Commit | Line | Data |
---|---|---|
3b600ead TL |
1 | %{ |
2 | int *getout(); | |
3 | %} | |
4 | %right '=' | |
5 | %left '+' '-' | |
6 | %left '*' '/' '%' | |
7 | %right '^' | |
8 | %left UMINUS | |
9 | ||
10 | %term LETTER DIGIT SQRT LENGTH _IF FFF EQ | |
11 | %term _WHILE _FOR NE LE GE INCR DECR | |
12 | %term _RETURN _BREAK _DEFINE BASE OBASE SCALE | |
13 | %term EQPL EQMI EQMUL EQDIV EQREM EQEXP | |
14 | %term _AUTO DOT | |
15 | %term QSTR | |
16 | ||
17 | %{ | |
18 | #include <stdio.h> | |
19 | int in; | |
20 | char cary[1000], *cp = { cary }; | |
21 | char string[1000], *str = {string}; | |
22 | int crs = '0'; | |
23 | int rcrs = '0'; /* reset crs */ | |
24 | int bindx = 0; | |
25 | int lev = 0; | |
26 | int ln; | |
27 | char *ss; | |
28 | int bstack[10] = { 0 }; | |
29 | char *numb[15] = { | |
30 | " 0", " 1", " 2", " 3", " 4", " 5", | |
31 | " 6", " 7", " 8", " 9", " 10", " 11", | |
32 | " 12", " 13", " 14" }; | |
33 | int *pre, *post; | |
34 | %} | |
35 | %% | |
36 | start : | |
37 | | start stat tail | |
38 | = output( $2 ); | |
39 | | start def dargs ')' '{' dlist slist '}' | |
40 | ={ bundle( 6,pre, $7, post ,"0",numb[lev],"Q"); | |
41 | conout( $$, $2 ); | |
42 | rcrs = crs; | |
43 | output( "" ); | |
44 | lev = bindx = 0; | |
45 | } | |
46 | ; | |
47 | ||
48 | dlist : tail | |
49 | | dlist _AUTO dlets tail | |
50 | ; | |
51 | ||
52 | stat : e | |
53 | ={ bundle(2, $1, "ps." ); } | |
54 | | | |
55 | ={ bundle(1, "" ); } | |
56 | | QSTR | |
57 | ={ bundle(3,"[",$1,"]P");} | |
58 | | LETTER '=' e | |
59 | ={ bundle(3, $3, "s", $1 ); } | |
60 | | LETTER '[' e ']' '=' e | |
61 | ={ bundle(4, $6, $3, ":", geta($1)); } | |
62 | | LETTER EQOP e | |
63 | ={ bundle(6, "l", $1, $3, $2, "s", $1 ); } | |
64 | | LETTER '[' e ']' EQOP e | |
65 | ={ bundle(8,$3, ";", geta($1), $6, $5, $3, ":", geta($1));} | |
66 | | _BREAK | |
67 | ={ bundle(2, numb[lev-bstack[bindx-1]], "Q" ); } | |
68 | | _RETURN '(' e ')' | |
69 | = bundle(4, $3, post, numb[lev], "Q" ); | |
70 | | _RETURN '(' ')' | |
71 | = bundle(4, "0", post, numb[lev], "Q" ); | |
72 | | _RETURN | |
73 | = bundle(4,"0",post,numb[lev],"Q"); | |
74 | | SCALE '=' e | |
75 | = bundle(2, $3, "k"); | |
76 | | SCALE EQOP e | |
77 | = bundle(4,"K",$3,$2,"k"); | |
78 | | BASE '=' e | |
79 | = bundle(2,$3, "i"); | |
80 | | BASE EQOP e | |
81 | = bundle(4,"I",$3,$2,"i"); | |
82 | | OBASE '=' e | |
83 | = bundle(2,$3,"o"); | |
84 | | OBASE EQOP e | |
85 | = bundle(4,"O",$3,$2,"o"); | |
86 | | '{' slist '}' | |
87 | ={ $$ = $2; } | |
88 | | FFF | |
89 | ={ bundle(1,"fY"); } | |
90 | | error | |
91 | ={ bundle(1,"c"); } | |
92 | | _IF CRS BLEV '(' re ')' stat | |
93 | ={ conout( $7, $2 ); | |
94 | bundle(3, $5, $2, " " ); | |
95 | } | |
96 | | _WHILE CRS '(' re ')' stat BLEV | |
97 | ={ bundle(3, $6, $4, $2 ); | |
98 | conout( $$, $2 ); | |
99 | bundle(3, $4, $2, " " ); | |
