dummy;
errno = ETIMEDOUT;
longjmp(albuf, 1);
}
#ifdef USE_SOCKET
/*
* If portfd is a socket, we try to (re)connect
*/
void term_socket_connect(void)
{
if (!portfd_is_socket || portfd_is_connected)
return;
if ((portfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
return;
if (connect(portfd, (struct sockaddr *)&portfd_sock_addr,
sizeof(portfd_sock_addr)) == -1)
term_socket_close();
else
portfd_is_connected = 1;
}
/*
* Close the connection if the socket delivers "eof" (read returns 0)
*/
void term_socket_close(void)
{
close(portfd);
portfd_is_connected = 0;
portfd = -1;
}
#endif /* USE_SOCKET */
/*
* Open the terminal.
*
* \return -1 on error, 0 on success
*/
int open_term(int doinit, int show_win_on_error, int no_msgs)
{
struct stat stt;
union {
char bytes[128];
int kermit;
} buf;
int fd, n = 0;
int pid;
#ifdef HAVE_ERRNO_H
int s_errno;
#endif
#ifdef USE_SOCKET
#define SOCKET_PREFIX "unix#"
portfd_is_socket = portfd_is_connected = 0;
if (strncmp(dial_tty, SOCKET_PREFIX, strlen(SOCKET_PREFIX)) == 0) {
portfd_is_socket = 1;
}
#endif
if (portfd_is_socket)
goto nolock;
#if !HAVE_LOCKDEV
/* First see if the lock file directory is present. */
if (P_LOCK[0] && stat(P_LOCK, &stt) == 0) {
#ifdef SVR4_LOCKS
stat(dial_tty, &stt);
sprintf(lockfile, "%s/LK.%03d.%03d.%03d",
P_LOCK, major(stt.st_dev),
major(stt.st_rdev), minor(stt.st_rdev));
#else /* SVR4_LOCKS */
snprintf(lockfile, sizeof(lockfile),
"%s/LCK..%s",
P_LOCK, mbasename(dial_tty, buf.bytes, sizeof(buf.bytes)));
#endif /* SVR4_LOCKS */
}
else
lockfile[0] = 0;
if (doinit > 0 && lockfile[0] && (fd = open(lockfile, O_RDONLY)) >= 0) {
n = read(fd, buf.bytes, 127);
close(fd);
if (n > 0) {
pid = -1;
if (n == 4)
/* Kermit-style lockfile. */
pid = buf.kermit;
else {
/* Ascii lockfile. */
buf.bytes[n] = 0;
sscanf(buf.bytes, "%d", &pid);
}
if (pid > 0 && kill((pid_t)pid, 0) < 0 &&
errno == ESRCH) {
fprintf(stderr, _("Lockfile is stale. Overriding it..\n"));
sleep(1);
unlink(lockfile);
} else
n = 0;
}
if (n == 0) {
if (stdwin)
mc_wclose(stdwin, 1);
fprintf(stderr, _("Device %s is locked.\n"), dial_tty);
return -1;
}
}
#endif
if (doinit > 0 && lockfile_create() != 0)
return -1;
nolock:
/* Run a special program to disable callin if needed. */
if (doinit > 0 && P_CALLOUT[0]) {
if (fastsystem(P_CALLOUT, NULL, NULL, NULL) < 0) {
if (stdwin)
mc_wclose(stdwin, 1);
fprintf(stderr, _("Could not setup for dial out.\n"));
lockfile_remove();
return -1;
}
}
/* Now open the tty device. */
if (setjmp(albuf) == 0) {
portfd = -1;
signal(SIGALRM, get_alrm);
alarm(20);
#ifdef USE_SOCKET
if (portfd_is_socket) {
portfd_sock_addr.sun_family = AF_UNIX;
strncpy(portfd_sock_addr.sun_path,
dial_tty + strlen(SOCKET_PREFIX),
sizeof(portfd_sock_addr.sun_path)-1);
portfd_sock_addr.sun_path[sizeof(portfd_sock_addr.sun_path)-1] = 0;
term_socket_connect();
}
#endif /* USE_SOCKET */
if (!portfd_is_socket) {
#if defined(O_NDELAY) && defined(F_SETFL)
