| 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 | #ifndef lint |
| 8 | static char *sccsid = "@(#)func.c 5.3 (Berkeley) %G%"; |
| 9 | #endif |
| 10 | |
| 11 | #include "sh.h" |
| 12 | #include <sys/ioctl.h> |
| 13 | |
| 14 | /* |
| 15 | * C shell |
| 16 | */ |
| 17 | |
| 18 | struct biltins * |
| 19 | isbfunc(t) |
| 20 | struct command *t; |
| 21 | { |
| 22 | register char *cp = t->t_dcom[0]; |
| 23 | register struct biltins *bp, *bp1, *bp2; |
| 24 | int dolabel(), dofg1(), dobg1(); |
| 25 | static struct biltins label = { "", dolabel, 0, 0 }; |
| 26 | static struct biltins foregnd = { "%job", dofg1, 0, 0 }; |
| 27 | static struct biltins backgnd = { "%job &", dobg1, 0, 0 }; |
| 28 | |
| 29 | if (lastchr(cp) == ':') { |
| 30 | label.bname = cp; |
| 31 | return (&label); |
| 32 | } |
| 33 | if (*cp == '%') { |
| 34 | if (t->t_dflg & FAND) { |
| 35 | t->t_dflg &= ~FAND; |
| 36 | backgnd.bname = cp; |
| 37 | return (&backgnd); |
| 38 | } |
| 39 | foregnd.bname = cp; |
| 40 | return (&foregnd); |
| 41 | } |
| 42 | /* |
| 43 | * Binary search |
| 44 | * Bp1 is the beginning of the current search range. |
| 45 | * Bp2 is one past the end. |
| 46 | */ |
| 47 | for (bp1 = bfunc, bp2 = bfunc + nbfunc; bp1 < bp2;) { |
| 48 | register i; |
| 49 | |
| 50 | bp = bp1 + (bp2 - bp1 >> 1); |
| 51 | if ((i = *cp - *bp->bname) == 0 && |
| 52 | (i = strcmp(cp, bp->bname)) == 0) |
| 53 | return bp; |
| 54 | if (i < 0) |
| 55 | bp2 = bp; |
| 56 | else |
| 57 | bp1 = bp + 1; |
| 58 | } |
| 59 | return (0); |
| 60 | } |
| 61 | |
| 62 | func(t, bp) |
| 63 | register struct command *t; |
| 64 | register struct biltins *bp; |
| 65 | { |
| 66 | int i; |
| 67 | |
| 68 | xechoit(t->t_dcom); |
| 69 | setname(bp->bname); |
| 70 | i = blklen(t->t_dcom) - 1; |
| 71 | if (i < bp->minargs) |
| 72 | bferr("Too few arguments"); |
| 73 | if (i > bp->maxargs) |
| 74 | bferr("Too many arguments"); |
| 75 | (*bp->bfunct)(t->t_dcom, t); |
| 76 | } |
| 77 | |
| 78 | dolabel() |
| 79 | { |
| 80 | |
| 81 | } |
| 82 | |
| 83 | doonintr(v) |
| 84 | char **v; |
| 85 | { |
| 86 | register char *cp; |
| 87 | register char *vv = v[1]; |
| 88 | |
| 89 | if (parintr == SIG_IGN) |
| 90 | return; |
| 91 | if (setintr && intty) |
| 92 | bferr("Can't from terminal"); |
| 93 | cp = gointr, gointr = 0, xfree(cp); |
| 94 | if (vv == 0) { |
| 95 | if (setintr) |
| 96 | (void) sigblock(sigmask(SIGINT)); |
| 97 | else |
| 98 | (void) signal(SIGINT, SIG_DFL); |
| 99 | gointr = 0; |
| 100 | } else if (eq((vv = strip(vv)), "-")) { |
| 101 | (void) signal(SIGINT, SIG_IGN); |
| 102 | gointr = "-"; |
| 103 | } else { |
| 104 | gointr = savestr(vv); |
| 105 | (void) signal(SIGINT, pintr); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | donohup() |
| 110 | { |
| 111 | |
| 112 | if (intty) |
| 113 | bferr("Can't from terminal"); |
| 114 | if (setintr == 0) { |
| 115 | (void) signal(SIGHUP, SIG_IGN); |
| 116 | #ifdef CC |
| 117 | submit(getpid()); |
| 118 | #endif |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | dozip() |
| 123 | { |
| 124 | |
| 125 | ; |
| 126 | } |
| 127 | |
| 128 | prvars() |
| 129 | { |
| 130 | |
| 131 | plist(&shvhed); |
| 132 | } |
| 133 | |
| 134 | doalias(v) |
| 135 | register char **v; |
| 136 | { |
| 137 | register struct varent *vp; |
| 138 | register char *p; |
| 139 | |
| 140 | v++; |
| 141 | p = *v++; |
| 142 | if (p == 0) |
| 143 | plist(&aliases); |
| 144 | else if (*v == 0) { |
| 145 | vp = adrof1(strip(p), &aliases); |
| 146 | if (vp) |
| 147 | blkpr(vp->vec), printf("\n"); |
| 148 | } else { |
| 149 | if (eq(p, "alias") || eq(p, "unalias")) { |
