#include "serial.h"
#include <fcntl.h>
#include <sys/types.h>
-#include <sys/time.h>
#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
#define HAVE_SGTTY
#ifdef HAVE_TERMIOS
#include <termios.h>
#include <unistd.h>
-#include <poll.h>
-#endif
+
+struct hardwire_ttystate
+{
+ struct termios termios;
+ pid_t process_group;
+};
+#endif /* termios */
+
#ifdef HAVE_TERMIO
#include <termio.h>
-#include <poll.h>
-#endif
+
+/* 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;
+};
+#endif /* termio */
+
#ifdef HAVE_SGTTY
+/* Needed for the code which uses select(). We would include <sys/select.h>
+ too if it existed on all systems. */
+#include <sys/time.h>
+
#include <sgtty.h>
+
+struct hardwire_ttystate
+{
+ struct sgttyb sgttyb;
+ struct tchars tc;
+ 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 */
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));
+static serial_ttystate hardwire_get_tty_state PARAMS ((serial_t scb));
+static int hardwire_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
/* Open up a real live device for serial I/O */
return 0;
}
+static int
+get_tty_state(scb, state)
+ serial_t scb;
+ struct hardwire_ttystate *state;
+{
+#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
+
+#ifdef HAVE_TERMIO
+ if (ioctl (scb->fd, TCGETA, &state->termio) < 0)
+ return -1;
+ return 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0)
+ return -1;
+
+ if (!job_control)
+ return 0;
+
+ return ioctl (scb->fd, TIOCGPGRP, &state->process_group);
+#endif
+}
+
+static int
+set_tty_state(scb, state)
+ serial_t scb;
+ struct hardwire_ttystate *state;
+{
+#ifdef HAVE_TERMIOS
+ 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);
+#endif
+
+#ifdef HAVE_TERMIO
+ if (ioctl (scb->fd, TCSETA, &state->termio) < 0)
+ return -1;
+ return 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0)
+ return -1;
+
+ if (!job_control)
+ return 0;
+
+ return ioctl (scb->fd, TIOCSPGRP, &state->process_group);
+#endif
+}
+
+static serial_ttystate
+hardwire_get_tty_state(scb)
+ serial_t scb;
+{
+ struct hardwire_ttystate *state;
+
+ state = (struct hardwire_ttystate *)xmalloc(sizeof *state);
+
+ if (get_tty_state(scb, state))
+ return NULL;
+
+ return (serial_ttystate)state;
+}
+
+static int
+hardwire_set_tty_state(scb, ttystate)
+ serial_t scb;
+ serial_ttystate ttystate;
+{
+ struct hardwire_ttystate *state;
+
+ state = (struct hardwire_ttystate *)ttystate;
+
+ return set_tty_state(scb, state);
+}
+
+static int
+hardwire_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
+ serial_t scb;
+ serial_ttystate new_ttystate;
+ serial_ttystate old_ttystate;
+{
+ struct hardwire_ttystate new_state;
+ struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate;
+
+ 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
+
+#ifdef HAVE_SGTTY
+ if (state->sgttyb.sg_flags & RAW)
+ new_state.sgttyb.sg_flags |= RAW;
+ else
+ new_state.sgttyb.sg_flags &= ~RAW;
+
+ /* I'm not sure whether this is necessary; the manpage just mentions
+ RAW not CBREAK. */
+ if (state->sgttyb.sg_flags & CBREAK)
+ new_state.sgttyb.sg_flags |= CBREAK;
+ else
+ new_state.sgttyb.sg_flags &= ~CBREAK;
+#endif
+
+ return set_tty_state (scb, &new_state);
+}
+
static void
-hardwire_raw(scb)
+hardwire_print_tty_state (scb, ttystate)
serial_t scb;
+ serial_ttystate ttystate;
{
+ struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
+ int i;
+
#ifdef HAVE_TERMIOS
- struct termios 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",
+ 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]);
+ printf_filtered ("\n");
+#endif
- if (tcgetattr(scb->fd, &termios))
- {
- fprintf(stderr, "tcgetattr failed: %s\n", safe_strerror(errno));
