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1.1 root 1: /*
2:
1.1.1.3 root 3: Copyright 1990,1991,1992 Eric R. Smith.
4:
1.1.1.4 ! root 5: Copyright 1992,1993 Atari Corporation.
1.1.1.3 root 6:
7: All rights reserved.
1.1 root 8:
9: */
10:
11:
12:
13: /* DOS file handling routines */
14:
15:
16:
17: #include "mint.h"
18:
19:
20:
21: static long do_dup P_((int,int));
22:
23: static void unselectme P_((PROC *));
24:
25:
26:
27: /*
28:
29: * first, some utility routines
30:
31: */
32:
33:
34:
35: FILEPTR *
36:
37: do_open(name, rwmode, attr, x)
38:
39: const char *name; /* file name */
40:
41: int rwmode; /* file access mode */
42:
43: int attr; /* TOS attributes for created files (if applicable) */
44:
45: XATTR *x; /* filled in with attributes of opened file */
46:
47: {
48:
49: struct tty *tty;
50:
51: fcookie dir, fc;
52:
53: long devsp;
54:
55: FILEPTR *f;
56:
57: DEVDRV *dev;
58:
59: long r;
60:
61: XATTR xattr;
62:
63: unsigned perm;
64:
65: int creating;
66:
1.1.1.4 ! root 67: char temp1[PATH_MAX];
! 68:
1.1.1.3 root 69: extern FILESYS proc_filesys;
70:
1.1 root 71:
72:
73: /* for special BIOS "fake" devices */
74:
75: extern DEVDRV fakedev;
76:
77:
78:
1.1.1.2 root 79: TRACE(("do_open(%s)", name));
1.1 root 80:
81:
82:
83: /*
84:
85: * first step: get a cookie for the directory
86:
87: */
88:
89:
90:
91: r = path2cookie(name, temp1, &dir);
92:
93: if (r) {
94:
1.1.1.2 root 95: mint_errno = (int)r;
1.1 root 96:
1.1.1.2 root 97: DEBUG(("do_open(%s): error %ld", name, r));
1.1 root 98:
99: return NULL;
100:
101: }
102:
103:
104:
105: /*
106:
107: * second step: try to locate the file itself
108:
109: */
110:
111: r = relpath2cookie(&dir, temp1, follow_links, &fc, 0);
112:
113:
114:
115: /*
116:
117: * file found: this is an error if (O_CREAT|O_EXCL) are set
118:
119: */
120:
1.1.1.3 root 121:
122:
1.1 root 123: if ( (r == 0) && ( (rwmode & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) ) ) {
124:
1.1.1.2 root 125: DEBUG(("do_open(%s): file already exists",name));
1.1 root 126:
127: mint_errno = EACCDN;
128:
1.1.1.3 root 129: release_cookie(&fc);
130:
131: release_cookie(&dir);
132:
1.1 root 133: return NULL;
134:
135: }
136:
137: /*
138:
139: * file not found: maybe we should create it
140:
1.1.1.3 root 141: * note that if r != 0, the fc cookie is invalid (so we don't need to
142:
143: * release it)
144:
1.1 root 145: */
146:
147: if (r == EFILNF && (rwmode & O_CREAT)) {
148:
149: /* check first for write permission in the directory */
150:
151: r = (*dir.fs->getxattr)(&dir, &xattr);
152:
153: if (r == 0) {
154:
155: if (denyaccess(&xattr, S_IWOTH))
156:
157: r = EACCDN;
158:
159: }
160:
161: if (r) {
162:
1.1.1.2 root 163: DEBUG(("do_open(%s): couldn't get "
1.1 root 164:
1.1.1.2 root 165: "write permission on directory",name));
1.1 root 166:
1.1.1.2 root 167: mint_errno = (int)r;
1.1 root 168:
1.1.1.3 root 169: release_cookie(&dir);
170:
1.1 root 171: return NULL;
172:
173: }
174:
175: r = (*dir.fs->creat)(&dir, temp1,
176:
177: (S_IFREG|DEFAULT_MODE) & (~curproc->umask), attr, &fc);
178:
179: if (r) {
180:
1.1.1.2 root 181: DEBUG(("do_open(%s): error %ld while creating file",
1.1 root 182:
1.1.1.2 root 183: name, r));
1.1 root 184:
1.1.1.2 root 185: mint_errno = (int)r;
1.1 root 186:
1.1.1.3 root 187: release_cookie(&dir);
188:
1.1 root 189: return NULL;
190:
191: }
192:
193: creating = 1;
194:
195: } else if (r) {
196:
1.1.1.2 root 197: DEBUG(("do_open(%s): error %ld while searching for file",
1.1 root 198:
1.1.1.2 root 199: name, r));
1.1 root 200:
1.1.1.2 root 201: mint_errno = (int)r;
1.1 root 202:
1.1.1.3 root 203: release_cookie(&dir);
204:
1.1 root 205: return NULL;
206:
207: } else {
208:
209: creating = 0;
210:
211: }
212:
213:
214:
215: /*
216:
217: * check now for permission to actually access the file
218:
219: */
220:
221: r = (*fc.fs->getxattr)(&fc, &xattr);
222:
223: if (r) {
224:
1.1.1.2 root 225: DEBUG(("do_open(%s): couldn't get file attributes",name));
1.1 root 226:
1.1.1.2 root 227: mint_errno = (int)r;
1.1 root 228:
1.1.1.3 root 229: release_cookie(&dir);
230:
231: release_cookie(&fc);
232:
1.1 root 233: return NULL;
234:
235: }
236:
237: /*
238:
239: * we don't do directories
240:
241: */
242:
243: if ( (xattr.mode & S_IFMT) == S_IFDIR ) {
244:
1.1.1.2 root 245: DEBUG(("do_open(%s): file is a directory",name));
1.1 root 246:
1.1.1.3 root 247: release_cookie(&dir);
248:
249: release_cookie(&fc);
250:
1.1 root 251: mint_errno = EFILNF;
252:
253: return NULL;
254:
255: }
256:
257:
258:
259: switch (rwmode & O_RWMODE) {
260:
261: case O_WRONLY:
262:
263: perm = S_IWOTH;
264:
265: break;
266:
267: case O_RDWR:
268:
269: perm = S_IROTH|S_IWOTH;
270:
271: break;
272:
273: case O_EXEC:
274:
275: perm = (fc.fs->fsflags & FS_NOXBIT) ? S_IROTH : S_IXOTH;
276:
277: break;
278:
279: case O_RDONLY:
280:
281: perm = S_IROTH;
282:
283: break;
284:
285: default:
286:
287: perm = 0;
288:
289: ALERT("do_open: bad file access mode: %x", rwmode);
290:
291: }
292:
293: if (!creating && denyaccess(&xattr, perm)) {
294:
1.1.1.2 root 295: DEBUG(("do_open(%s): access to file denied",name));
1.1 root 296:
1.1.1.3 root 297: release_cookie(&dir);
298:
299: release_cookie(&fc);
300:
1.1 root 301: mint_errno = EACCDN;
302:
303: return NULL;
304:
305: }
306:
307:
308:
309: /*
310:
311: * an extra check for write access -- even the superuser shouldn't
312:
313: * write to files with the FA_RDONLY attribute bit set (unless,
314:
1.1.1.3 root 315: * we just created the file, or unless the file is on the proc
316:
317: * file system and hence FA_RDONLY has a different meaning)
1.1 root 318:
319: */
320:
1.1.1.3 root 321: if ( !creating && (xattr.attr & FA_RDONLY) && fc.fs != &proc_filesys) {
1.1 root 322:
323: if ( (rwmode & O_RWMODE) == O_RDWR ||
324:
325: (rwmode & O_RWMODE) == O_WRONLY ) {
326:
1.1.1.2 root 327: DEBUG(("do_open(%s): can't write a read-only file",
1.1 root 328:
1.1.1.2 root 329: name));
1.1 root 330:
1.1.1.3 root 331: release_cookie(&dir);
332:
333: release_cookie(&fc);
334:
1.1 root 335: mint_errno = EACCDN;
336:
337: return NULL;
338:
339: }
340:
341: }
342:
343:
344:
345: /*
346:
347: * if writing to a setuid or setgid file, clear those bits
348:
349: */
350:
351: if ( (perm & S_IWOTH) && (xattr.mode & (S_ISUID|S_ISGID)) ) {
352:
353: xattr.mode &= ~(S_ISUID|S_ISGID);
354:
355: (*fc.fs->chmode)(&fc, (xattr.mode & ~S_IFMT));
356:
357: }
358:
359: /*
360:
361: * If the caller asked for the attributes of the opened file, copy them over.
