Commit | Line | Data |
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07c89ddd BJ |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | #include "sh.h" | |
3 | ||
4 | /* | |
5 | * C Shell | |
6 | * | |
7 | * Bill Joy, UC Berkeley | |
8 | * October, 1978 | |
9 | */ | |
10 | ||
11 | char *pathlist[] = { SRCHPATH, 0 }; | |
12 | ||
13 | main(c, av) | |
14 | int c; | |
15 | char **av; | |
16 | { | |
17 | register char **v, *cp; | |
18 | int nofile = 0; | |
19 | int reenter = 0; | |
20 | bool nverbose = 0, nexececho = 0, quitit = 0, fast = 0, prompt = 1; | |
21 | char *hp; | |
22 | ||
23 | settimes(); /* Immed. estab. timing base */ | |
24 | hp = getenv("HOME"); | |
25 | v = av; | |
26 | if (eq(v[0], "a.out")) /* A.out's are quittable */ | |
27 | quitit = 1; | |
28 | uid = getuid(); | |
29 | #ifdef V6 | |
30 | loginsh = eq(*v, "-"); /* To do .login/.logout */ | |
31 | #else | |
32 | loginsh = **v == '-'; | |
33 | #endif | |
34 | if (loginsh) | |
35 | time(&chktim); | |
36 | ||
37 | /* | |
38 | * Move the descriptors to safe places. | |
39 | * The variable didfds is 0 while we have only FSH* to work with. | |
40 | * When didfds is true, we have 0,1,2 and prefer to use these. | |
41 | */ | |
42 | initdesc(); | |
43 | ||
44 | /* | |
45 | * Initialize the shell variables. | |
46 | * ARGV and PROMPT are initialized later. | |
47 | * STATUS is also munged in several places. | |
48 | * CHILD is munged when forking/waiting | |
49 | */ | |
50 | ||
51 | set("status", "0"); | |
52 | if (hp == 0) | |
53 | fast++; /* No home -> can't read scripts */ | |
54 | else | |
55 | set("home", hp); | |
56 | if (uid == 0) | |
57 | pathlist[0] = "/etc"; | |
58 | set1("path", saveblk(pathlist), &shvhed); | |
59 | /* | |
60 | * Re-initialize path if set in environment | |
61 | * | |
62 | cp = getenv("PATH"); | |
63 | if (cp != 0) { | |
64 | register int i = 0; | |
65 | register char *dp; | |
66 | register char **pv; | |
67 | ||
68 | for (dp = cp; *dp; dp++) | |
69 | if (*dp == ':') | |
70 | i++; | |
71 | pv = calloc(i+1, sizeof (char **)); | |
72 | dp = cp; | |
73 | i = 0; | |
74 | while (*dp) { | |
75 | if (*dp == ':') { | |
76 | *dp = 0; | |
77 | pv[i++] = savestr(cp); | |
78 | *dp = ':'; | |
79 | } else if (*dp == 0) { | |
80 | pv[i++] = savestr(cp); | |
81 | break; | |
82 | } | |
83 | dp++; | |
84 | } | |
85 | pv[i] = 0; | |
86 | set1("path", pv, &shvhed); | |
87 | } | |
88 | */ | |
89 | set("shell", SHELLPATH); | |
90 | ||
91 | doldol = putn(getpid()); /* For $$ */ | |
92 | shtemp = strspl("/tmp/sh", doldol); /* For << */ | |
93 | ||
94 | /* | |
95 | * Record the interrupt states from the parent process. | |
96 | * If the parent is non-interruptible our hand must be forced | |
97 | * or we (and our children) won't be either. | |
98 | * Our children inherit termination from our parent. | |
99 | * We catch it only if we are the login shell. | |
100 | */ | |
101 | parintr = signal(SIGINT, SIG_IGN); /* parents interruptibility */ | |
102 | signal(SIGINT, parintr); /* ... restore */ | |
103 | parterm = signal(SIGTERM, SIG_IGN); /* parents terminability */ | |
104 | signal(SIGTERM, parterm); /* ... restore */ | |
