@@ -129,6 +129,11 @@ or
.BR free (3).)
.SH ERRORS
.TP
+.B EAGAIN
+The service was temporarily unavailable; try again later.
+For NSS backends in glibc this indicates a temporary error talking to the backend.
+The error may correct itself, retrying later is suggested.
+.TP
.B EINTR
A signal was caught.
.TP
@@ -141,6 +146,11 @@ The calling process already has too many open files.
.B ENFILE
Too many open files in the system.
.TP
+.\" not in POSIX
+.B ENOENT
+A necessary input file cannot be found.
+For NSS backends in glibc this indicates the backend is not correctly configured.
+.TP
.B ENOMEM
.\" not in POSIX
Insufficient memory to allocate