362:
363: */
364:
365: if (x) *x = xattr;
366:
367:
368:
369: /*
370:
371: * So far, so good. Let's get the device driver now, and try to
372:
373: * actually open the file.
374:
375: */
376:
377: dev = (*fc.fs->getdev)(&fc, &devsp);
378:
379: if (!dev) {
380:
1.1.1.2 root 381: mint_errno = (int)devsp;
1.1 root 382:
1.1.1.2 root 383: DEBUG(("do_open(%s): device driver not found",name));
1.1 root 384:
1.1.1.3 root 385: release_cookie(&dir);
386:
387: release_cookie(&fc);
388:
1.1 root 389: return NULL;
390:
391: }
392:
393:
394:
395: if (dev == &fakedev) { /* fake BIOS devices */
396:
397: f = curproc->handle[devsp];
398:
399: if (!f) {
400:
401: mint_errno = EIHNDL;
402:
403: return 0;
404:
405: }
406:
407: f->links++;
408:
1.1.1.3 root 409: release_cookie(&dir);
410:
411: release_cookie(&fc);
412:
1.1 root 413: return f;
414:
415: }
416:
1.1.1.2 root 417: if (0 == (f = new_fileptr())) {
1.1 root 418:
1.1.1.3 root 419: release_cookie(&dir);
420:
421: release_cookie(&fc);
422:
1.1 root 423: mint_errno = ENSMEM;
424:
425: return NULL;
426:
427: }
428:
429: f->links = 1;
430:
431: f->flags = rwmode;
432:
433: f->pos = 0;
434:
435: f->devinfo = devsp;
436:
437: f->fc = fc;
438:
439: f->dev = dev;
440:
1.1.1.3 root 441: release_cookie(&dir);
442:
1.1 root 443:
444:
445: r = (*dev->open)(f);
446:
447: if (r < 0) {
448:
1.1.1.2 root 449: DEBUG(("do_open(%s): device open failed with error %ld",
1.1 root 450:
1.1.1.2 root 451: name, r));
1.1 root 452:
1.1.1.2 root 453: mint_errno = (int)r;
1.1 root 454:
455: f->links = 0;
456:
1.1.1.3 root 457: release_cookie(&fc);
458:
1.1 root 459: dispose_fileptr(f);
460:
461: return NULL;
462:
463: }
464:
465:
466:
467: /* special code for opening a tty */
468:
469: if (is_terminal(f)) {
470:
471: extern struct tty default_tty; /* in tty.c */
472:
473:
474:
475: tty = (struct tty *)f->devinfo;
476:
477: if (tty->use_cnt == 0) { /* first open for this device? */
478:
479: *tty = default_tty;
480:
481: }
482:
483: tty->use_cnt++;
484:
485: }
486:
487: return f;
488:
489: }
490:
491:
492:
493: /*
494:
495: * helper function for do_close: this closes the indicated file pointer which
496:
497: * is assumed to be associated with process p. The extra parameter is necessary
498:
499: * because f_midipipe mucks with file pointers of other processes, so
500:
501: * sometimes p != curproc.
502:
503: *
504:
505: * Note that the function changedrv() in filesys.c can call this routine.
506:
507: * in that case, f->dev will be 0 to represent an invalid device, and
508:
509: * we cannot call the device close routine.