| 150 | setname(p); |
| 151 | bferr("Too dangerous to alias that"); |
| 152 | } |
| 153 | set1(strip(p), saveblk(v), &aliases); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | unalias(v) |
| 158 | char **v; |
| 159 | { |
| 160 | |
| 161 | unset1(v, &aliases); |
| 162 | } |
| 163 | |
| 164 | dologout() |
| 165 | { |
| 166 | |
| 167 | islogin(); |
| 168 | goodbye(); |
| 169 | } |
| 170 | |
| 171 | dologin(v) |
| 172 | char **v; |
| 173 | { |
| 174 | |
| 175 | islogin(); |
| 176 | rechist(); |
| 177 | (void) signal(SIGTERM, parterm); |
| 178 | execl("/bin/login", "login", v[1], 0); |
| 179 | untty(); |
| 180 | exit(1); |
| 181 | } |
| 182 | |
| 183 | #ifdef NEWGRP |
| 184 | donewgrp(v) |
| 185 | char **v; |
| 186 | { |
| 187 | |
| 188 | if (chkstop == 0 && setintr) |
| 189 | panystop(0); |
| 190 | (void) signal(SIGTERM, parterm); |
| 191 | execl("/bin/newgrp", "newgrp", v[1], 0); |
| 192 | execl("/usr/bin/newgrp", "newgrp", v[1], 0); |
| 193 | untty(); |
| 194 | exit(1); |
| 195 | } |
| 196 | #endif |
| 197 | |
| 198 | islogin() |
| 199 | { |
| 200 | |
| 201 | if (chkstop == 0 && setintr) |
| 202 | panystop(0); |
| 203 | if (loginsh) |
| 204 | return; |
| 205 | error("Not login shell"); |
| 206 | } |
| 207 | |
| 208 | doif(v, kp) |
| 209 | char **v; |
| 210 | struct command *kp; |
| 211 | { |
| 212 | register int i; |
| 213 | register char **vv; |
| 214 | |
| 215 | v++; |
| 216 | i = exp(&v); |
| 217 | vv = v; |
| 218 | if (*vv == NOSTR) |
| 219 | bferr("Empty if"); |
| 220 | if (eq(*vv, "then")) { |
| 221 | if (*++vv) |
| 222 | bferr("Improper then"); |
| 223 | setname("then"); |
| 224 | /* |
| 225 | * If expression was zero, then scan to else, |
| 226 | * otherwise just fall into following code. |
| 227 | */ |
| 228 | if (!i) |
| 229 | search(ZIF, 0); |
| 230 | return; |
| 231 | } |
| 232 | /* |
| 233 | * Simple command attached to this if. |
| 234 | * Left shift the node in this tree, munging it |
| 235 | * so we can reexecute it. |
| 236 | */ |
| 237 | if (i) { |
| 238 | lshift(kp->t_dcom, vv - kp->t_dcom); |
| 239 | reexecute(kp); |
| 240 | donefds(); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Reexecute a command, being careful not |
| 246 | * to redo i/o redirection, which is already set up. |
| 247 | */ |
| 248 | reexecute(kp) |
| 249 | register struct command *kp; |
| 250 | { |
| 251 | |
| 252 | kp->t_dflg &= FSAVE; |
| 253 | kp->t_dflg |= FREDO; |
| 254 | /* |
| 255 | * If tty is still ours to arbitrate, arbitrate it; |
| 256 | * otherwise dont even set pgrp's as the jobs would |
| 257 | * then have no way to get the tty (we can't give it |
| 258 | * to them, and our parent wouldn't know their pgrp, etc. |
| 259 | */ |
| 260 | execute(kp, tpgrp > 0 ? tpgrp : -1); |
| 261 | } |
| 262 | |
| 263 | doelse() |
| 264 | { |
| 265 | |
| 266 | search(ZELSE, 0); |
| 267 | } |
| 268 | |
| 269 | dogoto(v) |
| 270 | char **v; |
| 271 | { |
| 272 | register struct whyle *wp; |
| 273 | char *lp; |
| 274 | |
| 275 | /* |
| 276 | * While we still can, locate any unknown ends of existing loops. |
| 277 | * This obscure code is the WORST result of the fact that we |
| 278 | * don't really parse. |
| 279 | */ |
| 280 | for (wp = whyles; wp; wp = wp->w_next) |
| 281 | if (wp->w_end == 0) { |
| 282 | search(ZBREAK, 0); |
| 283 | wp->w_end = btell(); |
| 284 | } else |
| 285 | bseek(wp->w_end); |
| 286 | search(ZGOTO, 0, lp = globone(v[1])); |
| 287 | xfree(lp); |
| 288 | /* |
| 289 | * Eliminate loops which were exited. |
| 290 | */ |
| 291 | wfree(); |
| 292 | } |
| 293 | |
| 294 | doswitch(v) |
| 295 | register char **v; |
