| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * Grammar for FTP commands. |
| 9 | * See RFC 765. |
| 10 | */ |
| 11 | |
| 12 | %{ |
| 13 | |
| 14 | #ifndef lint |
| 15 | static char sccsid[] = "@(#)ftpcmd.y 5.2 (Berkeley) %G%"; |
| 16 | #endif |
| 17 | |
| 18 | #include <sys/types.h> |
| 19 | #include <sys/socket.h> |
| 20 | |
| 21 | #include <netinet/in.h> |
| 22 | |
| 23 | #include <arpa/ftp.h> |
| 24 | |
| 25 | #include <stdio.h> |
| 26 | #include <signal.h> |
| 27 | #include <ctype.h> |
| 28 | #include <pwd.h> |
| 29 | #include <setjmp.h> |
| 30 | |
| 31 | extern struct sockaddr_in data_dest; |
| 32 | extern int logged_in; |
| 33 | extern struct passwd *pw; |
| 34 | extern int guest; |
| 35 | extern int logging; |
| 36 | extern int type; |
| 37 | extern int form; |
| 38 | extern int debug; |
| 39 | extern int timeout; |
| 40 | extern char hostname[]; |
| 41 | extern char *globerr; |
| 42 | extern int usedefault; |
| 43 | char **glob(); |
| 44 | |
| 45 | static int cmd_type; |
| 46 | static int cmd_form; |
| 47 | static int cmd_bytesz; |
| 48 | |
| 49 | char *index(); |
| 50 | %} |
| 51 | |
| 52 | %token |
| 53 | A B C E F I |
| 54 | L N P R S T |
| 55 | |
| 56 | SP CRLF COMMA STRING NUMBER |
| 57 | |
| 58 | USER PASS ACCT REIN QUIT PORT |
| 59 | PASV TYPE STRU MODE RETR STOR |
| 60 | APPE MLFL MAIL MSND MSOM MSAM |
| 61 | MRSQ MRCP ALLO REST RNFR RNTO |
| 62 | ABOR DELE CWD LIST NLST SITE |
| 63 | STAT HELP NOOP XMKD XRMD XPWD |
| 64 | XCUP |
| 65 | |
| 66 | LEXERR |
| 67 | |
| 68 | %start cmd_list |
| 69 | |
| 70 | %% |
| 71 | |
| 72 | cmd_list: /* empty */ |
| 73 | | cmd_list cmd |
| 74 | ; |
| 75 | |
| 76 | cmd: USER SP username CRLF |
| 77 | = { |
| 78 | extern struct passwd *getpwnam(); |
| 79 | |
| 80 | if (strcmp($3, "ftp") == 0 || |
| 81 | strcmp($3, "anonymous") == 0) { |
| 82 | if ((pw = getpwnam("ftp")) != NULL) { |
| 83 | guest = 1; |
| 84 | reply(331, |
| 85 | "Guest login ok, send ident as password."); |
| 86 | } |
| 87 | } else if (checkuser($3)) { |
| 88 | guest = 0; |
| 89 | pw = getpwnam($3); |
| 90 | reply(331, "Password required for %s.", $3); |
| 91 | } |
| 92 | if (pw == NULL) |
| 93 | reply(530, "User %s unknown.", $3); |
| 94 | free($3); |
| 95 | } |
| 96 | | PASS SP password CRLF |
| 97 | = { |
| 98 | pass($3); |
| 99 | free($3); |
| 100 | } |
| 101 | | PORT SP host_port CRLF |
| 102 | = { |
| 103 | usedefault = 0; |
| 104 | ack($1); |
| 105 | } |
| 106 | | TYPE SP type_code CRLF |
| 107 | = { |
| 108 | switch (cmd_type) { |
| 109 | |
| 110 | case TYPE_A: |
| 111 | if (cmd_form == FORM_N) { |
| 112 | reply(200, "Type set to A."); |
| 113 | type = cmd_type; |
| 114 | form = cmd_form; |
| 115 | } else |
| 116 | reply(504, "Form must be N."); |
| 117 | break; |
| 118 | |
| 119 | case TYPE_E: |
| 120 | reply(504, "Type E not implemented."); |
| 121 | break; |
| 122 | |
