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53102063 C |
1 | /* ftpcmd.y - grammar for FTP commands */ |
2 | ||
3 | /* | |
4 | * $Header: /f/osi/ftp-ftam/RCS/ftpcmd.y,v 7.1 91/02/22 09:24:20 mrose Interim $ | |
5 | * | |
6 | * $Log: ftpcmd.y,v $ | |
7 | * Revision 7.1 91/02/22 09:24:20 mrose | |
8 | * Interim 6.8 | |
9 | * | |
10 | * Revision 7.0 89/11/23 21:55:19 mrose | |
11 | * Release 6.0 | |
12 | * | |
13 | */ | |
14 | ||
15 | /* | |
16 | * NOTICE | |
17 | * | |
18 | * Acquisition, use, and distribution of this module and related | |
19 | * materials are subject to the restrictions of a license agreement. | |
20 | * Consult the Preface in the User's Manual for the full terms of | |
21 | * this agreement. | |
22 | * | |
23 | */ | |
24 | ||
25 | ||
26 | /* | |
27 | * Shamelessly taken from UCB | |
28 | */ | |
29 | ||
30 | /* | |
31 | * Grammar for FTP commands. | |
32 | * See RFC 765. | |
33 | */ | |
34 | ||
35 | %{ | |
36 | ||
37 | #ifndef lint | |
38 | static char *rcsid = "$Header: /f/osi/ftp-ftam/RCS/ftpcmd.y,v 7.1 91/02/22 09:24:20 mrose Interim $"; | |
39 | #endif | |
40 | ||
41 | #include "config.h" | |
42 | #include "internet.h" | |
43 | ||
44 | #include <arpa/ftp.h> | |
45 | ||
46 | #include <stdio.h> | |
47 | #include <signal.h> | |
48 | #include <ctype.h> | |
49 | #include <pwd.h> | |
50 | #include <setjmp.h> | |
51 | #include "manifest.h" | |
52 | #include "general.h" | |
53 | void advise(); | |
54 | time_t time (); | |
55 | ||
56 | extern struct sockaddr_in data_dest; | |
57 | extern int logged_in; | |
58 | extern int logging; | |
59 | extern int type; | |
60 | extern int form; | |
61 | extern int debug; | |
62 | extern int timeout; | |
63 | extern char hostname[]; | |
64 | extern int usedefault; | |
65 | extern char *osi_host; | |
66 | extern char *ftp_user; | |
67 | extern char *ftp_passwd; | |
68 | extern char *ftp_account; | |
69 | extern int verbose; | |
70 | ||
71 | static int cmd_type; | |
72 | static int cmd_form; | |
73 | static int cmd_bytesz; | |
74 | ||
75 | char *index(); | |
76 | char *savestr(); | |
77 | %} | |
78 | ||
79 | %token | |
80 | A B C E F I | |
81 | L N P R S T | |
82 | ||
83 | SP CRLF COMMA STRING NUMBER | |
84 | ||
85 | USER PASS ACCT REIN QUIT PORT | |
86 | PASV TYPE STRU MODE RETR STOR | |
87 | APPE MLFL MAIL MSND MSOM MSAM | |
88 | MRSQ MRCP ALLO REST RNFR RNTO | |
89 | ABOR DELE CWD LIST NLST SITE | |
90 | STAT HELP NOOP XMKD XRMD XPWD | |
91 | XCUP | |
92 | ||
93 | LEXERR | |
94 | ||
95 | %start cmd_list | |
96 | ||
97 | %% | |
98 | ||
99 | cmd_list: /* empty */ | |
100 | | cmd_list cmd | |
101 | ; | |
102 | ||
103 | cmd: USER SP username CRLF | |
104 | = { | |
105 | /* remote host information may appear in user | |
106 | * name as user@osihost. Save user and hostname until | |
107 | * all neccessary information is gathered. | |
108 | */ | |
109 | char *op; | |
110 | ||
111 | ftp_user = savestr((char*)$3); | |
112 | if (op = index (ftp_user, '@')) { | |
113 | *op++ = NULL; | |
114 | osi_host = op; | |
115 | } | |
116 | ||
117 | if (strcmp(ftp_user, "ftp") == 0 || | |
118 | strcmp(ftp_user, "anonymous") == 0) { | |
