51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2021 Andrew Gaul <andrew@gaul.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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// Generate junk data at high speed. An alternative to dd if=/dev/urandom.
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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int main(int argc, const char *argv[])
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{
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if (argc != 2) {
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return 1;
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}
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uint64_t count = strtoull(argv[1], nullptr, 10);
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char buf[128 * 1024];
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for (uint64_t i = 0; i < count; i += sizeof(buf)) {
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for (uint64_t j = 0; j < sizeof(buf) / sizeof(i); ++j) {
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*(reinterpret_cast<uint64_t *>(buf) + j) = i / sizeof(i) + j;
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}
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fwrite(buf, 1, sizeof(buf) > count - i ? count - i : sizeof(buf), stdout);
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}
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return 0;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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