| 123 | case TYPE_I: |
| 124 | reply(200, "Type set to I."); |
| 125 | type = cmd_type; |
| 126 | break; |
| 127 | |
| 128 | case TYPE_L: |
| 129 | if (cmd_bytesz == 8) { |
| 130 | reply(200, |
| 131 | "Type set to L (byte size 8)."); |
| 132 | type = cmd_type; |
| 133 | } else |
| 134 | reply(504, "Byte size must be 8."); |
| 135 | } |
| 136 | } |
| 137 | | STRU SP struct_code CRLF |
| 138 | = { |
| 139 | switch ($3) { |
| 140 | |
| 141 | case STRU_F: |
| 142 | reply(200, "STRU F ok."); |
| 143 | break; |
| 144 | |
| 145 | default: |
| 146 | reply(502, "Unimplemented STRU type."); |
| 147 | } |
| 148 | } |
| 149 | | MODE SP mode_code CRLF |
| 150 | = { |
| 151 | switch ($3) { |
| 152 | |
| 153 | case MODE_S: |
| 154 | reply(200, "MODE S ok."); |
| 155 | break; |
| 156 | |
| 157 | default: |
| 158 | reply(502, "Unimplemented MODE type."); |
| 159 | } |
| 160 | } |
| 161 | | ALLO SP NUMBER CRLF |
| 162 | = { |
| 163 | ack($1); |
| 164 | } |
| 165 | | RETR check_login SP pathname CRLF |
| 166 | = { |
| 167 | if ($2 && $4 != NULL) |
| 168 | retrieve(0, $4); |
| 169 | if ($4 != NULL) |
| 170 | free($4); |
| 171 | } |
| 172 | | STOR check_login SP pathname CRLF |
| 173 | = { |
| 174 | if ($2 && $4 != NULL) |
| 175 | store($4, "w"); |
| 176 | if ($4 != NULL) |
| 177 | free($4); |
| 178 | } |
| 179 | | APPE check_login SP pathname CRLF |
| 180 | = { |
| 181 | if ($2 && $4 != NULL) |
| 182 | store($4, "a"); |
| 183 | if ($4 != NULL) |
| 184 | free($4); |
| 185 | } |
| 186 | | NLST check_login CRLF |
| 187 | = { |
| 188 | if ($2) |
| 189 | retrieve("/bin/ls", ""); |
| 190 | } |
| 191 | | NLST check_login SP pathname CRLF |
| 192 | = { |
| 193 | if ($2 && $4 != NULL) |
| 194 | retrieve("/bin/ls %s", $4); |
| 195 | if ($4 != NULL) |
| 196 | free($4); |
| 197 | } |
| 198 | | LIST check_login CRLF |
| 199 | = { |
| 200 | if ($2) |
| 201 | retrieve("/bin/ls -lg", ""); |
| 202 | } |
| 203 | | LIST check_login SP pathname CRLF |
| 204 | = { |
| 205 | if ($2 && $4 != NULL) |
| 206 | retrieve("/bin/ls -lg %s", $4); |
| 207 | if ($4 != NULL) |
| 208 | free($4); |
| 209 | } |
| 210 | | DELE check_login SP pathname CRLF |
| 211 | = { |
| 212 | if ($2 && $4 != NULL) |
| 213 | delete($4); |
| 214 | if ($4 != NULL) |
| 215 | free($4); |
| 216 | } |
| 217 | | CWD check_login CRLF |
| 218 | = { |
| 219 | if ($2) |
| 220 | cwd(pw->pw_dir); |
| 221 | } |
| 222 | | CWD check_login SP pathname CRLF |
| 223 | = { |
| 224 | if ($2 && $4 != NULL) |
| 225 | cwd($4); |
| 226 | if ($4 != NULL) |
| 227 | free($4); |
| 228 | } |
| 229 | | rename_cmd |
| 230 | | HELP CRLF |
| 231 | = { |
| 232 | help(0); |
| 233 | } |
| 234 | | HELP SP STRING CRLF |
| 235 | = { |
| 236 | help($3); |
| 237 | } |
| 238 | | NOOP CRLF |
| 239 | = { |
| 240 | ack($1); |
| 241 | } |
| 242 | | XMKD check_login SP pathname CRLF |
| 243 | = { |
| 244 | if ($2 && $4 != NULL) |