100 | } | |
101 | | fprefix CRS re ';' e ')' stat BLEV | |
102 | ={ bundle(5, $7, $5, "s.", $3, $2 ); | |
103 | conout( $$, $2 ); | |
104 | bundle(5, $1, "s.", $3, $2, " " ); | |
105 | } | |
106 | | '~' LETTER '=' e | |
107 | ={ bundle(3,$4,"S",$2); } | |
108 | ; | |
109 | ||
110 | EQOP : EQPL | |
111 | ={ $$ = "+"; } | |
112 | | EQMI | |
113 | ={ $$ = "-"; } | |
114 | | EQMUL | |
115 | ={ $$ = "*"; } | |
116 | | EQDIV | |
117 | ={ $$ = "/"; } | |
118 | | EQREM | |
119 | ={ $$ = "%%"; } | |
120 | | EQEXP | |
121 | ={ $$ = "^"; } | |
122 | ; | |
123 | ||
124 | fprefix : _FOR '(' e ';' | |
125 | ={ $$ = $3; } | |
126 | ; | |
127 | ||
128 | BLEV : | |
129 | ={ --bindx; } | |
130 | ; | |
131 | ||
132 | slist : stat | |
133 | | slist tail stat | |
134 | ={ bundle(2, $1, $3 ); } | |
135 | ; | |
136 | ||
137 | tail : '\n' | |
138 | ={ln++;} | |
139 | | ';' | |
140 | ; | |
141 | ||
142 | re : e EQ e | |
143 | = bundle(3, $1, $3, "=" ); | |
144 | | e '<' e | |
145 | = bundle(3, $1, $3, ">" ); | |
146 | | e '>' e | |
147 | = bundle(3, $1, $3, "<" ); | |
148 | | e NE e | |
149 | = bundle(3, $1, $3, "!=" ); | |
150 | | e GE e | |
151 | = bundle(3, $1, $3, "!>" ); | |
152 | | e LE e | |
153 | = bundle(3, $1, $3, "!<" ); | |
154 | | e | |
155 | = bundle(2, $1, " 0!=" ); | |
156 | ; | |
157 | ||
158 | e : e '+' e | |
159 | = bundle(3, $1, $3, "+" ); | |
160 | | e '-' e | |
161 | = bundle(3, $1, $3, "-" ); | |
162 | | '-' e %prec UMINUS | |
163 | = bundle(3, " 0", $2, "-" ); | |
164 | | e '*' e | |
165 | = bundle(3, $1, $3, "*" ); | |
166 | | e '/' e | |
167 | = bundle(3, $1, $3, "/" ); | |
168 | | e '%' e | |
169 | = bundle(3, $1, $3, "%%" ); | |
170 | | e '^' e | |
171 | = bundle(3, $1, $3, "^" ); | |
172 | | LETTER '[' e ']' | |
173 | ={ bundle(3,$3, ";", geta($1)); } | |
174 | | LETTER INCR | |
175 | = bundle(4, "l", $1, "d1+s", $1 ); | |
176 | | INCR LETTER | |
177 | = bundle(4, "l", $2, "1+ds", $2 ); | |
178 | | DECR LETTER | |
179 | = bundle(4, "l", $2, "1-ds", $2 ); | |
180 | | LETTER DECR | |
181 | = bundle(4, "l", $1, "d1-s", $1 ); | |
182 | | LETTER '[' e ']' INCR | |
183 | = bundle(7,$3,";",geta($1),"d1+",$3,":",geta($1)); | |
184 | | INCR LETTER '[' e ']' | |
185 | = bundle(7,$4,";",geta($2),"1+d",$4,":",geta($2)); | |
186 | | LETTER '[' e ']' DECR | |
187 | = bundle(7,$3,";",geta($1),"d1-",$3,":",geta($1)); | |
188 | | DECR LETTER '[' e ']' | |
189 | = bundle(7,$4,";",geta($2),"1-d",$4,":",geta($2)); | |
190 | | SCALE INCR | |
191 | = bundle(1,"Kd1+k"); | |
192 | | INCR SCALE | |
193 | = bundle(1,"K1+dk"); | |
194 | | SCALE DECR | |
195 | = bundle(1,"Kd1-k"); | |
196 | | DECR SCALE | |
197 | = bundle(1,"K1-dk"); | |
198 | | BASE INCR | |
199 | = bundle(1,"Id1+i"); | |
200 | | INCR BASE | |
201 | = bundle(1,"I1+di"); | |
202 | | BASE DECR | |
203 | = bundle(1,"Id1-i"); | |
204 | | DECR BASE | |