510:
511: */
512:
513:
514:
515: long
516:
517: do_pclose(p, f)
518:
519: PROC *p;
520:
521: FILEPTR *f;
522:
523: {
524:
525: long r = 0;
526:
527:
528:
529: if (!f) return EIHNDL;
530:
531:
532:
533: /* if this file is "select'd" by this process, unselect it
534:
1.1.1.2 root 535: * (this is just in case we were killed by a signal)
1.1 root 536:
537: */
538:
539:
540:
541: /* BUG? Feature? If media change is detected while we're doing the select,
542:
543: * we'll never unselect (since f->dev is set to NULL by changedrv())
544:
545: */
546:
547: if (f->dev) {
548:
549: (*f->dev->unselect)(f, (long)p, O_RDONLY);
550:
551: (*f->dev->unselect)(f, (long)p, O_WRONLY);
552:
553: }
554:
555:
556:
557: f->links--;
558:
559:
560:
561: /* TTY manipulation must be done *before* calling the device close routine,
562:
563: * since afterwards the TTY structure may no longer exist
564:
565: */
566:
567: if (is_terminal(f) && f->links <= 0) {
568:
569: struct tty *tty = (struct tty *)f->devinfo;
570:
571: tty->use_cnt--;
572:
1.1.1.3 root 573: if (tty->use_cnt <= 0)
574:
575: tty->pgrp = 0;
576:
1.1 root 577: if (tty->use_cnt <= 0 && tty->xkey) {
578:
579: kfree(tty->xkey);
580:
581: tty->xkey = 0;
582:
583: }
584:
585: }
586:
587:
588:
589: if (f->dev) {
590:
591: r = (*f->dev->close)(f, p->pid);
592:
593: if (r) {
594:
1.1.1.2 root 595: DEBUG(("close: device close failed"));
1.1 root 596:
597: }
598:
599: }
600:
601: if (f->links <= 0) {
602:
1.1.1.3 root 603: release_cookie(&f->fc);
604:
1.1 root 605: dispose_fileptr(f);
606:
607: }
608:
609: return r;
610:
611: }
612:
613:
614:
615: long
616:
617: do_close(f)
618:
619: FILEPTR *f;
620:
621: {
622:
623: return do_pclose(curproc, f);
624:
625: }
626:
627:
628:
1.1.1.2 root 629: long ARGS_ON_STACK
1.1 root 630:
631: f_open(name, mode)
632:
633: const char *name;
634:
635: int mode;
636:
637: {
638:
639: int i;
640:
641: FILEPTR *f;
642:
643: PROC *proc;
644:
645:
646:
1.1.1.2 root 647: TRACE(("Fopen(%s, %x)", name, mode));
1.1 root 648:
649: #if O_GLOBAL
650:
651: if (mode & O_GLOBAL) {
652:
653: /* oh, boy! user wants us to open a global handle! */
654:
655: proc = rootproc;
656:
657: }
658:
659: else
660:
661: #endif
662:
663: proc = curproc;
664:
665:
666:
667: for (i = MIN_OPEN; i < MAX_OPEN; i++) {
668:
669: if (!proc->handle[i])
670:
671: goto found_for_open;
672:
673: }
674:
1.1.1.2 root 675: DEBUG(("Fopen(%s): process out of handles",name));
1.1 root 676:
677: return ENHNDL; /* no more handles */
678:
679:
680:
681: found_for_open:
682:
683: mode &= O_USER; /* make sure the mode is legal */
684:
685:
686:
687: /* note: file mode 3 is reserved for the kernel; for users, transmogrify it
688:
689: * into O_RDWR (mode 2)
690:
691: */
692:
693: if ( (mode & O_RWMODE) == O_EXEC ) {
694:
695: mode = (mode & ~O_RWMODE) | O_RDWR;
696:
697: }
698:
699:
700:
701: f = do_open(name, mode, 0, (XATTR *)0);
702:
703:
704:
705:
706:
707: if (!f) {
708:
709: return mint_errno;
710:
711: }
712:
713: proc->handle[i] = f;
714:
715: /* default is to close non-standard files on exec */
716:
717: proc->fdflags[i] = FD_CLOEXEC;
718:
719:
720:
721: #if O_GLOBAL
722:
723: if (proc != curproc) {
724:
725: /* we just opened a global handle */
726:
727: i += 100;
728:
729: }
730:
731: #endif
732:
733:
734:
1.1.1.2 root 735: TRACE(("Fopen: returning %d", i));
1.1 root 736:
737: return i;
738:
739: }
740:
741:
742:
1.1.1.2 root 743: long ARGS_ON_STACK
1.1 root 744:
745: f_create(name, attrib)
746:
747: const char *name;
748:
749: int attrib;
750:
751: {
752:
753: fcookie dir;
754:
755: int i;
756:
757: FILEPTR *f;
758:
759: long r;
760:
761: PROC *proc;
762:
763: int offset = 0;
764:
1.1.1.4 ! root 765: char temp1[PATH_MAX];
! 766:
1.1 root 767:
768:
1.1.1.2 root 769: TRACE(("Fcreate(%s, %x)", name, attrib));
1.1 root 770:
771: #if O_GLOBAL
772:
773: if (attrib & O_GLOBAL) {
774:
775: proc = rootproc;
776:
777: offset = 100;
778:
779: attrib &= ~O_GLOBAL;
780:
781: }
782:
783: else
784:
785: #endif
786:
787: proc = curproc;
788:
789:
790:
791: for (i = MIN_OPEN; i < MAX_OPEN; i++) {
792:
793: if (!proc->handle[i])
794:
795: goto found_for_create;
796:
797: }
798:
1.1.1.2 root 799: DEBUG(("Fcreate(%s): process out of handles",name));
1.1 root 800:
801: return ENHNDL; /* no more handles */
802:
803:
804:
805: found_for_create:
806:
807: if (attrib == FA_LABEL) {
808:
809: r = path2cookie(name, temp1, &dir);
810:
811: if (r) return r;
812:
813: r = (*dir.fs->writelabel)(&dir, temp1);
814:
1.1.1.3 root 815: release_cookie(&dir);
816:
1.1 root 817: if (r) return r;
818:
819: /*
820:
821: * just in case the caller tries to do something with this handle,
822:
823: * make it point to u:\dev\null
824:
825: */
826:
827: f = do_open("u:\\dev\\null", O_RDWR|O_CREAT|O_TRUNC, 0,
828:
829: (XATTR *)0);
830:
831: proc->handle[i] = f;
832:
1.1.1.4 ! root 833: proc->fdflags[i] = FD_CLOEXEC;
! 834:
1.1 root 835: return i+offset;
836:
837: }
838:
839: if (attrib & (FA_LABEL|FA_DIR)) {
840:
1.1.1.2 root 841: DEBUG(("Fcreate(%s,%x): illegal attributes",name,attrib));
1.1 root 842:
843: return EACCDN;
844:
845: }
846:
847:
848:
849: f = do_open(name, O_RDWR|O_CREAT|O_TRUNC, attrib, (XATTR *)0);
850:
851:
852:
853: if (!f) {
854:
1.1.1.2 root 855: DEBUG(("Fcreate(%s) failed, error %d", name, mint_errno));
1.1 root 856:
857: return mint_errno;
858:
859: }
