125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 2016 Mariusz Zaborski <oshogbo@FreeBSD.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 AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _CAPSICUM_HELPERS_H_
|
|
#define _CAPSICUM_HELPERS_H_
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/capsicum.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <errno.h>
|
|
#include <nl_types.h>
|
|
#include <termios.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#define CAPH_IGNORE_EBADF 0x0001
|
|
#define CAPH_READ 0x0002
|
|
#define CAPH_WRITE 0x0004
|
|
#define CAPH_LOOKUP 0x0008
|
|
|
|
static __inline int
|
|
caph_limit_stream(int fd, int flags)
|
|
{
|
|
cap_rights_t rights;
|
|
unsigned long cmds[] = { TIOCGETA, TIOCGWINSZ, FIODTYPE };
|
|
|
|
cap_rights_init(&rights, CAP_FCNTL, CAP_FSTAT, CAP_IOCTL, CAP_SEEK);
|
|
|
|
if ((flags & CAPH_READ) != 0)
|
|
cap_rights_set(&rights, CAP_READ);
|
|
if ((flags & CAPH_WRITE) != 0)
|
|
cap_rights_set(&rights, CAP_WRITE);
|
|
if ((flags & CAPH_LOOKUP) != 0)
|
|
cap_rights_set(&rights, CAP_LOOKUP);
|
|
|
|
if (cap_rights_limit(fd, &rights) < 0 && errno != ENOSYS) {
|
|
if (errno == EBADF && (flags & CAPH_IGNORE_EBADF) != 0)
|
|
return (0);
|
|
return (-1);
|
|
}
|
|
|
|
if (cap_ioctls_limit(fd, cmds, nitems(cmds)) < 0 && errno != ENOSYS)
|
|
return (-1);
|
|
|
|
if (cap_fcntls_limit(fd, CAP_FCNTL_GETFL) < 0 && errno != ENOSYS)
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static __inline int
|
|
caph_limit_stdin(void)
|
|
{
|
|
|
|
return (caph_limit_stream(STDIN_FILENO, CAPH_READ));
|
|
}
|
|
|
|
static __inline int
|
|
caph_limit_stderr(void)
|
|
{
|
|
|
|
return (caph_limit_stream(STDERR_FILENO, CAPH_WRITE));
|
|
}
|
|
|
|
static __inline int
|
|
caph_limit_stdout(void)
|
|
{
|
|
|
|
return (caph_limit_stream(STDOUT_FILENO, CAPH_WRITE));
|
|
}
|
|
|
|
static __inline int
|
|
caph_limit_stdio(void)
|
|
{
|
|
const int iebadf = CAPH_IGNORE_EBADF;
|
|
|
|
if (caph_limit_stream(STDIN_FILENO, CAPH_READ | iebadf) == -1 ||
|
|
caph_limit_stream(STDOUT_FILENO, CAPH_WRITE | iebadf) == -1 ||
|
|
caph_limit_stream(STDERR_FILENO, CAPH_WRITE | iebadf) == -1)
|
|
return (-1);
|
|
return (0);
|
|
}
|
|
|
|
static __inline void
|
|
caph_cache_tzdata(void)
|
|
{
|
|
|
|
tzset();
|
|
}
|
|
|
|
static __inline void
|
|
caph_cache_catpages(void)
|
|
{
|
|
|
|
(void)catopen("libc", NL_CAT_LOCALE);
|
|
}
|
|
|
|
#endif /* _CAPSICUM_HELPERS_H_ */
|