78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/*
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* Derived from Berkeley source code. Those parts are
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)readdir.c 5.7 (Berkeley) 6/1/90";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <pmachine.h>
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#ifdef USE_SYS_DIR_H
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#include <sys/dir.h>
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#else
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#include <dirent.h>
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#endif
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/*
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* get next entry in a directory.
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*/
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struct dirent *
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readdir(dirp)
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register DIR *dirp;
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{
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register struct dirent *dp;
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for (;;) {
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if (dirp->dd_loc == 0) {
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if(dirp->dd_fd >= 0)
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#if defined(SUNOS)
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dirp->dd_size = getdents(dirp->dd_fd,
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dirp->dd_buf, dirp->dd_bsize);
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#else
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dirp->dd_size = getdirentries(dirp->dd_fd,
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dirp->dd_buf, dirp->dd_bsize, &dirp->dd_bbase);
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#endif
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else
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dirp->dd_size = p__getvdirentries(dirp->dd_fd,
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dirp->dd_buf, dirp->dd_bsize, &dirp->dd_bbase);
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if (dirp->dd_size <= 0)
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return NULL;
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}
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if (dirp->dd_loc >= dirp->dd_size) {
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dirp->dd_loc = 0;
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continue;
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}
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dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
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if ((int)dp & 03) /* bogus pointer check */
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return NULL;
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#if defined(SUNOS)
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dirp->dd_bbase = dp->d_off;
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#endif
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if (dp->d_reclen <= 0 ||
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dp->d_reclen > dirp->dd_bsize + 1 - dirp->dd_loc)
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return NULL;
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dirp->dd_loc += dp->d_reclen;
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if (dp->d_ino == 0)
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continue;
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return (dp);
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}
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}
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