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#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
int main(void)
{
int fd = open("foo", O_RDWR|O_CREAT, 0666);
if (fd < 0) return 1;
posix_fadvise( fd, 0, 4096, POSIX_FADV_WILLNEED );
posix_fadvise( fd, 0, 0, POSIX_FADV_NOREUSE );
int badfd = 42;
posix_fadvise( badfd, 0, 4096, POSIX_FADV_WILLNEED );
int x;
posix_fadvise(x, 1, 2, POSIX_FADV_NORMAL);
posix_fadvise(badfd, x, 2, POSIX_FADV_NORMAL);
posix_fadvise(badfd, 1, x, POSIX_FADV_NORMAL);
posix_fadvise(badfd, 1, 2, x);
x = posix_fadvise(badfd
, 1, 2, POSIX_FADV_NORMAL);
if (x != EBADF)
fprintf(stderr, "Unexpected return value: %d\n", x);
}
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