Dmitry V. Levin
22f8b2753c
When sendfile is called with a valid pointer to a file offset variable, kernel updates this variable on successfull exit from syscall. * sendfile.c (sys_sendfile, sys_sendfile64): Print tcp->u_arg[2] on exiting syscall as well as on entering.
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*
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* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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SYS_FUNC(sendfile64)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printfd(tcp, tcp->u_arg[1]);
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tprints(", ");
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if (!printnum_int64(tcp, tcp->u_arg[2], "%" PRIu64)) {
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tprintf(", %lu", tcp->u_arg[3]);
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return RVAL_DECODED;
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}
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} else {
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if (!syserror(tcp) && tcp->u_rval) {
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tprints(" => ");
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printnum_int64(tcp, tcp->u_arg[2], "%" PRIu64);
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}
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tprintf(", %lu", tcp->u_arg[3]);
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}
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return 0;
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}
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SYS_FUNC(sendfile)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printfd(tcp, tcp->u_arg[1]);
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tprints(", ");
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if (!printnum_ulong(tcp, tcp->u_arg[2])
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|| !tcp->u_arg[3]) {
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tprintf(", %lu", tcp->u_arg[3]);
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return RVAL_DECODED;
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}
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} else {
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if (!syserror(tcp) && tcp->u_rval) {
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tprints(" => ");
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printnum_ulong(tcp, tcp->u_arg[2]);
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}
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tprintf(", %lu", tcp->u_arg[3]);
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}
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return 0;
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}
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