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/*
* Support for decoding of NS_* ioctl commands.
*
* Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a@gmail.com>
* Copyright (c) 2017-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "nsfs.h"
int
nsfs_ioctl(struct tcb *tcp, unsigned int code, kernel_ulong_t arg)
{
unsigned int uid;
switch (code) {
case NS_GET_USERNS:
case NS_GET_PARENT:
return RVAL_IOCTL_DECODED | RVAL_FD;
case NS_GET_NSTYPE:
if (entering(tcp))
return 0;
if (!syserror(tcp))
tcp->auxstr = xlookup(setns_types, tcp->u_rval);
return RVAL_IOCTL_DECODED | RVAL_STR;
case NS_GET_OWNER_UID:
if (entering(tcp))
return 0;
tprints(", ");
if (!umove_or_printaddr(tcp, arg, &uid)) {
printuid("[", uid);
tprints("]");
}
return RVAL_IOCTL_DECODED;
default:
return RVAL_DECODED;
}
}
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