+enum pattern_type {
+ NONE = 0,
+ EXCLUSION_LIST,
+ EXCLUSION_EXCEPTION,
+ COMPRESSION_EXCLUSION_LIST,
+ ALIGNMENT_LIST,
+};
+
+/* Default capture configuration file when none is specified. */
+static const char *default_config =
+"[ExclusionList]\n"
+"\\$ntfs.log\n"
+"\\hiberfil.sys\n"
+"\\pagefile.sys\n"
+"\\System Volume Information\n"
+"\\RECYCLER\n"
+"\\Windows\\CSC\n"
+"\n"
+"[CompressionExclusionList]\n"
+"*.mp3\n"
+"*.zip\n"
+"*.cab\n"
+"\\WINDOWS\\inf\\*.pnf\n";
+
+static void destroy_pattern_list(struct pattern_list *list)
+{
+ FREE(list->pats);
+}
+
+static void destroy_capture_config(struct capture_config *config)
+{
+ destroy_pattern_list(&config->exclusion_list);
+ destroy_pattern_list(&config->exclusion_exception);
+ destroy_pattern_list(&config->compression_exclusion_list);
+ destroy_pattern_list(&config->alignment_list);
+ FREE(config->config_str);
+ FREE(config->prefix);
+ memset(config, 0, sizeof(*config));
+}
+
+static int pattern_list_add_pattern(struct pattern_list *list,
+ const char *pattern)
+{
+ const char **pats;
+ if (list->num_pats >= list->num_allocated_pats) {
+ pats = REALLOC(list->pats,
+ sizeof(list->pats[0]) * (list->num_allocated_pats + 8));
+ if (!pats)
+ return WIMLIB_ERR_NOMEM;
+ list->num_allocated_pats += 8;
+ list->pats = pats;
+ }
+ list->pats[list->num_pats++] = pattern;
+ return 0;
+}
+
+/* Parses the contents of the image capture configuration file and fills in a
+ * `struct capture_config'. */
+static int init_capture_config(const char *_config_str, size_t config_len,
+ const char *_prefix, struct capture_config *config)
+{
+ char *config_str;
+ char *prefix;
+ char *p;
+ char *eol;
+ char *next_p;
+ size_t bytes_remaining;
+ enum pattern_type type = NONE;
+ int ret;
+ unsigned long line_no = 0;
+
+ DEBUG("config_len = %zu", config_len);
+ bytes_remaining = config_len;
+ memset(config, 0, sizeof(*config));
+ config_str = MALLOC(config_len);
+ if (!config_str) {
+ ERROR("Could not duplicate capture config string");
+ return WIMLIB_ERR_NOMEM;
+ }
+ prefix = STRDUP(_prefix);
+ if (!prefix) {
+ FREE(config_str);
+ return WIMLIB_ERR_NOMEM;
+ }
+
+ memcpy(config_str, _config_str, config_len);
+ next_p = config_str;
+ config->config_str = config_str;
+ config->prefix = prefix;
+ config->prefix_len = strlen(prefix);
+ while (bytes_remaining) {
+ line_no++;
+ p = next_p;
+ eol = memchr(p, '\n', bytes_remaining);
+ if (!eol) {
+ ERROR("Expected end-of-line in capture config file on "
+ "line %lu", line_no);
+ ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
+ goto out_destroy;
+ }
+
+ next_p = eol + 1;
+ bytes_remaining -= (eol - p) + 1;
+ if (eol == p)
+ continue;
+
+ if (*(eol - 1) == '\r')
+ eol--;
+ *eol = '\0';
+
+ /* Translate backslash to forward slash */
+ for (char *pp = p; pp != eol; pp++)
+ if (*pp == '\\')
+ *pp = '/';
+
+ /* Remove drive letter */
+ if (eol - p > 2 && isalpha(*p) && *(p + 1) == ':')
+ p += 2;
+
+ ret = 0;
+ if (strcmp(p, "[ExclusionList]") == 0)
+ type = EXCLUSION_LIST;
+ else if (strcmp(p, "[ExclusionException]") == 0)
+ type = EXCLUSION_EXCEPTION;
+ else if (strcmp(p, "[CompressionExclusionList]") == 0)
+ type = COMPRESSION_EXCLUSION_LIST;
+ else if (strcmp(p, "[AlignmentList]") == 0)
