2 * capture_common.c - Mostly code to handle excluding paths from capture.
6 * Copyright (C) 2013 Eric Biggers
8 * This file is part of wimlib, a library for working with WIM files.
10 * wimlib is free software; you can redistribute it and/or modify it under the
11 * terms of the GNU General Public License as published by the Free
12 * Software Foundation; either version 3 of the License, or (at your option)
15 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
16 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
17 * A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License
21 * along with wimlib; if not, see http://www.gnu.org/licenses/.
24 #include "wimlib_internal.h"
35 canonicalize_pattern(const tchar *pat, tchar **canonical_pat_ret)
39 if (pat[0] != T('/') && pat[0] != T('\\') &&
40 pat[0] != T('\0') && pat[1] == T(':'))
42 /* Pattern begins with drive letter */
43 if (pat[2] != T('/') && pat[2] != T('\\')) {
44 /* Something like c:file, which is actually a path
45 * relative to the current working directory on the c:
46 * drive. We require paths with drive letters to be
48 ERROR("Invalid path \"%"TS"\"; paths including drive letters "
49 "must be absolute!", pat);
50 ERROR("Maybe try \"%"TC":/%"TS"\"?",
52 return WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
55 WARNING("Pattern \"%"TS"\" starts with a drive letter, which is "
56 "being removed.", pat);
57 /* Strip the drive letter */
60 canonical_pat = canonicalize_fs_path(pat);
62 return WIMLIB_ERR_NOMEM;
63 *canonical_pat_ret = canonical_pat;
68 copy_and_canonicalize_pattern_list(const struct wimlib_pattern_list *list,
69 struct wimlib_pattern_list *copy)
73 copy->pats = CALLOC(list->num_pats, sizeof(list->pats[0]));
75 return WIMLIB_ERR_NOMEM;
76 copy->num_pats = list->num_pats;
77 for (size_t i = 0; i < list->num_pats; i++) {
78 ret = canonicalize_pattern(list->pats[i], ©->pats[i]);
86 copy_and_canonicalize_capture_config(const struct wimlib_capture_config *config,
87 struct wimlib_capture_config **config_copy_ret)
89 struct wimlib_capture_config *config_copy;
92 config_copy = CALLOC(1, sizeof(struct wimlib_capture_config));
94 ret = WIMLIB_ERR_NOMEM;
95 goto out_free_capture_config;
97 ret = copy_and_canonicalize_pattern_list(&config->exclusion_pats,
98 &config_copy->exclusion_pats);
100 goto out_free_capture_config;
101 ret = copy_and_canonicalize_pattern_list(&config->exclusion_exception_pats,
102 &config_copy->exclusion_exception_pats);
104 goto out_free_capture_config;
105 *config_copy_ret = config_copy;
107 out_free_capture_config:
108 free_capture_config(config_copy);
114 destroy_pattern_list(struct wimlib_pattern_list *list)
116 for (size_t i = 0; i < list->num_pats; i++)
122 free_capture_config(struct wimlib_capture_config *config)
125 destroy_pattern_list(&config->exclusion_pats);
126 destroy_pattern_list(&config->exclusion_exception_pats);
132 match_pattern(const tchar *path,
133 const tchar *path_basename,
134 const struct wimlib_pattern_list *list)
136 for (size_t i = 0; i < list->num_pats; i++) {
138 const tchar *pat = list->pats[i];
141 if (*pat == T('/')) {
142 /* Absolute path from root of capture */
145 if (tstrchr(pat, T('/')))
146 /* Relative path from root of capture */
149 /* A file name pattern */
150 string = path_basename;
153 /* Warning: on Windows native builds, fnmatch() calls the
154 * replacement function in win32.c. */
155 if (fnmatch(pat, string, FNM_PATHNAME | FNM_NOESCAPE
161 DEBUG("\"%"TS"\" matches the pattern \"%"TS"\"",
165 DEBUG2("\"%"TS"\" does not match the pattern \"%"TS"\"",
172 /* Return true if the image capture configuration file indicates we should
173 * exclude the filename @path from capture.
175 * If @exclude_prefix is %true, the part of the path up and including the name
176 * of the directory being captured is not included in the path for matching
177 * purposes. This allows, for example, a pattern like /hiberfil.sys to match a
178 * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7
182 exclude_path(const tchar *path, size_t path_len,
183 const struct wimlib_capture_config *config, bool exclude_prefix)
187 const tchar *basename = path_basename_with_len(path, path_len);
188 if (exclude_prefix) {
189 wimlib_assert(path_len >= config->_prefix_num_tchars);
190 if (!tmemcmp(config->_prefix, path, config->_prefix_num_tchars) &&
191 path[config->_prefix_num_tchars] == T('/'))
193 path += config->_prefix_num_tchars;
196 return match_pattern(path, basename, &config->exclusion_pats) &&
197 !match_pattern(path, basename, &config->exclusion_exception_pats);