Date: Wed, 27 Oct 1999 16:52:28 -0700 (PDT) From: "Ronald F. Guilmette" <rfg@monkeys.com> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/14561: ioctl (fd, CDIOCEJECT, (void*) 0) doesn't work, even on SCSI CD drives Message-ID: <199910272352.QAA63935@monkeys.com>
next in thread | raw e-mail | index | archive | help
>Number: 14561
>Category: kern
>Synopsis: ioctl (fd, CDIOCEJECT, (void*) 0) doesn't work
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Oct 27 17:00:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator: Ronald F. Guilmette
>Release: FreeBSD 3.3-RELEASE i386
>Organization:
E-Scrub Technologies, Inc.
>Environment:
>Description:
Calling ioctl (fd, CDIOCEJECT, (void*) 0) from within a C program
for an `fd' value which is an open file descriptor for a SCSI CDROM
drive that *does* have eject capabilities and that *does* currently
contain a loaded CD fails to cause the drive to perform the eject
operation, and the call returns with a negative (-1?) result and
with ERRNO set to the mysterious and uninformative value of `EIO'
(``Input/output error'').
>How-To-Repeat:
Compile and run the following trivial program giving it "/dev/cd0c"
as its one and only command line argument. Execute the program
_only_ on a system with a SCSI CDROM drive that has programmed
ejection capability, and only when there is already a CD loaded
in the drive. (I also tried specifying "/dev/rcd0c" and also
"/dev/cd0a" and even "/dev/rcd0a" and none of these worked any
better.)
--------------------------------------------------------------------
/* eject.c - program for FreeBSD to eject a CD */
/* Usage:
eject [device]
*/
/* Copyright (c) 1999 Ronald F. Guilmette; all rights reserved. */
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/cdio.h>
static char const *pname;
int
main (register int const argc, register char const **argv)
{
register int ifd;
register char const *filename;
pname = strrchr (argv[0], '/');
pname = pname ? pname + 1 : argv[0];
filename = argv[1];
if ((ifd = open (filename, O_RDONLY)) == -1)
{
fprintf (stderr, "%s: Error opening `%s': %s\n",
pname, filename, strerror (errno));
return 1;
}
if (ioctl (ifd, CDIOCEJECT, (void*) 0) == -1)
{
fprintf (stderr, "%s: Error opening `%s': %s\n",
pname, filename, strerror (errno));
return 1;
}
close (ifd);
return 0;
}
--------------------------------------------------------------------
>Fix:
Manually eject the CD. (Difficult, if you are not physically adjacent
to it.)
>Release-Note:
>Audit-Trail:
>Unformatted:
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199910272352.QAA63935>