void
loop(void)
{
enum {
ST_COMMAND,
ST_TRANSPARENT
} state;
int dtr_up;
fd_set rdset, wrset;
int newbaud, newflow, newparity, newbits;
char *newflow_str, *newparity_str;
char fname[128];
int r, n;
unsigned char c;
tty_q.len = 0;
state = ST_TRANSPARENT;
dtr_up = 0;
for (;;) {
FD_ZERO(&rdset);
FD_ZERO(&wrset);
FD_SET(STI, &rdset);
FD_SET(tty_fd, &rdset);
if ( tty_q.len ) FD_SET(tty_fd, &wrset);
if (select(FD_SETSIZE, &rdset, &wrset, NULL, NULL) < 0)
fatal("select failed: %d : %s", errno, strerror(errno));
if ( FD_ISSET(STI, &rdset) ) {
/* read from terminal */
do {
n = read(STI, &c, 1);
} while (n < 0 && errno == EINTR);
if (n == 0)
fatal("stdin closed");
else if (n < 0)
fatal("read from stdin failed: %s", strerror(errno));
switch (state) {
case ST_COMMAND:
if ( c == opts.escape ) {
state = ST_TRANSPARENT;
/* pass the escape character down */
if (tty_q.len <= TTY_Q_SZ)
tty_q.buff[tty_q.len++] = c;
else
fd_printf(STO, "\x07");
break;
}
state = ST_TRANSPARENT;
switch (c) {
case KEY_EXIT:
return;
case KEY_QUIT:
term_set_hupcl(tty_fd, 0);
term_flush(tty_fd);
term_apply(tty_fd);
term_erase(tty_fd);
return;
case KEY_STATUS:
fd_printf(STO, "\r\n");
fd_printf(STO, "*** baud: %d\r\n", opts.baud);
fd_printf(STO, "*** flow: %s\r\n", opts.flow_str);
fd_printf(STO, "*** parity: %s\r\n", opts.parity_str);
fd_printf(STO, "*** databits: %d\r\n", opts.databits);
fd_printf(STO, "*** dtr: %s\r\n", dtr_up ? "up" : "down");
break;
case KEY_PULSE:
fd_printf(STO, "\r\n*** pulse DTR ***\r\n");
if ( term_pulse_dtr(tty_fd) < 0 )
fd_printf(STO, "*** FAILED\r\n");
break;
case KEY_TOGGLE:
if ( dtr_up )
r = term_lower_dtr(tty_fd);
else
r = term_raise_dtr(tty_fd);
if ( r >= 0 ) dtr_up = ! dtr_up;
fd_printf(STO, "\r\n*** DTR: %s ***\r\n",
dtr_up ? "up" : "down");
break;
case KEY_BAUD_UP:
newbaud = baud_up(opts.baud);
term_set_baudrate(tty_fd, newbaud);
tty_q.len = 0; term_flush(tty_fd);
if ( term_apply(tty_fd) >= 0 ) opts.baud = newbaud;
fd_printf(STO, "\r\n*** baud: %d ***\r\n", opts.baud);
break;
case KEY_BAUD_DN:
newbaud = baud_down(opts.baud);
term_set_baudrate(tty_fd, newbaud);
tty_q.len = 0; term_flush(tty_fd);
if ( term_apply(tty_fd) >= 0 ) opts.baud = newbaud;
fd_printf(STO, "\r\n*** baud: %d ***\r\n", opts.baud);
break;
case KEY_FLOW:
newflow = flow_next(opts.flow, &newflow_str);
term_set_flowcntrl(tty_fd, newflow);
tty_q.len = 0; term_flush(tty_fd);
if ( term_apply(tty_fd) >= 0 ) {
opts.flow = newflow;
opts.flow_str = newflow_str;
}
fd_printf(STO, "\r\n*** flow: %s ***\r\n", opts.flow_str);
break;
case KEY_PARITY:
newparity = parity_next(opts.parity, &newparity_str);
term_set_parity(tty_fd, newparity);
tty_q.len = 0; term_flush(tty_fd);
if ( term_apply(tty_fd) >= 0 ) {
opts.parity = newparity;
opts.parity_str = newparity_str;
}
