/* grub-mkdevicemap.c - make a device map file automatically */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2007 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <grub/util/misc.h>
#define _GNU_SOURCE 1
#include <getopt.h>
#ifdef __linux__
# if !defined(__GLIBC__) || \
((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 1)))
/* Maybe libc doesn't have large file support. */
# include <linux/unistd.h> /* _llseek */
# endif /* (GLIBC < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR < 1)) */
# include <sys/ioctl.h> /* ioctl */
# ifndef HDIO_GETGEO
# define HDIO_GETGEO 0x0301 /* get device geometry */
/* If HDIO_GETGEO is not defined, it is unlikely that hd_geometry is
defined. */
struct hd_geometry
{
unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
unsigned long start;
};
# endif /* ! HDIO_GETGEO */
# ifndef FLOPPY_MAJOR
# define FLOPPY_MAJOR 2 /* the major number for floppy */
# endif /* ! FLOPPY_MAJOR */
# ifndef MAJOR
# define MAJOR(dev) \
({ \
unsigned long long __dev = (dev); \
(unsigned) ((__dev >> 8) & 0xfff) \
| ((unsigned int) (__dev >> 32) & ~0xfff); \
})
# endif /* ! MAJOR */
# ifndef CDROM_GET_CAPABILITY
# define CDROM_GET_CAPABILITY 0x5331 /* get capabilities */
# endif /* ! CDROM_GET_CAPABILITY */
# ifndef BLKGETSIZE
# define BLKGETSIZE _IO(0x12,96) /* return device size */
# endif /* ! BLKGETSIZE */
#endif /* __linux__ */
/* Use __FreeBSD_kernel__ instead of __FreeBSD__ for compatibility with
kFreeBSD-based non-FreeBSD systems (e.g. GNU/kFreeBSD) */
#if defined(__FreeBSD__) && ! defined(__FreeBSD_kernel__)
# define __FreeBSD_kernel__
#endif
#ifdef __FreeBSD_kernel__
/* Obtain version of kFreeBSD headers */
# include <osreldate.h>
# ifndef __FreeBSD_kernel_version
# define __FreeBSD_kernel_version __FreeBSD_version
# endif
/* Runtime detection of kernel */
# include <sys/utsname.h>
int
get_kfreebsd_version (void)
{
struct utsname uts;
int major;
int minor;
int v[2];
uname (&uts);
sscanf (uts.release, "%d.%d", &major, &minor);
if (major >= 9)
major = 9;
if (major >= 5)
{
v[0] = minor/10; v[1] = minor%10;
}
else
{
v[0] = minor%10; v[1] = minor/10;
}
return major*100000+v[0]*10000+v[1]*1000;
}
#endif /* __FreeBSD_kernel__ */
#if defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__)
# include <sys/ioctl.h> /* ioctl */
# include <sys/disklabel.h>
# include <sys/cdio.h> /* CDIOCCLRDEBUG */
# if defined(__FreeBSD_kernel__)
# include <sys/param.h>
# if __FreeBSD_kernel_version >= 500040
# include <sys/disk.h>
# endif
# endif /* __FreeBSD_kernel__ */
#endif /* __FreeBSD_kernel__ || __NetBSD__ || __OpenBSD__ */
#ifdef HAVE_OPENDISK
# include <util.h>
#endif /* HAVE_OPENDISK */
#ifdef __linux__
/* Check if we have devfs support. */
static int
have_devfs (void)
{
struct stat st;
return stat ("/dev/.devfsd", &st) == 0;
}
#endif /* __linux__ */
/* These three functions are quite different among OSes. */
static void
get_floppy_disk_name (char *name, int unit)
{
#if defined(__linux__)
/* GNU/Linux */
if (have_devfs ())
sprintf (name, "/dev/floppy/%d", unit);
else
sprintf (name, "/dev/fd%d", unit);
#elif defined(__GNU__)
/* GNU/Hurd */
sprintf (name, "/dev/fd%d", unit);
#elif defined(__FreeBSD_kernel__)
/* kFreeBSD */
if (get_kfreebsd_version () >= 400000)
sprintf (name, "/dev/fd%d", unit);
else
sprintf (name, "/dev/rfd%d", unit);
#elif defined(__NetBSD__)
/* NetBSD */
/* opendisk() doesn't work for floppies. */
sprintf (name, "/dev/rfd%da", unit);
#elif defined(__OpenBSD__)
/* OpenBSD */
sprintf (name, "/dev/rfd%dc", unit);
#elif defined(__QNXNTO__)
/* QNX RTP */
sprintf (name, "/dev/fd%d", unit);
