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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: osunixdir - Unix directory access interfaces * * Copyright (C) 2000 - 2022, Intel Corp. * *****************************************************************************/ #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); } |