Commit | Line | Data |
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2a24676e DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
536150a4 | 6 | |
2a24676e | 7 | #ifndef lint |
9606e7b9 | 8 | static char sccsid[] = "@(#)library.c 5.2 (Berkeley) %G%"; |
2a24676e | 9 | #endif not lint |
0022c355 | 10 | |
9606e7b9 | 11 | static char rcsid[] = "$Header: library.c,v 1.2 87/03/25 20:50:14 donn Exp $"; |
2fd0f574 | 12 | |
536150a4 ML |
13 | /* |
14 | * General purpose routines. | |
15 | */ | |
16 | ||
17 | #include <stdio.h> | |
18 | #include <errno.h> | |
19 | #include <signal.h> | |
20 | ||
21 | #define public | |
22 | #define private static | |
23 | #define and && | |
24 | #define or || | |
25 | #define not ! | |
26 | #define ord(enumcon) ((int) enumcon) | |
27 | #define nil(type) ((type) 0) | |
28 | ||
2fd0f574 SL |
29 | typedef int integer; |
30 | typedef enum { FALSE, TRUE } boolean; | |
536150a4 ML |
31 | typedef char *String; |
32 | typedef FILE *File; | |
33 | typedef String Filename; | |
34 | ||
35 | #undef FILE | |
36 | ||
536150a4 ML |
37 | String cmdname; /* name of command for error messages */ |
38 | Filename errfilename; /* current file associated with error */ | |
39 | short errlineno; /* line number associated with error */ | |
40 | ||
41 | /* | |
42 | * Definitions for doing memory allocation. | |
43 | */ | |
44 | ||
45 | extern char *malloc(); | |
46 | ||
47 | #define alloc(n, type) ((type *) malloc((unsigned) (n) * sizeof(type))) | |
48 | #define dispose(p) { free((char *) p); p = 0; } | |
49 | ||
50 | /* | |
51 | * Macros for doing freads + fwrites. | |
52 | */ | |
53 | ||
54 | #define get(fp, var) fread((char *) &(var), sizeof(var), 1, fp) | |
55 | #define put(fp, var) fwrite((char *) &(var), sizeof(var), 1, fp) | |
56 | ||
57 | /* | |
58 | * String definitions. | |
59 | */ | |
60 | ||
61 | extern String strcpy(), index(), rindex(); | |
62 | extern int strlen(); | |
63 | ||
64 | #define strdup(s) strcpy(malloc((unsigned) strlen(s) + 1), s) | |
65 | #define streq(s1, s2) (strcmp(s1, s2) == 0) | |
66 | ||
9606e7b9 DS |
67 | typedef int IntFunc(); |
68 | ||
69 | IntFunc *onsyserr(); | |
536150a4 ML |
70 | |
71 | typedef struct { | |
9606e7b9 DS |
72 | IntFunc *func; |
73 | } ErrInfo; | |
536150a4 | 74 | |
9606e7b9 DS |
75 | #define ERR_IGNORE ((IntFunc *) 0) |
76 | #define ERR_CATCH ((IntFunc *) 1) | |
536150a4 ML |
77 | |
78 | /* | |
79 | * Call a program. | |
80 | * | |
81 | * Four entries: | |
82 | * | |
83 | * call, callv - call a program and wait for it, returning status | |
84 | * back, backv - call a program and don't wait, returning process id | |
85 | * | |
86 | * The command's standard input and output are passed as FILE's. | |
87 | */ | |
88 | ||
89 | ||
2fd0f574 | 90 | #define MAXNARGS 1000 /* unchecked upper limit on max num of arguments */ |
536150a4 ML |
91 | #define BADEXEC 127 /* exec fails */ |
92 | ||
93 | #define ischild(pid) ((pid) == 0) | |
94 | ||
95 | /* VARARGS3 */ | |
96 | public int call(name, in, out, args) | |
97 | String name; | |
98 | File in; | |
99 | File out; | |
100 | String args; | |
101 | { | |
102 | String *ap, *argp; | |
103 | String argv[MAXNARGS]; | |
104 | ||
105 | argp = &argv[0]; | |
106 | *argp++ = name; | |
107 | ap = &args; | |
108 | while (*ap != nil(String)) { | |
109 | *argp++ = *ap++; | |
110 | } | |
111 | *argp = nil(String); | |
112 | return callv(name, in, out, argv); | |
113 | } | |
114 | ||
115 | /* VARARGS3 */ | |
