4 * Copyright (C) 2010 Carl Thijssen
5 * Copyright (C) 2012 Eric Biggers
7 * wimlib - Library for working with WIM files
9 * This library is free software; you can redistribute it and/or modify it under
10 * the terms of the GNU Lesser General Public License as published by the Free
11 * Software Foundation; either version 2.1 of the License, or (at your option) any
14 * This library is distributed in the hope that it will be useful, but WITHOUT ANY
15 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
16 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public License along
19 * with this library; if not, write to the Free Software Foundation, Inc., 59
20 * Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "wimlib_internal.h"
24 #include "endianness.h"
36 /* True if WIMLIB is to print an informational message when an error occurs.
37 * This can be turned off by calling wimlib_set_error_messages(false). */
38 #ifdef ENABLE_ERROR_MESSAGES
40 bool __wimlib_print_errors = false;
42 void wimlib_error(const char *format, ...)
44 if (__wimlib_print_errors) {
50 fputs("ERROR: ", stderr);
51 vfprintf(stderr, format, va);
57 void wimlib_warning(const char *format, ...)
59 if (__wimlib_print_errors) {
65 fputs("WARNING: ", stderr);
66 vfprintf(stderr, format, va);
74 WIMLIBAPI int wimlib_set_print_errors(bool show_error_messages)
76 #ifdef ENABLE_ERROR_MESSAGES
77 __wimlib_print_errors = show_error_messages;
80 if (show_error_messages)
81 return WIMLIB_ERR_UNSUPPORTED;
85 static const char *error_strings[] = {
88 [WIMLIB_ERR_COMPRESSED_LOOKUP_TABLE]
89 = "Lookup table is compressed",
90 [WIMLIB_ERR_DECOMPRESSION]
91 = "Failed to decompress compressed data",
92 [WIMLIB_ERR_DELETE_STAGING_DIR]
93 = "Failed to delete staging directory",
95 = "Failed to fork another process",
97 = "An error was returned by fuse_main()",
98 [WIMLIB_ERR_FUSERMOUNT]
99 = "Could not execute the `fusermount' program, or it exited "
100 "with a failure status",
101 [WIMLIB_ERR_IMAGE_COUNT]
102 = "Inconsistent image count among the metadata "
103 "resources, the WIM header, and/or the XML data",
104 [WIMLIB_ERR_IMAGE_NAME_COLLISION]
105 = "Tried to add an image with a name that is already in use",
106 [WIMLIB_ERR_INTEGRITY]
107 = "The WIM failed an integrity check",
108 [WIMLIB_ERR_INVALID_CHUNK_SIZE]
109 = "The WIM is compressed but does not have a chunk "
111 [WIMLIB_ERR_INVALID_COMPRESSION_TYPE]
112 = "The WIM is compressed, but is not marked as having LZX or "
113 "XPRESS compression",
114 [WIMLIB_ERR_INVALID_DENTRY]
115 = "A directory entry in the WIM was invalid",
116 [WIMLIB_ERR_INVALID_HEADER_SIZE]
117 = "The WIM header was not 208 bytes",
118 [WIMLIB_ERR_INVALID_IMAGE]
119 = "Tried to select an image that does not exist in the WIM",
120 [WIMLIB_ERR_INVALID_INTEGRITY_TABLE]
121 = "The WIM's integrity table is invalid",
122 [WIMLIB_ERR_INVALID_PARAM]
123 = "An invalid parameter was given",
124 [WIMLIB_ERR_INVALID_RESOURCE_SIZE]
125 = "A resource entry in the WIM is invalid",
127 = "Failed to create a hard or symbolic link when extracting "
128 "a file from the WIM",
130 = "Failed to create a directory",
132 = "Failed to create or use a POSIX message queue",
134 = "Ran out of memory",
136 = "Expected a directory",
137 [WIMLIB_ERR_NOT_A_WIM_FILE]
138 = "The file did not begin with the magic characters that "
139 "identify a WIM file",
140 [WIMLIB_ERR_NO_FILENAME]
141 = "The WIM is not identified with a filename",