| 296 | { |
| 297 | register char *cp, *lp; |
| 298 | |
| 299 | v++; |
| 300 | if (!*v || *(*v++) != '(') |
| 301 | goto syntax; |
| 302 | cp = **v == ')' ? "" : *v++; |
| 303 | if (*(*v++) != ')') |
| 304 | v--; |
| 305 | if (*v) |
| 306 | syntax: |
| 307 | error("Syntax error"); |
| 308 | search(ZSWITCH, 0, lp = globone(cp)); |
| 309 | xfree(lp); |
| 310 | } |
| 311 | |
| 312 | dobreak() |
| 313 | { |
| 314 | |
| 315 | if (whyles) |
| 316 | toend(); |
| 317 | else |
| 318 | bferr("Not in while/foreach"); |
| 319 | } |
| 320 | |
| 321 | doexit(v) |
| 322 | char **v; |
| 323 | { |
| 324 | |
| 325 | if (chkstop == 0) |
| 326 | panystop(0); |
| 327 | /* |
| 328 | * Don't DEMAND parentheses here either. |
| 329 | */ |
| 330 | v++; |
| 331 | if (*v) { |
| 332 | set("status", putn(exp(&v))); |
| 333 | if (*v) |
| 334 | bferr("Expression syntax"); |
| 335 | } |
| 336 | btoeof(); |
| 337 | if (intty) |
| 338 | (void) close(SHIN); |
| 339 | } |
| 340 | |
| 341 | doforeach(v) |
| 342 | register char **v; |
| 343 | { |
| 344 | register char *cp; |
| 345 | register struct whyle *nwp; |
| 346 | |
| 347 | v++; |
| 348 | cp = strip(*v); |
| 349 | while (*cp && letter(*cp)) |
| 350 | cp++; |
| 351 | if (*cp || strlen(*v) >= 20) |
| 352 | bferr("Invalid variable"); |
| 353 | cp = *v++; |
| 354 | if (v[0][0] != '(' || v[blklen(v) - 1][0] != ')') |
| 355 | bferr("Words not ()'ed"); |
| 356 | v++; |
| 357 | gflag = 0, tglob(v); |
| 358 | v = glob(v); |
| 359 | if (v == 0) |
| 360 | bferr("No match"); |
| 361 | nwp = (struct whyle *) calloc(1, sizeof *nwp); |
| 362 | nwp->w_fe = nwp->w_fe0 = v; gargv = 0; |
| 363 | nwp->w_start = btell(); |
| 364 | nwp->w_fename = savestr(cp); |
| 365 | nwp->w_next = whyles; |
| 366 | whyles = nwp; |
| 367 | /* |
| 368 | * Pre-read the loop so as to be more |
| 369 | * comprehensible to a terminal user. |
| 370 | */ |
| 371 | if (intty) |
| 372 | preread(); |
| 373 | doagain(); |
| 374 | } |
| 375 | |
| 376 | dowhile(v) |
| 377 | char **v; |
| 378 | { |
| 379 | register int status; |
| 380 | register bool again = whyles != 0 && whyles->w_start == lineloc && |
| 381 | whyles->w_fename == 0; |
| 382 | |
| 383 | v++; |
| 384 | /* |
| 385 | * Implement prereading here also, taking care not to |
| 386 | * evaluate the expression before the loop has been read up |
| 387 | * from a terminal. |
| 388 | */ |
| 389 | if (intty && !again) |
| 390 | status = !exp0(&v, 1); |
| 391 | else |
| 392 | status = !exp(&v); |
| 393 | if (*v) |
| 394 | bferr("Expression syntax"); |
| 395 | if (!again) { |
| 396 | register struct whyle *nwp = (struct whyle *) calloc(1, sizeof (*nwp)); |
| 397 | |
| 398 | nwp->w_start = lineloc; |
| 399 | nwp->w_end = 0; |
| 400 | nwp->w_next = whyles; |
| 401 | whyles = nwp; |
| 402 | if (intty) { |
| 403 | /* |
| 404 | * The tty preread |
| 405 | */ |
| 406 | preread(); |
| 407 | doagain(); |
| 408 | return; |
| 409 | } |
| 410 | } |
| 411 | if (status) |
| 412 | /* We ain't gonna loop no more, no more! */ |
| 413 | toend(); |
| 414 | } |
| 415 | |
| 416 | preread() |
| 417 | { |
| 418 | |
| 419 | whyles->w_end = -1; |
| 420 | if (setintr) |
| 421 | (void) sigsetmask(sigblock(0) & ~sigmask(SIGINT)); |
| 422 | search(ZBREAK, 0); |
| 423 | if (setintr) |
| 424 | (void) sigblock(sigmask(SIGINT)); |
| 425 | whyles->w_end = btell(); |
| 426 | } |
| 427 | |
| 428 | doend() |
| 429 | { |
| 430 | |
| 431 | if (!whyles) |
| 432 | bferr("Not in while/foreach"); |
| 433 | whyles->w_end = btell(); |
| 434 | doagain(); |
| 435 | } |
| 436 | |
| 437 | docontin() |
| 438 | { |
| 439 | |
| 440 | if (!whyles) |
