/* Serial interface for local (hardwired) serial ports on Un*x like systems
- Copyright 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994 Free Software Foundation, Inc.
This file is part of GDB.
struct hardwire_ttystate
{
struct termios termios;
- pid_t process_group;
};
-#endif
+#endif /* termios */
#ifdef HAVE_TERMIO
#include <termio.h>
+/* It is believed that all systems which have added job control to SVR3
+ (e.g. sco) have also added termios. Even if not, trying to figure out
+ all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty
+ bewildering. So we don't attempt it. */
+
struct hardwire_ttystate
{
struct termio termio;
- int process_group;
};
-#endif
+#endif /* termio */
#ifdef HAVE_SGTTY
/* Needed for the code which uses select(). We would include <sys/select.h>
struct ltchars ltc;
/* Line discipline flags. */
int lmode;
-
-#ifdef SHORT_PGRP
- /* This is only used for the ultra. Does it have pid_t? */
- short process_group;
-#else
- int process_group;
-#endif
};
-#endif
+#endif /* sgtty */
static int hardwire_open PARAMS ((serial_t scb, const char *name));
static void hardwire_raw PARAMS ((serial_t scb));
static int rate_to_code PARAMS ((int rate));
static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate));
static int hardwire_write PARAMS ((serial_t scb, const char *str, int len));
-static void hardwire_restore PARAMS ((serial_t scb));
+/* FIXME: static void hardwire_restore PARAMS ((serial_t scb)); */
static void hardwire_close PARAMS ((serial_t scb));
static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
struct hardwire_ttystate *state;
{
#ifdef HAVE_TERMIOS
- pid_t new_process_group;
+ extern int errno;
if (tcgetattr(scb->fd, &state->termios) < 0)
return -1;
- if (!job_control)
- return 0;
-
- new_process_group = tcgetpgrp (scb->fd);
- if (new_process_group == (pid_t)-1)
- return -1;
- state->process_group = new_process_group;
return 0;
#endif
#ifdef HAVE_TERMIO
if (ioctl (scb->fd, TCGETA, &state->termio) < 0)
return -1;
-
- if (!job_control)
- return 0;
-
- return ioctl (scb->fd, TIOCGPGRP, &state->process_group);
+ return 0;
#endif
#ifdef HAVE_SGTTY
if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0)
return -1;
- if (!job_control)
- return 0;
-
- return ioctl (scb->fd, TIOCGPGRP, &state->process_group);
+ return 0;
#endif
}
if (tcsetattr(scb->fd, TCSANOW, &state->termios) < 0)
return -1;
- if (!job_control)
- return 0;
-
- /* Need to ignore errors, at least if attach_flag is set. */
- tcsetpgrp (scb->fd, state->process_group);
return 0;
#endif
#ifdef HAVE_TERMIO
if (ioctl (scb->fd, TCSETA, &state->termio) < 0)
return -1;
-
- if (!job_control)
- return 0;
-
- /* Need to ignore errors, at least if attach_flag is set. */
- ioctl (scb->fd, TIOCSPGRP, &state->process_group);
return 0;
#endif
#ifdef HAVE_SGTTY
if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0)
return -1;
+ if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0)
+ return -1;
- if (!job_control)
- return 0;
-
- /* Need to ignore errors, at least if attach_flag is set. */
- ioctl (scb->fd, TIOCSPGRP, &state->process_group);
return 0;
#endif
}
serial_ttystate new_ttystate;
serial_ttystate old_ttystate;
{
- struct hardwire_ttystate new_state =
- *(struct hardwire_ttystate *)new_ttystate;
+ struct hardwire_ttystate new_state;
struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate;
-#ifdef HAVE_TERMIOS
- /* I'm not sure whether this is necessary; the manpage makes no mention
- of discarding input when switching to/from ICANON. */
- if (state->termios.c_lflag & ICANON)
- new_state.termios.c_lflag |= ICANON;
- else
- new_state.termios.c_lflag &= ~ICANON;
-#endif
+ new_state = *(struct hardwire_ttystate *)new_ttystate;
-#ifdef HAVE_TERMIO
- /* I'm not sure whether this is necessary; the manpage makes no mention
- of discarding input when switching to/from ICANON. */
- if (state->termio.c_lflag & ICANON)
- new_state.termio.c_lflag |= ICANON;
- else
- new_state.termio.c_lflag &= ~ICANON;
-#endif
+ /* Don't change in or out of raw mode; we don't want to flush input.
