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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include "sg_include.h"
/* Test code for D. Gilbert's extensions to the Linux OS SCSI generic ("sg")
device driver.
* Copyright (C) 1999 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 outputs debug information to the console/log for _all_
active sg devices.
Version 3.55 (20020115)
*/
#define EBUFF_SZ 256
int main(int argc, char * argv[])
{
int fd, res, debug, t;
char ebuff[EBUFF_SZ];
if ((argc != 2) || ('-' == *argv[1])) {
printf("Usage: sg_debug <sg_device>\n");
return 1;
}
fd = open(argv[1], O_RDONLY | O_NONBLOCK);
if (fd < 0) {
if (EBUSY == errno)
printf("Failed trying to open %s because it is busy\n", argv[1]);
else {
snprintf(ebuff, EBUFF_SZ, "sg_debug: Error trying to open %s ",
argv[1]);
perror(ebuff);
}
return 1;
}
res = ioctl(fd, SG_GET_VERSION_NUM, &t);
if ((res >= 0) || (t >= 30000)) {
printf("System is using sg version 3 driver. Hence the user can");
printf(" execute:\n 'cat /proc/scsi/sg/debug' themselves. ");
printf("Here is an example:\n");
system("cat /proc/scsi/sg/debug");
return 0;
}
debug = 10;
res = ioctl(fd, SG_SET_DEBUG, &debug);
if (res < 0) {
perror("sg_debug: ioctl error on SG_SET_DEBUG");
return 1;
}
res = close(fd);
if (res < 0) {
snprintf(ebuff, EBUFF_SZ, "sg_debug: trying to close %s ", argv[1]);
perror(ebuff);
return 1;
}
return 0;
}
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