205 | = bundle(1,"I1-di"); | |
206 | | OBASE INCR | |
207 | = bundle(1,"Od1+o"); | |
208 | | INCR OBASE | |
209 | = bundle(1,"O1+do"); | |
210 | | OBASE DECR | |
211 | = bundle(1,"Od1-o"); | |
212 | | DECR OBASE | |
213 | = bundle(1,"O1-do"); | |
214 | | LETTER '(' cargs ')' | |
215 | = bundle(4, $3, "l", getf($1), "x" ); | |
216 | | LETTER '(' ')' | |
217 | = bundle(3, "l", getf($1), "x" ); | |
218 | | cons | |
219 | ={ bundle(2, " ", $1 ); } | |
220 | | DOT cons | |
221 | ={ bundle(2, " .", $2 ); } | |
222 | | cons DOT cons | |
223 | ={ bundle(4, " ", $1, ".", $3 ); } | |
224 | | cons DOT | |
225 | ={ bundle(3, " ", $1, "." ); } | |
226 | | DOT | |
227 | ={ $$ = "l."; } | |
228 | | LETTER | |
229 | = { bundle(2, "l", $1 ); } | |
230 | | LETTER '=' e | |
231 | ={ bundle(3, $3, "ds", $1 ); } | |
232 | | LETTER EQOP e %prec '=' | |
233 | ={ bundle(6, "l", $1, $3, $2, "ds", $1 ); } | |
234 | | LETTER '[' e ']' '=' e | |
235 | = { bundle(5,$6,"d",$3,":",geta($1)); } | |
236 | | LETTER '[' e ']' EQOP e | |
237 | = { bundle(9,$3,";",geta($1),$6,$5,"d",$3,":",geta($1)); } | |
238 | | LENGTH '(' e ')' | |
239 | = bundle(2,$3,"Z"); | |
240 | | SCALE '(' e ')' | |
241 | = bundle(2,$3,"X"); /* must be before '(' e ')' */ | |
242 | | '(' e ')' | |
243 | = { $$ = $2; } | |
244 | | '?' | |
245 | ={ bundle(1, "?" ); } | |
246 | | SQRT '(' e ')' | |
247 | ={ bundle(2, $3, "v" ); } | |
248 | | '~' LETTER | |
249 | ={ bundle(2,"L",$2); } | |
250 | | SCALE '=' e | |
251 | = bundle(2,$3,"dk"); | |
252 | | SCALE EQOP e %prec '=' | |
253 | = bundle(4,"K",$3,$2,"dk"); | |
254 | | BASE '=' e | |
255 | = bundle(2,$3,"di"); | |
256 | | BASE EQOP e %prec '=' | |
257 | = bundle(4,"I",$3,$2,"di"); | |
258 | | OBASE '=' e | |
259 | = bundle(2,$3,"do"); | |
260 | | OBASE EQOP e %prec '=' | |
261 | = bundle(4,"O",$3,$2,"do"); | |
262 | | SCALE | |
263 | = bundle(1,"K"); | |
264 | | BASE | |
265 | = bundle(1,"I"); | |
266 | | OBASE | |
267 | = bundle(1,"O"); | |
268 | ; | |
269 | ||
270 | cargs : eora | |
271 | | cargs ',' eora | |
272 | = bundle(2, $1, $3 ); | |
273 | ; | |
274 | eora: e | |
275 | | LETTER '[' ']' | |
276 | =bundle(2,"l",geta($1)); | |
277 | ; | |
278 | ||
279 | cons : constant | |
280 | ={ *cp++ = '\0'; } | |
281 | ||
282 | constant: | |
283 | '_' | |
284 | ={ $$ = cp; *cp++ = '_'; } | |
285 | | DIGIT | |
286 | ={ $$ = cp; *cp++ = $1; } | |
287 | | constant DIGIT | |
288 | ={ *cp++ = $2; } | |
289 | ; | |
290 | ||
291 | CRS : | |
292 | ={ $$ = cp; *cp++ = crs++; *cp++ = '\0'; | |
293 | if(crs == '[')crs+=3; | |
294 | if(crs == 'a')crs='{'; | |
295 | if(crs >= 0241){yyerror("program too big"); | |
296 | getout(); | |
297 | } | |
298 | bstack[bindx++] = lev++; } | |
299 | ; | |
300 | ||
301 | def : _DEFINE LETTER '(' | |
302 | ={ $$ = getf($2); | |
303 | pre = ""; | |
304 | post = ""; | |
305 | lev = 1; | |
306 | bstack[bindx=0] = 0; | |
