| 1 | # |
| 2 | |
| 3 | #include "rcv.h" |
| 4 | #include <sys/stat.h> |
| 5 | |
| 6 | /* |
| 7 | * Mail -- a mail program |
| 8 | * |
| 9 | * Still more user commands. |
| 10 | */ |
| 11 | |
| 12 | static char *SccsId = "@(#)cmd3.c 1.3 %G%"; |
| 13 | |
| 14 | /* |
| 15 | * Process a shell escape by saving signals, ignoring signals, |
| 16 | * and forking a sh -c |
| 17 | */ |
| 18 | |
| 19 | shell(str) |
| 20 | char *str; |
| 21 | { |
| 22 | int (*sig[2])(), stat[1]; |
| 23 | register int t; |
| 24 | char *Shell; |
| 25 | char cmd[BUFSIZ]; |
| 26 | |
| 27 | strcpy(cmd, str); |
| 28 | if (bangexp(cmd) < 0) |
| 29 | return(-1); |
| 30 | if ((Shell = value("SHELL")) == NOSTR) |
| 31 | Shell = SHELL; |
| 32 | for (t = 2; t < 4; t++) |
| 33 | sig[t-2] = signal(t, SIG_IGN); |
| 34 | t = vfork(); |
| 35 | if (t == 0) { |
| 36 | for (t = 2; t < 4; t++) |
| 37 | if (sig[t-2] != SIG_IGN) |
| 38 | signal(t, SIG_DFL); |
| 39 | execl(Shell, Shell, "-c", cmd, 0); |
| 40 | perror(Shell); |
| 41 | _exit(1); |
| 42 | } |
| 43 | while (wait(stat) != t) |
| 44 | ; |
| 45 | if (t == -1) |
| 46 | perror("fork"); |
| 47 | for (t = 2; t < 4; t++) |
| 48 | signal(t, sig[t-2]); |
| 49 | printf("!\n"); |
| 50 | return(0); |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Fork an interactive shell. |
| 55 | */ |
| 56 | |
| 57 | dosh(str) |
| 58 | char *str; |
| 59 | { |
| 60 | int (*sig[2])(), stat[1]; |
| 61 | register int t; |
| 62 | char *Shell; |
| 63 | if ((Shell = value("SHELL")) == NOSTR) |
| 64 | Shell = SHELL; |
| 65 | for (t = 2; t < 4; t++) |
| 66 | sig[t-2] = signal(t, SIG_IGN); |
| 67 | t = vfork(); |
| 68 | if (t == 0) { |
| 69 | for (t = 2; t < 4; t++) |
| 70 | if (sig[t-2] != SIG_IGN) |
| 71 | signal(t, SIG_DFL); |
| 72 | execl(Shell, Shell, 0); |
| 73 | perror(Shell); |
| 74 | _exit(1); |
| 75 | } |
| 76 | while (wait(stat) != t) |
| 77 | ; |
| 78 | if (t == -1) |
| 79 | perror("fork"); |
| 80 | for (t = 2; t < 4; t++) |
| 81 | signal(t, sig[t-2]); |
| 82 | putchar('\n'); |
| 83 | return(0); |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Expand the shell escape by expanding unescaped !'s into the |
| 88 | * last issued command where possible. |
| 89 | */ |
| 90 | |
| 91 | char lastbang[128]; |
| 92 | |
| 93 | bangexp(str) |
| 94 | char *str; |
| 95 | { |
| 96 | char bangbuf[BUFSIZ]; |
| 97 | register char *cp, *cp2; |
| 98 | register int n; |
| 99 | int changed = 0; |
| 100 | |
| 101 | cp = str; |
| 102 | cp2 = bangbuf; |
| 103 | n = BUFSIZ; |
| 104 | while (*cp) { |
| 105 | if (*cp == '!') { |
| 106 | if (n < strlen(lastbang)) { |
| 107 | overf: |
| 108 | printf("Command buffer overflow\n"); |
| 109 | return(-1); |
| 110 | } |
| 111 | changed++; |
| 112 | strcpy(cp2, lastbang); |
| 113 | cp2 += strlen(lastbang); |
| 114 | n -= strlen(lastbang); |
| 115 | cp++; |
| 116 | continue; |
| 117 | } |
| 118 | if (*cp == '\\' && cp[1] == '!') { |
| 119 | if (--n <= 1) |
| 120 | goto overf; |
| 121 | *cp2++ = '!'; |
| 122 | cp += 2; |
| 123 | changed++; |
| 124 | } |
| 125 | if (--n <= 1) |
| 126 | goto overf; |
| 127 | *cp2++ = *cp++; |
