/* Low level interface to ptrace, for GDB when running under Unix.
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/* Low level interface to ptrace, for GDB when running under Unix.
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Copyright 1986-87, 1989, 1991-92, 1995, 1998 Free Software Foundation, Inc.
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Copyright 1986-87, 1989, 1991-92, 1995, 1998 Free Software Foundation, Inc.
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "defs.h"
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#include "frame.h"
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#include "frame.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "command.h"
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#include "command.h"
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#include "signals.h"
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#include "signals.h"
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#include "serial.h"
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#include "serial.h"
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#include "terminal.h"
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#include "terminal.h"
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#include "target.h"
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#include "target.h"
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#include "gdbthread.h"
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#include "gdbthread.h"
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#include "gdb_string.h"
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#include "gdb_string.h"
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#include <signal.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#ifdef HAVE_SYS_SELECT_H
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#include <sys/select.h>
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#endif
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#endif
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#ifdef HAVE_TERMIOS
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#ifdef HAVE_TERMIOS
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#define PROCESS_GROUP_TYPE pid_t
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#define PROCESS_GROUP_TYPE pid_t
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#endif
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#endif
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#ifdef HAVE_TERMIO
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#ifdef HAVE_TERMIO
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#define PROCESS_GROUP_TYPE int
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#define PROCESS_GROUP_TYPE int
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#endif
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#endif
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#ifdef HAVE_SGTTY
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#ifdef HAVE_SGTTY
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#ifdef SHORT_PGRP
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#ifdef SHORT_PGRP
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/* This is only used for the ultra. Does it have pid_t? */
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/* This is only used for the ultra. Does it have pid_t? */
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#define PROCESS_GROUP_TYPE short
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#define PROCESS_GROUP_TYPE short
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#else
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#else
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#define PROCESS_GROUP_TYPE int
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#define PROCESS_GROUP_TYPE int
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#endif
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#endif
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#endif /* sgtty */
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#endif /* sgtty */
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#ifdef HAVE_SYS_IOCTL_H
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#include <sys/ioctl.h>
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#endif
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#endif
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#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
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#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
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static void
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static void
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handle_sigio PARAMS ((int));
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handle_sigio PARAMS ((int));
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#endif
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#endif
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extern void _initialize_inflow PARAMS ((void));
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extern void _initialize_inflow PARAMS ((void));
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static void
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static void
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pass_signal PARAMS ((int));
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pass_signal PARAMS ((int));
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static void
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static void
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kill_command PARAMS ((char *, int));
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kill_command PARAMS ((char *, int));
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static void
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static void
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terminal_ours_1 PARAMS ((int));
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terminal_ours_1 PARAMS ((int));
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/* Record terminal status separately for debugger and inferior. */
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/* Record terminal status separately for debugger and inferior. */
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static serial_t stdin_serial;
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static serial_t stdin_serial;
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/* TTY state for the inferior. We save it whenever the inferior stops, and
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/* TTY state for the inferior. We save it whenever the inferior stops, and
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restore it when it resumes. */
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restore it when it resumes. */
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static serial_ttystate inferior_ttystate;
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static serial_ttystate inferior_ttystate;
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/* Our own tty state, which we restore every time we need to deal with the
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/* Our own tty state, which we restore every time we need to deal with the
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terminal. We only set it once, when GDB first starts. The settings of
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terminal. We only set it once, when GDB first starts. The settings of
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flags which readline saves and restores and unimportant. */
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flags which readline saves and restores and unimportant. */
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static serial_ttystate our_ttystate;
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static serial_ttystate our_ttystate;
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/* fcntl flags for us and the inferior. Saved and restored just like
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/* fcntl flags for us and the inferior. Saved and restored just like
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{our,inferior}_ttystate. */
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{our,inferior}_ttystate. */
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static int tflags_inferior;
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static int tflags_inferior;
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static int tflags_ours;
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static int tflags_ours;
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#ifdef PROCESS_GROUP_TYPE
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#ifdef PROCESS_GROUP_TYPE
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/* Process group for us and the inferior. Saved and restored just like
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/* Process group for us and the inferior. Saved and restored just like
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{our,inferior}_ttystate. */
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{our,inferior}_ttystate. */
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PROCESS_GROUP_TYPE our_process_group;
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PROCESS_GROUP_TYPE our_process_group;
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PROCESS_GROUP_TYPE inferior_process_group;
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PROCESS_GROUP_TYPE inferior_process_group;
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#endif
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#endif
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/* While the inferior is running, we want SIGINT and SIGQUIT to go to the
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/* While the inferior is running, we want SIGINT and SIGQUIT to go to the
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inferior only. If we have job control, that takes care of it. If not,
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inferior only. If we have job control, that takes care of it. If not,
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we save our handlers in these two variables and set SIGINT and SIGQUIT
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we save our handlers in these two variables and set SIGINT and SIGQUIT
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to SIG_IGN. */
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to SIG_IGN. */
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static void (*sigint_ours) ();
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static void (*sigint_ours) ();
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static void (*sigquit_ours) ();
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static void (*sigquit_ours) ();
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/* The name of the tty (from the `tty' command) that we gave to the inferior
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/* The name of the tty (from the `tty' command) that we gave to the inferior
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when it was last started. */
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when it was last started. */
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static char *inferior_thisrun_terminal;
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static char *inferior_thisrun_terminal;
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/* Nonzero if our terminal settings are in effect. Zero if the
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/* Nonzero if our terminal settings are in effect. Zero if the
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inferior's settings are in effect. Ignored if !gdb_has_a_terminal
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inferior's settings are in effect. Ignored if !gdb_has_a_terminal
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(). */
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(). */
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int terminal_is_ours;
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int terminal_is_ours;
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enum
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enum
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{
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{
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yes, no, have_not_checked
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yes, no, have_not_checked
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}
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}
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gdb_has_a_terminal_flag = have_not_checked;
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gdb_has_a_terminal_flag = have_not_checked;
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/* Does GDB have a terminal (on stdin)? */
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/* Does GDB have a terminal (on stdin)? */
