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BSD 4_4_Lite1 development
[unix-history] / usr / src / contrib / perl-4.036 / doio.c
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9b7d628a
C		 1/* $RCSfile: doio.c,v $$Revision: 4.0.1.6 $$Date: 92/06/11 21:08:16 $
2 *
3 * Copyright (c) 1991, Larry Wall
4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
8 * $Log: doio.c,v $
9 * Revision 4.0.1.6 92/06/11 21:08:16 lwall
10 * patch34: some systems don't declare h_errno extern in header files
11 *
12 * Revision 4.0.1.5 92/06/08 13:00:21 lwall
13 * patch20: some machines don't define ENOTSOCK in errno.h
14 * patch20: new warnings for failed use of stat operators on filenames with \n
15 * patch20: wait failed when STDOUT or STDERR reopened to a pipe
16 * patch20: end of file latch not reset on reopen of STDIN
17 * patch20: seek(HANDLE, 0, 1) went to eof because of ancient Ultrix workaround
18 * patch20: fixed memory leak on system() for vfork() machines
19 * patch20: get*by* routines now return something useful in a scalar context
20 * patch20: h_errno now accessible via $?
21 *
22 * Revision 4.0.1.4 91/11/05 16:51:43 lwall
23 * patch11: prepared for ctype implementations that don't define isascii()
24 * patch11: perl mistook some streams for sockets because they return mode 0 too
25 * patch11: reopening STDIN, STDOUT and STDERR failed on some machines
26 * patch11: certain perl errors should set EBADF so that $! looks better
27 * patch11: truncate on a closed filehandle could dump
28 * patch11: stats of _ forgot whether prior stat was actually lstat
29 * patch11: -T returned true on NFS directory
30 *
31 * Revision 4.0.1.3 91/06/10 01:21:19 lwall
32 * patch10: read didn't work from character special files open for writing
33 * patch10: close-on-exec wrongly set on system file descriptors
34 *
35 * Revision 4.0.1.2 91/06/07 10:53:39 lwall
36 * patch4: new copyright notice
37 * patch4: system fd's are now treated specially
38 * patch4: added $^F variable to specify maximum system fd, default 2
39 * patch4: character special files now opened with bidirectional stdio buffers
40 * patch4: taintchecks could improperly modify parent in vfork()
41 * patch4: many, many itty-bitty portability fixes
42 *
43 * Revision 4.0.1.1 91/04/11 17:41:06 lwall
44 * patch1: hopefully straightened out some of the Xenix mess
45 *
46 * Revision 4.0 91/03/20 01:07:06 lwall
47 * 4.0 baseline.
48 *
49 */
50
51#include "EXTERN.h"
52#include "perl.h"
53
54#ifdef HAS_SOCKET
55#include <sys/socket.h>
56#include <netdb.h>
57#ifndef ENOTSOCK
58#include <net/errno.h>
59#endif
60#endif
61
62#ifdef HAS_SELECT
63#ifdef I_SYS_SELECT
64#ifndef I_SYS_TIME
65#include <sys/select.h>
66#endif
67#endif
68#endif
69
70#ifdef HOST_NOT_FOUND
71extern int h_errno;
72#endif
73
74#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
75#include <sys/ipc.h>
76#ifdef HAS_MSG
77#include <sys/msg.h>
78#endif
79#ifdef HAS_SEM
80#include <sys/sem.h>
81#endif
82#ifdef HAS_SHM
83#include <sys/shm.h>
84#endif
85#endif
86
87#ifdef I_PWD
88#include <pwd.h>
89#endif
90#ifdef I_GRP
91#include <grp.h>
92#endif
93#ifdef I_UTIME
94#include <utime.h>
95#endif
96#ifdef I_FCNTL
97#include <fcntl.h>
98#endif
99#ifdef I_SYS_FILE
100#include <sys/file.h>
101#endif
102
103int laststatval = -1;
104int laststype = O_STAT;
105
106static char* warn_nl = "Unsuccessful %s on filename containing newline";
107
108bool
109do_open(stab,name,len)
110STAB *stab;
111register char *name;
112int len;
113{
114 FILE *fp;
115 register STIO *stio = stab_io(stab);
116 char *myname = savestr(name);
117 int result;
118 int fd;
119 int writing = 0;
120 char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
121 FILE *saveifp = Nullfp;
122 FILE *saveofp = Nullfp;
123 char savetype = ' ';
124
125 mode[0] = mode[1] = mode[2] = '\0';
126 name = myname;
127 forkprocess = 1; /* assume true if no fork */
128 while (len && isSPACE(name[len-1]))
129 name[--len] = '\0';
130 if (!stio)
131 stio = stab_io(stab) = stio_new();
132 else if (stio->ifp) {
133 fd = fileno(stio->ifp);
134 if (stio->type == '-')
135 result = 0;
136 else if (fd <= maxsysfd) {
137 saveifp = stio->ifp;
138 saveofp = stio->ofp;
139 savetype = stio->type;
140 result = 0;
141 }
142 else if (stio->type == '|')
143 result = mypclose(stio->ifp);
144 else if (stio->ifp != stio->ofp) {
145 if (stio->ofp) {
146 result = fclose(stio->ofp);
147 fclose(stio->ifp); /* clear stdio, fd already closed */
148 }
149 else
150 result = fclose(stio->ifp);
151 }
152 else
153 result = fclose(stio->ifp);
154 if (result == EOF && fd > maxsysfd)
155 fprintf(stderr,"Warning: unable to close filehandle %s properly.\n",
156 stab_ename(stab));
157 stio->ofp = stio->ifp = Nullfp;
158 }
159 if (*name == '+' && len > 1 && name[len-1] != '|') { /* scary */
160 mode[1] = *name++;
161 mode[2] = '\0';
162 --len;
163 writing = 1;
164 }
165 else {
166 mode[1] = '\0';
167 }
168 stio->type = *name;
169 if (*name == '|') {
170 /*SUPPRESS 530*/
171 for (name++; isSPACE(*name); name++) ;
172#ifdef TAINT
173 taintenv();
174 taintproper("Insecure dependency in piped open");
175#endif
176 fp = mypopen(name,"w");
177 writing = 1;
178 }
179 else if (*name == '>') {
180#ifdef TAINT
181 taintproper("Insecure dependency in open");
182#endif
183 name++;
184 if (*name == '>') {
185 mode[0] = stio->type = 'a';
186 name++;
187 }
188 else
189 mode[0] = 'w';
190 writing = 1;
191 if (*name == '&') {
192 duplicity:
193 name++;
194 while (isSPACE(*name))
195 name++;
196 if (isDIGIT(*name))
197 fd = atoi(name);
198 else {
199 stab = stabent(name,FALSE);
200 if (!stab || !stab_io(stab)) {
201#ifdef EINVAL
202 errno = EINVAL;
203#endif
204 goto say_false;
205 }
206 if (stab_io(stab) && stab_io(stab)->ifp) {
207 fd = fileno(stab_io(stab)->ifp);
208 if (stab_io(stab)->type == 's')
209 stio->type = 's';
210 }
211 else
212 fd = -1;
213 }
214 if (!(fp = fdopen(fd = dup(fd),mode))) {
215 close(fd);
216 }
217 }
218 else {
219 while (isSPACE(*name))
220 name++;
221 if (strEQ(name,"-")) {
222 fp = stdout;
223 stio->type = '-';
224 }
225 else {
226 fp = fopen(name,mode);
227 }
228 }
229 }
230 else {
231 if (*name == '<') {
232 mode[0] = 'r';
233 name++;
234 while (isSPACE(*name))
235 name++;
236 if (*name == '&')
237 goto duplicity;
238 if (strEQ(name,"-")) {
239 fp = stdin;
240 stio->type = '-';
241 }
242 else
243 fp = fopen(name,mode);
244 }
245 else if (name[len-1] == '|') {
246#ifdef TAINT
247 taintenv();
248 taintproper("Insecure dependency in piped open");
249#endif
250 name[--len] = '\0';
251 while (len && isSPACE(name[len-1]))
252 name[--len] = '\0';
253 /*SUPPRESS 530*/
254 for (; isSPACE(*name); name++) ;
255 fp = mypopen(name,"r");
256 stio->type = '|';
257 }
258 else {
259 stio->type = '<';
260 /*SUPPRESS 530*/
261 for (; isSPACE(*name); name++) ;
262 if (strEQ(name,"-")) {
263 fp = stdin;
264 stio->type = '-';
265 }
266 else
267 fp = fopen(name,"r");
268 }
269 }
270 if (!fp) {
271 if (dowarn && stio->type == '<' && index(name, '\n'))
272 warn(warn_nl, "open");
273 Safefree(myname);
274 goto say_false;
275 }
276 Safefree(myname);
277 if (stio->type &&
278 stio->type != '|' && stio->type != '-') {
279 if (fstat(fileno(fp),&statbuf) < 0) {
280 (void)fclose(fp);
281 goto say_false;
282 }
283 if (S_ISSOCK(statbuf.st_mode))
284 stio->type = 's'; /* in case a socket was passed in to us */
285#ifdef HAS_SOCKET
286 else if (
287#ifdef S_IFMT
288 !(statbuf.st_mode & S_IFMT)
289#else
290 !statbuf.st_mode
291#endif
292 ) {
293 int buflen = sizeof tokenbuf;
294 if (getsockname(fileno(fp), tokenbuf, &buflen) >= 0
295 || errno != ENOTSOCK)
296 stio->type = 's'; /* some OS's return 0 on fstat()ed socket */
297 /* but some return 0 for streams too, sigh */
298 }
299#endif
300 }
301 if (saveifp) { /* must use old fp? */
302 fd = fileno(saveifp);
303 if (saveofp) {
304 fflush(saveofp); /* emulate fclose() */
305 if (saveofp != saveifp) { /* was a socket? */
