/****************************************************************************** * * Module Name: osunixdir - Unix directory access interfaces * *****************************************************************************/ /* * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <dirent.h> #include <fnmatch.h> #include <ctype.h> #include <sys/stat.h> /* * Allocated structure returned from os_open_directory */ typedef struct external_find_info { char *dir_pathname; DIR *dir_ptr; char temp_buffer[256]; char *wildcard_spec; char requested_file_type; } external_find_info; /******************************************************************************* * * FUNCTION: acpi_os_open_directory * * PARAMETERS: dir_pathname - Full pathname to the directory * wildcard_spec - string of the form "*.c", etc. * * RETURN: A directory "handle" to be used in subsequent search operations. * NULL returned on failure. * * DESCRIPTION: Open a directory in preparation for a wildcard search * ******************************************************************************/ void *acpi_os_open_directory(char *dir_pathname, char *wildcard_spec, char requested_file_type) { struct external_find_info *external_info; DIR *dir; /* Allocate the info struct that will be returned to the caller */ external_info = calloc(1, sizeof(struct external_find_info)); if (!external_info) { return (NULL); } /* Get the directory stream */ dir = opendir(dir_pathname); if (!dir) { fprintf(stderr, "Cannot open directory - %s\n", dir_pathname); free(external_info); return (NULL); } /* Save the info in the return structure */ external_info->wildcard_spec = wildcard_spec; external_info->requested_file_type = requested_file_type; external_info->dir_pathname = dir_pathname; external_info->dir_ptr = dir; return (external_info); } /******************************************************************************* * * FUNCTION: acpi_os_get_next_filename * * PARAMETERS: dir_handle - Created via acpi_os_open_directory * * RETURN: Next filename matched. NULL if no more matches. * * DESCRIPTION: Get the next file in the directory that matches the wildcard * specification. * ******************************************************************************/ char *acpi_os_get_next_filename(void *dir_handle) { struct external_find_info *external_info = dir_handle; struct dirent *dir_entry; char *temp_str; int str_len; struct stat temp_stat; int err; while ((dir_entry = readdir(external_info->dir_ptr))) { if (!fnmatch (external_info->wildcard_spec, dir_entry->d_name, 0)) { if (dir_entry->d_name[0] == '.') { continue; } str_len = strlen(dir_entry->d_name) + strlen(external_info->dir_pathname) + 2; temp_str = calloc(str_len, 1); if (!temp_str) { fprintf(stderr, "Could not allocate buffer for temporary string\n"); return (NULL); } strcpy(temp_str, external_info->dir_pathname); strcat(temp_str, "/"); strcat(temp_str, dir_entry->d_name); err = stat(temp_str, &temp_stat); if (err == -1) { fprintf(stderr, "Cannot stat file (should not happen) - %s\n", temp_str); free(temp_str); return (NULL); } free(temp_str); if ((S_ISDIR(temp_stat.st_mode) && (external_info->requested_file_type == REQUEST_DIR_ONLY)) || ((!S_ISDIR(temp_stat.st_mode) && external_info->requested_file_type == REQUEST_FILE_ONLY))) { /* copy to a temp buffer because dir_entry struct is on the stack */ strcpy(external_info->temp_buffer, dir_entry->d_name); return (external_info->temp_buffer); } } } return (NULL); } /******************************************************************************* * * FUNCTION: acpi_os_close_directory * * PARAMETERS: dir_handle - Created via acpi_os_open_directory * * RETURN: None. * * DESCRIPTION: Close the open directory and cleanup. * ******************************************************************************/ void acpi_os_close_directory(void *dir_handle) { struct external_find_info *external_info = dir_handle; /* Close the directory and free allocations */ closedir(external_info->dir_ptr); free(dir_handle); }