diff options
Diffstat (limited to 'lib/libc/gen/sem_wait.3')
| -rw-r--r-- | lib/libc/gen/sem_wait.3 | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/libc/gen/sem_wait.3 b/lib/libc/gen/sem_wait.3 index 1307aabdabbcd..b6c3b7c798ce4 100644 --- a/lib/libc/gen/sem_wait.3 +++ b/lib/libc/gen/sem_wait.3 @@ -26,6 +26,7 @@ .\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .\" $FreeBSD$ +.\" .Dd February 15, 2000 .Dt SEM_WAIT 3 .Os @@ -54,7 +55,8 @@ The .Fn sem_trywait function decrements (locks) the semaphore pointed to by .Fa sem -only if the value is non-zero. Otherwise, the semaphore is not decremented and +only if the value is non-zero. +Otherwise, the semaphore is not decremented and an error is returned. .Sh RETURN VALUES .Rv -std @@ -66,7 +68,9 @@ and functions will fail if: .Bl -tag -width Er .It Bq Er EINVAL +The .Fa sem +argument points to an invalid semaphore. .El .Pp |