105 | ||
106 | /* | |
107 | * Process the arguments. | |
108 | * | |
109 | * Note that processing of -v/-x is actually delayed till after | |
110 | * script processing. | |
111 | * | |
112 | * We set the first character of our name to be '-' if we are | |
113 | * a shell running interruptible commands. Many programs which | |
114 | * examine ps'es use this to filter such shells out. | |
115 | */ | |
116 | c--, v++; | |
117 | while (c > 0 && (cp = v[0])[0] == '-') { | |
118 | do switch (*cp++) { | |
119 | ||
120 | case 0: /* - Interruptible, no prompt */ | |
121 | prompt = 0; | |
122 | **av = '-'; | |
123 | nofile++; | |
124 | break; | |
125 | ||
126 | case 'c': /* -c Command input from arg */ | |
127 | if (c == 1) | |
128 | exit(0); | |
129 | c--, v++; | |
130 | arginp = v[0]; | |
131 | prompt = 0; | |
132 | nofile++; | |
133 | break; | |
134 | ||
135 | case 'e': /* -e Exit on any error */ | |
136 | exiterr++; | |
137 | break; | |
138 | ||
139 | case 'f': /* -f Fast start */ | |
140 | fast++; | |
141 | break; | |
142 | ||
143 | case 'i': /* -i Interactive, even if !intty */ | |
144 | intact++; | |
145 | **av = '-'; | |
146 | nofile++; | |
147 | break; | |
148 | ||
149 | case 'n': /* -n Don't execute */ | |
150 | noexec++; | |
151 | break; | |
152 | ||
153 | case 'q': /* -q (Undoc'd) ... die on quit */ | |
154 | quitit = 1; | |
155 | break; | |
156 | ||
157 | case 's': /* -s Read from std input */ | |
158 | nofile++; | |
159 | if (isatty(SHIN)) | |
160 | **v = '-'; | |
161 | break; | |
162 | ||
163 | case 't': /* -t Read one line from input */ | |
164 | onelflg = 2; | |
165 | if (isatty(SHIN)) | |
166 | **v = '-'; | |
167 | prompt = 0; | |
168 | nofile++; | |
169 | break; | |
170 | ||
171 | case 'v': /* -v Echo hist expanded input */ | |
172 | nverbose = 1; /* ... later */ | |
173 | break; | |
174 | ||
175 | case 'x': /* -x Echo just before execution */ | |
176 | nexececho = 1; /* ... later */ | |
177 | break; | |
178 | ||
179 | case 'V': /* -V Echo hist expanded input */ | |
180 | setNS("verbose"); /* NOW! */ | |
181 | break; | |
182 | ||
183 | case 'X': /* -X Echo just before execution */ | |
184 | setNS("echo"); /* NOW! */ | |
185 | break; | |
186 | ||
187 | } while (*cp); | |
188 | v++, c--; | |
189 | } | |
190 | ||
191 | if (quitit) /* With all due haste, for debugging */ | |
192 | signal(SIGQUIT, SIG_DFL); | |
193 | ||
194 | /* | |
195 | * Unless prevented by -, -c, -i, -s, or -t, if there | |
196 | * are remaining arguments the first of them is the name | |
197 | * of a shell file from which to read commands. | |
198 | */ | |
199 | if (nofile == 0 && c > 0) { | |
200 | nofile = open(v[0], 0); | |
201 | if (nofile < 0) { | |
202 | child++; /* So this ... */ | |
203 | Perror(v[0]); /* ... doesn't return */ | |
204 | } | |
205 | file = v[0]; | |
206 | SHIN = dmove(nofile, FSHIN); /* Replace FSHIN */ | |
207 | prompt = 0; | |
208 | c--, v++; | |
209 | } | |
210 | ||
211 | /* | |
212 | * Consider input a tty if it really is or we are interactive. | |
213 | */ | |
214 | intty = intact || isatty(SHIN); | |
215 | #ifdef TELL | |
216 | settell(); | |
217 | #endif | |
