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systemd-stable/udev-remove.c
kay.sievers@vrfy.org 50e5de03d1 [PATCH] udev - create all partitions of blockdevice
Here is the first try to create all partitons of a blockdevice, since
removable media devices may need to acces the expected partition to
revalidate the media.

It uses the attribute syntax introduced with the last %s{file} patch.
I'm using this with my multi-slot-flash-card-reader:

  SYSFS{model}="USB Storage-SMC ", NAME{all_partitions}="smartmedia"
  SYSFS{model}="USB Storage-CFC ", NAME{all_partitions}="compactflash"
  SYSFS{model}="USB Storage-MSC ", NAME{all_partitions}="memorystick"
  SYSFS{model}="USB Storage-MMC ", NAME{all_partitions}="multimedia"

and I get:

  tree /udev/
  /udev/
  |-- memorystick
  |-- memorystick1
  |-- memorystick10
  |-- memorystick11
  |-- memorystick12
  |-- memorystick13
  |-- memorystick14
  |-- memorystick15
  |-- memorystick2
  |-- memorystick3
  |-- memorystick4
  |-- memorystick5
  |-- memorystick6
  |-- memorystick7
  |-- memorystick8
  |-- memorystick9
  |-- multimedia
  |-- multimedia1
  |-- multimedia10
  |-- multimedia11
  |-- multimedia12
  |-- multimedia13
  |-- multimedia14
  |-- multimedia15
  |-- multimedia2
  |-- multimedia3
  |-- multimedia4
  |-- multimedia5
  |-- multimedia6
  |-- multimedia7
  |-- multimedia8
  |-- multimedia9
  ...


If needed, we can make the number of partions to create
adjustable with the attribute?
2005-04-26 21:32:28 -07:00

155 lines
3.5 KiB
C

/*
* udev-remove.c
*
* Userspace devfs
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
*
*
* 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 version 2 of the License.
*
* 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 <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "udev.h"
#include "udev_version.h"
#include "udev_dbus.h"
#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
static int delete_path(char *path)
{
char *pos;
int retval;
pos = strrchr(path, '/');
while (1) {
*pos = '\0';
pos = strrchr(path, '/');
/* don't remove the last one */
if ((pos == path) || (pos == NULL))
break;
/* remove if empty */
retval = rmdir(path);
if (retval) {
if (errno == ENOTEMPTY)
return 0;
dbg("rmdir(%s) failed with error '%s'",
path, strerror(errno));
break;
}
dbg("removed '%s'", path);
}
return 0;
}
static int delete_node(struct udevice *dev)
{
char filename[255];
char partitionname[255];
char *symlinks;
char *linkname;
int retval;
int i;
strncpy(filename, udev_root, sizeof(filename));
strncat(filename, dev->name, sizeof(filename));
info("removing device node '%s'", filename);
retval = unlink(filename);
if (retval) {
dbg("unlink(%s) failed with error '%s'",
filename, strerror(errno));
return retval;
}
/* remove partition nodes */
if (dev->partitions > 0) {
info("removing partitions '%s[1-%i]'", filename, dev->partitions);
for (i = 1; i <= dev->partitions; i++) {
sprintf(partitionname, "%s%i", filename, i);
unlink(partitionname);
}
}
/* remove subdirectories */
if (strchr(dev->name, '/'))
delete_path(filename);
if (dev->symlink[0] != '\0') {
symlinks = dev->symlink;
while (1) {
linkname = strsep(&symlinks, " ");
if (linkname == NULL)
break;
strncpy(filename, udev_root, sizeof(filename));
strncat(filename, linkname, sizeof(filename));
dbg("unlinking symlink '%s'", filename);
retval = unlink(filename);
if (retval) {
dbg("unlink(%s) failed with error '%s'",
filename, strerror(errno));
return retval;
}
if (strchr(dev->symlink, '/')) {
delete_path(filename);
}
}
}
return retval;
}
/*
* Look up the sysfs path in the database to see if we have named this device
* something different from the kernel name. If we have, us it. If not, use
* the default kernel name for lack of anything else to know to do.
*/
int udev_remove_device(char *path, char *subsystem)
{
struct udevice dev;
char *temp;
int retval;
memset(&dev, 0, sizeof(dev));
retval = udevdb_get_dev(path, &dev);
if (retval) {
dbg("'%s' not found in database, falling back on default name", path);
temp = strrchr(path, '/');
if (temp == NULL)
return -ENODEV;
strncpy(dev.name, &temp[1], sizeof(dev.name));
}
dbg("name is '%s'", dev.name);
udevdb_delete_dev(path);
sysbus_send_remove(dev.name, path);
retval = delete_node(&dev);
return retval;
}