306 fclose(saveofp);
307 if (fd > 2)
308 Safefree(saveofp);
309 }
310 }
311 if (fd != fileno(fp)) {
312 int pid;
313 STR *str;
314
315 dup2(fileno(fp), fd);
316 str = afetch(fdpid,fileno(fp),TRUE);
317 pid = str->str_u.str_useful;
318 str->str_u.str_useful = 0;
319 str = afetch(fdpid,fd,TRUE);
320 str->str_u.str_useful = pid;
321 fclose(fp);
322
323 }
324 fp = saveifp;
325 clearerr(fp);
326 }
327#if defined(HAS_FCNTL) && defined(F_SETFD)
328 fd = fileno(fp);
329 fcntl(fd,F_SETFD,fd > maxsysfd);
330#endif
331 stio->ifp = fp;
332 if (writing) {
333 if (stio->type == 's'
334 || (stio->type == '>' && S_ISCHR(statbuf.st_mode)) ) {
335 if (!(stio->ofp = fdopen(fileno(fp),"w"))) {
336 fclose(fp);
337 stio->ifp = Nullfp;
338 goto say_false;
339 }
340 }
341 else
342 stio->ofp = fp;
343 }
344 return TRUE;
345
346say_false:
347 stio->ifp = saveifp;
348 stio->ofp = saveofp;
349 stio->type = savetype;
350 return FALSE;
351}
352
353FILE *
354nextargv(stab)
355register STAB *stab;
356{
357 register STR *str;
358#ifndef FLEXFILENAMES
359 int filedev;
360 int fileino;
361#endif
362 int fileuid;
363 int filegid;
364 static int filemode = 0;
365 static int lastfd;
366 static char *oldname;
367
368 if (!argvoutstab)
369 argvoutstab = stabent("ARGVOUT",TRUE);
370 if (filemode & (S_ISUID|S_ISGID)) {
371 fflush(stab_io(argvoutstab)->ifp); /* chmod must follow last write */
372#ifdef HAS_FCHMOD
373 (void)fchmod(lastfd,filemode);
374#else
375 (void)chmod(oldname,filemode);
376#endif
377 }
378 filemode = 0;
379 while (alen(stab_xarray(stab)) >= 0) {
380 str = ashift(stab_xarray(stab));
381 str_sset(stab_val(stab),str);
382 STABSET(stab_val(stab));
383 oldname = str_get(stab_val(stab));
384 if (do_open(stab,oldname,stab_val(stab)->str_cur)) {
385 if (inplace) {
386#ifdef TAINT
387 taintproper("Insecure dependency in inplace open");
388#endif
389 if (strEQ(oldname,"-")) {
390 str_free(str);
391 defoutstab = stabent("STDOUT",TRUE);
392 return stab_io(stab)->ifp;
393 }
394#ifndef FLEXFILENAMES
395 filedev = statbuf.st_dev;
396 fileino = statbuf.st_ino;
397#endif
398 filemode = statbuf.st_mode;
399 fileuid = statbuf.st_uid;
400 filegid = statbuf.st_gid;
401 if (!S_ISREG(filemode)) {
402 warn("Can't do inplace edit: %s is not a regular file",
403 oldname );
404 do_close(stab,FALSE);
405 str_free(str);
406 continue;
407 }
408 if (*inplace) {
409#ifdef SUFFIX
410 add_suffix(str,inplace);
411#else
412 str_cat(str,inplace);
413#endif
414#ifndef FLEXFILENAMES
415 if (stat(str->str_ptr,&statbuf) >= 0
416 && statbuf.st_dev == filedev
417 && statbuf.st_ino == fileino ) {
418 warn("Can't do inplace edit: %s > 14 characters",
419 str->str_ptr );
420 do_close(stab,FALSE);
421 str_free(str);
422 continue;
423 }
424#endif
425#ifdef HAS_RENAME
426#ifndef DOSISH
427 if (rename(oldname,str->str_ptr) < 0) {
428 warn("Can't rename %s to %s: %s, skipping file",
429 oldname, str->str_ptr, strerror(errno) );
430 do_close(stab,FALSE);
431 str_free(str);
432 continue;
433 }
434#else
435 do_close(stab,FALSE);
436 (void)unlink(str->str_ptr);
437 (void)rename(oldname,str->str_ptr);
438 do_open(stab,str->str_ptr,stab_val(stab)->str_cur);
439#endif /* MSDOS */
440#else
441 (void)UNLINK(str->str_ptr);
442 if (link(oldname,str->str_ptr) < 0) {
443 warn("Can't rename %s to %s: %s, skipping file",
444 oldname, str->str_ptr, strerror(errno) );
445 do_close(stab,FALSE);
446 str_free(str);
447 continue;
448 }
449 (void)UNLINK(oldname);
450#endif
451 }
452 else {
453#ifndef DOSISH
454 if (UNLINK(oldname) < 0) {
455 warn("Can't rename %s to %s: %s, skipping file",
456 oldname, str->str_ptr, strerror(errno) );
457 do_close(stab,FALSE);
458 str_free(str);
459 continue;
460 }
461#else
462 fatal("Can't do inplace edit without backup");
463#endif
464 }
465
466 str_nset(str,">",1);
467 str_cat(str,oldname);
468 errno = 0; /* in case sprintf set errno */
469 if (!do_open(argvoutstab,str->str_ptr,str->str_cur)) {
470 warn("Can't do inplace edit on %s: %s",
471 oldname, strerror(errno) );
472 do_close(stab,FALSE);
473 str_free(str);
474 continue;
475 }
476 defoutstab = argvoutstab;
477 lastfd = fileno(stab_io(argvoutstab)->ifp);
478 (void)fstat(lastfd,&statbuf);
479#ifdef HAS_FCHMOD
480 (void)fchmod(lastfd,filemode);
481#else
482 (void)chmod(oldname,filemode);
483#endif
484 if (fileuid != statbuf.st_uid || filegid != statbuf.st_gid) {
485#ifdef HAS_FCHOWN
486 (void)fchown(lastfd,fileuid,filegid);
487#else
488#ifdef HAS_CHOWN
489 (void)chown(oldname,fileuid,filegid);
490#endif
491#endif
492 }
493 }
494 str_free(str);
495 return stab_io(stab)->ifp;
496 }
497 else
498 fprintf(stderr,"Can't open %s: %s\n",str_get(str), strerror(errno));
499 str_free(str);
500 }
501 if (inplace) {
502 (void)do_close(argvoutstab,FALSE);
503 defoutstab = stabent("STDOUT",TRUE);
504 }
505 return Nullfp;
506}
507
508#ifdef HAS_PIPE
509void
510do_pipe(str, rstab, wstab)
511STR *str;
512STAB *rstab;
513STAB *wstab;
514{
515 register STIO *rstio;
516 register STIO *wstio;
517 int fd[2];
518
519 if (!rstab)
520 goto badexit;
521 if (!wstab)
522 goto badexit;
523
524 rstio = stab_io(rstab);
525 wstio = stab_io(wstab);
526
527 if (!rstio)
528 rstio = stab_io(rstab) = stio_new();
529 else if (rstio->ifp)
530 do_close(rstab,FALSE);
531 if (!wstio)
532 wstio = stab_io(wstab) = stio_new();
533 else if (wstio->ifp)
534 do_close(wstab,FALSE);
535
536 if (pipe(fd) < 0)
537 goto badexit;
538 rstio->ifp = fdopen(fd[0], "r");
539 wstio->ofp = fdopen(fd[1], "w");
540 wstio->ifp = wstio->ofp;
541 rstio->type = '<';
542 wstio->type = '>';
543 if (!rstio->ifp || !wstio->ofp) {
544 if (rstio->ifp) fclose(rstio->ifp);
545 else close(fd[0]);
546 if (wstio->ofp) fclose(wstio->ofp);
547 else close(fd[1]);
548 goto badexit;
549 }
550
551 str_sset(str,&str_yes);
552 return;
553
554badexit:
555 str_sset(str,&str_undef);
556 return;
557}
558#endif
559
560bool
561do_close(stab,explicit)
562STAB *stab;
563bool explicit;
564{
565 bool retval = FALSE;
566 register STIO *stio;
567 int status;
568
569 if (!stab)
570 stab = argvstab;
571 if (!stab) {
572 errno = EBADF;
573 return FALSE;
574 }
575 stio = stab_io(stab);
576 if (!stio) { /* never opened */
577 if (dowarn && explicit)
578 warn("Close on unopened file <%s>",stab_ename(stab));
579 return FALSE;
580 }
581 if (stio->ifp) {
582 if (stio->type == '|') {
583 status = mypclose(stio->ifp);
584 retval = (status == 0);
585 statusvalue = (unsigned short)status & 0xffff;
586 }
587 else if (stio->type == '-')
588 retval = TRUE;
589 else {
590 if (stio->ofp && stio->ofp != stio->ifp) { /* a socket */
591 retval = (fclose(stio->ofp) != EOF);
592 fclose(stio->ifp); /* clear stdio, fd already closed */
593 }
594 else
595 retval = (fclose(stio->ifp) != EOF);
596 }
597 stio->ofp = stio->ifp = Nullfp;
598 }
599 if (explicit)
600 stio->lines = 0;
601 stio->type = ' ';
602 return retval;
603}
604
605bool
606do_eof(stab)
607STAB *stab;
608{
609 register STIO *stio;
610 int ch;
611
612 if (!stab) { /* eof() */
613 if (argvstab)
614 stio = stab_io(argvstab);
615 else
616 return TRUE;
617 }
618 else
619 stio = stab_io(stab);
620
621 if (!stio)
622 return TRUE;
623
624 while (stio->ifp) {
625
626#ifdef STDSTDIO /* (the code works without this) */
627 if (stio->ifp->_cnt > 0) /* cheat a little, since */
628 return FALSE; /* this is the most usual case */
629#endif
630
631 ch = getc(stio->ifp);
632 if (ch != EOF) {
633 (void)ungetc(ch, stio->ifp);
634 return FALSE;
635 }
636#ifdef STDSTDIO
637 if (stio->ifp->_cnt < -1)
638 stio->ifp->_cnt = -1;
639#endif
640 if (!stab) { /* not necessarily a real EOF yet? */
641 if (!nextargv(argvstab)) /* get another fp handy */
642 return TRUE;
643 }
644 else
645 return TRUE; /* normal fp, definitely end of file */
646 }
647 return TRUE;
648}
649
650long
651do_tell(stab)
652STAB *stab;
653{
654 register STIO *stio;
655
656 if (!stab)
657 goto phooey;
658
659 stio = stab_io(stab);