116 | public int back(name, in, out, args) | |
117 | String name; | |
118 | File in; | |
119 | File out; | |
120 | String args; | |
121 | { | |
122 | String *ap, *argp; | |
123 | String argv[MAXNARGS]; | |
124 | ||
125 | argp = &argv[0]; | |
126 | *argp++ = name; | |
127 | ap = &args; | |
128 | while (*ap != nil(String)) { | |
129 | *argp++ = *ap++; | |
130 | } | |
131 | *argp = nil(String); | |
132 | return backv(name, in, out, argv); | |
133 | } | |
134 | ||
135 | public int callv(name, in, out, argv) | |
136 | String name; | |
137 | File in; | |
138 | File out; | |
139 | String *argv; | |
140 | { | |
141 | int pid, status; | |
142 | ||
143 | pid = backv(name, in, out, argv); | |
144 | pwait(pid, &status); | |
145 | return status; | |
146 | } | |
147 | ||
148 | public int backv(name, in, out, argv) | |
149 | String name; | |
150 | File in; | |
151 | File out; | |
152 | String *argv; | |
153 | { | |
154 | int pid; | |
155 | ||
156 | fflush(stdout); | |
157 | if (ischild(pid = fork())) { | |
158 | fswap(0, fileno(in)); | |
159 | fswap(1, fileno(out)); | |
160 | onsyserr(EACCES, ERR_IGNORE); | |
161 | execvp(name, argv); | |
162 | _exit(BADEXEC); | |
163 | } | |
164 | return pid; | |
165 | } | |
166 | ||
167 | /* | |
168 | * Swap file numbers so as to redirect standard input and output. | |
169 | */ | |
170 | ||
171 | private fswap(oldfd, newfd) | |
172 | int oldfd; | |
173 | int newfd; | |
174 | { | |
175 | if (oldfd != newfd) { | |
176 | close(oldfd); | |
177 | dup(newfd); | |
178 | close(newfd); | |
179 | } | |
180 | } | |
181 | ||
182 | /* | |
183 | * Invoke a shell on a command line. | |
184 | */ | |
185 | ||
186 | #define DEF_SHELL "csh" | |
187 | ||
188 | public shell(s) | |
189 | String s; | |
190 | { | |
191 | extern String getenv(); | |
192 | String sh; | |
193 | ||
194 | if ((sh = getenv("SHELL")) == nil(String)) { | |
195 | sh = DEF_SHELL; | |
196 | } | |
197 | if (s != nil(String) and *s != '\0') { | |
198 | call(sh, stdin, stdout, "-c", s, 0); | |
199 | } else { | |
200 | call(sh, stdin, stdout, 0); | |
201 | } | |
202 | } | |
203 | ||
204 | /* | |
205 | * Wait for a process the right way. We wait for a particular | |
206 | * process and if any others come along in between, we remember them | |
207 | * in case they are eventually waited for. | |
208 | * | |
209 | * This routine is not very efficient when the number of processes | |
210 | * to be remembered is large. | |
ec4f7c5c ML |
211 | * |
212 | * To deal with a kernel idiosyncrasy, we keep a list on the side | |
213 | * of "traced" processes, and do not notice them when waiting for | |
214 | * another process. | |
536150a4 ML |
215 | */ |
216 | ||
217 | typedef struct pidlist { | |
218 | int pid; | |
219 | int status; | |
220 | struct pidlist *next; | |
221 | } Pidlist; | |
222 | ||
ec4f7c5c ML |
223 | private Pidlist *pidlist, *ptrclist, *pfind(); |
224 | ||
225 | public ptraced(pid) | |
226 | int pid; | |
227 | { | |
228 | Pidlist *p; | |
229 | ||
230 | p = alloc(1, Pidlist); | |
231 | p->pid = pid; | |
232 | p->next = ptrclist; | |
233 | ptrclist = p; | |
234 | } | |
235 | ||
236 | public unptraced(pid) | |
237 | int pid; | |
238 | { | |
239 | register Pidlist *p, *prev; | |
240 | ||
241 | prev = nil(Pidlist *); | |
242 | p = ptrclist; | |
243 | while (p != nil(Pidlist *) and p->pid != pid) { | |
244 | prev = p; | |
245 | p = p->next; | |
246 | } | |
247 | if (p != nil(Pidlist *)) { | |
248 | if (prev == nil(Pidlist *)) { | |