| 128 | } |
| 129 | *cp2 = 0; |
| 130 | if (changed) { |
| 131 | printf("!%s\n", bangbuf); |
| 132 | fflush(stdout); |
| 133 | } |
| 134 | strcpy(str, bangbuf); |
| 135 | strncpy(lastbang, bangbuf, 128); |
| 136 | lastbang[127] = 0; |
| 137 | return(0); |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * Print out a nice help message from some file or another. |
| 142 | */ |
| 143 | |
| 144 | help() |
| 145 | { |
| 146 | register c; |
| 147 | register FILE *f; |
| 148 | |
| 149 | if ((f = fopen(HELPFILE, "r")) == NULL) { |
| 150 | printf("No help just now.\n"); |
| 151 | return(1); |
| 152 | } |
| 153 | while ((c = getc(f)) != EOF) |
| 154 | putchar(c); |
| 155 | fclose(f); |
| 156 | return(0); |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Change user's working directory. |
| 161 | */ |
| 162 | |
| 163 | schdir(str) |
| 164 | char *str; |
| 165 | { |
| 166 | register char *cp; |
| 167 | |
| 168 | for (cp = str; *cp == ' '; cp++) |
| 169 | ; |
| 170 | if (*cp == '\0') |
| 171 | cp = homedir; |
| 172 | else |
| 173 | if ((cp = expand(cp)) == NOSTR) |
| 174 | return(1); |
| 175 | if (chdir(cp) < 0) { |
| 176 | perror(cp); |
| 177 | return(1); |
| 178 | } |
| 179 | return(0); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Reply to a list of messages. Extract each name from the |
| 184 | * message header and send them off to mail1() |
| 185 | */ |
| 186 | |
| 187 | respond(msgvec) |
| 188 | int *msgvec; |
| 189 | { |
| 190 | struct message *mp; |
| 191 | char *cp, buf[2 * LINESIZE], *rcv; |
| 192 | struct name *np; |
| 193 | struct header head; |
| 194 | char *netmap(); |
| 195 | |
| 196 | if (msgvec[1] != 0) { |
| 197 | printf("Sorry, can't reply to multiple messages at once\n"); |
| 198 | return(1); |
| 199 | } |
| 200 | mp = &message[msgvec[0] - 1]; |
| 201 | dot = mp; |
| 202 | rcv = nameof(mp); |
| 203 | strcpy(buf, ""); |
| 204 | cp = hfield("to", mp); |
| 205 | if (cp != NOSTR) |
| 206 | strcpy(buf, cp); |
| 207 | np = elide(extract(buf, GTO)); |
| 208 | /* rcv = rename(rcv); */ |
| 209 | mapf(np, rcv); |
| 210 | np = delname(np, myname); |
| 211 | head.h_seq = 1; |
| 212 | cp = detract(np, 0); |
| 213 | if (cp != NOSTR) { |
| 214 | strcpy(buf, cp); |
| 215 | strcat(buf, " "); |
| 216 | strcat(buf, rcv); |
| 217 | } |
| 218 | else |
| 219 | strcpy(buf, rcv); |
| 220 | head.h_to = buf; |
| 221 | head.h_subject = hfield("subject", mp); |
| 222 | if (head.h_subject == NOSTR) |
| 223 | head.h_subject = hfield("subj", mp); |
| 224 | head.h_cc = NOSTR; |
| 225 | cp = hfield("cc", mp); |
| 226 | if (cp != NOSTR) { |
| 227 | np = elide(extract(cp, GCC)); |
| 228 | mapf(np, rcv); |
| 229 | np = delname(np, myname); |
| 230 | head.h_cc = detract(np, 0); |
| 231 | } |
| 232 | head.h_bcc = NOSTR; |
| 233 | mail1(&head); |
| 234 | return(0); |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * Preserve the named messages, so that they will be sent |
| 239 | * back to the system mailbox. |
| 240 | */ |
| 241 | |
| 242 | preserve(msgvec) |
| 243 | int *msgvec; |
| 244 | { |
| 245 | register struct message *mp; |
