/* Low level interface to ptrace, for GDB when running under Unix.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+ Copyright 1986-87, 1989, 1991-92, 1995, 1998 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+ This file is part of GDB.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+ 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.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
-#include "initialize.h"
-#include "param.h"
#include "frame.h"
#include "inferior.h"
-
-#include <stdio.h>
-#include <sys/param.h>
-#include <sys/dir.h>
-#ifndef UMAX_PTRACE
-#include <sys/user.h>
-#endif
+#include "command.h"
+#include "signals.h"
+#include "serial.h"
+#include "terminal.h"
+#include "target.h"
+#include "gdbthread.h"
+
+#include "gdb_string.h"
#include <signal.h>
-#include <sys/ioctl.h>
#include <fcntl.h>
-
-#ifdef UMAX_PTRACE
-#include <a.out.h>
-#include <sys/ptrace.h>
-#define PTRACE_ATTACH PT_ATTACH
-#define PTRACE_DETACH PT_FREEPROC
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
#endif
-#ifdef NEW_SUN_PTRACE
-#include <sys/ptrace.h>
-#include <machine/reg.h>
+#ifdef HAVE_TERMIOS
+#define PROCESS_GROUP_TYPE pid_t
#endif
-#ifdef HP9K320
-#include <sys/ptrace.h>
-#include <sys/reg.h>
-#include <sys/trap.h>
+#ifdef HAVE_TERMIO
+#define PROCESS_GROUP_TYPE int
#endif
-#ifdef HAVE_TERMIO
-#include <termio.h>
-#undef TIOCGETP
-#define TIOCGETP TCGETA
-#undef TIOCSETN
-#define TIOCSETN TCSETA
-#undef TIOCSETP
-#define TIOCSETP TCSETAF
-#define TERMINAL struct termio
+#ifdef HAVE_SGTTY
+#ifdef SHORT_PGRP
+/* This is only used for the ultra. Does it have pid_t? */
+#define PROCESS_GROUP_TYPE short
#else
-#include <sgtty.h>
-#define TERMINAL struct sgttyb
+#define PROCESS_GROUP_TYPE int
#endif
+#endif /* sgtty */
-extern int errno;
+#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
+static void
+handle_sigio PARAMS ((int));
+#endif
-/* Nonzero if we are debugging an attached outside process
- rather than an inferior. */
+extern void _initialize_inflow PARAMS ((void));
+
+static void
+pass_signal PARAMS ((int));
-static int attach_flag;
+static void
+kill_command PARAMS ((char *, int));
-START_FILE
+static void
+terminal_ours_1 PARAMS ((int));
\f
/* Record terminal status separately for debugger and inferior. */
-static TERMINAL sg_inferior;
-static TERMINAL sg_ours;
+static serial_t stdin_serial;
+
+/* TTY state for the inferior. We save it whenever the inferior stops, and
+ restore it when it resumes. */
+static serial_ttystate inferior_ttystate;
+
+/* Our own tty state, which we restore every time we need to deal with the
+ terminal. We only set it once, when GDB first starts. The settings of
+ flags which readline saves and restores and unimportant. */
+static serial_ttystate our_ttystate;
+
+/* fcntl flags for us and the inferior. Saved and restored just like
+ {our,inferior}_ttystate. */
static int tflags_inferior;
static int tflags_ours;
-#ifdef TIOCGLTC
-static struct tchars tc_inferior;
-static struct tchars tc_ours;
-static struct ltchars ltc_inferior;
-static struct ltchars ltc_ours;
-static int lmode_inferior;
-static int lmode_ours;
-#endif /* TIOCGLTC */
+#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
-#ifdef TIOCGPGRP
-static int pgrp_inferior;
-static int pgrp_ours;
-#else
-static int (*sigint_ours) ();
-static int (*sigquit_ours) ();
-#endif /* TIOCGPGRP */
+/* 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. */
-/* Copy of inferior_io_terminal when inferior was last started. */
static char *inferior_thisrun_terminal;
-static void terminal_ours_1 ();
+/* Nonzero if our terminal settings are in effect. Zero if the
+ inferior's settings are in effect. Ignored if !gdb_has_a_terminal
+ (). */
+
+int terminal_is_ours;
+
+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 ()
+{
+ switch (gdb_has_a_terminal_flag)
+ {
+ case yes:
+ return 1;
+ 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. */
+
+#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);
+
+ if (our_ttystate != NULL)
+ {
+ 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;
+ }
+}
+
+/* Macro for printing errors from ioctl operations */
+
+#define OOPSY(what) \
+ if (result == -1) \
+ fprintf_unfiltered(gdb_stderr, "[%s failed in terminal_inferior: %s]\n", \
+ what, strerror (errno))
-/* Nonzero if our terminal settings are in effect.