218 | /* | |
219 | * Commands are interruptible if we are interactive | |
220 | * or the process which created us was. | |
221 | */ | |
222 | if (intact || parintr == SIG_DFL) | |
223 | **av = '-'; | |
224 | ||
225 | /* | |
226 | * Save the remaining arguments in ARGV. | |
227 | * Normally the system-supplied argument list is ok as | |
228 | * a zero terminated value block. | |
229 | * On some version 6 systems, it is -1 terminated and setting it | |
230 | * to zero messes up "ps" so we change it to zero, copy | |
231 | * the block of pointers, and put it back the way it was. | |
232 | */ | |
233 | /* | |
234 | if (c == 0) | |
235 | set("argv", 0); | |
236 | else | |
237 | */ | |
238 | if ((int) v[c] == -1) { | |
239 | /* ick */ | |
240 | v[c] = 0, setq("argv", copyblk(v), &shvhed), v[c] = (char *) -1; | |
241 | } else | |
242 | setq("argv", v, &shvhed); | |
243 | ||
244 | /* | |
245 | * Set up the prompt. | |
246 | */ | |
247 | if (prompt) | |
248 | set("prompt", uid == 0 ? "# " : "% "); | |
249 | ||
250 | /* | |
251 | * If we are an interactive shell, then start fiddling | |
252 | * with the signals; this is a tricky game. | |
253 | */ | |
254 | if (**av == '-') { | |
255 | setintr++; | |
256 | if (!quitit) /* Wary! */ | |
257 | signal(SIGQUIT, SIG_IGN); | |
258 | signal(SIGINT, SIG_IGN); | |
259 | signal(SIGTERM, SIG_IGN); | |
260 | } | |
261 | ||
262 | /* | |
263 | * Set an exit here in case of an interrupt or error reading | |
264 | * the shell start-up scripts. | |
265 | */ | |
266 | setexit(); | |
267 | haderr = 0; /* In case second time through */ | |
268 | if (!fast && reenter == 0) { | |
269 | reenter++; | |
270 | /* Will have value("home") here because set fast if don't */ | |
271 | srccat(value("home"), "/.cshrc"); | |
272 | if (loginsh) | |
273 | #ifdef NOHELP | |
274 | srccat("", ".login"); | |
275 | #else | |
276 | srccat(value("home"), "/.login"); | |
277 | #endif | |
278 | } | |
279 | ||
280 | /* | |
281 | * Now are ready for the -v and -x flags | |
282 | */ | |
283 | if (nverbose) | |
284 | setNS("verbose"); | |
285 | if (nexececho) | |
286 | setNS("echo"); | |
287 | ||
288 | /* | |
289 | * All the rest of the world is inside this call. | |
290 | * The argument to process indicates whether it should | |
291 | * catch "error unwinds". Thus if we are a interactive shell | |
292 | * our call here will never return by being blown past on an error. | |
293 | */ | |
294 | process(setintr); | |
295 | ||
296 | /* | |
297 | * Mop-up. | |
298 | */ | |
299 | if (loginsh) { | |
300 | printf("logout\n"); | |
301 | close(SHIN); | |
302 | child++; | |
303 | goodbye(); | |
304 | } | |
305 | exitstat(); | |
306 | } | |
307 | ||
308 | /* | |
309 | * Source to the file which is the catenation of the argument names. | |
310 | */ | |
311 | srccat(cp, dp) | |
312 | char *cp, *dp; | |
313 | { | |
314 | register char *ep = strspl(cp, dp); | |
315 | register int unit = dmove(open(ep, 0), -1); | |
316 | ||
317 | /* ioctl(unit, FIOCLEX, NULL); */ | |
318 | xfree(ep); | |
319 | #ifdef INGRES | |
320 | srcunit(unit, 0); | |
321 | #else | |
322 | srcunit(unit, 1); | |
323 | #endif | |