307 | } | |
308 | ; | |
309 | ||
310 | dargs : | |
311 | | lora | |
312 | ={ pp( $1 ); } | |
313 | | dargs ',' lora | |
314 | ={ pp( $3 ); } | |
315 | ; | |
316 | ||
317 | dlets : lora | |
318 | ={ tp($1); } | |
319 | | dlets ',' lora | |
320 | ={ tp($3); } | |
321 | ; | |
322 | lora : LETTER | |
323 | | LETTER '[' ']' | |
324 | ={ $$ = geta($1); } | |
325 | ; | |
326 | ||
327 | %% | |
328 | # define error 256 | |
329 | ||
330 | int peekc = -1; | |
331 | int sargc; | |
332 | int ifile; | |
333 | char **sargv; | |
334 | ||
335 | char funtab[52] = { | |
336 | 01,0,02,0,03,0,04,0,05,0,06,0,07,0,010,0,011,0,012,0,013,0,014,0,015,0,016,0,017,0, | |
337 | 020,0,021,0,022,0,023,0,024,0,025,0,026,0,027,0,030,0,031,0,032,0 }; | |
338 | char atab[52] = { | |
339 | 0241,0,0242,0,0243,0,0244,0,0245,0,0246,0,0247,0,0250,0,0251,0,0252,0,0253,0, | |
340 | 0254,0,0255,0,0256,0,0257,0,0260,0,0261,0,0262,0,0263,0,0264,0,0265,0,0266,0, | |
341 | 0267,0,0270,0,0271,0,0272,0}; | |
342 | char *letr[26] = { | |
343 | "a","b","c","d","e","f","g","h","i","j", | |
344 | "k","l","m","n","o","p","q","r","s","t", | |
345 | "u","v","w","x","y","z" } ; | |
346 | char *dot = { "." }; | |
347 | yylex(){ | |
348 | int c, ch; | |
349 | restart: | |
350 | c = getch(); | |
351 | peekc = -1; | |
352 | while( c == ' ' || c == '\t' ) c = getch(); | |
353 | if(c == '\\'){ | |
354 | getch(); | |
355 | goto restart; | |
356 | } | |
357 | if( c<= 'z' && c >= 'a' ) { | |
358 | /* look ahead to look for reserved words */ | |
359 | peekc = getch(); | |
360 | if( peekc >= 'a' && peekc <= 'z' ){ /* must be reserved word */ | |
361 | if( c=='i' && peekc=='f' ){ c=_IF; goto skip; } | |
362 | if( c=='w' && peekc=='h' ){ c=_WHILE; goto skip; } | |
363 | if( c=='f' && peekc=='o' ){ c=_FOR; goto skip; } | |
364 | if( c=='s' && peekc=='q' ){ c=SQRT; goto skip; } | |
365 | if( c=='r' && peekc=='e' ){ c=_RETURN; goto skip; } | |
366 | if( c=='b' && peekc=='r' ){ c=_BREAK; goto skip; } | |
367 | if( c=='d' && peekc=='e' ){ c=_DEFINE; goto skip; } | |
368 | if( c=='s' && peekc=='c' ){ c= SCALE; goto skip; } | |
369 | if( c=='b' && peekc=='a' ){ c=BASE; goto skip; } | |
370 | if( c=='i' && peekc == 'b'){ c=BASE; goto skip; } | |
371 | if( c=='o' && peekc=='b' ){ c=OBASE; goto skip; } | |
372 | if( c=='d' && peekc=='i' ){ c=FFF; goto skip; } | |
373 | if( c=='a' && peekc=='u' ){ c=_AUTO; goto skip; } | |
374 | if( c == 'l' && peekc=='e'){ c=LENGTH; goto skip; } | |
375 | if( c == 'q' && peekc == 'u'){getout();} | |
376 | /* could not be found */ | |
377 | return( error ); | |
378 | skip: /* skip over rest of word */ | |
379 | peekc = -1; | |
380 | while( (ch = getch()) >= 'a' && ch <= 'z' ); | |
381 | peekc = ch; | |
382 | return( c ); | |
383 | } | |
384 | ||
385 | /* usual case; just one single letter */ | |
386 | ||
387 | yylval = letr[c-'a']; | |
388 | return( LETTER ); | |