| 245 | makedir($4); |
| 246 | if ($4 != NULL) |
| 247 | free($4); |
| 248 | } |
| 249 | | XRMD check_login SP pathname CRLF |
| 250 | = { |
| 251 | if ($2 && $4 != NULL) |
| 252 | removedir($4); |
| 253 | if ($4 != NULL) |
| 254 | free($4); |
| 255 | } |
| 256 | | XPWD check_login CRLF |
| 257 | = { |
| 258 | if ($2) |
| 259 | pwd(); |
| 260 | } |
| 261 | | XCUP check_login CRLF |
| 262 | = { |
| 263 | if ($2) |
| 264 | cwd(".."); |
| 265 | } |
| 266 | | QUIT CRLF |
| 267 | = { |
| 268 | reply(221, "Goodbye."); |
| 269 | dologout(0); |
| 270 | } |
| 271 | | error CRLF |
| 272 | = { |
| 273 | yyerrok; |
| 274 | } |
| 275 | ; |
| 276 | |
| 277 | username: STRING |
| 278 | ; |
| 279 | |
| 280 | password: STRING |
| 281 | ; |
| 282 | |
| 283 | byte_size: NUMBER |
| 284 | ; |
| 285 | |
| 286 | host_port: NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA |
| 287 | NUMBER COMMA NUMBER |
| 288 | = { |
| 289 | register char *a, *p; |
| 290 | |
| 291 | a = (char *)&data_dest.sin_addr; |
| 292 | a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7; |
| 293 | p = (char *)&data_dest.sin_port; |
| 294 | p[0] = $9; p[1] = $11; |
| 295 | data_dest.sin_family = AF_INET; |
| 296 | } |
| 297 | ; |
| 298 | |
| 299 | form_code: N |
| 300 | = { |
| 301 | $$ = FORM_N; |
| 302 | } |
| 303 | | T |
| 304 | = { |
| 305 | $$ = FORM_T; |
| 306 | } |
| 307 | | C |
| 308 | = { |
| 309 | $$ = FORM_C; |
| 310 | } |
| 311 | ; |
| 312 | |
| 313 | type_code: A |
| 314 | = { |
| 315 | cmd_type = TYPE_A; |
| 316 | cmd_form = FORM_N; |
| 317 | } |
| 318 | | A SP form_code |
| 319 | = { |
| 320 | cmd_type = TYPE_A; |
| 321 | cmd_form = $3; |
| 322 | } |
| 323 | | E |
| 324 | = { |
| 325 | cmd_type = TYPE_E; |
| 326 | cmd_form = FORM_N; |
| 327 | } |
| 328 | | E SP form_code |
| 329 | = { |
| 330 | cmd_type = TYPE_E; |
| 331 | cmd_form = $3; |
| 332 | } |
| 333 | | I |
| 334 | = { |
| 335 | cmd_type = TYPE_I; |
| 336 | } |
| 337 | | L |
| 338 | = { |
| 339 | cmd_type = TYPE_L; |
| 340 | cmd_bytesz = 8; |
| 341 | } |
| 342 | | L SP byte_size |
| 343 | = { |
| 344 | cmd_type = TYPE_L; |
| 345 | cmd_bytesz = $3; |
| 346 | } |
| 347 | /* this is for a bug in the BBN ftp */ |
| 348 | | L byte_size |
| 349 | = { |
| 350 | cmd_type = TYPE_L; |
| 351 | cmd_bytesz = $2; |
| 352 | } |
| 353 | ; |
| 354 | |
| 355 | struct_code: F |
| 356 | = { |
| 357 | $$ = STRU_F; |
| 358 | } |
| 359 | | R |
| 360 | = { |
| 361 | $$ = STRU_R; |
| 362 | } |
| 363 | | P |
| 364 | = { |
| 365 | $$ = STRU_P; |
| 366 | } |
| 367 | ; |
| 368 | |
| 369 | mode_code: S |
| 370 | = { |
| 371 | $$ = MODE_S; |
| 372 | } |
| 373 | | B |
| 374 | = { |
| 375 | $$ = MODE_B; |
| 376 | } |
| 377 | | C |
| 378 | = { |
| 379 | $$ = MODE_C; |
| 380 | } |
| 381 | ; |
| 382 | |
| 383 | pathname: pathstring |
| 384 | = { |
| 385 | if ($1 && strncmp($1, "~", 1) == 0) { |
| 386 | $$ = (int)*glob($1); |