| 441 | bferr("Not in while/foreach"); |
| 442 | doagain(); |
| 443 | } |
| 444 | |
| 445 | doagain() |
| 446 | { |
| 447 | |
| 448 | /* Repeating a while is simple */ |
| 449 | if (whyles->w_fename == 0) { |
| 450 | bseek(whyles->w_start); |
| 451 | return; |
| 452 | } |
| 453 | /* |
| 454 | * The foreach variable list actually has a spurious word |
| 455 | * ")" at the end of the w_fe list. Thus we are at the |
| 456 | * of the list if one word beyond this is 0. |
| 457 | */ |
| 458 | if (!whyles->w_fe[1]) { |
| 459 | dobreak(); |
| 460 | return; |
| 461 | } |
| 462 | set(whyles->w_fename, savestr(*whyles->w_fe++)); |
| 463 | bseek(whyles->w_start); |
| 464 | } |
| 465 | |
| 466 | dorepeat(v, kp) |
| 467 | char **v; |
| 468 | struct command *kp; |
| 469 | { |
| 470 | register int i, omask; |
| 471 | |
| 472 | i = getn(v[1]); |
| 473 | if (setintr) |
| 474 | omask = sigblock(sigmask(SIGINT)) & ~sigmask(SIGINT); |
| 475 | lshift(v, 2); |
| 476 | while (i > 0) { |
| 477 | if (setintr) |
| 478 | (void) sigsetmask(omask); |
| 479 | reexecute(kp); |
| 480 | --i; |
| 481 | } |
| 482 | donefds(); |
| 483 | if (setintr) |
| 484 | (void) sigsetmask(omask); |
| 485 | } |
| 486 | |
| 487 | doswbrk() |
| 488 | { |
| 489 | |
| 490 | search(ZBRKSW, 0); |
| 491 | } |
| 492 | |
| 493 | srchx(cp) |
| 494 | register char *cp; |
| 495 | { |
| 496 | register struct srch *sp, *sp1, *sp2; |
| 497 | register i; |
| 498 | |
| 499 | /* |
| 500 | * Binary search |
| 501 | * Sp1 is the beginning of the current search range. |
| 502 | * Sp2 is one past the end. |
| 503 | */ |
| 504 | for (sp1 = srchn, sp2 = srchn + nsrchn; sp1 < sp2;) { |
| 505 | sp = sp1 + (sp2 - sp1 >> 1); |
| 506 | if ((i = *cp - *sp->s_name) == 0 && |
| 507 | (i = strcmp(cp, sp->s_name)) == 0) |
| 508 | return sp->s_value; |
| 509 | if (i < 0) |
| 510 | sp2 = sp; |
| 511 | else |
| 512 | sp1 = sp + 1; |
| 513 | } |
| 514 | return (-1); |
| 515 | } |
| 516 | |
| 517 | char Stype; |
| 518 | char *Sgoal; |
| 519 | |
| 520 | /*VARARGS2*/ |
| 521 | search(type, level, goal) |
| 522 | int type; |
| 523 | register int level; |
| 524 | char *goal; |
| 525 | { |
| 526 | char wordbuf[BUFSIZ]; |
| 527 | register char *aword = wordbuf; |
| 528 | register char *cp; |
| 529 | |
| 530 | Stype = type; Sgoal = goal; |
| 531 | if (type == ZGOTO) |
| 532 | bseek((off_t)0); |
| 533 | do { |
| 534 | if (intty && fseekp == feobp) |
| 535 | printf("? "), flush(); |
| 536 | aword[0] = 0; |
| 537 | (void) getword(aword); |
| 538 | switch (srchx(aword)) { |
| 539 | |
| 540 | case ZELSE: |
| 541 | if (level == 0 && type == ZIF) |
| 542 | return; |
| 543 | break; |
| 544 | |
| 545 | case ZIF: |
| 546 | while (getword(aword)) |
| 547 | continue; |
| 548 | if ((type == ZIF || type == ZELSE) && eq(aword, "then")) |
| 549 | level++; |
| 550 | break; |
| 551 | |
| 552 | case ZENDIF: |
| 553 | if (type == ZIF || type == ZELSE) |
| 554 | level--; |
| 555 | break; |
| 556 | |
| 557 | case ZFOREACH: |
| 558 | case ZWHILE: |
| 559 | if (type == ZBREAK) |
| 560 | level++; |
| 561 | break; |
| 562 | |
| 563 | case ZEND: |
| 564 | if (type == ZBREAK) |
| 565 | level--; |
| 566 | break; |
| 567 | |
| 568 | case ZSWITCH: |
| 569 | if (type == ZSWITCH || type == ZBRKSW) |
| 570 | level++; |
| 571 | break; |
| 572 | |
| 573 | case ZENDSW: |
| 574 | if (type == ZSWITCH || type == ZBRKSW) |
| 575 | level--; |
| 576 | break; |
| 577 | |
| 578 | case ZLABEL: |
| 579 | if (type == ZGOTO && getword(aword) && eq(aword, goal)) |
| 580 | level = -1; |
| 581 | break; |
| 582 | |
| 583 | default: |
| 584 | if (type != ZGOTO && (type != ZSWITCH || level != 0)) |
