121355Sdist /* 261111Sbostic * Copyright (c) 1983, 1993 361111Sbostic * The Regents of the University of California. All rights reserved. 434790Sbostic * 542625Sbostic * %sccs.include.redist.c% 621355Sdist */ 721355Sdist 826579Sdonn #if defined(LIBC_SCCS) && !defined(lint) 9*67575Spendry static char sccsid[] = "@(#)readdir.c 8.2 (Berkeley) 07/28/94"; 1034790Sbostic #endif /* LIBC_SCCS and not lint */ 115751Smckusick 126370Smckusic #include <sys/param.h> 1336545Smckusick #include <dirent.h> 145751Smckusick 155751Smckusick /* 165751Smckusick * get next entry in a directory. 175751Smckusick */ 1836545Smckusick struct dirent * 195751Smckusick readdir(dirp) 205751Smckusick register DIR *dirp; 215751Smckusick { 2236545Smckusick register struct dirent *dp; 235751Smckusick 245751Smckusick for (;;) { 25*67575Spendry if (dirp->dd_loc >= dirp->dd_size) { 26*67575Spendry if (dirp->dd_flags & __DTF_READALL) 27*67575Spendry return (NULL); 28*67575Spendry dirp->dd_loc = 0; 29*67575Spendry } 30*67575Spendry if (dirp->dd_loc == 0 && !(dirp->dd_flags & __DTF_READALL)) { 3138435Smckusick dirp->dd_size = getdirentries(dirp->dd_fd, 3238435Smckusick dirp->dd_buf, dirp->dd_len, &dirp->dd_seek); 335751Smckusick if (dirp->dd_size <= 0) 34*67575Spendry return (NULL); 355751Smckusick } 3636545Smckusick dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc); 3734756Sbostic if ((int)dp & 03) /* bogus pointer check */ 38*67575Spendry return (NULL); 396712Smckusick if (dp->d_reclen <= 0 || 4038435Smckusick dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc) 41*67575Spendry return (NULL); 426712Smckusick dirp->dd_loc += dp->d_reclen; 435766Smckusic if (dp->d_ino == 0) 445766Smckusic continue; 456712Smckusick return (dp); 465751Smckusick } 475751Smckusick } 48