2 * Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * This file is dual-licensed and is also available under the following
14 * Copyright (c) 2004, 2018, Richard Levitte <richard@levitte.org>
15 * All rights reserved.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 #include <sys/types.h>
54 * The POSIX macro for the maximum number of characters in a file path is
55 * NAME_MAX. However, some operating systems use PATH_MAX instead.
56 * Therefore, it seems natural to first check for PATH_MAX and use that, and
57 * if it doesn't exist, use NAME_MAX.
60 # define LP_ENTRY_SIZE PATH_MAX
61 #elif defined(NAME_MAX)
62 # define LP_ENTRY_SIZE NAME_MAX
66 * Of course, there's the possibility that neither PATH_MAX nor NAME_MAX
67 * exist. It's also possible that NAME_MAX exists but is define to a very
68 * small value (HP-UX offers 14), so we need to check if we got a result, and
69 * if it meets a minimum standard, and create or change it if not.
71 #if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255
73 # define LP_ENTRY_SIZE 255
76 struct LP_dir_context_st {
78 char entry_name[LP_ENTRY_SIZE + 1];
80 int expect_file_generations;
81 char previous_entry_name[LP_ENTRY_SIZE + 1];
85 const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
87 struct dirent *direntry = NULL;
89 if (ctx == NULL || directory == NULL) {
96 *ctx = malloc(sizeof(**ctx));
101 memset(*ctx, 0, sizeof(**ctx));
105 char c = directory[strlen(directory) - 1];
107 if (c == ']' || c == '>' || c == ':')
108 (*ctx)->expect_file_generations = 1;
112 (*ctx)->dir = opendir(directory);
113 if ((*ctx)->dir == NULL) {
114 int save_errno = errno; /* Probably not needed, but I'm paranoid */
123 strncpy((*ctx)->previous_entry_name, (*ctx)->entry_name,
124 sizeof((*ctx)->previous_entry_name));
129 direntry = readdir((*ctx)->dir);
130 if (direntry == NULL) {
134 strncpy((*ctx)->entry_name, direntry->d_name,
135 sizeof((*ctx)->entry_name) - 1);
136 (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0';
138 if ((*ctx)->expect_file_generations) {
139 char *p = (*ctx)->entry_name + strlen((*ctx)->entry_name);
141 while(p > (*ctx)->entry_name && isdigit(p[-1]))
143 if (p > (*ctx)->entry_name && p[-1] == ';')
145 if (strcasecmp((*ctx)->entry_name, (*ctx)->previous_entry_name) == 0)
149 return (*ctx)->entry_name;
152 int LP_find_file_end(LP_DIR_CTX **ctx)
154 if (ctx != NULL && *ctx != NULL) {
155 int ret = closedir((*ctx)->dir);