portfd = open(dial_tty, O_RDWR|O_NDELAY|O_NOCTTY);
if (portfd >= 0) {
/* Cancel the O_NDELAY flag. */
n = fcntl(portfd, F_GETFL, 0);
fcntl(portfd, F_SETFL, n & ~O_NDELAY);
}
#else
if (portfd < 0)
portfd = open(dial_tty, O_RDWR|O_NOCTTY);
#endif
}
if (portfd >= 0) {
if (doinit > 0)
m_savestate(portfd);
port_init();
}
}
#ifdef HAVE_ERRNO_H
s_errno = errno;
#endif
alarm(0);
signal(SIGALRM, SIG_IGN);
if (portfd < 0 && !portfd_is_socket) {
if (!no_msgs) {
if (doinit > 0) {
if (stdwin)
mc_wclose(stdwin, 1);
#ifdef HAVE_ERRNO_H
fprintf(stderr, _("minicom: cannot open %s: %s\n"),
dial_tty, strerror(s_errno));
#else
fprintf(stderr, _("minicom: cannot open %s. Sorry.\n"), dial_tty);
#endif
lockfile_remove();
return -1;
}
if (show_win_on_error)
werror(_("Cannot open %s!"), dial_tty);
}
lockfile_remove();
return -1;
}
/* Set CLOCAL mode */
m_nohang(portfd);
/* Set Hangup on Close if program crashes. (Hehe) */
m_hupcl(portfd, 1);
if (doinit > 0)
m_flush(portfd);
return 0;
}
/* Function to write output. */
static void do_output(const char *s, int len)
{
char buf[256];
if (len == 0)
len = strlen(s);
if (P_PARITY[0] == 'M') {
int f;
for (f = 0; f < len && f < (int)sizeof(buf); f++)
buf[f] = *s++ | 0x80;
len = f;
s = buf;
}
int r;
int b = vt_ch_delay ? 1 : len;
while (len && (r = write(portfd, s, b)) >= 0)
{
s += r;
len -= r;
if (vt_ch_delay)
usleep(vt_ch_delay * 1000);
else
b = len;
}
}
/* Function to handle keypad mode switches. */
static void kb_handler(int a, int b)
{
cursormode = b;
keypadmode = a;
curs_status();
}
/*
* Initialize screen and status line.
*/
void init_emul(int type, int do_init)
{
int x = -1, y = -1;
char attr = 0;
int maxy;
int ypos;
if (st) {
mc_wclose(st, 1);
tempst = 0;
st = NULL;
}
if (us) {
x = us->curx;
y = us->cury;
attr = us->attr;
mc_wclose(us, 0);
}
/* See if we have space for a fixed status line */
maxy = LINES - 1;
if ((use_status || LINES > 24) &&
P_STATLINE[0] == 'e') {
if (use_status) {
ypos = LINES;
maxy = LINES - 1;
} else {
ypos = LINES - 1;
maxy = LINES - 2;
}
st = mc_wopen(0, ypos, COLS - 1, ypos, BNONE,
st_attr, sfcolor, sbcolor, 1, 0, 1);
mc_wredraw(st, 1);
}
/* MARK updated 02/17/95 - Customizable size for history buffer */
num_hist_lines = atoi(P_HISTSIZE);
if (num_hist_lines < 0)
num_hist_lines = 0;
if (num_hist_lines > 5000)
num_hist_lines = 5000;
/* Open a new main window, and define the configured history buffer size. */
us = mc_wopen(0, 0, COLS - 1, maxy,
BNONE, XA_NORMAL, tfcolor, tbcolor, 1, num_hist_lines, 0);
if (x >= 0) {
mc_wlocate(us, x, y);
mc_wsetattr(us, attr);
}
us->autocr = 0;
us->wrap = wrapln;
terminal = type;
lines = LINES - (st != NULL);
cols = COLS;
/* Install and reset the terminal emulator. */
if (do_init) {
vt_install(do_output, kb_handler, us);
vt_init(type, tfcolor, tbcolor, us->wrap, addlf, addcr);
} else
vt_pinit(us, -1, -1);
if (st)
show_status();
}
/*
* Locate the cursor at the correct position in
* the user screen.