860:
861: proc->handle[i] = f;
862:
1.1.1.4 ! root 863: proc->fdflags[i] = FD_CLOEXEC;
! 864:
1.1 root 865: i += offset;
866:
1.1.1.2 root 867: TRACE(("Fcreate: returning %d", i));
1.1 root 868:
869: return i;
870:
871: }
872:
873:
874:
1.1.1.2 root 875: long ARGS_ON_STACK
1.1 root 876:
877: f_close(fh)
878:
879: int fh;
880:
881: {
882:
883: FILEPTR *f;
884:
885: long r;
886:
887: PROC *proc;
888:
889:
890:
1.1.1.2 root 891: TRACE(("Fclose: %d", fh));
1.1 root 892:
893: #if O_GLOBAL
894:
895: if (fh >= 100) {
896:
897: fh -= 100;
898:
899: proc = rootproc;
900:
901: }
902:
903: else
904:
905: #endif
906:
907: proc = curproc;
908:
909:
910:
1.1.1.2 root 911: if (fh < 0 || fh >= MAX_OPEN || 0 == (f = proc->handle[fh])) {
1.1 root 912:
913: return EIHNDL;
914:
915: }
916:
1.1.1.3 root 917: r = do_pclose(proc, f);
1.1 root 918:
919:
920:
921: /* standard handles should be restored to default values */
922:
923: /* do this for TOS domain only! */
924:
925: if (proc->domain == DOM_TOS) {
926:
927: if (fh == 0 || fh == 1)
928:
929: f = proc->handle[-1];
930:
931: else if (fh == 2 || fh == 3)
932:
933: f = proc->handle[-fh];
934:
935: else
936:
937: f = 0;
938:
939: } else
940:
941: f = 0;
942:
943:
944:
1.1.1.4 ! root 945: if (f) {
! 946:
! 947: f->links++;
! 948:
! 949: proc->fdflags[fh] = 0;
! 950:
! 951: }
1.1 root 952:
953: proc->handle[fh] = f;
954:
955: return r;
956:
957: }
958:
959:
960:
1.1.1.2 root 961: long ARGS_ON_STACK
1.1 root 962:
963: f_read(fh, count, buf)
964:
965: int fh;
966:
967: long count;
968:
969: char *buf;
970:
971: {
972:
973: FILEPTR *f;
974:
975:
976:
977: PROC *proc;
978:
979:
980:
981: #if O_GLOBAL
982:
983: if (fh >= 100) {
984:
985: fh -= 100;
986:
987: proc = rootproc;
988:
989: }
990:
991: else
992:
993: #endif
994:
995: proc = curproc;
996:
997:
998:
1.1.1.2 root 999: if (fh < MIN_HANDLE || fh >= MAX_OPEN || 0 == (f = proc->handle[fh])) {
1.1 root 1000:
1.1.1.2 root 1001: DEBUG(("Fread: invalid handle: %d", fh));
1.1 root 1002:
1003: return EIHNDL;
1004:
1005: }
1006:
1007: if ( (f->flags & O_RWMODE) == O_WRONLY ) {
1008:
1.1.1.2 root 1009: DEBUG(("Fread: read on a write-only handle"));
1.1 root 1010:
1011: return EACCDN;
1012:
1013: }
1014:
1015: if (is_terminal(f))
1016:
1017: return tty_read(f, buf, count);
1018:
1019:
1020:
1.1.1.3 root 1021: TRACELOW(("Fread: %ld bytes from handle %d to %lx", count, fh, buf));
1.1 root 1022:
1023: return (*f->dev->read)(f, buf, count);
1024:
1025: }
1026:
1027:
1028:
1.1.1.2 root 1029: long ARGS_ON_STACK
1.1 root 1030:
1031: f_write(fh, count, buf)
1032:
1033: int fh;
1034:
1035: long count;
1036:
1037: const char *buf;
1038:
1039: {
1040:
1041: FILEPTR *f;
1042:
1043: PROC *proc;
1044:
1045: long r;
1046:
1047:
1048:
1049: #if O_GLOBAL
1050:
1051: if (fh >= 100) {
1052:
1053: fh -= 100;
1054:
1055: proc = rootproc;
1056:
1057: }
1058:
1059: else
1060:
1061: #endif
1062:
1063: proc = curproc;
1064:
1065:
1066:
1.1.1.2 root 1067: if (fh < MIN_HANDLE || fh >= MAX_OPEN || 0 == (f = proc->handle[fh])) {
1.1 root 1068:
1.1.1.2 root 1069: DEBUG(("Fwrite: bad handle: %d", fh));
1.1 root 1070:
1071: return EIHNDL;
1072:
1073: }
1074:
1075: if ( (f->flags & O_RWMODE) == O_RDONLY ) {
1076:
1.1.1.2 root 1077: DEBUG(("Fwrite: write on a read-only handle"));
1.1 root 1078:
1079: return EACCDN;
1080:
1081: }
1082:
1083: if (is_terminal(f))
1084:
1085: return tty_write(f, buf, count);
1086:
1087:
1088:
1089: /* it would be faster to do this in the device driver, but this
1090:
1091: * way the drivers are easier to write
1092:
1093: */
1094:
1.1.1.3 root 1095: if (f->flags & O_APPEND) {
1.1 root 1096:
1097: r = (*f->dev->lseek)(f, 0L, SEEK_END);
1098:
1.1.1.3 root 1099: /* ignore errors from unseekable files (e.g. pipes) */
1100:
1101: if (r == EACCDN)
1102:
1103: r = 0;
1104:
1105: } else
1.1 root 1106:
1107: r = 0;
1108:
1109: if (r >= 0) {
1110:
1.1.1.3 root 1111: TRACELOW(("Fwrite: %ld bytes to handle %d", count, fh));
1.1 root 1112:
1113: r = (*f->dev->write)(f, buf, count);
1114:
1115: }
1116:
1117: if (r < 0) {
1118:
1.1.1.2 root 1119: DEBUG(("Fwrite: error %ld", r));
1.1 root 1120:
1121: }
1122:
1123: return r;
1124:
1125: }
1126:
1127:
1128:
1.1.1.2 root 1129: long ARGS_ON_STACK
1.1 root 1130:
1131: f_seek(place, fh, how)
1132:
1133: long place;
1134:
1135: int fh;
1136:
1137: int how;
1138:
1139: {
1140:
1141: FILEPTR *f;
1142:
1143: PROC *proc;
1144:
1145:
1146:
1.1.1.2 root 1147: TRACE(("Fseek(%ld, %d) on handle %d", place, how, fh));
1.1 root 1148:
1149: #if O_GLOBAL
1150:
1151: if (fh >= 100) {
1152:
1153: fh -= 100;
1154:
1155: proc = rootproc;
1156:
1157: }
1158:
1159: else
1160:
1161: #endif
1162:
1163: proc = curproc;
1164:
1165:
1166:
1.1.1.2 root 1167: if (fh < MIN_HANDLE || fh >= MAX_OPEN || 0 == (f = proc->handle[fh])) {
1.1 root 1168:
1.1.1.2 root 1169: DEBUG(("Fseek: bad handle: %d", fh));
1.1 root 1170:
1171: return EIHNDL;
1172:
1173: }
1174:
1175: if (is_terminal(f)) {
1176:
1177: return 0;
1178:
1179: }
1180:
1181: return (*f->dev->lseek)(f, place, how);
1182:
1183: }
1184:
1185:
1186:
1187: /* duplicate file pointer fh; returns a new file pointer >= min, if
1188:
1189: one exists, or ENHNDL if not. called by f_dup and f_cntl
1190:
1191: */
1192:
1193:
1194:
1195: static long do_dup(fh, min)
1196:
1197: int fh, min;
1198:
1199: {
1200:
1201: FILEPTR *f;
1202:
