1 /******************************************************************************
2 *
3 * Module Name: apfiles - File-related functions for acpidump utility
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2017, 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 "acpidump.h"
45
46 /* Local prototypes */
47
48 static int ap_is_existing_file(char *pathname);
49
50 /******************************************************************************
51 *
52 * FUNCTION: ap_is_existing_file
53 *
54 * PARAMETERS: pathname - Output filename
55 *
56 * RETURN: 0 on success
57 *
58 * DESCRIPTION: Query for file overwrite if it already exists.
59 *
60 ******************************************************************************/
61
62 static int ap_is_existing_file(char *pathname)
63 {
64 #ifndef _GNU_EFI
65 struct stat stat_info;
66
67 if (!stat(pathname, &stat_info)) {
68 fprintf(stderr,
69 "Target path already exists, overwrite? [y|n] ");
70
71 if (getchar() != 'y') {
72 return (-1);
73 }
74 }
75 #endif
76
77 return 0;
78 }
79
80 /******************************************************************************
81 *
82 * FUNCTION: ap_open_output_file
83 *
84 * PARAMETERS: pathname - Output filename
85 *
86 * RETURN: Open file handle
87 *
88 * DESCRIPTION: Open a text output file for acpidump. Checks if file already
89 * exists.
90 *
91 ******************************************************************************/
92
93 int ap_open_output_file(char *pathname)
94 {
95 ACPI_FILE file;
96
97 /* If file exists, prompt for overwrite */
98
99 if (ap_is_existing_file(pathname) != 0) {
100 return (-1);
101 }
102
103 /* Point stdout to the file */
104
105 file = fopen(pathname, "w");
106 if (!file) {
107 fprintf(stderr, "Could not open output file: %s\n", pathname);
108 return (-1);
109 }
110
111 /* Save the file and path */
112
113 gbl_output_file = file;
114 gbl_output_filename = pathname;
115 return (0);
116 }
117
118 /******************************************************************************
119 *
120 * FUNCTION: ap_write_to_binary_file
121 *
122 * PARAMETERS: table - ACPI table to be written
123 * instance - ACPI table instance no. to be written
124 *
125 * RETURN: Status
126 *
127 * DESCRIPTION: Write an ACPI table to a binary file. Builds the output
128 * filename from the table signature.
129 *
130 ******************************************************************************/
131
132 int ap_write_to_binary_file(struct acpi_table_header *table, u32 instance)
133 {
134 char filename[ACPI_NAME_SIZE + 16];
135 char instance_str[16];
136 ACPI_FILE file;
137 acpi_size actual;
138 u32 table_length;
139
140 /* Obtain table length */
141
142 table_length = ap_get_table_length(table);
143
144 /* Construct lower-case filename from the table local signature */
145
146 if (ACPI_VALIDATE_RSDP_SIG(table->signature)) {
147 ACPI_MOVE_NAME(filename, ACPI_RSDP_NAME);
148 } else {
149 ACPI_MOVE_NAME(filename, table->signature);
150 }
151
152 filename[0] = (char)tolower((int)filename[0]);
153 filename[1] = (char)tolower((int)filename[1]);
154 filename[2] = (char)tolower((int)filename[2]);
155 filename[3] = (char)tolower((int)filename[3]);
156 filename[ACPI_NAME_SIZE] = 0;
157
158 /* Handle multiple SSDts - create different filenames for each */
159
160 if (instance > 0) {
161 snprintf(instance_str, sizeof(instance_str), "%u", instance);
162 strcat(filename, instance_str);
163 }
164
165 strcat(filename, FILE_SUFFIX_BINARY_TABLE);
166
167 if (gbl_verbose_mode) {
168 fprintf(stderr,
169 "Writing [%4.4s] to binary file: %s 0x%X (%u) bytes\n",
170 table->signature, filename, table->length,
171 table->length);
172 }
173
174 /* Open the file and dump the entire table in binary mode */
175
176 file = fopen(filename, "wb");
177 if (!file) {
178 fprintf(stderr, "Could not open output file: %s\n", filename);
179 return (-1);
180 }
181
182 actual = fwrite(table, 1, table_length, file);
183 if (actual != table_length) {
184 fprintf(stderr, "Error writing binary output file: %s\n",
185 filename);
186 fclose(file);
187 return (-1);
188 }
189
190 fclose(file);
191 return (0);
192 }
193
194 /******************************************************************************
195 *
196 * FUNCTION: ap_get_table_from_file
197 *
198 * PARAMETERS: pathname - File containing the binary ACPI table
199 * out_file_size - Where the file size is returned
200 *
201 * RETURN: Buffer containing the ACPI table. NULL on error.
202 *
203 * DESCRIPTION: Open a file and read it entirely into a new buffer
204 *
205 ******************************************************************************/
206
207 struct acpi_table_header *ap_get_table_from_file(char *pathname,
208 u32 *out_file_size)
209 {
210 struct acpi_table_header *buffer = NULL;
211 ACPI_FILE file;
212 u32 file_size;
213 acpi_size actual;
214
215 /* Must use binary mode */
216
217 file = fopen(pathname, "rb");
218 if (!file) {
219 fprintf(stderr, "Could not open input file: %s\n", pathname);
220 return (NULL);
221 }
222
223 /* Need file size to allocate a buffer */
224
225 file_size = cm_get_file_size(file);
226 if (file_size == ACPI_UINT32_MAX) {
227 fprintf(stderr,
228 "Could not get input file size: %s\n", pathname);
229 goto cleanup;
230 }
231
232 /* Allocate a buffer for the entire file */
233
234 buffer = ACPI_ALLOCATE_ZEROED(file_size);
235 if (!buffer) {
236 fprintf(stderr,
237 "Could not allocate file buffer of size: %u\n",
238 file_size);
239 goto cleanup;
240 }
241
242 /* Read the entire file */
243
244 actual = fread(buffer, 1, file_size, file);
245 if (actual != file_size) {
246 fprintf(stderr, "Could not read input file: %s\n", pathname);
247 ACPI_FREE(buffer);
248 buffer = NULL;
249 goto cleanup;
250 }
251
252 *out_file_size = file_size;
253
254 cleanup:
255 fclose(file);
256 return (buffer);
257 }
258
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