mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-20 23:17:29 +00:00
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/* $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp $ */
|
|
/*
|
|
* Copyright (c) 2004, Richard Levitte <richard@levitte.org>
|
|
* 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.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 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 MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* 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 DAMAGE.
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#ifndef LPDIR_H
|
|
#include "LPdir.h"
|
|
#endif
|
|
|
|
/* The POSIXly macro for the maximum number of characters in a file path
|
|
is NAME_MAX. However, some operating systems use PATH_MAX instead.
|
|
Therefore, it seems natural to first check for PATH_MAX and use that,
|
|
and if it doesn't exist, use NAME_MAX. */
|
|
#if defined(PATH_MAX)
|
|
# define LP_ENTRY_SIZE PATH_MAX
|
|
#elif defined(NAME_MAX)
|
|
# define LP_ENTRY_SIZE NAME_MAX
|
|
#endif
|
|
|
|
/* Of course, there's the possibility that neither PATH_MAX nor NAME_MAX
|
|
exist. It's also possible that NAME_MAX exists but is define to a
|
|
very small value (HP-UX offers 14), so we need to check if we got a
|
|
result, and if it meets a minimum standard, and create or change it
|
|
if not. */
|
|
#if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255
|
|
# undef LP_ENTRY_SIZE
|
|
# define LP_ENTRY_SIZE 255
|
|
#endif
|
|
|
|
struct LP_dir_context_st
|
|
{
|
|
DIR *dir;
|
|
char entry_name[LP_ENTRY_SIZE+1];
|
|
};
|
|
|
|
const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
|
|
{
|
|
struct dirent *direntry = NULL;
|
|
|
|
if (ctx == NULL || directory == NULL)
|
|
{
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
errno = 0;
|
|
if (*ctx == NULL)
|
|
{
|
|
*ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
|
|
if (*ctx == NULL)
|
|
{
|
|
errno = ENOMEM;
|
|
return 0;
|
|
}
|
|
memset(*ctx, '\0', sizeof(LP_DIR_CTX));
|
|
|
|
(*ctx)->dir = opendir(directory);
|
|
if ((*ctx)->dir == NULL)
|
|
{
|
|
int save_errno = errno; /* Probably not needed, but I'm paranoid */
|
|
free(*ctx);
|
|
*ctx = NULL;
|
|
errno = save_errno;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
direntry = readdir((*ctx)->dir);
|
|
if (direntry == NULL)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
strncpy((*ctx)->entry_name, direntry->d_name, sizeof((*ctx)->entry_name) - 1);
|
|
(*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0';
|
|
return (*ctx)->entry_name;
|
|
}
|
|
|
|
int LP_find_file_end(LP_DIR_CTX **ctx)
|
|
{
|
|
if (ctx != NULL && *ctx != NULL)
|
|
{
|
|
int ret = closedir((*ctx)->dir);
|
|
|
|
free(*ctx);
|
|
switch (ret)
|
|
{
|
|
case 0:
|
|
return 1;
|
|
case -1:
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|