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int
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int
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gdb_has_a_terminal ()
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gdb_has_a_terminal ()
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{
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{
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switch (gdb_has_a_terminal_flag)
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switch (gdb_has_a_terminal_flag)
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{
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{
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case yes:
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case yes:
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return 1;
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return 1;
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case no:
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case no:
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return 0;
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return 0;
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case have_not_checked:
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case have_not_checked:
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/* Get all the current tty settings (including whether we have a tty at
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/* Get all the current tty settings (including whether we have a tty at
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all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN
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all!). Can't do this in _initialize_inflow because SERIAL_FDOPEN
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won't work until the serial_ops_list is initialized. */
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won't work until the serial_ops_list is initialized. */
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#ifdef F_GETFL
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#ifdef F_GETFL
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tflags_ours = fcntl (0, F_GETFL, 0);
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tflags_ours = fcntl (0, F_GETFL, 0);
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#endif
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#endif
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gdb_has_a_terminal_flag = no;
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gdb_has_a_terminal_flag = no;
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stdin_serial = SERIAL_FDOPEN (0);
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stdin_serial = SERIAL_FDOPEN (0);
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if (stdin_serial != NULL)
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if (stdin_serial != NULL)
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{
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{
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our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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our_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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if (our_ttystate != NULL)
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if (our_ttystate != NULL)
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{
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{
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gdb_has_a_terminal_flag = yes;
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gdb_has_a_terminal_flag = yes;
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#ifdef HAVE_TERMIOS
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#ifdef HAVE_TERMIOS
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our_process_group = tcgetpgrp (0);
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our_process_group = tcgetpgrp (0);
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#endif
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#endif
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#ifdef HAVE_TERMIO
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#ifdef HAVE_TERMIO
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our_process_group = getpgrp ();
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our_process_group = getpgrp ();
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#endif
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#endif
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#ifdef HAVE_SGTTY
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#ifdef HAVE_SGTTY
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ioctl (0, TIOCGPGRP, &our_process_group);
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ioctl (0, TIOCGPGRP, &our_process_group);
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#endif
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#endif
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}
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}
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}
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}
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return gdb_has_a_terminal_flag == yes;
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return gdb_has_a_terminal_flag == yes;
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default:
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default:
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/* "Can't happen". */
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/* "Can't happen". */
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return 0;
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return 0;
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}
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}
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}
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}
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/* Macro for printing errors from ioctl operations */
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/* Macro for printing errors from ioctl operations */
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#define OOPSY(what) \
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#define OOPSY(what) \
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if (result == -1) \
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if (result == -1) \
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fprintf_unfiltered(gdb_stderr, "[%s failed in terminal_inferior: %s]\n", \
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fprintf_unfiltered(gdb_stderr, "[%s failed in terminal_inferior: %s]\n", \
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what, strerror (errno))
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what, strerror (errno))
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static void terminal_ours_1 PARAMS ((int));
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static void terminal_ours_1 PARAMS ((int));
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/* Initialize the terminal settings we record for the inferior,
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/* Initialize the terminal settings we record for the inferior,
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before we actually run the inferior. */
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before we actually run the inferior. */
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void
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void
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terminal_init_inferior_with_pgrp (pgrp)
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terminal_init_inferior_with_pgrp (pgrp)
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int pgrp;
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int pgrp;
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{
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{
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if (gdb_has_a_terminal ())
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if (gdb_has_a_terminal ())
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{
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{
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/* We could just as well copy our_ttystate (if we felt like adding
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/* We could just as well copy our_ttystate (if we felt like adding
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a new function SERIAL_COPY_TTY_STATE). */
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a new function SERIAL_COPY_TTY_STATE). */
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if (inferior_ttystate)
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if (inferior_ttystate)
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free (inferior_ttystate);
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free (inferior_ttystate);
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inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
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#ifdef PROCESS_GROUP_TYPE
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#ifdef PROCESS_GROUP_TYPE
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inferior_process_group = pgrp;
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inferior_process_group = pgrp;
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#endif
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#endif
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/* Make sure that next time we call terminal_inferior (which will be
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/* Make sure that next time we call terminal_inferior (which will be
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before the program runs, as it needs to be), we install the new
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before the program runs, as it needs to be), we install the new
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process group. */
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process group. */
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terminal_is_ours = 1;
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terminal_is_ours = 1;
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}
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}
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}
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}
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void
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void
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terminal_init_inferior ()
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terminal_init_inferior ()
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{
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{
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#ifdef PROCESS_GROUP_TYPE
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#ifdef PROCESS_GROUP_TYPE
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/* This is for Lynx, and should be cleaned up by having Lynx be a separate
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/* This is for Lynx, and should be cleaned up by having Lynx be a separate
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debugging target with a version of target_terminal_init_inferior which
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debugging target with a version of target_terminal_init_inferior which
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passes in the process group to a generic routine which does all the work
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passes in the process group to a generic routine which does all the work
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(and the non-threaded child_terminal_init_inferior can just pass in
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(and the non-threaded child_terminal_init_inferior can just pass in
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inferior_pid to the same routine). */
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inferior_pid to the same routine). */
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/* We assume INFERIOR_PID is also the child's process group. */
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/* We assume INFERIOR_PID is also the child's process group. */
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terminal_init_inferior_with_pgrp (PIDGET (inferior_pid));
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terminal_init_inferior_with_pgrp (PIDGET (inferior_pid));
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#endif /* PROCESS_GROUP_TYPE */
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#endif /* PROCESS_GROUP_TYPE */
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}
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}
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/* Put the inferior's terminal settings into effect.
