1*48659Sbostic static char sccsid[] = "@(#)readdir.c 4.3 8/8/82";
2*48659Sbostic 
3*48659Sbostic #include <sys/types.h>
4*48659Sbostic #include <ndir.h>
5*48659Sbostic 
6*48659Sbostic /*
7*48659Sbostic  * read an old stlye directory entry and present it as a new one
8*48659Sbostic  */
9*48659Sbostic #define	ODIRSIZ	14
10*48659Sbostic 
11*48659Sbostic struct	olddirect {
12*48659Sbostic 	ino_t	od_ino;
13*48659Sbostic 	char	od_name[ODIRSIZ];
14*48659Sbostic };
15*48659Sbostic 
16*48659Sbostic /*
17*48659Sbostic  * get next entry in a directory.
18*48659Sbostic  */
19*48659Sbostic struct direct *
readdir(dirp)20*48659Sbostic readdir(dirp)
21*48659Sbostic 	register DIR *dirp;
22*48659Sbostic {
23*48659Sbostic 	register struct olddirect *dp;
24*48659Sbostic 	static struct direct dir;
25*48659Sbostic 
26*48659Sbostic 	for (;;) {
27*48659Sbostic 		if (dirp->dd_loc == 0) {
28*48659Sbostic 			dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
29*48659Sbostic 			    DIRBLKSIZ);
30*48659Sbostic 			if (dirp->dd_size <= 0)
31*48659Sbostic 				return NULL;
32*48659Sbostic 		}
33*48659Sbostic 		if (dirp->dd_loc >= dirp->dd_size) {
34*48659Sbostic 			dirp->dd_loc = 0;
35*48659Sbostic 			continue;
36*48659Sbostic 		}
37*48659Sbostic 		dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
38*48659Sbostic 		dirp->dd_loc += sizeof(struct olddirect);
39*48659Sbostic 		if (dp->od_ino == 0)
40*48659Sbostic 			continue;
41*48659Sbostic 		dir.d_ino = dp->od_ino;
42*48659Sbostic 		strncpy(dir.d_name, dp->od_name, ODIRSIZ);
43*48659Sbostic 		dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
44*48659Sbostic 		dir.d_namlen = strlen(dir.d_name);
45*48659Sbostic 		dir.d_reclen = DIRBLKSIZ;
46*48659Sbostic 		return (&dir);
47*48659Sbostic 	}
48*48659Sbostic }
49