119 | free(ftp_user); | |
120 | ftp_user = "ANON"; | |
121 | reply(331, | |
122 | "Guest login ok, send ident as password."); | |
123 | } else if (checkuser(ftp_user)) { | |
124 | reply(331, "Password required for \"%s\".", $3); | |
125 | } else | |
126 | reply(500,"User disallowed"); | |
127 | free((char*)$3); | |
128 | } | |
129 | | PASS SP password CRLF | |
130 | = { | |
131 | /* Try and login. dologin() checks if it has | |
132 | * all the neccessary information to try and login. | |
133 | * Appropriate response codes are generated. | |
134 | */ | |
135 | ftp_passwd = savestr((char*)$3); | |
136 | logged_in = dologin(); | |
137 | free((char*)$3); | |
138 | } | |
139 | | SITE SP osi_hostname CRLF | |
140 | = { | |
141 | osi_host = savestr((char*)$3); | |
142 | logged_in = ftp_passwd ? dologin() : 0; | |
143 | free((char*)$3); | |
144 | } | |
145 | | ACCT SP account CRLF | |
146 | = { | |
147 | ftp_account = savestr((char*)$3); | |
148 | logged_in = dologin(); | |
149 | free((char*)$3); | |
150 | } | |
151 | | PORT SP host_port CRLF | |
152 | = { | |
153 | usedefault = 0; | |
154 | ack((char*)$1); | |
155 | } | |
156 | | TYPE SP type_code CRLF | |
157 | = { | |
158 | /* The ISODE supports three file types: | |
159 | * binary | |
160 | * text | |
161 | * directory | |
162 | * Binary and Text are selected here. | |
163 | * Directory file types are used for LIST and NLST | |
164 | */ | |
165 | switch (cmd_type) { | |
166 | ||
167 | case TYPE_A: | |
168 | if (cmd_form == FORM_N && | |
169 | f_type(TYPE_A) != NOTOK) { | |
170 | reply(200, "Type set to A."); | |
171 | type = cmd_type; | |
172 | form = cmd_form; | |
173 | } else | |
174 | reply(504, "TYPE set error."); | |
175 | break; | |
176 | ||
177 | case TYPE_E: | |
178 | reply(504, "Type E not implemented."); | |
179 | break; | |
180 | ||
181 | case TYPE_I: | |
182 | if (f_type(TYPE_I) == OK){ | |
183 | reply(200, "Type set to I."); | |
184 | type = cmd_type; | |
185 | } else | |
186 | reply(504, "TYPE set error."); | |
187 | break; | |
188 | ||
189 | case TYPE_L: | |
190 | if (cmd_bytesz == 8 && f_type(TYPE_L) == OK) { | |
191 | reply(200, | |
192 | "Type set to L (byte size 8)."); | |
193 | type = cmd_type; | |
194 | } else | |
195 | reply(504, "TYPE set error."); | |
196 | } | |
197 | } | |
198 | | STRU SP struct_code CRLF | |
199 | = { | |
200 | switch ($3) { | |
201 | ||
202 | case STRU_F: | |
203 | reply(200, "STRU F ok."); | |
204 | break; | |
205 | ||
206 | default: | |
207 | reply(502, "Unimplemented STRU type."); | |
208 | } | |
209 | } | |
210 | | MODE SP mode_code CRLF | |
211 | = { | |
212 | switch ($3) { | |
213 | ||
214 | case MODE_S: | |
215 | reply(200, "MODE S ok."); | |
216 | break; | |
217 | ||
218 | default: | |
219 | reply(502, "Unimplemented MODE type."); | |
220 | } | |
221 | } | |
222 | | ALLO SP NUMBER CRLF | |
223 | = { | |
224 | ack((char*)$1); | |
225 | } | |
226 | | RETR check_login SP pathname CRLF | |
227 | = { | |
228 | if ($2 && $4 != NULL) | |
229 | retrieve((char*)$4); | |
230 | if ($4 != NULL) | |
231 | free((char*)$4); | |
232 | } | |
233 | | STOR check_login SP pathname CRLF | |