143 = "Failed to open a file",
145 = "Failed to open a directory",
147 = "Could not read data from a file",
149 = "Could not rename a file",
151 = "The WIM is part of a split WIM, which Wimlib does not support",
153 = "Could not read the metadata for a file or directory",
156 [WIMLIB_ERR_UNKNOWN_VERSION]
157 = "The WIM file is marked with an unknown version number",
158 [WIMLIB_ERR_UNSUPPORTED]
159 = "The requested operation is unsupported",
161 = "Failed to write data to a file",
163 = "The XML data of the WIM is invalid",
166 WIMLIBAPI const char *wimlib_get_error_string(enum wimlib_error_code code)
168 if (code < WIMLIB_ERR_SUCCESS || code > WIMLIB_ERR_XML)
171 return error_strings[code];
176 #ifdef ENABLE_CUSTOM_MEMORY_ALLOCATOR
177 void *(*wimlib_malloc_func)(size_t) = malloc;
178 void (*wimlib_free_func)(void *) = free;
179 void *(*wimlib_realloc_func)(void *, size_t) = realloc;
181 void *wimlib_calloc(size_t nmemb, size_t size)
183 size_t total_size = nmemb * size;
184 void *p = MALLOC(total_size);
186 memset(p, 0, total_size);
190 char *wimlib_strdup(const char *str)
196 p = MALLOC(size + 1);
198 memcpy(p, str, size + 1);
202 extern void xml_set_memory_allocator(void *(*malloc_func)(size_t),
203 void (*free_func)(void *),
204 void *(*realloc_func)(void *, size_t));
207 WIMLIBAPI int wimlib_set_memory_allocator(void *(*malloc_func)(size_t),
208 void (*free_func)(void *),
209 void *(*realloc_func)(void *, size_t))
211 #ifdef ENABLE_CUSTOM_MEMORY_ALLOCATOR
212 wimlib_malloc_func = malloc_func ? malloc_func : malloc;
213 wimlib_free_func = free_func ? free_func : free;
214 wimlib_realloc_func = realloc_func ? realloc_func : realloc;
216 xml_set_memory_allocator(wimlib_malloc_func, wimlib_free_func,
217 wimlib_realloc_func);
219 ERROR("Cannot set custom memory allocator functions:\n");
220 ERROR("wimlib was compiled with the "
221 "--without-custom-memory-allocator flag\n");
222 return WIMLIB_ERR_UNSUPPORTED;
228 static iconv_t cd_utf16_to_utf8 = (iconv_t)(-1);
230 /* Converts a string in the UTF-16 encoding to a newly allocated string in the
232 char *utf16_to_utf8(const char *utf16_str, size_t utf16_len,
233 size_t *utf8_len_ret)
235 if (cd_utf16_to_utf8 == (iconv_t)(-1)) {
236 cd_utf16_to_utf8 = iconv_open("UTF-8", "UTF-16LE");
237 if (cd_utf16_to_utf8 == (iconv_t)-1) {
238 ERROR("Failed to get conversion descriptor for "
239 "converting UTF-16LE to UTF-8: %m\n");
243 size_t utf16_bytes_left = utf16_len;
244 size_t utf8_bytes_left = utf16_len;
246 char *utf8_str = MALLOC(utf8_bytes_left);
250 char *orig_utf8_str = utf8_str;
252 size_t num_chars_converted = iconv(cd_utf16_to_utf8, (char**)&utf16_str,
253 &utf16_bytes_left, &utf8_str, &utf8_bytes_left);
255 if (num_chars_converted == (size_t)(-1)) {
256 ERROR("Failed to convert UTF-16LE string to UTF-8 string: "
262 size_t utf8_len = utf16_len - utf8_bytes_left;
264 *utf8_len_ret = utf8_len;
265 orig_utf8_str[utf8_len] = '\0';
266 return orig_utf8_str;
269 static iconv_t cd_utf8_to_utf16 = (iconv_t)(-1);
271 /* Converts a string in the UTF-8 encoding to a newly allocated string in the
272 * UTF-16 encoding. */
273 char *utf8_to_utf16(const char *utf8_str, size_t utf8_len,
274 size_t *utf16_len_ret)
276 if (cd_utf8_to_utf16 == (iconv_t)(-1)) {
277 cd_utf8_to_utf16 = iconv_open("UTF-16LE", "UTF-8");
278 if (cd_utf8_to_utf16 == (iconv_t)-1) {
279 ERROR("Failed to get conversion descriptor for "