324 | } | |
325 | ||
326 | /* | |
327 | * Source to a unit. If onlyown it must be our file or | |
328 | * we don't chance it. This occurs on ".cshrc"s and the like. | |
329 | */ | |
330 | srcunit(unit, onlyown) | |
331 | register int unit; | |
332 | bool onlyown; | |
333 | { | |
334 | /* We have to push down a lot of state here */ | |
335 | /* All this could go into a structure */ | |
336 | int oSHIN = -1, oldintty = intty; | |
337 | struct whyle *oldwhyl = whyles; | |
338 | char *ogointr = gointr, *oarginp = arginp; | |
339 | int oonelflg = onelflg; | |
340 | #ifdef TELL | |
341 | bool otell = cantell; | |
342 | #endif | |
343 | struct Bin saveB; | |
344 | ||
345 | /* The (few) real local variables */ | |
346 | jmp_buf oldexit; | |
347 | int reenter; | |
348 | register int (*oldint)(); | |
349 | ||
350 | if (unit < 0) | |
351 | return; | |
352 | if (onlyown) { | |
353 | struct stat stb; | |
354 | ||
355 | #ifdef CC | |
356 | if (fstat(unit, &stb) < 0 || (stb.st_uid != uid && stb.st_uid != (uid &~ 0377))) { | |
357 | #endif | |
358 | #ifdef CORY | |
359 | if (fstat(unit, &stb) < 0 || (stb.st_uid != uid && stb.st_uid != (uid &~ 0377))) { | |
360 | #endif | |
361 | #ifndef CC | |
362 | #ifndef CORY | |
363 | if (fstat(unit, &stb) < 0 || stb.st_uid != uid) { | |
364 | #endif | |
365 | #endif | |
366 | close(unit); | |
367 | return; | |
368 | } | |
369 | } | |
370 | ||
371 | /* | |
372 | * There is a critical section here while we are pushing down the | |
373 | * input stream since we have stuff in different structures. | |
374 | * If we weren't careful an interrupt could corrupt SHIN's Bin | |
375 | * structure and kill the shell. | |
376 | * | |
377 | * We could avoid the critical region by grouping all the stuff | |
378 | * in a single structure and pointing at it to move it all at | |
379 | * once. This is less efficient globally on many variable references | |
380 | * however. | |
381 | */ | |
382 | getexit(oldexit); | |
383 | reenter = 0; | |
384 | oldint = signal(SIGINT, SIG_IGN); | |
385 | setexit(); | |
386 | reenter++; | |
387 | if (reenter == 1) { | |
388 | /* Setup the new values of the state stuff saved above */ | |
389 | copy(&saveB, &B, sizeof saveB); | |
390 | fbuf = (char **) 0; | |
391 | fseekp = feobp = fblocks = 0; | |
392 | oSHIN = SHIN, SHIN = unit, arginp = 0, onelflg = 0; | |
393 | intty = isatty(SHIN), whyles = 0, gointr = 0; | |
394 | /* | |
395 | * Now if we are allowing commands to be interrupted, | |
396 | * we let ourselves be interrupted. | |
397 | */ | |
398 | signal(SIGINT, setintr ? pintr : oldint); | |
399 | #ifdef TELL | |
400 | settell(); | |
401 | #endif | |
402 | process(0); /* 0 -> blow away on errors */ | |
403 | } | |
404 | signal(SIGINT, oldint); | |
405 | if (oSHIN >= 0) { | |
406 | register int i; | |
407 | ||
408 | /* We made it to the new state... free up its storage */ | |
409 | /* This code could get run twice but xfree doesn't care */ | |
410 | for (i = 0; i < fblocks; i++) | |
411 | xfree(fbuf[i]); | |
412 | xfree(fbuf); | |
413 | ||
414 | /* Reset input arena */ | |
415 | copy(&B, &saveB, sizeof B); | |
416 | ||
