/* 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 /* termios */
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 /* sgtty */
{
#ifdef HAVE_TERMIOS
extern int errno;
- pid_t new_process_group;
if (tcgetattr(scb->fd, &state->termios) < 0)
return -1;
- if (!job_control)
- return 0;
-
- /* Apparently, if a tty has no process group, then tcgetpgrp returns -1 with
- errno == 0. In this case, set the process group to -1 so that we know to
- omit resetting it later. */
- new_process_group = tcgetpgrp (scb->fd);
- if ((new_process_group == (pid_t)-1)
- && (errno != ENOTTY))
- return -1;
- errno = 0;
- state->process_group = new_process_group;
return 0;
#endif
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;
-
- /* If the tty had no process group before, then do not reset it. */
- if (state->process_group == -1)
- return 0;
- else
- return tcsetpgrp (scb->fd, state->process_group);
+ return 0;
#endif
#ifdef HAVE_TERMIO
#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;
-
- return ioctl (scb->fd, TIOCSPGRP, &state->process_group);
+ return 0;
#endif
}
new_state = *(struct hardwire_ttystate *)new_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
-
-#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)
int i;
#ifdef HAVE_TERMIOS
- printf_filtered ("Process group = %d\n", state->process_group);
-
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\n",
#endif
#ifdef HAVE_SGTTY
- printf_filtered ("Process group = %d\n", state->process_group);
-
printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags);
printf_filtered ("tchars: ");
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;
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;
{
-#ifdef HAVE_SGTTY
- struct timeval tv;
- fd_set readfds;
+ scb->timeout_remaining = 0;
- FD_ZERO (&readfds);
+#ifdef HAVE_SGTTY
+ {
+ 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)
- {
- 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 */
+ 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;
}
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
+ 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;
-{
-#if defined (HAVE_SGTTY) || defined (HAVE_TERMIOS)
- ((struct hardwire_ttystate *)ttystate)->process_group = group;
-#endif
- return 0;
-}
-
static int
hardwire_write(scb, str, len)
serial_t scb;
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. */
- /* setpgid (0, 0) is supposed to work and mean the same thing as
- this, but on Ultrix 4.2A it fails with EPERM (and
- setpgid (getpid (), getpid ()) succeeds). */
- retval = setpgid (getpid (), getpid ());
-#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 = 1;
-#else
- job_control = sysconf (_SC_JOB_CONTROL);
-#endif
-#endif /* termios */
-
-#ifdef HAVE_TERMIO
- /* See comment at top of file about trying to support process groups
- with termio. */
- job_control = 0;
-#endif /* termio */
-
-#ifdef HAVE_SGTTY
-#ifdef TIOCGPGRP
- job_control = 1;
-#else
- job_control = 0;
-#endif /* TIOCGPGRP */
-#endif /* sgtty */
-
}
projects / deliverable / binutils-gdb.git / blobdiff