+ type = ALIGNMENT_LIST;
+ else if (p[0] == '[' && strrchr(p, ']')) {
+ ERROR("Unknown capture configuration section `%s'", p);
+ ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
+ goto out_destroy;
+ } else switch (type) {
+ case EXCLUSION_LIST:
+ DEBUG("Adding pattern \"%s\" to exclusion list", p);
+ ret = pattern_list_add_pattern(&config->exclusion_list, p);
+ break;
+ case EXCLUSION_EXCEPTION:
+ DEBUG("Adding pattern \"%s\" to exclusion exception list", p);
+ ret = pattern_list_add_pattern(&config->exclusion_exception, p);
+ break;
+ case COMPRESSION_EXCLUSION_LIST:
+ DEBUG("Adding pattern \"%s\" to compression exclusion list", p);
+ ret = pattern_list_add_pattern(&config->compression_exclusion_list, p);
+ break;
+ case ALIGNMENT_LIST:
+ DEBUG("Adding pattern \"%s\" to alignment list", p);
+ ret = pattern_list_add_pattern(&config->alignment_list, p);
+ break;
+ default:
+ ERROR("Line %lu of capture configuration is not "
+ "in a block (such as [ExclusionList])",
+ line_no);
+ ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG;
+ goto out_destroy;
+ }
+ if (ret != 0)
+ goto out_destroy;
+ }
+ return 0;
+out_destroy:
+ destroy_capture_config(config);
+ return ret;
+}
+
+static bool match_pattern(const char *path, const char *path_basename,
+ const struct pattern_list *list)
+{
+ for (size_t i = 0; i < list->num_pats; i++) {
+ const char *pat = list->pats[i];
+ const char *string;
+ if (pat[0] == '/')
+ /* Absolute path from root of capture */
+ string = path;
+ else {
+ if (strchr(pat, '/'))
+ /* Relative path from root of capture */
+ string = path + 1;
+ else
+ /* A file name pattern */
+ string = path_basename;
+ }
+ if (fnmatch(pat, string, FNM_PATHNAME
+ #ifdef FNM_CASEFOLD
+ | FNM_CASEFOLD
+ #endif
+ ) == 0)
+ {
+ DEBUG("`%s' matches the pattern \"%s\"",
+ string, pat);
+ return true;
+ }
+ }
+ return false;
+}
+
+static void print_pattern_list(const struct pattern_list *list)
+{
+ for (size_t i = 0; i < list->num_pats; i++)
+ printf(" %s\n", list->pats[i]);
+}
+
+static void print_capture_config(const struct capture_config *config)
+{
+ if (config->exclusion_list.num_pats) {
+ puts("Files or folders excluded from image capture:");
+ print_pattern_list(&config->exclusion_list);
+ putchar('\n');
+ }
+}
+
+/* Return true if the image capture configuration file indicates we should
+ * exclude the filename @path from capture.
+ *
+ * If @exclude_prefix is %true, the part of the path up and including the name
+ * of the directory being captured is not included in the path for matching
+ * purposes. This allows, for example, a pattern like /hiberfil.sys to match a
+ * file /mnt/windows7/hiberfil.sys if we are capturing the /mnt/windows7
+ * directory.
+ */
+bool exclude_path(const char *path, const struct capture_config *config,
+ bool exclude_prefix)
+{
+ const char *basename = path_basename(path);
+ if (exclude_prefix) {
+ wimlib_assert(strlen(path) >= config->prefix_len);
+ if (memcmp(config->prefix, path, config->prefix_len) == 0
+ && path[config->prefix_len] == '/')
+ path += config->prefix_len;
+ }
+ return match_pattern(path, basename, &config->exclusion_list) &&
+ !match_pattern(path, basename, &config->exclusion_exception);
+
+}
+
+
+