+ fprintf(out, " -h, --help\n");
+ fprintf(out, " show this help\n");
+ fprintf(out, " -v, --version\n");
+ fprintf(out, " print the version number\n");
+ fprintf(out, " -i, --index\n");
+ fprintf(out, " index mails\n");
+ fprintf(out, " -d <db filename>, --db-file <db filename>\n");
+ fprintf(out, " set the data-base file\n");
+ fprintf(out, " -s <search pattern>, --search <search pattern>\n");
+ fprintf(out, " search for matching mails in the data-base file\n");
+}
+
+/*********************************************************************/
+
+int ignore_entry(const char *name) {
+ return
+ /* strcmp(name, ".") == 0 || */
+ /* strcmp(name, "..") == 0 || */
+ (name[0] == '.' && name[1] != '/');
+}
+
+void search_in_db(const char *search_name, const char *search_regexp_string,
+ FILE *db_file) {
+
+ char raw_line[BUFFER_SIZE];
+ char current_mail_filename[PATH_MAX + 1];
+ unsigned long int current_position_in_mail;
+ char *name, *value;
+ regex_t regexp;
+ int already_written;
+
+ if(regcomp(®exp,
+ search_regexp_string,
+ REG_ICASE)) {
+ fprintf(stderr,
+ "mymail: Syntax error in regexp \"%s\" for field \"%s\".\n",
+ search_regexp_string,
+ search_name);
+ exit(EXIT_FAILURE);
+ }
+
+ current_position_in_mail = 0;
+ already_written = 0;
+
+ while(fgets(raw_line, BUFFER_SIZE, db_file)) {
+ name = raw_line;
+ value = segment_next_field(raw_line);
+
+ if(strcmp("mail", name) == 0) {
+ char *position_in_file_string = value;
+ char *mail_filename = segment_next_field(value);
+ current_position_in_mail = atol(position_in_file_string);
+ strcpy(current_mail_filename, mail_filename);
+ remove_eof(current_mail_filename);
+ already_written = 0;
+ }
+
+ else if(!already_written) {
+ if(strcmp(search_name, name) == 0 && regexec(®exp, value, 0, 0, 0) == 0) {
+ FILE *mail_file;
+ mail_file = fopen(current_mail_filename, "r");
+ if(!mail_file) {
+ fprintf(stderr, "mymail: Can not open '%s'.\n", current_mail_filename);
+ exit(EXIT_FAILURE);
+ }
+ fseek(mail_file, current_position_in_mail, SEEK_SET);
+ if(fgets(raw_line, BUFFER_SIZE, mail_file)) {
+ printf("%s", raw_line);
+ while(fgets(raw_line, BUFFER_SIZE, mail_file) &&
+ strncmp(raw_line, "From ", 5)) {
+ printf("%s", raw_line);
+ }
+ }
+ fclose(mail_file);
+ already_written = 1;
+ }
+ }
+ }
+
+ regfree(®exp);