+ termio and termios have no such restriction; for them flushing input
+ is separate from setting the attributes. */
#ifdef HAVE_SGTTY
if (state->sgttyb.sg_flags & RAW)
struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
int i;
- printf_filtered ("Process group = %d\n", state->process_group);
-
#ifdef HAVE_TERMIOS
printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
state->termios.c_iflag, state->termios.c_oflag);
- printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
- state->termios.c_cflag, state->termios.c_lflag,
- state->termios.c_line);
+ printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x\n",
+ state->termios.c_cflag, state->termios.c_lflag);
+#if 0
+ /* This not in POSIX, and is not really documented by those systems
+ which have it (at least not Sun). */
+ printf_filtered ("c_line = 0x%x.\n", state->termios.c_line);
+#endif
printf_filtered ("c_cc: ");
for (i = 0; i < NCCS; i += 1)
printf_filtered ("0x%x ", state->termios.c_cc[i]);
#endif
}
+static int
+hardwire_flush_input (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcflush (scb->fd, TCIFLUSH);
+#endif
+
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCFLSH, 0);
+#endif
+
+#ifdef HAVE_SGTTY
+ /* This flushes both input and output, but we can't do better. */
+ return ioctl (scb->fd, TIOCFLUSH, 0);
+#endif
+}
+
+static int
+hardwire_send_break (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcsendbreak (scb->fd, 0);
+#endif
+
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCSBRK, 0);
+#endif
+
+#ifdef HAVE_SGTTY
+ {
+ int status;
+ struct timeval timeout;
+
+ status = ioctl (scb->fd, TIOCSBRK, 0);
+
+ /* Can't use usleep; it doesn't exist in BSD 4.2. */
+ /* Note that if this select() is interrupted by a signal it will not wait
+ the full length of time. I think that is OK. */
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 250000;
+ select (0, 0, 0, 0, &timeout);
+ status = ioctl (scb->fd, TIOCCBRK, 0);
+ return status;
+ }
+#endif
+}
+
static void
hardwire_raw(scb)
serial_t scb;
struct hardwire_ttystate state;
if (get_tty_state(scb, &state))
- fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
+ fprintf_unfiltered(gdb_stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
#ifdef HAVE_TERMIOS
state.termios.c_iflag = 0;
state.termios.c_oflag = 0;
state.termios.c_lflag = 0;
state.termios.c_cflag &= ~(CSIZE|PARENB);
- state.termios.c_cflag |= CS8;
+ state.termios.c_cflag |= CLOCAL | CS8;
state.termios.c_cc[VMIN] = 0;
state.termios.c_cc[VTIME] = 0;
#endif
state.termio.c_oflag = 0;
state.termio.c_lflag = 0;
state.termio.c_cflag &= ~(CSIZE|PARENB);
- state.termio.c_cflag |= CS8;
+ state.termio.c_cflag |= CLOCAL | CS8;
state.termio.c_cc[VMIN] = 0;
state.termio.c_cc[VTIME] = 0;
#endif
scb->current_timeout = 0;
if (set_tty_state (scb, &state))
- fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
+ fprintf_unfiltered(gdb_stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
}
/* Wait for input on scb, with timeout seconds. Returns 0 on success,
serial_t scb;
int timeout;
{
- int numfds;
+ scb->timeout_remaining = 0;
#ifdef HAVE_SGTTY
- struct timeval tv;
- fd_set readfds;
-
- FD_ZERO (&readfds);
+ {
+ struct timeval tv;
+ fd_set readfds;
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
+ FD_ZERO (&readfds);
- FD_SET(scb->fd, &readfds);
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
- while (1)
- {
- if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
- else
- numfds = select(scb->fd+1, &readfds, 0, 0, 0);
-
- if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else if (errno == EINTR)
- continue;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
+ FD_SET(scb->fd, &readfds);
- return 0;
- }
+ while (1)
+ {
+ int numfds;
+ if (timeout >= 0)
+ numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
+ else
+ numfds = select(scb->fd+1, &readfds, 0, 0, 0);
+
+ if (numfds <= 0)
+ if (numfds == 0)
+ return SERIAL_TIMEOUT;
+ else if (errno == EINTR)
+ continue;
+ else
+ return SERIAL_ERROR; /* Got an error from select or poll */
+
+ return 0;
+ }
+ }
#endif /* HAVE_SGTTY */
#if defined HAVE_TERMIO || defined HAVE_TERMIOS
if (timeout == scb->current_timeout)
return 0;
+ scb->current_timeout = timeout;
+
{
struct hardwire_ttystate state;
if (get_tty_state(scb, &state))
- fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
+ fprintf_unfiltered(gdb_stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
#ifdef HAVE_TERMIOS
- state.termios.c_cc[VTIME] = timeout * 10;
+ if (timeout < 0)
+ {
+ /* No timeout. */
+ state.termios.c_cc[VTIME] = 0;
+ state.termios.c_cc[VMIN] = 1;
+ }
+ else
+ {
+ state.termios.c_cc[VMIN] = 0;
+ state.termios.c_cc[VTIME] = timeout * 10;
+ if (state.termios.c_cc[VTIME] != timeout * 10)
+ {
+