| 246 | register int *ip, mesg; |
| 247 | |
| 248 | if (edit) { |
| 249 | printf("Cannot \"preserve\" in edit mode\n"); |
| 250 | return(1); |
| 251 | } |
| 252 | for (ip = msgvec; *ip != NULL; ip++) { |
| 253 | mesg = *ip; |
| 254 | mp = &message[mesg-1]; |
| 255 | mp->m_flag |= MPRESERVE; |
| 256 | dot = mp; |
| 257 | } |
| 258 | return(0); |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Print the size of each message. |
| 263 | */ |
| 264 | |
| 265 | messize(msgvec) |
| 266 | int *msgvec; |
| 267 | { |
| 268 | register struct message *mp; |
| 269 | register int *ip, mesg; |
| 270 | |
| 271 | for (ip = msgvec; *ip != NULL; ip++) { |
| 272 | mesg = *ip; |
| 273 | mp = &message[mesg-1]; |
| 274 | printf("%d: %d\n", mesg, msize(mp)); |
| 275 | } |
| 276 | return(0); |
| 277 | } |
| 278 | |
| 279 | /* |
| 280 | * Quit quickly. If we are sourcing, just pop the input level |
| 281 | * by returning an error. |
| 282 | */ |
| 283 | |
| 284 | rexit(e) |
| 285 | { |
| 286 | if (sourcing) |
| 287 | return(1); |
| 288 | exit(e); |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * Set or display a variable value. Syntax is similar to that |
| 293 | * of csh. |
| 294 | */ |
| 295 | |
| 296 | set(arglist) |
| 297 | char **arglist; |
| 298 | { |
| 299 | register struct var *vp; |
| 300 | register char *cp, *cp2; |
| 301 | char varbuf[BUFSIZ], **ap, **p; |
| 302 | int errs, h, s; |
| 303 | |
| 304 | if (argcount(arglist) == 0) { |
| 305 | for (h = 0, s = 1; h < HSHSIZE; h++) |
| 306 | for (vp = variables[h]; vp != NOVAR; vp = vp->v_link) |
| 307 | s++; |
| 308 | ap = (char **) salloc(s * sizeof *ap); |
| 309 | for (h = 0, p = ap; h < HSHSIZE; h++) |
| 310 | for (vp = variables[h]; vp != NOVAR; vp = vp->v_link) |
| 311 | *p++ = vp->v_name; |
| 312 | *p = NOSTR; |
| 313 | sort(ap); |
| 314 | for (p = ap; *p != NOSTR; p++) |
| 315 | printf("%s\t%s\n", *p, value(*p)); |
| 316 | return(0); |
| 317 | } |
| 318 | errs = 0; |
| 319 | for (ap = arglist; *ap != NOSTR; ap++) { |
| 320 | cp = *ap; |
| 321 | cp2 = varbuf; |
| 322 | while (*cp != '=' && *cp != '\0') |
| 323 | *cp2++ = *cp++; |
| 324 | *cp2 = '\0'; |
| 325 | if (*cp == '\0') |
| 326 | cp = ""; |
| 327 | else |
| 328 | cp++; |
| 329 | if (equal(varbuf, "")) { |
| 330 | printf("Non-null variable name required\n"); |
| 331 | errs++; |
| 332 | continue; |
| 333 | } |
| 334 | assign(varbuf, cp); |
| 335 | } |
| 336 | return(errs); |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | * Unset a bunch of variable values. |
| 341 | */ |
| 342 | |
| 343 | unset(arglist) |
| 344 | char **arglist; |
| 345 | { |
| 346 | register struct var *vp, *vp2; |
| 347 | register char *cp; |
| 348 | int errs, h; |
| 349 | char **ap; |
| 350 | |
| 351 | errs = 0; |
| 352 | for (ap = arglist; *ap != NOSTR; ap++) { |
| 353 | if ((vp2 = lookup(*ap)) == NOVAR) { |
| 354 | if (!sourcing) { |
| 355 | printf("\"%s\": undefined variable\n", *ap); |
| 356 | errs++; |
| 357 | } |
| 358 | continue; |
| 359 | } |
| 360 | h = hash(*ap); |
| 361 | if (vp2 == variables[h]) { |
| 362 | variables[h] = variables[h]->v_link; |
