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506f57dd LZ |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: apfiles - File-related functions for acpidump utility | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
7735ca0e | 8 | * Copyright (C) 2000 - 2017, Intel Corp. |
506f57dd LZ |
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" | |
506f57dd | 45 | |
4d2c8223 LZ |
46 | /* Local prototypes */ |
47 | ||
48 | static int ap_is_existing_file(char *pathname); | |
49 | ||
1fad8738 BM |
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 | ||
4d2c8223 LZ |
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)) { | |
dd99cbcc LZ |
68 | fprintf(stderr, |
69 | "Target path already exists, overwrite? [y|n] "); | |
4d2c8223 LZ |
70 | |
71 | if (getchar() != 'y') { | |
72 | return (-1); | |
73 | } | |
74 | } | |
75 | #endif | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
506f57dd LZ |
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 | { | |
846d6ef4 | 95 | ACPI_FILE file; |
506f57dd LZ |
96 | |
97 | /* If file exists, prompt for overwrite */ | |
98 | ||
4d2c8223 LZ |
99 | if (ap_is_existing_file(pathname) != 0) { |
100 | return (-1); | |
506f57dd LZ |
101 | } |
102 | ||
103 | /* Point stdout to the file */ | |
104 | ||
dd99cbcc | 105 | file = fopen(pathname, "w"); |
506f57dd | 106 | if (!file) { |
dd99cbcc | 107 | fprintf(stderr, "Could not open output file: %s\n", pathname); |
506f57dd LZ |
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]; | |
dcaff16d | 136 | ACPI_FILE file; |
b597664f | 137 | acpi_size actual; |
506f57dd LZ |
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 | } | |
1fad8738 | 151 | |
4fa4616e BM |
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]); | |
506f57dd LZ |
156 | filename[ACPI_NAME_SIZE] = 0; |
157 | ||
158 | /* Handle multiple SSDts - create different filenames for each */ | |
159 | ||
160 | if (instance > 0) { | |
f173a775 | 161 | snprintf(instance_str, sizeof(instance_str), "%u", instance); |
4fa4616e | 162 | strcat(filename, instance_str); |
506f57dd LZ |
163 | } |
164 | ||
842e7133 | 165 | strcat(filename, FILE_SUFFIX_BINARY_TABLE); |
506f57dd LZ |
166 | |
167 | if (gbl_verbose_mode) { | |
dd99cbcc LZ |
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); | |
506f57dd LZ |
172 | } |
173 | ||
174 | /* Open the file and dump the entire table in binary mode */ | |
175 | ||
dd99cbcc | 176 | file = fopen(filename, "wb"); |
506f57dd | 177 | if (!file) { |
dd99cbcc | 178 | fprintf(stderr, "Could not open output file: %s\n", filename); |
506f57dd LZ |
179 | return (-1); |
180 | } | |
181 | ||
dd99cbcc | 182 | actual = fwrite(table, 1, table_length, file); |
506f57dd | 183 | if (actual != table_length) { |
dd99cbcc LZ |
184 | fprintf(stderr, "Error writing binary output file: %s\n", |
185 | filename); | |
186 | fclose(file); | |
506f57dd LZ |
187 | return (-1); |
188 | } | |
189 | ||
dd99cbcc | 190 | fclose(file); |
506f57dd LZ |
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; | |
dcaff16d | 211 | ACPI_FILE file; |
506f57dd | 212 | u32 file_size; |
b597664f | 213 | acpi_size actual; |
506f57dd LZ |
214 | |
215 | /* Must use binary mode */ | |
216 | ||
dd99cbcc | 217 | file = fopen(pathname, "rb"); |
506f57dd | 218 | if (!file) { |
dd99cbcc | 219 | fprintf(stderr, "Could not open input file: %s\n", pathname); |
506f57dd LZ |
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) { | |
dd99cbcc LZ |
227 | fprintf(stderr, |
228 | "Could not get input file size: %s\n", pathname); | |
506f57dd LZ |
229 | goto cleanup; |
230 | } | |
231 | ||
232 | /* Allocate a buffer for the entire file */ | |
233 | ||
fbee6b21 | 234 | buffer = ACPI_ALLOCATE_ZEROED(file_size); |
506f57dd | 235 | if (!buffer) { |
dd99cbcc LZ |
236 | fprintf(stderr, |
237 | "Could not allocate file buffer of size: %u\n", | |
238 | file_size); | |
506f57dd LZ |
239 | goto cleanup; |
240 | } | |
241 | ||
242 | /* Read the entire file */ | |
243 | ||
dd99cbcc | 244 | actual = fread(buffer, 1, file_size, file); |
506f57dd | 245 | if (actual != file_size) { |
dd99cbcc | 246 | fprintf(stderr, "Could not read input file: %s\n", pathname); |
fbee6b21 | 247 | ACPI_FREE(buffer); |
506f57dd LZ |
248 | buffer = NULL; |
249 | goto cleanup; | |
250 | } | |
251 | ||
252 | *out_file_size = file_size; | |
253 | ||
254 | cleanup: | |
dd99cbcc | 255 | fclose(file); |
506f57dd LZ |
256 | return (buffer); |
257 | } |