660 if (!stio || !stio->ifp)
661 goto phooey;
662
663#ifdef ULTRIX_STDIO_BOTCH
664 if (feof(stio->ifp))
665 (void)fseek (stio->ifp, 0L, 2); /* ultrix 1.2 workaround */
666#endif
667
668 return ftell(stio->ifp);
669
670phooey:
671 if (dowarn)
672 warn("tell() on unopened file");
673 errno = EBADF;
674 return -1L;
675}
676
677bool
678do_seek(stab, pos, whence)
679STAB *stab;
680long pos;
681int whence;
682{
683 register STIO *stio;
684
685 if (!stab)
686 goto nuts;
687
688 stio = stab_io(stab);
689 if (!stio || !stio->ifp)
690 goto nuts;
691
692#ifdef ULTRIX_STDIO_BOTCH
693 if (feof(stio->ifp))
694 (void)fseek (stio->ifp, 0L, 2); /* ultrix 1.2 workaround */
695#endif
696
697 return fseek(stio->ifp, pos, whence) >= 0;
698
699nuts:
700 if (dowarn)
701 warn("seek() on unopened file");
702 errno = EBADF;
703 return FALSE;
704}
705
706int
707do_ctl(optype,stab,func,argstr)
708int optype;
709STAB *stab;
710int func;
711STR *argstr;
712{
713 register STIO *stio;
714 register char *s;
715 int retval;
716
717 if (!stab || !argstr || !(stio = stab_io(stab)) || !stio->ifp) {
718 errno = EBADF; /* well, sort of... */
719 return -1;
720 }
721
722 if (argstr->str_pok || !argstr->str_nok) {
723 if (!argstr->str_pok)
724 s = str_get(argstr);
725
726#ifdef IOCPARM_MASK
727#ifndef IOCPARM_LEN
728#define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
729#endif
730#endif
731#ifdef IOCPARM_LEN
732 retval = IOCPARM_LEN(func); /* on BSDish systes we're safe */
733#else
734 retval = 256; /* otherwise guess at what's safe */
735#endif
736 if (argstr->str_cur < retval) {
737 Str_Grow(argstr,retval+1);
738 argstr->str_cur = retval;
739 }
740
741 s = argstr->str_ptr;
742 s[argstr->str_cur] = 17; /* a little sanity check here */
743 }
744 else {
745 retval = (int)str_gnum(argstr);
746#ifdef DOSISH
747 s = (char*)(long)retval; /* ouch */
748#else
749 s = (char*)retval; /* ouch */
750#endif
751 }
752
753#ifndef lint
754 if (optype == O_IOCTL)
755 retval = ioctl(fileno(stio->ifp), func, s);
756 else
757#ifdef DOSISH
758 fatal("fcntl is not implemented");
759#else
760#ifdef HAS_FCNTL
761 retval = fcntl(fileno(stio->ifp), func, s);
762#else
763 fatal("fcntl is not implemented");
764#endif
765#endif
766#else /* lint */
767 retval = 0;
768#endif /* lint */
769
770 if (argstr->str_pok) {
771 if (s[argstr->str_cur] != 17)
772 fatal("Return value overflowed string");
773 s[argstr->str_cur] = 0; /* put our null back */
774 }
775 return retval;
776}
777
778int
779do_stat(str,arg,gimme,arglast)
780STR *str;
781register ARG *arg;
782int gimme;
783int *arglast;
784{
785 register ARRAY *ary = stack;
786 register int sp = arglast[0] + 1;
787 int max = 13;
788
789 if ((arg[1].arg_type & A_MASK) == A_WORD) {
790 tmpstab = arg[1].arg_ptr.arg_stab;
791 if (tmpstab != defstab) {
792 laststype = O_STAT;
793 statstab = tmpstab;
794 str_set(statname,"");
795 if (!stab_io(tmpstab) || !stab_io(tmpstab)->ifp ||
796 fstat(fileno(stab_io(tmpstab)->ifp),&statcache) < 0) {
797 max = 0;
798 laststatval = -1;
799 }
800 }
801 else if (laststatval < 0)
802 max = 0;
803 }
804 else {
805 str_set(statname,str_get(ary->ary_array[sp]));
806 statstab = Nullstab;
807#ifdef HAS_LSTAT
808 laststype = arg->arg_type;
809 if (arg->arg_type == O_LSTAT)
810 laststatval = lstat(str_get(statname),&statcache);
811 else
812#endif
813 laststatval = stat(str_get(statname),&statcache);
814 if (laststatval < 0) {
815 if (dowarn && index(str_get(statname), '\n'))
816 warn(warn_nl, "stat");
817 max = 0;
818 }
819 }
820
821 if (gimme != G_ARRAY) {
822 if (max)
823 str_sset(str,&str_yes);
824 else
825 str_sset(str,&str_undef);
826 STABSET(str);
827 ary->ary_array[sp] = str;
828 return sp;
829 }
830 sp--;
831 if (max) {
832#ifndef lint
833 (void)astore(ary,++sp,
834 str_2mortal(str_nmake((double)statcache.st_dev)));
835 (void)astore(ary,++sp,
836 str_2mortal(str_nmake((double)statcache.st_ino)));
837 (void)astore(ary,++sp,
838 str_2mortal(str_nmake((double)statcache.st_mode)));
839 (void)astore(ary,++sp,
840 str_2mortal(str_nmake((double)statcache.st_nlink)));
841 (void)astore(ary,++sp,
842 str_2mortal(str_nmake((double)statcache.st_uid)));
843 (void)astore(ary,++sp,
844 str_2mortal(str_nmake((double)statcache.st_gid)));
845 (void)astore(ary,++sp,
846 str_2mortal(str_nmake((double)statcache.st_rdev)));
847 (void)astore(ary,++sp,
848 str_2mortal(str_nmake((double)statcache.st_size)));
849 (void)astore(ary,++sp,
850 str_2mortal(str_nmake((double)statcache.st_atime)));
851 (void)astore(ary,++sp,
852 str_2mortal(str_nmake((double)statcache.st_mtime)));
853 (void)astore(ary,++sp,
854 str_2mortal(str_nmake((double)statcache.st_ctime)));
855#ifdef STATBLOCKS
856 (void)astore(ary,++sp,
857 str_2mortal(str_nmake((double)statcache.st_blksize)));
858 (void)astore(ary,++sp,
859 str_2mortal(str_nmake((double)statcache.st_blocks)));
860#else
861 (void)astore(ary,++sp,
862 str_2mortal(str_make("",0)));
863 (void)astore(ary,++sp,
864 str_2mortal(str_make("",0)));
865#endif
866#else /* lint */
867 (void)astore(ary,++sp,str_nmake(0.0));
868#endif /* lint */
869 }
870 return sp;
871}
872
873#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
874 /* code courtesy of William Kucharski */
875#define HAS_CHSIZE
876
877int chsize(fd, length)
878int fd; /* file descriptor */
879off_t length; /* length to set file to */
880{
881 extern long lseek();
882 struct flock fl;
883 struct stat filebuf;
884
885 if (fstat(fd, &filebuf) < 0)
886 return -1;
887
888 if (filebuf.st_size < length) {
889
890 /* extend file length */
891
892 if ((lseek(fd, (length - 1), 0)) < 0)
893 return -1;
894
895 /* write a "0" byte */
896
897 if ((write(fd, "", 1)) != 1)
898 return -1;
899 }
900 else {
901 /* truncate length */
902
903 fl.l_whence = 0;
904 fl.l_len = 0;
905 fl.l_start = length;
906 fl.l_type = F_WRLCK; /* write lock on file space */
907
908 /*
909 * This relies on the UNDOCUMENTED F_FREESP argument to
910 * fcntl(2), which truncates the file so that it ends at the
911 * position indicated by fl.l_start.
912 *
913 * Will minor miracles never cease?
914 */
915
916 if (fcntl(fd, F_FREESP, &fl) < 0)
917 return -1;
918
919 }
920
921 return 0;
922}
923#endif /* F_FREESP */
924
925int /*SUPPRESS 590*/
926do_truncate(str,arg,gimme,arglast)
927STR *str;
928register ARG *arg;
929int gimme;
930int *arglast;
931{
932 register ARRAY *ary = stack;
933 register int sp = arglast[0] + 1;
934 off_t len = (off_t)str_gnum(ary->ary_array[sp+1]);
935 int result = 1;
936 STAB *tmpstab;
937
938#if defined(HAS_TRUNCATE) || defined(HAS_CHSIZE)
939#ifdef HAS_TRUNCATE
940 if ((arg[1].arg_type & A_MASK) == A_WORD) {
941 tmpstab = arg[1].arg_ptr.arg_stab;
942 if (!stab_io(tmpstab) || !stab_io(tmpstab)->ifp ||
943 ftruncate(fileno(stab_io(tmpstab)->ifp), len) < 0)
944 result = 0;
945 }
946 else if (truncate(str_get(ary->ary_array[sp]), len) < 0)
947 result = 0;
948#else
949 if ((arg[1].arg_type & A_MASK) == A_WORD) {
950 tmpstab = arg[1].arg_ptr.arg_stab;
951 if (!stab_io(tmpstab) || !stab_io(tmpstab)->ifp ||
952 chsize(fileno(stab_io(tmpstab)->ifp), len) < 0)
953 result = 0;
954 }
955 else {
956 int tmpfd;
957
958 if ((tmpfd = open(str_get(ary->ary_array[sp]), 0)) < 0)
959 result = 0;
960 else {
961 if (chsize(tmpfd, len) < 0)
962 result = 0;
963 close(tmpfd);
964 }
965 }
966#endif
967
968 if (result)
969 str_sset(str,&str_yes);
970 else
971 str_sset(str,&str_undef);
972 STABSET(str);
973 ary->ary_array[sp] = str;
974 return sp;
975#else
976 fatal("truncate not implemented");
977#endif
978}
979
980int
981looks_like_number(str)
982STR *str;
983{
984 register char *s;
985 register char *send;
986
987 if (!str->str_pok)
988 return TRUE;
989 s = str->str_ptr;
990 send = s + str->str_cur;
991 while (isSPACE(*s))
992 s++;
993 if (s >= send)
994 return FALSE;
995 if (*s == '+' || *s == '-')
996 s++;
997 while (isDIGIT(*s))
998 s++;
999 if (s == send)
1000 return TRUE;
1001 if (*s == '.')
