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1.1 root 1: /* Definitions file for GNU Emacs running on RTU 3.0, ucb universe.
2: Copyright (C) 1986 Free Software Foundation, Inc.
3:
4: This file is part of GNU Emacs.
5:
6: GNU Emacs is free software; you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation; either version 1, or (at your option)
9: any later version.
10:
11: GNU Emacs is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU Emacs; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20:
21: /*
22: * Define symbols to identify the version of Unix this is.
23: * Define all the symbols that apply correctly.
24: */
25:
26: #define BSD4_2
27: #define BSD
28: #define RTU
29:
30: /* SYSTEM_TYPE should indicate the kind of system you are using.
31: It sets the Lisp variable system-type. */
32:
33: #define SYSTEM_TYPE "rtu"
34:
35: /* NOMULTIPLEJOBS should be defined if your system's shell
36: does not have "job control" (the ability to stop a program,
37: run some other program, then continue the first one). */
38:
39: #define NOMULTIPLEJOBS
40:
41: /* Emacs can read input using SIGIO and buffering characters itself,
42: or using CBREAK mode and making C-g cause SIGINT.
43: The choice is controlled by the variable interrupt_input.
44: Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
45:
46: SIGIO can be used only on systems that implement it (4.2 and 4.3).
47: CBREAK mode has two disadvatages
48: 1) At least in 4.2, it is impossible to handle the Meta key properly.
49: I hear that in system V this problem does not exist.
50: 2) Control-G causes output to be discarded.
51: I do not know whether this can be fixed in system V.
52:
53: Another method of doing input is planned but not implemented.
54: It would have Emacs fork off a separate process
55: to read the input and send it to the true Emacs process
56: through a pipe.
57: */
58:
59: #undef INTERRUPT_INPUT
60:
61: /* Letter to use in finding device name of first pty,
62: if system supports pty's. 'a' means it is /dev/ptya0 */
63:
64: #define FIRST_PTY_LETTER 'z' /* i.e. no PTY_LETTERs */
65:
66: /*
67: * Define HAVE_TIMEVAL if the system supports the BSD style clock values.
68: * Look in <sys/time.h> for a timeval structure.
69: */
70:
71: #define HAVE_TIMEVAL
72:
73: /*
74: * Define HAVE_SELECT if the system supports the `select' system call.
75: */
76:
77: #define HAVE_SELECT
78:
79: /*
80: * Define HAVE_PTYS if the system supports pty devices.
81: */
82:
83: #define HAVE_PTYS
84:
85: /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets. */
86:
87: #define HAVE_SOCKETS
88:
89: /*
90: * Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
91: * The 4.2 opendir, etc., library functions.
92: */
93:
94: #define NONSYSTEM_DIR_LIBRARY
95:
96: /* Define this symbol if your system has the functions bcopy, etc. */
97: /* The system library bcopy() is broken in RTU. For one thing, it expects
98: the length to be less than 64k. */
99: #undef BSTRING
100:
101: /* subprocesses should be defined if you want to
102: have code for asynchronous subprocesses
103: (as used in M-x compile and M-x shell).
104: This is generally OS dependent, and not supported
105: under most USG systems. */
106:
107: #define subprocesses
108:
109: /* If your system uses COFF (Common Object File Format) then define the
110: preprocessor symbol "COFF". */
111:
112: #undef COFF
113:
114: /* define MAIL_USE_FLOCK if the mailer uses flock
115: to interlock access to /usr/spool/mail/$USER.
116: The alternative is that a lock file named
117: /usr/spool/mail/$USER.lock. */
118:
119: #undef MAIL_USE_FLOCK
120:
121: /* Define CLASH_DETECTION if you want lock files to be written
122: so that Emacs can tell instantly when you try to modify
123: a file that someone else has modified in his Emacs. */
124:
125: #undef CLASH_DETECTION
126:
127: /* We use the Berkeley (and usg5.2.2) interface to nlist. */
128:
129: #define NLIST_STRUCT
130:
131: /* The symbol in the kernel where the load average is found
132: is named _avenrun. */
133:
134: #define LDAV_SYMBOL "_avenrun"
135:
136: /* Special hacks needed to make Emacs run on this system. */
137:
138: /* On RTU systems (like USG) the system calls are interruptable by signals
139: that the user program has elected to catch. Thus the system call
140: must be retried in these cases. To handle this without massive
141: changes in the source code, we remap the standard system call names
142: to names for our own functions in sysdep.c that do the system call
143: with retries. */
144:
145: #define read sys_read
146: #define open sys_open
147: #define write sys_write
148:
149: #define INTERRUPTABLE_OPEN
150: #define INTERRUPTABLE_IO
151:
152: /* The "fsync" call on RTU versions 3.0 and 3.1 is badly broken!
153: This hack below isn't the best solution, but without it this
154: program will cause the whole system to hang! !@#$#%$ Masscomp! */
155:
156: #define fsync(x) 0 /* "Comment out" fsync calls */
157:
158: /* RTU has IPC instead of Unix-domain sockets. */
159:
160: #define HAVE_SYSVIPC
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