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a56ef38286
I've moved the malloc out of the udevdb into udev-remove to free the struct after use and not to allocate a different struct in the case the device is not in the data base. I seems a bit easier to read.
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
/*
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* udev-remove.c
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*
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* Userspace devfs
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*
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* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "udev.h"
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#include "udev_version.h"
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#include "udev_dbus.h"
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#include "namedev.h"
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#include "udevdb.h"
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#include "libsysfs/libsysfs.h"
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static int delete_path(char *path)
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{
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char *pos;
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int retval;
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pos = strrchr(path, '/');
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while (1) {
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*pos = '\0';
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pos = strrchr(path, '/');
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/* don't remove the last one */
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if ((pos == path) || (pos == NULL))
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break;
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/* remove if empty */
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retval = rmdir(path);
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if (retval) {
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if (errno == ENOTEMPTY)
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return 0;
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dbg("rmdir(%s) failed with error '%s'",
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path, strerror(errno));
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break;
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}
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dbg("removed '%s'", path);
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}
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return 0;
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}
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static int delete_node(struct udevice *dev)
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{
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char filename[255];
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char *symlinks;
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char *linkname;
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int retval;
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strncpy(filename, udev_root, sizeof(filename));
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strncat(filename, dev->name, sizeof(filename));
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dbg("unlinking node '%s'", filename);
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retval = unlink(filename);
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if (retval) {
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dbg("unlink(%s) failed with error '%s'",
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filename, strerror(errno));
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return retval;
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}
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/* remove subdirectories */
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if (strchr(dev->name, '/'))
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delete_path(filename);
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if (*dev->symlink) {
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symlinks = dev->symlink;
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while (1) {
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linkname = strsep(&symlinks, " ");
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if (linkname == NULL)
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break;
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strncpy(filename, udev_root, sizeof(filename));
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strncat(filename, linkname, sizeof(filename));
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dbg("unlinking symlink '%s'", filename);
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retval = unlink(filename);
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if (retval) {
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dbg("unlink(%s) failed with error '%s'",
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filename, strerror(errno));
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return retval;
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}
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if (strchr(dev->symlink, '/')) {
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delete_path(filename);
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}
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}
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}
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return retval;
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}
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/*
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* Look up the sysfs path in the database to see if we have named this device
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* something different from the kernel name. If we have, us it. If not, use
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* the default kernel name for lack of anything else to know to do.
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*/
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int udev_remove_device(char *path, char *subsystem)
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{
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struct udevice *dev;
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char *temp;
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int retval;
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dev = malloc(sizeof(*dev));
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if (dev == NULL)
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return -ENOMEM;
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memset(dev, 0, sizeof(*dev));
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retval = udevdb_get_dev(path, dev);
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if (retval) {
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dbg("'%s' not found in database, falling back on default name", path);
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temp = strrchr(path, '/');
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if (temp == NULL)
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return -ENODEV;
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strncpy(dev->name, &temp[1], sizeof(dev->name));
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}
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dbg("name is '%s'", dev->name);
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udevdb_delete_dev(path);
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sysbus_send_remove(dev->name, path);
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retval = delete_node(dev);
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free(dev);
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return retval;
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}
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