+ /* If c_cc is an 8-bit signed character, we can't go
+ bigger than this. If it is always unsigned, we could use
+ 25. */
+
+ scb->current_timeout = 12;
+ state.termios.c_cc[VTIME] = scb->current_timeout * 10;
+ scb->timeout_remaining = timeout - scb->current_timeout;
+ }
+ }
#endif
#ifdef HAVE_TERMIO
- state.termio.c_cc[VTIME] = timeout * 10;
+ if (timeout < 0)
+ {
+ /* No timeout. */
+ state.termio.c_cc[VTIME] = 0;
+ state.termio.c_cc[VMIN] = 1;
+ }
+ else
+ {
+ state.termio.c_cc[VMIN] = 0;
+ state.termio.c_cc[VTIME] = timeout * 10;
+ if (state.termio.c_cc[VTIME] != timeout * 10)
+ {
+ /* If c_cc is an 8-bit signed character, we can't go
+ bigger than this. If it is always unsigned, we could use
+ 25. */
+
+ scb->current_timeout = 12;
+ state.termio.c_cc[VTIME] = scb->current_timeout * 10;
+ scb->timeout_remaining = timeout - scb->current_timeout;
+ }
+ }
#endif
- scb->current_timeout = timeout;
-
if (set_tty_state (scb, &state))
- fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
+ fprintf_unfiltered(gdb_stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
return 0;
}
/* Read a character with user-specified timeout. TIMEOUT is number of seconds
to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if successful. Returns -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
+ char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line
+ dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */
static int
hardwire_readchar(scb, timeout)
if (scb->bufcnt-- > 0)
return *scb->bufp++;
- status = wait_for(scb, timeout);
-
- if (status < 0)
- return status;
-
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
-
- if (scb->bufcnt <= 0)
- if (scb->bufcnt == 0)
- return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
- distinguish between EOF & timeouts
- someday] */
- else
- return SERIAL_ERROR; /* Got an error from read */
-
- scb->bufcnt--;
- scb->bufp = scb->buf;
- return *scb->bufp++;
+ while (1)
+ {
+ status = wait_for (scb, timeout);
+
+ if (status < 0)
+ return status;
+
+ scb->bufcnt = read (scb->fd, scb->buf, BUFSIZ);
+
+ if (scb->bufcnt <= 0)
+ {
+ if (scb->bufcnt == 0)
+ {
+ /* Zero characters means timeout (it could also be EOF, but
+ we don't (yet at least) distinguish). */
+ if (scb->timeout_remaining > 0)
+ {
+ timeout = scb->timeout_remaining;
+ continue;
+ }
+ else
+ return SERIAL_TIMEOUT;
+ }
+ else if (errno == EINTR)
+ continue;
+ else
+ return SERIAL_ERROR; /* Got an error from read */
+ }
+
+ scb->bufcnt--;
+ scb->bufp = scb->buf;
+ return *scb->bufp++;
+ }
}
#ifndef B19200
return set_tty_state (scb, &state);
}
-static int
-hardwire_set_process_group (scb, ttystate, group)
- serial_t scb;
- serial_ttystate ttystate;
- int group;
-{
- ((struct hardwire_ttystate *)ttystate)->process_group = group;
- return 0;
-}
-
static int
hardwire_write(scb, str, len)
serial_t scb;
hardwire_readchar,
hardwire_write,
hardwire_flush_output,
+ hardwire_flush_input,
+ hardwire_send_break,
hardwire_raw,
hardwire_get_tty_state,
hardwire_set_tty_state,
hardwire_print_tty_state,
hardwire_noflush_set_tty_state,
hardwire_setbaudrate,
- hardwire_set_process_group
};
-int job_control;
-#if defined (HAVE_TERMIOS)
-#include <unistd.h>
-#endif
-
-/* This is here because this is where we figure out whether we (probably)
- have job control. Just using job_control only does part of it because
- setpgid or setpgrp might not exist on a system without job control.
- It might be considered misplaced (on the other hand, process groups and
- job control are closely related to ttys).
-
- For a more clean implementation, in libiberty, put a setpgid which merely
- calls setpgrp and a setpgrp which does nothing (any system with job control
- will have one or the other). */
-int
-gdb_setpgid ()
-{
- int retval = 0;
- if (job_control)
- {
-#if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS)
- /* Do all systems with termios have setpgid? I hope so. */
- retval = setpgid (0, 0);
-#else
-#if defined (TIOCGPGRP)
-#if defined(USG) && !defined(SETPGRP_ARGS)
- retval = setpgrp ();
-#else
- retval = setpgrp (getpid (), getpid ());
-#endif /* USG */
-#endif /* TIOCGPGRP. */
-#endif /* NEED_POSIX_SETPGID */
- }
- return retval;
-}
-
void
_initialize_ser_hardwire ()
{
serial_add_interface (&hardwire_ops);
-
- /* OK, figure out whether we have job control. */
-
-#if defined (HAVE_TERMIOS)
- /* Do all systems with termios have the POSIX way of identifying job
- control? I hope so. */
-#ifdef _POSIX_JOB_CONTROL
- job_control = _POSIX_JOB_CONTROL;
-#else
- job_control = sysconf (_SC_JOB_CONTROL);
-#endif
-
-#else /* not termios. */
-
-#ifdef TIOCGPGRP
- job_control = 1;
-#else
- job_control = 0;
-#endif /* TIOCGPGRP */
-
-#endif /* not termios. */
}
projects / deliverable / binutils-gdb.git / blobdiff