249 | ptrclist = p->next; | |
250 | } else { | |
251 | prev->next = p->next; | |
252 | } | |
253 | dispose(p); | |
254 | } | |
255 | } | |
256 | ||
2fd0f574 | 257 | private boolean isptraced(pid) |
ec4f7c5c ML |
258 | int pid; |
259 | { | |
260 | register Pidlist *p; | |
261 | ||
262 | p = ptrclist; | |
263 | while (p != nil(Pidlist *) and p->pid != pid) { | |
264 | p = p->next; | |
265 | } | |
2fd0f574 | 266 | return (boolean) (p != nil(Pidlist *)); |
ec4f7c5c | 267 | } |
536150a4 ML |
268 | |
269 | public pwait(pid, statusp) | |
270 | int pid, *statusp; | |
271 | { | |
b3738d36 ML |
272 | Pidlist *p; |
273 | int pnum, status; | |
536150a4 | 274 | |
b3738d36 ML |
275 | p = pfind(pid); |
276 | if (p != nil(Pidlist *)) { | |
277 | *statusp = p->status; | |
278 | dispose(p); | |
b3738d36 | 279 | } else { |
ec4f7c5c ML |
280 | pnum = wait(&status); |
281 | while (pnum != pid and pnum >= 0) { | |
282 | if (not isptraced(pnum)) { | |
283 | p = alloc(1, Pidlist); | |
284 | p->pid = pnum; | |
285 | p->status = status; | |
286 | p->next = pidlist; | |
287 | pidlist = p; | |
288 | } | |
289 | pnum = wait(&status); | |
290 | } | |
291 | if (pnum < 0) { | |
292 | p = pfind(pid); | |
293 | if (p == nil(Pidlist *)) { | |
294 | panic("pwait: pid %d not found", pid); | |
295 | } | |
296 | *statusp = p->status; | |
297 | dispose(p); | |
298 | } else { | |
299 | *statusp = status; | |
300 | } | |
b3738d36 | 301 | } |
536150a4 ML |
302 | } |
303 | ||
304 | /* | |
305 | * Look for the given process id on the pidlist. | |
306 | * | |
307 | * Unlink it from list if found. | |
308 | */ | |
309 | ||
310 | private Pidlist *pfind(pid) | |
311 | int pid; | |
312 | { | |
313 | register Pidlist *p, *prev; | |
314 | ||
315 | prev = nil(Pidlist *); | |
316 | for (p = pidlist; p != nil(Pidlist *); p = p->next) { | |
317 | if (p->pid == pid) { | |
318 | break; | |
319 | } | |
320 | prev = p; | |
321 | } | |
322 | if (p != nil(Pidlist *)) { | |
323 | if (prev == nil(Pidlist *)) { | |
324 | pidlist = p->next; | |
325 | } else { | |
326 | prev->next = p->next; | |
327 | } | |
328 | } | |
329 | return p; | |
330 | } | |
331 | ||
332 | /* | |
333 | * System call error handler. | |
334 | * | |
335 | * The syserr routine is called when a system call is about to | |
336 | * set the c-bit to report an error. Certain errors are caught | |
337 | * and cause the process to print a message and immediately exit. | |
338 | */ | |
339 | ||
340 | extern int sys_nerr; | |
341 | extern char *sys_errlist[]; | |
342 | ||
343 | /* | |
344 | * Before calling syserr, the integer errno is set to contain the | |
345 | * number of the error. The routine "_mycerror" is a dummy which | |
346 | * is used to force the loader to get my version of cerror rather | |
347 | * than the usual one. | |
348 | */ | |
349 | ||
350 | extern int errno; | |
351 | extern _mycerror(); | |
352 | ||
353 | /* | |
2fd0f574 | 354 | * Initialize error information, setting defaults for handling errors. |
536150a4 ML |
355 | */ |
356 | ||
9606e7b9 | 357 | private ErrInfo *errinfo; |
2fd0f574 SL |
358 | |
359 | private initErrInfo () | |
360 | { | |
361 | integer i; | |
362 | ||
9606e7b9 | 363 | errinfo = alloc(sys_nerr, ErrInfo); |
2fd0f574 SL |
364 | for (i = 0; i < sys_nerr; i++) { |
365 | errinfo[i].func = ERR_CATCH; | |
366 | } | |
367 | errinfo[0].func = ERR_IGNORE; | |
368 | errinfo[EPERM].func = ERR_IGNORE; | |
369 | errinfo[ENOENT].func = ERR_IGNORE; | |