| 585 | break; |
| 586 | if (lastchr(aword) != ':') |
| 587 | break; |
| 588 | aword[strlen(aword) - 1] = 0; |
| 589 | if (type == ZGOTO && eq(aword, goal) || type == ZSWITCH && eq(aword, "default")) |
| 590 | level = -1; |
| 591 | break; |
| 592 | |
| 593 | case ZCASE: |
| 594 | if (type != ZSWITCH || level != 0) |
| 595 | break; |
| 596 | (void) getword(aword); |
| 597 | if (lastchr(aword) == ':') |
| 598 | aword[strlen(aword) - 1] = 0; |
| 599 | cp = strip(Dfix1(aword)); |
| 600 | if (Gmatch(goal, cp)) |
| 601 | level = -1; |
| 602 | xfree(cp); |
| 603 | break; |
| 604 | |
| 605 | case ZDEFAULT: |
| 606 | if (type == ZSWITCH && level == 0) |
| 607 | level = -1; |
| 608 | break; |
| 609 | } |
| 610 | (void) getword(NOSTR); |
| 611 | } while (level >= 0); |
| 612 | } |
| 613 | |
| 614 | getword(wp) |
| 615 | register char *wp; |
| 616 | { |
| 617 | register int found = 0; |
| 618 | register int c, d; |
| 619 | |
| 620 | c = readc(1); |
| 621 | d = 0; |
| 622 | do { |
| 623 | while (c == ' ' || c == '\t') |
| 624 | c = readc(1); |
| 625 | if (c == '#') |
| 626 | do |
| 627 | c = readc(1); |
| 628 | while (c >= 0 && c != '\n'); |
| 629 | if (c < 0) |
| 630 | goto past; |
| 631 | if (c == '\n') { |
| 632 | if (wp) |
| 633 | break; |
| 634 | return (0); |
| 635 | } |
| 636 | unreadc(c); |
| 637 | found = 1; |
| 638 | do { |
| 639 | c = readc(1); |
| 640 | if (c == '\\' && (c = readc(1)) == '\n') |
| 641 | c = ' '; |
| 642 | if (c == '\'' || c == '"') |
| 643 | if (d == 0) |
| 644 | d = c; |
| 645 | else if (d == c) |
| 646 | d = 0; |
| 647 | if (c < 0) |
| 648 | goto past; |
| 649 | if (wp) |
| 650 | *wp++ = c; |
| 651 | } while ((d || c != ' ' && c != '\t') && c != '\n'); |
| 652 | } while (wp == 0); |
| 653 | unreadc(c); |
| 654 | if (found) |
| 655 | *--wp = 0; |
| 656 | return (found); |
| 657 | |
| 658 | past: |
| 659 | switch (Stype) { |
| 660 | |
| 661 | case ZIF: |
| 662 | bferr("then/endif not found"); |
| 663 | |
| 664 | case ZELSE: |
| 665 | bferr("endif not found"); |
| 666 | |
| 667 | case ZBRKSW: |
| 668 | case ZSWITCH: |
| 669 | bferr("endsw not found"); |
| 670 | |
| 671 | case ZBREAK: |
| 672 | bferr("end not found"); |
| 673 | |
| 674 | case ZGOTO: |
| 675 | setname(Sgoal); |
| 676 | bferr("label not found"); |
| 677 | } |
| 678 | /*NOTREACHED*/ |
| 679 | } |
| 680 | |
| 681 | toend() |
| 682 | { |
| 683 | |
| 684 | if (whyles->w_end == 0) { |
| 685 | search(ZBREAK, 0); |
| 686 | whyles->w_end = btell() - 1; |
| 687 | } else |
| 688 | bseek(whyles->w_end); |
| 689 | wfree(); |
| 690 | } |
| 691 | |
| 692 | wfree() |
| 693 | { |
| 694 | long o = btell(); |
| 695 | |
| 696 | while (whyles) { |
| 697 | register struct whyle *wp = whyles; |
| 698 | register struct whyle *nwp = wp->w_next; |
| 699 | |
| 700 | if (o >= wp->w_start && (wp->w_end == 0 || o < wp->w_end)) |
| 701 | break; |
| 702 | if (wp->w_fe0) |
| 703 | blkfree(wp->w_fe0); |
| 704 | if (wp->w_fename) |
| 705 | xfree(wp->w_fename); |
| 706 | xfree((char *)wp); |
| 707 | whyles = nwp; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | doecho(v) |
| 712 | char **v; |
| 713 | { |
| 714 | |
| 715 | echo(' ', v); |
| 716 | } |
| 717 | |
| 718 | doglob(v) |
| 719 | char **v; |
| 720 | { |
| 721 | |
| 722 | echo(0, v); |
| 723 | flush(); |
| 724 | } |
| 725 | |
| 726 | echo(sep, v) |
| 727 | char sep; |
| 728 | register char **v; |
| 729 | { |
| 730 | register char *cp; |
| 731 | int nonl = 0; |
| 732 | |
| 733 | if (setintr) |
| 734 | (void) sigsetmask(sigblock(0) & ~sigmask(SIGINT)); |
| 735 | v++; |
| 736 | if (*v == 0) |