- Zero if the inferior's settings are in effect. */
-static int terminal_is_ours;
+static void terminal_ours_1 PARAMS ((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 (pgrp)
+ int pgrp;
{
- if (remote_debugging)
- return;
-
- sg_inferior = sg_ours;
- tflags_inferior = tflags_ours;
-
-#ifdef TIOCGLTC
- tc_inferior = tc_ours;
- ltc_inferior = ltc_ours;
- lmode_inferior = lmode_ours;
-#endif /* TIOCGLTC */
+ 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 (inferior_ttystate)
+ free (inferior_ttystate);
+ inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+
+#ifdef PROCESS_GROUP_TYPE
+ inferior_process_group = pgrp;
+#endif
-#ifdef TIOCGPGRP
- pgrp_inferior = inferior_pid;
-#endif /* TIOCGPGRP */
+ /* 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. */
+ terminal_is_ours = 1;
+ }
+}
- terminal_is_ours = 1;
+void
+terminal_init_inferior ()
+{
+#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_pid to the same routine). */
+ /* We assume INFERIOR_PID is also the child's process group. */
+ terminal_init_inferior_with_pgrp (PIDGET (inferior_pid));
+#endif /* PROCESS_GROUP_TYPE */
}
/* Put the inferior's terminal settings into effect.
void
terminal_inferior ()
{
- if (remote_debugging)
- return;
-
- if (terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
+ if (gdb_has_a_terminal () && terminal_is_ours
+ && inferior_thisrun_terminal == 0)
{
- fcntl (0, F_SETFL, tflags_inferior);
- fcntl (0, F_SETFL, tflags_inferior);
- ioctl (0, TIOCSETN, &sg_inferior);
+ 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... */
+ result = fcntl (0, F_SETFL, tflags_inferior);
+ result = fcntl (0, F_SETFL, tflags_inferior);
+ OOPSY ("fcntl F_SETFL");
+#endif
-#ifdef TIOCGLTC
- ioctl (0, TIOCSETC, &tc_inferior);
- ioctl (0, TIOCSLTC, <c_inferior);
- ioctl (0, TIOCLSET, &lmode_inferior);
-#endif /* TIOCGLTC */
+ /* 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);
+ 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 the tty state, but ignore errors
+ setting the process group, which will happen if we are not
+ sharing a terminal). */
+
+ if (job_control)
+ {
+#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
+ }
-#ifdef TIOCGPGRP
- ioctl (0, TIOCSPGRP, &pgrp_inferior);
-#else
- sigint_ours = (signal (SIGINT, SIG_IGN));
- sigquit_ours = (signal (SIGQUIT, SIG_IGN));
-#endif /* TIOCGPGRP */
}
terminal_is_ours = 0;
}
void
terminal_ours_for_output ()
{
- if (remote_debugging)
- return;
-
terminal_ours_1 (1);
}
void
terminal_ours ()
{
- if (remote_debugging)
- return;
-
terminal_ours_1 (0);
}
+/* output_only is not used, and should not be used unless we introduce
+ separate terminal_is_ours and terminal_is_ours_for_output
+ flags. */
+
static void
terminal_ours_1 (output_only)
int output_only;
{
-#ifdef TIOCGPGRP
- /* Ignore this signal since it will happen when we try to set the pgrp. */
- int (*osigttou) ();
-#endif /* TIOCGPGRP */
+ /* Checking inferior_thisrun_terminal is necessary so that
+ if GDB is running in the background, it won't block trying
+ to do the ioctl()'s below. Checking gdb_has_a_terminal
+ avoids attempting all the ioctl's when running in batch. */
+ if (inferior_thisrun_terminal != 0 || gdb_has_a_terminal () == 0)
+ return;
- if (!terminal_is_ours) /* && inferior_thisrun_terminal == 0) */
+ if (!terminal_is_ours)
{
- terminal_is_ours = 1;
-
-#ifdef TIOCGPGRP
- osigttou = signal (SIGTTOU, SIG_IGN);
-
- ioctl (0, TIOCGPGRP, &pgrp_inferior);
- ioctl (0, TIOCSPGRP, &pgrp_ours);
-
- signal (SIGTTOU, osigttou);
-#else
- signal (SIGINT, sigint_ours);
- signal (SIGQUIT, sigquit_ours);
-#endif /* TIOCGPGRP */
+ /* Ignore this signal since it will happen when we try to set the
+ pgrp. */
+ void (*osigttou) ();
+ int result;
- tflags_inferior = fcntl (0, F_GETFL, 0);
- ioctl (0, TIOCGETP, &sg_inferior);
-
-#ifdef TIOCGLTC
- ioctl (0, TIOCGETC, &tc_inferior);
