/* Low level interface to ptrace, for GDB when running under Unix.
- Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "command.h"
-#include "signals.h"
#include "serial.h"
+#include "terminal.h"
#include "target.h"
+#include "gdbthread.h"
-#ifdef USG
-#include <sys/types.h>
-#endif
-
-/* Some USG-esque systems (some of which are BSD-esque enough so that USG
- is not defined) want this header, and it won't do any harm. */
+#include "gdb_string.h"
+#include <signal.h>
#include <fcntl.h>
+#include "gdb_select.h"
-#include <sys/param.h>
-#include <signal.h>
+#include "inflow.h"
-static void
-kill_command PARAMS ((char *, int));
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
-static void
-terminal_ours_1 PARAMS ((int));
+#ifndef O_NOCTTY
+#define O_NOCTTY 0
+#endif
+
+#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
+static void handle_sigio (int);
+#endif
+
+extern void _initialize_inflow (void);
-/* Nonzero if we are debugging an attached outside process
- rather than an inferior. */
+static void pass_signal (int);
-int attach_flag;
+static void kill_command (char *, int);
+static void terminal_ours_1 (int);
\f
/* Record terminal status separately for debugger and inferior. */
-static serial_t stdin_serial;
+static struct serial *stdin_serial;
/* TTY state for the inferior. We save it whenever the inferior stops, and
restore it when it resumes. */
static int tflags_inferior;
static int tflags_ours;
+#ifdef PROCESS_GROUP_TYPE
+/* Process group for us and the inferior. Saved and restored just like
+ {our,inferior}_ttystate. */
+PROCESS_GROUP_TYPE our_process_group;
+PROCESS_GROUP_TYPE inferior_process_group;
+#endif
+
/* While the inferior is running, we want SIGINT and SIGQUIT to go to the
inferior only. If we have job control, that takes care of it. If not,
we save our handlers in these two variables and set SIGINT and SIGQUIT
to SIG_IGN. */
+
static void (*sigint_ours) ();
static void (*sigquit_ours) ();
/* The name of the tty (from the `tty' command) that we gave to the inferior
when it was last started. */
-static char *inferior_thisrun_terminal;
+static const char *inferior_thisrun_terminal;
/* Nonzero if our terminal settings are in effect. Zero if the
inferior's settings are in effect. Ignored if !gdb_has_a_terminal
(). */
-static int terminal_is_ours;
+int terminal_is_ours;
-enum {yes, no, have_not_checked} gdb_has_a_terminal_flag = have_not_checked;
+enum
+ {
+ yes, no, have_not_checked
+ }
+gdb_has_a_terminal_flag = have_not_checked;
/* Does GDB have a terminal (on stdin)? */
int
-gdb_has_a_terminal ()
+gdb_has_a_terminal (void)
{
switch (gdb_has_a_terminal_flag)
{
case no:
return 0;
case have_not_checked:
- /* Get all the current tty settings (including whether we have a tty at
- all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN
- won't work until the serial_ops_list is initialized. */
+ /* Get all the current tty settings (including whether we have a
+ tty at all!). Can't do this in _initialize_inflow because
+ serial_fdopen() won't work until the serial_ops_list is
+ initialized. */
#ifdef F_GETFL
tflags_ours = fcntl (0, F_GETFL, 0);
#endif
gdb_has_a_terminal_flag = no;
- stdin_serial = SERIAL_FDOPEN (0);
if (stdin_serial != NULL)
{
- our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+ our_ttystate = serial_get_tty_state (stdin_serial);
+
if (our_ttystate != NULL)
- gdb_has_a_terminal_flag = yes;
+ {
+ gdb_has_a_terminal_flag = yes;
+#ifdef HAVE_TERMIOS
+ our_process_group = tcgetpgrp (0);
+#endif
+#ifdef HAVE_TERMIO
+ our_process_group = getpgrp ();
+#endif
+#ifdef HAVE_SGTTY
+ ioctl (0, TIOCGPGRP, &our_process_group);
+#endif
+ }
}
return gdb_has_a_terminal_flag == yes;
+ default:
+ /* "Can't happen". */
+ return 0;
}
}
#define OOPSY(what) \
if (result == -1) \
- fprintf(stderr, "[%s failed in terminal_inferior: %s]\n", \
- what, strerror (errno))