| 387 | if (globerr != NULL) { |
| 388 | reply(550, globerr); |
| 389 | $$ = NULL; |
| 390 | } |
| 391 | free($1); |
| 392 | } else |
| 393 | $$ = $1; |
| 394 | } |
| 395 | ; |
| 396 | |
| 397 | pathstring: STRING |
| 398 | ; |
| 399 | |
| 400 | rename_cmd: rename_from rename_to |
| 401 | = { |
| 402 | if ($1 && $2) |
| 403 | renamecmd($1, $2); |
| 404 | else |
| 405 | reply(503, "Bad sequence of commands."); |
| 406 | if ($1) |
| 407 | free($1); |
| 408 | if ($2) |
| 409 | free($2); |
| 410 | } |
| 411 | ; |
| 412 | |
| 413 | rename_from: RNFR check_login SP pathname CRLF |
| 414 | = { |
| 415 | char *from = 0, *renamefrom(); |
| 416 | |
| 417 | if ($2 && $4) |
| 418 | from = renamefrom($4); |
| 419 | if (from == 0 && $4) |
| 420 | free($4); |
| 421 | $$ = (int)from; |
| 422 | } |
| 423 | ; |
| 424 | |
| 425 | rename_to: RNTO SP pathname CRLF |
| 426 | = { |
| 427 | $$ = $3; |
| 428 | } |
| 429 | ; |
| 430 | |
| 431 | check_login: /* empty */ |
| 432 | = { |
| 433 | if (logged_in) |
| 434 | $$ = 1; |
| 435 | else { |
| 436 | reply(530, "Please login with USER and PASS."); |
| 437 | $$ = 0; |
| 438 | } |
| 439 | } |
| 440 | ; |
| 441 | |
| 442 | %% |
| 443 | |
| 444 | extern jmp_buf errcatch; |
| 445 | |
| 446 | #define CMD 0 /* beginning of command */ |
| 447 | #define ARGS 1 /* expect miscellaneous arguments */ |
| 448 | #define STR1 2 /* expect SP followed by STRING */ |
| 449 | #define STR2 3 /* expect STRING */ |
| 450 | #define OSTR 4 /* optional STRING */ |
| 451 | |
| 452 | struct tab { |
| 453 | char *name; |
| 454 | short token; |
| 455 | short state; |
| 456 | short implemented; /* 1 if command is implemented */ |
| 457 | char *help; |
| 458 | }; |
| 459 | |
| 460 | struct tab cmdtab[] = { /* In order defined in RFC 765 */ |
| 461 | { "USER", USER, STR1, 1, "<sp> username" }, |
| 462 | { "PASS", PASS, STR1, 1, "<sp> password" }, |
| 463 | { "ACCT", ACCT, STR1, 0, "(specify account)" }, |
| 464 | { "REIN", REIN, ARGS, 0, "(reinitialize server state)" }, |
| 465 | { "QUIT", QUIT, ARGS, 1, "(terminate service)", }, |
| 466 | { "PORT", PORT, ARGS, 1, "<sp> b0, b1, b2, b3, b4" }, |
| 467 | { "PASV", PASV, ARGS, 0, "(set server in passive mode)" }, |
| 468 | { "TYPE", TYPE, ARGS, 1, "<sp> [ A | E | I | L ]" }, |
| 469 | { "STRU", STRU, ARGS, 1, "(specify file structure)" }, |
| 470 | { "MODE", MODE, ARGS, 1, "(specify transfer mode)" }, |
| 471 | { "RETR", RETR, STR1, 1, "<sp> file-name" }, |
| 472 | { "STOR", STOR, STR1, 1, "<sp> file-name" }, |
| 473 | { "APPE", APPE, STR1, 1, "<sp> file-name" }, |
| 474 | { "MLFL", MLFL, OSTR, 0, "(mail file)" }, |
| 475 | { "MAIL", MAIL, OSTR, 0, "(mail to user)" }, |
| 476 | { "MSND", MSND, OSTR, 0, "(mail send to terminal)" }, |
| 477 | { "MSOM", MSOM, OSTR, 0, "(mail send to terminal or mailbox)" }, |
| 478 | { "MSAM", MSAM, OSTR, 0, "(mail send to terminal and mailbox)" }, |