370 | errinfo[ESRCH].func = ERR_IGNORE; | |
371 | errinfo[EBADF].func = ERR_IGNORE; | |
372 | errinfo[ENOTTY].func = ERR_IGNORE; | |
373 | errinfo[EOPNOTSUPP].func = ERR_IGNORE; | |
374 | } | |
536150a4 ML |
375 | |
376 | public syserr() | |
377 | { | |
9606e7b9 | 378 | register ErrInfo *e; |
536150a4 | 379 | |
2fd0f574 SL |
380 | if (errno < 0 or errno > sys_nerr) { |
381 | fatal("errno %d", errno); | |
382 | } else { | |
9606e7b9 | 383 | if (errinfo == nil(ErrInfo *)) { |
2fd0f574 SL |
384 | initErrInfo(); |
385 | } | |
386 | e = &(errinfo[errno]); | |
387 | if (e->func == ERR_CATCH) { | |
536150a4 | 388 | fatal(sys_errlist[errno]); |
2fd0f574 SL |
389 | } else if (e->func != ERR_IGNORE) { |
390 | (*e->func)(); | |
536150a4 | 391 | } |
536150a4 ML |
392 | } |
393 | } | |
394 | ||
395 | /* | |
2fd0f574 SL |
396 | * Catcherrs' purpose is to initialize the errinfo table, get this module |
397 | * loaded, and make sure my cerror is loaded (only applicable when this is | |
398 | * in a library). | |
536150a4 ML |
399 | */ |
400 | ||
401 | public catcherrs() | |
402 | { | |
403 | _mycerror(); | |
2fd0f574 | 404 | initErrInfo(); |
536150a4 ML |
405 | } |
406 | ||
0022c355 ML |
407 | /* |
408 | * Turn off the error catching mechanism completely by having all errors | |
409 | * ignored. This is most useful between a fork and an exec. | |
410 | */ | |
411 | ||
412 | public nocatcherrs() | |
413 | { | |
414 | integer i; | |
415 | ||
416 | for (i = 0; i < sys_nerr; i++) { | |
417 | errinfo[i].func = ERR_IGNORE; | |
418 | } | |
419 | } | |
420 | ||
536150a4 | 421 | /* |
9606e7b9 | 422 | * Change the action on receipt of an error, returning the previous action. |
536150a4 ML |
423 | */ |
424 | ||
9606e7b9 | 425 | public IntFunc *onsyserr(n, f) |
536150a4 | 426 | int n; |
9606e7b9 | 427 | IntFunc *f; |
536150a4 | 428 | { |
9606e7b9 DS |
429 | IntFunc *oldf; |
430 | ||
431 | if (errinfo == nil(ErrInfo *)) { | |
2fd0f574 SL |
432 | initErrInfo(); |
433 | } | |
9606e7b9 | 434 | oldf = errinfo[n].func; |
536150a4 | 435 | errinfo[n].func = f; |
9606e7b9 | 436 | return oldf; |
536150a4 ML |
437 | } |
438 | ||
439 | /* | |
440 | * Print the message associated with the given signal. | |
441 | * Like a "perror" for signals. | |
442 | */ | |
443 | ||
9606e7b9 | 444 | #ifdef SIGWINCH |
536150a4 | 445 | public int sys_nsig = NSIG; |
9606e7b9 DS |
446 | #else not 4.3 BSD |
447 | /* | |
448 | * This table is correct for 4.2-like systems but will | |
449 | * be inadequate for System V (which is the sort of | |
450 | * Unix that needs it!). | |
451 | */ | |
452 | public String sys_siglist[] = { | |
453 | "no signal", | |
454 | "hangup", | |
455 | "interrupt", | |
456 | "quit", | |
457 | "illegal instruction", | |
458 | "trace trap", | |
459 | "IOT instruction", | |
460 | "EMT instruction", | |
461 | "floating point exception", | |
462 | "kill", | |
463 | "bus error", | |
464 | "segmentation violation", | |
465 | "bad argument to system call", | |
466 | "broken pipe", | |
467 | "alarm clock", | |
468 | "soft kill", | |
469 | "urgent I/O condition", | |
470 | "stop signal not from tty", | |
471 | "stop signal from tty", | |
472 | "continue", | |
473 | "child termination", | |
474 | "stop (tty input)", | |
475 | "stop (tty output)", | |
476 | "possible input/output", | |
477 | "exceeded CPU time limit", | |
478 | "exceeded file size limit" | |
479 | }; | |
480 | public int sys_nsig = sizeof sys_siglist / sizeof sys_siglist[0]; | |