+ fprintf_unfiltered(gdb_stderr, "[%s failed in terminal_inferior: %s]\n", \
+ what, safe_strerror (errno))
-static void terminal_ours_1 PARAMS ((int));
+static void terminal_ours_1 (int);
/* Initialize the terminal settings we record for the inferior,
before we actually run the inferior. */
void
-terminal_init_inferior ()
+terminal_init_inferior_with_pgrp (int pgrp)
{
if (gdb_has_a_terminal ())
{
- /* We could just as well copy our_ttystate (if we felt like adding
- a new function SERIAL_COPY_TTY_STATE). */
+ /* We could just as well copy our_ttystate (if we felt like
+ adding a new function serial_copy_tty_state()). */
if (inferior_ttystate)
- free (inferior_ttystate);
- inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
- SERIAL_SET_PROCESS_GROUP (stdin_serial, inferior_ttystate, inferior_pid);
+ xfree (inferior_ttystate);
+ inferior_ttystate = serial_get_tty_state (stdin_serial);
+
+#ifdef PROCESS_GROUP_TYPE
+ inferior_process_group = pgrp;
+#endif
/* Make sure that next time we call terminal_inferior (which will be
- before the program runs, as it needs to be), we install the new
- process group. */
+ before the program runs, as it needs to be), we install the new
+ process group. */
terminal_is_ours = 1;
}
}
+/* Save the terminal settings again. This is necessary for the TUI
+ when it switches to TUI or non-TUI mode; curses changes the terminal
+ and gdb must be able to restore it correctly. */
+
+void
+terminal_save_ours (void)
+{
+ if (gdb_has_a_terminal ())
+ {
+ /* We could just as well copy our_ttystate (if we felt like adding
+ a new function serial_copy_tty_state). */
+ if (our_ttystate)
+ xfree (our_ttystate);
+ our_ttystate = serial_get_tty_state (stdin_serial);
+ }
+}
+
+void
+terminal_init_inferior (void)
+{
+#ifdef PROCESS_GROUP_TYPE
+ /* This is for Lynx, and should be cleaned up by having Lynx be a separate
+ debugging target with a version of target_terminal_init_inferior which
+ passes in the process group to a generic routine which does all the work
+ (and the non-threaded child_terminal_init_inferior can just pass in
+ inferior_ptid to the same routine). */
+ /* We assume INFERIOR_PID is also the child's process group. */
+ terminal_init_inferior_with_pgrp (PIDGET (inferior_ptid));
+#endif /* PROCESS_GROUP_TYPE */
+}
+
/* Put the inferior's terminal settings into effect.
This is preparation for starting or resuming the inferior. */
void
-terminal_inferior ()
+terminal_inferior (void)
{
if (gdb_has_a_terminal () && terminal_is_ours
+ && inferior_ttystate != NULL
&& inferior_thisrun_terminal == 0)
{
int result;
#ifdef F_GETFL
/* Is there a reason this is being done twice? It happens both
- places we use F_SETFL, so I'm inclined to think perhaps there
- is some reason, however perverse. Perhaps not though... */
+ places we use F_SETFL, so I'm inclined to think perhaps there
+ is some reason, however perverse. Perhaps not though... */
result = fcntl (0, F_SETFL, tflags_inferior);
result = fcntl (0, F_SETFL, tflags_inferior);
OOPSY ("fcntl F_SETFL");
#endif
/* Because we were careful to not change in or out of raw mode in
- terminal_ours, we will not change in our out of raw mode with
- this call, so we don't flush any input. */
- result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate);
+ terminal_ours, we will not change in our out of raw mode with
+ this call, so we don't flush any input. */
+ result = serial_set_tty_state (stdin_serial, inferior_ttystate);
+ OOPSY ("setting tty state");
+
+ if (!job_control)
+ {
+ sigint_ours = (void (*)()) signal (SIGINT, SIG_IGN);
+#ifdef SIGQUIT
+ sigquit_ours = (void (*)()) signal (SIGQUIT, SIG_IGN);
+#endif
+ }
/* If attach_flag is set, we don't know whether we are sharing a
- terminal with the inferior or not. (attaching a process
- without a terminal is one case where we do not; attaching a
- process which we ran from the same shell as GDB via `&' is
