1 /******************************************************************************
2 *
3 * Module Name: osunixdir - Unix directory access interfaces
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2016, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include "acpi.h"
45
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <dirent.h>
50 #include <fnmatch.h>
51 #include <sys/stat.h>
52
53 /*
54 * Allocated structure returned from OsOpenDirectory
55 */
56 typedef struct ExternalFindInfo
57 {
58 char *DirPathname;
59 DIR *DirPtr;
60 char temp_buffer[256];
61 char *WildcardSpec;
62 char RequestedFileType;
63
64 } EXTERNAL_FIND_INFO;
65
66
67 /*******************************************************************************
68 *
69 * FUNCTION: AcpiOsOpenDirectory
70 *
71 * PARAMETERS: DirPathname - Full pathname to the directory
72 * WildcardSpec - string of the form "*.c", etc.
73 *
74 * RETURN: A directory "handle" to be used in subsequent search operations.
75 * NULL returned on failure.
76 *
77 * DESCRIPTION: Open a directory in preparation for a wildcard search
78 *
79 ******************************************************************************/
80
81 void *
AcpiOsOpenDirectory(char * DirPathname,char * WildcardSpec,char RequestedFileType)82 AcpiOsOpenDirectory (
83 char *DirPathname,
84 char *WildcardSpec,
85 char RequestedFileType)
86 {
87 EXTERNAL_FIND_INFO *ExternalInfo;
88 DIR *dir;
89
90
91 /* Allocate the info struct that will be returned to the caller */
92
93 ExternalInfo = calloc (1, sizeof (EXTERNAL_FIND_INFO));
94 if (!ExternalInfo)
95 {
96 return (NULL);
97 }
98
99 /* Get the directory stream */
100
101 dir = opendir (DirPathname);
102 if (!dir)
103 {
104 fprintf (stderr, "Cannot open directory - %s\n", DirPathname);
105 free (ExternalInfo);
106 return (NULL);
107 }
108
109 /* Save the info in the return structure */
110
111 ExternalInfo->WildcardSpec = WildcardSpec;
112 ExternalInfo->RequestedFileType = RequestedFileType;
113 ExternalInfo->DirPathname = DirPathname;
114 ExternalInfo->DirPtr = dir;
115 return (ExternalInfo);
116 }
117
118
119 /*******************************************************************************
120 *
121 * FUNCTION: AcpiOsGetNextFilename
122 *
123 * PARAMETERS: DirHandle - Created via AcpiOsOpenDirectory
124 *
125 * RETURN: Next filename matched. NULL if no more matches.
126 *
127 * DESCRIPTION: Get the next file in the directory that matches the wildcard
128 * specification.
129 *
130 ******************************************************************************/
131
132 char *
AcpiOsGetNextFilename(void * DirHandle)133 AcpiOsGetNextFilename (
134 void *DirHandle)
135 {
136 EXTERNAL_FIND_INFO *ExternalInfo = DirHandle;
137 struct dirent *dir_entry;
138 char *temp_str;
139 int str_len;
140 struct stat temp_stat;
141 int err;
142
143
144 while ((dir_entry = readdir (ExternalInfo->DirPtr)))
145 {
146 if (!fnmatch (ExternalInfo->WildcardSpec, dir_entry->d_name, 0))
147 {
148 if (dir_entry->d_name[0] == '.')
149 {
150 continue;
151 }
152
153 str_len = strlen (dir_entry->d_name) +
154 strlen (ExternalInfo->DirPathname) + 2;
155
156 temp_str = calloc (str_len, 1);
157 if (!temp_str)
158 {
159 fprintf (stderr,
160 "Could not allocate buffer for temporary string\n");
161 return (NULL);
162 }
163
164 strcpy (temp_str, ExternalInfo->DirPathname);
165 strcat (temp_str, "/");
166 strcat (temp_str, dir_entry->d_name);
167
168 err = stat (temp_str, &temp_stat);
169 if (err == -1)
170 {
171 fprintf (stderr,
172 "Cannot stat file (should not happen) - %s\n",
173 temp_str);
174 free (temp_str);
175 return (NULL);
176 }
177
178 free (temp_str);
179
180 if ((S_ISDIR (temp_stat.st_mode)
181 && (ExternalInfo->RequestedFileType == REQUEST_DIR_ONLY))
182 ||
183 ((!S_ISDIR (temp_stat.st_mode)
184 && ExternalInfo->RequestedFileType == REQUEST_FILE_ONLY)))
185 {
186 /* copy to a temp buffer because dir_entry struct is on the stack */
187
188 strcpy (ExternalInfo->temp_buffer, dir_entry->d_name);
189 return (ExternalInfo->temp_buffer);
190 }
191 }
192 }
193
194 return (NULL);
195 }
196
197
198 /*******************************************************************************
199 *
200 * FUNCTION: AcpiOsCloseDirectory
201 *
202 * PARAMETERS: DirHandle - Created via AcpiOsOpenDirectory
203 *
204 * RETURN: None.
205 *
206 * DESCRIPTION: Close the open directory and cleanup.
207 *
208 ******************************************************************************/
209
210 void
AcpiOsCloseDirectory(void * DirHandle)211 AcpiOsCloseDirectory (
212 void *DirHandle)
213 {
214 EXTERNAL_FIND_INFO *ExternalInfo = DirHandle;
215
216
217 /* Close the directory and free allocations */
218
219 closedir (ExternalInfo->DirPtr);
220 free (DirHandle);
221 }
222