| 363 | vfree(vp2->v_name); |
| 364 | vfree(vp2->v_value); |
| 365 | cfree(vp2); |
| 366 | continue; |
| 367 | } |
| 368 | for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link) |
| 369 | ; |
| 370 | vp->v_link = vp2->v_link; |
| 371 | vfree(vp2->v_name); |
| 372 | vfree(vp2->v_value); |
| 373 | cfree(vp2); |
| 374 | } |
| 375 | return(errs); |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Put add users to a group. |
| 380 | */ |
| 381 | |
| 382 | group(argv) |
| 383 | char **argv; |
| 384 | { |
| 385 | register struct grouphead *gh; |
| 386 | register struct group *gp; |
| 387 | register int h; |
| 388 | int s; |
| 389 | char **ap, *gname, **p; |
| 390 | |
| 391 | if (argcount(argv) == 0) { |
| 392 | for (h = 0, s = 1; h < HSHSIZE; h++) |
| 393 | for (gh = groups[h]; gh != NOGRP; gh = gh->g_link) |
| 394 | s++; |
| 395 | ap = (char **) salloc(s * sizeof *ap); |
| 396 | for (h = 0, p = ap; h < HSHSIZE; h++) |
| 397 | for (gh = groups[h]; gh != NOGRP; gh = gh->g_link) |
| 398 | *p++ = gh->g_name; |
| 399 | *p = NOSTR; |
| 400 | sort(ap); |
| 401 | for (p = ap; *p != NOSTR; p++) |
| 402 | printgroup(*p); |
| 403 | return(0); |
| 404 | } |
| 405 | if (argcount(argv) == 1) { |
| 406 | printgroup(*argv); |
| 407 | return(0); |
| 408 | } |
| 409 | gname = *argv; |
| 410 | h = hash(gname); |
| 411 | if ((gh = findgroup(gname)) == NOGRP) { |
| 412 | gh = (struct grouphead *) calloc(sizeof *gh, 1); |
| 413 | gh->g_name = vcopy(gname); |
| 414 | gh->g_list = NOGE; |
| 415 | gh->g_link = groups[h]; |
| 416 | groups[h] = gh; |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * Insert names from the command list into the group. |
| 421 | * Who cares if there are duplicates? They get tossed |
| 422 | * later anyway. |
| 423 | */ |
| 424 | |
| 425 | for (ap = argv+1; *ap != NOSTR; ap++) { |
| 426 | gp = (struct group *) calloc(sizeof *gp, 1); |
| 427 | gp->ge_name = vcopy(*ap); |
| 428 | gp->ge_link = gh->g_list; |
| 429 | gh->g_list = gp; |
| 430 | } |
| 431 | return(0); |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Sort the passed string vecotor into ascending dictionary |
| 436 | * order. |
| 437 | */ |
| 438 | |
| 439 | sort(list) |
| 440 | char **list; |
| 441 | { |
| 442 | register char **ap; |
| 443 | int diction(); |
| 444 | |
| 445 | for (ap = list; *ap != NOSTR; ap++) |
| 446 | ; |
| 447 | if (ap-list < 2) |
| 448 | return; |
| 449 | qsort(list, ap-list, sizeof *list, diction); |
| 450 | } |
| 451 | |
| 452 | /* |
| 453 | * Do a dictionary order comparison of the arguments from |
| 454 | * qsort. |
| 455 | */ |
| 456 | |
| 457 | diction(a, b) |
| 458 | register char **a, **b; |
| 459 | { |
| 460 | return(strcmp(*a, *b)); |
| 461 | } |
| 462 | |
| 463 | /* |
| 464 | * The do nothing command for comments. |
| 465 | */ |
| 466 | |
| 467 | null(e) |
| 468 | { |
| 469 | return(0); |
| 470 | } |
| 471 | |
| 472 | /* |
| 473 | * Print out the current edit file, if we are editing. |
| 474 | * Otherwise, print the name of the person who's mail |
| 475 | * we are reading. |
| 476 | */ |
| 477 | |
