cmd3.c revision 1.21
1 /* $NetBSD: cmd3.c,v 1.21 2003/08/07 11:14:36 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)cmd3.c 8.2 (Berkeley) 4/20/95"; 36 #else 37 __RCSID("$NetBSD: cmd3.c,v 1.21 2003/08/07 11:14:36 agc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include "rcv.h" 42 #include "extern.h" 43 44 /* 45 * Mail -- a mail program 46 * 47 * Still more user commands. 48 */ 49 static int diction(const void *, const void *); 50 51 /* 52 * Process a shell escape by saving signals, ignoring signals, 53 * and forking a sh -c 54 */ 55 int 56 shell(void *v) 57 { 58 char *str = v; 59 sig_t sigint = signal(SIGINT, SIG_IGN); 60 char *shellcmd; 61 char cmd[BUFSIZ]; 62 63 (void)strcpy(cmd, str); 64 if (bangexp(cmd) < 0) 65 return 1; 66 if ((shellcmd = value("SHELL")) == NULL) 67 shellcmd = _PATH_CSHELL; 68 (void)run_command(shellcmd, 0, -1, -1, "-c", cmd, NULL); 69 (void)signal(SIGINT, sigint); 70 printf("!\n"); 71 return 0; 72 } 73 74 /* 75 * Fork an interactive shell. 76 */ 77 /*ARGSUSED*/ 78 int 79 dosh(void *v) 80 { 81 sig_t sigint = signal(SIGINT, SIG_IGN); 82 char *shellcmd; 83 84 if ((shellcmd = value("SHELL")) == NULL) 85 shellcmd = _PATH_CSHELL; 86 (void)run_command(shellcmd, 0, -1, -1, NULL); 87 (void)signal(SIGINT, sigint); 88 putchar('\n'); 89 return 0; 90 } 91 92 /* 93 * Expand the shell escape by expanding unescaped !'s into the 94 * last issued command where possible. 95 */ 96 97 char lastbang[128]; 98 99 int 100 bangexp(char *str) 101 { 102 char bangbuf[BUFSIZ]; 103 char *cp, *cp2; 104 int n; 105 int changed = 0; 106 107 cp = str; 108 cp2 = bangbuf; 109 n = BUFSIZ; 110 while (*cp) { 111 if (*cp == '!') { 112 if (n < strlen(lastbang)) { 113 overf: 114 printf("Command buffer overflow\n"); 115 return(-1); 116 } 117 changed++; 118 strcpy(cp2, lastbang); 119 cp2 += strlen(lastbang); 120 n -= strlen(lastbang); 121 cp++; 122 continue; 123 } 124 if (*cp == '\\' && cp[1] == '!') { 125 if (--n <= 1) 126 goto overf; 127 *cp2++ = '!'; 128 cp += 2; 129 changed++; 130 } 131 if (--n <= 1) 132 goto overf; 133 *cp2++ = *cp++; 134 } 135 *cp2 = 0; 136 if (changed) { 137 printf("!%s\n", bangbuf); 138 fflush(stdout); 139 } 140 strcpy(str, bangbuf); 141 strncpy(lastbang, bangbuf, 128); 142 lastbang[127] = 0; 143 return(0); 144 } 145 146 /* 147 * Print out a nice help message from some file or another. 148 */ 149 150 int 151 help(void *v) 152 { 153 int c; 154 FILE *f; 155 156 if ((f = Fopen(_PATH_HELP, "r")) == NULL) { 157 warn(_PATH_HELP); 158 return(1); 159 } 160 while ((c = getc(f)) != EOF) 161 putchar(c); 162 Fclose(f); 163 return(0); 164 } 165 166 /* 167 * Change user's working directory. 168 */ 169 int 170 schdir(void *v) 171 { 172 char **arglist = v; 173 char *cp; 174 175 if (*arglist == NULL) 176 cp = homedir; 177 else 178 if ((cp = expand(*arglist)) == NULL) 179 return(1); 180 if (chdir(cp) < 0) { 181 warn("%s", cp); 182 return(1); 183 } 184 return 0; 185 } 186 187 int 188 respond(void *v) 189 { 190 int *msgvec = v; 191 if (value("Replyall") == NULL) 192 return (_respond(msgvec)); 193 else 194 return (_Respond(msgvec)); 195 } 196 197 /* 198 * Reply to a list of messages. Extract each name from the 199 * message header and send them off to mail1() 200 */ 201 int 202 _respond(int *msgvec) 203 { 204 struct message *mp; 205 char *cp, *rcv, *replyto; 206 char **ap; 207 struct name *np; 208 struct header head; 209 210 if (msgvec[1] != 0) { 211 printf("Sorry, can't reply to multiple messages at once\n"); 212 return(1); 213 } 214 mp = &message[msgvec[0] - 1]; 215 touch(mp); 216 dot = mp; 217 if ((rcv = skin(hfield("from", mp))) == NULL) 218 rcv = skin(nameof(mp, 1)); 219 if ((replyto = skin(hfield("reply-to", mp))) != NULL) 220 np = extract(replyto, GTO); 221 else if ((cp = skin(hfield("to", mp))) != NULL) 222 np = extract(cp, GTO); 223 else 224 np = NULL; 225 np = elide(np); 226 /* 227 * Delete my name from the reply list, 228 * and with it, all my alternate names. 