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-rw-r--r--man2/getpriority.28
1 files changed, 7 insertions, 1 deletions
diff --git a/man2/getpriority.2 b/man2/getpriority.2
index 8f9754ffd0..4a1ff91a9d 100644
--- a/man2/getpriority.2
+++ b/man2/getpriority.2
@@ -118,7 +118,13 @@ soft limit; see
.BR getrlimit (2)
for details.
.SH RETURN VALUE
-Since
+On success,
+.BR getpriority ()
+returns the calling thread's nice value, which may be a negative number.
+On error, it returns \-1 and sets
+.I errno
+to indicate the cause of the error.
+Since a successful call to
.BR getpriority ()
can legitimately return the value \-1, it is necessary
to clear the external variable