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#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "sg_include.h"
/* Test code for D. Gilbert's extensions to the Linux OS SCSI generic ("sg")
device driver.
* Copyright (C) 1999-2002 D. Gilbert
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
This program send either device, bus or host resets to device,
or bus or host associated with the given sg device.
Version 0.52 (20020126)
*/
#ifndef SG_SCSI_RESET
#define SG_SCSI_RESET 0x2284
#endif
#ifndef SG_SCSI_RESET_NOTHING
#define SG_SCSI_RESET_NOTHING 0
#define SG_SCSI_RESET_DEVICE 1
#define SG_SCSI_RESET_BUS 2
#define SG_SCSI_RESET_HOST 3
#endif
int main(int argc, char * argv[])
{
int sg_fd, res, k;
int do_device_reset = 0;
int do_bus_reset = 0;
int do_host_reset = 0;
char * file_name = 0;
for (k = 1; k < argc; ++k) {
if (0 == strcmp("-d", argv[k]))
do_device_reset = 1;
else if (0 == strcmp("-b", argv[k]))
do_bus_reset = 1;
else if (0 == strcmp("-h", argv[k]))
do_host_reset = 1;
else if (*argv[k] == '-') {
printf("Unrecognized switch: %s\n", argv[k]);
file_name = 0;
break;
}
else
file_name = argv[k];
}
if (0 == file_name) {
printf(
"Usage: 'sg_reset [-d] [-b] [-h] <generic_device>'\n");
printf(" where: -d attempt a SCSI device reset\n");
printf(" -b attempt a SCSI bus reset\n");
printf(" -h attempt a host adapter reset\n");
printf(" {if no switch given then check if reset underway}\n");
return 1;
}
sg_fd = open(file_name, O_RDWR | O_NONBLOCK);
if (sg_fd < 0) {
perror("sg_reset: open error");
return 1;
}
k = SG_SCSI_RESET_NOTHING;
if (do_device_reset) {
printf("sg_reset: starting device reset\n");
k = SG_SCSI_RESET_DEVICE;
}
else if (do_bus_reset) {
printf("sg_reset: starting bus reset\n");
k = SG_SCSI_RESET_BUS;
}
else if (do_host_reset) {
printf("sg_reset: starting host reset\n");
k = SG_SCSI_RESET_HOST;
}
res = ioctl(sg_fd, SG_SCSI_RESET, &k);
if (res < 0) {
if (EBUSY == errno)
printf("sg_reset: BUSY, may be resetting now\n");
else if (EIO == errno)
printf("sg_reset: requested type of reset may not be available\n");
else if (EACCES == errno)
printf("sg_reset: reset requires CAP_SYS_ADMIN (root) "
"permission\n");
else if (EINVAL == errno)
printf("sg_reset: SG_SCSI_RESET not supported\n");
else if (EIO == errno)
printf("sg_reset: scsi_reset_provider() call failed\n");
else
perror("sg_reset: SG_SCSI_RESET failed");
return 1;
}
if (SG_SCSI_RESET_NOTHING == k)
printf("sg_reset: did nothing, device is normal mode\n");
else if (SG_SCSI_RESET_DEVICE == k)
printf("sg_reset: completed device reset\n");
else if (SG_SCSI_RESET_BUS == k)
printf("sg_reset: completed bus reset\n");
else if (SG_SCSI_RESET_HOST == k)
printf("sg_reset: completed host reset\n");
if (close(sg_fd) < 0) {
perror("sg_reset: close error");
return 1;
}
return 0;
}
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