| 479 | { "MRSQ", MRSQ, OSTR, 0, "(mail recipient scheme question)" }, |
| 480 | { "MRCP", MRCP, STR1, 0, "(mail recipient)" }, |
| 481 | { "ALLO", ALLO, ARGS, 1, "allocate storage (vacuously)" }, |
| 482 | { "REST", REST, STR1, 0, "(restart command)" }, |
| 483 | { "RNFR", RNFR, STR1, 1, "<sp> file-name" }, |
| 484 | { "RNTO", RNTO, STR1, 1, "<sp> file-name" }, |
| 485 | { "ABOR", ABOR, ARGS, 0, "(abort operation)" }, |
| 486 | { "DELE", DELE, STR1, 1, "<sp> file-name" }, |
| 487 | { "CWD", CWD, OSTR, 1, "[ <sp> directory-name]" }, |
| 488 | { "XCWD", CWD, OSTR, 1, "[ <sp> directory-name ]" }, |
| 489 | { "LIST", LIST, OSTR, 1, "[ <sp> path-name ]" }, |
| 490 | { "NLST", NLST, OSTR, 1, "[ <sp> path-name ]" }, |
| 491 | { "SITE", SITE, STR1, 0, "(get site parameters)" }, |
| 492 | { "STAT", STAT, OSTR, 0, "(get server status)" }, |
| 493 | { "HELP", HELP, OSTR, 1, "[ <sp> <string> ]" }, |
| 494 | { "NOOP", NOOP, ARGS, 1, "" }, |
| 495 | { "XMKD", XMKD, STR1, 1, "<sp> path-name" }, |
| 496 | { "XRMD", XRMD, STR1, 1, "<sp> path-name" }, |
| 497 | { "XPWD", XPWD, ARGS, 1, "(return current directory)" }, |
| 498 | { "XCUP", XCUP, ARGS, 1, "(change to parent directory)" }, |
| 499 | { NULL, 0, 0, 0, 0 } |
| 500 | }; |
| 501 | |
| 502 | struct tab * |
| 503 | lookup(cmd) |
| 504 | char *cmd; |
| 505 | { |
| 506 | register struct tab *p; |
| 507 | |
| 508 | for (p = cmdtab; p->name != NULL; p++) |
| 509 | if (strcmp(cmd, p->name) == 0) |
| 510 | return (p); |
| 511 | return (0); |
| 512 | } |
| 513 | |
| 514 | #include <arpa/telnet.h> |
| 515 | |
| 516 | /* |
| 517 | * getline - a hacked up version of fgets to ignore TELNET escape codes. |
| 518 | */ |
| 519 | char * |
| 520 | getline(s, n, iop) |
| 521 | char *s; |
| 522 | register FILE *iop; |
| 523 | { |
| 524 | register c; |
| 525 | register char *cs; |
| 526 | |
| 527 | cs = s; |
| 528 | while (--n > 0 && (c = getc(iop)) >= 0) { |
| 529 | while (c == IAC) { |
| 530 | c = getc(iop); /* skip command */ |
| 531 | c = getc(iop); /* try next char */ |
| 532 | } |
| 533 | *cs++ = c; |
| 534 | if (c=='\n') |
| 535 | break; |
| 536 | } |
| 537 | if (c < 0 && cs == s) |
| 538 | return (NULL); |
| 539 | *cs++ = '\0'; |
| 540 | if (debug) { |
| 541 | fprintf(stderr, "FTPD: command: %s", s); |
| 542 | if (c != '\n') |
| 543 | putc('\n', stderr); |
| 544 | fflush(stderr); |
| 545 | } |
| 546 | return (s); |
| 547 | } |
| 548 | |
| 549 | static int |
| 550 | toolong() |
| 551 | { |
| 552 | long now; |
| 553 | extern char *ctime(); |
| 554 | |
| 555 | reply(421, |
| 556 | "Timeout (%d seconds): closing control connection.", timeout); |
| 557 | time(&now); |
| 558 | if (logging) { |
| 559 | fprintf(stderr, |
| 560 | "FTPD: User %s timed out after %d seconds at %s", |
| 561 | (pw ? pw -> pw_name : "unknown"), timeout, ctime(&now)); |
| 562 | fflush(stderr); |
