1/* $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp $ */
2/*
3 * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
26
27#if !defined(_POSIX_C_SOURCE)
28#define _POSIX_C_SOURCE 1  /* for readdir_r */
29#endif
30
31#include "directory.h"
32
33
34#if !defined(OPENSSL_WINDOWS)
35
36#include <dirent.h>
37#include <errno.h>
38
39#if defined(OPENSSL_PNACL)
40/* pnacl doesn't include readdir_r! So we do the best we can. */
41int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result) {
42  errno = 0;
43  *result = readdir(dirp);
44  if (*result != NULL) {
45    return 0;
46  }
47  if (errno) {
48    return 1;
49  }
50  return 0;
51}
52#endif
53
54struct OPENSSL_dir_context_st {
55  DIR *dir;
56  struct dirent dirent;
57};
58
59const char *OPENSSL_DIR_read(OPENSSL_DIR_CTX **ctx, const char *directory) {
60  struct dirent *dirent;
61
62  if (ctx == NULL || directory == NULL) {
63    errno = EINVAL;
64    return NULL;
65  }
66
67  errno = 0;
68  if (*ctx == NULL) {
69    *ctx = malloc(sizeof(OPENSSL_DIR_CTX));
70    if (*ctx == NULL) {
71      errno = ENOMEM;
72      return 0;
73    }
74    memset(*ctx, 0, sizeof(OPENSSL_DIR_CTX));
75
76    (*ctx)->dir = opendir(directory);
77    if ((*ctx)->dir == NULL) {
78      int save_errno = errno; /* Probably not needed, but I'm paranoid */
79      free(*ctx);
80      *ctx = NULL;
81      errno = save_errno;
82      return 0;
83    }
84  }
85
86  if (readdir_r((*ctx)->dir, &(*ctx)->dirent, &dirent) != 0 ||
87      dirent == NULL) {
88    return 0;
89  }
90
91  return (*ctx)->dirent.d_name;
92}
93
94int OPENSSL_DIR_end(OPENSSL_DIR_CTX **ctx) {
95  if (ctx != NULL && *ctx != NULL) {
96    int r = closedir((*ctx)->dir);
97    free(*ctx);
98    *ctx = NULL;
99    return r == 0;
100  }
101
102  errno = EINVAL;
103  return 0;
104}
105
106#endif  /* !OPENSSL_WINDOWS */
107