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1 | /* $LP: LPlib/source/LPdir_unix.c,v 1.6 2004/06/14 10:08:43 _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 REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
25 | * SUCH DAMAGE. | |
26 | */ | |
27 | ||
28 | #include <stddef.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <sys/types.h> | |
32 | #include <dirent.h> | |
33 | #include <errno.h> | |
34 | #ifndef LPDIR_H | |
35 | #include "LPdir.h" | |
36 | #endif | |
37 | ||
38 | struct LP_dir_context_st | |
39 | { | |
40 | DIR *dir; | |
41 | char entry_name[NAME_MAX+1]; | |
42 | }; | |
43 | ||
44 | const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory) | |
45 | { | |
46 | struct dirent *direntry = NULL; | |
47 | ||
48 | if (ctx == NULL || directory == NULL) | |
49 | { | |
50 | errno = EINVAL; | |
51 | return 0; | |
52 | } | |
53 | ||
54 | errno = 0; | |
55 | if (*ctx == NULL) | |
56 | { | |
57 | *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX)); | |
58 | if (*ctx == NULL) | |
59 | { | |
60 | errno = ENOMEM; | |
61 | return 0; | |
62 | } | |
63 | memset(*ctx, '\0', sizeof(LP_DIR_CTX)); | |
64 | ||
65 | (*ctx)->dir = opendir(directory); | |
66 | if ((*ctx)->dir == NULL) | |
67 | { | |
68 | int save_errno = errno; /* Probably not needed, but I'm paranoid */ | |
69 | free(*ctx); | |
70 | *ctx = NULL; | |
71 | errno = save_errno; | |
72 | return 0; | |
73 | } | |
74 | } | |
75 | ||
76 | direntry = readdir((*ctx)->dir); | |
77 | if (direntry == NULL) | |
78 | { | |
79 | return 0; | |
80 | } | |
81 | ||
82 | strncpy((*ctx)->entry_name, direntry->d_name, sizeof((*ctx)->entry_name)); | |
83 | return (*ctx)->entry_name; | |
84 | } | |
85 | ||
86 | int LP_find_file_end(LP_DIR_CTX **ctx) | |
87 | { | |
88 | if (ctx != NULL && *ctx != NULL) | |
89 | { | |
90 | int ret = closedir((*ctx)->dir); | |
91 | ||
92 | free(*ctx); | |
93 | switch (ret) | |
94 | { | |
95 | case 0: | |
96 | return 1; | |
97 | case -1: | |
98 | return 0; | |
99 | default: | |
100 | break; | |
101 | } | |
102 | } | |
103 | errno = EINVAL; | |
104 | return 0; | |
105 | } |