280 "converting UTF-8 to UTF-16LE: %m\n");
285 size_t utf8_bytes_left = utf8_len;
286 size_t utf16_capacity = utf8_len * 4;
287 size_t utf16_bytes_left = utf16_capacity;
289 char *utf16_str = MALLOC(utf16_capacity + 2);
293 char *orig_utf16_str = utf16_str;
295 size_t num_chars_converted = iconv(cd_utf8_to_utf16, (char**)&utf8_str,
296 &utf8_bytes_left, &utf16_str, &utf16_bytes_left);
298 if (num_chars_converted == (size_t)(-1)) {
299 ERROR("Failed to convert UTF-8 string to UTF-16LE string: "
302 "Not enough room in output buffer" :
304 FREE(orig_utf16_str);
308 size_t utf16_len = utf16_capacity - utf16_bytes_left;
310 *utf16_len_ret = utf16_len;
311 orig_utf16_str[utf16_len] = '\0';
312 orig_utf16_str[utf16_len + 1] = '\0';
313 return orig_utf16_str;
316 /* Write @n bytes from @buf to the file descriptor @fd, retrying on interupt and
319 * Returns short count and set errno on failure. */
320 ssize_t full_write(int fd, const void *buf, size_t n)
327 ret = write(fd, p, n);
341 static bool seeded = false;
343 /* Fills @n bytes pointed to by @p with random alphanumeric characters. */
344 void randomize_char_array_with_alnum(char p[], size_t n)
363 /* Fills @n bytes pointer to by @p with random numbers. */
364 void randomize_byte_array(void *__p, size_t n)
376 /* Takes in a path of length @len in @buf, and transforms it into a string for
377 * the path of its parent directory. */
378 void to_parent_name(char buf[], size_t len)
380 ssize_t i = (ssize_t)len - 1;
381 while (i >= 0 && buf[i] == '/')
383 while (i >= 0 && buf[i] != '/')
385 while (i >= 0 && buf[i] == '/')
390 /* Like the basename() function, but does not modify @path; it just returns a
392 const char *path_basename(const char *path)
394 const char *p = path;
399 /* Trailing slashes. */
400 while ((p != path - 1) && *p == '/')
403 while ((p != path - 1) && *p != '/')
410 * Splits a file path into the part before the first '/', or the entire name if
411 * there is no '/', and the part after the first sequence of '/' characters.
413 * @path: The file path to split.
414 * @first_part_len_ret: A pointer to a `size_t' into which the length of the
415 * first part of the path will be returned.
416 * @return: A pointer to the next part of the path, after the first
417 * sequence of '/', or a pointer to the terminating
418 * null byte in the case of a path without any '/'.
420 const char *path_next_part(const char *path, size_t *first_part_len_ret)
423 const char *next_part;
426 while (path[i] != '/' && path[i] != '\0')
428 if (first_part_len_ret)
429 *first_part_len_ret = i;
430 next_part = &path[i];
431 while (*next_part == '/')
436 /* Returns the number of components of @path. */
437 int get_num_path_components(const char *path)
439 int num_components = 0;
445 while (*path && *path != '/')
448 return num_components;
453 * Prints a string. Printable characters are printed as-is, while unprintable
454 * characters are printed as their octal escape codes.
456 void print_string(const void *string, size_t len)
458 const u8 *p = string;
464 printf("\\%03hho", *p);
469 /* Calculates the SHA1 message digest given the name of a file.
470 * @buf must point to a buffer of length 20 bytes into which the message digest
473 int sha1sum(const char *filename, void *buf)
478 fp = fopen(filename, "rb");
480 ERROR("Cannot open the file `%s' for reading: %m\n", filename);
481 return WIMLIB_ERR_OPEN;
483 ret = sha1_stream(fp, buf);