*/
static void ret_csr(void)
{
mc_wlocate(us, us->curx, us->cury);
mc_wflush();
}
/*
* Show baudrate, parity etc.
*/
void mode_status(void)
{
if (st) { /* if swich off status line - NOT print !!! (vlk@st.simbirsk.su) */
mc_wlocate(st, 20, 0);
if (portfd_is_socket) {
mc_wprintf(st, "unix-socket");
} else {
if (P_SHOWSPD[0] == 'l')
mc_wprintf(st, "%6ld %s%s%s", linespd, P_BITS, P_PARITY, P_STOPB);
else
mc_wprintf(st, "%6.6s %s%s%s", P_BAUDRATE, P_BITS, P_PARITY, P_STOPB);
}
ret_csr();
}
}
/*
* Show offline or online time.
* If real dcd is not supported, Online and Offline will be
* shown in capitals.
*/
void time_status(bool time_update_only)
{
if (!st)
return;
if (time_update_only && disable_online_time)
return;
mc_wlocate(st, 63, 0);
if (disable_online_time)
{
char b[20];
mc_wprintf(st, " %s", mbasename(P_PORT, b, sizeof(b)));
}
else
{
if (online < 0)
mc_wprintf(st, " %12.12s ", P_HASDCD[0] == 'Y' ? _("Offline") : _("OFFLINE"));
else
mc_wprintf(st, " %s %02ld:%02ld", P_HASDCD[0] == 'Y' ? _("Online") : _("ONLINE"),
online / 3600, (online / 60) % 60);
}
ret_csr();
}
/*
* Show in which mode the cursor keys are (normal or application)
*/
void curs_status(void)
{
if (!st)
return;
mc_wlocate(st, 33, 0);
mc_wprintf(st, cursormode == NORMAL ? "NOR" : "APP");
ret_csr();
}
static char status_message[80];
static int status_display_msg_until;
static int status_message_showing;
void status_set_display(const char *text, int duration_s)
{
time_t t;
unsigned l;
strncpy(status_message, text, sizeof(status_message));
status_message[sizeof(status_message) - 1] = 0;
l = strlen(status_message);
for (; l < sizeof(status_message) - 1; ++l)
status_message[l] = ' ';
if (duration_s == 0)
duration_s = 2;
time(&t);
status_display_msg_until = duration_s + t;
status_message_showing = 1;
}
static void status_display_message(void)
{
if (!st)
return;
mc_wlocate(st, 0, 0);
mc_wprintf(st, " %s", status_message);
ret_csr();
}
time_t old_online = -2;
/*
* Update the online time.
*/
static void update_status_time(void)
{
time_t now;
time(&now);
if (status_message_showing) {
if (now > status_display_msg_until) {
/* time over for status message, restore standard status line */
status_message_showing = 0;
if (st)
show_status();
} else
status_display_message();
}
if (old_online == online || online <= (old_online + 59))
return;
if (P_LOGCONN[0] == 'Y' && old_online >= 0 && online < 0)
do_log(_("Gone offline (%ld:%02ld:%02ld)"),
old_online / 3600, (old_online / 60) % 60, old_online % 60);
old_online = online;
if (!status_message_showing)
time_status(true);
mc_wflush();
}
/**
* Get status of device. It might happen that the device disappears (e.g.
* due to a USB-serial unplug).