| 737 | return; |
| 738 | gflag = 0, tglob(v); |
| 739 | if (gflag) { |
| 740 | v = glob(v); |
| 741 | if (v == 0) |
| 742 | bferr("No match"); |
| 743 | } else |
| 744 | trim(v); |
| 745 | if (sep == ' ' && *v && !strcmp(*v, "-n")) |
| 746 | nonl++, v++; |
| 747 | while (cp = *v++) { |
| 748 | register int c; |
| 749 | |
| 750 | while (c = *cp++) |
| 751 | putchar(c | QUOTE); |
| 752 | if (*v) |
| 753 | putchar(sep | QUOTE); |
| 754 | } |
| 755 | if (sep && nonl == 0) |
| 756 | putchar('\n'); |
| 757 | else |
| 758 | flush(); |
| 759 | if (setintr) |
| 760 | (void) sigblock(sigmask(SIGINT)); |
| 761 | if (gargv) |
| 762 | blkfree(gargv), gargv = 0; |
| 763 | } |
| 764 | |
| 765 | char **environ; |
| 766 | |
| 767 | dosetenv(v) |
| 768 | register char **v; |
| 769 | { |
| 770 | char *vp, *lp; |
| 771 | |
| 772 | v++; |
| 773 | if ((vp = *v++) == 0) { |
| 774 | register char **ep; |
| 775 | |
| 776 | if (setintr) |
| 777 | (void) sigsetmask(sigblock(0) & ~ sigmask(SIGINT)); |
| 778 | for (ep = environ; *ep; ep++) |
| 779 | printf("%s\n", *ep); |
| 780 | return; |
| 781 | } |
| 782 | if ((lp = *v++) == 0) |
| 783 | lp = ""; |
| 784 | setenv(vp, lp = globone(lp)); |
| 785 | if (eq(vp, "PATH")) { |
| 786 | importpath(lp); |
| 787 | dohash(); |
| 788 | } |
| 789 | xfree(lp); |
| 790 | } |
| 791 | |
| 792 | dounsetenv(v) |
| 793 | register char **v; |
| 794 | { |
| 795 | |
| 796 | v++; |
| 797 | do |
| 798 | unsetenv(*v++); |
| 799 | while (*v); |
| 800 | } |
| 801 | |
| 802 | setenv(name, val) |
| 803 | char *name, *val; |
| 804 | { |
| 805 | register char **ep = environ; |
| 806 | register char *cp, *dp; |
| 807 | char *blk[2], **oep = ep; |
| 808 | |
| 809 | for (; *ep; ep++) { |
| 810 | for (cp = name, dp = *ep; *cp && *cp == *dp; cp++, dp++) |
| 811 | continue; |
| 812 | if (*cp != 0 || *dp != '=') |
| 813 | continue; |
| 814 | cp = strspl("=", val); |
| 815 | xfree(*ep); |
| 816 | *ep = strspl(name, cp); |
| 817 | xfree(cp); |
| 818 | trim(ep); |
| 819 | return; |
| 820 | } |
| 821 | blk[0] = strspl(name, "="); blk[1] = 0; |
| 822 | environ = blkspl(environ, blk); |
| 823 | xfree((char *)oep); |
| 824 | setenv(name, val); |
| 825 | } |
| 826 | |
| 827 | unsetenv(name) |
| 828 | char *name; |
| 829 | { |
| 830 | register char **ep = environ; |
| 831 | register char *cp, *dp; |
| 832 | char **oep = ep; |
| 833 | |
| 834 | for (; *ep; ep++) { |
| 835 | for (cp = name, dp = *ep; *cp && *cp == *dp; cp++, dp++) |
| 836 | continue; |
| 837 | if (*cp != 0 || *dp != '=') |
| 838 | continue; |
| 839 | cp = *ep; |
| 840 | *ep = 0; |
| 841 | environ = blkspl(environ, ep+1); |
| 842 | *ep = cp; |
| 843 | xfree(cp); |
| 844 | xfree((char *)oep); |
| 845 | return; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | doumask(v) |
| 850 | register char **v; |
| 851 | { |
| 852 | register char *cp = v[1]; |
| 853 | register int i; |
| 854 | |
| 855 | if (cp == 0) { |
| 856 | i = umask(0); |
| 857 | (void) umask(i); |
| 858 | printf("%o\n", i); |
| 859 | return; |
| 860 | } |
| 861 | i = 0; |
| 862 | while (digit(*cp) && *cp != '8' && *cp != '9') |
| 863 | i = i * 8 + *cp++ - '0'; |
| 864 | if (*cp || i < 0 || i > 0777) |
| 865 | bferr("Improper mask"); |
| 866 | (void) umask(i); |
| 867 | } |
| 868 | |
| 869 | |
| 870 | struct limits { |
| 871 | int limconst; |
| 872 | char *limname; |
| 873 | int limdiv; |
| 874 | char *limscale; |
| 875 | } limits[] = { |
| 876 | RLIMIT_CPU, "cputime", 1, "seconds", |
| 877 | RLIMIT_FSIZE, "filesize", 1024, "kbytes", |
| 878 | RLIMIT_DATA, "datasize", 1024, "kbytes", |
| 879 | RLIMIT_STACK, "stacksize", 1024, "kbytes", |