- ioctl (0, TIOCGLTC, <c_inferior);
- ioctl (0, TIOCLGET, &lmode_inferior);
-#endif /* TIOCGLTC */
- }
-
-#ifdef HAVE_TERMIO
- sg_ours.c_lflag |= ICANON;
- if (output_only && !(sg_inferior.c_lflag & ICANON))
- sg_ours.c_lflag &= ~ICANON;
-#else /* not HAVE_TERMIO */
- sg_ours.sg_flags &= ~RAW & ~CBREAK;
- if (output_only)
- sg_ours.sg_flags |= (RAW | CBREAK) & sg_inferior.sg_flags;
-#endif /* not HAVE_TERMIO */
-
- fcntl (0, F_SETFL, tflags_ours);
- fcntl (0, F_SETFL, tflags_ours);
- ioctl (0, TIOCSETN, &sg_ours);
-
-#ifdef TIOCGLTC
- ioctl (0, TIOCSETC, &tc_ours);
- ioctl (0, TIOCSLTC, <c_ours);
- ioctl (0, TIOCLSET, &lmode_ours);
-#endif /* TIOCGLTC */
+ terminal_is_ours = 1;
+#ifdef SIGTTOU
+ if (job_control)
+ osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
+#endif
+ if (inferior_ttystate)
+ free (inferior_ttystate);
+ inferior_ttystate = SERIAL_GET_TTY_STATE (stdin_serial);
+#ifdef HAVE_TERMIOS
+ inferior_process_group = tcgetpgrp (0);
+#endif
#ifdef HAVE_TERMIO
- sg_ours.c_lflag |= ICANON;
-#else /* not HAVE_TERMIO */
- sg_ours.sg_flags &= ~RAW & ~CBREAK;
-#endif /* not HAVE_TERMIO */
-}
-
-static void
-term_status_command ()
-{
- register int i;
-
- if (remote_debugging)
- {
- printf ("No terminal status when remote debugging.\n");
- return;
- }
+ inferior_process_group = getpgrp ();
+#endif
+#ifdef HAVE_SGTTY
+ ioctl (0, TIOCGPGRP, &inferior_process_group);
+#endif
- printf ("Inferior's terminal status (currently saved by GDB):\n");
+ /* 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.
+ 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). */
-#ifdef HAVE_TERMIO
+ /* 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.
+ */
- printf ("fcntl flags = 0x%x, c_iflag = 0x%x, c_oflag = 0x%x,\n",
- tflags_inferior, sg_inferior.c_iflag, sg_inferior.c_oflag);
- printf ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
- sg_inferior.c_cflag, sg_inferior.c_lflag, sg_inferior.c_line);
- printf ("c_cc: ");
- for (i = 0; (i < NCC); i += 1)
- printf ("0x%x ", sg_inferior.c_cc[i]);
- printf ("\n");
-
-#else /* not HAVE_TERMIO */
-
- printf ("fcntl flags = 0x%x, lmode = 0x%x,\nsgttyb.sg_flags = 0x%x, owner pid = %d.\n",
- tflags_inferior, lmode_inferior,
- sg_inferior.sg_flags, pgrp_inferior);
- printf ("tchars: ");
- for (i = 0; i < sizeof (struct tchars); i++)
- printf ("0x%x ", ((char *)&tc_inferior)[i]);
- printf ("\n");
- printf ("ltchars: ");
- for (i = 0; i < sizeof (struct ltchars); i++)
- printf ("0x%x ", ((char *)<c_inferior)[i]);
-
-#endif /* not HAVE_TERMIO */
-}
-\f
-static void
-new_tty (ttyname)
- char *ttyname;
-{
- register int tty;
- register int fd;
+ 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
- /* I think it is better not to do this. Then C-z on the GDB terminal
- will still stop the program, while C-z on the data terminal
- will be input. */
-
- /* Disconnect the child process from our controlling terminal. */
- tty = open("/dev/tty", O_RDWR);
- if (tty > 0)
- {
- ioctl(tty, TIOCNOTTY, 0);
- close(tty);
- }
+ /* 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",
+ strerror (errno));
#endif
- /* Now open the specified new terminal. */
-
- tty = open(ttyname, O_RDWR);
- if (tty == -1)
- _exit(1);
-
- dup2(tty, 0);
- dup2(tty, 1);
- dup2(tty, 2);
- close(tty);
-}
-\f
-/* Start an inferior process and returns its pid.
- ALLARGS is a string containing shell command to run the program.
- ENV is the environment vector to pass. */
+#endif /* termios */
-#ifndef SHELL_FILE
-#define SHELL_FILE "/bin/sh"
+#ifdef HAVE_SGTTY
+ result = ioctl (0, TIOCSPGRP, &our_process_group);
#endif
+ }
-int
-create_inferior (allargs, env)
- char *allargs;
- char **env;
-{
- int pid;
- char *shell_command;
- extern int sys_nerr;
- extern char *sys_errlist[];
- extern int errno;
-
- /* If desired, concat something onto the front of ALLARGS.
