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-rw-r--r--lib/libc/sys/dup.24
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/libc/sys/dup.2 b/lib/libc/sys/dup.2
index 10cbc79..f4da9f5 100644
--- a/lib/libc/sys/dup.2
+++ b/lib/libc/sys/dup.2
@@ -130,9 +130,11 @@ and
system calls fail if:
.Bl -tag -width Er
.It Bq Er EBADF
-.Fa Oldd
+The
+.Fa oldd
or
.Fa newd
+argument
is not a valid active descriptor
.It Bq Er EMFILE
Too many descriptors are active.
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