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-rw-r--r--ufs-utils/dlabel.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/ufs-utils/dlabel.c b/ufs-utils/dlabel.c
new file mode 100644
index 00000000..dbae0457
--- /dev/null
+++ b/ufs-utils/dlabel.c
@@ -0,0 +1,81 @@
+/* Get the disklabel from a device node
+
+ Copyright (C) 1996 Free Software Foundation, Inc.
+
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+ 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 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 this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <errno.h>
+#include <hurd.h>
+#include <mach.h>
+#include <string.h>
+#include <device/device.h>
+#include <mach/sa/sys/ioctl.h> /* Ick */
+#include <device/disk_status.h>
+
+static error_t
+fd_get_device (int fd, device_t *device)
+{
+ error_t err;
+ string_t name;
+ int class, flags = 0;
+ size_t block_size;
+ off_t *runs = 0;
+ char *misc = 0;
+ size_t runs_len = 0, misc_len = 0;
+ file_t node = getdport (fd);
+
+ if (node == MACH_PORT_NULL)
+ return errno;
+
+ err = file_get_storage_info (node, &class, &runs, &runs_len, &block_size,
+ name, device, &misc, &misc_len, &flags);
+ if (!err)
+ {
+ if (runs_len != 2 || runs[0] != 0 || class != STORAGE_DEVICE)
+ /* This doesn't seem to be a handle on the whole device; be picky. */
+ err = ENODEV;
+ if (runs_len)
+ vm_deallocate (mach_task_self (), (vm_address_t)runs, runs_len);
+ if (misc_len)
+ vm_deallocate (mach_task_self (), (vm_address_t)misc, misc_len);
+ }
+
+ mach_port_deallocate (mach_task_self (), node);
+
+ return err;
+}
+
+error_t
+fd_get_disklabel (int fd, struct disklabel *label)
+{
+ device_t device;
+ error_t err = fd_get_device (fd, &device);
+
+ if (! err)
+ {
+ mach_msg_type_number_t label_len = sizeof *label / sizeof (integer_t);
+
+ err = device_get_status (device, DIOCGDINFO,
+ (dev_status_t)label, &label_len);
+ if (!err && label_len != sizeof *label / sizeof (integer_t))
+ err = ERANGE;
+
+ mach_port_deallocate (mach_task_self (), device);
+ }
+
+ return err;
+}