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/* Put the inferior's terminal settings into effect.
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This is preparation for starting or resuming the inferior. */
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This is preparation for starting or resuming the inferior. */
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void
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void
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terminal_inferior ()
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terminal_inferior ()
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{
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{
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if (gdb_has_a_terminal () && terminal_is_ours
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if (gdb_has_a_terminal () && terminal_is_ours
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&& inferior_thisrun_terminal == 0)
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&& inferior_thisrun_terminal == 0)
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{
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{
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int result;
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int result;
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#ifdef F_GETFL
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#ifdef F_GETFL
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/* Is there a reason this is being done twice? It happens both
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/* Is there a reason this is being done twice? It happens both
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places we use F_SETFL, so I'm inclined to think perhaps there
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places we use F_SETFL, so I'm inclined to think perhaps there
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is some reason, however perverse. Perhaps not though... */
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is some reason, however perverse. Perhaps not though... */
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result = fcntl (0, F_SETFL, tflags_inferior);
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result = fcntl (0, F_SETFL, tflags_inferior);
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result = fcntl (0, F_SETFL, tflags_inferior);
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result = fcntl (0, F_SETFL, tflags_inferior);
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OOPSY ("fcntl F_SETFL");
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OOPSY ("fcntl F_SETFL");
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#endif
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#endif
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/* Because we were careful to not change in or out of raw mode in
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/* Because we were careful to not change in or out of raw mode in
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terminal_ours, we will not change in our out of raw mode with
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terminal_ours, we will not change in our out of raw mode with
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this call, so we don't flush any input. */
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this call, so we don't flush any input. */
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result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate);
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result = SERIAL_SET_TTY_STATE (stdin_serial, inferior_ttystate);
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OOPSY ("setting tty state");
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OOPSY ("setting tty state");
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if (!job_control)
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if (!job_control)
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{
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{
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sigint_ours = (void (*)()) signal (SIGINT, SIG_IGN);
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sigint_ours = (void (*)()) signal (SIGINT, SIG_IGN);
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#ifdef SIGQUIT
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#ifdef SIGQUIT
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sigquit_ours = (void (*)()) signal (SIGQUIT, SIG_IGN);
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sigquit_ours = (void (*)()) signal (SIGQUIT, SIG_IGN);
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#endif
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#endif
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}
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}
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/* If attach_flag is set, we don't know whether we are sharing a
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/* If attach_flag is set, we don't know whether we are sharing a
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terminal with the inferior or not. (attaching a process
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terminal with the inferior or not. (attaching a process
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without a terminal is one case where we do not; attaching a
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without a terminal is one case where we do not; attaching a
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process which we ran from the same shell as GDB via `&' is
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process which we ran from the same shell as GDB via `&' is
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one case where we do, I think (but perhaps this is not
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one case where we do, I think (but perhaps this is not
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`sharing' in the sense that we need to save and restore tty
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`sharing' in the sense that we need to save and restore tty
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state)). I don't know if there is any way to tell whether we
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state)). I don't know if there is any way to tell whether we
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are sharing a terminal. So what we do is to go through all
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are sharing a terminal. So what we do is to go through all
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the saving and restoring of the tty state, but ignore errors
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the saving and restoring of the tty state, but ignore errors
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setting the process group, which will happen if we are not
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setting the process group, which will happen if we are not
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sharing a terminal). */
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sharing a terminal). */
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|
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if (job_control)
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if (job_control)
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{
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{
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#ifdef HAVE_TERMIOS
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#ifdef HAVE_TERMIOS
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result = tcsetpgrp (0, inferior_process_group);
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result = tcsetpgrp (0, inferior_process_group);
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if (!attach_flag)
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if (!attach_flag)
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OOPSY ("tcsetpgrp");
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OOPSY ("tcsetpgrp");
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#endif
|
#endif
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|
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#ifdef HAVE_SGTTY
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#ifdef HAVE_SGTTY
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result = ioctl (0, TIOCSPGRP, &inferior_process_group);
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result = ioctl (0, TIOCSPGRP, &inferior_process_group);
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if (!attach_flag)
|
if (!attach_flag)
|
OOPSY ("TIOCSPGRP");
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OOPSY ("TIOCSPGRP");
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#endif
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#endif
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}
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}
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|
|
}
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}
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terminal_is_ours = 0;
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terminal_is_ours = 0;
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}
|
}
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|
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/* Put some of our terminal settings into effect,
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/* Put some of our terminal settings into effect,
|
enough to get proper results from our output,
|
enough to get proper results from our output,
|
but do not change into or out of RAW mode
|
but do not change into or out of RAW mode
|
so that no input is discarded.
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so that no input is discarded.
