89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
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* This file is part of vmsplice strace test.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#if defined __NR_vmsplice
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# include <assert.h>
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# include <stdio.h>
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# include <unistd.h>
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# include <sys/uio.h>
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int
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main(void)
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{
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tprintf("%s", "");
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int fds[2];
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if (pipe(fds))
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perror_msg_and_fail("pipe");
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assert(0 == fds[0]);
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assert(1 == fds[1]);
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static const char w0_c[] = "012";
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const char *w0_d = hexdump_strdup(w0_c);
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void *w0 = tail_memdup(w0_c, LENGTH_OF(w0_c));
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static const char w1_c[] = "34567";
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const char *w1_d = hexdump_strdup(w1_c);
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void *w1 = tail_memdup(w1_c, LENGTH_OF(w1_c));
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static const char w2_c[] = "89abcde";
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const char *w2_d = hexdump_strdup(w2_c);
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void *w2 = tail_memdup(w2_c, LENGTH_OF(w2_c));
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const struct iovec iov_[] = {
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{
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.iov_base = w0,
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.iov_len = LENGTH_OF(w0_c)
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}, {
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.iov_base = w1,
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.iov_len = LENGTH_OF(w1_c)
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}, {
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.iov_base = w2,
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.iov_len = LENGTH_OF(w2_c)
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}
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};
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const struct iovec *iov = tail_memdup(iov_, sizeof(iov_));
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const unsigned int len =
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LENGTH_OF(w0_c) + LENGTH_OF(w1_c) + LENGTH_OF(w2_c);
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tprintf("vmsplice(1, [{iov_base=\"%s\", iov_len=%u}"
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", {iov_base=\"%s\", iov_len=%u}"
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", {iov_base=\"%s\", iov_len=%u}], %u, %s) = %u\n"
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" * %u bytes in buffer 0\n"
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" | 00000 %-49s %-16s |\n"
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" * %u bytes in buffer 1\n"
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" | 00000 %-49s %-16s |\n"
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" * %u bytes in buffer 2\n"
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" | 00000 %-49s %-16s |\n",
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w0_c, LENGTH_OF(w0_c), w1_c, LENGTH_OF(w1_c),
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w2_c, LENGTH_OF(w2_c), (unsigned int) ARRAY_SIZE(iov_),
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"SPLICE_F_NONBLOCK", len,
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LENGTH_OF(w0_c), w0_d, w0_c,
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LENGTH_OF(w1_c), w1_d, w1_c, LENGTH_OF(w2_c), w2_d, w2_c);
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const long rc = syscall(__NR_vmsplice, 1, iov, ARRAY_SIZE(iov_), 2);
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if (rc < 0)
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perror_msg_and_skip("vmsplice");
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assert(rc == (int) len);
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tprintf("+++ exited with 0 +++\n");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_vmsplice")
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#endif
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