1203: int i;
1204:
1205: PROC *proc;
1206:
1207:
1208:
1209: for (i = min; i < MAX_OPEN; i++) {
1210:
1211: if (!curproc->handle[i])
1212:
1213: goto found;
1214:
1215: }
1216:
1217: return ENHNDL; /* no more handles */
1218:
1219: found:
1220:
1221: #if O_GLOBAL
1222:
1223: if (fh >= 100) {
1224:
1225: fh -= 100;
1226:
1227: proc = rootproc;
1228:
1229: } else
1230:
1231: #endif
1232:
1233: proc = curproc;
1234:
1235:
1236:
1.1.1.2 root 1237: if (fh < MIN_HANDLE || fh >= MAX_OPEN || 0 == (f = proc->handle[fh]))
1.1 root 1238:
1239: return EIHNDL;
1240:
1241:
1242:
1243: curproc->handle[i] = f;
1244:
1245:
1246:
1247: /* set default file descriptor flags */
1248:
1249: if (i >= 0) {
1250:
1251: if (i >= MIN_OPEN)
1252:
1253: curproc->fdflags[i] = FD_CLOEXEC;
1254:
1255: else
1256:
1257: curproc->fdflags[i] = 0;
1258:
1259: }
1260:
1261: f->links++;
1262:
1263: return i;
1264:
1265: }
1266:
1267:
1268:
1.1.1.2 root 1269: long ARGS_ON_STACK
1.1 root 1270:
1271: f_dup(fh)
1272:
1273: int fh;
1274:
1275: {
1276:
1277: long r;
1278:
1279: r = do_dup(fh, MIN_OPEN);
1280:
1.1.1.2 root 1281: TRACE(("Fdup(%d) -> %ld", fh, r));
1.1 root 1282:
1283: return r;
1284:
1285: }
1286:
1287:
1288:
1.1.1.2 root 1289: long ARGS_ON_STACK
1.1 root 1290:
1291: f_force(newh, oldh)
1292:
1293: int newh;
1294:
1295: int oldh;
1296:
1297: {
1298:
1299: FILEPTR *f;
1300:
1301: PROC *proc;
1302:
1303:
1304:
1.1.1.2 root 1305: TRACE(("Fforce(%d, %d)", newh, oldh));
1.1 root 1306:
1307:
1308:
1309: #if O_GLOBAL
1310:
1311: if (oldh >= 100) {
1312:
1313: oldh -= 100;
1314:
1315: proc = rootproc;
1316:
1317: } else
1318:
1319: #endif
1320:
1321: proc = curproc;
1322:
1323:
1324:
1325: if (oldh < MIN_HANDLE || oldh >= MAX_OPEN ||
1326:
1.1.1.2 root 1327: 0 == (f = proc->handle[oldh])) {
1.1 root 1328:
1.1.1.2 root 1329: DEBUG(("Fforce: old handle invalid"));
1.1 root 1330:
1331: return EIHNDL;
1332:
1333: }
1334:
1335:
1336:
1337: if (newh < MIN_HANDLE || newh >= MAX_OPEN) {
1338:
1.1.1.2 root 1339: DEBUG(("Fforce: new handle out of range"));
1.1 root 1340:
1341: return EIHNDL;
1342:
1343: }
1344:
1345:
1346:
1347: (void)do_close(curproc->handle[newh]);
1348:
1349: curproc->handle[newh] = f;
1350:
1.1.1.4 ! root 1351: /* set default file descriptor flags */
! 1352:
! 1353: if (newh >= 0)
! 1354:
! 1355: curproc->fdflags[newh] = (newh >= MIN_OPEN) ? FD_CLOEXEC : 0;
! 1356:
1.1 root 1357: f->links++;
1358:
1359: /*
1360:
1361: * special: for a tty, if this is becoming a control terminal and the
1362:
1363: * tty doesn't have a pgrp yet, make it have the pgrp of the process
1364:
1365: * doing the Fforce
1366:
1367: */
1368:
1369: if (is_terminal(f) && newh == -1) {
1370:
1371: struct tty *tty = (struct tty *)f->devinfo;
1372:
1373:
1374:
1375: if (!tty->pgrp)
1376:
1377: tty->pgrp = curproc->pgrp;
1378:
1379: }
1380:
1.1.1.4 ! root 1381: return 0;
1.1 root 1382:
1383: }
1384:
1385:
1386:
1.1.1.2 root 1387: long ARGS_ON_STACK
1.1 root 1388:
1389: f_datime(timeptr, fh, rwflag)
1390:
1391: short *timeptr;
1392:
1393: int fh;
1394:
1395: int rwflag;
1396:
1397: {
1398:
1399: FILEPTR *f;
1400:
1401: PROC *proc;
1402:
1403:
1404:
1.1.1.2 root 1405: TRACE(("Fdatime(%d)", fh));
1.1 root 1406:
1407: #if O_GLOBAL
1408:
1409: if (fh >= 100) {
1410:
1411: fh -= 100;
1412:
1413: proc = rootproc;
1414:
1415: }
1416:
1417: else
1418:
1419: #endif
1420:
1421: proc = curproc;
1422:
1423:
1424:
1.1.1.2 root 1425: if (fh < MIN_HANDLE || fh >= MAX_OPEN || 0 == (f = proc->handle[fh])) {
1.1 root 1426:
1.1.1.2 root 1427: DEBUG(("Fdatime: invalid handle"));
1.1 root 1428:
1429: return EIHNDL;
1430:
1431: }
1432:
1433:
1434:
1435: /* some programs use Fdatime to test for TTY devices */
1436:
1437: if (is_terminal(f))
1438:
1439: return EACCDN;
1440:
1441:
1442:
1443: return (*f->dev->datime)(f, timeptr, rwflag);
1444:
1445: }
1446:
1447:
1448:
1.1.1.2 root 1449: long ARGS_ON_STACK
1.1 root 1450:
1451: f_lock(fh, mode, start, length)
1452:
1453: int fh, mode;
1454:
1455: long start, length;
1456:
1457: {
1458:
1459: FILEPTR *f;
1460:
1461: struct flock lock;
1462:
1463: PROC *proc;
1464:
1465:
1466:
1467: #if O_GLOBAL
1468:
1469: if (fh >= 100) {
1470:
1471: fh -= 100;
1472:
1473: proc = rootproc;
1474:
1475: }
1476:
1477: else
1478:
1479: #endif
1480:
1481: proc = curproc;
1482:
1483:
1484:
1.1.1.2 root 1485: if (fh < MIN_HANDLE || fh >= MAX_OPEN || 0 == (f = proc->handle[fh])) {
1.1 root 1486:
1.1.1.2 root 1487: DEBUG(("Flock: invalid handle"));
1.1 root 1488:
1489: return EIHNDL;
1490:
1491: }
1492:
1.1.1.2 root 1493: TRACE(("Flock(%d,%d,%ld,%ld)", fh, mode, start, length));
1.1 root 1494:
1495: lock.l_whence = SEEK_SET;
1496:
1497: lock.l_start = start;
1498:
1499: lock.l_len = length;
1500:
1501:
1502:
1503: if (mode == 0) /* create a lock */
1504:
1505: lock.l_type = F_WRLCK;
1506:
1507: else if (mode == 1) /* unlock region */
1508:
1509: lock.l_type = F_UNLCK;
1510:
1511: else
1512:
1513: return EINVFN;
1514:
1515:
1516:
1517: return (*f->dev->ioctl)(f, F_SETLK, &lock);
1518:
1519: }
1520:
1521:
1522:
1523: /*
1524:
1525: * extensions to GEMDOS:
1526:
1527: */
1528:
1529:
1530:
1531: /*
1532:
1533: * Fpipe(int *handles): opens a pipe. if successful, returns 0, and
1534:
1535: * sets handles[0] to a file descriptor for the read end of the pipe
1536:
1537: * and handles[1] to one for the write end.