389 | } | |
390 | if( c>= '0' && c <= '9' || c>= 'A' && c<= 'F' ){ | |
391 | yylval = c; | |
392 | return( DIGIT ); | |
393 | } | |
394 | switch( c ){ | |
395 | case '.': return( DOT ); | |
396 | case '=': | |
397 | switch( peekc = getch() ){ | |
398 | case '=': c=EQ; goto gotit; | |
399 | case '+': c=EQPL; goto gotit; | |
400 | case '-': c=EQMI; goto gotit; | |
401 | case '*': c=EQMUL; goto gotit; | |
402 | case '/': c=EQDIV; goto gotit; | |
403 | case '%': c=EQREM; goto gotit; | |
404 | case '^': c=EQEXP; goto gotit; | |
405 | default: return( '=' ); | |
406 | gotit: peekc = -1; return(c); | |
407 | } | |
408 | case '+': return( cpeek( '+', INCR, '+' ) ); | |
409 | case '-': return( cpeek( '-', DECR, '-' ) ); | |
410 | case '<': return( cpeek( '=', LE, '<' ) ); | |
411 | case '>': return( cpeek( '=', GE, '>' ) ); | |
412 | case '!': return( cpeek( '=', NE, '!' ) ); | |
413 | case '/': | |
414 | if((peekc = getch()) == '*'){ | |
415 | peekc = -1; | |
416 | while((getch() != '*') || ((peekc = getch()) != '/')); | |
417 | peekc = -1; | |
418 | goto restart; | |
419 | } | |
420 | else return(c); | |
421 | case '"': | |
422 | yylval = str; | |
423 | while((c=getch()) != '"'){*str++ = c; | |
424 | if(str >= &string[999]){yyerror("string space exceeded"); | |
425 | getout(); | |
426 | } | |
427 | } | |
428 | *str++ = '\0'; | |
429 | return(QSTR); | |
430 | default: return( c ); | |
431 | } | |
432 | } | |
433 | ||
434 | cpeek( c, yes, no ){ | |
435 | if( (peekc=getch()) != c ) return( no ); | |
436 | else { | |
437 | peekc = -1; | |
438 | return( yes ); | |
439 | } | |
440 | } | |
441 | ||
442 | getch(){ | |
443 | int ch; | |
444 | loop: | |
445 | ch = (peekc < 0) ? getc(in) : peekc; | |
446 | peekc = -1; | |
447 | if(ch != EOF)return(ch); | |
448 | if(++ifile > sargc){ | |
449 | if(ifile >= sargc+2)getout(); | |
450 | in = stdin; | |
451 | ln = 0; | |
452 | goto loop; | |
453 | } | |
454 | fclose(in); | |
455 | if((in = fopen(sargv[ifile],"r")) != NULL){ | |
456 | ln = 0; | |
457 | ss = sargv[ifile]; | |
458 | goto loop; | |
459 | } | |
460 | yyerror("cannot open input file"); | |
461 | } | |
462 | # define b_sp_max 3000 | |
463 | int b_space [ b_sp_max ]; | |
464 | int * b_sp_nxt = { b_space }; | |
465 | ||
466 | int bdebug = 0; | |
467 | bundle(a){ | |
468 | int i, *p, *q; | |
469 | ||
470 | p = &a; | |
471 | i = *p++; | |
472 | q = b_sp_nxt; | |
473 | if( bdebug ) printf("bundle %d elements at %o\n",i, q ); | |
474 | while(i-- > 0){ | |
475 | if( b_sp_nxt >= & b_space[b_sp_max] ) yyerror( "bundling space exceeded" ); | |
476 | * b_sp_nxt++ = *p++; | |
477 | } | |
478 | * b_sp_nxt++ = 0; | |
479 | yyval = q; | |
480 | return( q ); | |
481 | } | |
482 | ||
483 | routput(p) int *p; { | |
484 | if( bdebug ) printf("routput(%o)\n", p ); | |
485 | if( p >= &b_space[0] && p < &b_space[b_sp_max]){ | |