- one case where we do, I think (but perhaps this is not
- `sharing' in the sense that we need to save and restore tty
- state)). I don't know if there is any way to tell whether we
- are sharing a terminal. So what we do is to go through all
- the saving and restoring of terminal state, but ignore errors
- (which will occur, in tcsetpgrp, if we are not sharing a
- terminal). */
-
- if (!attach_flag)
- OOPSY ("setting tty state");
+ terminal with the inferior or not. (attaching a process
+ without a terminal is one case where we do not; attaching a
+ process which we ran from the same shell as GDB via `&' is
+ one case where we do, I think (but perhaps this is not
+ `sharing' in the sense that we need to save and restore tty
+ state)). I don't know if there is any way to tell whether we
+ are sharing a terminal. So what we do is to go through all
+ the saving and restoring of the tty state, but ignore errors
+ setting the process group, which will happen if we are not
+ sharing a terminal). */
- if (!job_control)
+ if (job_control)
{
- sigint_ours = (void (*) ()) signal (SIGINT, SIG_IGN);
- sigquit_ours = (void (*) ()) signal (SIGQUIT, SIG_IGN);
+#ifdef HAVE_TERMIOS
+ result = tcsetpgrp (0, inferior_process_group);
+ if (!attach_flag)
+ OOPSY ("tcsetpgrp");
+#endif
+
+#ifdef HAVE_SGTTY
+ result = ioctl (0, TIOCSPGRP, &inferior_process_group);
+ if (!attach_flag)
+ OOPSY ("TIOCSPGRP");
+#endif
}
+
}
terminal_is_ours = 0;
}
should be called to get back to a normal state of affairs. */
void
-terminal_ours_for_output ()
+terminal_ours_for_output (void)
{
terminal_ours_1 (1);
}
so they can be restored properly later. */
void
-terminal_ours ()
+terminal_ours (void)
{
terminal_ours_1 (0);
}
flags. */
static void
-terminal_ours_1 (output_only)
- int output_only;
+terminal_ours_1 (int output_only)
{
/* Checking inferior_thisrun_terminal is necessary so that
if GDB is running in the background, it won't block trying
if (!terminal_is_ours)
{
+#ifdef SIGTTOU
/* Ignore this signal since it will happen when we try to set the
- pgrp. */
- void (*osigttou) ();
+ pgrp. */
+ void (*osigttou) () = NULL;
+#endif
int result;
terminal_is_ours = 1;
#ifdef SIGTTOU
if (job_control)
- osigttou = (void (*) ()) signal (SIGTTOU, SIG_IGN);
+ osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
#endif
if (inferior_ttystate)
- free (inferior_ttystate);
- inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+ xfree (inferior_ttystate);
+ inferior_ttystate = serial_get_tty_state (stdin_serial);
+#ifdef HAVE_TERMIOS
+ inferior_process_group = tcgetpgrp (0);
+#endif
+#ifdef HAVE_TERMIO
+ inferior_process_group = getpgrp ();
+#endif
+#ifdef HAVE_SGTTY
+ ioctl (0, TIOCGPGRP, &inferior_process_group);
+#endif
/* Here we used to set ICANON in our ttystate, but I believe this
- was an artifact from before when we used readline. Readline sets
- the tty state when it needs to. */
+ was an artifact from before when we used readline. Readline sets
+ the tty state when it needs to.
+ FIXME-maybe: However, query() expects non-raw mode and doesn't
+ use readline. Maybe query should use readline (on the other hand,
+ this only matters for HAVE_SGTTY, not termio or termios, I think). */
/* Set tty state to our_ttystate. We don't change in our out of raw
- mode, to avoid flushing input. We need to do the same thing
- regardless of output_only, because we don't have separate
- terminal_is_ours and terminal_is_ours_for_output flags. It's OK,
- though, since readline will deal with raw mode when/if it needs to.
- */
- SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate,
+ mode, to avoid flushing input. We need to do the same thing
+ regardless of output_only, because we don't have separate
+ terminal_is_ours and terminal_is_ours_for_output flags. It's OK,
+ though, since readline will deal with raw mode when/if it needs to.
