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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: osunixdir - Unix directory access interfaces
*
* Copyright (C) 2000 - 2020, 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);
}
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