486 | /* part of a bundle */ | |
487 | while( *p != 0 ) routput( *p++ ); | |
488 | } | |
489 | else printf( p ); /* character string */ | |
490 | } | |
491 | ||
492 | output( p ) int *p; { | |
493 | routput( p ); | |
494 | b_sp_nxt = & b_space[0]; | |
495 | printf( "\n" ); | |
496 | fflush(stdout); | |
497 | cp = cary; | |
498 | crs = rcrs; | |
499 | } | |
500 | ||
501 | conout( p, s ) int *p; char *s; { | |
502 | printf("["); | |
503 | routput( p ); | |
504 | printf("]s%s\n", s ); | |
505 | fflush(stdout); | |
506 | lev--; | |
507 | } | |
508 | ||
509 | yyerror( s ) char *s; { | |
510 | if(ifile > sargc)ss="teletype"; | |
511 | printf("c[%s on line %d, %s]pc\n", s ,ln+1,ss); | |
512 | fflush(stdout); | |
513 | cp = cary; | |
514 | crs = rcrs; | |
515 | bindx = 0; | |
516 | lev = 0; | |
517 | b_sp_nxt = &b_space[0]; | |
518 | } | |
519 | ||
520 | pp( s ) char *s; { | |
521 | /* puts the relevant stuff on pre and post for the letter s */ | |
522 | ||
523 | bundle(3, "S", s, pre ); | |
524 | pre = yyval; | |
525 | bundle(4, post, "L", s, "s." ); | |
526 | post = yyval; | |
527 | } | |
528 | ||
529 | tp( s ) char *s; { /* same as pp, but for temps */ | |
530 | bundle(3, "0S", s, pre ); | |
531 | pre = yyval; | |
532 | bundle(4, post, "L", s, "s." ); | |
533 | post = yyval; | |
534 | } | |
535 | ||
536 | yyinit(argc,argv) int argc; char *argv[];{ | |
537 | signal( 2, (int(*)())1 ); /* ignore all interrupts */ | |
538 | sargv=argv; | |
539 | sargc= -- argc; | |
540 | if(sargc == 0)in=stdin; | |
541 | else if((in = fopen(sargv[1],"r")) == NULL) | |
542 | yyerror("cannot open input file"); | |
543 | ifile = 1; | |
544 | ln = 0; | |
545 | ss = sargv[1]; | |
546 | } | |
547 | int *getout(){ | |
548 | printf("q"); | |
549 | fflush(stdout); | |
550 | exit(); | |
551 | } | |
552 | ||
553 | int * | |
554 | getf(p) char *p;{ | |
555 | return(&funtab[2*(*p -0141)]); | |
556 | } | |
557 | int * | |
558 | geta(p) char *p;{ | |
559 | return(&atab[2*(*p - 0141)]); | |
560 | } | |
561 | ||
562 | main(argc, argv) | |
563 | char **argv; | |
564 | { | |
565 | int p[2]; | |
566 | ||
567 | ||
568 | if (argc > 1 && *argv[1] == '-') { | |
569 | if((argv[1][1] == 'd')||(argv[1][1] == 'c')){ | |
570 | yyinit(--argc, ++argv); | |
571 | yyparse(); | |
572 | exit(); | |
573 | } | |
574 | if(argv[1][1] != 'l'){ | |
575 | printf("unrecognizable argument\n"); | |
576 | fflush(stdout); | |
577 | exit(); | |
578 | } | |
579 | argv[1] = "/usr/lib/lib.b"; | |
580 | } | |
581 | pipe(p); | |
582 | if (fork()==0) { | |
583 | close(1); | |
584 | dup(p[1]); | |
585 | close(p[0]); | |
586 | close(p[1]); | |
587 | yyinit(argc, argv); | |
588 | yyparse(); | |
589 | exit(); | |
590 | } | |
591 | close(0); | |
592 | dup(p[0]); | |
593 | close(p[0]); | |
594 | close(p[1]); | |
595 | execl("/bin/dc", "dc", "-", 0); | |
596 | execl("/usr/bin/dc", "dc", "-", 0); | |
597 | } |