+ */
+
+ serial_noflush_set_tty_state (stdin_serial, our_ttystate,
inferior_ttystate);
+ if (job_control)
+ {
+#ifdef HAVE_TERMIOS
+ result = tcsetpgrp (0, our_process_group);
+#if 0
+ /* This fails on Ultrix with EINVAL if you run the testsuite
+ in the background with nohup, and then log out. GDB never
+ used to check for an error here, so perhaps there are other
+ such situations as well. */
+ if (result == -1)
+ fprintf_unfiltered (gdb_stderr, "[tcsetpgrp failed in terminal_ours: %s]\n",
+ safe_strerror (errno));
+#endif
+#endif /* termios */
+
+#ifdef HAVE_SGTTY
+ result = ioctl (0, TIOCSPGRP, &our_process_group);
+#endif
+ }
+
#ifdef SIGTTOU
if (job_control)
signal (SIGTTOU, osigttou);
if (!job_control)
{
signal (SIGINT, sigint_ours);
+#ifdef SIGQUIT
signal (SIGQUIT, sigquit_ours);
+#endif
}
#ifdef F_GETFL
tflags_inferior = fcntl (0, F_GETFL, 0);
/* Is there a reason this is being done twice? It happens both
- places we use F_SETFL, so I'm inclined to think perhaps there
- is some reason, however perverse. Perhaps not though... */
+ places we use F_SETFL, so I'm inclined to think perhaps there
+ is some reason, however perverse. Perhaps not though... */
result = fcntl (0, F_SETFL, tflags_ours);
result = fcntl (0, F_SETFL, tflags_ours);
#endif
- result = result; /* lint */
+ result = result; /* lint */
}
}
-/* ARGSUSED */
void
-term_info (arg, from_tty)
- char *arg;
- int from_tty;
+term_info (char *arg, int from_tty)
{
target_terminal_info (arg, from_tty);
}
-/* ARGSUSED */
void
-child_terminal_info (args, from_tty)
- char *args;
- int from_tty;
+child_terminal_info (char *args, int from_tty)
{
if (!gdb_has_a_terminal ())
{
- printf_filtered ("This GDB does not control a terminal.\n");
+ printf_filtered (_("This GDB does not control a terminal.\n"));
return;
}
- printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
+ printf_filtered (_("Inferior's terminal status (currently saved by GDB):\n"));
/* First the fcntl flags. */
{
int flags;
-
+
flags = tflags_inferior;
printf_filtered ("File descriptor flags = ");
/* (O_ACCMODE) parens are to avoid Ultrix header file bug */
switch (flags & (O_ACCMODE))
{
- case O_RDONLY: printf_filtered ("O_RDONLY"); break;
- case O_WRONLY: printf_filtered ("O_WRONLY"); break;
- case O_RDWR: printf_filtered ("O_RDWR"); break;
+ case O_RDONLY:
+ printf_filtered ("O_RDONLY");
+ break;
+ case O_WRONLY:
+ printf_filtered ("O_WRONLY");
+ break;
+ case O_RDWR:
+ printf_filtered ("O_RDWR");
+ break;
}
flags &= ~(O_ACCMODE);
#ifdef O_NONBLOCK
- if (flags & O_NONBLOCK)
+ if (flags & O_NONBLOCK)
printf_filtered (" | O_NONBLOCK");
flags &= ~O_NONBLOCK;
#endif
-
+
#if defined (O_NDELAY)
/* If O_NDELAY and O_NONBLOCK are defined to the same thing, we will
print it as O_NONBLOCK, which is good cause that is what POSIX
printf_filtered ("\n");
}
- SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate);
+#ifdef PROCESS_GROUP_TYPE
+ printf_filtered ("Process group = %d\n",
+ (int) inferior_process_group);
+#endif
+
+ serial_print_tty_state (stdin_serial, inferior_ttystate, gdb_stdout);
}
\f
/* NEW_TTY_PREFORK is called before forking a new child process,
the terminal specified in the NEW_TTY_PREFORK call. */
void
-new_tty_prefork (ttyname)
- char *ttyname;
+new_tty_prefork (const char *ttyname)
{
/* Save the name for later, for determining whether we and the child
are sharing a tty. */
}
void
-new_tty ()
+new_tty (void)
{
- register int tty;
+ int tty;
if (inferior_thisrun_terminal == 0)
return;
-#if !defined(__GO32__)
+#if !defined(__GO32__) && !defined(_WIN32)
#ifdef TIOCNOTTY
/* Disconnect the child process from our controlling terminal. On some