*
* \return 1 if device seems ok, 0 if it seems not available
*/
static int get_device_status(int fd)
{
struct termios t;
if (fd < 0)
return 0;
if (portfd_is_socket && portfd_is_connected)
return 1;
return !tcgetattr(fd, &t);
}
/* Update the timer display. This can also be called from updown.c */
void timer_update(void)
{
static time_t t1, start;
int dcd_support = P_HASDCD[0] == 'Y';
/* See if we're online. */
if ((!dcd_support && bogus_dcd)
|| (dcd_support && m_getdcd(portfd) == 1)) {
/* We are online at the moment. */
if (online < 0) {
/* This was a transition from off to online */
time(&start);
t1 = start;
>
#ifdef _DCDFLOW
/* DCD has gotten high, we can turn on hw flow control */
if (P_HASRTS[0] == 'Y')
m_sethwf(portfd, 1);
#endif
}
} else {
/* We are offline at the moment. */
#ifdef _DCDFLOW
if (online >= 0) {
/* DCD has dropped, turn off hw flow control. */
m_sethwf(portfd, 0);
}
#endif
if (online >= 0 && old_online >= 0) {
/* First update the timer for call duration.. */
time(&t1);
- start;
}
/* ..and THEN notify that we are now offline */
>
}
/* Update online time */
if (online >= 0) {
time(&t1);
- start;
}
update_status_time();
}
/*
* Show the status line
*/
void show_status(void)
{
st->direct = 0;
mc_wlocate(st, 0, 0);
mc_wprintf(st,
_(" %7.7sZ for help | | | Minicom %-6.6s | | "),
esc_key(), VERSION);
mode_status();
time_status(false);
curs_status();
mc_wlocate(st, 56, 0);
switch(terminal) {
case VT100:
mc_wputs(st, "VT102");
break;
case ANSI:
mc_wputs(st, "ANSI");
break;
}
mc_wredraw(st, 1);
ret_csr();
}
/*
* Show the name of the script running now.
*/
void scriptname(const char *s)
{
if (st == NULL)
return;
mc_wlocate(st, 39, 0);
if (*s == 0)
mc_wprintf(st, "Minicom %-6.6s", VERSION);
else
mc_wprintf(st, "script %-7.7s", s);
ret_csr();
}
/*
* Show status line temporarily
*/
static void showtemp(void)
{
if (st)
return;
st = mc_wopen(0, LINES - 1, COLS - 1, LINES - 1,
BNONE, st_attr, sfcolor, sbcolor, 1, 0, 1);
show_status();
tempst = 1;
}
/*
* The main terminal loop:
* - If there are characters received send them
* to the screen via the appropriate translate function.
*/
int do_terminal(void)
{
char buf[128];
int buf_offset = 0;
int c;
int x;
int blen;
int zauto = 0;
static const char zsig[] = "**\030B00";
int zpos = 0;
const char *s;
dirflush = 0;
WIN *error_on_open_window = NULL;
dirty_goto:
/* Show off or online time */
update_status_time();
/* If the status line was shown temporarily, delete it again. */
if (tempst) {
tempst = 0;
mc_wclose(st, 1);
st = NULL;
}
/* Auto Zmodem? */
if (P_PAUTO[0] >= 'A' && P_PAUTO[0] <= 'Z')
zauto = P_PAUTO[0];
/* Set the terminal modes */
setcbreak(2); /* Raw, no echo */
keyboard(KSTART, 0);
/* Main loop */
while (1) {
/* See if window size changed */
if (size_changed) {
size_changed = 0;
wrapln = us->wrap;
/* I got the resize code going again! Yeah! */
mc_wclose(us, 0);
us = NULL;
if (st)
mc_wclose(st, 0);
st = NULL;
mc_wclose(stdwin, 0);
if (win_init(tfcolor, tbcolor, XA_NORMAL) < 0)
leave(_("Could not re-initialize window system."));
/* Set the terminal modes */
setcbreak(2); /* Raw, no echo */
init_emul(terminal, 0);
}
/* Update the timer. */
timer_update();
/* check if device is ok, if not, try to open it */
if (!get_device_status(portfd_connected)) {
/* Ok, it's gone, most probably someone unplugged the USB-serial, we
* need to free the FD so that a replug can get the same device
* filename, open it again and be back */
int reopen = portfd == -1;
close(portfd);
lockfile_remove();
portfd = -1;
if (open_term(reopen, reopen, 1) < 0) {
if (!error_on_open_window)
error_on_open_window = mc_tell(_("Cannot open %s!"), dial_tty);
} else {
if (error_on_open_window) {
mc_wclose(error_on_open_window, 1);
error_on_open_window = NULL;
}
}
}
/* Check for I/O or timer. */
x = check_io(portfd_connected, 0, 1000,
buf + buf_offset, sizeof(buf) - buf_offset, &blen);
blen += buf_offset;
buf_offset = 0;
/* Data from the modem to the screen. */
if ((x & 1) == 1) {
char obuf[sizeof(buf)];
char *ptr;
if (using_iconv()) {
char *otmp = obuf;
size_t output_len = sizeof(obuf);
size_t input_len = blen;
ptr = buf;
do_iconv(&ptr, &input_len, &otmp, &output_len);
// something happened at all?