481 | #endif | |
536150a4 | 482 | |
2fd0f574 | 483 | public psignal(s, n) |
536150a4 | 484 | String s; |
2fd0f574 | 485 | integer n; |
536150a4 | 486 | { |
2fd0f574 SL |
487 | String msg; |
488 | integer len; | |
fe99b76d | 489 | extern String sys_siglist[]; |
536150a4 | 490 | |
2fd0f574 SL |
491 | if (n >= 0 and n < sys_nsig) { |
492 | msg = sys_siglist[n]; | |
493 | } else { | |
494 | msg = "Unknown signal"; | |
536150a4 | 495 | } |
2fd0f574 SL |
496 | len = strlen(s); |
497 | if (len > 0) { | |
498 | write(2, s, len); | |
536150a4 ML |
499 | write(2, ": ", 2); |
500 | } | |
2fd0f574 | 501 | write(2, msg, strlen(msg)); |
536150a4 ML |
502 | write(2, "\n", 1); |
503 | } | |
504 | ||
505 | /* | |
506 | * Standard error handling routines. | |
507 | */ | |
508 | ||
509 | private short nerrs; | |
510 | private short nwarnings; | |
511 | ||
512 | /* | |
513 | * Main driver of error message reporting. | |
514 | */ | |
515 | ||
516 | /* VARARGS2 */ | |
517 | private errmsg(errname, shouldquit, s, a, b, c, d, e, f, g, h, i, j, k, l, m) | |
518 | String errname; | |
2fd0f574 | 519 | boolean shouldquit; |
536150a4 ML |
520 | String s; |
521 | { | |
522 | fflush(stdout); | |
523 | if (shouldquit and cmdname != nil(String)) { | |
524 | fprintf(stderr, "%s: ", cmdname); | |
525 | } | |
526 | if (errfilename != nil(Filename)) { | |
527 | fprintf(stderr, "%s: ", errfilename); | |
528 | } | |
529 | if (errlineno > 0) { | |
530 | fprintf(stderr, "%d: ", errlineno); | |
531 | } | |
532 | if (errname != nil(String)) { | |
533 | fprintf(stderr, "%s: ", errname); | |
534 | } | |
535 | fprintf(stderr, s, a, b, c, d, e, f, g, h, i, j, k, l, m); | |
536 | putc('\n', stderr); | |
9606e7b9 | 537 | fflush(stderr); |
536150a4 ML |
538 | if (shouldquit) { |
539 | quit(1); | |
540 | } | |
541 | } | |
542 | ||
543 | /* | |
544 | * For when printf isn't sufficient for printing the error message ... | |
545 | */ | |
546 | ||
547 | public beginerrmsg() | |
548 | { | |
549 | fflush(stdout); | |
550 | if (errfilename != nil(String)) { | |
551 | fprintf(stderr, "%s: ", errfilename); | |
552 | } | |
553 | if (errlineno > 0) { | |
554 | fprintf(stderr, "%d: ", errlineno); | |
555 | } | |
556 | } | |
557 | ||
558 | public enderrmsg() | |
559 | { | |
560 | putc('\n', stderr); | |
9606e7b9 | 561 | fflush(stderr); |
536150a4 ML |
562 | erecover(); |
563 | } | |
564 | ||
565 | /* | |
566 | * The messages are listed in increasing order of seriousness. | |
567 | * | |
568 | * First are warnings. | |
569 | */ | |
570 | ||
571 | /* VARARGS1 */ | |
572 | public warning(s, a, b, c, d, e, f, g, h, i, j, k, l, m) | |
573 | String s; | |
574 | { | |
575 | nwarnings++; | |
576 | errmsg("warning", FALSE, s, a, b, c, d, e, f, g, h, i, j, k, l, m); | |
577 | } | |
578 | ||
579 | /* | |
580 | * Errors are a little worse, they mean something is wrong, | |
581 | * but not so bad that processing can't continue. | |
582 | * | |
583 | * The routine "erecover" is called to recover from the error, | |
584 | * a default routine is provided that does nothing. | |
585 | */ | |
586 | ||
587 | /* VARARGS1 */ | |
588 | public error(s, a, b, c, d, e, f, g, h, i, j, k, l, m) | |
589 | String s; | |
590 | { | |
591 | extern erecover(); | |
592 | ||
593 | nerrs++; | |
594 | errmsg(nil(String), FALSE, s, a, b, c, d, e, f, g, h, i, j, k, l, m); | |
595 | erecover(); | |
596 | } | |
597 | ||
598 | /* | |
599 | * Non-recoverable user error. | |
600 | */ | |
601 | ||