229 */ 230 np = delname(np, myname); 231 if (altnames) 232 for (ap = altnames; *ap; ap++) 233 np = delname(np, *ap); 234 if (np != NULL && replyto == NULL) 235 np = cat(np, extract(rcv, GTO)); 236 else if (np == NULL) { 237 if (replyto != NULL) 238 printf("Empty reply-to field -- replying to author\n"); 239 np = extract(rcv, GTO); 240 } 241 head.h_to = np; 242 if ((head.h_subject = hfield("subject", mp)) == NULL) 243 head.h_subject = hfield("subj", mp); 244 head.h_subject = reedit(head.h_subject); 245 if (replyto == NULL && (cp = skin(hfield("cc", mp))) != NULL) { 246 np = elide(extract(cp, GCC)); 247 np = delname(np, myname); 248 if (altnames != 0) 249 for (ap = altnames; *ap; ap++) 250 np = delname(np, *ap); 251 head.h_cc = np; 252 } else 253 head.h_cc = NULL; 254 head.h_bcc = NULL; 255 head.h_smopts = NULL; 256 mail1(&head, 1); 257 return(0); 258 } 259 260 /* 261 * Modify the subject we are replying to to begin with Re: if 262 * it does not already. 263 */ 264 char * 265 reedit(char *subj) 266 { 267 char *newsubj; 268 269 if (subj == NULL) 270 return NULL; 271 if ((subj[0] == 'r' || subj[0] == 'R') && 272 (subj[1] == 'e' || subj[1] == 'E') && 273 subj[2] == ':') 274 return subj; 275 newsubj = salloc(strlen(subj) + 5); 276 strcpy(newsubj, "Re: "); 277 strcpy(newsubj + 4, subj); 278 return newsubj; 279 } 280 281 /* 282 * Preserve the named messages, so that they will be sent 283 * back to the system mailbox. 284 */ 285 int 286 preserve(void *v) 287 { 288 int *msgvec = v; 289 struct message *mp; 290 int *ip, mesg; 291 292 if (edit) { 293 printf("Cannot \"preserve\" in edit mode\n"); 294 return(1); 295 } 296 for (ip = msgvec; *ip != 0; ip++) { 297 mesg = *ip; 298 mp = &message[mesg-1]; 299 mp->m_flag |= MPRESERVE; 300 mp->m_flag &= ~MBOX; 301 dot = mp; 302 } 303 return(0); 304 } 305 306 /* 307 * Mark all given messages as unread. 308 */ 309 int 310 unread(void *v) 311 { 312 int *msgvec = v; 313 int *ip; 314 315 for (ip = msgvec; *ip != 0; ip++) { 316 dot = &message[*ip-1]; 317 dot->m_flag &= ~(MREAD|MTOUCH); 318 dot->m_flag |= MSTATUS; 319 } 320 return(0); 321 } 322 323 /* 324 * Print the size of each message. 325 */ 326 int 327 messize(void *v) 328 { 329 int *msgvec = v; 330 struct message *mp; 331 int *ip, mesg; 332 333 for (ip = msgvec; *ip != 0; ip++) { 334 mesg = *ip; 335 mp = &message[mesg-1]; 336 printf("%d: %ld/%ld\n", mesg, mp->m_blines, mp->m_size); 337 } 338 return(0); 339 } 340 341 /* 342 * Quit quickly. If we are sourcing, just pop the input level 343 * by returning an error. 344 */ 345 int 346 rexit(void *v) 347 { 348 if (sourcing) 349 return(1); 350 exit(0); 351 /*NOTREACHED*/ 352 } 353 354 /* 355 * Set or display a variable value. Syntax is similar to that 356 * of csh. 357 */ 358 int 359 set(void *v) 360 { 361 char **arglist = v; 362 struct var *vp; 363 char *cp, *cp2; 364 char varbuf[BUFSIZ], **ap, **p; 365 int errs, h, s; 366 367 if (*arglist == NULL) { 368 for (h = 0, s = 1; h < HSHSIZE; h++) 369 for (vp = variables[h]; vp != NULL; vp = vp->v_link) 370 s++; 371 ap = (char **) salloc(s * sizeof *ap); 372 for (h = 0, p = ap; h < HSHSIZE; h++) 373 for (vp = variables[h]; vp != NULL; vp = vp->v_link) 374 *p++ = vp->v_name; 375 *p = NULL; 376 sort(ap); 377 for (p = ap; *p != NULL; p++) 378 printf("%s\t%s\n", *p, value(*p)); 379 return(0); 380 } 381 errs = 0; 382 for (ap = arglist; *ap != NULL; ap++) { 383 cp = *ap; 384 cp2 = varbuf; 385 while (*cp != '=' && *cp != '\0') 386 *cp2++ = *cp++; 387 *cp2 = '\0'; 388 if (*cp == '\0') 389 cp = ""; 390 else 391 cp++; 392 if (equal(varbuf, "")) { 393 printf("Non-null variable name required\n"); 394 errs++; 395 continue; 396 } 397 assign(varbuf, cp); 398 } 399 return(errs); 400 } 401 402 /* 403 * Unset a bunch of variable values. 404 */ 405 int 406 unset(void *v) 407 { 408 char **arglist = v; 409 struct var *vp, *vp2; 410 int errs, h; 411 char **ap; 412 413 errs = 0; 414 for (ap = arglist; *ap != NULL; ap++) { 415 if ((vp2 = lookup(*ap)) == NULL) { 416 if (getenv(*ap)) { 417 unsetenv(*ap); 418 } else if (!sourcing) { 419 printf("\"%s\": undefined variable\n", *ap); 420 errs++; 421 } 422 continue; 423 } 424 h = hash(*ap); 425 if (vp2 == variables[h]) { 426 variables[h] = variables[h]->v_link; 427 v_free(vp2->v_name); 428 v_free(vp2->v_value); 429 free((char *)vp2); 430 continue; 431 } 432 for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link) 433 ; 434 vp->v_link = vp2->v_link; 435 v_free(vp2->v_name); 436 v_free(vp2->v_value); 437 free((char *) vp2); 438 } 439 return(errs); 440 } 441 442 /* 443 * Put add users to a group. 444 */ 445 int 446 group(void *v) 447 { 448 char **argv = v; 449 struct grouphead *gh; 450 struct group *gp; 451 int h; 452 int s; 453 char **ap, *gname, **p; 454 455 if (*argv == NULL) { 456 for (h = 0, s = 1; h < HSHSIZE; h++) 457 for (gh = groups[h]; gh != NULL; gh = gh->g_link) 458 s++; 459 ap = (char **) salloc(s * sizeof *ap); 460 for (h = 0, p = ap; h < HSHSIZE; h++) 461 for (gh = groups[h]; gh != NULL; gh = gh->g_link) 462 *p++ = gh->g_name; 463 *p = NULL; 464 sort(ap); 465 for (p = ap; *p != NULL; p++) 466 printgroup(*p); 467 return(0); 468 } 469 if (argv[1] == NULL) { 470 printgroup(*argv); 471 return(0); 472 } 473 gname = *argv; 474 h = hash(gname); 475 if ((gh = findgroup(gname)) == NULL) { 476 gh = (struct grouphead *) calloc(1, sizeof *gh); 477 gh->g_name = vcopy(gname); 478 gh->g_list = NULL; 479 gh->g_link = groups[h]; 480 groups[h] = gh; 481 } 482 483 /* 484 * Insert names from the command list into the group. 485 * Who cares if there are duplicates? They get tossed 486 * later anyway. 487 */ 488 489 for (ap = argv+1; *ap != NULL; ap++) { 490 gp = (struct group *) calloc(1, sizeof *gp); 491 gp->ge_name = vcopy(*ap); 492 gp->ge_link = gh->g_list; 493 gh->g_list = gp; 494 } 495 return(0); 496 } 497 498 /* 499 * Sort the passed string vecotor into ascending dictionary 500 * order. 501 */ 502 void 503 sort(char **list) 504 { 505 char **ap; 506 507 for (ap = list; *ap != NULL; ap++) 508 ; 509 if (ap-list < 2) 510 return; 511 qsort(list, ap-list, sizeof(*list), diction); 512 } 513 514 /* 515 * Do a dictionary order comparison of the arguments from 516 * qsort. 517 */ 518 static int 519 diction(const void *a, const void *b) 520 { 521 return(strcmp(*(char **)a, *(char **)b)); 522 } 523 524 /* 525 * The do nothing command for comments. 