- SHELL_COMMAND is the result. */
-#ifdef SHELL_COMMAND_CONCAT
- shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + strlen (allargs) + 1);
- strcpy (shell_command, SHELL_COMMAND_CONCAT);
- strcat (shell_command, allargs);
-#else
- shell_command = allargs;
+#ifdef SIGTTOU
+ if (job_control)
+ signal (SIGTTOU, osigttou);
#endif
- /* exec is said to fail if the executable is open. */
- close_exec_file ();
-
- pid = vfork ();
- if (pid < 0)
- perror_with_name ("vfork");
-
- if (pid == 0)
- {
- char *args[4];
-
-#ifdef TIOCGPGRP
- /* Run inferior in a separate process group. */
- setpgrp (getpid (), getpid ());
-#endif /* TIOCGPGRP */
-
- inferior_thisrun_terminal = inferior_io_terminal;
- if (inferior_io_terminal != 0)
- new_tty (inferior_io_terminal);
-
-/* Not needed on Sun, at least, and loses there
- because it clobbers the superior. */
-/*??? signal (SIGQUIT, SIG_DFL);
- signal (SIGINT, SIG_DFL); */
-
- ptrace (0);
+ if (!job_control)
+ {
+ signal (SIGINT, sigint_ours);
+#ifdef SIGQUIT
+ signal (SIGQUIT, sigquit_ours);
+#endif
+ }
- args[0] = "sh";
- args[1] = "-c";
- args[2] = shell_command;
- args[3] = 0;
+#ifdef F_GETFL
+ tflags_inferior = fcntl (0, F_GETFL, 0);
- execve (SHELL_FILE, args, env);
+ /* 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... */
+ result = fcntl (0, F_SETFL, tflags_ours);
+ result = fcntl (0, F_SETFL, tflags_ours);
+#endif
- fprintf (stderr, "Cannot exec %s: %s.\n", SHELL_FILE,
- errno < sys_nerr ? sys_errlist[errno] : "unknown error");
- fflush (stderr);
- _exit (0177);
+ result = result; /* lint */
}
- return pid;
}
-/* Kill the inferior process. Make us have no inferior. */
-
-static void
-kill_command ()
+/* ARGSUSED */
+void
+term_info (arg, from_tty)
+ char *arg;
+ int from_tty;
{
- if (remote_debugging)
- return;
- if (inferior_pid == 0)
- error ("The program is not being run.");
- if (!query ("Kill the inferior process? "))
- error ("Not confirmed.");
- kill_inferior ();
+ target_terminal_info (arg, from_tty);
}
-kill_inferior ()
+/* ARGSUSED */
+void
+child_terminal_info (args, from_tty)
+ char *args;
+ int from_tty;
{
- if (remote_debugging)
- return;
- if (inferior_pid == 0)
- return;
- ptrace (8, inferior_pid, 0, 0);
- wait (0);
- inferior_died ();
-}
+ if (!gdb_has_a_terminal ())
+ {
+ printf_filtered ("This GDB does not control a terminal.\n");
+ return;
+ }
-/* This is used when GDB is exiting. It gives less chance of error.*/
+ printf_filtered ("Inferior's terminal status (currently saved by GDB):\n");
-kill_inferior_fast ()
-{
- if (remote_debugging)
- return;
- if (inferior_pid == 0)
- return;
- ptrace (8, inferior_pid, 0, 0);
- wait (0);
-}
+ /* First the fcntl flags. */
+ {
+ int flags;
-inferior_died ()
-{
- inferior_pid = 0;
- attach_flag = 0;
- mark_breakpoints_out ();
- reopen_exec_file ();
- if (have_core_file_p ())
- set_current_frame (read_register (FP_REGNUM));
-}
+ flags = tflags_inferior;
-/* Resume execution of the inferior process.
- If STEP is nonzero, single-step it.
- If SIGNAL is nonzero, give it that signal. */
+ printf_filtered ("File descriptor flags = ");
-void
-resume (step, signal)
- int step;
- int signal;
-{
- errno = 0;
- if (remote_debugging)
- remote_resume (step, signal);
- else
- {
-#ifdef NO_SINGLE_STEP
- if (step)
- {
- single_step (signal);
- }
- else ptrace (7, inferior_pid, 1, signal);
-#else
- ptrace (step ? 9 : 7, inferior_pid, 1, signal);
+#ifndef O_ACCMODE
+#define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR)
+#endif
+ /* (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;
+ }
+ flags &= ~(O_ACCMODE);
+
+#ifdef O_NONBLOCK
+ if (flags & O_NONBLOCK)
+ printf_filtered (" | O_NONBLOCK");
+ flags &= ~O_NONBLOCK;
#endif
- if (errno)
- perror_with_name ("ptrace");
- }
-}
-\f
-#ifdef ATTACH_DETACH
-/* Start debugging the process whose number is PID. */
+#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
+ has, and the flag will already be cleared by the time we get here. */
+ if (flags & O_NDELAY)
+ printf_filtered (" | O_NDELAY");
+ flags &= ~O_NDELAY;
+#endif
-attach (pid)
- int pid;
-{
- errno = 0;
- ptrace (PTRACE_ATTACH, pid, 0, 0);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 1;
- return pid;
-}
+ if (flags & O_APPEND)
+ printf_filtered (" | O_APPEND");
+ flags &= ~O_APPEND;
-/* Stop debugging the process whose number is PID
- and continue it with signal number SIGNAL.