1538:
1539: */
1540:
1541:
1542:
1.1.1.2 root 1543: long ARGS_ON_STACK
1.1 root 1544:
1545: f_pipe(usrh)
1546:
1547: short *usrh;
1548:
1549: {
1550:
1551: FILEPTR *in, *out;
1552:
1553: static int pipeno = 0;
1554:
1555: int i, j;
1556:
1557: char pipename[32]; /* MAGIC: 32 >= strlen "u:\pipe\sys$pipe.000\0" */
1558:
1559:
1560:
1.1.1.2 root 1561: TRACE(("Fpipe"));
1.1 root 1562:
1563:
1564:
1565: /* BUG: more than 999 open pipes hangs the system */
1566:
1567: do {
1568:
1569: ksprintf(pipename, "u:\\pipe\\sys$pipe.%03d", pipeno);
1570:
1571: pipeno++; if (pipeno > 999) pipeno = 0;
1572:
1.1.1.2 root 1573: out = do_open(pipename, O_WRONLY|O_CREAT|O_EXCL, FA_RDONLY|FA_HIDDEN|FA_CHANGED,
1574:
1575: (XATTR *)0);
1.1 root 1576:
1577: /* read-only attribute means unidirectional fifo */
1578:
1579: /* hidden attribute means check for broken pipes */
1580:
1.1.1.2 root 1581: /* changed attribute means act like Unix fifos */
1582:
1.1 root 1583: } while (out == 0 && mint_errno == EACCDN);
1584:
1585:
1586:
1587: if (!out) {
1588:
1.1.1.2 root 1589: DEBUG(("Fpipe: error %d", mint_errno));
1.1 root 1590:
1591: return mint_errno;
1592:
1593: }
1594:
1595:
1596:
1597: in = do_open(pipename, O_RDONLY, 0, (XATTR *)0);
1598:
1599: if (!in) {
1600:
1.1.1.2 root 1601: DEBUG(("Fpipe: in side of pipe not opened (error %d)",
1.1 root 1602:
1.1.1.2 root 1603: mint_errno));
1.1 root 1604:
1605: (void)do_close(out);
1606:
1607: return mint_errno;
1608:
1609: }
1610:
1611:
1612:
1613: for (i = MIN_OPEN; i < MAX_OPEN; i++) {
1614:
1615: if (curproc->handle[i] == 0)
1616:
1617: break;
1618:
1619: }
1620:
1621:
1622:
1623: for (j = i+1; j < MAX_OPEN; j++) {
1624:
1625: if (curproc->handle[j] == 0)
1626:
1627: break;
1628:
1629: }
1630:
1631:
1632:
1633: if (j >= MAX_OPEN) {
1634:
1.1.1.2 root 1635: DEBUG(("Fpipe: not enough handles left"));
1.1 root 1636:
1637: (void) do_close(in);
1638:
1639: (void) do_close(out);
1640:
1641: return ENHNDL;
1642:
1643: }
1644:
1645: curproc->handle[i] = in; curproc->handle[j] = out;
1646:
1647: /* leave pipes open across Pexec */
1648:
1649: curproc->fdflags[i] = 0;
1650:
1651: curproc->fdflags[j] = 0;
1652:
1653:
1654:
1655: usrh[0] = i;
1656:
1657: usrh[1] = j;
1658:
1.1.1.2 root 1659: TRACE(("Fpipe: returning 0: input %d output %d",i,j));
1.1 root 1660:
1661: return 0;
1662:
1663: }
1664:
1665:
1666:
1667: /*
1668:
1669: * f_cntl: a combination "ioctl" and "fcntl". Some functions are
1670:
1671: * handled here, if they apply to the file descriptors directly
1672:
1673: * (e.g. F_DUPFD) or if they're easily translated into file system
1674:
1675: * functions (e.g. FSTAT). Others are passed on to the device driver
1676:
1677: * via dev->ioctl.