#else
# warning "BIOS floppy drives cannot be guessed in your operating system."
/* Set NAME to a bogus string. */
*name = 0;
#endif
}
static void
get_ide_disk_name (char *name, int unit)
{
#if defined(__linux__)
/* GNU/Linux */
sprintf (name, "/dev/hd%c", unit + 'a');
#elif defined(__GNU__)
/* GNU/Hurd */
sprintf (name, "/dev/hd%d", unit);
#elif defined(__FreeBSD_kernel__)
/* kFreeBSD */
if (get_kfreebsd_version () >= 400000)
sprintf (name, "/dev/ad%d", unit);
else
sprintf (name, "/dev/rwd%d", unit);
#elif defined(__NetBSD__) && defined(HAVE_OPENDISK)
/* NetBSD */
char shortname[16];
int fd;
sprintf (shortname, "wd%d", unit);
fd = opendisk (shortname, O_RDONLY, name,
16, /* length of NAME */
0 /* char device */
);
close (fd);
#elif defined(__OpenBSD__)
/* OpenBSD */
sprintf (name, "/dev/rwd%dc", unit);
#elif defined(__QNXNTO__)
/* QNX RTP */
/* Actually, QNX RTP doesn't distinguish IDE from SCSI, so this could
contain SCSI disks. */
sprintf (name, "/dev/hd%d", unit);
#else
# warning "BIOS IDE drives cannot be guessed in your operating system."
/* Set NAME to a bogus string. */
*name = 0;
#endif
}
static void
get_scsi_disk_name (char *name, int unit)
{
#if defined(__linux__)
/* GNU/Linux */
sprintf (name, "/dev/sd%c", unit + 'a');
#elif defined(__GNU__)
/* GNU/Hurd */
sprintf (name, "/dev/sd%d", unit);
#elif defined(__FreeBSD_kernel__)
/* kFreeBSD */
if (get_kfreebsd_version () >= 400000)
sprintf (name, "/dev/da%d", unit);
else
sprintf (name, "/dev/rda%d", unit);
#elif defined(__NetBSD__) && defined(HAVE_OPENDISK)
/* NetBSD */
char shortname[16];
int fd;
sprintf (shortname, "sd%d", unit);
fd = opendisk (shortname, O_RDONLY, name,
16, /* length of NAME */
0 /* char device */
);
close (fd);
#elif defined(__OpenBSD__)
/* OpenBSD */
sprintf (name, "/dev/rsd%dc", unit);
#elif defined(__QNXNTO__)
/* QNX RTP */
/* QNX RTP doesn't distinguish SCSI from IDE, so it is better to
disable the detection of SCSI disks here. */
*name = 0;
#else
# warning "BIOS SCSI drives cannot be guessed in your operating system."
/* Set NAME to a bogus string. */
*name = 0;
#endif
}
#ifdef __linux__
static void
get_dac960_disk_name (char *name, int controller, int drive)
{
sprintf (name, "/dev/rd/c%dd%d", controller, drive);
}
static void
get_ataraid_disk_name (char *name, int unit)
{
sprintf (name, "/dev/ataraid/d%c", unit + '0');
}
static void
get_i2o_disk_name (char *name, char unit)
{
sprintf (name, "/dev/i2o/hd%c", unit);
}
#endif
/* Check if DEVICE can be read. If an error occurs, return zero,
otherwise return non-zero. */
int
check_device (const char *device)
{
char buf[512];
FILE *fp;
/* If DEVICE is empty, just return 1. */
if (*device == 0)
return 1;
fp = fopen (device, "r");
if (! fp)
{
switch (errno)
{
#ifdef ENOMEDIUM
case ENOMEDIUM:
# if 0
/* At the moment, this finds only CDROMs, which can't be
read anyway, so leave it out. Code should be
reactivated if `removable disks' and CDROMs are
supported. */
/* Accept it, it may be inserted. */
return 1;
# endif
break;
#endif /* ENOMEDIUM */
default:
/* Break case and leave. */
break;
}
/* Error opening the device. */
return 0;
}
/* Make sure CD-ROMs don't get assigned a BIOS disk number
before SCSI disks! */
#ifdef __linux__
# ifdef CDROM_GET_CAPABILITY
if (ioctl (fileno (fp), CDROM_GET_CAPABILITY, 0) >= 0)
return 0;
# else /* ! CDROM_GET_CAPABILITY */
/* Check if DEVICE is a CD-ROM drive by the HDIO_GETGEO ioctl. */
{
struct hd_geometry hdg;
struct stat st;
if (fstat (fileno (fp), &st))
return 0;
/* If it is a block device and isn't a floppy, check if HDIO_GETGEO
succeeds. */
if (S_ISBLK (st.st_mode)
&& MAJOR (st.st_rdev) != FLOPPY_MAJOR
&& ioctl (fileno (fp), HDIO_GETGEO, &hdg))
return 0;
}
# endif /* ! CDROM_GET_CAPABILITY */
#endif /* __linux__ */
#if defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__)
# ifdef CDIOCCLRDEBUG
if (ioctl (fileno (fp), CDIOCCLRDEBUG, 0) >= 0)
return 0;
# endif /* CDIOCCLRDEBUG */
#endif /* __FreeBSD_kernel__ || __NetBSD__ || __OpenBSD__ */
/* Attempt to read the first sector. */
if (fread (buf, 1, 512, fp) != 512)
{
fclose (fp);
return 0;
}
fclose (fp);
return 1;
}
static void
make_device_map (const char *device_map, int floppy_disks)
{
FILE *fp;
int num_hd = 0;
int i;
if (strcmp (device_map, "-") == 0)
fp = stdout;
else
fp = fopen (device_map, "w");
if (! fp)
grub_util_error ("cannot open %s", device_map);
/* Floppies. */
for (i = 0; i < floppy_disks; i++)
{
char name[16];
struct stat st;
get_floppy_disk_name (name, i);
if (stat (name, &st) < 0)
break;
/* In floppies, write the map, whether check_device succeeds
or not, because the user just may not insert floppies. */
if (fp)
fprintf (fp, "(fd%d)\t%s\n", i, name);
}
#ifdef __linux__
if (have_devfs ())
{
while (1)
{
char discn[32];
char name[PATH_MAX];
struct stat st;
/* Linux creates symlinks "/dev/discs/discN" for convenience.
