.LP
More precisely, if
.I op
-is O_SYNC, then all currently queued I/O operations shall be
+is
+.BR O_SYNC ,
+then all currently queued I/O operations shall be
completed as if by a call of
.BR fsync (2),
and if
.I op
-is O_DSYNC, this call is the asynchronous analog of
+is
+.BR O_DSYNC ,
+this call is the asynchronous analog of
.BR fdatasync (2).
Note that this is a request only \(em this call does not wait
for I/O completion.
.B EINVAL
No synchronized I/O for this file is supported, or
.I op
-is not O_SYNC or O_DSYNC.
+is not
+.B O_SYNC
+or
+.BR O_DSYNC .
.SH "CONFORMING TO"
POSIX.1-2001
.SH "SEE ALSO"