projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 15652511 SDJ |
1 | /* Job control and terminal related functions, for GDB and gdbserver |
| 2 | when running under Unix. | |
| 3 | ||
| 4 | Copyright (C) 1986-2017 Free Software Foundation, Inc. | |
| 5 | ||
| 6 | This file is part of GDB. | |
| 7 | ||
| 8 | This program is free software; you can redistribute it and/or modify | |
| 9 | it under the terms of the GNU General Public License as published by | |
| 10 | the Free Software Foundation; either version 3 of the License, or | |
| 11 | (at your option) any later version. | |
| 12 | ||
| 13 | This program is distributed in the hope that it will be useful, | |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 | GNU General Public License for more details. | |
| 17 | ||
| 18 | You should have received a copy of the GNU General Public License | |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 20 | ||
| 21 | #include "common-defs.h" | |
| 22 | #include "job-control.h" | |
| 23 | #include "gdb_termios.h" | |
| 24 | ||
| 25 | /* Nonzero if we have job control. */ | |
| 26 | int job_control; | |
| 27 | ||
| 28 | /* Set the process group ID of the inferior. | |
| 29 | ||
| 30 | Just using job_control only does part of it because setpgid or | |
| 31 | setpgrp might not exist on a system without job control. | |
| 32 | ||
| 33 | For a more clean implementation, in libiberty, put a setpgid which merely | |
| 34 | calls setpgrp and a setpgrp which does nothing (any system with job control | |
| 35 | will have one or the other). */ | |
| 36 | ||
| 37 | int | |
| 38 | gdb_setpgid () | |
| 39 | { | |
| 40 | int retval = 0; | |
| 41 | ||
| 42 | if (job_control) | |
| 43 | { | |
| 44 | #if defined (HAVE_TERMIOS) || defined (TIOCGPGRP) | |
| 45 | #ifdef HAVE_SETPGID | |
| 46 | /* The call setpgid (0, 0) is supposed to work and mean the same | |
| 47 | thing as this, but on Ultrix 4.2A it fails with EPERM (and | |
| 48 | setpgid (getpid (), getpid ()) succeeds). */ | |
| 49 | retval = setpgid (getpid (), getpid ()); | |
| 50 | #else | |
| 51 | #ifdef HAVE_SETPGRP | |
| 52 | #ifdef SETPGRP_VOID | |
| 53 | retval = setpgrp (); | |
| 54 | #else | |
| 55 | retval = setpgrp (getpid (), getpid ()); | |
| 56 | #endif | |
| 57 | #endif /* HAVE_SETPGRP */ | |
| 58 | #endif /* HAVE_SETPGID */ | |
| 59 | #endif /* defined (HAVE_TERMIOS) || defined (TIOCGPGRP) */ | |
| 60 | } | |
| 61 | ||
| 62 | return retval; | |
| 63 | } | |
| 64 | ||
| 65 | /* See common/common-terminal.h. */ | |
| 66 | ||
| 67 | void | |
| 68 | have_job_control () | |
| 69 | { | |
| 70 | /* OK, figure out whether we have job control. If neither termios nor | |
| 71 | sgtty (i.e. termio or go32), leave job_control 0. */ | |
| 72 | #if defined (HAVE_TERMIOS) | |
| 73 | /* Do all systems with termios have the POSIX way of identifying job | |
| 74 | control? I hope so. */ | |
| 75 | #ifdef _POSIX_JOB_CONTROL | |
| 76 | job_control = 1; | |
| 77 | #else | |
| 78 | #ifdef _SC_JOB_CONTROL | |
| 79 | job_control = sysconf (_SC_JOB_CONTROL); | |
| 80 | #else | |
| 81 | job_control = 0; /* Have to assume the worst. */ | |
| 82 | #endif /* _SC_JOB_CONTROL */ | |
| 83 | #endif /* _POSIX_JOB_CONTROL */ | |
| 84 | #endif /* HAVE_TERMIOS */ | |
| 85 | ||
| 86 | #ifdef HAVE_SGTTY | |
| 87 | #ifdef TIOCGPGRP | |
| 88 | job_control = 1; | |
| 89 | #else | |
| 90 | job_control = 0; | |
| 91 | #endif /* TIOCGPGRP */ | |
| 92 | #endif /* sgtty */ | |
| 93 | } |