Date: Sat, 6 Dec 1997 03:28:09 -0800 (PST) From: Bruce Evans <bde@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/sys errno.h Message-ID: <199712061128.DAA01254@freefall.freebsd.org>
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bde 1997/12/06 03:28:09 PST
Modified files:
sys/sys errno.h
Log:
Added a kernel-only error code ENOICTL. This will be returned from
low level ioctl routines instead of the magic number -1 so that
callers can distinguish it from ERESTART (which happens to be -1).
-1 meant that the ioctl was not handled at the called level.
ERESTART is normal when a sleeping ioctl is interrupted. ERESTART
got converted to ENOTTY instead of restarting the ioctl. Many
(most?) ioctls can not be restarted safely, but this is apparently
supposed to be handled by drivers converting ERESTART to EINTR.
I first saw this problem for TIOCDRAIN. Justin saw if for disk
ioctls.
Added missing parentheses.
Revision Changes Path
1.8 +4 -3 src/sys/sys/errno.h
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