The way to number disks is the same as GRUB's. */
sprintf (discn, "/dev/discs/disc%d", num_hd);
if (stat (discn, &st) < 0)
break;
if (realpath (discn, name))
{
char *p;
strcat (name, "/disc");
p = grub_util_get_disk_name (num_hd, name);
fprintf (fp, "(%s)\t%s\n", p, name);
free (p);
}
num_hd++;
}
goto finish;
}
#endif /* __linux__ */
/* IDE disks. */
for (i = 0; i < 20; i++)
{
char name[16];
get_ide_disk_name (name, i);
if (check_device (name))
{
char *p;
p = grub_util_get_disk_name (num_hd, name);
fprintf (fp, "(%s)\t%s\n", p, name);
free (p);
num_hd++;
}
}
#ifdef __linux__
/* ATARAID disks. */
for (i = 0; i < 8; i++)
{
char name[20];
get_ataraid_disk_name (name, i);
if (check_device (name))
{
char *p;
p = grub_util_get_disk_name (num_hd, name);
fprintf (fp, "(%s)\t%s\n", p, name);
free (p);
num_hd++;
}
}
#endif /* __linux__ */
/* The rest is SCSI disks. */
for (i = 0; i < 16; i++)
{
char name[16];
get_scsi_disk_name (name, i);
if (check_device (name))
{
char *p;
p = grub_util_get_disk_name (num_hd, name);
fprintf (fp, "(%s)\t%s\n", p, name);
free (p);
num_hd++;
}
}
#ifdef __linux__
/* This is for DAC960 - we have
/dev/rd/c<controller>d<logical drive>p<partition>.
DAC960 driver currently supports up to 8 controllers, 32 logical
drives, and 7 partitions. */
{
int controller, drive;
for (controller = 0; controller < 8; controller++)
{
for (drive = 0; drive < 15; drive++)
{
char name[24];
get_dac960_disk_name (name, controller, drive);
if (check_device (name))
{
char *p;
p = grub_util_get_disk_name (num_hd, name);
fprintf (fp, "(%s)\t%s\n", p, name);
free (p);
num_hd++;
}
}
}
}
/* This is for I2O - we have /dev/i2o/hd<logical drive><partition> */
{
char unit;
for (unit = 'a'; unit < 'f'; unit++)
{
char name[24];
get_i2o_disk_name (name, unit);
if (check_device (name))
{
char *p;
p = grub_util_get_disk_name (num_hd, name);
fprintf (fp, "(%s)\t%s\n", p, name);
free (p);
num_hd++;
}
}
}
#endif /* __linux__ */
finish:
if (fp != stdout)
fclose (fp);
}
static struct option options[] =
{
{"device-map", required_argument, 0, 'm'},
{"probe-second-floppy", no_argument, 0, 's'},
{"no-floppy", no_argument, 0, 'n'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"verbose", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
static void
usage (int status)
{
if (status)
fprintf (stderr,
"Try ``grub-mkdevicemap --help'' for more information.\n");
else
printf ("\
Usage: grub-mkdevicemap [OPTION]...\n\
\n\
Generate a device map file automatically.\n\
\n\
-n, --no-floppy do not probe any floppy drive\n\
-s, --probe-second-floppy probe the second floppy drive\n\
-m, --device-map=FILE use FILE as the device map [default=%s]\n\
-h, --help display this message and exit\n\
-V, --version print version information and exit\n\
-v, --verbose print verbose messages\n\
\n\
Report bugs to <%s>.\n\
",
DEFAULT_DEVICE_MAP, PACKAGE_BUGREPORT);
exit (status);
}
int
main (int argc, char *argv[])
{
char *dev_map = 0;
int floppy_disks = 1;
progname = "grub-mkdevicemap";
/* Check for options. */
while (1)
{
int c = getopt_long (argc, argv, "snm:r:hVv", options, 0);
if (c == -1)
break;
else
switch (c)
{
case 'm':
if (dev_map)
free (dev_map);
dev_map = xstrdup (optarg);
break;
case 'n':
floppy_disks = 0;
break;
case 's':
floppy_disks = 2;
break;
case 'h':
usage (0);
break;
case 'V':
printf ("%s (%s) %s\n", progname, PACKAGE_NAME, PACKAGE_VERSION);
return 0;
case 'v':
verbosity++;
break;
default:
usage (1);
break;
}
}
make_device_map (dev_map ? : DEFAULT_DEVICE_MAP, floppy_disks);
free (dev_map);
return 0;
}