1 /* $NetBSD: dir.c,v 1.1.1.3 2014/12/10 03:34:31 christos Exp $ */
2
3 /*
4 * Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
11 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
12 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
13 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
14 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
15 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
16 * PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20 #include <sys/stat.h>
21
22 #include <ctype.h>
23 #include <errno.h>
24 #include <unistd.h>
25 #include <string.h>
26
27 #include "dlz_minimal.h"
28 #include "dir.h"
29
30 void
dir_init(dir_t * dir)31 dir_init(dir_t *dir) {
32 dir->entry.name[0] = '\0';
33 dir->entry.length = 0;
34
35 dir->handle = NULL;
36 }
37
38 isc_result_t
dir_open(dir_t * dir,const char * dirname)39 dir_open(dir_t *dir, const char *dirname) {
40 char *p;
41 isc_result_t result = ISC_R_SUCCESS;
42
43 if (strlen(dirname) + 3 > sizeof(dir->dirname))
44 return (ISC_R_NOSPACE);
45 strcpy(dir->dirname, dirname);
46
47 p = dir->dirname + strlen(dir->dirname);
48 if (dir->dirname < p && *(p - 1) != '/')
49 *p++ = '/';
50 *p++ = '*';
51 *p = '\0';
52
53 dir->handle = opendir(dirname);
54 if (dir->handle == NULL) {
55 switch (errno) {
56 case ENOTDIR:
57 case ELOOP:
58 case EINVAL:
59 case ENAMETOOLONG:
60 case EBADF:
61 result = ISC_R_INVALIDFILE;
62 case ENOENT:
63 result = ISC_R_FILENOTFOUND;
64 case EACCES:
65 case EPERM:
66 result = ISC_R_NOPERM;
67 case ENOMEM:
68 result = ISC_R_NOMEMORY;
69 default:
70 result = ISC_R_UNEXPECTED;
71 }
72 }
73
74 return (result);
75 }
76
77 /*!
78 * \brief Return previously retrieved file or get next one.
79
80 * Unix's dirent has
81 * separate open and read functions, but the Win32 and DOS interfaces open
82 * the dir stream and reads the first file in one operation.
83 */
84 isc_result_t
dir_read(dir_t * dir)85 dir_read(dir_t *dir) {
86 struct dirent *entry;
87
88 entry = readdir(dir->handle);
89 if (entry == NULL)
90 return (ISC_R_NOMORE);
91
92 if (sizeof(dir->entry.name) <= strlen(entry->d_name))
93 return (ISC_R_UNEXPECTED);
94
95 strcpy(dir->entry.name, entry->d_name);
96
97 dir->entry.length = strlen(entry->d_name);
98 return (ISC_R_SUCCESS);
99 }
100
101 /*!
102 * \brief Close directory stream.
103 */
104 void
dir_close(dir_t * dir)105 dir_close(dir_t *dir) {
106 (void)closedir(dir->handle);
107 dir->handle = NULL;
108 }
109
110 /*!
111 * \brief Reposition directory stream at start.
112 */
113 isc_result_t
dir_reset(dir_t * dir)114 dir_reset(dir_t *dir) {
115 rewinddir(dir->handle);
116
117 return (ISC_R_SUCCESS);
118 }
119