1 46f79934 2005-01-04 devnull /* Mostly copied from Plan 9's libc. */
  2 46f79934 2005-01-04 devnull 
  3 46f79934 2005-01-04 devnull #include <u.h>
  4 46f79934 2005-01-04 devnull #include <libc.h>
  5 46f79934 2005-01-04 devnull #include <fcall.h>
  6 46f79934 2005-01-04 devnull #include <9pclient.h>
  7 382ae73f 2008-07-04 rsc #include "fsimpl.h"
  8 46f79934 2005-01-04 devnull 
  9 46f79934 2005-01-04 devnull static long
 10 74dd0321 2010-12-07 rsc dirpackage(uchar *buf, long ts, Dir **d)
 11 46f79934 2005-01-04 devnull {
 12 46f79934 2005-01-04 devnull 	char *s;
 13 46f79934 2005-01-04 devnull 	long ss, i, n, nn, m;
 14 46f79934 2005-01-04 devnull 
 15 46f79934 2005-01-04 devnull 	*d = nil;
 16 46f79934 2005-01-04 devnull 	if(ts <= 0)
 17 46f79934 2005-01-04 devnull 		return 0;
 18 46f79934 2005-01-04 devnull 
 19 46f79934 2005-01-04 devnull 	/*
 20 46f79934 2005-01-04 devnull 	 * first find number of all stats, check they look like stats, & size all associated strings
 21 46f79934 2005-01-04 devnull 	 */
 22 46f79934 2005-01-04 devnull 	ss = 0;
 23 46f79934 2005-01-04 devnull 	n = 0;
 24 46f79934 2005-01-04 devnull 	for(i = 0; i < ts; i += m){
 25 46f79934 2005-01-04 devnull 		m = BIT16SZ + GBIT16(&buf[i]);
 26 74dd0321 2010-12-07 rsc 		if(statcheck(&buf[i], m) < 0)
 27 46f79934 2005-01-04 devnull 			break;
 28 46f79934 2005-01-04 devnull 		ss += m;
 29 46f79934 2005-01-04 devnull 		n++;
 30 46f79934 2005-01-04 devnull 	}
 31 46f79934 2005-01-04 devnull 
 32 46f79934 2005-01-04 devnull 	if(i != ts)
 33 46f79934 2005-01-04 devnull 		return -1;
 34 46f79934 2005-01-04 devnull 
 35 46f79934 2005-01-04 devnull 	*d = malloc(n * sizeof(Dir) + ss);
 36 46f79934 2005-01-04 devnull 	if(*d == nil)
 37 46f79934 2005-01-04 devnull 		return -1;
 38 46f79934 2005-01-04 devnull 
 39 46f79934 2005-01-04 devnull 	/*
 40 46f79934 2005-01-04 devnull 	 * then convert all buffers
 41 46f79934 2005-01-04 devnull 	 */
 42 46f79934 2005-01-04 devnull 	s = (char*)*d + n * sizeof(Dir);
 43 46f79934 2005-01-04 devnull 	nn = 0;
 44 46f79934 2005-01-04 devnull 	for(i = 0; i < ts; i += m){
 45 46f79934 2005-01-04 devnull 		m = BIT16SZ + GBIT16((uchar*)&buf[i]);
 46 74dd0321 2010-12-07 rsc 		if(nn >= n || convM2D(&buf[i], m, *d + nn, s) != m){
 47 46f79934 2005-01-04 devnull 			free(*d);
 48 46f79934 2005-01-04 devnull 			*d = nil;
 49 46f79934 2005-01-04 devnull 			return -1;
 50 46f79934 2005-01-04 devnull 		}
 51 46f79934 2005-01-04 devnull 		nn++;
 52 46f79934 2005-01-04 devnull 		s += m;
 53 46f79934 2005-01-04 devnull 	}
 54 46f79934 2005-01-04 devnull 
 55 46f79934 2005-01-04 devnull 	return nn;
 56 46f79934 2005-01-04 devnull }
 57 46f79934 2005-01-04 devnull 
 58 46f79934 2005-01-04 devnull long
 59 46f79934 2005-01-04 devnull fsdirread(CFid *fid, Dir **d)
 60 46f79934 2005-01-04 devnull {
 61 46f79934 2005-01-04 devnull 	uchar *buf;
 62 46f79934 2005-01-04 devnull 	long ts;
 63 46f79934 2005-01-04 devnull 
 64 46f79934 2005-01-04 devnull 	buf = malloc(DIRMAX);
 65 46f79934 2005-01-04 devnull 	if(buf == nil)
 66 46f79934 2005-01-04 devnull 		return -1;
 67 46f79934 2005-01-04 devnull 	ts = fsread(fid, buf, DIRMAX);
 68 46f79934 2005-01-04 devnull 	if(ts >= 0)
 69 74dd0321 2010-12-07 rsc 		ts = dirpackage(buf, ts, d);
 70 46f79934 2005-01-04 devnull 	free(buf);
 71 46f79934 2005-01-04 devnull 	return ts;
 72 46f79934 2005-01-04 devnull }
 73 46f79934 2005-01-04 devnull 
 74 46f79934 2005-01-04 devnull long
 75 46f79934 2005-01-04 devnull fsdirreadall(CFid *fid, Dir **d)
 76 46f79934 2005-01-04 devnull {
 77 46f79934 2005-01-04 devnull 	uchar *buf, *nbuf;
 78 46f79934 2005-01-04 devnull 	long n, ts;
 79 46f79934 2005-01-04 devnull 
 80 46f79934 2005-01-04 devnull 	buf = nil;
 81 46f79934 2005-01-04 devnull 	ts = 0;
 82 46f79934 2005-01-04 devnull 	for(;;){
 83 46f79934 2005-01-04 devnull 		nbuf = realloc(buf, ts+DIRMAX);
 84 46f79934 2005-01-04 devnull 		if(nbuf == nil){
 85 46f79934 2005-01-04 devnull 			free(buf);
 86 46f79934 2005-01-04 devnull 			return -1;
 87 46f79934 2005-01-04 devnull 		}
 88 46f79934 2005-01-04 devnull 		buf = nbuf;
 89 46f79934 2005-01-04 devnull 		n = fsread(fid, buf+ts, DIRMAX);
 90 46f79934 2005-01-04 devnull 		if(n <= 0)
 91 46f79934 2005-01-04 devnull 			break;
 92 46f79934 2005-01-04 devnull 		ts += n;
 93 46f79934 2005-01-04 devnull 	}
 94 f53117fb 2006-06-26 devnull 	if(ts >= 0){
 95 74dd0321 2010-12-07 rsc 		ts = dirpackage(buf, ts, d);
 96 f53117fb 2006-06-26 devnull 		if(ts < 0)
 97 74dd0321 2010-12-07 rsc 			werrstr("malformed directory contents");
 98 f53117fb 2006-06-26 devnull 	}
 99 46f79934 2005-01-04 devnull 	free(buf);
100 46f79934 2005-01-04 devnull 	if(ts == 0 && n < 0)
101 46f79934 2005-01-04 devnull 		return -1;
102 46f79934 2005-01-04 devnull 	return ts;
103 46f79934 2005-01-04 devnull }