1678:
1679: */
1680:
1681:
1682:
1.1.1.2 root 1683: long ARGS_ON_STACK
1.1 root 1684:
1685: f_cntl(fh, arg, cmd)
1686:
1687: int fh;
1688:
1689: long arg;
1690:
1691: int cmd;
1692:
1693: {
1694:
1695: FILEPTR *f;
1696:
1697: PROC *proc;
1698:
1699: struct flock *fl;
1700:
1701: long r;
1702:
1703:
1704:
1.1.1.2 root 1705: TRACE(("Fcntl(%d, cmd=0x%x)", fh, cmd));
1.1 root 1706:
1707: #if O_GLOBAL
1708:
1709: if (fh >= 100) {
1710:
1711: fh -= 100;
1712:
1713: proc = rootproc;
1714:
1715: }
1716:
1717: else
1718:
1719: #endif
1720:
1721: proc = curproc;
1722:
1723:
1724:
1725: if (fh < MIN_HANDLE || fh >= MAX_OPEN) {
1726:
1.1.1.2 root 1727: DEBUG(("Fcntl: bad file handle"));
1.1 root 1728:
1729: return EIHNDL;
1730:
1731: }
1732:
1733:
1734:
1735: if (cmd == F_DUPFD) {
1736:
1737: #if O_GLOBAL
1738:
1739: if (proc != curproc) fh += 100;
1740:
1741: #endif
1742:
1743: return do_dup(fh, (int)arg);
1744:
1745: }
1746:
1747:
1748:
1749: f = proc->handle[fh];
1750:
1751: if (!f) return EIHNDL;
1752:
1753:
1754:
1755: switch(cmd) {
1756:
1757: case F_GETFD:
1758:
1.1.1.2 root 1759: TRACE(("Fcntl F_GETFD"));
1.1 root 1760:
1761: if (fh < 0) return EIHNDL;
1762:
1763: return proc->fdflags[fh];
1764:
1765: case F_SETFD:
1766:
1.1.1.2 root 1767: TRACE(("Fcntl F_SETFD"));
1.1 root 1768:
1769: if (fh < 0) return EIHNDL;
1770:
1771: proc->fdflags[fh] = arg;
1772:
1773: return 0;
1774:
1775: case F_GETFL:
1776:
1.1.1.2 root 1777: TRACE(("Fcntl F_GETFL"));
1.1 root 1778:
1779: return f->flags & O_USER;
1780:
1781: case F_SETFL:
1782:
1.1.1.2 root 1783: TRACE(("Fcntl F_SETFL"));
1.1 root 1784:
1785: arg &= O_USER; /* make sure only user bits set */
1786:
1.1.1.3 root 1787: #if 0
1788:
1.1 root 1789: /* COMPATIBILITY WITH OLD VERSIONS ONLY */
1790:
1791: /* THIS CODE WILL GO AWAY. REALLY! */
1792:
1793: if (arg & 4) {
1794:
1795: arg |= O_NDELAY;
1796:
1797: arg &= ~4;
1798:
1799: }
1800:
1.1.1.3 root 1801: #endif
1802:
1.1 root 1803:
1804:
1805: /* make sure the file access and sharing modes are not changed */
1806:
1807: arg &= ~(O_RWMODE|O_SHMODE);
1808:
1809: arg |= f->flags & (O_RWMODE|O_SHMODE);
1810:
1811: f->flags &= ~O_USER; /* set user bits to arg */
1812:
1813: f->flags |= arg;
1814:
1815: return 0;
1816:
1817: case FSTAT:
1818:
1819: return (*f->fc.fs->getxattr)(&f->fc, (XATTR *)arg);
1820:
1821: case F_SETLK:
1822:
1.1.1.2 root 1823: case F_SETLKW:
1824:
1.1 root 1825: /* make sure that the file was opened with appropriate permissions */
1826:
1827: fl = (struct flock *)arg;
1828:
1829: if (fl->l_type == F_RDLCK) {
1830:
1831: if ( (f->flags & O_RWMODE) == O_WRONLY )
1832:
1833: return EACCDN;
1834:
1835: } else {
1836:
1837: if ( (f->flags & O_RWMODE) == O_RDONLY )
1838:
1839: return EACCDN;
1840:
1841: }
1842:
1843: /* fall through to device ioctl */
1844:
1845: default:
1846:
1.1.1.2 root 1847: TRACE(("Fcntl mode %x: calling ioctl",cmd));
1.1 root 1848:
1849: r = (*f->dev->ioctl)(f, cmd, (void *)arg);
1850:
1851: if (r == EINVFN && is_terminal(f)) {
1852:
1853: r = tty_ioctl(f, cmd, (void *)arg);
1854:
1855: }
1856:
1857: return r;
1858:
1859: }
1860:
1861: }
1862:
1863:
1864:
1865: /*
1866:
1867: * fselect(timeout, rfd, wfd, xfd)
1868:
1869: * timeout is an (unsigned) 16 bit integer giving the maximum number
1870:
1871: * of milliseconds to wait; rfd, wfd, and xfd are pointers to 32 bit
1872:
1873: * integers containing bitmasks that describe which file descriptors
1874:
1875: * we're interested in. These masks are changed to represent which
1876:
1877: * file descriptors actually have data waiting (rfd), are ready to
1878:
1879: * output (wfd), or have exceptional conditions (xfd -- currently
1880:
1881: * ignored). If timeout is 0, fselect blocks until some file descriptor
1882:
1883: * is ready; otherwise, it waits only "timeout" milliseconds.
1884:
1885: * Return value: number of file descriptors that are available for
1886:
1887: * reading/writing; or a negative error number.
1888:
1889: */
1890:
1891:
1892:
1893: /* helper function for time outs */
1894:
1895: static void
1896:
1897: unselectme(p)
1898:
1899: PROC *p;
1900:
1901: {
1902:
1903: wakeselect((long)p);
1904:
1905: }
1906:
1907:
1908:
1.1.1.2 root 1909: long ARGS_ON_STACK
1.1 root 1910:
1911: f_select(timeout, rfdp, wfdp, xfdp)
1912:
1913: unsigned timeout;
1914:
1915: long *rfdp, *wfdp, *xfdp;
1916:
1917: {
1918:
1919: long rfd, wfd;
1920:
1921: long mask, bytes;
1922:
1923: int i, count;
1924:
1925: FILEPTR *f;
1926:
1927: PROC *p;
1928:
1929: TIMEOUT *t;
1930:
1.1.1.3 root 1931: short sr;
1932:
1.1 root 1933:
1934:
1.1.1.3 root 1935: if (xfdp)
1936:
1937: *xfdp = 0;
1.1.1.2 root 1938:
1939:
1940:
1.1 root 1941: if (rfdp) {
1942:
1943: rfd = *rfdp; *rfdp = 0;
1944:
1945: }
1946:
1947: else
1948:
1949: rfd = 0;
1950:
1951: if (wfdp) {
1952:
1953: wfd = *wfdp; *wfdp = 0;
1954:
1955: }
1956:
1957: else
1958:
1959: wfd = 0;
1960:
1961:
1962:
1.1.1.2 root 1963: TRACE(("Fselect(%u, %lx, %lx)", timeout, rfd, wfd));
1.1 root 1964:
1965: p = curproc; /* help the optimizer out */
1966:
1967:
1968:
1969: /* first, validate the masks */
1970:
1971: mask = 1L;
1972:
1973: for (i = 0; i < MAX_OPEN; i++) {
1974:
1975: if ( ((rfd & mask) || (wfd & mask)) && !(p->handle[i]) ) {
1976:
1.1.1.4 ! root 1977: DEBUG(("Fselect: invalid handle: %d", i));
1.1 root 1978:
1979: return EIHNDL;
1980:
1981: }
1982:
1983: mask = mask << 1L;
1984:
1985: }
1986:
1987:
1988:
1989: /* now, loop through the file descriptors, setting up the select process */
1990:
1991: /* NOTE: wakeselect will set p->wait_cond to 0 if data arrives during the
1992:
1993: * selection
1994:
1995: * Also note: because of the validation above, we may assume that the
1996:
1997: * file handles are valid here. However, this assumption may no longer
1998:
1999: * be true after we've gone to sleep, since a signal handler may have
2000:
2001: * closed one of the handles.
