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