Dmitry V. Levin
b93d52fe3d
strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
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* Copyright (c) 2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#include "defs.h"
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#include "print_fields.h"
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#include <linux/types.h>
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#include <linux/random.h>
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#define XLAT_MACROS_ONLY
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# include "xlat/random_ioctl_cmds.h"
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#undef XLAT_MACROS_ONLY
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/*
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* RNDGETPOOL was removed in 2.6.9, so non-ancient kernels always
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* return -EINVAL for that.
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*/
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int
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random_ioctl(struct tcb *const tcp, const unsigned int code,
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const kernel_ulong_t arg)
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{
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struct rand_pool_info info;
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kernel_ulong_t buf;
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switch (code) {
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case RNDGETENTCNT:
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if (entering(tcp))
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return 0;
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ATTRIBUTE_FALLTHROUGH;
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case RNDADDTOENTCNT:
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tprints(", ");
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printnum_int(tcp, arg, "%d");
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break;
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case RNDADDENTROPY:
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tprints(", ");
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if (!umove_or_printaddr(tcp, arg, &info)) {
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PRINT_FIELD_D("{", info, entropy_count);
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PRINT_FIELD_D(", ", info, buf_size);
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tprints(", buf=");
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buf = arg + offsetof(struct rand_pool_info, buf);
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printstrn(tcp, buf, info.buf_size);
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tprints("}");
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}
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break;
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/* ioctls with no parameters */
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case RNDZAPENTCNT:
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case RNDCLEARPOOL:
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case RNDRESEEDCRNG:
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break;
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default:
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return RVAL_DECODED;
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}
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return RVAL_IOCTL_DECODED;
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}
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