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|
|
After doing this, either terminal_ours or terminal_inferior
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After doing this, either terminal_ours or terminal_inferior
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should be called to get back to a normal state of affairs. */
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should be called to get back to a normal state of affairs. */
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|
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void
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void
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terminal_ours_for_output ()
|
terminal_ours_for_output ()
|
{
|
{
|
terminal_ours_1 (1);
|
terminal_ours_1 (1);
|
}
|
}
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|
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/* Put our terminal settings into effect.
|
/* Put our terminal settings into effect.
|
First record the inferior's terminal settings
|
First record the inferior's terminal settings
|
so they can be restored properly later. */
|
so they can be restored properly later. */
|
|
|
void
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void
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terminal_ours ()
|
terminal_ours ()
|
{
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{
|
terminal_ours_1 (0);
|
terminal_ours_1 (0);
|
}
|
}
|
|
|
/* output_only is not used, and should not be used unless we introduce
|
/* output_only is not used, and should not be used unless we introduce
|
separate terminal_is_ours and terminal_is_ours_for_output
|
separate terminal_is_ours and terminal_is_ours_for_output
|
flags. */
|
flags. */
|
|
|
static void
|
static void
|
terminal_ours_1 (output_only)
|
terminal_ours_1 (output_only)
|
int output_only;
|
int output_only;
|
{
|
{
|
/* Checking inferior_thisrun_terminal is necessary so that
|
/* Checking inferior_thisrun_terminal is necessary so that
|
if GDB is running in the background, it won't block trying
|
if GDB is running in the background, it won't block trying
|
to do the ioctl()'s below. Checking gdb_has_a_terminal
|
to do the ioctl()'s below. Checking gdb_has_a_terminal
|
avoids attempting all the ioctl's when running in batch. */
|
avoids attempting all the ioctl's when running in batch. */
|
if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0)
|
if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0)
|
return;
|
return;
|
|
|
if (!terminal_is_ours)
|
if (!terminal_is_ours)
|
{
|
{
|
/* Ignore this signal since it will happen when we try to set the
|
/* Ignore this signal since it will happen when we try to set the
|
pgrp. */
|
pgrp. */
|
void (*osigttou) ();
|
void (*osigttou) ();
|
int result;
|
int result;
|
|
|
terminal_is_ours = 1;
|
terminal_is_ours = 1;
|
|
|
#ifdef SIGTTOU
|
#ifdef SIGTTOU
|
if (job_control)
|
if (job_control)
|
osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
|
osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
|
#endif
|
#endif
|
|
|
if (inferior_ttystate)
|
if (inferior_ttystate)
|
free (inferior_ttystate);
|
free (inferior_ttystate);
|
inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
|
inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
|
#ifdef HAVE_TERMIOS
|
#ifdef HAVE_TERMIOS
|
inferior_process_group = tcgetpgrp (0);
|
inferior_process_group = tcgetpgrp (0);
|
#endif
|
#endif
|
#ifdef HAVE_TERMIO
|
#ifdef HAVE_TERMIO
|
inferior_process_group = getpgrp ();
|
inferior_process_group = getpgrp ();
|
#endif
|
#endif
|
#ifdef HAVE_SGTTY
|
#ifdef HAVE_SGTTY
|
ioctl (0, TIOCGPGRP, &inferior_process_group);
|
ioctl (0, TIOCGPGRP, &inferior_process_group);
|
#endif
|
#endif
|
|
|
/* Here we used to set ICANON in our ttystate, but I believe this
|
/* Here we used to set ICANON in our ttystate, but I believe this
|
was an artifact from before when we used readline. Readline sets
|
was an artifact from before when we used readline. Readline sets
|
the tty state when it needs to.
|
the tty state when it needs to.
|
FIXME-maybe: However, query() expects non-raw mode and doesn't
|
FIXME-maybe: However, query() expects non-raw mode and doesn't
|
use readline. Maybe query should use readline (on the other hand,
|
use readline. Maybe query should use readline (on the other hand,
|
this only matters for HAVE_SGTTY, not termio or termios, I think). */
|
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
|
/* 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
|
mode, to avoid flushing input. We need to do the same thing
|
regardless of output_only, because we don't have separate
|
regardless of output_only, because we don't have separate
|
terminal_is_ours and terminal_is_ours_for_output flags. It's OK,
|
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.
|
though, since readline will deal with raw mode when/if it needs to.
|
*/
|
*/
|
|
|
SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate,
|
SERIAL_NOFLUSH_SET_TTY_STATE (stdin_serial, our_ttystate,
|
inferior_ttystate);
|
inferior_ttystate);
|
|
|
if (job_control)
|
if (job_control)
|
{
|
{
|
#ifdef HAVE_TERMIOS
|
#ifdef HAVE_TERMIOS
|
result = tcsetpgrp (0, our_process_group);
|
result = tcsetpgrp (0, our_process_group);
|
#if 0
|
#if 0
|
/* This fails on Ultrix with EINVAL if you run the testsuite
|
/* This fails on Ultrix with EINVAL if you run the testsuite
|