- SIGNAL = 0 means just continue it. */
+#if defined (O_BINARY)
+ if (flags & O_BINARY)
+ printf_filtered (" | O_BINARY");
+ flags &= ~O_BINARY;
+#endif
-void
-detach (signal)
- int signal;
-{
- errno = 0;
- ptrace (PTRACE_DETACH, inferior_pid, 1, signal);
- if (errno)
- perror_with_name ("ptrace");
- attach_flag = 0;
+ if (flags)
+ printf_filtered (" | 0x%x", flags);
+ printf_filtered ("\n");
+ }
+
+#ifdef PROCESS_GROUP_TYPE
+ printf_filtered ("Process group = %d\n", inferior_process_group);
+#endif
+
+ SERIAL_PRINT_TTY_STATE (stdin_serial, inferior_ttystate, gdb_stdout);
}
-#endif /* ATTACH_DETACH */
\f
-#ifdef NEW_SUN_PTRACE
+/* 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.
+ TTYNAME is null if we are to share the terminal with gdb;
+ or points to a string containing the name of the desired tty.
+
+ NEW_TTY is called in new child processes under Unix, which will
+ become debugger target processes. This actually switches to
+ the terminal specified in the NEW_TTY_PREFORK call. */
void
-fetch_inferior_registers ()
+new_tty_prefork (ttyname)
+ char *ttyname;
{
- struct regs inferior_registers;
- struct fp_status inferior_fp_registers;
- extern char registers[];
-
- if (remote_debugging)
- remote_fetch_registers (registers);
- else
- {
- ptrace (PTRACE_GETREGS, inferior_pid, &inferior_registers);
- ptrace (PTRACE_GETFPREGS, inferior_pid, &inferior_fp_registers);
-
-#if defined(sun2) || defined(sun3)
- bcopy (&inferior_registers, registers, 16 * 4);
- bcopy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
- sizeof inferior_fp_registers.fps_regs);
- *(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
- *(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
- bcopy (&inferior_fp_registers.fps_control,
- ®isters[REGISTER_BYTE (FPC_REGNUM)],
- sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
-#endif
-#if defined(sun4)
- registers[REGISTER_BYTE (0)] = 0;
- bcopy (&inferior_registers.r_g1, ®isters[REGISTER_BYTE (1)], 15 * 4);
- bcopy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
- sizeof inferior_fp_registers.fpu_fr);
- *(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
- *(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
- *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = inferior_registers.r_npc;
- *(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y;
-/* *(int *)®isters[REGISTER_BYTE (RP_REGNUM)] =
- inferior_registers.r_o7 + 8;
- bcopy (&inferior_fp_registers.Fpu_fsr,
- ®isters[REGISTER_BYTE (FPS_REGNUM)],
- sizeof (FPU_FSR_TYPE)); */
- read_inferior_memory (inferior_registers.r_sp,
- ®isters[REGISTER_BYTE (16)],
- 16*4);
-#endif
- }
+ /* Save the name for later, for determining whether we and the child
+ are sharing a tty. */
+ inferior_thisrun_terminal = ttyname;
}
-/* Store our register values back into the inferior.
- If REGNO is -1, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
-
-store_inferior_registers (regno)
- int regno;
+void
+new_tty ()
{
- struct regs inferior_registers;
- struct fp_status inferior_fp_registers;
- extern char registers[];
+ register int tty;
- if (remote_debugging)
- remote_store_registers (registers);
- else
+ if (inferior_thisrun_terminal == 0)
+ return;
+#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);
+ if (tty > 0)
{
- int in_regs = 1, in_fpregs = 1, in_fparegs, in_cpregs = 1;
-
-#if defined(sun2) || defined(sun3)
- if (in_regs)
- {
- bcopy (registers, &inferior_registers, 16 * 4);
- inferior_registers.r_ps = *(int *)®isters[REGISTER_BYTE (PS_REGNUM)];
- inferior_registers.r_pc = *(int *)®isters[REGISTER_BYTE (PC_REGNUM)];
- }
- if (in_fpregs)
- {
- bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
- sizeof inferior_fp_registers.fps_regs);
- bcopy (®isters[REGISTER_BYTE (FPC_REGNUM)],
- &inferior_fp_registers.fps_control,
- sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
- }
- if (in_regs)
- ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
- if (in_fpregs)
- ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
-#endif
-#if defined(sun4)
- if (regno >= 0)
- if (FP0_REGNUM <= regno && regno <= FP0_REGNUM + 32)
- in_regs = 0;
- else
- in_fpregs = 0;
-
- if (in_regs)
- {
- bcopy (®isters[REGISTER_BYTE (1)], &inferior_registers.r_g1, 15 * 4);
- inferior_registers.r_ps = *(int *)®isters[REGISTER_BYTE (PS_REGNUM)];
- inferior_registers.r_pc = *(int *)®isters[REGISTER_BYTE (PC_REGNUM)];
- inferior_registers.r_npc = *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)];
- inferior_registers.r_y = *(int *)®isters[REGISTER_BYTE (Y_REGNUM)];