526 */ 527 528 /*ARGSUSED*/ 529 int 530 null(void *v) 531 { 532 return 0; 533 } 534 535 /* 536 * Change to another file. With no argument, print information about 537 * the current file. 538 */ 539 int 540 file(void *v) 541 { 542 char **argv = v; 543 544 if (argv[0] == NULL) { 545 newfileinfo(0); 546 return 0; 547 } 548 if (setfile(*argv) < 0) 549 return 1; 550 announce(); 551 return 0; 552 } 553 554 /* 555 * Expand file names like echo 556 */ 557 int 558 echo(void *v) 559 { 560 char **argv = v; 561 char **ap; 562 char *cp; 563 564 for (ap = argv; *ap != NULL; ap++) { 565 cp = *ap; 566 if ((cp = expand(cp)) != NULL) { 567 if (ap != argv) 568 putchar(' '); 569 printf("%s", cp); 570 } 571 } 572 putchar('\n'); 573 return 0; 574 } 575 576 int 577 Respond(void *v) 578 { 579 int *msgvec = v; 580 if (value("Replyall") == NULL) 581 return (_Respond(msgvec)); 582 else 583 return (_respond(msgvec)); 584 } 585 586 /* 587 * Reply to a series of messages by simply mailing to the senders 588 * and not messing around with the To: and Cc: lists as in normal 589 * reply. 590 */ 591 int 592 _Respond(int msgvec[]) 593 { 594 struct header head; 595 struct message *mp; 596 int *ap; 597 char *cp; 598 599 head.h_to = NULL; 600 for (ap = msgvec; *ap != 0; ap++) { 601 mp = &message[*ap - 1]; 602 touch(mp); 603 dot = mp; 604 if ((cp = skin(hfield("from", mp))) == NULL) 605 cp = skin(nameof(mp, 2)); 606 head.h_to = cat(head.h_to, extract(cp, GTO)); 607 } 608 if (head.h_to == NULL) 609 return 0; 610 mp = &message[msgvec[0] - 1]; 611 if ((head.h_subject = hfield("subject", mp)) == NULL) 612 head.h_subject = hfield("subj", mp); 613 head.h_subject = reedit(head.h_subject); 614 head.h_cc = NULL; 615 head.h_bcc = NULL; 616 head.h_smopts = NULL; 617 mail1(&head, 1); 618 return 0; 619 } 620 621 /* 622 * Conditional commands. These allow one to parameterize one's 623 * .mailrc and do some things if sending, others if receiving. 624 */ 625 int 626 ifcmd(void *v) 627 { 628 char **argv = v; 629 char *cp; 630 631 if (cond != CANY) { 632 printf("Illegal nested \"if\"\n"); 633 return(1); 634 } 635 cond = CANY; 636 cp = argv[0]; 637 switch (*cp) { 638 case 'r': case 'R': 639 cond = CRCV; 640 break; 641 642 case 's': case 'S': 643 cond = CSEND; 644 break; 645 646 default: 647 printf("Unrecognized if-keyword: \"%s\"\n", cp); 648 return(1); 649 } 650 return(0); 651 } 652 653 /* 654 * Implement 'else'. This is pretty simple -- we just 655 * flip over the conditional flag. 656 */ 657 int 658 elsecmd(void *v) 659 { 660 661 switch (cond) { 662 case CANY: 663 printf("\"Else\" without matching \"if\"\n"); 664 return(1); 665 666 case CSEND: 667 cond = CRCV; 668 break; 669 670 case CRCV: 671 cond = CSEND; 672 break; 673 674 default: 675 printf("Mail's idea of conditions is screwed up\n"); 676 cond = CANY; 677 break; 678 } 679 return(0); 680 } 681 682 /* 683 * End of if statement. Just set cond back to anything. 684 */ 685 int 686 endifcmd(void *v) 687 { 688 689 if (cond == CANY) { 690 printf("\"Endif\" without matching \"if\"\n"); 691 return(1); 692 } 693 cond = CANY; 694 return(0); 695 } 696 697 /* 698 * Set the list of alternate names. 699 */ 700 int 701 alternates(void *v) 702 { 703 char **namelist = v; 704 int c; 705 char **ap, **ap2, *cp; 706 707 c = argcount(namelist) + 1; 708 if (c == 1) { 709 if (altnames == 0) 710 return(0); 711 for (ap = altnames; *ap; ap++) 712 printf("%s ", *ap); 713 printf("\n"); 714 return(0); 715 } 716 if (altnames != 0) 717 free((char *) altnames); 718 altnames = (char **) calloc((unsigned) c, sizeof (char *)); 719 for (ap = namelist, ap2 = altnames; *ap; ap++, ap2++) { 720 cp = (char *) calloc((unsigned) strlen(*ap) + 1, sizeof (char)); 721 strcpy(cp, *ap); 722 *ap2 = cp; 723 } 724 *ap2 = 0; 725 return(0); 726 } 727
Indexes created Mon Sep 22 13:09:51 GMT 2025