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);
58 WIMLIBAPI int wimlib_set_print_errors(bool show_error_messages)
60 #ifdef ENABLE_ERROR_MESSAGES
61 __wimlib_print_errors = show_error_messages;
64 if (show_error_messages)
65 return WIMLIB_ERR_UNSUPPORTED;
69 static const char *error_strings[] = {
72 [WIMLIB_ERR_COMPRESSED_LOOKUP_TABLE]
73 = "Lookup table is compressed",
74 [WIMLIB_ERR_DECOMPRESSION]
75 = "Failed to decompress compressed data",
76 [WIMLIB_ERR_DELETE_STAGING_DIR]
77 = "Failed to delete staging directory",
79 = "Failed to fork another process",
81 = "An error was returned by fuse_main()",
82 [WIMLIB_ERR_FUSERMOUNT]
83 = "Could not execute the `fusermount' program, or it exited "
84 "with a failure status",
85 [WIMLIB_ERR_IMAGE_COUNT]
86 = "Inconsistent image count among the metadata "
87 "resources, the WIM header, and/or the XML data",
88 [WIMLIB_ERR_IMAGE_NAME_COLLISION]
89 = "Tried to add an image with a name that is already in use",
90 [WIMLIB_ERR_INTEGRITY]
91 = "The WIM failed an integrity check",
92 [WIMLIB_ERR_INVALID_CHUNK_SIZE]
93 = "The WIM is compressed but does not have a chunk "
95 [WIMLIB_ERR_INVALID_COMPRESSION_TYPE]
96 = "The WIM is compressed, but is not marked as having LZX or "
98 [WIMLIB_ERR_INVALID_DENTRY]
99 = "A directory entry in the WIM was invalid",
100 [WIMLIB_ERR_INVALID_HEADER_SIZE]
101 = "The WIM header was not 208 bytes",
102 [WIMLIB_ERR_INVALID_IMAGE]
103 = "Tried to select an image that does not exist in the WIM",
104 [WIMLIB_ERR_INVALID_INTEGRITY_TABLE]
105 = "The WIM's integrity table is invalid",
106 [WIMLIB_ERR_INVALID_PARAM]
107 = "An invalid parameter was given",
108 [WIMLIB_ERR_INVALID_RESOURCE_SIZE]
109 = "A resource entry in the WIM is invalid",
111 = "Failed to create a hard or symbolic link when extracting "
112 "a file from the WIM",
114 = "Failed to create a directory",
116 = "Failed to create or use a POSIX message queue",
118 = "Ran out of memory",
120 = "Expected a directory",
121 [WIMLIB_ERR_NOT_A_WIM_FILE]
122 = "The file did not begin with the magic characters that "
123 "identify a WIM file",
124 [WIMLIB_ERR_NO_FILENAME]
125 = "The WIM is not identified with a filename",
127 = "Failed to open a file",
129 = "Failed to open a directory",
131 = "Could not read data from a file",
133 = "Could not rename a file",
135 = "The WIM is part of a split WIM, which Wimlib does not support",
137 = "Could not read the metadata for a file or directory",
140 [WIMLIB_ERR_UNKNOWN_VERSION]
141 = "The WIM file is marked with an unknown version number",
142 [WIMLIB_ERR_UNSUPPORTED]
143 = "The requested operation is unsupported",
145 = "Failed to write data to a file",
147 = "The XML data of the WIM is invalid",
150 WIMLIBAPI const char *wimlib_get_error_string(enum wimlib_error_code code)
152 if (code < WIMLIB_ERR_SUCCESS || code > WIMLIB_ERR_XML)
155 return error_strings[code];
160 #ifdef ENABLE_CUSTOM_MEMORY_ALLOCATOR
161 void *(*wimlib_malloc_func)(size_t) = malloc;
162 void (*wimlib_free_func)(void *) = free;
163 void *(*wimlib_realloc_func)(void *, size_t) = realloc;
165 void *wimlib_calloc(size_t nmemb, size_t size)
167 size_t total_size = nmemb * size;
168 void *p = MALLOC(total_size);
170 memset(p, 0, total_size);
174 char *wimlib_strdup(const char *str)
180 p = MALLOC(size + 1);
182 memcpy(p, str, size + 1);
186 extern void xml_set_memory_allocator(void *(*malloc_func)(size_t),
187 void (*free_func)(void *),
188 void *(*realloc_func)(void *, size_t));
191 WIMLIBAPI int wimlib_set_memory_allocator(void *(*malloc_func)(size_t),
192 void (*free_func)(void *),
193 void *(*realloc_func)(void *, size_t))
195 #ifdef ENABLE_CUSTOM_MEMORY_ALLOCATOR
196 wimlib_malloc_func = malloc_func ? malloc_func : malloc;
197 wimlib_free_func = free_func ? free_func : free;
198 wimlib_realloc_func = realloc_func ? realloc_func : realloc;
200 xml_set_memory_allocator(wimlib_malloc_func, wimlib_free_func,
201 wimlib_realloc_func);
203 ERROR("Cannot set custom memory allocator functions:\n");
204 ERROR("wimlib was compiled with the "
205 "--without-custom-memory-allocator flag\n");
206 return WIMLIB_ERR_UNSUPPORTED;
212 static iconv_t cd_utf16_to_utf8 = (iconv_t)(-1);
214 /* Converts a string in the UTF-16 encoding to a newly allocated string in the
216 char *utf16_to_utf8(const char *utf16_str, size_t utf16_len,
217 size_t *utf8_len_ret)
219 if (cd_utf16_to_utf8 == (iconv_t)(-1)) {
220 cd_utf16_to_utf8 = iconv_open("UTF-8", "UTF-16LE");
221 if (cd_utf16_to_utf8 == (iconv_t)-1) {
