EMILE/libemile/emile_scsi_get_dev.c

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2004-12-21 17:34:30 +00:00
static __attribute__((used)) char* rcsid = "$CVSHeader$";
/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include "libemile.h"
#define MAJOR_SD 8 /* SCSI disks */
int emile_scsi_get_dev(char* dev_name, int fd)
{
struct stat st;
int ret;
int dev;
int major;
int minor;
ret = fstat(fd, &st);
if (ret == -1)
return -1;
dev = S_ISREG(st.st_mode) ? st.st_dev : st.st_rdev;
major = (dev >> 8) & 0x0F; /* major number = driver id */
minor = dev & 0xFF; /* minor number = disk id */
switch(major)
{
case MAJOR_SD: /* SCSI disks */
sprintf(dev_name, "/dev/sd%c%d", 'a' + (minor >> 4),
minor & 0x0F);
break;
default:
fprintf(stderr, "Unknown device major number %d\n", major);
return -1;
}
return 0;
}