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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.02/******************************************************************************3 *4 * Module Name: osunixdir - Unix directory access interfaces5 *6 * Copyright (C) 2000 - 2023, Intel Corp.7 *8 *****************************************************************************/9 10#include <acpi/acpi.h>11 12#include <stdio.h>13#include <stdlib.h>14#include <string.h>15#include <dirent.h>16#include <fnmatch.h>17#include <ctype.h>18#include <sys/stat.h>19 20/*21 * Allocated structure returned from os_open_directory22 */23typedef struct external_find_info {24 char *dir_pathname;25 DIR *dir_ptr;26 char temp_buffer[256];27 char *wildcard_spec;28 char requested_file_type;29 30} external_find_info;31 32/*******************************************************************************33 *34 * FUNCTION: acpi_os_open_directory35 *36 * PARAMETERS: dir_pathname - Full pathname to the directory37 * wildcard_spec - string of the form "*.c", etc.38 *39 * RETURN: A directory "handle" to be used in subsequent search operations.40 * NULL returned on failure.41 *42 * DESCRIPTION: Open a directory in preparation for a wildcard search43 *44 ******************************************************************************/45 46void *acpi_os_open_directory(char *dir_pathname,47 char *wildcard_spec, char requested_file_type)48{49 struct external_find_info *external_info;50 DIR *dir;51 52 /* Allocate the info struct that will be returned to the caller */53 54 external_info = calloc(1, sizeof(struct external_find_info));55 if (!external_info) {56 return (NULL);57 }58 59 /* Get the directory stream */60 61 dir = opendir(dir_pathname);62 if (!dir) {63 fprintf(stderr, "Cannot open directory - %s\n", dir_pathname);64 free(external_info);65 return (NULL);66 }67 68 /* Save the info in the return structure */69 70 external_info->wildcard_spec = wildcard_spec;71 external_info->requested_file_type = requested_file_type;72 external_info->dir_pathname = dir_pathname;73 external_info->dir_ptr = dir;74 return (external_info);75}76 77/*******************************************************************************78 *79 * FUNCTION: acpi_os_get_next_filename80 *81 * PARAMETERS: dir_handle - Created via acpi_os_open_directory82 *83 * RETURN: Next filename matched. NULL if no more matches.84 *85 * DESCRIPTION: Get the next file in the directory that matches the wildcard86 * specification.87 *88 ******************************************************************************/89 90char *acpi_os_get_next_filename(void *dir_handle)91{92 struct external_find_info *external_info = dir_handle;93 struct dirent *dir_entry;94 char *temp_str;95 int str_len;96 struct stat temp_stat;97 int err;98 99 while ((dir_entry = readdir(external_info->dir_ptr))) {100 if (!fnmatch101 (external_info->wildcard_spec, dir_entry->d_name, 0)) {102 if (dir_entry->d_name[0] == '.') {103 continue;104 }105 106 str_len = strlen(dir_entry->d_name) +107 strlen(external_info->dir_pathname) + 2;108 109 temp_str = calloc(str_len, 1);110 if (!temp_str) {111 fprintf(stderr,112 "Could not allocate buffer for temporary string\n");113 return (NULL);114 }115 116 strcpy(temp_str, external_info->dir_pathname);117 strcat(temp_str, "/");118 strcat(temp_str, dir_entry->d_name);119 120 err = stat(temp_str, &temp_stat);121 if (err == -1) {122 fprintf(stderr,123 "Cannot stat file (should not happen) - %s\n",124 temp_str);125 free(temp_str);126 return (NULL);127 }128 129 free(temp_str);130 131 if ((S_ISDIR(temp_stat.st_mode)132 && (external_info->requested_file_type ==133 REQUEST_DIR_ONLY))134 || ((!S_ISDIR(temp_stat.st_mode)135 && external_info->requested_file_type ==136 REQUEST_FILE_ONLY))) {137 138 /* copy to a temp buffer because dir_entry struct is on the stack */139 140 strcpy(external_info->temp_buffer,141 dir_entry->d_name);142 return (external_info->temp_buffer);143 }144 }145 }146 147 return (NULL);148}149 150/*******************************************************************************151 *152 * FUNCTION: acpi_os_close_directory153 *154 * PARAMETERS: dir_handle - Created via acpi_os_open_directory155 *156 * RETURN: None.157 *158 * DESCRIPTION: Close the open directory and cleanup.159 *160 ******************************************************************************/161 162void acpi_os_close_directory(void *dir_handle)163{164 struct external_find_info *external_info = dir_handle;165 166 /* Close the directory and free allocations */167 168 closedir(external_info->dir_ptr);169 free(dir_handle);170}171