[2386] in linux-scsi channel archive
Re: ZIP autoeject?
daemon@ATHENA.MIT.EDU (Gerd Knorr)
Fri Aug 29 15:50:44 1997
Date: Fri, 29 Aug 1997 19:53:11 +0200
From: Gerd Knorr <kraxel@goldbach.isdn.cs.tu-berlin.de>
To: linux-scsi@vger.rutgers.edu
In-Reply-To: <19970829113018.15835@beijing.itri.loyola.edu>
In article <19970829113018.15835@beijing.itri.loyola.edu>, you wrote:
>Iomega reccommends that zip disks be ejected before the machine is shut
>down, and their latest windows software does this automatically. I'd
>like to know if there's a way to get this effect using linux. I took a
>look at the 'eject' utility, but it only seems to support cdroms. Is
>there a similar utility for zip drives (or removable scsi drives in
>general)? Or, (perhaps better) a flag to autoeject on umount? If there
>isn't a utility, is there a kernel function I could use to write such a
>utility?
Here comes one. What it does depends on the name of the executeable.
It sends scsi commands via ioctl to the kernel, bypassing all
sanity-checks (you can eject mounted media), so be careful. Stick this
somewhere (well, best after umount -a) into your shutdown sequence.
Gerd
---------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "scsi/scsi.h"
#include "scsi/scsi_ioctl.h"
#define DEFAULT_DEVICE "/dev/sda"
extern char *sys_errlist[];
typedef struct scsi_ioctl_command {
unsigned int inlen;
unsigned int outlen;
unsigned char data[0];
} Scsi_Ioctl_Command;
void
main(int argc, char *argv[])
{
int fd,val;
char *prog, device[256], request[256], *h;
Scsi_Ioctl_Command *sic = (Scsi_Ioctl_Command*)request;
h = strchr(argv[0],'/');
prog = h ? h+1 : argv[0];
if (0 == strcmp(prog,"eject") || 0 == strcmp(prog,"unload"))
val=2;
else if (0 == strcmp(prog,"close") || 0 == strcmp(prog,"load"))
val=3;
else if (0 == strcmp(prog,"spindown"))
val=0;
else if (0 == strcmp(prog,"spinup"))
val=1;
else {
fprintf(stderr,"undefined: %s\n",prog);
exit(1);
}
if (argc > 1) {
strcpy(device,argv[1]);
} else {
strcpy(device,DEFAULT_DEVICE);
}
if (-1 == (fd = open(device, O_RDONLY))) {
fprintf(stderr,"%s: can't open %s: %s\n",prog,device,
sys_errlist[errno]);
exit(1);
}
if (-1 == ioctl(fd,SCSI_IOCTL_DOORUNLOCK,sic)) {
perror("ioctl (unlock)");
exit(1);
}
memset(request,0,256);
sic->inlen = 0;
sic->outlen = 0;
sic->data[0] = START_STOP;
sic->data[1] = 0;
sic->data[2] = 0;
sic->data[3] = 0;
sic->data[4] = val;
sic->data[5] = 0;
if (-1 == ioctl(fd,SCSI_IOCTL_SEND_COMMAND,sic)) {
perror("ioctl (eject)");
exit(1);
}
close(fd);
exit(0);
}