234 | = { | |
235 | if ($2 && $4 != NULL) | |
236 | ftp_store((char*)$4, "w"); | |
237 | if ($4 != NULL) | |
238 | free((char*)$4); | |
239 | } | |
240 | | APPE check_login SP pathname CRLF | |
241 | = { | |
242 | if ($2 && $4 != NULL) | |
243 | ftp_store((char *)$4, "a"); | |
244 | if ($4 != NULL) | |
245 | free((char*)$4); | |
246 | } | |
247 | | NLST check_login CRLF | |
248 | = { | |
249 | if ($2) | |
250 | directory("NLST","."); | |
251 | } | |
252 | | NLST check_login SP pathname CRLF | |
253 | = { | |
254 | if ($2 && $4 != NULL) | |
255 | directory("NLST", (char*)$4); | |
256 | if ($4 != NULL) | |
257 | free((char*)$4); | |
258 | } | |
259 | | LIST check_login CRLF | |
260 | = { | |
261 | if ($2) | |
262 | directory("LIST", "."); | |
263 | } | |
264 | | LIST check_login SP pathname CRLF | |
265 | = { | |
266 | if ($2 && $4 != NULL) | |
267 | directory("LIST", (char*)$4); | |
268 | if ($4 != NULL) | |
269 | free((char*)$4); | |
270 | } | |
271 | | DELE check_login SP pathname CRLF | |
272 | = { | |
273 | if ($2 && $4 != NULL) | |
274 | ftp_delete((char*)$4); | |
275 | if ($4 != NULL) | |
276 | free((char*)$4); | |
277 | } | |
278 | | rename_cmd | |
279 | | HELP CRLF | |
280 | = { | |
281 | help((char*)0); | |
282 | } | |
283 | | HELP SP STRING CRLF | |
284 | = { | |
285 | help((char*)$3); | |
286 | } | |
287 | | NOOP CRLF | |
288 | = { | |
289 | ack((char*)$1); | |
290 | } | |
291 | | XMKD check_login SP pathname CRLF | |
292 | = { | |
293 | if ($2 && $4 != NULL) | |
294 | (void)makedir((char*)$4); | |
295 | if ($4 != NULL) | |
296 | free((char*)$4); | |
297 | } | |
298 | | XRMD check_login SP pathname CRLF | |
299 | = { | |
300 | if ($2 && $4 != NULL) | |
301 | removedir((char*)$4); | |
302 | if ($4 != NULL) | |
303 | free((char*)$4); | |
304 | } | |
305 | | QUIT CRLF | |
306 | = { | |
307 | dologout(0); | |
308 | } | |
309 | | error CRLF | |
310 | = { | |
311 | yyerrok; | |
312 | } | |
313 | ; | |
314 | ||
315 | username: STRING | |
316 | ; | |
317 | ||
318 | password: STRING | |
319 | ; | |
320 | ||
321 | osi_hostname: STRING | |
322 | ; | |
323 | account: STRING | |
324 | ; | |
325 | ||
326 | byte_size: NUMBER | |
327 | ; | |
328 | ||
329 | host_port: NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA | |
330 | NUMBER COMMA NUMBER | |
331 | = { | |
332 | register char *a, *p; | |
333 | ||
334 | a = (char *)&data_dest.sin_addr; | |
335 | a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7; | |
336 | p = (char *)&data_dest.sin_port; | |
337 | p[0] = $9; p[1] = $11; | |
338 | data_dest.sin_family = AF_INET; | |
339 | } | |
340 | ; | |
341 | ||
342 | form_code: N | |
343 | = { | |
344 | $$ = FORM_N; | |
345 | } | |
346 | | T | |
347 | = { | |
348 | $$ = FORM_T; | |
349 | } | |
350 | | C | |
351 | = { | |
352 | $$ = FORM_C; | |
353 | } | |
354 | ; | |
355 | ||
356 | type_code: A | |
357 | = { | |
358 | cmd_type = TYPE_A; | |
359 | cmd_form = FORM_N; | |
360 | } | |
361 | | A SP form_code | |
362 | = { | |
363 | cmd_type = TYPE_A; | |
364 | cmd_form = $3; | |
365 | } | |
366 | | E | |
367 | = { | |
368 | cmd_type = TYPE_E; | |
