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/*
* safepath: safe path traversal for POSIX systems
* Copyright 2022 Kaz Kylheku <kaz@kylheku.com>
*
* BSD-2 License
*
* 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 HOLDER 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.
*/
#ifndef SAFEPATH_3DFC_9950_H
#define SAFEPATH_3DFC_9950_H
#include <sys/types.h>
#include <stdio.h>
/*
* safepatch_check error codes
*/
enum {
SAFEPATH_OK, /* path appears safe */
SAFEPATH_UNSAFE, /* path traversible, unsafe */
SAFEPATH_PERM, /* path not traversible due to perms */
SAFEPATH_NOENT, /* component other than last doesn't exist */
SAFEPATH_NOTDIR, /* interior path component isn't a directory */
SAFEPATH_INVAL, /* path is invalid */
SAFEPATH_NOMEM, /* out of memory */
SAFEPATH_LOOP, /* more than 8 levels of symlink */
SAFEPATH_TOOLONG, /* component or symlink target too long */
};
int safepath_check(const char *name);
const char *safepath_strerr(int err);
/* Common POSIX API wrappers */
int safepath_open(const char *name, int flags);
int safepath_open_mode(const char *name, int flags, mode_t mode);
/* STDIO wrappers */
FILE* safepath_fopen(const char *name, const char *mode);
FILE* safepath_freopen(const char *name, const char *mode, FILE *);
#endif
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