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>
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
+ extern int errno;
pid_t new_process_group;
if (tcgetattr(scb->fd, &state->termios) < 0)
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)
+ if ((new_process_group == (pid_t)-1)
+ && (errno != ENOTTY))
return -1;
+ errno = 0;
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 (!job_control)
return 0;
- /* Need to ignore errors, at least if attach_flag is set. */
- tcsetpgrp (scb->fd, state->process_group);
- 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);
#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
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;
+ return ioctl (scb->fd, TIOCSPGRP, &state->process_group);
#endif
}
struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
int i;
+#ifdef HAVE_TERMIOS
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\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: ");
#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;
serial_t scb;
int timeout;
{
- int numfds;
-
#ifdef HAVE_SGTTY
struct timeval tv;
fd_set readfds;
while (1)
{
+ int numfds;
+
if (timeout >= 0)
numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
else
/* 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)
serial_ttystate ttystate;
int group;
{
+#if defined (HAVE_SGTTY) || defined (HAVE_TERMIOS)
((struct hardwire_ttystate *)ttystate)->process_group = group;
+#endif
return 0;
}
hardwire_readchar,
hardwire_write,
hardwire_flush_output,
+ hardwire_flush_input,
+ hardwire_send_break,
hardwire_raw,
hardwire_get_tty_state,
hardwire_set_tty_state,
{
#if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS)
/* Do all systems with termios have setpgid? I hope so. */
- retval = setpgid (0, 0);
+ /* 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)
/* Do all systems with termios have the POSIX way of identifying job
control? I hope so. */
#ifdef _POSIX_JOB_CONTROL
- /* AIX defines _POSIX_JOB_CONTROL to an empty string, so I guess
- defining _POSIX_JOB_CONTROL to 0 to mean no job control doesn't work
- (I don't have the standard handy). */
job_control = 1;
#else
job_control = sysconf (_SC_JOB_CONTROL);
#endif
+#endif /* termios */
-#else /* not 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 */
-#endif /* not termios. */
}
projects / deliverable / binutils-gdb.git / blobdiff