2002:
2003: */
2004:
2005:
2006:
2007: mask = 1L;
2008:
2009: count = 0;
2010:
1.1.1.2 root 2011: curproc->wait_cond = (long)wakeselect; /* flag */
1.1 root 2012:
2013:
2014:
2015: for (i = 0; i < MAX_OPEN; i++) {
2016:
2017: if (rfd & mask) {
2018:
2019: f = p->handle[i];
2020:
2021: if ((*f->dev->select)(f, (long)p, O_RDONLY)) {
2022:
2023: count++;
2024:
2025: *rfdp |= mask;
2026:
2027: }
2028:
2029: }
2030:
2031: if (wfd & mask) {
2032:
2033: f = p->handle[i];
2034:
2035: if ((*f->dev->select)(f, (long)p, O_WRONLY)) {
2036:
2037: count++;
2038:
2039: *wfdp |= mask;
2040:
2041: }
2042:
2043: }
2044:
2045: mask = mask << 1L;
2046:
2047: }
2048:
2049:
2050:
2051: if (count == 0) {
2052:
2053: /* OK, now let's set a timeout */
2054:
2055:
2056:
2057: if (timeout) {
2058:
2059: t = addtimeout((long)timeout, unselectme);
2060:
2061: } else {
2062:
2063: t = 0;
2064:
2065: }
2066:
2067:
2068:
1.1.1.3 root 2069: sr = spl7();
2070:
2071:
2072:
1.1 root 2073: /* curproc->wait_cond changes when data arrives or the timeout happens */
2074:
1.1.1.2 root 2075: while (curproc->wait_cond == (long)wakeselect) {
1.1 root 2076:
1.1.1.2 root 2077: TRACE(("sleeping in Fselect"));
1.1 root 2078:
1.1.1.2 root 2079: sleep(SELECT_Q, (long)wakeselect);
1.1 root 2080:
2081: }
2082:
1.1.1.3 root 2083: spl(sr);
2084:
1.1 root 2085:
2086:
2087: /* we can cancel the time out now (if it hasn't already happened) */
2088:
2089: if (t) canceltimeout(t);
2090:
2091:
2092:
2093: /* OK, let's see what data arrived (if any) */
2094:
2095: mask = 1L;
2096:
2097: for (i = 0; i < MAX_OPEN; i++) {
2098:
2099: if (rfd & mask) {
2100:
2101: f = p->handle[i];
2102:
2103: if (f) {
2104:
2105: bytes = 1L;
2106:
2107: (void)(*f->dev->ioctl)(f, FIONREAD,&bytes);
2108:
2109: if (bytes > 0) {
2110:
2111: *rfdp |= mask;
2112:
2113: count++;
2114:
2115: }
2116:
2117: }
2118:
2119: }
2120:
2121: if (wfd & mask) {
2122:
2123: f = p->handle[i];
2124:
2125: if (f) {
2126:
2127: bytes = 1L;
2128:
2129: (void)(*f->dev->ioctl)(f, FIONWRITE,&bytes);
2130:
2131: if (bytes > 0) {
2132:
2133: *wfdp |= mask;
2134:
2135: count++;
2136:
2137: }
2138:
2139: }
2140:
2141: }
2142:
2143: mask = mask << 1L;
2144:
2145: }
2146:
2147: }
2148:
2149:
2150:
2151: /* at this point, we either have data or a time out */
2152:
2153: /* cancel all the selects */
2154:
2155: mask = 1L;
2156:
2157:
2158:
2159: for (i = 0; i < MAX_OPEN; i++) {
2160:
2161: if (rfd & mask) {
2162:
2163: f = p->handle[i];
2164:
2165: if (f)
2166:
2167: (*f->dev->unselect)(f, (long)p, O_RDONLY);
2168:
2169: }
2170:
2171: if (wfd & mask) {
2172:
2173: f = p->handle[i];
2174:
2175: if (f)
2176:
2177: (*f->dev->unselect)(f, (long)p, O_WRONLY);
2178:
2179: }
2180:
2181: mask = mask << 1L;
2182:
2183: }
2184:
2185:
2186:
1.1.1.2 root 2187: TRACE(("Fselect: returning %d", count));
1.1 root 2188:
2189: return count;
2190:
2191: }
2192:
2193:
2194:
2195:
2196:
2197: /*
2198:
2199: * GEMDOS extension: Fmidipipe
2200:
2201: * Fmidipipe(pid, in, out) manipultes the MIDI file handles (handles -4 and -5)
2202:
2203: * of process "pid" so that they now point to the files with handles "in" and
2204:
2205: * "out" in the calling process
2206:
2207: */
2208:
2209:
2210:
1.1.1.2 root 2211: long ARGS_ON_STACK
1.1 root 2212:
2213: f_midipipe(pid, in, out)
2214:
2215: int pid, in, out;
2216:
2217: {
2218:
2219: PROC *p;
2220:
2221: FILEPTR *fin, *fout;
2222:
2223:
2224:
2225: /* first, find the process */
2226:
2227:
2228:
2229: if (pid == 0)
2230:
2231: p = curproc;
2232:
2233: else {
2234:
2235: p = pid2proc(pid);
2236:
2237: if (!p)
2238:
2239: return EFILNF;
2240:
2241: }
2242:
2243:
2244:
2245: /* next, validate the input and output file handles */
2246:
1.1.1.2 root 2247: if (in < MIN_HANDLE || in >= MAX_OPEN || (0==(fin = curproc->handle[in])))
1.1 root 2248:
2249: return EIHNDL;
2250:
2251: if ( (fin->flags & O_RWMODE) == O_WRONLY ) {
2252:
1.1.1.2 root 2253: DEBUG(("Fmidipipe: input side is write only"));
1.1 root 2254:
2255: return EACCDN;
2256:
2257: }
2258:
1.1.1.2 root 2259: if (out < MIN_HANDLE || out >= MAX_OPEN || (0==(fout = curproc->handle[out])))
1.1 root 2260:
2261: return EIHNDL;
2262:
2263: if ( (fout->flags & O_RWMODE) == O_RDONLY ) {
2264:
1.1.1.2 root 2265: DEBUG(("Fmidipipe: output side is read only"));
1.1 root 2266:
2267: return EACCDN;
2268:
2269: }
2270:
2271:
2272:
2273: /* OK, duplicate the handles and put them in the new process */
2274:
2275: fin->links++; fout->links++;
2276:
2277: (void)do_pclose(p, p->midiin);
2278:
2279: (void)do_pclose(p, p->midiout);
2280:
2281: p->midiin = fin; p->midiout = fout;
2282:
2283: return 0;
2284:
2285: }
2286:
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