Symbol: FRSYNC
sys/kern/vfs_vnops.c
657
if ((fflag & (FFSYNC | FRSYNC)) == (FFSYNC | FRSYNC))
sys/sys/fcntl.h
154
#define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK|FDSYNC|FRSYNC|FALTIO|\