| 563 | } |
| 564 | dologout(1); |
| 565 | } |
| 566 | |
| 567 | yylex() |
| 568 | { |
| 569 | static char cbuf[512]; |
| 570 | static int cpos, state; |
| 571 | register char *cp; |
| 572 | register struct tab *p; |
| 573 | int n; |
| 574 | char c; |
| 575 | |
| 576 | for (;;) { |
| 577 | switch (state) { |
| 578 | |
| 579 | case CMD: |
| 580 | signal(SIGALRM, toolong); |
| 581 | alarm(timeout); |
| 582 | if (getline(cbuf, sizeof(cbuf)-1, stdin) == NULL) { |
| 583 | reply(221, "You could at least say goodbye."); |
| 584 | dologout(0); |
| 585 | } |
| 586 | alarm(0); |
| 587 | if (index(cbuf, '\r')) { |
| 588 | cp = index(cbuf, '\r'); |
| 589 | cp[0] = '\n'; cp[1] = 0; |
| 590 | } |
| 591 | if (index(cbuf, ' ')) |
| 592 | cpos = index(cbuf, ' ') - cbuf; |
| 593 | else |
| 594 | cpos = 4; |
| 595 | c = cbuf[cpos]; |
| 596 | cbuf[cpos] = '\0'; |
| 597 | upper(cbuf); |
| 598 | p = lookup(cbuf); |
| 599 | cbuf[cpos] = c; |
| 600 | if (p != 0) { |
| 601 | if (p->implemented == 0) { |
| 602 | nack(p->name); |
| 603 | longjmp(errcatch); |
| 604 | /* NOTREACHED */ |
| 605 | } |
| 606 | state = p->state; |
| 607 | yylval = (int) p->name; |
| 608 | return (p->token); |
| 609 | } |
| 610 | break; |
| 611 | |
| 612 | case OSTR: |
| 613 | if (cbuf[cpos] == '\n') { |
| 614 | state = CMD; |
| 615 | return (CRLF); |
| 616 | } |
| 617 | /* FALL THRU */ |
| 618 | |
| 619 | case STR1: |
| 620 | if (cbuf[cpos] == ' ') { |
| 621 | cpos++; |
| 622 | state = STR2; |
| 623 | return (SP); |
| 624 | } |
| 625 | break; |
| 626 | |
| 627 | case STR2: |
| 628 | cp = &cbuf[cpos]; |
| 629 | n = strlen(cp); |
| 630 | cpos += n - 1; |
| 631 | /* |
| 632 | * Make sure the string is nonempty and \n terminated. |
| 633 | */ |
| 634 | if (n > 1 && cbuf[cpos] == '\n') { |
| 635 | cbuf[cpos] = '\0'; |
| 636 | yylval = copy(cp); |
| 637 | cbuf[cpos] = '\n'; |
| 638 | state = ARGS; |
| 639 | return (STRING); |
| 640 | } |
| 641 | break; |
| 642 | |
| 643 | case ARGS: |
| 644 | if (isdigit(cbuf[cpos])) { |
| 645 | cp = &cbuf[cpos]; |
| 646 | while (isdigit(cbuf[++cpos])) |
| 647 | ; |
| 648 | c = cbuf[cpos]; |
| 649 | cbuf[cpos] = '\0'; |
| 650 | yylval = atoi(cp); |
| 651 | cbuf[cpos] = c; |
| 652 | return (NUMBER); |
| 653 | } |
| 654 | switch (cbuf[cpos++]) { |
| 655 | |
| 656 | case '\n': |
| 657 | state = CMD; |
| 658 | return (CRLF); |
| 659 | |
| 660 | case ' ': |
| 661 | return (SP); |
| 662 | |
| 663 | case ',': |
| 664 | return (COMMA); |
| 665 | |
| 666 | case 'A': |
| 667 | case 'a': |
| 668 | return (A); |
| 669 | |
| 670 | case 'B': |
| 671 | case 'b': |
| 672 | return (B); |
| 673 | |
| 674 | case 'C': |
| 675 | case 'c': |
| 676 | return (C); |
| 677 | |
| 678 | case 'E': |
| 679 | case 'e': |
| 680 | return (E); |
| 681 | |
| 682 | case 'F': |
| 683 | case 'f': |
| 684 | return (F); |
| 685 | |
| 686 | case 'I': |
