1 /*
2 * Copyright (c) 1983 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include <sys/types.h>
35 #include <sys/param.h>
36 #include <dirent.h>
37 #include <stdlib.h>
38 #include <unistd.h>
39 #include <fcntl.h>
40 #include "dirloc.h"
41
42 static long dd_loccnt; /* Index of entry for sequential telldir's */
43 /*
44 * return a pointer into a directory
45 */
46 long
telldir(dirp)47 telldir(dirp)
48 const DIR *dirp;
49 {
50 register struct ddloc *lp, **fakeout;
51
52 if (lp = (struct ddloc *)malloc(sizeof(struct ddloc))) {
53 lp->loc_index = dd_loccnt++;
54 lp->loc_seek = dirp->dd_seek;
55 lp->loc_loc = dirp->dd_loc;
56 lp->loc_next = dirp->dd_ddloc;
57
58 /* Compiler won't let us change anything pointed to by db directly */
59 /* So we fake to the left and do it anyway */
60 /* Wonder if the compile optomizes it to the correct solution */
61 fakeout = (struct ddloc **)&(dirp->dd_ddloc);
62 *fakeout = lp;
63
64 return (lp->loc_index);
65 }
66 return (-1);
67 }
68