systems (SVR4 for example), this may cause a SIGTTOU, so temporarily
ignore SIGTTOU. */
- tty = open("/dev/tty", O_RDWR);
+ tty = open ("/dev/tty", O_RDWR);
if (tty > 0)
{
void (*osigttou) ();
- osigttou = (void (*)()) signal(SIGTTOU, SIG_IGN);
- ioctl(tty, TIOCNOTTY, 0);
- close(tty);
- signal(SIGTTOU, osigttou);
+ osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
+ ioctl (tty, TIOCNOTTY, 0);
+ close (tty);
+ signal (SIGTTOU, osigttou);
}
#endif
/* Now open the specified new terminal. */
-
-#ifdef USE_O_NOCTTY
- tty = open(inferior_thisrun_terminal, O_RDWR | O_NOCTTY);
-#else
- tty = open(inferior_thisrun_terminal, O_RDWR);
-#endif
+ tty = open (inferior_thisrun_terminal, O_RDWR | O_NOCTTY);
if (tty == -1)
{
print_sys_errmsg (inferior_thisrun_terminal, errno);
- _exit(1);
+ _exit (1);
}
/* Avoid use of dup2; doesn't exist on all systems. */
if (tty != 0)
- { close (0); dup (tty); }
+ {
+ close (0);
+ dup (tty);
+ }
if (tty != 1)
- { close (1); dup (tty); }
+ {
+ close (1);
+ dup (tty);
+ }
if (tty != 2)
- { close (2); dup (tty); }
+ {
+ close (2);
+ dup (tty);
+ }
if (tty > 2)
- close(tty);
-#endif /* !go32 */
+ close (tty);
+#endif /* !go32 && !win32 */
}
\f
/* Kill the inferior process. Make us have no inferior. */
-/* ARGSUSED */
static void
-kill_command (arg, from_tty)
- char *arg;
- int from_tty;
+kill_command (char *arg, int from_tty)
{
- /* Shouldn't this be target_has_execution? FIXME. */
- if (inferior_pid == 0)
- error ("The program is not being run.");
+ /* FIXME: This should not really be inferior_ptid (or target_has_execution).
+ It should be a distinct flag that indicates that a target is active, cuz
+ some targets don't have processes! */
+
+ if (ptid_equal (inferior_ptid, null_ptid))
+ error (_("The program is not being run."));
if (!query ("Kill the program being debugged? "))
- error ("Not confirmed.");
+ error (_("Not confirmed."));
target_kill ();
+ init_thread_list (); /* Destroy thread info */
+
/* Killing off the inferior can leave us with a core file. If so,
print the state we are left in. */
- if (target_has_stack) {
- printf_filtered ("In %s,\n", current_target->to_longname);
- if (selected_frame == NULL)
- fputs_filtered ("No selected stack frame.\n", stdout);
- else
- print_stack_frame (selected_frame, selected_frame_level, 1);
- }
+ if (target_has_stack)
+ {
+ printf_filtered (_("In %s,\n"), target_longname);
+ print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
+ }
+ bfd_cache_close_all ();
}
+\f
+/* Call set_sigint_trap when you need to pass a signal on to an attached
+ process when handling SIGINT */
-/* The inferior process has died. Long live the inferior! */
+static void
+pass_signal (int signo)
+{
+#ifndef _WIN32
+ kill (PIDGET (inferior_ptid), SIGINT);
+#endif
+}
+
+static void (*osig) ();
void
-generic_mourn_inferior ()
+set_sigint_trap (void)
{
- inferior_pid = 0;
- attach_flag = 0;
- mark_breakpoints_out ();
- registers_changed ();
-
-#ifdef CLEAR_DEFERRED_STORES
- /* Delete any pending stores to the inferior... */
- CLEAR_DEFERRED_STORES;
-#endif
-
- reopen_exec_file ();
- flush_cached_frames ();
- if (target_has_stack) {
- set_current_frame ( create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
- select_frame (get_current_frame (), 0);
- } else {
- set_current_frame (0);
- select_frame ((FRAME) 0, -1);
- }
- /* It is confusing to the user for ignore counts to stick around
- from previous runs of the inferior. So clear them. */
- breakpoint_clear_ignore_counts ();
+ if (attach_flag || inferior_thisrun_terminal)
+ {
+ osig = (void (*)()) signal (SIGINT, pass_signal);
+ }
+}
+
+void
+clear_sigint_trap (void)
