1 /* $OpenBSD: readdir.c,v 1.9 2014/11/19 20:28:56 miod 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 int 40 opendir(const char *name) 41 { 42 struct stat sb; 43 int fd; 44 45 if (stat(name, &sb) < 0) 46 return -1; 47 48 if (!S_ISDIR(sb.st_mode)) { 49 errno = ENOTDIR; 50 return -1; 51 } 52 53 /* XXX rewind needed for some dirs */ 54 #ifdef __INTERNAL_LIBSA_CREAD 55 if ((fd = oopen(name, O_RDONLY)) >= 0) 56 olseek(fd, 0, 0); 57 #else 58 if ((fd = open(name, O_RDONLY)) >= 0) 59 lseek(fd, 0, SEEK_SET); 60 #endif 61 62 return fd; 63 } 64 65 int 66 readdir(int fd, char *dest) 67 { 68 struct open_file *f = &files[fd]; 69 70 if (fd < 0 || fd >= SOPEN_MAX || 71 !((f = &files[fd])->f_flags & F_READ)) { 72 errno = EBADF; 73 return (-1); 74 } 75 76 if (f->f_flags & F_RAW) { 77 errno = EOPNOTSUPP; 78 return (-1); 79 } 80 if ((errno = (f->f_ops->readdir)(f, dest))) 81 return (-1); 82 83 return 0; 84 } 85 86 void 87 closedir(int fd) 88 { 89 #ifdef __INTERNAL_LIBSA_CREAD 90 oclose(fd); 91 #else 92 close(fd); 93 #endif 94 } 95 96 #endif /* NO_READDIR */ 97