| 687 | case 'i': |
| 688 | return (I); |
| 689 | |
| 690 | case 'L': |
| 691 | case 'l': |
| 692 | return (L); |
| 693 | |
| 694 | case 'N': |
| 695 | case 'n': |
| 696 | return (N); |
| 697 | |
| 698 | case 'P': |
| 699 | case 'p': |
| 700 | return (P); |
| 701 | |
| 702 | case 'R': |
| 703 | case 'r': |
| 704 | return (R); |
| 705 | |
| 706 | case 'S': |
| 707 | case 's': |
| 708 | return (S); |
| 709 | |
| 710 | case 'T': |
| 711 | case 't': |
| 712 | return (T); |
| 713 | |
| 714 | } |
| 715 | break; |
| 716 | |
| 717 | default: |
| 718 | fatal("Unknown state in scanner."); |
| 719 | } |
| 720 | yyerror(); |
| 721 | state = CMD; |
| 722 | longjmp(errcatch); |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | upper(s) |
| 727 | char *s; |
| 728 | { |
| 729 | while (*s != '\0') { |
| 730 | if (islower(*s)) |
| 731 | *s = toupper(*s); |
| 732 | s++; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | copy(s) |
| 737 | char *s; |
| 738 | { |
| 739 | char *p; |
| 740 | extern char *malloc(); |
| 741 | |
| 742 | p = malloc(strlen(s) + 1); |
| 743 | if (p == NULL) |
| 744 | fatal("Ran out of memory."); |
| 745 | strcpy(p, s); |
| 746 | return ((int)p); |
| 747 | } |
| 748 | |
| 749 | help(s) |
| 750 | char *s; |
| 751 | { |
| 752 | register struct tab *c; |
| 753 | register int width, NCMDS; |
| 754 | |
| 755 | width = 0, NCMDS = 0; |
| 756 | for (c = cmdtab; c->name != NULL; c++) { |
| 757 | int len = strlen(c->name); |
| 758 | |
| 759 | if (c->implemented == 0) |
| 760 | len++; |
| 761 | if (len > width) |
| 762 | width = len; |
| 763 | NCMDS++; |
| 764 | } |
| 765 | width = (width + 8) &~ 7; |
| 766 | if (s == 0) { |
| 767 | register int i, j, w; |
| 768 | int columns, lines; |
| 769 | |
| 770 | lreply(214, |
| 771 | "The following commands are recognized (* =>'s unimplemented)."); |
| 772 | columns = 76 / width; |
| 773 | if (columns == 0) |
| 774 | columns = 1; |
| 775 | lines = (NCMDS + columns - 1) / columns; |
| 776 | for (i = 0; i < lines; i++) { |
| 777 | printf(" "); |
| 778 | for (j = 0; j < columns; j++) { |
| 779 | c = cmdtab + j * lines + i; |
| 780 | printf("%s%c", c->name, |
| 781 | c->implemented ? ' ' : '*'); |
| 782 | if (c + lines >= &cmdtab[NCMDS]) |
| 783 | break; |
| 784 | w = strlen(c->name); |
| 785 | while (w < width) { |
| 786 | putchar(' '); |
| 787 | w++; |
| 788 | } |
| 789 | } |
| 790 | printf("\r\n"); |
| 791 | } |
| 792 | fflush(stdout); |
| 793 | reply(214, "Direct comments to ftp-bugs@%s.", hostname); |
| 794 | return; |
| 795 | } |
| 796 | upper(s); |
| 797 | c = lookup(s); |
| 798 | if (c == (struct tab *)0) { |
| 799 | reply(504, "Unknown command %s.", s); |
| 800 | return; |
| 801 | } |
| 802 | if (c->implemented) |
| 803 | reply(214, "Syntax: %s %s", c->name, c->help); |
| 804 | else |
| 805 | reply(214, "%-*s\t%s; unimplemented.", width, c->name, c->help); |
| 806 | } |