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#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
int main() {
struct stat s;
int f = open("/test", O_RDWR, 0777);
printf("posix_fadvise: %d\n", posix_fadvise(f, 3, 2, POSIX_FADV_DONTNEED));
printf("errno: %d\n", errno);
printf("\n");
errno = 0;
printf("posix_fallocate: %d\n", posix_fallocate(f, 3, 2));
printf("errno: %d\n", errno);
stat("/test", &s);
printf("st_size: %d\n", s.st_size);
memset(&s, 0, sizeof s);
printf("\n");
errno = 0;
printf("posix_fallocate2: %d\n", posix_fallocate(f, 3, 7));
printf("errno: %d\n", errno);
stat("/test", &s);
printf("st_size: %d\n", s.st_size);
memset(&s, 0, sizeof s);
return 0;
}
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