1 /* $OpenBSD: readdir.c,v 1.6 2003/06/02 20:20:53 mickey 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(name) 42 char *name; 43 { 44 int fd; 45 struct stat sb; 46 47 if (stat(name, &sb) < 0) 48 return -1; 49 50 if (!S_ISDIR(sb.st_mode)) { 51 errno = ENOTDIR; 52 return -1; 53 } 54 55 /* XXX rewind needed for some dirs */ 56 #ifdef __INTERNAL_LIBSA_CREAD 57 if ((fd = oopen(name, O_RDONLY)) >= 0) 58 olseek(fd, 0, 0); 59 #else 60 if ((fd = open(name, O_RDONLY)) >= 0) 61 lseek(fd, 0, 0); 62 #endif 63 64 return fd; 65 } 66 67 int 68 readdir(fd, dest) 69 int fd; 70 char *dest; 71 { 72 register struct open_file *f = &files[fd]; 73 74 if (fd < 0 || fd >= SOPEN_MAX || 75 !((f = &files[fd])->f_flags & F_READ)) { 76 errno = EBADF; 77 return (-1); 78 } 79 80 if (f->f_flags & F_RAW) { 81 errno = EOPNOTSUPP; 82 return (-1); 83 } 84 if ((errno = (f->f_ops->readdir)(f, dest))) 85 return (-1); 86 87 return 0; 88 } 89 90 void 91 closedir(fd) 92 int fd; 93 { 94 #ifdef __INTERNAL_LIBSA_CREAD 95 oclose(fd); 96 #else 97 close(fd); 98 #endif 99 } 100 101 #endif /* NO_READDIR */ 102