417 | close(SHIN), SHIN = oSHIN; | |
418 | arginp = oarginp, onelflg = oonelflg; | |
419 | intty = oldintty, whyles = oldwhyl, gointr = ogointr; | |
420 | #ifdef TELL | |
421 | cantell = otell; | |
422 | #endif | |
423 | } | |
424 | ||
425 | resexit(oldexit); | |
426 | /* | |
427 | * If process reset() (effectively an unwind) then | |
428 | * we must also unwind. | |
429 | */ | |
430 | if (reenter >= 2) | |
431 | error(0); | |
432 | } | |
433 | ||
434 | goodbye() | |
435 | { | |
436 | ||
437 | if (loginsh) { | |
438 | signal(SIGQUIT, SIG_IGN); | |
439 | signal(SIGINT, SIG_IGN); | |
440 | signal(SIGTERM, SIG_IGN); | |
441 | setintr = 0; /* No interrupts after "logout" */ | |
442 | if (adrof("home")) | |
443 | srccat(value("home"), "/.logout"); | |
444 | } | |
445 | exitstat(); | |
446 | } | |
447 | ||
448 | exitstat() | |
449 | { | |
450 | ||
451 | /* | |
452 | * Note that if STATUS is corrupted (i.e. getn bombs) | |
453 | * then error will exit directly because we poke child here. | |
454 | * Otherwise we might continue unwarrantedly (sic). | |
455 | */ | |
456 | child++; | |
457 | exit(getn(value("status"))); | |
458 | } | |
459 | ||
460 | /* | |
461 | * Catch an interrupt, e.g. during lexical input. | |
462 | * If we are an interactive shell, we reset the interrupt catch | |
463 | * immediately. In any case we drain the shell output, | |
464 | * and finally go through the normal error mechanism, which | |
465 | * gets a chance to make the shell go away. | |
466 | */ | |
467 | pintr() | |
468 | { | |
469 | ||
470 | if (setintr) | |
471 | signal(SIGINT, SIG_IGN); | |
472 | draino(); | |
473 | ||
474 | /* | |
475 | * If we have an active "onintr" then we search for the label. | |
476 | * Note that if one does "onintr -" then we shan't be interruptible | |
477 | * so we needn't worry about that here. | |
478 | */ | |
479 | if (gointr) { | |
480 | search(ZGOTO, 0, gointr); | |
481 | timflg = 0; | |
482 | reset(); | |
483 | } else if (intty) | |
484 | printf("\n"); /* Some like this, others don't */ | |
485 | error(0); | |
486 | } | |
487 | ||
488 | /* | |
489 | * Process is the main driving routine for the shell. | |
490 | * It runs all command processing, except for those within { ... } | |
491 | * in expressions (which is run by a routine evalav in sh.exp.c which | |
492 | * is a stripped down process), and `...` evaluation which is run | |
493 | * also by a subset of this code in sh.glob.c in the routine backeval. | |
494 | * | |
495 | * The code here is a little strange because part of it is interruptible | |
496 | * and hence freeing of structures appears to occur when none is necessary | |
497 | * if this is ignored. | |
498 | * | |
499 | * Note that if catch is not set then we will unwind on any error. | |
500 | * In an end-of-file occurs, we return. | |
501 | */ | |
502 | process(catch) | |
503 | bool catch; | |
504 | { | |
505 | register char *cp; | |
506 | jmp_buf osetexit; | |
507 | struct wordent paraml; | |
508 | struct command *t; | |
509 | ||
510 | getexit(osetexit); | |
511 | for (;;) { | |
512 | paraml.next = paraml.prev = ¶ml; | |
513 | paraml.word = ""; | |
514 | t = 0; | |
