/******************************************************************************
*
* Module Name: osunixdir - Unix directory access interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2016, 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.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <fnmatch.h>
#include <sys/stat.h>
/*
* Allocated structure returned from OsOpenDirectory
*/
typedef struct ExternalFindInfo
{
char *DirPathname;
DIR *DirPtr;
char temp_buffer[256];
char *WildcardSpec;
char RequestedFileType;
} EXTERNAL_FIND_INFO;
/*******************************************************************************
*
* FUNCTION: AcpiOsOpenDirectory
*
* PARAMETERS: DirPathname - Full pathname to the directory
* WildcardSpec - 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 *
AcpiOsOpenDirectory (
char *DirPathname,
char *WildcardSpec,
char RequestedFileType)
{
EXTERNAL_FIND_INFO *ExternalInfo;
DIR *dir;
/* Allocate the info struct that will be returned to the caller */
ExternalInfo = calloc (1, sizeof (EXTERNAL_FIND_INFO));
if (!ExternalInfo)
{
return (NULL);
}
/* Get the directory stream */
dir = opendir (DirPathname);
if (!dir)
{
fprintf (stderr, "Cannot open directory - %s\n", DirPathname);
free (ExternalInfo);
return (NULL);
}
/* Save the info in the return structure */
ExternalInfo->WildcardSpec = WildcardSpec;
ExternalInfo->RequestedFileType = RequestedFileType;
ExternalInfo->DirPathname = DirPathname;
ExternalInfo->DirPtr = dir;
return (ExternalInfo);
}
/*******************************************************************************
*
* FUNCTION: AcpiOsGetNextFilename
*
* PARAMETERS: DirHandle - Created via AcpiOsOpenDirectory
*
* RETURN: Next filename matched. NULL if no more matches.
*
* DESCRIPTION: Get the next file in the directory that matches the wildcard
* specification.
*
******************************************************************************/
char *
AcpiOsGetNextFilename (
void *DirHandle)
{
EXTERNAL_FIND_INFO *ExternalInfo = DirHandle;
struct dirent *dir_entry;
char *temp_str;
int str_len;
struct stat temp_stat;
int err;
while ((dir_entry = readdir (ExternalInfo->DirPtr)))
{
if (!fnmatch (ExternalInfo->WildcardSpec, dir_entry->d_name, 0))
{
if (dir_entry->d_name[0] == '.')
{
continue;
}
str_len = strlen (dir_entry->d_name) +
strlen (ExternalInfo->DirPathname) + 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, ExternalInfo->DirPathname);
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)
&& (ExternalInfo->RequestedFileType == REQUEST_DIR_ONLY))
||
((!S_ISDIR (temp_stat.st_mode)
&& ExternalInfo->RequestedFileType == REQUEST_FILE_ONLY)))
{
/* copy to a temp buffer because dir_entry struct is on the stack */
strcpy (ExternalInfo->temp_buffer, dir_entry->d_name);
return (ExternalInfo->temp_buffer);
}
}
}
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: AcpiOsCloseDirectory
*
* PARAMETERS: DirHandle - Created via AcpiOsOpenDirectory
*
* RETURN: None.
*
* DESCRIPTION: Close the open directory and cleanup.
*
******************************************************************************/
void
AcpiOsCloseDirectory (
void *DirHandle)
{
EXTERNAL_FIND_INFO *ExternalInfo = DirHandle;
/* Close the directory and free allocations */
closedir (ExternalInfo->DirPtr);
free (DirHandle);
}