Return to seekdir.c CVS log

Up to [CSRG BSD Unix] / 42BSD / lib / libc / gen

Annotation of 42BSD/lib/libc/gen/seekdir.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)seekdir.c  4.10 (Berkeley) 7/1/83";
                      3: #endif
                      4: 
                      5: #include <sys/param.h>
                      6: #include <sys/dir.h>
                      7: 
                      8: /*
                      9:  * seek to an entry in a directory.
                     10:  * Only values returned by "telldir" should be passed to seekdir.
                     11:  */
                     12: void
                     13: seekdir(dirp, loc)
                     14:        register DIR *dirp;
                     15:        long loc;
                     16: {
                     17:        long curloc, base, offset;
                     18:        struct direct *dp;
                     19:        extern long lseek();
                     20: 
                     21:        curloc = telldir(dirp);
                     22:        if (loc == curloc)
                     23:                return;
                     24:        base = loc & ~(DIRBLKSIZ - 1);
                     25:        offset = loc & (DIRBLKSIZ - 1);
                     26:        (void) lseek(dirp->dd_fd, base, 0);
                     27:        dirp->dd_loc = 0;
                     28:        while (dirp->dd_loc < offset) {
                     29:                dp = readdir(dirp);
                     30:                if (dp == NULL)
                     31:                        return;
                     32:        }
                     33: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.