369 | cmd_form = FORM_N; | |
370 | } | |
371 | | E SP form_code | |
372 | = { | |
373 | cmd_type = TYPE_E; | |
374 | cmd_form = $3; | |
375 | } | |
376 | | I | |
377 | = { | |
378 | cmd_type = TYPE_I; | |
379 | } | |
380 | | L | |
381 | = { | |
382 | cmd_type = TYPE_L; | |
383 | cmd_bytesz = 8; | |
384 | } | |
385 | | L SP byte_size | |
386 | = { | |
387 | cmd_type = TYPE_L; | |
388 | cmd_bytesz = $3; | |
389 | } | |
390 | /* this is for a bug in the BBN ftp */ | |
391 | | L byte_size | |
392 | = { | |
393 | cmd_type = TYPE_L; | |
394 | cmd_bytesz = $2; | |
395 | } | |
396 | ; | |
397 | ||
398 | struct_code: F | |
399 | = { | |
400 | $$ = STRU_F; | |
401 | } | |
402 | | R | |
403 | = { | |
404 | $$ = STRU_R; | |
405 | } | |
406 | | P | |
407 | = { | |
408 | $$ = STRU_P; | |
409 | } | |
410 | ; | |
411 | ||
412 | mode_code: S | |
413 | = { | |
414 | $$ = MODE_S; | |
415 | } | |
416 | | B | |
417 | = { | |
418 | $$ = MODE_B; | |
419 | } | |
420 | | C | |
421 | = { | |
422 | $$ = MODE_C; | |
423 | } | |
424 | ; | |
425 | ||
426 | pathname: pathstring | |
427 | = { | |
428 | $$ = $1; | |
429 | } | |
430 | ; | |
431 | ||
432 | pathstring: STRING | |
433 | ; | |
434 | ||
435 | rename_cmd: rename_from rename_to | |
436 | = { | |
437 | if ($1 && $2) | |
438 | renamecmd((char*)$1, (char*)$2); | |
439 | else | |
440 | reply(503, "Bad sequence of commands."); | |
441 | if ($1) | |
442 | free((char*)$1); | |
443 | if ($2) | |
444 | free((char*)$2); | |
445 | } | |
446 | ; | |
447 | ||
448 | rename_from: RNFR check_login SP pathname CRLF | |
449 | = { | |
450 | char *from = 0, *renamefrom(); | |
451 | ||
452 | if ($2 && $4) | |
453 | from = renamefrom((char*)$4); | |
454 | if (from == 0 && $4) | |
455 | free((char*)$4); | |
456 | $$ = (int)from; | |
457 | } | |
458 | ; | |
459 | ||
460 | rename_to: RNTO SP pathname CRLF | |
461 | = { | |
462 | $$ = $3; | |
463 | } | |
464 | ; | |
465 | ||
466 | check_login: /* empty */ | |
467 | = { | |
468 | if (logged_in) | |
469 | $$ = 1; | |
470 | else { | |
471 | reply(530, "Please login with USER and PASS."); | |
472 | $$ = 0; | |
473 | } | |
474 | } | |
475 | ; | |
476 | ||
477 | %% | |
478 | ||
479 | extern jmp_buf errcatch; | |
480 | ||
481 | #define CMD 0 /* beginning of command */ | |
482 | #define ARGS 1 /* expect miscellaneous arguments */ | |
483 | #define STR1 2 /* expect SP followed by STRING */ | |
484 | #define STR2 3 /* expect STRING */ | |
485 | #define OSTR 4 /* optional STRING */ | |
486 | ||
487 | struct tab { | |
488 | char *name; | |
489 | short token; | |
490 | short state; | |
491 | short implemented; /* 1 if command is implemented */ | |
492 | char *help; | |
493 | }; | |
494 | ||
495 | struct tab cmdtab[] = { /* In order defined in RFC 765 */ | |
496 | { "USER", USER, STR1, 1, "<sp> username" }, | |
497 | { "PASS", PASS, STR1, 1, "<sp> password" }, | |
498 | { "ACCT", ACCT, STR1, 1, "(specify account)" }, | |
499 | { "REIN", REIN, ARGS, 0, "(reinitialize server state)" }, | |
500 | { "QUIT", QUIT, ARGS, 1, "(terminate service)", }, | |
501 | { "PORT", PORT, ARGS, 1, "<sp> b0, b1, b2, b3, b4" }, | |