in the background with nohup, and then log out. GDB never
|
in the background with nohup, and then log out. GDB never
|
used to check for an error here, so perhaps there are other
|
used to check for an error here, so perhaps there are other
|
such situations as well. */
|
such situations as well. */
|
if (result == -1)
|
if (result == -1)
|
fprintf_unfiltered (gdb_stderr, "[tcsetpgrp failed in terminal_ours: %s]\n",
|
fprintf_unfiltered (gdb_stderr, "[tcsetpgrp failed in terminal_ours: %s]\n",
|
strerror (errno));
|
strerror (errno));
|
#endif
|
#endif
|
#endif /* termios */
|
#endif /* termios */
|
|
|
#ifdef HAVE_SGTTY
|
#ifdef HAVE_SGTTY
|
result = ioctl (0, TIOCSPGRP, &our_process_group);
|
result = ioctl (0, TIOCSPGRP, &our_process_group);
|
#endif
|
#endif
|
}
|
}
|
|
|
#ifdef SIGTTOU
|
#ifdef SIGTTOU
|
if (job_control)
|
if (job_control)
|
signal (SIGTTOU, osigttou);
|
signal (SIGTTOU, osigttou);
|
#endif
|
#endif
|
|
|
if (!job_control)
|
if (!job_control)
|
{
|
{
|
signal (SIGINT, sigint_ours);
|
signal (SIGINT, sigint_ours);
|
#ifdef SIGQUIT
|
#ifdef SIGQUIT
|
signal (SIGQUIT, sigquit_ours);
|
signal (SIGQUIT, sigquit_ours);
|
#endif
|
#endif
|
}
|
}
|
|
|
#ifdef F_GETFL
|
#ifdef F_GETFL
|
tflags_inferior = fcntl (0, F_GETFL, 0);
|
tflags_inferior = fcntl (0, F_GETFL, 0);
|
|
|
/* Is there a reason this is being done twice? It happens both
|
/* 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
|
places we use F_SETFL, so I'm inclined to think perhaps there
|
is some reason, however perverse. Perhaps not though... */
|
is some reason, however perverse. Perhaps not though... */
|
result = fcntl (0, F_SETFL, tflags_ours);
|
result = fcntl (0, F_SETFL, tflags_ours);
|
result = fcntl (0, F_SETFL, tflags_ours);
|
result = fcntl (0, F_SETFL, tflags_ours);
|
#endif
|
#endif
|
|
|
result = result; /* lint */
|
result = result; /* lint */
|
}
|
}
|
}
|
}
|
|
|
/* ARGSUSED */
|
/* ARGSUSED */
|
void
|
void
|
term_info (arg, from_tty)
|
term_info (arg, from_tty)
|
char *arg;
|
char *arg;
|
int from_tty;
|
int from_tty;
|
{
|
{
|
target_terminal_info (arg, from_tty);
|
target_terminal_info (arg, from_tty);
|
}
|
}
|
|
|
/* ARGSUSED */
|
/* ARGSUSED */
|
void
|
void
|
child_terminal_info (args, from_tty)
|
child_terminal_info (args, from_tty)
|
char *args;
|
char *args;
|
int from_tty;
|
int from_tty;
|
{
|
{
|
if (!gdb_has_a_terminal ())
|
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;
|
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. */
|
/* First the fcntl flags. */
|
{
|
{
|
int flags;
|
int flags;
|
|
|
flags = tflags_inferior;
|
flags = tflags_inferior;
|
|
|
printf_filtered ("File descriptor flags = ");
|
printf_filtered ("File descriptor flags = ");
|
|
|
#ifndef O_ACCMODE
|
#ifndef O_ACCMODE
|
#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
|
#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
|
#endif
|
#endif
|
/* (O_ACCMODE) parens are to avoid Ultrix header file bug */
|
/* (O_ACCMODE) parens are to avoid Ultrix header file bug */
|
switch (flags & (O_ACCMODE))
|
switch (flags & (O_ACCMODE))
|
{
|
{
|
case O_RDONLY:
|
case O_RDONLY:
|
printf_filtered ("O_RDONLY");
|
printf_filtered ("O_RDONLY");
|
break;
|
break;
|
case O_WRONLY:
|
case O_WRONLY:
|
printf_filtered ("O_WRONLY");
|
printf_filtered ("O_WRONLY");
|
break;
|
break;
|
case O_RDWR:
|
case O_RDWR:
|
printf_filtered ("O_RDWR");
|
printf_filtered ("O_RDWR");
|
break;
|
break;
|
}
|
}
|
flags &= ~(O_ACCMODE);
|
flags &= ~(O_ACCMODE);
|
|
|
#ifdef O_NONBLOCK
|
#ifdef O_NONBLOCK
|
if (flags & O_NONBLOCK)
|
if (flags & O_NONBLOCK)
|
printf_filtered (" | O_NONBLOCK");
|
printf_filtered (" | O_NONBLOCK");
|
flags &= ~O_NONBLOCK;
|
flags &= ~O_NONBLOCK;
|
#endif
|
#endif
|
|
|
#if defined (O_NDELAY)
|
#if defined (O_NDELAY)
|
/* If O_NDELAY and O_NONBLOCK are defined to the same thing, we will
|
/* 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
|
print it as O_NONBLOCK, which is good cause that is what POSIX
|
has, and the flag will already be cleared by the time we get here. */
|
has, and the flag will already be cleared by the time we get here. */
|
if (flags & O_NDELAY)
|
if (flags & O_NDELAY)
|
printf_filtered (" | O_NDELAY");
|
printf_filtered (" | O_NDELAY");
|
flags &= ~O_NDELAY;
|
flags &= ~O_NDELAY;
|
#endif
|
#endif
|
|
|
if (flags & O_APPEND)
|
if (flags & O_APPEND)
|
printf_filtered (" | O_APPEND");
|
printf_filtered (" | O_APPEND");
|
flags &= ~O_APPEND;
|
flags &= ~O_APPEND;
|
|
|
#if defined (O_BINARY)
|
#if defined (O_BINARY)
|
if (flags & O_BINARY)
|
if (flags & O_BINARY)
|
printf_filtered (" | O_BINARY");
|
printf_filtered (" | O_BINARY");
|
flags &= ~O_BINARY;
|
flags &= ~O_BINARY;
|
#endif
|
#endif
|
|
|
if (flags)
|
if (flags)
|
printf_filtered (" | 0x%x", flags);
|
printf_filtered (" | 0x%x", flags);
|
printf_filtered ("\n");
|
printf_filtered ("\n");
|
}
|
}
|
|
|
#ifdef PROCESS_GROUP_TYPE
|
#ifdef PROCESS_GROUP_TYPE
|
printf_filtered ("Process group = %d\n",
|
printf_filtered ("Process group = %d\n",
|
(int) inferior_process_group);
|
(int) inferior_process_group);
|
#endif
|
#endif
|
|
|
SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate, gdb_stdout);
|
SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate, gdb_stdout);
|
}
|
}
|
|
|
/* NEW_TTY_PREFORK is called before forking a new child process,
|
/* NEW_TTY_PREFORK is called before forking a new child process,
|
so we can record the state of ttys in the child to be formed.
