fallocate.c\linux\src - musl - musl - an implementation of the standard library for Linux-based systems

#define _GNU_SOURCE
#include <fcntl.h>
#include "syscall.h"
int fallocate(int fd, int mode, off_t base, off_t len)
{
	return syscall(SYS_fallocate, fd, mode, __SYSCALL_LL_E(base),
		__SYSCALL_LL_E(len));
}