602 | /* VARARGS1 */ | |
603 | public fatal(s, a, b, c, d, e, f, g, h, i, j, k, l, m) | |
604 | String s; | |
605 | { | |
606 | errmsg("fatal error", TRUE, s, a, b, c, d, e, f, g, h, i, j, k, l, m); | |
607 | } | |
608 | ||
609 | /* | |
610 | * Panics indicate an internal program error. | |
611 | */ | |
612 | ||
613 | /* VARARGS1 */ | |
614 | public panic(s, a, b, c, d, e, f, g, h, i, j, k, l, m) | |
615 | String s; | |
616 | { | |
617 | errmsg("internal error", TRUE, s, a, b, c, d, e, f, g, h, i, j, k, l, m); | |
618 | } | |
619 | ||
620 | short numerrors() | |
621 | { | |
622 | short r; | |
623 | ||
624 | r = nerrs; | |
625 | nerrs = 0; | |
626 | return r; | |
627 | } | |
628 | ||
629 | short numwarnings() | |
630 | { | |
631 | short r; | |
632 | ||
633 | r = nwarnings; | |
634 | nwarnings = 0; | |
635 | return r; | |
636 | } | |
637 | ||
638 | /* | |
639 | * Recover from an error. | |
640 | * | |
641 | * This is the default routine which we aren't using since we have our own. | |
642 | * | |
643 | public erecover() | |
644 | { | |
645 | } | |
646 | * | |
647 | */ | |
648 | ||
649 | /* | |
650 | * Default way to quit from a program is just to exit. | |
651 | * | |
652 | public quit(r) | |
653 | int r; | |
654 | { | |
655 | exit(r); | |
656 | } | |
657 | * | |
658 | */ | |
659 | ||
660 | /* | |
661 | * Compare n-byte areas pointed to by s1 and s2 | |
662 | * if n is 0 then compare up until one has a null byte. | |
663 | */ | |
664 | ||
665 | public int cmp(s1, s2, n) | |
666 | register char *s1, *s2; | |
667 | register unsigned int n; | |
668 | { | |
669 | if (s1 == nil(char *) || s2 == nil(char *)) { | |
670 | panic("cmp: nil pointer"); | |
671 | } | |
672 | if (n == 0) { | |
673 | while (*s1 == *s2++) { | |
674 | if (*s1++ == '\0') { | |
675 | return(0); | |
676 | } | |
677 | } | |
678 | return(*s1 - *(s2-1)); | |
679 | } else { | |
680 | for (; n != 0; n--) { | |
681 | if (*s1++ != *s2++) { | |
682 | return(*(s1-1) - *(s2-1)); | |
683 | } | |
684 | } | |
685 | return(0); | |
686 | } | |
687 | } | |
688 | ||
689 | /* | |
690 | * Move n bytes from src to dest. | |
691 | * If n is 0 move until a null is found. | |
692 | */ | |
693 | ||
694 | public mov(src, dest, n) | |
695 | register char *src, *dest; | |
696 | register unsigned int n; | |
697 | { | |
698 | if (src == nil(char *)) | |
699 | panic("mov: nil source"); | |
700 | if (dest == nil(char *)) | |
701 | panic("mov: nil destination"); | |
702 | if (n != 0) { | |
703 | for (; n != 0; n--) { | |
704 | *dest++ = *src++; | |
705 | } | |
706 | } else { | |
707 | while ((*dest++ = *src++) != '\0'); | |
708 | } | |
709 | } | |
9606e7b9 DS |
710 | |
711 | #ifdef IRIS /* or in general for 4.2 - System V C library interface */ | |
712 | ||
713 | public bcopy (fromaddr, toaddr, n) | |
714 | char *fromaddr, *toaddr; | |
715 | int n; | |
716 | { | |
717 | blt(toaddr, fromaddr, n); | |
718 | } | |
719 | ||
720 | public bzero (addr, n) | |
721 | char *addr; | |
722 | int n; | |
723 | { | |
724 | register char *p, *q; | |
725 | ||
726 | p = addr; | |
727 | q = p + n; | |
728 | while (p < q) { | |
729 | *p++ = '\0'; | |
730 | } | |
731 | } | |
732 | ||
733 | #include <string.h> | |
734 | ||
735 | public char *index (s, c) | |
736 | char *s, c; | |
737 | { | |
738 | return strchr(s, c); | |
739 | } | |
740 | ||
741 | public char *rindex (s, c) | |
742 | char *s, c; | |
743 | { | |
744 | return strrchr(s, c); | |
745 | } | |
746 | ||
747 | #endif |