| 478 | file(argv) |
| 479 | char **argv; |
| 480 | { |
| 481 | register char *cp; |
| 482 | char fname[BUFSIZ]; |
| 483 | |
| 484 | if (argv[0] == NOSTR) { |
| 485 | if (edit) |
| 486 | printf("Reading \"%s\"", editfile); |
| 487 | else |
| 488 | printf("Reading %s's mail", |
| 489 | rindex(mailname, '/') + 1); |
| 490 | printf("; %d message(s)\n", msgCount); |
| 491 | return(0); |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * Acker's! Must switch to the new file. |
| 496 | * We use a funny interpretation -- |
| 497 | * # -- gets the previous file |
| 498 | * % -- gets the invoker's post office box |
| 499 | * %user -- gets someone else's post office box |
| 500 | * string -- reads the given file |
| 501 | */ |
| 502 | |
| 503 | cp = getfilename(argv[0]); |
| 504 | if (cp == NOSTR) |
| 505 | return(-1); |
| 506 | return(setfile(cp, 1)); |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * Evaluate the string given as a new mailbox name. |
| 511 | * Ultimately, we want this to support a number of meta characters. |
| 512 | * Possibly: |
| 513 | * % -- for my system mail box |
| 514 | * %user -- for user's system mail box |
| 515 | * # -- for previous file |
| 516 | * file name -- for any other file |
| 517 | */ |
| 518 | |
| 519 | char * |
| 520 | getfilename(name) |
| 521 | char *name; |
| 522 | { |
| 523 | register char *cp; |
| 524 | |
| 525 | cp = expand(name); |
| 526 | return(cp); |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * Expand file names like echo |
| 531 | */ |
| 532 | |
| 533 | echo(argv) |
| 534 | char **argv; |
| 535 | { |
| 536 | register char **ap; |
| 537 | register char *cp; |
| 538 | |
| 539 | for (ap = argv; *ap != NOSTR; ap++) { |
| 540 | cp = *ap; |
| 541 | if ((cp = expand(cp)) != NOSTR) |
| 542 | printf("%s\n", cp); |
| 543 | } |
| 544 | return(0); |
| 545 | } |
| 546 | |
| 547 | /* |
| 548 | * Reply to a series of messages by simply mailing to the senders |
| 549 | * and not messing around with the To: and Cc: lists as in normal |
| 550 | * reply. |
| 551 | */ |
| 552 | |
| 553 | Respond(msgvec) |
| 554 | int msgvec[]; |
| 555 | { |
| 556 | struct header head; |
| 557 | struct message *mp; |
| 558 | register int s, *ap; |
| 559 | register char *cp, *subject; |
| 560 | |
| 561 | for (s = 0, ap = msgvec; *ap != 0; ap++) { |
| 562 | mp = &message[*ap - 1]; |
| 563 | dot = mp; |
| 564 | s += strlen(nameof(mp)) + 1; |
| 565 | } |
| 566 | if (s == 0) |
| 567 | return(0); |
| 568 | cp = salloc(s + 2); |
| 569 | head.h_to = cp; |
| 570 | for (ap = msgvec; *ap != 0; ap++) { |
| 571 | mp = &message[*ap - 1]; |
| 572 | cp = copy(nameof(mp), cp); |
| 573 | *cp++ = ' '; |
| 574 | } |
| 575 | *--cp = 0; |
| 576 | mp = &message[msgvec[0] - 1]; |
| 577 | subject = hfield("subject", mp); |
| 578 | head.h_seq = 0; |
| 579 | if (subject == NOSTR) |
| 580 | subject = hfield("subj", mp); |
| 581 | head.h_subject = subject; |
| 582 | if (subject != NOSTR) |
| 583 | head.h_seq++; |
| 584 | head.h_cc = NOSTR; |
| 585 | head.h_bcc = NOSTR; |
| 586 | mail1(&head); |
| 587 | return(0); |
| 588 | } |