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156525114c
This commit moves a few bits responsible for dealing with inferior job control from GDB to common/, which makes them available to gdbserver. This is necessary for the upcoming patches that will share fork_inferior et al between GDB and gdbserver. We move some parts of gdb/terminal.h to gdb/common/common-terminal.h, especifically the code that checks terminal features and that are used to set job_control accordingly. After sharing parts of gdb/terminal.h, we also to share the two functions on gdb/inflow.c that are going to be needed by the fork_inferior rework. They are 'gdb_setpgid' and the new 'have_job_control'. I've also taken the opportunity to give a more meaningful name to "inflow.c" on common/. Now it is called "job-control.c" (thanks Pedro for the suggestion). gdb/ChangeLog: 2017-06-07 Sergio Durigan Junior <sergiodj@redhat.com> * Makefile.in (SFILES): Add "common/job-control.c". (HFILES_NO_SRCDIR): Add "common/job-control.h". (COMMON_OBS): Add "job-control.o". * common/job-control.c: New file, with contents from "gdb/inflow.c". * common/job-control.h: New file, with contents from "terminal.h". * fork-child.c: Include "job-control.h". * inflow.c: Include "job-control.h". (gdb_setpgid): Move to "common/common-inflow.c". (_initialize_inflow): Move setting of "job_control" to "handle_job_control". * terminal.h (job_control): Moved to "common/common-terminal.h". (gdb_setpgid): Likewise. * top.c: Include "job_control.h". * utils.c: Likewise. (job_control): Moved to "job-control.c". gdb/gdbserver/ChangeLog: 2017-06-07 Sergio Durigan Junior <sergiodj@redhat.com> * Makefile.in (SFILE): Add "common/job-control.c". (OBS): Add "job-control.o".
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* Job control and terminal related functions, for GDB and gdbserver
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when running under Unix.
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Copyright (C) 1986-2017 Free Software Foundation, Inc.
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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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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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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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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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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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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "job-control.h"
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#include "gdb_termios.h"
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/* Nonzero if we have job control. */
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int job_control;
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/* Set the process group ID of the inferior.
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Just using job_control only does part of it because setpgid or
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setpgrp might not exist on a system without job control.
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For a more clean implementation, in libiberty, put a setpgid which merely
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calls setpgrp and a setpgrp which does nothing (any system with job control
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will have one or the other). */
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int
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gdb_setpgid ()
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{
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int retval = 0;
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if (job_control)
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{
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#if defined (HAVE_TERMIOS) || defined (TIOCGPGRP)
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#ifdef HAVE_SETPGID
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/* The call setpgid (0, 0) is supposed to work and mean the same
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thing as this, but on Ultrix 4.2A it fails with EPERM (and
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setpgid (getpid (), getpid ()) succeeds). */
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retval = setpgid (getpid (), getpid ());
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#else
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#ifdef HAVE_SETPGRP
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#ifdef SETPGRP_VOID
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retval = setpgrp ();
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#else
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retval = setpgrp (getpid (), getpid ());
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#endif
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#endif /* HAVE_SETPGRP */
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#endif /* HAVE_SETPGID */
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#endif /* defined (HAVE_TERMIOS) || defined (TIOCGPGRP) */
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}
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return retval;
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}
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/* See common/common-terminal.h. */
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void
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have_job_control ()
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{
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/* OK, figure out whether we have job control. If neither termios nor
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sgtty (i.e. termio or go32), leave job_control 0. */
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#if defined (HAVE_TERMIOS)
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/* Do all systems with termios have the POSIX way of identifying job
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control? I hope so. */
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#ifdef _POSIX_JOB_CONTROL
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job_control = 1;
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#else
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#ifdef _SC_JOB_CONTROL
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job_control = sysconf (_SC_JOB_CONTROL);
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#else
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job_control = 0; /* Have to assume the worst. */
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#endif /* _SC_JOB_CONTROL */
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#endif /* _POSIX_JOB_CONTROL */
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#endif /* HAVE_TERMIOS */
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#ifdef HAVE_SGTTY
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#ifdef TIOCGPGRP
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job_control = 1;
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#else
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job_control = 0;
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#endif /* TIOCGPGRP */
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#endif /* sgtty */
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}
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