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Annotation of 43BSDReno/contrib/emacs-18.55/src/s-rtu.h, revision 1.1

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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