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comparison miscellany/libndir/readdir.c @ 0:bce86c4163a3

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Initial revision
author kono
date Mon, 18 Apr 2005 23:46:02 +0900
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-1:000000000000 0:bce86c4163a3
1 static char sccsid[] = "@(#)readdir.c 4.1 (Berkeley) 83/03/21";
2
3 #include <sys/types.h>
4 #include <dir.h>
5
6 /*
7 * read an old stlye directory entry and present it as a new one
8 */
9 #define ODIRSIZ 14
10
11 struct olddirect {
12 ino_t od_ino;
13 char od_name[ODIRSIZ];
14 };
15
16 /*
17 * get next entry in a directory.
18 */
19 struct direct *
20 readdir(dirp)
21 register DIR *dirp;
22 {
23 register struct olddirect *dp;
24 static struct direct dir;
25
26 for (;;) {
27 if (dirp->dd_loc == 0) {
28 dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
29 DIRBLKSIZ);
30 if (dirp->dd_size <= 0)
31 return NULL;
32 }
33 if (dirp->dd_loc >= dirp->dd_size) {
34 dirp->dd_loc = 0;
35 continue;
36 }
37 dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
38 dirp->dd_loc += sizeof(struct olddirect);
39 if (dp->od_ino == 0)
40 continue;
41 dir.d_ino = dp->od_ino;
42 strncpy(dir.d_name, dp->od_name, ODIRSIZ);
43 dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
44 dir.d_namlen = strlen(dir.d_name);
45 dir.d_reclen = DIRBLKSIZ;
46 return (&dir);
47 }
48 }