|
so we can record the state of ttys in the child to be formed.
|
TTYNAME is null if we are to share the terminal with gdb;
|
TTYNAME is null if we are to share the terminal with gdb;
|
or points to a string containing the name of the desired tty.
|
or points to a string containing the name of the desired tty.
|
|
|
NEW_TTY is called in new child processes under Unix, which will
|
NEW_TTY is called in new child processes under Unix, which will
|
become debugger target processes. This actually switches to
|
become debugger target processes. This actually switches to
|
the terminal specified in the NEW_TTY_PREFORK call. */
|
the terminal specified in the NEW_TTY_PREFORK call. */
|
|
|
void
|
void
|
new_tty_prefork (ttyname)
|
new_tty_prefork (ttyname)
|
char *ttyname;
|
char *ttyname;
|
{
|
{
|
/* Save the name for later, for determining whether we and the child
|
/* Save the name for later, for determining whether we and the child
|
are sharing a tty. */
|
are sharing a tty. */
|
inferior_thisrun_terminal = ttyname;
|
inferior_thisrun_terminal = ttyname;
|
}
|
}
|
|
|
void
|
void
|
new_tty ()
|
new_tty ()
|
{
|
{
|
register int tty;
|
register int tty;
|
|
|
if (inferior_thisrun_terminal == 0)
|
if (inferior_thisrun_terminal == 0)
|
return;
|
return;
|
#if !defined(__GO32__) && !defined(_WIN32)
|
#if !defined(__GO32__) && !defined(_WIN32)
|
#ifdef TIOCNOTTY
|
#ifdef TIOCNOTTY
|
/* Disconnect the child process from our controlling terminal. On some
|
/* Disconnect the child process from our controlling terminal. On some
|
systems (SVR4 for example), this may cause a SIGTTOU, so temporarily
|
systems (SVR4 for example), this may cause a SIGTTOU, so temporarily
|
ignore SIGTTOU. */
|
ignore SIGTTOU. */
|
tty = open ("/dev/tty", O_RDWR);
|
tty = open ("/dev/tty", O_RDWR);
|
if (tty > 0)
|
if (tty > 0)
|
{
|
{
|
void (*osigttou) ();
|
void (*osigttou) ();
|
|
|
osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
|
osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
|
ioctl (tty, TIOCNOTTY, 0);
|
ioctl (tty, TIOCNOTTY, 0);
|
close (tty);
|
close (tty);
|
signal (SIGTTOU, osigttou);
|
signal (SIGTTOU, osigttou);
|
}
|
}
|
#endif
|
#endif
|
|
|
/* Now open the specified new terminal. */
|
/* Now open the specified new terminal. */
|
|
|
#ifdef USE_O_NOCTTY
|
#ifdef USE_O_NOCTTY
|
tty = open (inferior_thisrun_terminal, O_RDWR | O_NOCTTY);
|
tty = open (inferior_thisrun_terminal, O_RDWR | O_NOCTTY);
|
#else
|
#else
|
tty = open (inferior_thisrun_terminal, O_RDWR);
|
tty = open (inferior_thisrun_terminal, O_RDWR);
|
#endif
|
#endif
|
if (tty == -1)
|
if (tty == -1)
|
{
|
{
|
print_sys_errmsg (inferior_thisrun_terminal, errno);
|
print_sys_errmsg (inferior_thisrun_terminal, errno);
|
_exit (1);
|
_exit (1);
|
}
|
}
|
|
|
/* Avoid use of dup2; doesn't exist on all systems. */
|
/* Avoid use of dup2; doesn't exist on all systems. */
|
if (tty != 0)
|
if (tty != 0)
|
{
|
{
|
close (0);
|
close (0);
|
dup (tty);
|
dup (tty);
|
}
|
}
|
if (tty != 1)
|
if (tty != 1)
|
{
|
{
|
close (1);
|
close (1);
|
dup (tty);
|
dup (tty);
|
}
|
}
|
if (tty != 2)
|
if (tty != 2)
|
{
|
{
|
close (2);
|
close (2);
|
dup (tty);
|
dup (tty);
|
}
|
}
|
if (tty > 2)
|
if (tty > 2)
|
close (tty);
|
close (tty);
|
#endif /* !go32 && !win32 */
|
#endif /* !go32 && !win32 */
|
}
|
}
|
|
|
/* Kill the inferior process. Make us have no inferior. */
|
/* Kill the inferior process. Make us have no inferior. */
|
|
|
/* ARGSUSED */
|
/* ARGSUSED */
|
static void
|
static void
|
kill_command (arg, from_tty)
|
kill_command (arg, from_tty)
|
char *arg;
|
char *arg;
|
int from_tty;
|
int from_tty;
|
{
|
{
|
/* FIXME: This should not really be inferior_pid (or target_has_execution).
|
/* FIXME: This should not really be inferior_pid (or target_has_execution).
