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20c428fd | 1 | /* Definitions file for GNU Emacs running on AT&T's System V Release 4 |
4b158629 GM |
2 | Copyright (C) 1987, 1990, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
3 | 2006, 2007, 2008 Free Software Foundation, Inc. | |
20c428fd JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
4b158629 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
bd307392 | 8 | it under the terms of the GNU General Public License as published by |
4b158629 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
bd307392 | 11 | |
20c428fd | 12 | GNU Emacs is distributed in the hope that it will be useful, |
bd307392 JB |
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 | |
4b158629 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
20c428fd JB |
19 | |
20 | /* This file written by James Van Artsdalen of Dell Computer Corporation. | |
5447018c JB |
21 | * james@bigtex.cactus.org. Subsequently improved for Dell 2.2 by Eric |
22 | * S. Raymond <esr@snark.thyrsus.com>. | |
20c428fd JB |
23 | */ |
24 | ||
25 | /* Use the SysVr3 file for at least base configuration. */ | |
26 | ||
f2a77c3a | 27 | #define USG /* System III, System V, etc */ |
20c428fd | 28 | |
f2a77c3a | 29 | #define USG5 |
20c428fd JB |
30 | #define USG5_4 |
31 | ||
f2a77c3a DN |
32 | /* SYSTEM_TYPE should indicate the kind of system you are using. |
33 | It sets the Lisp variable system-type. */ | |
20c428fd | 34 | |
f2a77c3a | 35 | #define SYSTEM_TYPE "usg-unix-v" |
20c428fd | 36 | |
f2a77c3a DN |
37 | /* |
38 | * Define HAVE_TERMIO if the system provides sysV-style ioctls | |
39 | * for terminal control. | |
40 | */ | |
41 | ||
42 | #define HAVE_TERMIO | |
43 | ||
44 | /* | |
45 | * Define HAVE_PTYS if the system supports pty devices. | |
46 | */ | |
47 | ||
f2a77c3a DN |
48 | /* |
49 | * Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir | |
50 | * library functions. Almost, but not quite the same as | |
51 | * the 4.2 functions | |
52 | */ | |
53 | #define SYSV_SYSTEM_DIR | |
54 | ||
f2a77c3a DN |
55 | /* The file containing the kernel's symbol table is called /unix. */ |
56 | ||
57 | #define KERNEL_FILE "/unix" | |
58 | ||
59 | /* The symbol in the kernel where the load average is found | |
60 | is named avenrun. */ | |
61 | ||
62 | #define LDAV_SYMBOL "avenrun" | |
63 | ||
f2a77c3a DN |
64 | /* Special hacks needed to make Emacs run on this system. */ |
65 | ||
66 | /* | |
67 | * Make the sigsetmask function go away. Don't know what the | |
68 | * ramifications of this are, but doesn't seem possible to | |
69 | * emulate it properly anyway at this point. | |
70 | */ | |
71 | ||
72 | #define sigsetmask(mask) /* Null expansion */ | |
73 | ||
74 | /* setjmp and longjmp can safely replace _setjmp and _longjmp, | |
75 | but they will run slower. */ | |
76 | ||
77 | #define _setjmp setjmp | |
78 | #define _longjmp longjmp | |
79 | ||
80 | /* On USG systems these have different names */ | |
81 | #ifndef HAVE_INDEX | |
82 | #define index strchr | |
83 | #endif /* ! defined (HAVE_INDEX) */ | |
84 | #ifndef HAVE_RINDEX | |
85 | #define rindex strrchr | |
86 | #endif /* ! defined (HAVE_RINDEX) */ | |
87 | ||
f2a77c3a DN |
88 | /* Compiler bug bites on many systems when default ADDR_CORRECT is used. */ |
89 | ||
90 | #define ADDR_CORRECT(x) (x) | |
91 | ||
92 | /* Use terminfo instead of termcap. */ | |
93 | ||
94 | #define TERMINFO | |
95 | ||
96 | ||
97 | /* The docs for system V/386 suggest v.3 has sigpause, | |
98 | so let's give it a try. */ | |
99 | #define HAVE_SYSV_SIGPAUSE | |
100 | ||
101 | ||
102 | /* If we're using the System V X port, BSD bstring functions will be handy */ | |
103 | ||
104 | #ifdef HAVE_X_WINDOWS | |
105 | #define BSTRING | |
106 | #endif /* HAVE_X_WINDOWS */ | |
107 | ||
f2a77c3a DN |
108 | /* On USG systems signal handlers return void */ |
109 | ||
110 | #define SIGTYPE void | |
5cb70bb5 | 111 | |
d6bf1bdb DN |
112 | #define ORDINARY_LINK |
113 | ||
114 | #define LIB_STANDARD | |
20c428fd | 115 | |
5447018c JB |
116 | /* there are no -lg libraries on this system, and no libPW */ |