- write_inferior_memory (*(int *)®isters[REGISTER_BYTE (SP_REGNUM)],
- ®isters[REGISTER_BYTE (16)],
- 16*4);
- }
- if (in_fpregs)
- {
- bcopy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
- sizeof inferior_fp_registers.fpu_fr);
- /* bcopy (®isters[REGISTER_BYTE (FPS_REGNUM)],
- &inferior_fp_registers.Fpu_fsr,
- sizeof (FPU_FSR_TYPE));
- ****/
- }
+ void (*osigttou) ();
- if (in_regs)
- ptrace (PTRACE_SETREGS, inferior_pid, &inferior_registers);
- if (in_fpregs)
- ptrace (PTRACE_SETFPREGS, inferior_pid, &inferior_fp_registers);
-#endif
+ osigttou = (void (*)()) signal (SIGTTOU, SIG_IGN);
+ ioctl (tty, TIOCNOTTY, 0);
+ close (tty);
+ signal (SIGTTOU, osigttou);
}
-}
-
-#else
-#ifdef HP9K320
-
-#define FP_REGISTER_ADDR_DIFF(u, regno) \
- (((char *) (FP_REGISTER_ADDR (u, regno))) - ((char *) &(u)))
+#endif
-#define INFERIOR_AR0(u) \
- ((ptrace \
- (PT_RUAREA, inferior_pid, ((char *) &u.u_ar0 - (char *) &u), 0)) \
- - KERNEL_U_ADDR)
+ /* Now open the specified new terminal. */
-static void
-fetch_inferior_register (regno, regaddr)
- register int regno;
- register unsigned int regaddr;
-{
-#ifndef HPUX_VERSION_5
- if (regno == PS_REGNUM)
+#ifdef USE_O_NOCTTY
+ tty = open (inferior_thisrun_terminal, O_RDWR | O_NOCTTY);
+#else
+ tty = open (inferior_thisrun_terminal, O_RDWR);
+#endif
+ if (tty == -1)
{
- union { int i; short s[2]; } ps_val;
- int regval;
+ print_sys_errmsg (inferior_thisrun_terminal, errno);
+ _exit (1);
+ }
- ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
- regval = ps_val.s[0];
- supply_register (regno, ®val);
+ /* Avoid use of dup2; doesn't exist on all systems. */
+ if (tty != 0)
+ {
+ close (0);
+ dup (tty);
}
- else
-#endif /* not HPUX_VERSION_5 */
+ if (tty != 1)
{
- char buf[MAX_REGISTER_RAW_SIZE];
- register int i;
-
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- *(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid, regaddr, 0);
- regaddr += sizeof (int);
- }
- supply_register (regno, buf);
+ close (1);
+ dup (tty);
}
- return;
-}
-
-static void
-store_inferior_register_1 (regno, regaddr, value)
- int regno;
- unsigned int regaddr;
- int value;
-{
- errno = 0;
- ptrace (PT_WUAREA, inferior_pid, regaddr, value);
-#if 0
- /* HP-UX randomly sets errno to non-zero for regno == 25.
- However, the value is correctly written, so ignore errno. */
- if (errno != 0)
+ if (tty != 2)
{
- char string_buf[64];
-
- sprintf (string_buf, "writing register number %d", regno);
- perror_with_name (string_buf);
+ close (2);
+ dup (tty);
}
-#endif
- return;
+ if (tty > 2)
+ close (tty);
+#endif /* !go32 && !win32 */
}
+\f
+/* Kill the inferior process. Make us have no inferior. */
+/* ARGSUSED */
static void
-store_inferior_register (regno, regaddr)
- register int regno;
- register unsigned int regaddr;
+kill_command (arg, from_tty)
+ char *arg;
+ int from_tty;
{
-#ifndef HPUX_VERSION_5
- if (regno == PS_REGNUM)
- {
- union { int i; short s[2]; } ps_val;
+ /* 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
+ some targets don't have processes! */
- ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
- ps_val.s[0] = (read_register (regno));
- store_inferior_register_1 (regno, regaddr, ps_val.i);
- }
- else
-#endif /* not HPUX_VERSION_5 */
- {
- char buf[MAX_REGISTER_RAW_SIZE];
- register int i;
- extern char registers[];
+ if (inferior_pid == 0)
+ error ("The program is not being run.");
+ if (!query ("Kill the program being debugged? "))
+ error ("Not confirmed.");
+ target_kill ();
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- store_inferior_register_1
- (regno, regaddr,
- (*(int *) ®isters[(REGISTER_BYTE (regno)) + i]));
- regaddr += sizeof (int);
- }
+ 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", target_longname);
+ if (selected_frame == NULL)
+ fputs_filtered ("No selected stack frame.\n", gdb_stdout);
+ else
+ print_stack_frame (selected_frame, selected_frame_level, 1);
}
- return;
}
+\f
+/* Call set_sigint_trap when you need to pass a signal on to an attached
+ process when handling SIGINT */
-void
-fetch_inferior_registers ()
+/* ARGSUSED */
+static void
+pass_signal (signo)
+ int signo;
{
- struct user u;
- register int regno;
- register unsigned int ar0_offset;
-
- ar0_offset = (INFERIOR_AR0 (u));
- for (regno = 0; (regno < FP0_REGNUM); regno++)
- fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
- for (; (regno < NUM_REGS); regno++)
- fetch_inferior_register (regno, (FP_REGISTER_ADDR_DIFF (u, regno)));
+#ifndef _WIN32
+ kill (PIDGET (inferior_pid), SIGINT);
+#endif
}
-/* Store our register values back into the inferior.
