1 #define _GNU_SOURCE
2 #include <fcntl.h>
3 #include <errno.h>
4 #include "syscall.h"
5
sync_file_range(int fd,off_t pos,off_t len,unsigned flags)6 int sync_file_range(int fd, off_t pos, off_t len, unsigned flags)
7 {
8 #if defined(SYS_sync_file_range2)
9 return syscall(SYS_sync_file_range2, fd, flags,
10 __SYSCALL_LL_E(pos), __SYSCALL_LL_E(len));
11 #elif defined(SYS_sync_file_range)
12 return syscall(SYS_sync_file_range, fd,
13 __SYSCALL_LL_O(pos), __SYSCALL_LL_E(len), flags);
14 #else
15 return __syscall_ret(-ENOSYS);
16 #endif
17 }
18