| 880 | RLIMIT_CORE, "coredumpsize", 1024, "kbytes", |
| 881 | RLIMIT_RSS, "memoryuse", 1024, "kbytes", |
| 882 | -1, 0, |
| 883 | }; |
| 884 | |
| 885 | struct limits * |
| 886 | findlim(cp) |
| 887 | char *cp; |
| 888 | { |
| 889 | register struct limits *lp, *res; |
| 890 | |
| 891 | res = 0; |
| 892 | for (lp = limits; lp->limconst >= 0; lp++) |
| 893 | if (prefix(cp, lp->limname)) { |
| 894 | if (res) |
| 895 | bferr("Ambiguous"); |
| 896 | res = lp; |
| 897 | } |
| 898 | if (res) |
| 899 | return (res); |
| 900 | bferr("No such limit"); |
| 901 | /*NOTREACHED*/ |
| 902 | } |
| 903 | |
| 904 | dolimit(v) |
| 905 | register char **v; |
| 906 | { |
| 907 | register struct limits *lp; |
| 908 | register int limit; |
| 909 | char hard = 0; |
| 910 | |
| 911 | v++; |
| 912 | if (*v && eq(*v, "-h")) { |
| 913 | hard = 1; |
| 914 | v++; |
| 915 | } |
| 916 | if (*v == 0) { |
| 917 | for (lp = limits; lp->limconst >= 0; lp++) |
| 918 | plim(lp, hard); |
| 919 | return; |
| 920 | } |
| 921 | lp = findlim(v[0]); |
| 922 | if (v[1] == 0) { |
| 923 | plim(lp, hard); |
| 924 | return; |
| 925 | } |
| 926 | limit = getval(lp, v+1); |
| 927 | if (setlim(lp, hard, limit) < 0) |
| 928 | error(NOSTR); |
| 929 | } |
| 930 | |
| 931 | getval(lp, v) |
| 932 | register struct limits *lp; |
| 933 | char **v; |
| 934 | { |
| 935 | register float f; |
| 936 | double atof(); |
| 937 | char *cp = *v++; |
| 938 | |
| 939 | f = atof(cp); |
| 940 | while (digit(*cp) || *cp == '.' || *cp == 'e' || *cp == 'E') |
| 941 | cp++; |
| 942 | if (*cp == 0) { |
| 943 | if (*v == 0) |
| 944 | return ((int)(f+0.5) * lp->limdiv); |
| 945 | cp = *v; |
| 946 | } |
| 947 | switch (*cp) { |
| 948 | |
| 949 | case ':': |
| 950 | if (lp->limconst != RLIMIT_CPU) |
| 951 | goto badscal; |
| 952 | return ((int)(f * 60.0 + atof(cp+1))); |
| 953 | |
| 954 | case 'h': |
| 955 | if (lp->limconst != RLIMIT_CPU) |
| 956 | goto badscal; |
| 957 | limtail(cp, "hours"); |
| 958 | f *= 3600.; |
| 959 | break; |
| 960 | |
| 961 | case 'm': |
| 962 | if (lp->limconst == RLIMIT_CPU) { |
| 963 | limtail(cp, "minutes"); |
| 964 | f *= 60.; |
| 965 | break; |
| 966 | } |
| 967 | case 'M': |
| 968 | if (lp->limconst == RLIMIT_CPU) |
| 969 | goto badscal; |
| 970 | *cp = 'm'; |
| 971 | limtail(cp, "megabytes"); |
| 972 | f *= 1024.*1024.; |
| 973 | break; |
| 974 | |
| 975 | case 's': |
| 976 | if (lp->limconst != RLIMIT_CPU) |
| 977 | goto badscal; |
| 978 | limtail(cp, "seconds"); |
| 979 | break; |
| 980 | |
| 981 | case 'k': |
| 982 | if (lp->limconst == RLIMIT_CPU) |
| 983 | goto badscal; |
| 984 | limtail(cp, "kbytes"); |
| 985 | f *= 1024; |
| 986 | break; |
| 987 | |
| 988 | case 'u': |
| 989 | limtail(cp, "unlimited"); |
| 990 | return (RLIM_INFINITY); |
| 991 | |
| 992 | default: |
| 993 | badscal: |
| 994 | bferr("Improper or unknown scale factor"); |
| 995 | } |
| 996 | return ((int)(f+0.5)); |
| 997 | } |
| 998 | |
| 999 | limtail(cp, str0) |
| 1000 | char *cp, *str0; |
| 1001 | { |
| 1002 | register char *str = str0; |
| 1003 | |
| 1004 | while (*cp && *cp == *str) |
| 1005 | cp++, str++; |
| 1006 | if (*cp) |
| 1007 | error("Bad scaling; did you mean ``%s''?", str0); |
| 1008 | } |
| 1009 | |
| 1010 | plim(lp, hard) |
| 1011 | register struct limits *lp; |
| 1012 | char hard; |
| 1013 | { |
| 1014 | struct rlimit rlim; |
| 1015 | int limit; |
| 1016 | |
| 1017 | printf("%s \t", lp->limname); |
| 1018 | (void) getrlimit(lp->limconst, &rlim); |
| 1019 | limit = hard ? rlim.rlim_max : rlim.rlim_cur; |
| 1020 | if (limit == RLIM_INFINITY) |
| 1021 | printf("unlimited"); |