1002 s++;
1003 else if (s == str->str_ptr)
1004 return FALSE;
1005 while (isDIGIT(*s))
1006 s++;
1007 if (s == send)
1008 return TRUE;
1009 if (*s == 'e' || *s == 'E') {
1010 s++;
1011 if (*s == '+' || *s == '-')
1012 s++;
1013 while (isDIGIT(*s))
1014 s++;
1015 }
1016 while (isSPACE(*s))
1017 s++;
1018 if (s >= send)
1019 return TRUE;
1020 return FALSE;
1021}
1022
1023bool
1024do_print(str,fp)
1025register STR *str;
1026FILE *fp;
1027{
1028 register char *tmps;
1029
1030 if (!fp) {
1031 if (dowarn)
1032 warn("print to unopened file");
1033 errno = EBADF;
1034 return FALSE;
1035 }
1036 if (!str)
1037 return TRUE;
1038 if (ofmt &&
1039 ((str->str_nok && str->str_u.str_nval != 0.0)
1040 || (looks_like_number(str) && str_gnum(str) != 0.0) ) ) {
1041 fprintf(fp, ofmt, str->str_u.str_nval);
1042 return !ferror(fp);
1043 }
1044 else {
1045 tmps = str_get(str);
1046 if (*tmps == 'S' && tmps[1] == 't' && tmps[2] == 'B' && tmps[3] == '\0'
1047 && str->str_cur == sizeof(STBP) && strlen(tmps) < str->str_cur) {
1048 STR *tmpstr = str_mortal(&str_undef);
1049 stab_efullname(tmpstr,((STAB*)str));/* a stab value, be nice */
1050 str = tmpstr;
1051 tmps = str->str_ptr;
1052 putc('*',fp);
1053 }
1054 if (str->str_cur && (fwrite(tmps,1,str->str_cur,fp) == 0 || ferror(fp)))
1055 return FALSE;
1056 }
1057 return TRUE;
1058}
1059
1060bool
1061do_aprint(arg,fp,arglast)
1062register ARG *arg;
1063register FILE *fp;
1064int *arglast;
1065{
1066 register STR **st = stack->ary_array;
1067 register int sp = arglast[1];
1068 register int retval;
1069 register int items = arglast[2] - sp;
1070
1071 if (!fp) {
1072 if (dowarn)
1073 warn("print to unopened file");
1074 errno = EBADF;
1075 return FALSE;
1076 }
1077 st += ++sp;
1078 if (arg->arg_type == O_PRTF) {
1079 do_sprintf(arg->arg_ptr.arg_str,items,st);
1080 retval = do_print(arg->arg_ptr.arg_str,fp);
1081 }
1082 else {
1083 retval = (items <= 0);
1084 for (; items > 0; items--,st++) {
1085 if (retval && ofslen) {
1086 if (fwrite(ofs, 1, ofslen, fp) == 0 || ferror(fp)) {
1087 retval = FALSE;
1088 break;
1089 }
1090 }
1091 if (!(retval = do_print(*st, fp)))
1092 break;
1093 }
1094 if (retval && orslen)
1095 if (fwrite(ors, 1, orslen, fp) == 0 || ferror(fp))
1096 retval = FALSE;
1097 }
1098 return retval;
1099}
1100
1101int
1102mystat(arg,str)
1103ARG *arg;
1104STR *str;
1105{
1106 STIO *stio;
1107
1108 if (arg[1].arg_type & A_DONT) {
1109 stio = stab_io(arg[1].arg_ptr.arg_stab);
1110 if (stio && stio->ifp) {
1111 statstab = arg[1].arg_ptr.arg_stab;
1112 str_set(statname,"");
1113 laststype = O_STAT;
1114 return (laststatval = fstat(fileno(stio->ifp), &statcache));
1115 }
1116 else {
1117 if (arg[1].arg_ptr.arg_stab == defstab)
1118 return laststatval;
1119 if (dowarn)
1120 warn("Stat on unopened file <%s>",
1121 stab_ename(arg[1].arg_ptr.arg_stab));
1122 statstab = Nullstab;
1123 str_set(statname,"");
1124 return (laststatval = -1);
1125 }
1126 }
1127 else {
1128 statstab = Nullstab;
1129 str_set(statname,str_get(str));
1130 laststype = O_STAT;
1131 laststatval = stat(str_get(str),&statcache);
1132 if (laststatval < 0 && dowarn && index(str_get(str), '\n'))
1133 warn(warn_nl, "stat");
1134 return laststatval;
1135 }
1136}
1137
1138int
1139mylstat(arg,str)
1140ARG *arg;
1141STR *str;
1142{
1143 if (arg[1].arg_type & A_DONT) {
1144 if (arg[1].arg_ptr.arg_stab == defstab) {
1145 if (laststype != O_LSTAT)
1146 fatal("The stat preceding -l _ wasn't an lstat");
1147 return laststatval;
1148 }
1149 fatal("You can't use -l on a filehandle");
1150 }
1151
1152 laststype = O_LSTAT;
1153 statstab = Nullstab;
1154 str_set(statname,str_get(str));
1155#ifdef HAS_LSTAT
1156 laststatval = lstat(str_get(str),&statcache);
1157#else
1158 laststatval = stat(str_get(str),&statcache);
1159#endif
1160 if (laststatval < 0 && dowarn && index(str_get(str), '\n'))
1161 warn(warn_nl, "lstat");
1162 return laststatval;
1163}
1164
1165STR *
1166do_fttext(arg,str)
1167register ARG *arg;
1168STR *str;
1169{
1170 int i;
1171 int len;
1172 int odd = 0;
1173 STDCHAR tbuf[512];
1174 register STDCHAR *s;
1175 register STIO *stio;
1176
1177 if (arg[1].arg_type & A_DONT) {
1178 if (arg[1].arg_ptr.arg_stab == defstab) {
1179 if (statstab)
1180 stio = stab_io(statstab);
1181 else {
1182 str = statname;
1183 goto really_filename;
1184 }
1185 }
1186 else {
1187 statstab = arg[1].arg_ptr.arg_stab;
1188 str_set(statname,"");
1189 stio = stab_io(statstab);
1190 }
1191 if (stio && stio->ifp) {
1192#if defined(STDSTDIO) || defined(atarist) /* this will work with atariST */
1193 fstat(fileno(stio->ifp),&statcache);
1194 if (S_ISDIR(statcache.st_mode)) /* handle NFS glitch */
1195 return arg->arg_type == O_FTTEXT ? &str_no : &str_yes;
1196 if (stio->ifp->_cnt <= 0) {
1197 i = getc(stio->ifp);
1198 if (i != EOF)
1199 (void)ungetc(i,stio->ifp);
1200 }
1201 if (stio->ifp->_cnt <= 0) /* null file is anything */
1202 return &str_yes;
1203 len = stio->ifp->_cnt + (stio->ifp->_ptr - stio->ifp->_base);
1204 s = stio->ifp->_base;
1205#else
1206 fatal("-T and -B not implemented on filehandles");
1207#endif
1208 }
1209 else {
1210 if (dowarn)
1211 warn("Test on unopened file <%s>",
1212 stab_ename(arg[1].arg_ptr.arg_stab));
1213 errno = EBADF;
1214 return &str_undef;
1215 }
1216 }
1217 else {
1218 statstab = Nullstab;
1219 str_set(statname,str_get(str));
1220 really_filename:
1221 i = open(str_get(str),0);
1222 if (i < 0) {
1223 if (dowarn && index(str_get(str), '\n'))
1224 warn(warn_nl, "open");
1225 return &str_undef;
1226 }
1227 fstat(i,&statcache);
1228 len = read(i,tbuf,512);
1229 (void)close(i);
1230 if (len <= 0) {
1231 if (S_ISDIR(statcache.st_mode) && arg->arg_type == O_FTTEXT)
1232 return &str_no; /* special case NFS directories */
1233 return &str_yes; /* null file is anything */
1234 }
1235 s = tbuf;
1236 }
1237
1238 /* now scan s to look for textiness */
1239
1240 for (i = 0; i < len; i++,s++) {
1241 if (!*s) { /* null never allowed in text */
1242 odd += len;
1243 break;
1244 }
1245 else if (*s & 128)
1246 odd++;
1247 else if (*s < 32 &&
1248 *s != '\n' && *s != '\r' && *s != '\b' &&
1249 *s != '\t' && *s != '\f' && *s != 27)
1250 odd++;
1251 }
1252
1253 if ((odd * 10 > len) == (arg->arg_type == O_FTTEXT)) /* allow 10% odd */
1254 return &str_no;
1255 else
1256 return &str_yes;
1257}
1258
1259static char **Argv = Null(char **);
1260static char *Cmd = Nullch;
1261
1262bool
1263do_aexec(really,arglast)
1264STR *really;
1265int *arglast;
1266{
1267 register STR **st = stack->ary_array;
1268 register int sp = arglast[1];
1269 register int items = arglast[2] - sp;
1270 register char **a;
1271 char *tmps;
1272
1273 if (items) {
1274 New(401,Argv, items+1, char*);
1275 a = Argv;
1276 for (st += ++sp; items > 0; items--,st++) {
1277 if (*st)
1278 *a++ = str_get(*st);
1279 else
1280 *a++ = "";
1281 }
1282 *a = Nullch;
1283#ifdef TAINT
1284 if (*Argv[0] != '/') /* will execvp use PATH? */
1285 taintenv(); /* testing IFS here is overkill, probably */
1286#endif
1287 if (really && *(tmps = str_get(really)))
1288 execvp(tmps,Argv);
1289 else
1290 execvp(Argv[0],Argv);
1291 }
1292 do_execfree();
1293 return FALSE;
1294}
1295
1296void
1297do_execfree()
1298{
1299 if (Argv) {
1300 Safefree(Argv);
1301 Argv = Null(char **);
1302 }
1303 if (Cmd) {
1304 Safefree(Cmd);
1305 Cmd = Nullch;
1306 }
1307}
1308
1309bool
1310do_exec(cmd)
1311char *cmd;
1312{
1313 register char **a;
1314 register char *s;
1315 char flags[10];
1316
1317 /* save an extra exec if possible */
1318
1319#ifdef CSH
1320 if (strnEQ(cmd,cshname,cshlen) && strnEQ(cmd+cshlen," -c",3)) {
1321 strcpy(flags,"-c");
1322 s = cmd+cshlen+3;
1323 if (*s == 'f') {
1324 s++;
1325 strcat(flags,"f");
1326 }
1327 if (*s == ' ')
1328 s++;
1329 if (*s++ == '\'') {
1330 char *ncmd = s;
1331
1332 while (*s)
1333 s++;
1334 if (s[-1] == '\n')
1335 *--s = '\0';
1336 if (s[-1] == '\'') {
1337 *--s = '\0';
1338 execl(cshname,"csh", flags,ncmd,(char*)0);
1339 *s = '\'';
1340 return FALSE;
1341 }
1342 }
1343 }
1344#endif /* CSH */
1345
1346 /* see if there are shell metacharacters in it */
1347
1348 /*SUPPRESS 530*/
1349 for (s = cmd; *s && isALPHA(*s); s++) ; /* catch VAR=val gizmo */
1350 if (*s == '=')
1351 goto doshell;
1352 for (s = cmd; *s; s++) {
1353 if (*s != ' ' && !isALPHA(*s) && index("$&*(){}[]'\";\\|?<>~`\n",*s)) {
1354 if (*s == '\n' && !s[1]) {
1355 *s = '\0';
1356 break;
1357 }
1358 doshell:
1359 execl("/bin/sh","sh","-c",cmd,(char*)0);
1360 return FALSE;
1361 }
1362 }
1363 New(402,Argv, (s - cmd) / 2 + 2, char*);
1364 Cmd = nsavestr(cmd, s-cmd);
1365 a = Argv;
1366 for (s = Cmd; *s;) {
1367 while (*s && isSPACE(*s)) s++;
1368 if (*s)
1369 *(a++) = s;
1370 while (*s && !isSPACE(*s)) s++;
1371 if (*s)
1372 *s++ = '\0';
1373 }
1374 *a = Nullch;
1375 if (Argv[0]) {
1376 execvp(Argv[0],Argv);
1377 if (errno == ENOEXEC) { /* for system V NIH syndrome */
1378 do_execfree();
1379 goto doshell;
1380 }
1381 }
1382 do_execfree();
1383 return FALSE;
1384}
1385
1386#ifdef HAS_SOCKET
1387int
1388do_socket(stab, arglast)
1389STAB *stab;
1390int *arglast;
1391{
1392 register STR **st = stack->ary_array;
1393 register int sp = arglast[1];
1394 register STIO *stio;
1395 int domain, type, protocol, fd;
1396
1397 if (!stab) {
1398 errno = EBADF;
1399 return FALSE;
1400 }
1401
1402 stio = stab_io(stab);
1403 if (!stio)
1404 stio = stab_io(stab) = stio_new();
1405 else if (stio->ifp)
1406 do_close(stab,FALSE);
1407
1408 domain = (int)str_gnum(st[++sp]);
