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