Use the ".Rv" mdoc(7) macro where appropriate.

Reviewed by:	ru

lib/libc/gen/lockf.3

@@ -179,12 +179,8 @@ locks may be safely used concurrently.
 .Pp
 Blocking on a section is interrupted by any signal.
 .Sh RETURN VALUES
-If successful, the
-.Fn lockf
-function returns 0.
-Otherwise, it returns -1, sets
-.Dv errno
-to indicate an error, and existing locks are not changed.
+.Rv -std lockf
+In the case of a failure, existing locks are not changed.
 .Sh ERRORS
 .Fn lockf
 will fail if:

lib/libc/gen/siginterrupt.3

@@ -99,8 +99,16 @@ system call that is not available in
 .Bx 4.2 ,
 hence it should not be used if backward compatibility is needed.
 .Sh RETURN VALUES
-A 0 value indicates that the call succeeded.
-A \-1 value indicates that an invalid signal number has been supplied.
+.Rv -std siginterrupt
+.Sh ERRORS
+The
+.Fn siginterrupt
+call fails if:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+.Fa sig
+is not a valid signal number.
+.El
 .Sh SEE ALSO
 .Xr sigaction 2 ,
 .Xr sigblock 2 ,

lib/libc/posix1e/cap_set_flag.3

@@ -59,13 +59,10 @@ Implementations may place restrictions on the setting of the flags in a capabili
 support for POSIX.1e interfaces and features is still under
 development at this time.
 .Sh RETURN VALUES
-Upon successful completion, this function shall return a value of zero.
-Otherwise, a value of -1 shall be returned, and
-.Ar errno
-shall be set to indicate the error.
+.Rv -std cap_set_flag
 The capability state identified by
 .Ar cap_p
-shall not be affected if the return value is -1.
+shall not be affected if the function fails.
 .Sh ERRORS
 If any of the following conditions occur, the
 .Fn cap_set_flag

lib/libc/posix1e/cap_set_proc.3

@@ -60,14 +60,11 @@ remain unchanged.
 support for POSIX.1e interfaces and features is still under
 development at this time.
 .Sh RETURN VALUES
-Upon successful completion, this function shall return a value of zero.
-Otherwise, a value of -1 shall be returned and
-.Ar errno
-shall be set to indicate the error.
+.Rv -std cap_set_proc
 Neither the state represented in the object identified by
 .Ar cap_p
 nor the capability state of the calling process shall be affected if the
-return value is -1.
+function fails.
 .Sh ERRORS
 If any of the following conditions occur, the
 .Fn cap_set_proc

lib/libc/sys/mincore.2

@@ -57,14 +57,7 @@ in the character array
 with a value of 1 meaning
 that the page is in-core.
 .Sh RETURN VALUES
-Upon successful completion,
-.Fn mincore
-returns 0 and
-.Fa vec
-is updated to reflect the page status.  Otherwise a value of -1
-is returned and
-.Va errno
-is set to indicate the error.
+.Rv -std mincore
 .Sh ERRORS
 .Bl -tag -width Er
 .It Bq Er EINVAL

lib/libc/sys/profil.2

@@ -91,19 +91,7 @@ A
 .Fa scale
 value of 0 disables profiling.
 .Sh RETURN VALUES
-If the
-.Fa scale
-value is nonzero and the buffer
-.Fa samples
-contains an illegal address,
-.Fn profil
-returns \-1,
-profiling is terminated and
-.Va errno
-is set appropriately.
-Otherwise
-.Fn profil
-returns 0.
+.Rv -std profil
 .Sh FILES
 .Bl -tag -width /usr/lib/gcrt0.o -compact
 .It Pa /usr/lib/gcrt0.o