515 | setexit(); | |
516 | justpr = 0; /* A chance to execute */ | |
517 | ||
518 | /* | |
519 | * Interruptible during interactive reads | |
520 | */ | |
521 | if (setintr) | |
522 | signal(SIGINT, pintr); | |
523 | ||
524 | /* | |
525 | * For the sake of reset() | |
526 | */ | |
527 | freelex(¶ml), freesyn(t), t = 0; | |
528 | ||
529 | if (haderr) { | |
530 | if (!catch) { | |
531 | /* unwind */ | |
532 | doneinp = 0; | |
533 | resexit(osetexit); | |
534 | reset(); | |
535 | } | |
536 | haderr = 0; | |
537 | /* | |
538 | * Every error is eventually caught here or | |
539 | * the shell dies. It is at this | |
540 | * point that we clean up any left-over open | |
541 | * files, by closing all but a fixed number | |
542 | * of pre-defined files. Thus routines don't | |
543 | * have to worry about leaving files open due | |
544 | * to deeper errors... they will get closed here. | |
545 | */ | |
546 | closem(); | |
547 | continue; | |
548 | } | |
549 | if (doneinp) { | |
550 | doneinp = 0; | |
551 | break; | |
552 | } | |
553 | if (intty) { | |
554 | mailchk(); | |
555 | /* | |
556 | * If we are at the end of the input buffer | |
557 | * then we are going to read fresh stuff. | |
558 | * Otherwise, we are rereading input and don't | |
559 | * need or want to prompt. | |
560 | */ | |
561 | if (fseekp == feobp) | |
562 | if (!whyles) | |
563 | for (cp = value("prompt"); *cp; cp++) | |
564 | if (*cp == '!') | |
565 | printf("%d", eventno + 1); | |
566 | else { | |
567 | if (*cp == '\\' && cp[1] == '!') | |
568 | cp++; | |
569 | putchar(*cp | QUOTE); | |
570 | } | |
571 | else | |
572 | /* | |
573 | * Prompt for forward reading loop | |
574 | * body content. | |
575 | */ | |
576 | printf("? "); | |
577 | flush(); | |
578 | } | |
579 | err = 0; | |
580 | ||
581 | /* | |
582 | * Echo not only on VERBOSE, but also with history expansion. | |
583 | * If there is a lexical error then we forego history echo. | |
584 | */ | |
585 | if (lex(¶ml) && !err && intty || adrof("verbose")) { | |
586 | haderr = 1; | |
587 | prlex(¶ml); | |
588 | haderr = 0; | |
589 | } | |
590 | ||
591 | /* | |
592 | * The parser may lose space if interrupted. | |
593 | */ | |
594 | if (setintr) | |
595 | signal(SIGINT, SIG_IGN); | |
596 | ||
597 | /* | |
598 | * Save input text on the history list if it | |
599 | * is from the terminal at the top level and not | |
600 | * in a loop. | |
601 | */ | |
602 | if (catch && intty && !whyles) | |
603 | savehist(¶ml); | |
604 | ||
605 | /* | |
606 | * Print lexical error messages. | |
607 | */ | |
608 | if (err) | |
609 | error(err); | |
610 | ||
611 | /* | |
612 | * If had a history command :p modifier then | |
613 | * this is as far as we should go | |
614 | */ | |
615 | if (justpr) | |
616 | reset(); | |
617 | ||
618 | alias(¶ml); | |
619 | ||
620 | /* | |
621 | * Parse the words of the input into a parse tree. | |
622 | */ | |
623 | t = syntax(paraml.next, ¶ml); | |
624 | if (err) | |
625 | error(err); | |
626 | ||
627 | /* | |
628 | * Execute the parse tree | |
629 | */ | |
630 | execute(t); | |
631 | ||
632 | /* | |
633 | * Made it! | |
634 | */ | |
635 | freelex(¶ml), freesyn(t); | |
