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@(#)sync.2 6.2 (Berkeley) 6/30/85

C 4 sync, fsync - update dirty buffers and super-block

#include <unistd.h>

int sync(void)
int fsync(fd)

Sync causes all information in the file system buffers that should be on disk to be written out. This includes modified super blocks, modified i-nodes, and delayed block I/O. Fsync does the same thing, but only for the blocks associated with a specific file descriptor. Under minix, currently the two calls do the same thing. reboot (2), sync (8).