From fc3275c8a9ee7b4a3527b369a3e271d93c7107d8 Mon Sep 17 00:00:00 2001
From: dds <dds@FreeBSD.org>
Date: Sat, 30 Aug 2003 07:59:05 +0000
Subject: Document that read(2) can also return EPERM

See e.g. nfsclient/nfs_vnops.c

static int
nfs_read(struct vop_read_args *ap)
{
        struct vnode *vp = ap->a_vp;

        if (vp->v_type != VREG)
                return (EPERM);
        return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
}

Approved by:	schweikh (mentor)
MFC after:	6 weeks
---
 lib/libc/sys/read.2 | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/libc')

diff --git a/lib/libc/sys/read.2 b/lib/libc/sys/read.2
index 2271141..badf49f 100644
--- a/lib/libc/sys/read.2
+++ b/lib/libc/sys/read.2
@@ -163,6 +163,9 @@ was negative.
 .It Bq Er EAGAIN
 The file was marked for non-blocking I/O,
 and no data were ready to be read.
+.It Bq Er EPERM
+The file descriptor is associated with a non regular file
+(e.g. a directory) mounted over NFS.
 .El
 .Pp
 In addition,
-- 
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