/usr/share/slib/elk.init is in slib 3b1-3.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 | ;;;"elk.init" Initialisation file for SLIB for ELK 3.0 -*- Scheme -*-
;;; Author: Aubrey Jaffer
;;;
;;; This code is in the public domain.
; No guarantees are given about the correctness of any of the
; choices made below. Only enough work was done to get the require
; mechanism to work correctly.
;
; Stephen J. Bevan <bevan@cs.man.ac.uk> 19920912 modified by Mike
; Sperber to work correctly with statically-linked Elk and slib1d. Be
; sure to change the library vicinities according to your local
; configuration. If you're running MS-DOS (which is possible since
; 2.1), you probably have to change this file to make everything work
; correctly.
;;; (software-type) should be set to the generic operating system type.
;;; UNIX, VMS, MACOS, AMIGA and MS-DOS are supported.
(define (software-type) 'unix)
;;; (scheme-implementation-type) should return the name of the scheme
;;; implementation loading this file.
(define (scheme-implementation-type) 'Elk)
;;; (scheme-implementation-home-page) should return a (string) URI
;;; (Uniform Resource Identifier) for this scheme implementation's home
;;; page; or false if there isn't one.
(define (scheme-implementation-home-page)
"http://www.informatik.uni-bremen.de/~net/elk/")
;;; (scheme-implementation-version) should return a string describing
;;; the version the scheme implementation loading this file.
(define (scheme-implementation-version) "3.0")
;;; (implementation-vicinity) should be defined to be the pathname of
;;; the directory where any auxillary files to your Scheme
;;; implementation reside.
(define implementation-vicinity
(let ((impl-path
(or (getenv "ELK_IMPLEMENTATION_PATH")
(case (software-type)
((unix) "/usr/share/elk/")
((vms) "scheme$src:")
((ms-dos) "C:\\scheme\\")
(else "")))))
(lambda () impl-path)))
;;; (library-vicinity) should be defined to be the pathname of the
;;; directory where files of Scheme library functions reside.
(require 'unix)
(define getenv unix-getenv)
(define system unix-system)
(define library-vicinity
(let ((library-path
(or (getenv "SCHEME_LIBRARY_PATH")
;; Uses this path if SCHEME_LIBRARY_PATH is not defined.
(case (software-type)
((unix) "/usr/local/lib/slib/")
((vms) "lib$scheme:")
((ms-dos) "C:\\SLIB\\")
(else "")))))
(lambda () library-path)))
;;; (home-vicinity) should return the vicinity of the user's HOME
;;; directory, the directory which typically contains files which
;;; customize a computer environment for a user.
(define (home-vicinity)
(let ((home (getenv "HOME")))
(and home
(case (software-type)
((unix coherent ms-dos) ;V7 unix has a / on HOME
(if (eqv? #\/ (string-ref home (+ -1 (string-length home))))
home
(string-append home "/")))
(else home)))))
;@
(define in-vicinity string-append)
;@
(define (user-vicinity)
(case (software-type)
((vms) "[.]")
(else "")))
(define *load-pathname* #f)
;@
(define vicinity:suffix?
(let ((suffi
(case (software-type)
((amiga) '(#\: #\/))
((macos thinkc) '(#\:))
((ms-dos windows atarist os/2) '(#\\ #\/))
((nosve) '(#\: #\.))
((unix coherent plan9) '(#\/))
((vms) '(#\: #\]))
(else
(slib:warn "require.scm" 'unknown 'software-type (software-type))
"/"))))
(lambda (chr) (and (memv chr suffi) #t))))
;@
(define (pathname->vicinity pathname)
(let loop ((i (- (string-length pathname) 1)))
(cond ((negative? i) "")
((vicinity:suffix? (string-ref pathname i))
(substring pathname 0 (+ i 1)))
(else (loop (- i 1))))))
(define (program-vicinity)
(if *load-pathname*
(pathname->vicinity *load-pathname*)
(slib:error 'program-vicinity " called; use slib:load to load")))
;@
(define sub-vicinity
(case (software-type)
((vms) (lambda (vic name)
(let ((l (string-length vic)))
(if (or (zero? (string-length vic))
(not (char=? #\] (string-ref vic (- l 1)))))
(string-append vic "[" name "]")
(string-append (substring vic 0 (- l 1))
"." name "]")))))
(else (let ((*vicinity-suffix*
(case (software-type)
((nosve) ".")
((macos thinkc) ":")
((ms-dos windows atarist os/2) "\\")
((unix coherent plan9 amiga) "/"))))
(lambda (vic name)
(string-append vic name *vicinity-suffix*))))))
;@
(define (make-vicinity <pathname>) <pathname>)
;@
(define with-load-pathname
(let ((exchange
(lambda (new)
(let ((old *load-pathname*))
(set! *load-pathname* new)
old))))
(lambda (path thunk)
(let* ((old (exchange path))
(val (thunk)))
(exchange old)
val))))
;;@ SLIB:FEATURES is a list of symbols naming the (SLIB) features
;;; initially supported by this implementation.