fd_printf(STO, "\r\n*** parity: %s ***\r\n",
opts.parity_str);
break;
case KEY_BITS:
newbits = bits_next(opts.databits);
term_set_databits(tty_fd, newbits);
tty_q.len = 0; term_flush(tty_fd);
if ( term_apply(tty_fd) >= 0 ) opts.databits = newbits;
fd_printf(STO, "\r\n*** databits: %d ***\r\n",
opts.databits);
break;
case KEY_SEND:
fd_printf(STO, "\r\n*** file: ");
r = fd_readline(STI, STO, fname, sizeof(fname));
fd_printf(STO, "\r\n");
if ( r < -1 && errno == EINTR ) break;
if ( r <= -1 )
fatal("cannot read filename: %s", strerror(errno));
run_cmd(tty_fd, opts.send_cmd, fname, NULL);
break;
case KEY_RECEIVE:
fd_printf(STO, "*** file: ");
r = fd_readline(STI, STO, fname, sizeof(fname));
fd_printf(STO, "\r\n");
if ( r < -1 && errno == EINTR ) break;
if ( r <= -1 )
fatal("cannot read filename: %s", strerror(errno));
if ( fname[0] )
run_cmd(tty_fd, opts.send_cmd, fname, NULL);
else
run_cmd(tty_fd, opts.receive_cmd, NULL);
break;
case KEY_BREAK:
term_break(tty_fd);
fd_printf(STO, "\r\n*** break sent ***\r\n");
break;
default:
break;
}
break;
case ST_TRANSPARENT:
if ( c == opts.escape ) {
state = ST_COMMAND;
} else {
if (tty_q.len <= TTY_Q_SZ)
tty_q.buff[tty_q.len++] = c;
else
fd_printf(STO, "\x07");
}
break;
default:
assert(0);
break;
}
}
if ( FD_ISSET(tty_fd, &rdset) ) {
/* read from port */
do {
n = read(tty_fd, &c, 1);
} while (n < 0 && errno == EINTR);
if (n == 0)
fatal("term closed");
else if ( n < 0 )
fatal("read from term failed: %s", strerror(errno));
do {
n = write(STO, &c, 1);
} while ( errno == EAGAIN
|| errno == EWOULDBLOCK
|| errno == EINTR );
if ( n <= 0 )
fatal("write to stdout failed: %s", strerror(errno));
}
if ( FD_ISSET(tty_fd, &wrset) ) {
/* write to port */
do {
n = write(tty_fd, tty_q.buff, tty_q.len);
} while ( n < 0 && errno == EINTR );
if ( n <= 0 )
fatal("write to term failed: %s", strerror(errno));
memcpy(tty_q.buff, tty_q.buff + n, tty_q.len - n);
tty_q.len -= n;
}
}
}
/* Process command key. Returns non-zero if command results in picocom
exit, zero otherwise. */
int
do_command (unsigned char c)
{
static int dtr_up = 0;
int newbaud, newflow, newparity, newbits, newstopbits;
const char *xfr_cmd;
char *fname;
int r;
switch (c) {
case KEY_EXIT:
return 1;
case KEY_QUIT:
term_set_hupcl(tty_fd, 0);
term_flush(tty_fd);
term_apply(tty_fd, 1);
term_erase(tty_fd);
return 1;
case KEY_STATUS:
show_status(dtr_up);
break;
case KEY_HELP:
case KEY_KEYS:
show_keys();
break;
case KEY_PULSE:
fd_printf(STO, "\r\n*** pulse DTR ***\r\n");
if ( term_pulse_dtr(tty_fd) < 0 )
fd_printf(STO, "*** FAILED\r\n");
break;
case KEY_TOGGLE:
if ( dtr_up )
r = term_lower_dtr(tty_fd);
else
r = term_raise_dtr(tty_fd);
if ( r >= 0 ) dtr_up = ! dtr_up;
fd_printf(STO, "\r\n*** DTR: %s ***\r\n",
dtr_up ? "up" : "down");
break;
case KEY_BAUD:
case KEY_BAUD_UP:
