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/*
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
#include <errno.h>
int main(int argc, char* argv[])
{
int fd;
int i;
fd= open("fsynctestdata",O_CREAT|O_RDWR|O_SYNC|O_DSYNC);
assert(fd > 0);
assert(errno == 0);
for (i = 0; i < 1000; ++i) {
write(fd, "a", 1);
assert(errno == 0);
fsync(fd);
assert(errno == 0);
write(fd, "a", 1);
assert(errno == 0);
fdatasync(fd);
assert(errno == 0);
write(fd, "a", 1);
assert(errno == 0);
sync();
assert(errno == 0);
}
close(fd);
unlink("fsynctestdata");
msync(0,0,0);
assert(errno == 0);
return 0;
}
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