117 | ||
118 | #define LIBS_DEBUG | |
20c428fd JB |
119 | |
120 | /* Undump with ELF */ | |
121 | ||
122 | #undef COFF | |
123 | ||
124 | #define UNEXEC unexelf.o | |
125 | ||
126 | /* Get FIONREAD from <sys/filio.h>. Get <sys/ttold.h> to get struct | |
127 | * tchars. But get <termio.h> first to make sure ttold.h doesn't | |
128 | * interfere. And don't try to use SIGIO yet. | |
129 | */ | |
130 | ||
f0ce95e7 RS |
131 | #ifndef NOT_C_CODE |
132 | #include <sys/wait.h> | |
133 | #endif | |
134 | ||
20c428fd JB |
135 | #ifdef emacs |
136 | #include <sys/filio.h> | |
137 | #include <termio.h> | |
138 | #include <sys/ttold.h> | |
139 | #include <signal.h> | |
bd307392 JB |
140 | #include <sys/stream.h> |
141 | #include <sys/stropts.h> | |
142 | #include <sys/termios.h> | |
bb7b4368 | 143 | #define BROKEN_SIGIO |
20c428fd JB |
144 | #endif |
145 | ||
5447018c JB |
146 | /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments; |
147 | * instead, there's a system variable _sys_nsig. Unfortunately, we need the | |
148 | * constant to dimension an array. So wire in the appropriate value here. | |
149 | */ | |
bb7b4368 | 150 | #define NSIG_MINIMUM 32 |
5447018c | 151 | |
20c428fd JB |
152 | /* We can support this */ |
153 | ||
154 | #define CLASH_DETECTION | |
155 | ||
156 | #define HAVE_PTYS | |
5447018c | 157 | #define HAVE_TERMIOS |
20c428fd JB |
158 | |
159 | /* It is possible to receive SIGCHLD when there are no children | |
160 | waiting, because a previous waitsys(2) cleaned up the carcass of child | |
161 | without clearing the SIGCHLD pending info. So, use a non-blocking | |
162 | wait3 instead, which maps to waitpid(2) in SysVr4. */ | |
163 | ||
20c428fd | 164 | #define wait3(status, options, rusage) \ |
5bf62b08 | 165 | waitpid ((pid_t) -1, (status), (options)) |
20c428fd JB |
166 | #define WRETCODE(w) (w >> 8) |
167 | ||
168 | /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY | |
169 | subprocesses the usual way. But TIOCSIGNAL does work for PTYs, and | |
170 | this is all we need. */ | |
171 | ||
172 | #define TIOCSIGSEND TIOCSIGNAL | |
173 | ||
174 | /* This change means that we don't loop through allocate_pty too many | |
175 | times in the (rare) event of a failure. */ | |
176 | ||
20c428fd JB |
177 | #define FIRST_PTY_LETTER 'z' |
178 | ||
179 | /* This sets the name of the master side of the PTY. */ | |
180 | ||
181 | #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx"); | |
182 | ||
183 | /* This sets the name of the slave side of the PTY. On SysVr4, | |
184 | grantpt(3) forks a subprocess, so keep sigchld_handler() from | |
185 | intercepting that death. If any child but grantpt's should die | |
186 | within, it should be caught after sigrelse(2). */ | |
187 | ||
5bf62b08 RS |
188 | #define PTY_TTY_NAME_SPRINTF \ |
189 | { \ | |
190 | char *ptsname (), *ptyname; \ | |
191 | \ | |
192 | sighold (SIGCLD); \ | |
193 | if (grantpt (fd) == -1) \ | |
bb7b4368 | 194 | { emacs_close (fd); return -1; } \ |
5bf62b08 RS |
195 | sigrelse (SIGCLD); \ |
196 | if (unlockpt (fd) == -1) \ | |
bb7b4368 | 197 | { emacs_close (fd); return -1; } \ |
5bf62b08 | 198 | if (!(ptyname = ptsname (fd))) \ |
bb7b4368 | 199 | { emacs_close (fd); return -1; } \ |
5bf62b08 RS |
200 | strncpy (pty_name, ptyname, sizeof (pty_name)); \ |
201 | pty_name[sizeof (pty_name) - 1] = 0; \ | |
20c428fd JB |
202 | } |
203 | ||
204 | /* Push various streams modules onto a PTY channel. */ | |
205 | ||
206 | #define SETUP_SLAVE_PTY \ | |
207 | if (ioctl (xforkin, I_PUSH, "ptem") == -1) \ | |
208 | fatal ("ioctl I_PUSH ptem", errno); \ | |
209 | if (ioctl (xforkin, I_PUSH, "ldterm") == -1) \ | |
210 | fatal ("ioctl I_PUSH ldterm", errno); \ | |
211 | if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \ | |
212 | fatal ("ioctl I_PUSH ttcompat", errno); | |
213 | ||
bd307392 JB |
214 | /* This definition was suggested for next release. |
215 | So give it a try. */ | |
216 | #define HAVE_SOCKETS | |
5cb70bb5 | 217 | |
ab5796a9 MB |
218 | /* arch-tag: 1a0ed909-5faa-434b-b7c3-9d86c63d53a6 |
219 | (do not change this comment) */ |