(define slib:features
'(
source ;can load scheme source files
;(SLIB:LOAD-SOURCE "filename")
compiled ;can load compiled files
;(SLIB:LOAD-COMPILED "filename")
vicinity
srfi-59
srfi-96
;; Scheme report features
;; R5RS-compliant implementations should provide all 9 features.
;;; r5rs ;conforms to
;;; eval ;R5RS two-argument eval
;;; values ;R5RS multiple values
;;; dynamic-wind ;R5RS dynamic-wind
;;; macro ;R5RS high level macros
delay ;has DELAY and FORCE
multiarg-apply ;APPLY can take more than 2 args.
;;; char-ready?
rev4-optional-procedures ;LIST-TAIL, STRING-COPY,
;STRING-FILL!, and VECTOR-FILL!
;; These four features are optional in both R4RS and R5RS
multiarg/and- ;/ and - can take more than 2 args.
;;; rationalize
transcript ;TRANSCRIPT-ON and TRANSCRIPT-OFF
;;; with-file ;has WITH-INPUT-FROM-FILE and
;WITH-OUTPUT-TO-FILE
r4rs ;conforms to
ieee-p1178 ;conforms to
;;; r3rs ;conforms to
rev2-procedures ;SUBSTRING-MOVE-LEFT!,
;SUBSTRING-MOVE-RIGHT!,
;SUBSTRING-FILL!,
;STRING-NULL?, APPEND!, 1+,
;-1+, <?, <=?, =?, >?, >=?
;;; object-hash ;has OBJECT-HASH
full-continuation ;can return multiple times
;;; ieee-floating-point ;conforms to IEEE Standard 754-1985
;IEEE Standard for Binary
;Floating-Point Arithmetic.
;; Other common features
;;; srfi-0 ;srfi-0, COND-EXPAND finds all srfi-*
sicp ;runs code from Structure and
;Interpretation of Computer
;Programs by Abelson and Sussman.
defmacro ;has Common Lisp DEFMACRO
;;; record ;has user defined data structures
string-port ;has CALL-WITH-INPUT-STRING and
;CALL-WITH-OUTPUT-STRING
sort
;;; pretty-print
;;; object->string
format ;Common-lisp output formatting
;;; trace ;has macros: TRACE and UNTRACE
;;; compiler ;has (COMPILER)
;;; ed ;(ED) is editor
system ;posix (system <string>)
getenv ;posix (getenv <string>)
program-arguments ;returns list of strings (argv)
;;; current-time ;returns time in seconds since 1/1/1970
;; Implementation Specific features
))
;------------
(define (program-arguments)
(cons (symbol->string (scheme-implementation-type))
(command-line-args)))
; EXACT? appears to always return #f which isn't very useful.
; Approximating it with INTEGER? at least means that some
; of the code in the library will work correctly
(define exact? integer?) ; WARNING: redefining EXACT?
(define (inexact? arg)
(not (exact? arg)))
;;; (TMPNAM) makes a temporary file name.
(define tmpnam
(let ((cntr 100))
(lambda () (set! cntr (+ 1 cntr))
(let ((tmp (string-append "slib_" (number->string cntr))))
(if (file-exists? tmp) (tmpnam) tmp)))))
; Pull in GENTENV and SYSTEM
;;; (FILE-EXISTS? <string>) already here.
;;; (DELETE-FILE <string>)
(define (delete-file f) (system (string-append "rm '" f "'")))
;------------
;;@ (FILE-POSITION <port> . k)
(define (file-position . args) #f)
;;; (OUTPUT-PORT-WIDTH <port>)
(define (output-port-width . arg) 79)
;;; (OUTPUT-PORT-HEIGHT <port>)
(define (output-port-height . arg) 24)
;;; (CURRENT-ERROR-PORT)
;;; is already defined in Elk 2.1
;;; FORCE-OUTPUT flushes any pending output on optional arg output port
;;; use this definition if your system doesn't have such a procedure.
(define force-output flush-output-port)
;;; CALL-WITH-INPUT-STRING and CALL-WITH-OUTPUT-STRING are the string
;;; port versions of CALL-WITH-*PUT-FILE.
(define (call-with-output-string f)
(let ((outsp (open-output-string)))
(f outsp)
(let ((s (get-output-string outsp)))
(close-output-port outsp)
s)))
(define (call-with-input-string s f)
(let* ((insp (open-input-string s))
(res (f insp)))
(close-input-port insp)
res))
(define (make-exchanger obj)
(lambda (rep) (let ((old obj)) (set! obj rep) old)))
(define (open-file filename modes)
(case modes
((r rb) (open-input-file filename))
((w wb) (open-output-file filename))
(else (slib:error 'open-file 'mode? modes))))
(define (port? obj) (or (input-port? port) (output-port? port)))
(define (call-with-open-ports . ports)
(define proc (car ports))
(cond ((procedure? proc) (set! ports (cdr ports)))
(else (set! ports (reverse ports))
(set! proc (car ports))
(set! ports (reverse (cdr ports)))))
(let ((ans (apply proc ports)))
(for-each close-port ports)
ans))
(define (close-port port)
(cond ((input-port? port)
(close-input-port port)
(if (output-port? port) (close-output-port port)))
((output-port? port) (close-output-port port))
(else (slib:error 'close-port 'port? port))))
(define (browse-url url)
(define (try cmd end) (zero? (system (string-append cmd url end))))
(or (try "netscape-remote -remote 'openURL(" ")'")
(try "netscape -remote 'openURL(" ")'")
(try "netscape '" "'&")
(try "netscape '" "'")))
;;; CHAR-CODE-LIMIT is one greater than the largest integer which can
;;; be returned by CHAR->INTEGER.
