1/******************************************************************************
2 *
3 * Module Name: osunixdir - Unix directory access interfaces
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2015, 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/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 <ctype.h>
52#include <sys/stat.h>
53
54/*
55 * Allocated structure returned from os_open_directory
56 */
57typedef struct external_find_info {
58	char *dir_pathname;
59	DIR *dir_ptr;
60	char temp_buffer[256];
61	char *wildcard_spec;
62	char requested_file_type;
63
64} external_find_info;
65
66/*******************************************************************************
67 *
68 * FUNCTION:    acpi_os_open_directory
69 *
70 * PARAMETERS:  dir_pathname        - Full pathname to the directory
71 *              wildcard_spec       - string of the form "*.c", etc.
72 *
73 * RETURN:      A directory "handle" to be used in subsequent search operations.
74 *              NULL returned on failure.
75 *
76 * DESCRIPTION: Open a directory in preparation for a wildcard search
77 *
78 ******************************************************************************/
79
80void *acpi_os_open_directory(char *dir_pathname,
81			     char *wildcard_spec, char requested_file_type)
82{
83	struct external_find_info *external_info;
84	DIR *dir;
85
86	/* Allocate the info struct that will be returned to the caller */
87
88	external_info = calloc(1, sizeof(struct external_find_info));
89	if (!external_info) {
90		return (NULL);
91	}
92
93	/* Get the directory stream */
94
95	dir = opendir(dir_pathname);
96	if (!dir) {
97		fprintf(stderr, "Cannot open directory - %s\n", dir_pathname);
98		free(external_info);
99		return (NULL);
100	}
101
102	/* Save the info in the return structure */
103
104	external_info->wildcard_spec = wildcard_spec;
105	external_info->requested_file_type = requested_file_type;
106	external_info->dir_pathname = dir_pathname;
107	external_info->dir_ptr = dir;
108	return (external_info);
109}
110
111/*******************************************************************************
112 *
113 * FUNCTION:    acpi_os_get_next_filename
114 *
115 * PARAMETERS:  dir_handle          - Created via acpi_os_open_directory
116 *
117 * RETURN:      Next filename matched. NULL if no more matches.
118 *
119 * DESCRIPTION: Get the next file in the directory that matches the wildcard
120 *              specification.
121 *
122 ******************************************************************************/
123
124char *acpi_os_get_next_filename(void *dir_handle)
125{
126	struct external_find_info *external_info = dir_handle;
127	struct dirent *dir_entry;
128	char *temp_str;
129	int str_len;
130	struct stat temp_stat;
131	int err;
132
133	while ((dir_entry = readdir(external_info->dir_ptr))) {
134		if (!fnmatch
135		    (external_info->wildcard_spec, dir_entry->d_name, 0)) {
136			if (dir_entry->d_name[0] == '.') {
137				continue;
138			}
139
140			str_len = strlen(dir_entry->d_name) +
141			    strlen(external_info->dir_pathname) + 2;
142
143			temp_str = calloc(str_len, 1);
144			if (!temp_str) {
145				fprintf(stderr,
146					"Could not allocate buffer for temporary string\n");
147				return (NULL);
148			}
149
150			strcpy(temp_str, external_info->dir_pathname);
151			strcat(temp_str, "/");
152			strcat(temp_str, dir_entry->d_name);
153
154			err = stat(temp_str, &temp_stat);
155			if (err == -1) {
156				fprintf(stderr,
157					"Cannot stat file (should not happen) - %s\n",
158					temp_str);
159				free(temp_str);
160				return (NULL);
161			}
162
163			free(temp_str);
164
165			if ((S_ISDIR(temp_stat.st_mode)
166			     && (external_info->requested_file_type ==
167				 REQUEST_DIR_ONLY))
168			    || ((!S_ISDIR(temp_stat.st_mode)
169				 && external_info->requested_file_type ==
170				 REQUEST_FILE_ONLY))) {
171
172				/* copy to a temp buffer because dir_entry struct is on the stack */
173
174				strcpy(external_info->temp_buffer,
175				       dir_entry->d_name);
176				return (external_info->temp_buffer);
177			}
178		}
179	}
180
181	return (NULL);
182}
183
184/*******************************************************************************
185 *
186 * FUNCTION:    acpi_os_close_directory
187 *
188 * PARAMETERS:  dir_handle          - Created via acpi_os_open_directory
189 *
190 * RETURN:      None.
191 *
192 * DESCRIPTION: Close the open directory and cleanup.
193 *
194 ******************************************************************************/
195
196void acpi_os_close_directory(void *dir_handle)
197{
198	struct external_find_info *external_info = dir_handle;
199
200	/* Close the directory and free allocations */
201
202	closedir(external_info->dir_ptr);
203	free(dir_handle);
204}
205