case KEY_BAUD_DN:
if ( c== KEY_BAUD) {
newbaud = read_baud();
if ( newbaud < 0 ) {
fd_printf(STO, "*** cannot read baudrate ***\r\n");
break;
}
opts.baud = newbaud;
} else if (c == KEY_BAUD_UP) {
opts.baud = baud_up(opts.baud);
} else {
opts.baud = baud_down(opts.baud);
}
term_set_baudrate(tty_fd, opts.baud);
tty_q.len = 0; term_flush(tty_fd);
term_apply(tty_fd, 1);
newbaud = term_get_baudrate(tty_fd, NULL);
if ( opts.baud != newbaud ) {
fd_printf(STO, "\r\n*** baud: %d (%d) ***\r\n",
opts.baud, newbaud);
} else {
fd_printf(STO, "\r\n*** baud: %d ***\r\n", opts.baud);
}
set_tty_write_sz(newbaud);
break;
case KEY_FLOW:
opts.flow = flow_next(opts.flow);
term_set_flowcntrl(tty_fd, opts.flow);
tty_q.len = 0; term_flush(tty_fd);
term_apply(tty_fd, 1);
newflow = term_get_flowcntrl(tty_fd);
if ( opts.flow != newflow ) {
fd_printf(STO, "\r\n*** flow: %s (%s) ***\r\n",
flow_str[opts.flow], flow_str[newflow]);
} else {
fd_printf(STO, "\r\n*** flow: %s ***\r\n",
flow_str[opts.flow]);
}
break;
case KEY_PARITY:
opts.parity = parity_next(opts.parity);
term_set_parity(tty_fd, opts.parity);
tty_q.len = 0; term_flush(tty_fd);
term_apply(tty_fd, 1);
newparity = term_get_parity(tty_fd);
if (opts.parity != newparity ) {
fd_printf(STO, "\r\n*** parity: %s (%s) ***\r\n",
parity_str[opts.parity],
parity_str[newparity]);
} else {
fd_printf(STO, "\r\n*** parity: %s ***\r\n",
parity_str[opts.parity]);
}
break;
case KEY_BITS:
opts.databits = bits_next(opts.databits);
term_set_databits(tty_fd, opts.databits);
tty_q.len = 0; term_flush(tty_fd);
term_apply(tty_fd, 1);
newbits = term_get_databits(tty_fd);
if (opts.databits != newbits ) {
fd_printf(STO, "\r\n*** databits: %d (%d) ***\r\n",
opts.databits, newbits);
} else {
fd_printf(STO, "\r\n*** databits: %d ***\r\n",
opts.databits);
}
break;
case KEY_STOP:
opts.stopbits = stopbits_next(opts.stopbits);
term_set_stopbits(tty_fd, opts.stopbits);
tty_q.len = 0; term_flush(tty_fd);
term_apply(tty_fd, 1);
newstopbits = term_get_stopbits(tty_fd);
if (opts.stopbits != newstopbits ) {
fd_printf(STO, "\r\n*** stopbits: %d (%d) ***\r\n",
opts.stopbits, newstopbits);
} else {
fd_printf(STO, "\r\n*** stopbits: %d ***\r\n",
opts.stopbits);
}
break;
case KEY_LECHO:
opts.lecho = ! opts.lecho;
fd_printf(STO, "\r\n*** local echo: %s ***\r\n",
opts.lecho ? "yes" : "no");
break;
case KEY_SEND:
case KEY_RECEIVE:
xfr_cmd = (c == KEY_SEND) ? opts.send_cmd : opts.receive_cmd;
if ( xfr_cmd[0] == '\0' ) {
fd_printf(STO, "\r\n*** command disabled ***\r\n");
break;
}
fname = read_filename();
if (fname == NULL) {
fd_printf(STO, "*** cannot read filename ***\r\n");
break;
}
run_cmd(tty_fd, xfr_cmd, fname);
free(fname);
break;
case KEY_BREAK:
term_break(tty_fd);
fd_printf(STO, "\r\n*** break sent ***\r\n");
break;
default:
break;
}
return 0;
}