- }
+#ifdef HAVE_TERMIO
+ printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ state->termio.c_iflag, state->termio.c_oflag);
+ printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
+ state->termio.c_cflag, state->termio.c_lflag,
+ state->termio.c_line);
+ printf_filtered ("c_cc: ");
+ for (i = 0; i < NCC; i += 1)
+ printf_filtered ("0x%x ", state->termio.c_cc[i]);
+ printf_filtered ("\n");
+#endif
- termios.c_iflag = 0;
- termios.c_oflag = 0;
- termios.c_lflag = 0;
- termios.c_cflag &= ~(CSIZE|PARENB);
- termios.c_cflag |= CS8;
- termios.c_cc[VMIN] = 0;
- termios.c_cc[VTIME] = 0;
+#ifdef HAVE_SGTTY
+ printf_filtered ("Process group = %d\n", state->process_group);
- if (tcsetattr(scb->fd, TCSANOW, &termios))
- {
- fprintf(stderr, "tcsetattr failed: %s\n", safe_strerror(errno));
- }
+ printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags);
+
+ printf_filtered ("tchars: ");
+ for (i = 0; i < (int)sizeof (struct tchars); i++)
+ printf_filtered ("0x%x ", ((unsigned char *)&state->tc)[i]);
+ printf_filtered ("\n");
+
+ printf_filtered ("ltchars: ");
+ for (i = 0; i < (int)sizeof (struct ltchars); i++)
+ printf_filtered ("0x%x ", ((unsigned char *)&state->ltc)[i]);
+ printf_filtered ("\n");
+
+ printf_filtered ("lmode: 0x%x\n", state->lmode);
+#endif
+}
+
+static int
+hardwire_flush_output (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcflush (scb->fd, TCOFLUSH);
#endif
#ifdef HAVE_TERMIO
- struct termio termio;
+ return ioctl (scb->fd, TCFLSH, 1);
+#endif
- if (ioctl (scb->fd, TCGETA, &termio))
- {
- fprintf(stderr, "TCGETA failed: %s\n", safe_strerror(errno));
- }
+#ifdef HAVE_SGTTY
+ /* This flushes both input and output, but we can't do better. */
+ return ioctl (scb->fd, TIOCFLUSH, 0);
+#endif
+}
- termio.c_iflag = 0;
- termio.c_oflag = 0;
- termio.c_lflag = 0;
- termio.c_cflag &= ~(CSIZE|PARENB);
- termio.c_cflag |= CS8;
- termio.c_cc[VMIN] = 0;
- termio.c_cc[VTIME] = 0;
+static int
+hardwire_flush_input (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcflush (scb->fd, TCIFLUSH);
+#endif
- if (ioctl (scb->fd, TCSETA, &termio))
- {
- fprintf(stderr, "TCSETA failed: %s\n", safe_strerror(errno));
- }
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCFLSH, 0);
#endif
#ifdef HAVE_SGTTY
- struct sgttyb sgttyb;
+ /* 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 (ioctl (scb->fd, TIOCGETP, &sgttyb))
- fprintf(stderr, "TIOCGETP failed: %s\n", safe_strerror(errno));
+ if (get_tty_state(scb, &state))
+ fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
- sgttyb.sg_flags |= RAW | ANYP;
- sgttyb.sg_flags &= ~(CBREAK | ECHO);
+#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_cc[VMIN] = 0;
+ state.termios.c_cc[VTIME] = 0;
+#endif
- if (ioctl (scb->fd, TIOCSETP, &sgttyb))
- fprintf(stderr, "TIOCSETP failed: %s\n", safe_strerror(errno));
+#ifdef HAVE_TERMIO
+ state.termio.c_iflag = 0;
+ state.termio.c_oflag = 0;
+ state.termio.c_lflag = 0;
+ state.termio.c_cflag &= ~(CSIZE|PARENB);
+ state.termio.c_cflag |= CS8;
+ state.termio.c_cc[VMIN] = 0;
+ state.termio.c_cc[VTIME] = 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ state.sgttyb.sg_flags |= RAW | ANYP;
+ state.sgttyb.sg_flags &= ~(CBREAK | ECHO);
#endif
+
+ scb->current_timeout = 0;
+
+ if (set_tty_state (scb, &state))
+ fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
}
-/* Wait for input on scb, with timeout seconds */
+/* Wait for input on scb, with timeout seconds. Returns 0 on success,
+ otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
+
+ For termio{s}, we actually just setup VTIME if necessary, and let the
+ timeout occur in the read() in hardwire_read().