(define char-code-limit 256)
;;; MOST-POSITIVE-FIXNUM is used in modular.scm
(define most-positive-fixnum 8388608) ; 23 bit integers ?
;;; Return argument
(define (identity x) x)
;;; SLIB:EVAL is single argument eval using the top-level (user) environment.
(define slib:eval eval)
(define *macros* '())
(define (defmacro? m) (and (assq m *macros*) #t))
(define-macro (defmacro key pattern . body)
`(begin
(define-macro ,(cons key pattern) ,@body)
(set! *macros* (cons (cons ',key (lambda ,pattern ,@body)) *macros*))))
(define (macroexpand-1 e)
(if (pair? e) (let ((a (car e)))
(cond ((symbol? a) (set! a (assq a *macros*))
(if a (apply (cdr a) (cdr e)) e))
(else e)))
e))
(define (macroexpand e)
(if (pair? e) (let ((a (car e)))
(cond ((symbol? a)
(set! a (assq a *macros*))
(if a (macroexpand (apply (cdr a) (cdr e))) e))
(else e)))
e))
(define gentemp
(let ((*gensym-counter* -1))
(lambda ()
(set! *gensym-counter* (+ *gensym-counter* 1))
(string->symbol
(string-append "slib:G" (number->string *gensym-counter*))))))
(define defmacro:eval slib:eval)
(define defmacro:load load)
(define slib:warn
(lambda args
(let ((cep (current-error-port)))
(if (provided? 'trace) (print-call-stack cep))
(display "Warn: " cep)
(for-each (lambda (x) (display #\space cep) (write x cep)) args))))
;;; define an error procedure for the library
(define slib:error
(let ((error error))
(lambda args
(if (provided? 'trace) (print-call-stack (current-error-port)))
(let ((port (open-output-string))
(err (if (and (pair? args) (symbol? (car args)))
(car args) 'slib))
(args (if (and (pair? args) (symbol? (car args)))
(cdr args) args)))
(for-each (lambda (x) (display x port) (display " " port)) args)
(let ((str (get-output-string port)))
(close-output-port port)
(error err str))))))
;;; define these as appropriate for your system.
(define slib:tab #\tab)
(define slib:form-feed #\formfeed)
;;; Define these if your implementation's syntax can support it and if
;;; they are not already defined.
;(define (1+ n) (+ n 1))
;(define (-1+ n) (+ n -1))
;(define 1- -1+)
;;; Define SLIB:EXIT to be the implementation procedure to exit or
;;; return if exiting not supported.
(define slib:exit
(lambda args
(exit (cond ((null? args) 0)
((eqv? #t (car args)) 0)
((and (number? (car args)) (integer? (car args))) (car args))
(else 1)))))
;;; Here for backward compatability
(define scheme-file-suffix
(let ((suffix (case (software-type)
((nosve) "_scm")
(else ".scm"))))
(lambda () suffix)))
;;; (SLIB:LOAD-SOURCE "foo") should load "foo.scm" or with whatever
;;; suffix all the module files in SLIB have. See feature 'SOURCE.
; Modify the already modified _load_ so that it copes with
; environments correctly. The change involves using
; _(global-environment)_ if none is explicitly specified.
; If this is not done, definitions in files loaded by other files will
; not be loaded in the correct environment.
(define slib:load-source
(let ((primitive-load load))
(lambda (<pathname> . rest)
(let ((env (if (null? rest) (list (global-environment)) rest)))
(apply primitive-load (string-append <pathname> (scheme-file-suffix))
env)))))
;;; (SLIB:LOAD-COMPILED "foo") should load the file that was produced
;;; by compiling "foo.scm" if this implementation can compile files.
;;; See feature 'COMPILED.
(define slib:load-compiled
(let ((primitive-load load))
(lambda (<pathname> . rest)
(apply primitive-load (string->symbol (string-append name ".o")) rest))))
;;; At this point SLIB:LOAD must be able to load SLIB files.
(define slib:load slib:load-source) ;WARNING: redefining LOAD
;;; If your implementation provides R4RS macros:
;;(define macro:eval slib:eval)
;;(define macro:load slib:load-source)
;;; If your implementation provides syntax-case macros:
;;(define syncase:eval slib:eval)
;;(define syncase:load slib:load-source)
(slib:load (in-vicinity (library-vicinity) "require"))
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