1409 type = (int)str_gnum(st[++sp]);
1410 protocol = (int)str_gnum(st[++sp]);
1411#ifdef TAINT
1412 taintproper("Insecure dependency in socket");
1413#endif
1414 fd = socket(domain,type,protocol);
1415 if (fd < 0)
1416 return FALSE;
1417 stio->ifp = fdopen(fd, "r"); /* stdio gets confused about sockets */
1418 stio->ofp = fdopen(fd, "w");
1419 stio->type = 's';
1420 if (!stio->ifp || !stio->ofp) {
1421 if (stio->ifp) fclose(stio->ifp);
1422 if (stio->ofp) fclose(stio->ofp);
1423 if (!stio->ifp && !stio->ofp) close(fd);
1424 return FALSE;
1425 }
1426
1427 return TRUE;
1428}
1429
1430int
1431do_bind(stab, arglast)
1432STAB *stab;
1433int *arglast;
1434{
1435 register STR **st = stack->ary_array;
1436 register int sp = arglast[1];
1437 register STIO *stio;
1438 char *addr;
1439
1440 if (!stab)
1441 goto nuts;
1442
1443 stio = stab_io(stab);
1444 if (!stio || !stio->ifp)
1445 goto nuts;
1446
1447 addr = str_get(st[++sp]);
1448#ifdef TAINT
1449 taintproper("Insecure dependency in bind");
1450#endif
1451 return bind(fileno(stio->ifp), addr, st[sp]->str_cur) >= 0;
1452
1453nuts:
1454 if (dowarn)
1455 warn("bind() on closed fd");
1456 errno = EBADF;
1457 return FALSE;
1458
1459}
1460
1461int
1462do_connect(stab, arglast)
1463STAB *stab;
1464int *arglast;
1465{
1466 register STR **st = stack->ary_array;
1467 register int sp = arglast[1];
1468 register STIO *stio;
1469 char *addr;
1470
1471 if (!stab)
1472 goto nuts;
1473
1474 stio = stab_io(stab);
1475 if (!stio || !stio->ifp)
1476 goto nuts;
1477
1478 addr = str_get(st[++sp]);
1479#ifdef TAINT
1480 taintproper("Insecure dependency in connect");
1481#endif
1482 return connect(fileno(stio->ifp), addr, st[sp]->str_cur) >= 0;
1483
1484nuts:
1485 if (dowarn)
1486 warn("connect() on closed fd");
1487 errno = EBADF;
1488 return FALSE;
1489
1490}
1491
1492int
1493do_listen(stab, arglast)
1494STAB *stab;
1495int *arglast;
1496{
1497 register STR **st = stack->ary_array;
1498 register int sp = arglast[1];
1499 register STIO *stio;
1500 int backlog;
1501
1502 if (!stab)
1503 goto nuts;
1504
1505 stio = stab_io(stab);
1506 if (!stio || !stio->ifp)
1507 goto nuts;
1508
1509 backlog = (int)str_gnum(st[++sp]);
1510 return listen(fileno(stio->ifp), backlog) >= 0;
1511
1512nuts:
1513 if (dowarn)
1514 warn("listen() on closed fd");
1515 errno = EBADF;
1516 return FALSE;
1517}
1518
1519void
1520do_accept(str, nstab, gstab)
1521STR *str;
1522STAB *nstab;
1523STAB *gstab;
1524{
1525 register STIO *nstio;
1526 register STIO *gstio;
1527 int len = sizeof buf;
1528 int fd;
1529
1530 if (!nstab)
1531 goto badexit;
1532 if (!gstab)
1533 goto nuts;
1534
1535 gstio = stab_io(gstab);
1536 nstio = stab_io(nstab);
1537
1538 if (!gstio || !gstio->ifp)
1539 goto nuts;
1540 if (!nstio)
1541 nstio = stab_io(nstab) = stio_new();
1542 else if (nstio->ifp)
1543 do_close(nstab,FALSE);
1544
1545 fd = accept(fileno(gstio->ifp),(struct sockaddr *)buf,&len);
1546 if (fd < 0)
1547 goto badexit;
1548 nstio->ifp = fdopen(fd, "r");
1549 nstio->ofp = fdopen(fd, "w");
1550 nstio->type = 's';
1551 if (!nstio->ifp || !nstio->ofp) {
1552 if (nstio->ifp) fclose(nstio->ifp);
1553 if (nstio->ofp) fclose(nstio->ofp);
1554 if (!nstio->ifp && !nstio->ofp) close(fd);
1555 goto badexit;
1556 }
1557
1558 str_nset(str, buf, len);
1559 return;
1560
1561nuts:
1562 if (dowarn)
1563 warn("accept() on closed fd");
1564 errno = EBADF;
1565badexit:
1566 str_sset(str,&str_undef);
1567 return;
1568}
1569
1570int
1571do_shutdown(stab, arglast)
1572STAB *stab;
1573int *arglast;
1574{
1575 register STR **st = stack->ary_array;
1576 register int sp = arglast[1];
1577 register STIO *stio;
1578 int how;
1579
1580 if (!stab)
1581 goto nuts;
1582
1583 stio = stab_io(stab);
1584 if (!stio || !stio->ifp)
1585 goto nuts;
1586
1587 how = (int)str_gnum(st[++sp]);
1588 return shutdown(fileno(stio->ifp), how) >= 0;
1589
1590nuts:
1591 if (dowarn)
1592 warn("shutdown() on closed fd");
1593 errno = EBADF;
1594 return FALSE;
1595
1596}
1597
1598int
1599do_sopt(optype, stab, arglast)
1600int optype;
1601STAB *stab;
1602int *arglast;
1603{
1604 register STR **st = stack->ary_array;
1605 register int sp = arglast[1];
1606 register STIO *stio;
1607 int fd;
1608 unsigned int lvl;
1609 unsigned int optname;
1610
1611 if (!stab)
1612 goto nuts;
1613
1614 stio = stab_io(stab);
1615 if (!stio || !stio->ifp)
1616 goto nuts;
1617
1618 fd = fileno(stio->ifp);
1619 lvl = (unsigned int)str_gnum(st[sp+1]);
1620 optname = (unsigned int)str_gnum(st[sp+2]);
1621 switch (optype) {
1622 case O_GSOCKOPT:
1623 st[sp] = str_2mortal(Str_new(22,257));
1624 st[sp]->str_cur = 256;
1625 st[sp]->str_pok = 1;
1626 if (getsockopt(fd, lvl, optname, st[sp]->str_ptr,
1627 (int*)&st[sp]->str_cur) < 0)
1628 goto nuts;
1629 break;
1630 case O_SSOCKOPT:
1631 st[sp] = st[sp+3];
1632 if (setsockopt(fd, lvl, optname, st[sp]->str_ptr, st[sp]->str_cur) < 0)
1633 goto nuts;
1634 st[sp] = &str_yes;
1635 break;
1636 }
1637
1638 return sp;
1639
1640nuts:
1641 if (dowarn)
1642 warn("[gs]etsockopt() on closed fd");
1643 st[sp] = &str_undef;
1644 errno = EBADF;
1645 return sp;
1646
1647}
1648
1649int
1650do_getsockname(optype, stab, arglast)
1651int optype;
1652STAB *stab;
1653int *arglast;
1654{
1655 register STR **st = stack->ary_array;
1656 register int sp = arglast[1];
1657 register STIO *stio;
1658 int fd;
1659
1660 if (!stab)
1661 goto nuts;
1662
1663 stio = stab_io(stab);
1664 if (!stio || !stio->ifp)
1665 goto nuts;
1666
1667 st[sp] = str_2mortal(Str_new(22,257));
1668 st[sp]->str_cur = 256;
1669 st[sp]->str_pok = 1;
1670 fd = fileno(stio->ifp);
1671 switch (optype) {
1672 case O_GETSOCKNAME:
1673 if (getsockname(fd, st[sp]->str_ptr, (int*)&st[sp]->str_cur) < 0)
1674 goto nuts2;
1675 break;
1676 case O_GETPEERNAME:
1677 if (getpeername(fd, st[sp]->str_ptr, (int*)&st[sp]->str_cur) < 0)
1678 goto nuts2;
1679 break;
1680 }
1681
1682 return sp;
1683
1684nuts:
1685 if (dowarn)
1686 warn("get{sock,peer}name() on closed fd");
1687 errno = EBADF;
1688nuts2:
1689 st[sp] = &str_undef;
1690 return sp;
1691
1692}
1693
1694int
1695do_ghent(which,gimme,arglast)
1696int which;
1697int gimme;
1698int *arglast;
1699{
1700 register ARRAY *ary = stack;
1701 register int sp = arglast[0];
1702 register char **elem;
1703 register STR *str;
1704 struct hostent *gethostbyname();
1705 struct hostent *gethostbyaddr();
1706#ifdef HAS_GETHOSTENT
1707 struct hostent *gethostent();
1708#endif
1709 struct hostent *hent;
1710 unsigned long len;
1711
1712 if (which == O_GHBYNAME) {
1713 char *name = str_get(ary->ary_array[sp+1]);
1714
1715 hent = gethostbyname(name);
1716 }
1717 else if (which == O_GHBYADDR) {
1718 STR *addrstr = ary->ary_array[sp+1];
1719 int addrtype = (int)str_gnum(ary->ary_array[sp+2]);
1720 char *addr = str_get(addrstr);
1721
1722 hent = gethostbyaddr(addr,addrstr->str_cur,addrtype);
1723 }
1724 else
1725#ifdef HAS_GETHOSTENT
1726 hent = gethostent();
1727#else
1728 fatal("gethostent not implemented");
1729#endif
1730
1731#ifdef HOST_NOT_FOUND
1732 if (!hent)
1733 statusvalue = (unsigned short)h_errno & 0xffff;
1734#endif
1735
1736 if (gimme != G_ARRAY) {
1737 astore(ary, ++sp, str = str_mortal(&str_undef));
1738 if (hent) {
1739 if (which == O_GHBYNAME) {
1740#ifdef h_addr
1741 str_nset(str, *hent->h_addr, hent->h_length);
1742#else
1743 str_nset(str, hent->h_addr, hent->h_length);
1744#endif
1745 }
1746 else
1747 str_set(str, hent->h_name);
1748 }
1749 return sp;
1750 }
1751
1752 if (hent) {
1753#ifndef lint
1754 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1755 str_set(str, hent->h_name);
1756 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1757 for (elem = hent->h_aliases; *elem; elem++) {
1758 str_cat(str, *elem);
1759 if (elem[1])
1760 str_ncat(str," ",1);
1761 }
1762 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1763 str_numset(str, (double)hent->h_addrtype);
1764 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1765 len = hent->h_length;
1766 str_numset(str, (double)len);
1767#ifdef h_addr
1768 for (elem = hent->h_addr_list; *elem; elem++) {
1769 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1770 str_nset(str, *elem, len);
1771 }
1772#else
1773 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1774 str_nset(str, hent->h_addr, len);
1775#endif /* h_addr */
1776#else /* lint */
1777 elem = Nullch;
1778 elem = elem;
1779 (void)astore(ary, ++sp, str_mortal(&str_no));
1780#endif /* lint */
1781 }
1782
1783 return sp;
1784}
1785
1786int
1787do_gnent(which,gimme,arglast)
1788int which;
1789int gimme;
1790int *arglast;
1791{
1792 register ARRAY *ary = stack;
1793 register int sp = arglast[0];
1794 register char **elem;
1795 register STR *str;
1796 struct netent *getnetbyname();
1797 struct netent *getnetbyaddr();
1798 struct netent *getnetent();
1799 struct netent *nent;
1800
1801 if (which == O_GNBYNAME) {
1802 char *name = str_get(ary->ary_array[sp+1]);
1803
1804 nent = getnetbyname(name);
1805 }
1806 else if (which == O_GNBYADDR) {
1807 unsigned long addr = U_L(str_gnum(ary->ary_array[sp+1]));
1808 int addrtype = (int)str_gnum(ary->ary_array[sp+2]);
1809
1810 nent = getnetbyaddr((long)addr,addrtype);
1811 }
1812 else
1813 nent = getnetent();
1814
1815 if (gimme != G_ARRAY) {
1816 astore(ary, ++sp, str = str_mortal(&str_undef));
1817 if (nent) {
1818 if (which == O_GNBYNAME)
1819 str_numset(str, (double)nent->n_net);
1820 else
1821 str_set(str, nent->n_name);
1822 }
1823 return sp;
1824 }
1825
1826 if (nent) {
1827#ifndef lint