636 | } | |
637 | resexit(osetexit); | |
638 | } | |
639 | ||
640 | dosource(t) | |
641 | register char **t; | |
642 | { | |
643 | register char *f; | |
644 | register int u; | |
645 | ||
646 | t++; | |
647 | f = globone(*t); | |
648 | u = dmove(open(f, 0), -1); | |
649 | xfree(f); | |
650 | if (u < 0) | |
651 | Perror(f); | |
652 | srcunit(u, 0); | |
653 | } | |
654 | ||
655 | /* | |
656 | * Check for mail. | |
657 | * If we are a login shell, then we don't want to tell | |
658 | * about any mail file unless its been modified | |
659 | * after the time we started. | |
660 | * This prevents us from telling the user things he already | |
661 | * knows, since the login program insist on saying | |
662 | * "You have mail." | |
663 | */ | |
664 | mailchk() | |
665 | { | |
666 | register struct varent *v; | |
667 | register char **vp; | |
668 | time_t t; | |
669 | int intvl, cnt; | |
670 | ||
671 | v = adrof("mail"); | |
672 | if (v == 0) | |
673 | return; | |
674 | time(&t); | |
675 | vp = v->vec; | |
676 | cnt = blklen(vp); | |
677 | intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; | |
678 | if (intvl < 1) | |
679 | intvl = 1; | |
680 | if (chktim + intvl > t) | |
681 | return; | |
682 | for (; *vp; vp++) { | |
683 | bool new; | |
684 | struct stat stb; | |
685 | ||
686 | if (stat(*vp, &stb) < 0) | |
687 | continue; | |
688 | /* | |
689 | * We assume that a file has been read if the access time is | |
690 | * greater than the mod time. | |
691 | */ | |
692 | #ifndef CORY | |
693 | if (stb.st_size == 0) | |
694 | continue; | |
695 | #endif | |
696 | if (stb.st_atime > stb.st_mtime || stb.st_atime < chktim) | |
697 | continue; | |
698 | new = stb.st_mtime > time0; | |
699 | if (loginsh && !new) | |
700 | continue; | |
701 | if (cnt == 1) | |
702 | printf("You have %smail.\n", new ? "new " : ""); | |
703 | else | |
704 | printf("%s in %s.\n", new ? "New mail" : "Mail", *vp); | |
705 | } | |
706 | chktim = t; | |
707 | } | |
708 | ||
709 | #include <pwd.h> | |
710 | /* | |
711 | * Extract a home directory from the password file | |
712 | * The argument points to a buffer where the name of the | |
713 | * user whose home directory is sought is currently. | |
714 | * We write the home directory of the user back there. | |
715 | */ | |
716 | gethdir(home) | |
717 | char *home; | |
718 | { | |
719 | register struct passwd *pp = getpwnam(home); | |
720 | ||
721 | if (pp == 0) | |
722 | return (1); | |
723 | strcpy(home, pp->pw_dir); | |
724 | return (0); | |
725 | } | |
726 | ||
727 | /* | |
728 | * Move the initial descriptors to their eventual | |
729 | * resting places, closin all other units. | |
730 | */ | |
731 | initdesc() | |
732 | { | |
733 | ||
734 | didcch = 0; /* Havent closed for child */ | |
735 | didfds = 0; /* 0, 1, 2 aren't set up */ | |
736 | SHIN = dcopy(0, FSHIN); | |
737 | SHOUT = dcopy(1, FSHOUT); | |
738 | SHDIAG = dcopy(2, FSHDIAG); | |
739 | OLDSTD = dcopy(SHIN, FOLDSTD); | |
740 | closem(); | |
741 | } | |
742 | ||
743 | #ifndef V6 | |
744 | exit(i) | |
745 | int i; | |
746 | { | |
747 | ||
748 | _exit(i); | |
749 | } | |
750 | #endif |