+{
+ if (attach_flag || inferior_thisrun_terminal)
+ {
+ signal (SIGINT, osig);
+ }
}
\f
-/* Call set_sigint_trap when you need to pass a signal on to an attached
- process when handling SIGINT */
+#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
+static void (*old_sigio) ();
-/* ARGSUSED */
static void
-pass_signal (signo)
- int signo;
+handle_sigio (int signo)
{
- kill (inferior_pid, SIGINT);
+ int numfds;
+ fd_set readfds;
+
+ signal (SIGIO, handle_sigio);
+
+ FD_ZERO (&readfds);
+ FD_SET (target_activity_fd, &readfds);
+ numfds = gdb_select (target_activity_fd + 1, &readfds, NULL, NULL, NULL);
+ if (numfds >= 0 && FD_ISSET (target_activity_fd, &readfds))
+ {
+#ifndef _WIN32
+ if ((*target_activity_function) ())
+ kill (PIDGET (inferior_ptid), SIGINT);
+#endif
+ }
}
-static void (*osig)();
+static int old_fcntl_flags;
void
-set_sigint_trap()
+set_sigio_trap (void)
{
- osig = (void (*) ()) signal (SIGINT, pass_signal);
+ if (target_activity_function)
+ {
+ old_sigio = (void (*)()) signal (SIGIO, handle_sigio);
+ fcntl (target_activity_fd, F_SETOWN, getpid ());
+ old_fcntl_flags = fcntl (target_activity_fd, F_GETFL, 0);
+ fcntl (target_activity_fd, F_SETFL, old_fcntl_flags | FASYNC);
+ }
}
void
-clear_sigint_trap()
+clear_sigio_trap (void)
{
- signal (SIGINT, osig);
+ if (target_activity_function)
+ {
+ signal (SIGIO, old_sigio);
+ fcntl (target_activity_fd, F_SETFL, old_fcntl_flags);
+ }
}
+#else /* No SIGIO. */
+void
+set_sigio_trap (void)
+{
+ if (target_activity_function)
+ internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
+}
+
+void
+clear_sigio_trap (void)
+{
+ if (target_activity_function)
+ internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
+}
+#endif /* No SIGIO. */
\f
+
+/* 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 (void)
+{
+ int retval = 0;
+
+ if (job_control)
+ {
+#if defined (HAVE_TERMIOS) || defined (TIOCGPGRP)
+#ifdef HAVE_SETPGID
+ /* The call 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
+#ifdef HAVE_SETPGRP
+#ifdef SETPGRP_VOID
+ retval = setpgrp ();
+#else
+ retval = setpgrp (getpid (), getpid ());
+#endif
+#endif /* HAVE_SETPGRP */
+#endif /* HAVE_SETPGID */
+#endif /* defined (HAVE_TERMIOS) || defined (TIOCGPGRP) */
+ }
+
+ return retval;
+}
+
+/* Get all the current tty settings (including whether we have a
+ tty at all!). We can't do this in _initialize_inflow because
+ serial_fdopen() won't work until the serial_ops_list is
+ initialized, but we don't want to do it lazily either, so
+ that we can guarantee stdin_serial is opened if there is
+ a terminal. */
void
-_initialize_inflow ()
+initialize_stdin_serial (void)
+{
+ stdin_serial = serial_fdopen (0);
+}
+
+void
+_initialize_inflow (void)
{
add_info ("terminal", term_info,
- "Print inferior's saved terminal status.");
+ _("Print inferior's saved terminal status."));
add_com ("kill", class_run, kill_command,
- "Kill execution of program being debugged.");
+ _("Kill execution of program being debugged."));
- inferior_pid = 0;
+ inferior_ptid = null_ptid;
terminal_is_ours = 1;
+
+ /* OK, figure out whether we have job control. If neither termios nor
+ sgtty (i.e. termio or go32), leave job_control 0. */
+
+#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
+#ifdef _SC_JOB_CONTROL
+ job_control = sysconf (_SC_JOB_CONTROL);
+#else
+ job_control = 0; /* have to assume the worst */
+#endif /* _SC_JOB_CONTROL */
+#endif /* _POSIX_JOB_CONTROL */
+#endif /* HAVE_TERMIOS */
+
+#ifdef HAVE_SGTTY
+#ifdef TIOCGPGRP
+ job_control = 1;
+#else
+ job_control = 0;
+#endif /* TIOCGPGRP */
+#endif /* sgtty */
}
projects / deliverable / binutils-gdb.git / blobdiff