1828 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1829 str_set(str, nent->n_name);
1830 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1831 for (elem = nent->n_aliases; *elem; elem++) {
1832 str_cat(str, *elem);
1833 if (elem[1])
1834 str_ncat(str," ",1);
1835 }
1836 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1837 str_numset(str, (double)nent->n_addrtype);
1838 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1839 str_numset(str, (double)nent->n_net);
1840#else /* lint */
1841 elem = Nullch;
1842 elem = elem;
1843 (void)astore(ary, ++sp, str_mortal(&str_no));
1844#endif /* lint */
1845 }
1846
1847 return sp;
1848}
1849
1850int
1851do_gpent(which,gimme,arglast)
1852int which;
1853int gimme;
1854int *arglast;
1855{
1856 register ARRAY *ary = stack;
1857 register int sp = arglast[0];
1858 register char **elem;
1859 register STR *str;
1860 struct protoent *getprotobyname();
1861 struct protoent *getprotobynumber();
1862 struct protoent *getprotoent();
1863 struct protoent *pent;
1864
1865 if (which == O_GPBYNAME) {
1866 char *name = str_get(ary->ary_array[sp+1]);
1867
1868 pent = getprotobyname(name);
1869 }
1870 else if (which == O_GPBYNUMBER) {
1871 int proto = (int)str_gnum(ary->ary_array[sp+1]);
1872
1873 pent = getprotobynumber(proto);
1874 }
1875 else
1876 pent = getprotoent();
1877
1878 if (gimme != G_ARRAY) {
1879 astore(ary, ++sp, str = str_mortal(&str_undef));
1880 if (pent) {
1881 if (which == O_GPBYNAME)
1882 str_numset(str, (double)pent->p_proto);
1883 else
1884 str_set(str, pent->p_name);
1885 }
1886 return sp;
1887 }
1888
1889 if (pent) {
1890#ifndef lint
1891 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1892 str_set(str, pent->p_name);
1893 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1894 for (elem = pent->p_aliases; *elem; elem++) {
1895 str_cat(str, *elem);
1896 if (elem[1])
1897 str_ncat(str," ",1);
1898 }
1899 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1900 str_numset(str, (double)pent->p_proto);
1901#else /* lint */
1902 elem = Nullch;
1903 elem = elem;
1904 (void)astore(ary, ++sp, str_mortal(&str_no));
1905#endif /* lint */
1906 }
1907
1908 return sp;
1909}
1910
1911int
1912do_gsent(which,gimme,arglast)
1913int which;
1914int gimme;
1915int *arglast;
1916{
1917 register ARRAY *ary = stack;
1918 register int sp = arglast[0];
1919 register char **elem;
1920 register STR *str;
1921 struct servent *getservbyname();
1922 struct servent *getservbynumber();
1923 struct servent *getservent();
1924 struct servent *sent;
1925
1926 if (which == O_GSBYNAME) {
1927 char *name = str_get(ary->ary_array[sp+1]);
1928 char *proto = str_get(ary->ary_array[sp+2]);
1929
1930 if (proto && !*proto)
1931 proto = Nullch;
1932
1933 sent = getservbyname(name,proto);
1934 }
1935 else if (which == O_GSBYPORT) {
1936 int port = (int)str_gnum(ary->ary_array[sp+1]);
1937 char *proto = str_get(ary->ary_array[sp+2]);
1938
1939 sent = getservbyport(port,proto);
1940 }
1941 else
1942 sent = getservent();
1943
1944 if (gimme != G_ARRAY) {
1945 astore(ary, ++sp, str = str_mortal(&str_undef));
1946 if (sent) {
1947 if (which == O_GSBYNAME) {
1948#ifdef HAS_NTOHS
1949 str_numset(str, (double)ntohs(sent->s_port));
1950#else
1951 str_numset(str, (double)(sent->s_port));
1952#endif
1953 }
1954 else
1955 str_set(str, sent->s_name);
1956 }
1957 return sp;
1958 }
1959
1960 if (sent) {
1961#ifndef lint
1962 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1963 str_set(str, sent->s_name);
1964 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1965 for (elem = sent->s_aliases; *elem; elem++) {
1966 str_cat(str, *elem);
1967 if (elem[1])
1968 str_ncat(str," ",1);
1969 }
1970 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1971#ifdef HAS_NTOHS
1972 str_numset(str, (double)ntohs(sent->s_port));
1973#else
1974 str_numset(str, (double)(sent->s_port));
1975#endif
1976 (void)astore(ary, ++sp, str = str_mortal(&str_no));
1977 str_set(str, sent->s_proto);
1978#else /* lint */
1979 elem = Nullch;
1980 elem = elem;
1981 (void)astore(ary, ++sp, str_mortal(&str_no));
1982#endif /* lint */
1983 }
1984
1985 return sp;
1986}
1987
1988#endif /* HAS_SOCKET */
1989
1990#ifdef HAS_SELECT
1991int
1992do_select(gimme,arglast)
1993int gimme;
1994int *arglast;
1995{
1996 register STR **st = stack->ary_array;
1997 register int sp = arglast[0];
1998 register int i;
1999 register int j;
2000 register char *s;
2001 register STR *str;
2002 double value;
2003 int maxlen = 0;
2004 int nfound;
2005 struct timeval timebuf;
2006 struct timeval *tbuf = &timebuf;
2007 int growsize;
2008#if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
2009 int masksize;
2010 int offset;
2011 char *fd_sets[4];
2012 int k;
2013
2014#if BYTEORDER & 0xf0000
2015#define ORDERBYTE (0x88888888 - BYTEORDER)
2016#else
2017#define ORDERBYTE (0x4444 - BYTEORDER)
2018#endif
2019
2020#endif
2021
2022 for (i = 1; i <= 3; i++) {
2023 j = st[sp+i]->str_cur;
2024 if (maxlen < j)
2025 maxlen = j;
2026 }
2027
2028#if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
2029 growsize = maxlen; /* little endians can use vecs directly */
2030#else
2031#ifdef NFDBITS
2032
2033#ifndef NBBY
2034#define NBBY 8
2035#endif
2036
2037 masksize = NFDBITS / NBBY;
2038#else
2039 masksize = sizeof(long); /* documented int, everyone seems to use long */
2040#endif
2041 growsize = maxlen + (masksize - (maxlen % masksize));
2042 Zero(&fd_sets[0], 4, char*);
2043#endif
2044
2045 for (i = 1; i <= 3; i++) {
2046 str = st[sp+i];
2047 j = str->str_len;
2048 if (j < growsize) {
2049 if (str->str_pok) {
2050 Str_Grow(str,growsize);
2051 s = str_get(str) + j;
2052 while (++j <= growsize) {
2053 *s++ = '\0';
2054 }
2055 }
2056 else if (str->str_ptr) {
2057 Safefree(str->str_ptr);
2058 str->str_ptr = Nullch;
2059 }
2060 }
2061#if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
2062 s = str->str_ptr;
2063 if (s) {
2064 New(403, fd_sets[i], growsize, char);
2065 for (offset = 0; offset < growsize; offset += masksize) {
2066 for (j = 0, k=ORDERBYTE; j < masksize; j++, (k >>= 4))
2067 fd_sets[i][j+offset] = s[(k % masksize) + offset];
2068 }
2069 }
2070#endif
2071 }
2072 str = st[sp+4];
2073 if (str->str_nok || str->str_pok) {
2074 value = str_gnum(str);
2075 if (value < 0.0)
2076 value = 0.0;
2077 timebuf.tv_sec = (long)value;
2078 value -= (double)timebuf.tv_sec;
2079 timebuf.tv_usec = (long)(value * 1000000.0);
2080 }
2081 else
2082 tbuf = Null(struct timeval*);
2083
2084#if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
2085 nfound = select(
2086 maxlen * 8,
2087 st[sp+1]->str_ptr,
2088 st[sp+2]->str_ptr,
2089 st[sp+3]->str_ptr,
2090 tbuf);
2091#else
2092 nfound = select(
2093 maxlen * 8,
2094 fd_sets[1],
2095 fd_sets[2],
2096 fd_sets[3],
2097 tbuf);
2098 for (i = 1; i <= 3; i++) {
2099 if (fd_sets[i]) {
2100 str = st[sp+i];
2101 s = str->str_ptr;
2102 for (offset = 0; offset < growsize; offset += masksize) {
2103 for (j = 0, k=ORDERBYTE; j < masksize; j++, (k >>= 4))
2104 s[(k % masksize) + offset] = fd_sets[i][j+offset];
2105 }
2106 Safefree(fd_sets[i]);
2107 }
2108 }
2109#endif
2110
2111 st[++sp] = str_mortal(&str_no);
2112 str_numset(st[sp], (double)nfound);
2113 if (gimme == G_ARRAY && tbuf) {
2114 value = (double)(timebuf.tv_sec) +
2115 (double)(timebuf.tv_usec) / 1000000.0;
2116 st[++sp] = str_mortal(&str_no);
2117 str_numset(st[sp], value);
2118 }
2119 return sp;
2120}
2121#endif /* SELECT */
2122
2123#ifdef HAS_SOCKET
2124int
2125do_spair(stab1, stab2, arglast)
2126STAB *stab1;
2127STAB *stab2;
2128int *arglast;
2129{
2130 register STR **st = stack->ary_array;
2131 register int sp = arglast[2];
2132 register STIO *stio1;
2133 register STIO *stio2;
2134 int domain, type, protocol, fd[2];
2135
2136 if (!stab1 || !stab2)
2137 return FALSE;
2138
2139 stio1 = stab_io(stab1);
2140 stio2 = stab_io(stab2);
2141 if (!stio1)
2142 stio1 = stab_io(stab1) = stio_new();
2143 else if (stio1->ifp)
2144 do_close(stab1,FALSE);
2145 if (!stio2)
2146 stio2 = stab_io(stab2) = stio_new();
2147 else if (stio2->ifp)
2148 do_close(stab2,FALSE);
2149
2150 domain = (int)str_gnum(st[++sp]);
2151 type = (int)str_gnum(st[++sp]);
2152 protocol = (int)str_gnum(st[++sp]);
2153#ifdef TAINT
2154 taintproper("Insecure dependency in socketpair");
2155#endif
2156#ifdef HAS_SOCKETPAIR
2157 if (socketpair(domain,type,protocol,fd) < 0)
2158 return FALSE;
2159#else
2160 fatal("Socketpair unimplemented");
2161#endif
2162 stio1->ifp = fdopen(fd[0], "r");
2163 stio1->ofp = fdopen(fd[0], "w");
2164 stio1->type = 's';
2165 stio2->ifp = fdopen(fd[1], "r");
2166 stio2->ofp = fdopen(fd[1], "w");
2167 stio2->type = 's';
2168 if (!stio1->ifp || !stio1->ofp || !stio2->ifp || !stio2->ofp) {
2169 if (stio1->ifp) fclose(stio1->ifp);
2170 if (stio1->ofp) fclose(stio1->ofp);
2171 if (!stio1->ifp && !stio1->ofp) close(fd[0]);
2172 if (stio2->ifp) fclose(stio2->ifp);
2173 if (stio2->ofp) fclose(stio2->ofp);
2174 if (!stio2->ifp && !stio2->ofp) close(fd[1]);
2175 return FALSE;
2176 }
2177
2178 return TRUE;
2179}
2180
2181#endif /* HAS_SOCKET */
2182
2183int
2184do_gpwent(which,gimme,arglast)
2185int which;
2186int gimme;
2187int *arglast;
2188{
2189#ifdef I_PWD
2190 register ARRAY *ary = stack;
2191 register int sp = arglast[0];
2192 register STR *str;
2193 struct passwd *getpwnam();
2194 struct passwd *getpwuid();
2195 struct passwd *getpwent();
2196 struct passwd *pwent;
2197
2198 if (which == O_GPWNAM) {
2199 char *name = str_get(ary->ary_array[sp+1]);
2200