502 | { "PASV", PASV, ARGS, 0, "(set server in passive mode)" }, | |
503 | { "TYPE", TYPE, ARGS, 1, "<sp> [ A | E | I | L ]" }, | |
504 | { "STRU", STRU, ARGS, 1, "(specify file structure)" }, | |
505 | { "MODE", MODE, ARGS, 1, "(specify transfer mode)" }, | |
506 | { "RETR", RETR, STR1, 1, "<sp> file-name" }, | |
507 | { "STOR", STOR, STR1, 1, "<sp> file-name" }, | |
508 | { "APPE", APPE, STR1, 1, "<sp> file-name" }, | |
509 | { "MLFL", MLFL, OSTR, 0, "(mail file)" }, | |
510 | { "MAIL", MAIL, OSTR, 0, "(mail to user)" }, | |
511 | { "MSND", MSND, OSTR, 0, "(mail send to terminal)" }, | |
512 | { "MSOM", MSOM, OSTR, 0, "(mail send to terminal or mailbox)" }, | |
513 | { "MSAM", MSAM, OSTR, 0, "(mail send to terminal and mailbox)" }, | |
514 | { "MRSQ", MRSQ, OSTR, 0, "(mail recipient scheme question)" }, | |
515 | { "MRCP", MRCP, STR1, 0, "(mail recipient)" }, | |
516 | { "ALLO", ALLO, ARGS, 1, "allocate storage (vacuously)" }, | |
517 | { "REST", REST, STR1, 0, "(restart command)" }, | |
518 | { "RNFR", RNFR, STR1, 1, "<sp> file-name" }, | |
519 | { "RNTO", RNTO, STR1, 1, "<sp> file-name" }, | |
520 | { "ABOR", ABOR, ARGS, 0, "(abort operation)" }, | |
521 | { "DELE", DELE, STR1, 1, "<sp> file-name" }, | |
522 | /* Most directory oriented commands (except XMKD and XRMD) are | |
523 | * not supported. The ISODE FTAM requires more knowledge | |
524 | * about the remote filesystem type than is available through FTP. | |
525 | */ | |
526 | { "CWD", CWD, OSTR, 0, "[ <sp> directory-name]" }, | |
527 | { "XCWD", CWD, OSTR, 0, "[ <sp> directory-name ]" }, | |
528 | { "LIST", LIST, OSTR, 1, "[ <sp> path-name ]" }, | |
529 | { "NLST", NLST, OSTR, 1, "[ <sp> path-name ]" }, | |
530 | { "SITE", SITE, STR1, 1, "(get site parameters)" }, | |
531 | { "STAT", STAT, OSTR, 0, "(get server status)" }, | |
532 | { "HELP", HELP, OSTR, 1, "[ <sp> <string> ]" }, | |
533 | { "NOOP", NOOP, ARGS, 1, "" }, | |
534 | { "XMKD", XMKD, STR1, 1, "<sp> path-name" }, | |
535 | { "XRMD", XRMD, STR1, 1, "<sp> path-name" }, | |
536 | { "XPWD", XPWD, ARGS, 0, "(return current directory)" }, | |
537 | { "XCUP", XCUP, ARGS, 0, "(change to parent directory)" }, | |
538 | { NULL, 0, 0, 0, 0 } | |
539 | }; | |
540 | ||
541 | struct tab * | |
542 | lookup(cmd) | |
543 | char *cmd; | |
544 | { | |
545 | register struct tab *p; | |
546 | ||
547 | for (p = cmdtab; p->name != NULL; p++) | |
548 | if (strcmp(cmd, p->name) == 0) | |
549 | return (p); | |
550 | return (0); | |
551 | } | |
552 | ||
553 | #include <arpa/telnet.h> | |
554 | ||
555 | /* | |
556 | * getline - a hacked up version of fgets to ignore TELNET escape codes. | |
557 | */ | |
558 | char * | |
559 | getline(s, n, iop) | |
560 | char *s; | |
561 | register FILE *iop; | |
562 | { | |
563 | register c; | |
564 | register char *cs; | |
565 | ||
566 | cs = s; | |
567 | while (--n > 0 && (c = getc(iop)) >= 0) { | |
568 | while (c == IAC) { | |
569 | c = getc(iop); /* skip command */ | |
570 | c = getc(iop); /* try next char */ | |
571 | } | |
572 | *cs++ = c; | |
573 | if (c=='\n') | |
574 | break; | |
575 | } | |
576 | if (c < 0 && cs == s) | |