+ */
static int
wait_for(scb, timeout)
serial_t scb;
int timeout;
{
- int numfds;
-
#ifdef HAVE_SGTTY
struct timeval tv;
fd_set readfds;
FD_SET(scb->fd, &readfds);
- if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
- else
- numfds = select(scb->fd+1, &readfds, 0, 0, 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
- struct pollfd pollfd;
+ if (timeout == scb->current_timeout)
+ return 0;
- pollfd.fd = scb->fd;
- pollfd.events = POLLIN | POLLPRI;
+ {
+ struct hardwire_ttystate state;
- if (timeout > 0)
- timeout *= 1000;
+ if (get_tty_state(scb, &state))
+ fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
- numfds = poll(&pollfd, 1, timeout);
+#ifdef HAVE_TERMIOS
+ state.termios.c_cc[VTIME] = timeout * 10;
+#endif
-#endif /* defined HAVE_TERMIO || defined HAVE_TERMIOS */
+#ifdef HAVE_TERMIO
+ state.termio.c_cc[VTIME] = timeout * 10;
+#endif
- if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
+ scb->current_timeout = timeout;
+
+ if (set_tty_state (scb, &state))
+ fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
+
+ return 0;
+ }
+#endif /* HAVE_TERMIO || HAVE_TERMIOS */
}
/* 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)
if (scb->bufcnt == 0)
- return SERIAL_EOF; /* 0 chars means end of file */
+ return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
+ distinguish between EOF & timeouts
+ someday] */
else
return SERIAL_ERROR; /* Got an error from read */
serial_t scb;
int rate;
{
-#ifdef HAVE_TERMIOS
- struct termios termios;
+ struct hardwire_ttystate state;
- if (tcgetattr (scb->fd, &termios))
+ if (get_tty_state(scb, &state))
return -1;
- cfsetospeed (&termios, rate_to_code (rate));
- cfsetispeed (&termios, rate_to_code (rate));
-
- if (tcsetattr (scb->fd, TCSANOW, &termios))
- return -1;
+#ifdef HAVE_TERMIOS
+ cfsetospeed (&state.termios, rate_to_code (rate));
+ cfsetispeed (&state.termios, rate_to_code (rate));
#endif
#ifdef HAVE_TERMIO
- struct termio termio;
-
- if (ioctl (scb->fd, TCGETA, &termio))
- return -1;
-
#ifndef CIBAUD
#define CIBAUD CBAUD
#endif
- termio.c_cflag &= ~(CBAUD | CIBAUD);
- termio.c_cflag |= rate_to_code (rate);
-
- if (ioctl (scb->fd, TCSETA, &termio))
- return -1;
+ state.termio.c_cflag &= ~(CBAUD | CIBAUD);
+ state.termio.c_cflag |= rate_to_code (rate);
#endif
#ifdef HAVE_SGTTY
- struct sgttyb sgttyb;
-
- if (ioctl (scb->fd, TIOCGETP, &sgttyb))
- return -1;
+ state.sgttyb.sg_ispeed = rate_to_code (rate);
+ state.sgttyb.sg_ospeed = rate_to_code (rate);
+#endif
- sgttyb.sg_ispeed = rate_to_code (rate);
- sgttyb.sg_ospeed = rate_to_code (rate);
+ return set_tty_state (scb, &state);
+}
- if (ioctl (scb->fd, TIOCSETP, &sgttyb))
- return -1;
+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;
}
return 0;
}
-static void
-hardwire_restore(scb)
- serial_t scb;
-{
-}
-
static void
hardwire_close(scb)
serial_t scb;
hardwire_close,
hardwire_readchar,
hardwire_write,
+ hardwire_flush_output,
+ hardwire_flush_input,
+ hardwire_send_break,
hardwire_raw,
- hardwire_restore,
- hardwire_setbaudrate
+ 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. */
+ /* 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