s3fs-fuse/test/junk_data.c
Andrew Gaul 86317dd185
Replace dd if=/dev/urandom with junk data generator (#1786)
This reduces test run time for a single flag from 73 to 60 seconds.
2021-10-28 22:54:25 +09:00

43 lines
1.4 KiB
C

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