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Annotation of sys/lib/libsa/readdir.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: readdir.c,v 1.8 2006/10/11 20:56:59 deraadt Exp $     */
                      2:
                      3: /*
                      4:  * Copyright (c) 1996 Michael Shalayeff
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  *
                     16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
                     18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     19:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     20:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     26:  * SUCH DAMAGE.
                     27:  *
                     28:  */
                     29:
                     30: #ifndef NO_READDIR
                     31:
                     32: #include <sys/types.h>
                     33: #include <sys/stat.h>
                     34: #define _KERNEL
                     35: #include <sys/fcntl.h>
                     36: #undef _KERNEL
                     37: #include "stand.h"
                     38:
                     39:
                     40: int
                     41: opendir(char *name)
                     42: {
                     43:        struct stat sb;
                     44:        int fd;
                     45:
                     46:        if (stat(name, &sb) < 0)
                     47:                return -1;
                     48:
                     49:        if (!S_ISDIR(sb.st_mode)) {
                     50:                errno = ENOTDIR;
                     51:                return -1;
                     52:        }
                     53:
                     54:        /* XXX rewind needed for some dirs */
                     55: #ifdef __INTERNAL_LIBSA_CREAD
                     56:        if ((fd = oopen(name, O_RDONLY)) >= 0)
                     57:                olseek(fd, 0, 0);
                     58: #else
                     59:        if ((fd = open(name, O_RDONLY)) >= 0)
                     60:                lseek(fd, 0, SEEK_SET);
                     61: #endif
                     62:
                     63:        return fd;
                     64: }
                     65:
                     66: int
                     67: readdir(int fd, char *dest)
                     68: {
                     69:        struct open_file *f = &files[fd];
                     70:
                     71:        if (fd < 0 || fd >= SOPEN_MAX ||
                     72:            !((f = &files[fd])->f_flags & F_READ)) {
                     73:                errno = EBADF;
                     74:                return (-1);
                     75:        }
                     76:
                     77:        if (f->f_flags & F_RAW) {
                     78:                errno = EOPNOTSUPP;
                     79:                return (-1);
                     80:        }
                     81:        if ((errno = (f->f_ops->readdir)(f, dest)))
                     82:                return (-1);
                     83:
                     84:        return 0;
                     85: }
                     86:
                     87: void
                     88: closedir(int fd)
                     89: {
                     90: #ifdef __INTERNAL_LIBSA_CREAD
                     91:        oclose(fd);
                     92: #else
                     93:        close(fd);
                     94: #endif
                     95: }
                     96:
                     97: #endif /* NO_READDIR */