- If REGNO is -1, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
+static void (*osig) ();
-store_inferior_registers (regno)
- register int regno;
+void
+set_sigint_trap ()
{
- struct user u;
- register unsigned int ar0_offset;
-
- if (regno >= FP0_REGNUM)
+ if (attach_flag || inferior_thisrun_terminal)
{
- store_inferior_register (regno, (FP_REGISTER_ADDR_DIFF (u, regno)));
- return;
+ osig = (void (*)()) signal (SIGINT, pass_signal);
}
+}
- ar0_offset = (INFERIOR_AR0 (u));
- if (regno >= 0)
+void
+clear_sigint_trap ()
+{
+ if (attach_flag || inferior_thisrun_terminal)
{
- store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
- return;
+ signal (SIGINT, osig);
}
-
- for (regno = 0; (regno < FP0_REGNUM); regno++)
- store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
- for (; (regno < NUM_REGS); regno++)
- store_inferior_register (regno, (FP_REGISTER_ADDR_DIFF (u, regno)));
- return;
}
+\f
+#if defined (SIGIO) && defined (FASYNC) && defined (FD_SET) && defined (F_SETOWN)
+static void (*old_sigio) ();
-#else /* not HP9K320 */
-
-void
-fetch_inferior_registers ()
+static void
+handle_sigio (signo)
+ int signo;
{
- register int regno;
- register unsigned int regaddr;
- char buf[MAX_REGISTER_RAW_SIZE];
- register int i;
+ int numfds;
+ fd_set readfds;
-#ifdef UMAX_PTRACE
- unsigned int offset = 0;
-#else
- struct user u;
- unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
- offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR;
-#endif
+ signal (SIGIO, handle_sigio);
- for (regno = 0; regno < NUM_REGS; regno++)
+ FD_ZERO (&readfds);
+ FD_SET (target_activity_fd, &readfds);
+ numfds = select (target_activity_fd + 1, &readfds, NULL, NULL, NULL);
+ if (numfds >= 0 && FD_ISSET (target_activity_fd, &readfds))
{
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
- {
- *(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
- regaddr += sizeof (int);
- }
- supply_register (regno, buf);
+#ifndef _WIN32
+ if ((*target_activity_function) ())
+ kill (inferior_pid, SIGINT);
+#endif
}
}
-/* Store our register values back into the inferior.
- If REGNO is -1, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
+static int old_fcntl_flags;
-store_inferior_registers (regno)
- int regno;
+void
+set_sigio_trap ()
{
- register unsigned int regaddr;
- char buf[80];
- extern char registers[];
- int i;
-
-#ifdef UMAX_PTRACE
- unsigned int offset = 0;
-#else
- struct user u;
- unsigned int offset = (char *) &u.u_ar0 - (char *) &u;
- offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR;
-#endif
-
- if (regno >= 0)
- {
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
- {
- errno = 0;
- ptrace (6, inferior_pid, regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i]);
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d(%d)", regno, i);
- perror_with_name (buf);
- }
- regaddr += sizeof(int);
- }
- }
- else for (regno = 0; regno < NUM_REGS; regno++)
+ if (target_activity_function)
{
- regaddr = register_addr (regno, offset);
- for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof(int))
- {
- errno = 0;
- ptrace (6, inferior_pid, regaddr,
- *(int *) ®isters[REGISTER_BYTE (regno) + i]);
- if (errno != 0)
- {
- sprintf (buf, "writing register number %d(%d)", regno, i);
- perror_with_name (buf);
- }
- regaddr += sizeof(int);
- }
+ 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);
}
}
-#endif /* not HP9K320 */
-#endif /* not NEW_SUN_PTRACE */
-\f
-/* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
- in the NEW_SUN_PTRACE case.
