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authorMiles Bader <miles@gnu.org>1997-08-11 16:00:46 +0000
committerMiles Bader <miles@gnu.org>1997-08-11 16:00:46 +0000
commit949bb413bb8aad6eadc39a2da36fa3cafd62cd89 (patch)
tree067f9e1a9c757e40871a8f88ca7878d91f775e47 /libdiskfs/filedev.c
parent06e02f0071c42ca4c19110f5f73c22cfd6a1c154 (diff)
No long used
Diffstat (limited to 'libdiskfs/filedev.c')
-rw-r--r--libdiskfs/filedev.c135
1 files changed, 0 insertions, 135 deletions
diff --git a/libdiskfs/filedev.c b/libdiskfs/filedev.c
deleted file mode 100644
index d7ee7030..00000000
--- a/libdiskfs/filedev.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/* Get the mach device underlying a file
-
- Copyright (C) 1995, 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 <sys/fcntl.h>
-
-#include <device/device.h>
-
-#include "priv.h"
-
-/* Returns the name and a send right for the mach device on which the file
- NAME is stored, and returns it in DEV_NAME (which is malloced) and PORT.
- Other values returned are START, the first valid offset, SIZE, the the
- number of blocks after START, and BLOCK_SIZE, the units in which the
- device is addressed.
-
- The device is opened for reading, and if the diskfs global variable
- DISKFS_READONLY is false, writing. */
-error_t
-diskfs_get_file_device (char *name,
- char **dev_name, mach_port_t *port,
- off_t *start, off_t *size, size_t *block_size)
-{
- int i;
- error_t err;
- mach_msg_type_number_t data_len = 100;
- mach_msg_type_number_t num_ints = 10, num_ports = 10, num_offsets = 10;
- int _ints[num_ints], *ints = _ints;
- mach_port_t _ports[num_ports], *ports = _ports;
- off_t _offsets[num_offsets], *offsets = _offsets;
- char _data[data_len], *data = _data;
- file_t node =
- file_name_lookup (name, diskfs_readonly ? O_RDONLY : O_RDWR, 0);
-
- if (node == MACH_PORT_NULL)
- return errno;
-
- *port = MACH_PORT_NULL;
-
- err = file_get_storage_info (node, &ports, &num_ports, &ints, &num_ints,
- &offsets, &num_offsets, &data, &data_len);
- if (err)
- return err;
-
- /* See <hurd/store.h> for an explanation of what's in the vectors returned
- by file_get_storage_info. */
-
- if (num_ints < 6)
- err = EGRATUITOUS;
- else if (ints[0] != STORAGE_DEVICE)
- err = ENODEV;
-
- if (!err && block_size)
- *block_size = ints[2];
-
- if (!err && (start || size))
- /* Extract the device block addresses. */
- {
- size_t num_runs = ints[3];
- if (num_runs != 1)
- /* We can't handle anything but a contiguous set of blocks. */
- err = ENODEV; /* XXX */
- else
- {
- if (start)
- *start = offsets[0];
- if (size)
- *size = offsets[1];
- }
- }
-
- if (!err && dev_name)
- /* Extract the device name into DEV_NAME. */
- {
- size_t name_len = ints[4];
- if (data && name_len > 0)
- if (data_len < name_len)
- err = EGRATUITOUS;
- else
- {
- *dev_name = malloc (name_len);
- if (*dev_name)
- strcpy (*dev_name, data);
- else
- err = ENOMEM;
- }
- }
-
- if (!err && port)
- /* Extract the device port. */
- if (num_ports != 1)
- err = EGRATUITOUS;
- else
- *port = ports[0];
-
- /* Deallocate things we don't care about or that we've made copies of. */
- for (i = (err || !port) ? 0 : 1; i < num_ports; i++)
- if (MACH_PORT_VALID (ports[i]))
- mach_port_deallocate (mach_task_self (), ports[i]);
-
-#define DISCARD_MEM(v, vl, b) \
- if (v != b) \
- vm_deallocate (mach_task_self (), (vm_address_t)v, vl * sizeof *v);
- DISCARD_MEM (ports, num_ports, _ports);
- DISCARD_MEM (ints, num_ints, _ints);
- DISCARD_MEM (offsets, num_offsets, _offsets);
- DISCARD_MEM (data, data_len, _data);
-
- /* Note that we don't deallocate NODE unless we're returning an error,
- which should prevent the information returned by file_get_storage_info
- from changing. */
-
- if (err)
- /* We got an error, deallocate everything. */
- mach_port_deallocate (mach_task_self (), node);
-
- return err;
-}