| 1022 | else if (lp->limconst == RLIMIT_CPU) |
| 1023 | psecs((long)limit); |
| 1024 | else |
| 1025 | printf("%d %s", limit / lp->limdiv, lp->limscale); |
| 1026 | printf("\n"); |
| 1027 | } |
| 1028 | |
| 1029 | dounlimit(v) |
| 1030 | register char **v; |
| 1031 | { |
| 1032 | register struct limits *lp; |
| 1033 | int err = 0; |
| 1034 | char hard = 0; |
| 1035 | |
| 1036 | v++; |
| 1037 | if (*v && eq(*v, "-h")) { |
| 1038 | hard = 1; |
| 1039 | v++; |
| 1040 | } |
| 1041 | if (*v == 0) { |
| 1042 | for (lp = limits; lp->limconst >= 0; lp++) |
| 1043 | if (setlim(lp, hard, (int)RLIM_INFINITY) < 0) |
| 1044 | err++; |
| 1045 | if (err) |
| 1046 | error(NOSTR); |
| 1047 | return; |
| 1048 | } |
| 1049 | while (*v) { |
| 1050 | lp = findlim(*v++); |
| 1051 | if (setlim(lp, hard, (int)RLIM_INFINITY) < 0) |
| 1052 | error(NOSTR); |
| 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | setlim(lp, hard, limit) |
| 1057 | register struct limits *lp; |
| 1058 | char hard; |
| 1059 | { |
| 1060 | struct rlimit rlim; |
| 1061 | |
| 1062 | (void) getrlimit(lp->limconst, &rlim); |
| 1063 | if (hard) |
| 1064 | rlim.rlim_max = limit; |
| 1065 | else if (limit == RLIM_INFINITY && geteuid() != 0) |
| 1066 | rlim.rlim_cur = rlim.rlim_max; |
| 1067 | else |
| 1068 | rlim.rlim_cur = limit; |
| 1069 | if (setrlimit(lp->limconst, &rlim) < 0) { |
| 1070 | printf("%s: %s: Can't %s%s limit\n", bname, lp->limname, |
| 1071 | limit == RLIM_INFINITY ? "remove" : "set", |
| 1072 | hard ? " hard" : ""); |
| 1073 | return (-1); |
| 1074 | } |
| 1075 | return (0); |
| 1076 | } |
| 1077 | |
| 1078 | dosuspend() |
| 1079 | { |
| 1080 | int ldisc, ctpgrp; |
| 1081 | int (*old)(); |
| 1082 | |
| 1083 | if (loginsh) |
| 1084 | error("Can't suspend a login shell (yet)"); |
| 1085 | untty(); |
| 1086 | old = signal(SIGTSTP, SIG_DFL); |
| 1087 | (void) kill(0, SIGTSTP); |
| 1088 | /* the shell stops here */ |
| 1089 | (void) signal(SIGTSTP, old); |
| 1090 | if (tpgrp != -1) { |
| 1091 | retry: |
| 1092 | (void) ioctl(FSHTTY, TIOCGPGRP, (char *)&ctpgrp); |
| 1093 | if (ctpgrp != opgrp) { |
| 1094 | old = signal(SIGTTIN, SIG_DFL); |
| 1095 | (void) kill(0, SIGTTIN); |
| 1096 | (void) signal(SIGTTIN, old); |
| 1097 | goto retry; |
| 1098 | } |
| 1099 | (void) ioctl(FSHTTY, TIOCSPGRP, (char *)&shpgrp); |
| 1100 | (void) setpgrp(0, shpgrp); |
| 1101 | } |
| 1102 | (void) ioctl(FSHTTY, TIOCGETD, (char *)&oldisc); |
| 1103 | if (oldisc != NTTYDISC) { |
| 1104 | printf("Switching to new tty driver...\n"); |
| 1105 | ldisc = NTTYDISC; |
| 1106 | (void) ioctl(FSHTTY, TIOCSETD, (char *)&ldisc); |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | doeval(v) |
| 1111 | char **v; |
| 1112 | { |
| 1113 | char **oevalvec = evalvec; |
| 1114 | char *oevalp = evalp; |
| 1115 | jmp_buf osetexit; |
| 1116 | int reenter; |
| 1117 | char **gv = 0; |
| 1118 | |
| 1119 | v++; |
| 1120 | if (*v == 0) |
| 1121 | return; |
| 1122 | gflag = 0, tglob(v); |
| 1123 | if (gflag) { |
| 1124 | gv = v = glob(v); |
| 1125 | gargv = 0; |
| 1126 | if (v == 0) |
| 1127 | error("No match"); |
| 1128 | v = copyblk(v); |
| 1129 | } else |
| 1130 | trim(v); |
| 1131 | getexit(osetexit); |
| 1132 | reenter = 0; |
| 1133 | setexit(); |
| 1134 | reenter++; |
| 1135 | if (reenter == 1) { |
| 1136 | evalvec = v; |
| 1137 | evalp = 0; |
| 1138 | process(0); |
| 1139 | } |
| 1140 | evalvec = oevalvec; |
| 1141 | evalp = oevalp; |
| 1142 | doneinp = 0; |
| 1143 | if (gv) |
| 1144 | blkfree(gv); |
| 1145 | resexit(osetexit); |
| 1146 | if (reenter >= 2) |
| 1147 | error(NOSTR); |
| 1148 | } |