|
It should be a distinct flag that indicates that a target is active, cuz
|
It should be a distinct flag that indicates that a target is active, cuz
|
some targets don't have processes! */
|
some targets don't have processes! */
|
|
|
if (inferior_pid == 0)
|
if (inferior_pid == 0)
|
error ("The program is not being run.");
|
error ("The program is not being run.");
|
if (!query ("Kill the program being debugged? "))
|
if (!query ("Kill the program being debugged? "))
|
error ("Not confirmed.");
|
error ("Not confirmed.");
|
target_kill ();
|
target_kill ();
|
|
|
init_thread_list (); /* Destroy thread info */
|
init_thread_list (); /* Destroy thread info */
|
|
|
/* Killing off the inferior can leave us with a core file. If so,
|
/* Killing off the inferior can leave us with a core file. If so,
|
print the state we are left in. */
|
print the state we are left in. */
|
if (target_has_stack)
|
if (target_has_stack)
|
{
|
{
|
printf_filtered ("In %s,\n", target_longname);
|
printf_filtered ("In %s,\n", target_longname);
|
if (selected_frame == NULL)
|
if (selected_frame == NULL)
|
fputs_filtered ("No selected stack frame.\n", gdb_stdout);
|
fputs_filtered ("No selected stack frame.\n", gdb_stdout);
|
else
|
else
|
print_stack_frame (selected_frame, selected_frame_level, 1);
|
print_stack_frame (selected_frame, selected_frame_level, 1);
|
}
|
}
|
}
|
}
|
|
|
/* Call set_sigint_trap when you need to pass a signal on to an attached
|
/* Call set_sigint_trap when you need to pass a signal on to an attached
|
process when handling SIGINT */
|
process when handling SIGINT */
|
|
|
/* ARGSUSED */
|
/* ARGSUSED */
|
static void
|
static void
|
pass_signal (signo)
|
pass_signal (signo)
|
int signo;
|
int signo;
|
{
|
{
|
#ifndef _WIN32
|
#ifndef _WIN32
|
kill (PIDGET (inferior_pid), SIGINT);
|
kill (PIDGET (inferior_pid), SIGINT);
|
#endif
|
#endif
|
}
|
}
|
|
|
static void (*osig) ();
|
static void (*osig) ();
|
|
|
void
|
void
|
set_sigint_trap ()
|
set_sigint_trap ()
|
{
|
{
|
if (attach_flag || inferior_thisrun_terminal)
|
if (attach_flag || inferior_thisrun_terminal)
|
{
|
{
|
osig = (void (*)()) signal (SIGINT, pass_signal);
|
osig = (void (*)()) signal (SIGINT, pass_signal);
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
clear_sigint_trap ()
|
clear_sigint_trap ()
|
{
|
{
|
if (attach_flag || inferior_thisrun_terminal)
|
if (attach_flag || inferior_thisrun_terminal)
|
{
|
{
|
signal (SIGINT, osig);
|
signal (SIGINT, osig);
|
}
|
}
|
}
|
}
|
|
|
#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
|
#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
|
static void (*old_sigio) ();
|
static void (*old_sigio) ();
|
|
|
static void
|
static void
|
handle_sigio (signo)
|
handle_sigio (signo)
|
int signo;
|
int signo;
|
{
|
{
|
int numfds;
|
int numfds;
|
fd_set readfds;
|
fd_set readfds;
|
|
|
signal (SIGIO, handle_sigio);
|
signal (SIGIO, handle_sigio);
|
|
|
FD_ZERO (&readfds);
|
FD_ZERO (&readfds);
|
FD_SET (target_activity_fd, &readfds);
|
FD_SET (target_activity_fd, &readfds);
|
numfds = select (target_activity_fd + 1, &readfds, NULL, NULL, NULL);
|
numfds = select (target_activity_fd + 1, &readfds, NULL, NULL, NULL);
|
if (numfds >= 0 && FD_ISSET (target_activity_fd, &readfds))
|
if (numfds >= 0 && FD_ISSET (target_activity_fd, &readfds))
|
{
|
{
|
#ifndef _WIN32
|
#ifndef _WIN32
|
if ((*target_activity_function) ())
|
if ((*target_activity_function) ())
|
kill (inferior_pid, SIGINT);
|
kill (inferior_pid, SIGINT);
|
#endif
|
#endif
|
}
|
}
|
}
|
}
|
|
|
static int old_fcntl_flags;
|
static int old_fcntl_flags;
|
|
|
void
|
void
|
set_sigio_trap ()
|
set_sigio_trap ()
|
{
|
{
|
if (target_activity_function)
|
if (target_activity_function)
|
{
|
{
|
old_sigio = (void (*)()) signal (SIGIO, handle_sigio);
|
old_sigio = (void (*)()) signal (SIGIO, handle_sigio);
|
fcntl (target_activity_fd, F_SETOWN, getpid ());
|
fcntl (target_activity_fd, F_SETOWN, getpid ());
|
old_fcntl_flags = fcntl (target_activity_fd, F_GETFL, 0);
|
old_fcntl_flags = fcntl (target_activity_fd, F_GETFL, 0);
|
fcntl (target_activity_fd, F_SETFL, old_fcntl_flags | FASYNC);
|
fcntl (target_activity_fd, F_SETFL, old_fcntl_flags | FASYNC);
|
}
|
}
|
}
|
}
|
|
|
void
|
void
|
clear_sigio_trap ()
|
clear_sigio_trap ()
|
{
|
{
|
if (target_activity_function)
|
if (target_activity_function)
|
{
|
{
|
signal (SIGIO, old_sigio);
|
signal (SIGIO, old_sigio);
|
fcntl (target_activity_fd, F_SETFL, old_fcntl_flags);
|
fcntl (target_activity_fd, F_SETFL, old_fcntl_flags);
|
}
|
}
|
}
|
}
|
#else /* No SIGIO. */
|
#else /* No SIGIO. */
|
void
|
void
|
set_sigio_trap ()
|
set_sigio_trap ()
|
{
|
{
|
if (target_activity_function)
|
if (target_activity_function)
|
abort ();
|
abort ();
|
}
|
}
|
|
|
void
|
void
|
clear_sigio_trap ()
|
clear_sigio_trap ()
|
{
|
{
|
if (target_activity_function)
|
if (target_activity_function)
|
abort ();
|
abort ();
|
}
|
}
|
#endif /* No SIGIO. */
|
#endif /* No SIGIO. */
|
|
|
|
|
/* This is here because this is where we figure out whether we (probably)
|
/* 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
|
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.