- It ought to be straightforward. But it appears that writing did
- not write the data that I specified. I cannot understand where
- it got the data that it actually did write. */
-
-/* Copy LEN bytes from inferior's memory starting at MEMADDR
- to debugger memory starting at MYADDR. */
-
-read_inferior_memory (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
+void
+clear_sigio_trap ()
{
- register int i;
- /* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & - sizeof (int);
- /* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
- /* Allocate buffer of that many longwords. */
- register int *buffer = (int *) alloca (count * sizeof (int));
-
- /* Read all the longwords */
- for (i = 0; i < count; i++, addr += sizeof (int))
+ if (target_activity_function)
{
- if (remote_debugging)
- buffer[i] = remote_fetch_word (addr);
- else
- buffer[i] = ptrace (1, inferior_pid, addr, 0);
+ signal (SIGIO, old_sigio);
+ fcntl (target_activity_fd, F_SETFL, old_fcntl_flags);
}
+}
+#else /* No SIGIO. */
+void
+set_sigio_trap ()
+{
+ if (target_activity_function)
+ abort ();
+}
- /* Copy appropriate bytes out of the buffer. */
- bcopy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
+void
+clear_sigio_trap ()
+{
+ if (target_activity_function)
+ abort ();
}
+#endif /* No SIGIO. */
+\f
-/* Copy LEN bytes of data from debugger memory at MYADDR
- to inferior's memory at MEMADDR.
- On failure (cannot write the inferior)
- returns the value of errno. */
+/* 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
-write_inferior_memory (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
+gdb_setpgid ()
{
- register int i;
- /* Round starting address down to longword boundary. */
- register CORE_ADDR addr = memaddr & - sizeof (int);
- /* Round ending address up; get number of longwords that makes. */
- register int count
- = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
- /* Allocate buffer of that many longwords. */
- register int *buffer = (int *) alloca (count * sizeof (int));
- extern int errno;
-
- /* Fill start and end extra bytes of buffer with existing memory data. */
-
- if (remote_debugging)
- buffer[0] = remote_fetch_word (addr);
- else
- buffer[0] = ptrace (1, inferior_pid, addr, 0);
-
- if (count > 1)
- {
- if (remote_debugging)
- buffer[count - 1]
- = remote_fetch_word (addr + (count - 1) * sizeof (int));
- else
- buffer[count - 1]
- = ptrace (1, inferior_pid,
- addr + (count - 1) * sizeof (int), 0);
- }
-
- /* Copy data to be written over corresponding part of buffer */
-
- bcopy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
-
- /* Write the entire buffer. */
+ int retval = 0;
- for (i = 0; i < count; i++, addr += sizeof (int))
+ if (job_control)
{
- errno = 0;
- if (remote_debugging)
- remote_store_word (addr, buffer[i]);
- else
- ptrace (4, inferior_pid, addr, buffer[i]);
- if (errno)
- return errno;
+#if defined (NEED_POSIX_SETPGID) || (defined (HAVE_TERMIOS) && defined (HAVE_SETPGID))
+ /* 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 0;
+ return retval;
}
-\f
-static void
-try_writing_regs_command ()
-{
- register int i;
- register int value;
- extern int errno;
- if (inferior_pid == 0)
- error ("There is no inferior process now.");
-
- for (i = 0; ; i += 2)
- {
- QUIT;
- errno = 0;
- value = ptrace (3, inferior_pid, i, 0);
- ptrace (6, inferior_pid, i, value);
- if (errno == 0)
- {
- printf (" Succeeded with address 0x%x; value 0x%x (%d).\n",
- i, value, value);
- }
- else if ((i & 0377) == 0)
- printf (" Failed at 0x%x.\n", i);
- }
-}
-\f
-static
-initialize ()
+void
+_initialize_inflow ()
{
- add_com ("term-status", class_obscure, term_status_command,
- "Print info on inferior's saved terminal status.");
-
- add_com ("try-writing-regs", class_obscure, try_writing_regs_command,
- "Try writing all locations in inferior's system block.\n\
-Report which ones can be written.");
+ add_info ("terminal", term_info,
+ "Print inferior's saved terminal status.");
add_com ("kill", class_run, kill_command,
"Kill execution of program being debugged.");
inferior_pid = 0;
- ioctl (0, TIOCGETP, &sg_ours);
- fcntl (0, F_GETFL, tflags_ours);
+ terminal_is_ours = 1;
-#ifdef TIOCGLTC
- ioctl (0, TIOCGETC, &tc_ours);
- ioctl (0, TIOCGLTC, <c_ours);
- ioctl (0, TIOCLGET, &lmode_ours);
-#endif /* TIOCGLTC */
+ /* 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
- ioctl (0, TIOCGPGRP, &pgrp_ours);
+ job_control = 1;
+#else
+ job_control = 0;
#endif /* TIOCGPGRP */
-
- terminal_is_ours = 1;
+#endif /* sgtty */
}
-
-END_FILE
projects / thirdparty / binutils-gdb.git / blobdiff