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From: ralfw@hpbbi4.BBN.HP.COM (#Ralf Wiegert)
Newsgroups: comp.sys.hp
Subject: Re: HP 9000/835, HP-UX 7.0 - unable to use cartridge tape drive
Message-ID: <1720014@hpbbi4.BBN.HP.COM>
Date: 16 Jan 91 08:34:09 GMT
References: <RENGA.91Jan12160253@perpetua.cs.uoregon.edu>
Organization: Hewlett-Packard GmbH, Germany
Lines: 60

>	/dev/rct/c0d0s2
>	tcio(1004): cannot access tape /dev/rct/c0d0s2%; errno 2
>
>	/dev/rct/c6d0s2
>	tcio(1004): cannot access tape /dev/rct/c6d0s2; errno 6
>
>	/dev/rct/c1000d0s2
>	tcio(1004): cannot access tape /dev/rct/c1000d0s2; errno 19
>
>I don't have a clue as to what these error numbers mean.

The error numbers can be found in /usr/include/sys/errno.h, I have
included a script that gives you the error name for a given errno.

#define ENOENT          2       /* No such file or directory    */
#define ENXIO           6       /* No such device or address    */
#define ENODEV          19      /* No such device               */

For the given error names (e.g. ENOENT) you can than have a look in
the errno(2) man page (man 2 errno):

ENOENT         No such file or directory.  This error occurs
               when a file name is specified and the file
               should exist but doesn't, or when one of the
               directories in a path name does not exist.
               It also occurs with msgget, semget, shmget
               when key does not refer to any object and the
               IPC_CREAT flag is not set.
ENXIO          No such device or address.  I/O on a special
               file refers to a subdevice which does not
               exist, or beyond the limits of the device.
               It may also occur when, for example, a tape
               drive is not online or no disk pack is loaded
               on a drive.
ENODEV         No such device.  An attempt was made to apply
               an inappropriate system call to a device;
               e.g., read a write-only device.


This is no official HP answer.

Hope this help, Ralf Wiegert, HP Boeblingen, Germany

#echo "errno	@(#)revision 1.0"
# ======================================================================
# ==================== script documentation ============================
# desc	Full pathname : /usr/gmbh/bin/errno
# desc	This script returns the error description for a given errno
# desc	
#
# ----------------------------------------------------------------------
# hist	1.0	900220                                      Ralf Wiegert
# hist
# ====================== end of documentation ==========================
if [ $# -ne 1 ]
then
	echo "Usage: $0 number" >&2
	exit 1
fi
awk '/^#define/ { if ($3 == '"$1"') print }' /usr/include/sys/errno.h