2201 pwent = getpwnam(name);
2202 }
2203 else if (which == O_GPWUID) {
2204 int uid = (int)str_gnum(ary->ary_array[sp+1]);
2205
2206 pwent = getpwuid(uid);
2207 }
2208 else
2209 pwent = getpwent();
2210
2211 if (gimme != G_ARRAY) {
2212 astore(ary, ++sp, str = str_mortal(&str_undef));
2213 if (pwent) {
2214 if (which == O_GPWNAM)
2215 str_numset(str, (double)pwent->pw_uid);
2216 else
2217 str_set(str, pwent->pw_name);
2218 }
2219 return sp;
2220 }
2221
2222 if (pwent) {
2223 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2224 str_set(str, pwent->pw_name);
2225 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2226 str_set(str, pwent->pw_passwd);
2227 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2228 str_numset(str, (double)pwent->pw_uid);
2229 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2230 str_numset(str, (double)pwent->pw_gid);
2231 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2232#ifdef PWCHANGE
2233 str_numset(str, (double)pwent->pw_change);
2234#else
2235#ifdef PWQUOTA
2236 str_numset(str, (double)pwent->pw_quota);
2237#else
2238#ifdef PWAGE
2239 str_set(str, pwent->pw_age);
2240#endif
2241#endif
2242#endif
2243 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2244#ifdef PWCLASS
2245 str_set(str,pwent->pw_class);
2246#else
2247#ifdef PWCOMMENT
2248 str_set(str, pwent->pw_comment);
2249#endif
2250#endif
2251 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2252 str_set(str, pwent->pw_gecos);
2253 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2254 str_set(str, pwent->pw_dir);
2255 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2256 str_set(str, pwent->pw_shell);
2257#ifdef PWEXPIRE
2258 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2259 str_numset(str, (double)pwent->pw_expire);
2260#endif
2261 }
2262
2263 return sp;
2264#else
2265 fatal("password routines not implemented");
2266#endif
2267}
2268
2269int
2270do_ggrent(which,gimme,arglast)
2271int which;
2272int gimme;
2273int *arglast;
2274{
2275#ifdef I_GRP
2276 register ARRAY *ary = stack;
2277 register int sp = arglast[0];
2278 register char **elem;
2279 register STR *str;
2280 struct group *getgrnam();
2281 struct group *getgrgid();
2282 struct group *getgrent();
2283 struct group *grent;
2284
2285 if (which == O_GGRNAM) {
2286 char *name = str_get(ary->ary_array[sp+1]);
2287
2288 grent = getgrnam(name);
2289 }
2290 else if (which == O_GGRGID) {
2291 int gid = (int)str_gnum(ary->ary_array[sp+1]);
2292
2293 grent = getgrgid(gid);
2294 }
2295 else
2296 grent = getgrent();
2297
2298 if (gimme != G_ARRAY) {
2299 astore(ary, ++sp, str = str_mortal(&str_undef));
2300 if (grent) {
2301 if (which == O_GGRNAM)
2302 str_numset(str, (double)grent->gr_gid);
2303 else
2304 str_set(str, grent->gr_name);
2305 }
2306 return sp;
2307 }
2308
2309 if (grent) {
2310 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2311 str_set(str, grent->gr_name);
2312 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2313 str_set(str, grent->gr_passwd);
2314 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2315 str_numset(str, (double)grent->gr_gid);
2316 (void)astore(ary, ++sp, str = str_mortal(&str_no));
2317 for (elem = grent->gr_mem; *elem; elem++) {
2318 str_cat(str, *elem);
2319 if (elem[1])
2320 str_ncat(str," ",1);
2321 }
2322 }
2323
2324 return sp;
2325#else
2326 fatal("group routines not implemented");
2327#endif
2328}
2329
2330int
2331do_dirop(optype,stab,gimme,arglast)
2332int optype;
2333STAB *stab;
2334int gimme;
2335int *arglast;
2336{
2337#if defined(DIRENT) && defined(HAS_READDIR)
2338 register ARRAY *ary = stack;
2339 register STR **st = ary->ary_array;
2340 register int sp = arglast[1];
2341 register STIO *stio;
2342 long along;
2343#ifndef apollo
2344 struct DIRENT *readdir();
2345#endif
2346 register struct DIRENT *dp;
2347
2348 if (!stab)
2349 goto nope;
2350 if (!(stio = stab_io(stab)))
2351 stio = stab_io(stab) = stio_new();
2352 if (!stio->dirp && optype != O_OPEN_DIR)
2353 goto nope;
2354 st[sp] = &str_yes;
2355 switch (optype) {
2356 case O_OPEN_DIR:
2357 if (stio->dirp)
2358 closedir(stio->dirp);
2359 if (!(stio->dirp = opendir(str_get(st[sp+1]))))
2360 goto nope;
2361 break;
2362 case O_READDIR:
2363 if (gimme == G_ARRAY) {
2364 --sp;
2365 /*SUPPRESS 560*/
2366 while (dp = readdir(stio->dirp)) {
2367#ifdef DIRNAMLEN
2368 (void)astore(ary,++sp,
2369 str_2mortal(str_make(dp->d_name,dp->d_namlen)));
2370#else
2371 (void)astore(ary,++sp,
2372 str_2mortal(str_make(dp->d_name,0)));
2373#endif
2374 }
2375 }
2376 else {
2377 if (!(dp = readdir(stio->dirp)))
2378 goto nope;
2379 st[sp] = str_mortal(&str_undef);
2380#ifdef DIRNAMLEN
2381 str_nset(st[sp], dp->d_name, dp->d_namlen);
2382#else
2383 str_set(st[sp], dp->d_name);
2384#endif
2385 }
2386 break;
2387#if defined(HAS_TELLDIR) || defined(telldir)
2388 case O_TELLDIR: {
2389#ifndef telldir
2390 long telldir();
2391#endif
2392 st[sp] = str_mortal(&str_undef);
2393 str_numset(st[sp], (double)telldir(stio->dirp));
2394 break;
2395 }
2396#endif
2397#if defined(HAS_SEEKDIR) || defined(seekdir)
2398 case O_SEEKDIR:
2399 st[sp] = str_mortal(&str_undef);
2400 along = (long)str_gnum(st[sp+1]);
2401 (void)seekdir(stio->dirp,along);
2402 break;
2403#endif
2404#if defined(HAS_REWINDDIR) || defined(rewinddir)
2405 case O_REWINDDIR:
2406 st[sp] = str_mortal(&str_undef);
2407 (void)rewinddir(stio->dirp);
2408 break;
2409#endif
2410 case O_CLOSEDIR:
2411 st[sp] = str_mortal(&str_undef);
2412 (void)closedir(stio->dirp);
2413 stio->dirp = 0;
2414 break;
2415 default:
2416 goto phooey;
2417 }
2418 return sp;
2419
2420nope:
2421 st[sp] = &str_undef;
2422 if (!errno)
2423 errno = EBADF;
2424 return sp;
2425
2426#endif
2427phooey:
2428 fatal("Unimplemented directory operation");
2429}
2430
2431int
2432apply(type,arglast)
2433int type;
2434int *arglast;
2435{
2436 register STR **st = stack->ary_array;
2437 register int sp = arglast[1];
2438 register int items = arglast[2] - sp;
2439 register int val;
2440 register int val2;
2441 register int tot = 0;
2442 char *s;
2443
2444#ifdef TAINT
2445 for (st += ++sp; items--; st++)
2446 tainted |= (*st)->str_tainted;
2447 st = stack->ary_array;
2448 sp = arglast[1];
2449 items = arglast[2] - sp;
2450#endif
2451 switch (type) {
2452 case O_CHMOD:
2453#ifdef TAINT
2454 taintproper("Insecure dependency in chmod");
2455#endif
2456 if (--items > 0) {
2457 tot = items;
2458 val = (int)str_gnum(st[++sp]);
2459 while (items--) {
2460 if (chmod(str_get(st[++sp]),val))
2461 tot--;
2462 }
2463 }
2464 break;
2465#ifdef HAS_CHOWN
2466 case O_CHOWN:
2467#ifdef TAINT
2468 taintproper("Insecure dependency in chown");
2469#endif
2470 if (items > 2) {
2471 items -= 2;
2472 tot = items;
2473 val = (int)str_gnum(st[++sp]);
2474 val2 = (int)str_gnum(st[++sp]);
2475 while (items--) {
2476 if (chown(str_get(st[++sp]),val,val2))
2477 tot--;
2478 }
2479 }
2480 break;
2481#endif
2482#ifdef HAS_KILL
2483 case O_KILL:
2484#ifdef TAINT
2485 taintproper("Insecure dependency in kill");
2486#endif
2487 if (--items > 0) {
2488 tot = items;
2489 s = str_get(st[++sp]);
2490 if (isUPPER(*s)) {
2491 if (*s == 'S' && s[1] == 'I' && s[2] == 'G')
2492 s += 3;
2493 if (!(val = whichsig(s)))
2494 fatal("Unrecognized signal name \"%s\"",s);
2495 }
2496 else
2497 val = (int)str_gnum(st[sp]);
2498 if (val < 0) {
2499 val = -val;
2500 while (items--) {
2501 int proc = (int)str_gnum(st[++sp]);
2502#ifdef HAS_KILLPG
2503 if (killpg(proc,val)) /* BSD */
2504#else
2505 if (kill(-proc,val)) /* SYSV */
2506#endif
2507 tot--;
2508 }
2509 }
2510 else {
2511 while (items--) {
2512 if (kill((int)(str_gnum(st[++sp])),val))
2513 tot--;
2514 }
2515 }
2516 }
2517 break;
2518#endif
2519 case O_UNLINK:
2520#ifdef TAINT
2521 taintproper("Insecure dependency in unlink");
2522#endif
2523 tot = items;
2524 while (items--) {
2525 s = str_get(st[++sp]);
2526 if (euid || unsafe) {
2527 if (UNLINK(s))
2528 tot--;
2529 }
2530 else { /* don't let root wipe out directories without -U */
2531#ifdef HAS_LSTAT
2532 if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
2533#else
2534 if (stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
2535#endif
2536 tot--;
2537 else {
2538 if (UNLINK(s))
2539 tot--;
2540 }
2541 }
2542 }
2543 break;
2544 case O_UTIME:
2545#ifdef TAINT
2546 taintproper("Insecure dependency in utime");
2547#endif
2548 if (items > 2) {
2549#ifdef I_UTIME
2550 struct utimbuf utbuf;
2551#else
2552 struct {
2553 long actime;
2554 long modtime;
2555 } utbuf;
2556#endif
2557
2558 Zero(&utbuf, sizeof utbuf, char);
2559 utbuf.actime = (long)str_gnum(st[++sp]); /* time accessed */
2560 utbuf.modtime = (long)str_gnum(st[++sp]); /* time modified */
2561 items -= 2;
2562#ifndef lint
2563 tot = items;
2564 while (items--) {
2565 if (utime(str_get(st[++sp]),&utbuf))
2566 tot--;
2567 }
2568#endif
2569 }
2570 else
2571 items = 0;
2572 break;
2573 }
2574 return tot;
2575}
2576
2577/* Do the permissions allow some operation? Assumes statcache already set. */
2578
2579int
2580cando(bit, effective, statbufp)
2581int bit;
2582int effective;
2583register struct stat *statbufp;
2584{
2585#ifdef DOSISH
2586 /* [Comments and code from Len Reed]
2587 * MS-DOS "user" is similar to UNIX's "superuser," but can't write
2588 * to write-protected files. The execute permission bit is set
2589 * by the Miscrosoft C library stat() function for the following:
2590 * .exe files
2591 * .com files
2592 * .bat files
2593 * directories
2594 * All files and directories are readable.