|
setpgid or setpgrp might not exist on a system without job control.
|
It might be considered misplaced (on the other hand, process groups and
|
It might be considered misplaced (on the other hand, process groups and
|
job control are closely related to ttys).
|
job control are closely related to ttys).
|
|
|
For a more clean implementation, in libiberty, put a setpgid which merely
|
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
|
calls setpgrp and a setpgrp which does nothing (any system with job control
|
will have one or the other). */
|
will have one or the other). */
|
int
|
int
|
gdb_setpgid ()
|
gdb_setpgid ()
|
{
|
{
|
int retval = 0;
|
int retval = 0;
|
|
|
if (job_control)
|
if (job_control)
|
{
|
{
|
#if defined (NEED_POSIX_SETPGID) || (defined (HAVE_TERMIOS) && defined (HAVE_SETPGID))
|
#if defined (NEED_POSIX_SETPGID) || (defined (HAVE_TERMIOS) && defined (HAVE_SETPGID))
|
/* setpgid (0, 0) is supposed to work and mean the same thing as
|
/* setpgid (0, 0) is supposed to work and mean the same thing as
|
this, but on Ultrix 4.2A it fails with EPERM (and
|
this, but on Ultrix 4.2A it fails with EPERM (and
|
setpgid (getpid (), getpid ()) succeeds). */
|
setpgid (getpid (), getpid ()) succeeds). */
|
retval = setpgid (getpid (), getpid ());
|
retval = setpgid (getpid (), getpid ());
|
#else
|
#else
|
#if defined (TIOCGPGRP)
|
#if defined (TIOCGPGRP)
|
#if defined(USG) && !defined(SETPGRP_ARGS)
|
#if defined(USG) && !defined(SETPGRP_ARGS)
|
retval = setpgrp ();
|
retval = setpgrp ();
|
#else
|
#else
|
retval = setpgrp (getpid (), getpid ());
|
retval = setpgrp (getpid (), getpid ());
|
#endif /* USG */
|
#endif /* USG */
|
#endif /* TIOCGPGRP. */
|
#endif /* TIOCGPGRP. */
|
#endif /* NEED_POSIX_SETPGID */
|
#endif /* NEED_POSIX_SETPGID */
|
}
|
}
|
return retval;
|
return retval;
|
}
|
}
|
|
|
void
|
void
|
_initialize_inflow ()
|
_initialize_inflow ()
|
{
|
{
|
add_info ("terminal", term_info,
|
add_info ("terminal", term_info,
|
"Print inferior's saved terminal status.");
|
"Print inferior's saved terminal status.");
|
|
|
add_com ("kill", class_run, kill_command,
|
add_com ("kill", class_run, kill_command,
|
"Kill execution of program being debugged.");
|
"Kill execution of program being debugged.");
|
|
|
inferior_pid = 0;
|
inferior_pid = 0;
|
|
|
terminal_is_ours = 1;
|
terminal_is_ours = 1;
|
|
|
/* OK, figure out whether we have job control. If neither termios nor
|
/* OK, figure out whether we have job control. If neither termios nor
|
sgtty (i.e. termio or go32), leave job_control 0. */
|
sgtty (i.e. termio or go32), leave job_control 0. */
|
|
|
#if defined (HAVE_TERMIOS)
|
#if defined (HAVE_TERMIOS)
|
/* Do all systems with termios have the POSIX way of identifying job
|
/* Do all systems with termios have the POSIX way of identifying job
|
control? I hope so. */
|
control? I hope so. */
|
#ifdef _POSIX_JOB_CONTROL
|
#ifdef _POSIX_JOB_CONTROL
|
job_control = 1;
|
job_control = 1;
|
#else
|
#else
|
#ifdef _SC_JOB_CONTROL
|
#ifdef _SC_JOB_CONTROL
|
job_control = sysconf (_SC_JOB_CONTROL);
|
job_control = sysconf (_SC_JOB_CONTROL);
|
#else
|
#else
|
job_control = 0; /* have to assume the worst */
|
job_control = 0; /* have to assume the worst */
|
#endif /* _SC_JOB_CONTROL */
|
#endif /* _SC_JOB_CONTROL */
|
#endif /* _POSIX_JOB_CONTROL */
|
#endif /* _POSIX_JOB_CONTROL */
|
#endif /* HAVE_TERMIOS */
|
#endif /* HAVE_TERMIOS */
|
|
|
#ifdef HAVE_SGTTY
|
#ifdef HAVE_SGTTY
|
#ifdef TIOCGPGRP
|
#ifdef TIOCGPGRP
|
job_control = 1;
|
job_control = 1;
|
#else
|
#else
|
job_control = 0;
|
job_control = 0;
|
#endif /* TIOCGPGRP */
|
#endif /* TIOCGPGRP */
|
#endif /* sgtty */
|
#endif /* sgtty */
|
}
|
}
|
|
|