577 | exit(1); | |
578 | *cs++ = '\0'; | |
579 | if (verbose) | |
580 | advise (NULLCP, "---> %s", s); | |
581 | return (s); | |
582 | } | |
583 | ||
584 | static SFD | |
585 | toolong() | |
586 | { | |
587 | long now; | |
588 | extern char *ctime(); | |
589 | ||
590 | reply(421, | |
591 | "Timeout (%d seconds): closing control connection.", timeout); | |
592 | (void)time(&now); | |
593 | if (logging) | |
594 | advise(NULLCP, | |
595 | "user %s timed out after %d seconds at %s", | |
596 | ftp_user, timeout, ctime(&now)); | |
597 | dologout(1); | |
598 | } | |
599 | ||
600 | yylex() | |
601 | { | |
602 | static char cbuf[512]; | |
603 | static int cpos, state; | |
604 | register char *cp; | |
605 | register struct tab *p; | |
606 | int n; | |
607 | char c; | |
608 | ||
609 | for (;;) { | |
610 | switch (state) { | |
611 | ||
612 | case CMD: | |
613 | (void)signal(SIGALRM, toolong); | |
614 | (void)alarm((unsigned)timeout); | |
615 | if (getline(cbuf, sizeof(cbuf)-1, stdin) == NULL) { | |
616 | dologout(0); | |
617 | } | |
618 | (void)alarm(0); | |
619 | if (index(cbuf, '\r')) { | |
620 | cp = index(cbuf, '\r'); | |
621 | cp[0] = '\n'; cp[1] = 0; | |
622 | } | |
623 | if (index(cbuf, ' ')) | |
624 | cpos = index(cbuf, ' ') - cbuf; | |
625 | else | |
626 | cpos = 4; | |
627 | c = cbuf[cpos]; | |
628 | cbuf[cpos] = '\0'; | |
629 | upper(cbuf); | |
630 | p = lookup(cbuf); | |
631 | cbuf[cpos] = c; | |
632 | if (p != 0) { | |
633 | if (p->implemented == 0) { | |
634 | nack(p->name); | |
635 | longjmp(errcatch,NOTOK); | |
636 | /* NOTREACHED */ | |
637 | } | |
638 | state = p->state; | |
639 | yylval = (int) p->name; | |
640 | return (p->token); | |
641 | } | |
642 | break; | |
643 | ||
644 | case OSTR: | |
645 | if (cbuf[cpos] == '\n') { | |
646 | state = CMD; | |
647 | return (CRLF); | |
648 | } | |
649 | /* FALL THRU */ | |
650 | ||
651 | case STR1: | |
652 | if (cbuf[cpos] == ' ') { | |
653 | /* trim leading blanks */ | |
654 | for(;cbuf[cpos] == ' ';cpos++); | |
655 | state = STR2; | |
656 | return (SP); | |
657 | } | |
658 | break; | |
659 | ||
660 | case STR2: | |
661 | cp = &cbuf[cpos]; | |
662 | n = strlen(cp); | |
663 | cpos += n - 1; | |
664 | /* | |
665 | * Make sure the string is nonempty and \n terminated. | |
666 | */ | |
667 | if (n > 1 && cbuf[cpos] == '\n') { | |
668 | cbuf[cpos] = '\0'; | |
669 | yylval = copy(cp); | |
670 | cbuf[cpos] = '\n'; | |
671 | state = ARGS; | |
672 | return (STRING); | |
673 | } | |
674 | break; | |
675 | ||
676 | case ARGS: | |
677 | if (isdigit(cbuf[cpos])) { | |
678 | cp = &cbuf[cpos]; | |
679 | while (isdigit(cbuf[++cpos])) | |
680 | ; | |
681 | c = cbuf[cpos]; | |
682 | cbuf[cpos] = '\0'; | |
683 | yylval = atoi(cp); | |
684 | cbuf[cpos] = c; | |
685 | return (NUMBER); | |
686 | } | |
687 | switch (cbuf[cpos++]) { | |
688 | ||
689 | case '\n': | |
690 | state = CMD; | |
691 | return (CRLF); | |
692 | ||
693 | case ' ': | |
694 | return (SP); | |
695 | ||
696 | case ',': | |
697 | return (COMMA); | |
698 | ||
699 | case 'A': | |
700 | case 'a': | |
701 | return (A); | |
702 | ||
703 | case 'B': | |
704 | case 'b': | |