222 ERROR("Failed to get conversion descriptor for "
223 "converting UTF-16LE to UTF-8: %m\n");
227 size_t utf16_bytes_left = utf16_len;
228 size_t utf8_bytes_left = utf16_len;
230 char *utf8_str = MALLOC(utf8_bytes_left);
234 char *orig_utf8_str = utf8_str;
236 size_t num_chars_converted = iconv(cd_utf16_to_utf8, (char**)&utf16_str,
237 &utf16_bytes_left, &utf8_str, &utf8_bytes_left);
239 if (num_chars_converted == (size_t)(-1)) {
240 ERROR("Failed to convert UTF-16LE string to UTF-8 string: "
246 size_t utf8_len = utf16_len - utf8_bytes_left;
248 *utf8_len_ret = utf8_len;
249 orig_utf8_str[utf8_len] = '\0';
250 return orig_utf8_str;
253 static iconv_t cd_utf8_to_utf16 = (iconv_t)(-1);
255 /* Converts a string in the UTF-8 encoding to a newly allocated string in the
256 * UTF-16 encoding. */
257 char *utf8_to_utf16(const char *utf8_str, size_t utf8_len,
258 size_t *utf16_len_ret)
260 if (cd_utf8_to_utf16 == (iconv_t)(-1)) {
261 cd_utf8_to_utf16 = iconv_open("UTF-16LE", "UTF-8");
262 if (cd_utf8_to_utf16 == (iconv_t)-1) {
263 ERROR("Failed to get conversion descriptor for "
264 "converting UTF-8 to UTF-16LE: %m\n");
269 size_t utf8_bytes_left = utf8_len;
270 size_t utf16_capacity = utf8_len * 4;
271 size_t utf16_bytes_left = utf16_capacity;
273 char *utf16_str = MALLOC(utf16_capacity + 2);
277 char *orig_utf16_str = utf16_str;
279 size_t num_chars_converted = iconv(cd_utf8_to_utf16, (char**)&utf8_str,
280 &utf8_bytes_left, &utf16_str, &utf16_bytes_left);
282 if (num_chars_converted == (size_t)(-1)) {
283 ERROR("Failed to convert UTF-8 string to UTF-16LE string: "
286 "Not enough room in output buffer" :
288 FREE(orig_utf16_str);
292 size_t utf16_len = utf16_capacity - utf16_bytes_left;
294 *utf16_len_ret = utf16_len;
295 orig_utf16_str[utf16_len] = '\0';
296 orig_utf16_str[utf16_len + 1] = '\0';
297 return orig_utf16_str;
300 /* Write @n bytes from @buf to the file descriptor @fd, retrying on interupt and
303 * Returns short count and set errno on failure. */
304 ssize_t full_write(int fd, const void *buf, size_t n)
311 ret = write(fd, p, n);
325 static bool seeded = false;
327 /* Fills @n bytes pointed to by @p with random alphanumeric characters. */
328 void randomize_char_array_with_alnum(char p[], size_t n)
347 /* Fills @n bytes pointer to by @p with random numbers. */
348 void randomize_byte_array(void *__p, size_t n)
360 /* Takes in a path of length @len in @buf, and transforms it into a string for
361 * the path of its parent directory. */
362 void to_parent_name(char buf[], size_t len)
364 ssize_t i = (ssize_t)len - 1;
365 while (i >= 0 && buf[i] == '/')
367 while (i >= 0 && buf[i] != '/')
369 while (i >= 0 && buf[i] == '/')
374 /* Like the basename() function, but does not modify @path; it just returns a
376 const char *path_basename(const char *path)
378 const char *p = path;
383 /* Trailing slashes. */
384 while ((p != path - 1) && *p == '/')
387 while ((p != path - 1) && *p != '/')
394 * Splits a file path into the part before the first '/', or the entire name if
395 * there is no '/', and the part after the first sequence of '/' characters.
397 * @path: The file path to split.
398 * @first_part_len_ret: A pointer to a `size_t' into which the length of the
399 * first part of the path will be returned.
400 * @return: A pointer to the next part of the path, after the first
401 * sequence of '/', or a pointer to the terminating
402 * null byte in the case of a path without any '/'.
404 const char *path_next_part(const char *path, size_t *first_part_len_ret)
407 const char *next_part;
410 while (path[i] != '/' && path[i] != '\0')
412 if (first_part_len_ret)
413 *first_part_len_ret = i;
414 next_part = &path[i];
415 while (*next_part == '/')
420 /* Returns the number of components of @path. */
421 int get_num_path_components(const char *path)
423 int num_components = 0;
429 while (*path && *path != '/')
432 return num_components;
437 * Prints a string. Printable characters are printed as-is, while unprintable
438 * characters are printed as their octal escape codes.
440 void print_string(const void *string, size_t len)
442 const u8 *p = string;
448 printf("\\%03hho", *p);
453 /* Calculates the SHA1 message digest given the name of a file.
454 * @buf must point to a buffer of length 20 bytes into which the message digest
457 int sha1sum(const char *filename, void *buf)
462 fp = fopen(filename, "rb");
464 ERROR("Cannot open the file `%s' for reading: %m\n", filename);
465 return WIMLIB_ERR_OPEN;
467 ret = sha1_stream(fp, buf);