2595 * Directories and special files, e.g. "CON", cannot be
2596 * write-protected.
2597 * [Comment by Tom Dinger -- a directory can have the write-protect
2598 * bit set in the file system, but DOS permits changes to
2599 * the directory anyway. In addition, all bets are off
2600 * here for networked software, such as Novell and
2601 * Sun's PC-NFS.]
2602 */
2603
2604 /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat
2605 * too so it will actually look into the files for magic numbers
2606 */
2607 return (bit & statbufp->st_mode) ? TRUE : FALSE;
2608
2609#else /* ! MSDOS */
2610 if ((effective ? euid : uid) == 0) { /* root is special */
2611 if (bit == S_IXUSR) {
2612 if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode))
2613 return TRUE;
2614 }
2615 else
2616 return TRUE; /* root reads and writes anything */
2617 return FALSE;
2618 }
2619 if (statbufp->st_uid == (effective ? euid : uid) ) {
2620 if (statbufp->st_mode & bit)
2621 return TRUE; /* ok as "user" */
2622 }
2623 else if (ingroup((int)statbufp->st_gid,effective)) {
2624 if (statbufp->st_mode & bit >> 3)
2625 return TRUE; /* ok as "group" */
2626 }
2627 else if (statbufp->st_mode & bit >> 6)
2628 return TRUE; /* ok as "other" */
2629 return FALSE;
2630#endif /* ! MSDOS */
2631}
2632
2633int
2634ingroup(testgid,effective)
2635int testgid;
2636int effective;
2637{
2638 if (testgid == (effective ? egid : gid))
2639 return TRUE;
2640#ifdef HAS_GETGROUPS
2641#ifndef NGROUPS
2642#define NGROUPS 32
2643#endif
2644 {
2645 GROUPSTYPE gary[NGROUPS];
2646 int anum;
2647
2648 anum = getgroups(NGROUPS,gary);
2649 while (--anum >= 0)
2650 if (gary[anum] == testgid)
2651 return TRUE;
2652 }
2653#endif
2654 return FALSE;
2655}
2656
2657#if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM)
2658
2659int
2660do_ipcget(optype, arglast)
2661int optype;
2662int *arglast;
2663{
2664 register STR **st = stack->ary_array;
2665 register int sp = arglast[0];
2666 key_t key;
2667 int n, flags;
2668
2669 key = (key_t)str_gnum(st[++sp]);
2670 n = (optype == O_MSGGET) ? 0 : (int)str_gnum(st[++sp]);
2671 flags = (int)str_gnum(st[++sp]);
2672 errno = 0;
2673 switch (optype)
2674 {
2675#ifdef HAS_MSG
2676 case O_MSGGET:
2677 return msgget(key, flags);
2678#endif
2679#ifdef HAS_SEM
2680 case O_SEMGET:
2681 return semget(key, n, flags);
2682#endif
2683#ifdef HAS_SHM
2684 case O_SHMGET:
2685 return shmget(key, n, flags);
2686#endif
2687#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2688 default:
2689 fatal("%s not implemented", opname[optype]);
2690#endif
2691 }
2692 return -1; /* should never happen */
2693}
2694
2695int
2696do_ipcctl(optype, arglast)
2697int optype;
2698int *arglast;
2699{
2700 register STR **st = stack->ary_array;
2701 register int sp = arglast[0];
2702 STR *astr;
2703 char *a;
2704 int id, n, cmd, infosize, getinfo, ret;
2705
2706 id = (int)str_gnum(st[++sp]);
2707 n = (optype == O_SEMCTL) ? (int)str_gnum(st[++sp]) : 0;
2708 cmd = (int)str_gnum(st[++sp]);
2709 astr = st[++sp];
2710
2711 infosize = 0;
2712 getinfo = (cmd == IPC_STAT);
2713
2714 switch (optype)
2715 {
2716#ifdef HAS_MSG
2717 case O_MSGCTL:
2718 if (cmd == IPC_STAT || cmd == IPC_SET)
2719 infosize = sizeof(struct msqid_ds);
2720 break;
2721#endif
2722#ifdef HAS_SHM
2723 case O_SHMCTL:
2724 if (cmd == IPC_STAT || cmd == IPC_SET)
2725 infosize = sizeof(struct shmid_ds);
2726 break;
2727#endif
2728#ifdef HAS_SEM
2729 case O_SEMCTL:
2730 if (cmd == IPC_STAT || cmd == IPC_SET)
2731 infosize = sizeof(struct semid_ds);
2732 else if (cmd == GETALL || cmd == SETALL)
2733 {
2734 struct semid_ds semds;
2735 if (semctl(id, 0, IPC_STAT, &semds) == -1)
2736 return -1;
2737 getinfo = (cmd == GETALL);
2738 infosize = semds.sem_nsems * sizeof(short);
2739 /* "short" is technically wrong but much more portable
2740 than guessing about u_?short(_t)? */
2741 }
2742 break;
2743#endif
2744#if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM)
2745 default:
2746 fatal("%s not implemented", opname[optype]);
2747#endif
2748 }
2749
2750 if (infosize)
2751 {
2752 if (getinfo)
2753 {
2754 STR_GROW(astr, infosize+1);
2755 a = str_get(astr);
2756 }
2757 else
2758 {
2759 a = str_get(astr);
2760 if (astr->str_cur != infosize)
2761 {
2762 errno = EINVAL;
2763 return -1;
2764 }
2765 }
2766 }
2767 else
2768 {
2769 int i = (int)str_gnum(astr);
2770 a = (char *)i; /* ouch */
2771 }
2772 errno = 0;
2773 switch (optype)
2774 {
2775#ifdef HAS_MSG
2776 case O_MSGCTL:
2777 ret = msgctl(id, cmd, (struct msqid_ds *)a);
2778 break;
2779#endif
2780#ifdef HAS_SEM
2781 case O_SEMCTL:
2782 ret = semctl(id, n, cmd, a);
2783 break;
2784#endif
2785#ifdef HAS_SHM
2786 case O_SHMCTL:
2787 ret = shmctl(id, cmd, (struct shmid_ds *)a);
2788 break;
2789#endif
2790 }
2791 if (getinfo && ret >= 0) {
2792 astr->str_cur = infosize;
2793 astr->str_ptr[infosize] = '\0';
2794 }
2795 return ret;
2796}
2797
2798int
2799do_msgsnd(arglast)
2800int *arglast;
2801{
2802#ifdef HAS_MSG
2803 register STR **st = stack->ary_array;
2804 register int sp = arglast[0];
2805 STR *mstr;
2806 char *mbuf;
2807 int id, msize, flags;
2808
2809 id = (int)str_gnum(st[++sp]);
2810 mstr = st[++sp];
2811 flags = (int)str_gnum(st[++sp]);
2812 mbuf = str_get(mstr);
2813 if ((msize = mstr->str_cur - sizeof(long)) < 0) {
2814 errno = EINVAL;
2815 return -1;
2816 }
2817 errno = 0;
2818 return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
2819#else
2820 fatal("msgsnd not implemented");
2821#endif
2822}
2823
2824int
2825do_msgrcv(arglast)
2826int *arglast;
2827{
2828#ifdef HAS_MSG
2829 register STR **st = stack->ary_array;
2830 register int sp = arglast[0];
2831 STR *mstr;
2832 char *mbuf;
2833 long mtype;
2834 int id, msize, flags, ret;
2835
2836 id = (int)str_gnum(st[++sp]);
2837 mstr = st[++sp];
2838 msize = (int)str_gnum(st[++sp]);
2839 mtype = (long)str_gnum(st[++sp]);
2840 flags = (int)str_gnum(st[++sp]);
2841 mbuf = str_get(mstr);
2842 if (mstr->str_cur < sizeof(long)+msize+1) {
2843 STR_GROW(mstr, sizeof(long)+msize+1);
2844 mbuf = str_get(mstr);
2845 }
2846 errno = 0;
2847 ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
2848 if (ret >= 0) {
2849 mstr->str_cur = sizeof(long)+ret;
2850 mstr->str_ptr[sizeof(long)+ret] = '\0';
2851 }
2852 return ret;
2853#else
2854 fatal("msgrcv not implemented");
2855#endif
2856}
2857
2858int
2859do_semop(arglast)
2860int *arglast;
2861{
2862#ifdef HAS_SEM
2863 register STR **st = stack->ary_array;
2864 register int sp = arglast[0];
2865 STR *opstr;
2866 char *opbuf;
2867 int id, opsize;
2868
2869 id = (int)str_gnum(st[++sp]);
2870 opstr = st[++sp];
2871 opbuf = str_get(opstr);
2872 opsize = opstr->str_cur;
2873 if (opsize < sizeof(struct sembuf)
2874 || (opsize % sizeof(struct sembuf)) != 0) {
2875 errno = EINVAL;
2876 return -1;
2877 }
2878 errno = 0;
2879 return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf));
2880#else
2881 fatal("semop not implemented");
2882#endif
2883}
2884
2885int
2886do_shmio(optype, arglast)
2887int optype;
2888int *arglast;
2889{
2890#ifdef HAS_SHM
2891 register STR **st = stack->ary_array;
2892 register int sp = arglast[0];
2893 STR *mstr;
2894 char *mbuf, *shm;
2895 int id, mpos, msize;
2896 struct shmid_ds shmds;
2897#ifndef VOIDSHMAT
2898 extern char *shmat();
2899#endif
2900
2901 id = (int)str_gnum(st[++sp]);
2902 mstr = st[++sp];
2903 mpos = (int)str_gnum(st[++sp]);
2904 msize = (int)str_gnum(st[++sp]);
2905 errno = 0;
2906 if (shmctl(id, IPC_STAT, &shmds) == -1)
2907 return -1;
2908 if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) {
2909 errno = EFAULT; /* can't do as caller requested */
2910 return -1;
2911 }
2912 shm = (char*)shmat(id, (char*)NULL, (optype == O_SHMREAD) ? SHM_RDONLY : 0);
2913 if (shm == (char *)-1) /* I hate System V IPC, I really do */
2914 return -1;
2915 mbuf = str_get(mstr);
2916 if (optype == O_SHMREAD) {
2917 if (mstr->str_cur < msize) {
2918 STR_GROW(mstr, msize+1);
2919 mbuf = str_get(mstr);
2920 }
2921 Copy(shm + mpos, mbuf, msize, char);
2922 mstr->str_cur = msize;
2923 mstr->str_ptr[msize] = '\0';
2924 }
2925 else {
2926 int n;
2927
2928 if ((n = mstr->str_cur) > msize)
2929 n = msize;
2930 Copy(mbuf, shm + mpos, n, char);
2931 if (n < msize)
2932 memzero(shm + mpos + n, msize - n);
2933 }
2934 return shmdt(shm);
2935#else
2936 fatal("shm I/O not implemented");
2937#endif
2938}
2939
2940#endif /* SYSV IPC */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.