705 | return (B); | |
706 | ||
707 | case 'C': | |
708 | case 'c': | |
709 | return (C); | |
710 | ||
711 | case 'E': | |
712 | case 'e': | |
713 | return (E); | |
714 | ||
715 | case 'F': | |
716 | case 'f': | |
717 | return (F); | |
718 | ||
719 | case 'I': | |
720 | case 'i': | |
721 | return (I); | |
722 | ||
723 | case 'L': | |
724 | case 'l': | |
725 | return (L); | |
726 | ||
727 | case 'N': | |
728 | case 'n': | |
729 | return (N); | |
730 | ||
731 | case 'P': | |
732 | case 'p': | |
733 | return (P); | |
734 | ||
735 | case 'R': | |
736 | case 'r': | |
737 | return (R); | |
738 | ||
739 | case 'S': | |
740 | case 's': | |
741 | return (S); | |
742 | ||
743 | case 'T': | |
744 | case 't': | |
745 | return (T); | |
746 | ||
747 | } | |
748 | break; | |
749 | ||
750 | default: | |
751 | fatal("Unknown state in scanner."); | |
752 | } | |
753 | yyerror(""); | |
754 | state = CMD; | |
755 | longjmp(errcatch,NOTOK); | |
756 | } | |
757 | } | |
758 | ||
759 | upper(s) | |
760 | char *s; | |
761 | { | |
762 | while (*s != '\0') { | |
763 | if (islower(*s)) | |
764 | *s = toupper(*s); | |
765 | s++; | |
766 | } | |
767 | } | |
768 | ||
769 | copy(s) | |
770 | char *s; | |
771 | { | |
772 | char *p; | |
773 | extern char *malloc(); | |
774 | ||
775 | p = malloc((unsigned) (strlen(s) + 1)); | |
776 | if (p == NULL) | |
777 | fatal("Ran out of memory."); | |
778 | (void)strcpy(p, s); | |
779 | return ((int)p); | |
780 | } | |
781 | ||
782 | help(s) | |
783 | char *s; | |
784 | { | |
785 | register struct tab *c; | |
786 | register int width, NCMDS; | |
787 | ||
788 | width = 0, NCMDS = 0; | |
789 | for (c = cmdtab; c->name != NULL; c++) { | |
790 | int len = strlen(c->name); | |
791 | ||
792 | if (c->implemented == 0) | |
793 | len++; | |
794 | if (len > width) | |
795 | width = len; | |
796 | NCMDS++; | |
797 | } | |
798 | width = (width + 8) &~ 7; | |
799 | if (s == 0) { | |
800 | register int i, j, w; | |
801 | int columns, lines; | |
802 | ||
803 | lreply(214, | |
804 | "The following commands are recognized (* =>'s unimplemented)."); | |
805 | columns = 76 / width; | |
806 | if (columns == 0) | |
807 | columns = 1; | |
808 | lines = (NCMDS + columns - 1) / columns; | |
809 | for (i = 0; i < lines; i++) { | |
810 | printf(" "); | |
811 | for (j = 0; j < columns; j++) { | |
812 | c = cmdtab + j * lines + i; | |
813 | printf("%s%c", c->name, | |
814 | c->implemented ? ' ' : '*'); | |
815 | if (c + lines >= &cmdtab[NCMDS]) | |
816 | break; | |
817 | w = strlen(c->name); | |
818 | while (w < width) { | |
819 | putchar(' '); | |
820 | w++; | |
821 | } | |
822 | } | |
823 | printf("\r\n"); | |
824 | } | |
825 | (void)fflush(stdout); | |
826 | reply(214, "Direct comments to ftp-bugs@%s.", hostname); | |
827 | return; | |
828 | } | |
829 | upper(s); | |
830 | c = lookup(s); | |
831 | if (c == (struct tab *)0) { | |
832 | reply(504, "Unknown command %s.", s); | |
833 | return; | |
834 | } | |
835 | if (c->implemented) | |
836 | reply(214, "Syntax: %s %s", c->name, c->help); | |
837 | else | |
838 | reply(214, "%-*s\t%s; unimplemented.", width, c->name, c->help); | |
839 | } |