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 201409 /* 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 #include <stdlib.h>
39 #include <string.h>
40
41 #if defined(OPENSSL_PNACL)
42 /* pnacl doesn't include readdir_r! So we do the best we can. */
readdir_r(DIR * dirp,struct dirent * entry,struct dirent ** result)43 int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result) {
44 errno = 0;
45 *result = readdir(dirp);
46 if (*result != NULL) {
47 return 0;
48 }
49 if (errno) {
50 return 1;
51 }
52 return 0;
53 }
54 #endif
55
56 struct OPENSSL_dir_context_st {
57 DIR *dir;
58 struct dirent dirent;
59 };
60
OPENSSL_DIR_read(OPENSSL_DIR_CTX ** ctx,const char * directory)61 const char *OPENSSL_DIR_read(OPENSSL_DIR_CTX **ctx, const char *directory) {
62 struct dirent *dirent;
63
64 if (ctx == NULL || directory == NULL) {
65 errno = EINVAL;
66 return NULL;
67 }
68
69 errno = 0;
70 if (*ctx == NULL) {
71 *ctx = malloc(sizeof(OPENSSL_DIR_CTX));
72 if (*ctx == NULL) {
73 errno = ENOMEM;
74 return 0;
75 }
76 memset(*ctx, 0, sizeof(OPENSSL_DIR_CTX));
77
78 (*ctx)->dir = opendir(directory);
79 if ((*ctx)->dir == NULL) {
80 int save_errno = errno; /* Probably not needed, but I'm paranoid */
81 free(*ctx);
82 *ctx = NULL;
83 errno = save_errno;
84 return 0;
85 }
86 }
87
88 if (readdir_r((*ctx)->dir, &(*ctx)->dirent, &dirent) != 0 ||
89 dirent == NULL) {
90 return 0;
91 }
92
93 return (*ctx)->dirent.d_name;
94 }
95
OPENSSL_DIR_end(OPENSSL_DIR_CTX ** ctx)96 int OPENSSL_DIR_end(OPENSSL_DIR_CTX **ctx) {
97 if (ctx != NULL && *ctx != NULL) {
98 int r = closedir((*ctx)->dir);
99 free(*ctx);
100 *ctx = NULL;
101 return r == 0;
102 }
103
104 errno = EINVAL;
105 return 0;
106 }
107
108 #endif /* !OPENSSL_WINDOWS */
109