| 1 | /* systty.h - System-dependent definitions for terminals. |
| 2 | Copyright (C) 1993, 1994, 2001, 2002, 2003, 2004, |
| 3 | 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | /* Include the proper files. */ |
| 21 | #ifndef DOS_NT |
| 22 | #ifndef NO_TERMIO |
| 23 | #include <termio.h> |
| 24 | #endif /* not NO_TERMIO */ |
| 25 | #include <termios.h> |
| 26 | #include <fcntl.h> |
| 27 | #endif /* not DOS_NT */ |
| 28 | |
| 29 | #include <sys/ioctl.h> |
| 30 | |
| 31 | #ifdef HPUX |
| 32 | #include <sys/bsdtty.h> |
| 33 | #include <sys/ptyio.h> |
| 34 | #endif |
| 35 | |
| 36 | #ifdef AIX |
| 37 | #include <sys/pty.h> |
| 38 | #endif /* AIX */ |
| 39 | |
| 40 | #ifdef HAVE_UNISTD_H |
| 41 | #include <unistd.h> |
| 42 | #endif |
| 43 | |
| 44 | \f |
| 45 | /* Special cases - inhibiting the use of certain features. */ |
| 46 | |
| 47 | /* Allow m- file to inhibit use of FIONREAD. */ |
| 48 | #ifdef BROKEN_FIONREAD |
| 49 | #undef FIONREAD |
| 50 | #undef ASYNC |
| 51 | #endif |
| 52 | |
| 53 | /* Interrupt input is not used if there is no FIONREAD. */ |
| 54 | #ifndef FIONREAD |
| 55 | #undef SIGIO |
| 56 | #endif |
| 57 | |
| 58 | \f |
| 59 | /* Try to establish the correct character to disable terminal functions |
| 60 | in a system-independent manner. Note that USG (at least) define |
| 61 | _POSIX_VDISABLE as 0! */ |
| 62 | |
| 63 | #ifdef _POSIX_VDISABLE |
| 64 | #define CDISABLE _POSIX_VDISABLE |
| 65 | #else /* not _POSIX_VDISABLE */ |
| 66 | #ifdef CDEL |
| 67 | #undef CDISABLE |
| 68 | #define CDISABLE CDEL |
| 69 | #else /* not CDEL */ |
| 70 | #define CDISABLE 255 |
| 71 | #endif /* not CDEL */ |
| 72 | #endif /* not _POSIX_VDISABLE */ |
| 73 | \f |
| 74 | /* Get the number of characters queued for output. */ |
| 75 | |
| 76 | /* EMACS_OUTQSIZE(FD, int *SIZE) stores the number of characters |
| 77 | queued for output to the terminal FD in *SIZE, if FD is a tty. |
| 78 | Returns -1 if there was an error (i.e. FD is not a tty), 0 |
| 79 | otherwise. */ |
| 80 | #ifdef TIOCOUTQ |
| 81 | #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TIOCOUTQ, (size))) |
| 82 | #endif |
| 83 | |
| 84 | \f |
| 85 | /* Manipulate a terminal's current process group. */ |
| 86 | |
| 87 | /* EMACS_GETPGRP (arg) returns the process group of the process. */ |
| 88 | |
| 89 | #if defined (GETPGRP_VOID) |
| 90 | # define EMACS_GETPGRP(x) getpgrp() |
| 91 | #else /* !GETPGRP_VOID */ |
| 92 | # define EMACS_GETPGRP(x) getpgrp(x) |
| 93 | #endif /* !GETPGRP_VOID */ |
| 94 | \f |
| 95 | /* Manipulate a TTY's input/output processing parameters. */ |
| 96 | |
| 97 | /* struct emacs_tty is a structure used to hold the current tty |
| 98 | parameters. If the terminal has several structures describing its |
| 99 | state, for example a struct tchars, a struct sgttyb, a struct |
| 100 | tchars, a struct ltchars, and a struct pagechars, struct |
| 101 | emacs_tty should contain an element for each parameter struct |
| 102 | that Emacs may change. */ |
| 103 | |
| 104 | |
| 105 | /* For each tty parameter structure that Emacs might want to save and restore, |
| 106 | - include an element for it in this structure, and |
| 107 | - extend the emacs_{get,set}_tty functions in sysdep.c to deal with the |
| 108 | new members. */ |
| 109 | |
| 110 | struct emacs_tty { |
| 111 | |
| 112 | /* There is always one of the following elements, so there is no need |
| 113 | for dummy get and set definitions. */ |
| 114 | #ifndef DOS_NT |
| 115 | struct termios main; |
| 116 | #else /* DOS_NT */ |
| 117 | int main; |
| 118 | #endif /* DOS_NT */ |
| 119 | }; |
| 120 | \f |
| 121 | extern int emacs_get_tty (int, struct emacs_tty *); |
| 122 | extern int emacs_set_tty (int, struct emacs_tty *, int); |
| 123 | |