if (output_len < sizeof(obuf))
{
if (input_len)
{ // something remained, we need to adapt buf accordingly
memmove(buf, ptr, input_len);
buf_offset = input_len;
}
blen = sizeof(obuf) - output_len;
ptr = obuf;
}
else
ptr = buf;
} else {
ptr = buf;
}
while (blen-- > 0) {
/* Auto zmodem detect */
if (zauto) {
if (zsig[zpos] == *ptr)
zpos++;
else
zpos = 0;
}
if (P_PARITY[0] == 'M' || P_PARITY[0] == 'S')
*ptr &= 0x7f;
if (display_hex) {
unsigned char c = *ptr++;
unsigned char u = c >> 4;
c &= 0xf;
vt_out(u > 9 ? 'a' + (u - 10) : '0' + u);
vt_out(c > 9 ? 'a' + (c - 10) : '0' + c);
vt_out(' ');
} else
vt_out(*ptr++);
if (zauto && zsig[zpos] == 0) {
dirflush = 1;
keyboard(KSTOP, 0);
updown('D', zauto - 'A');
dirflush = 0;
zpos = 0;
blen = 0;
goto dirty_goto;
}
}
mc_wflush();
}
/* Read from the keyboard and send to modem. */
if ((x & 2) == 2) {
/* See which key was pressed. */
c = keyboard(KGETKEY, 0);
if (c == EOF)
return EOF;
if (c < 0) /* XXX - shouldn't happen */
c += 256;
/* Was this a command key? */
if ((escape == 128 && c > 224 && c < 252) ||
(escape != 27 && c == escape) ||
(c > K_META)) {
/* Stop keyserv process if we have it. */
keyboard(KSTOP, 0);
/* Show status line temporarily */
showtemp();
if (c == escape) /* CTRL A */
c = keyboard(KGETKEY, 0);
/* Restore keyboard modes */
setcbreak(1); /* Cbreak, no echo */
if (c > K_META)
c -= K_META;
if (c > 128)
c -= 128;
if (c > ' ') {
dirflush = 1;
m_flush(0);
return c;
}
/* CTRLA - CTRLA means send one CTRLA */
#if 0
write(portfd, &c, 1);
#else
vt_send(c);
#endif
goto dirty_goto;
}
/* No, just a key to be sent. */
if (c >= K_F1 && c <= K_F10 && P_MACENAB[0] == 'Y') {
s = "";
switch(c) {
case K_F1: s = P_MAC1; break;
case K_F2: s = P_MAC2; break;
case K_F3: s = P_MAC3; break;
case K_F4: s = P_MAC4; break;
case K_F5: s = P_MAC5; break;
case K_F6: s = P_MAC6; break;
case K_F7: s = P_MAC7; break;
case K_F8: s = P_MAC8; break;
case K_F9: s = P_MAC9; break;
case K_F10: s = P_MAC10; break;
}
if (*s)
mputs(s, 1);
else
vt_send(c);
} else
vt_send(c);
}
}
}
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