2 * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/types.h>
39 * The POSIXly macro for the maximum number of characters in a file path is
40 * NAME_MAX. However, some operating systems use PATH_MAX instead.
41 * Therefore, it seems natural to first check for PATH_MAX and use that, and
42 * if it doesn't exist, use NAME_MAX.
45 # define LP_ENTRY_SIZE PATH_MAX
46 #elif defined(NAME_MAX)
47 # define LP_ENTRY_SIZE NAME_MAX
51 * Of course, there's the possibility that neither PATH_MAX nor NAME_MAX
52 * exist. It's also possible that NAME_MAX exists but is define to a very
53 * small value (HP-UX offers 14), so we need to check if we got a result, and
54 * if it meets a minimum standard, and create or change it if not.
56 #if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255
58 # define LP_ENTRY_SIZE 255
61 struct LP_dir_context_st {
63 char entry_name[LP_ENTRY_SIZE + 1];
66 const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
68 struct dirent *direntry = NULL;
70 if (ctx == NULL || directory == NULL) {
77 *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
82 memset(*ctx, '\0', sizeof(LP_DIR_CTX));
84 (*ctx)->dir = opendir(directory);
85 if ((*ctx)->dir == NULL) {
86 int save_errno = errno; /* Probably not needed, but I'm paranoid */
94 direntry = readdir((*ctx)->dir);
95 if (direntry == NULL) {
99 strncpy((*ctx)->entry_name, direntry->d_name,
100 sizeof((*ctx)->entry_name) - 1);
101 (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0';
102 return (*ctx)->entry_name;
105 int LP_find_file_end(LP_DIR_CTX **ctx)
107 if (ctx != NULL && *ctx != NULL) {
108 int ret = closedir((*ctx)->dir);