mirror of
https://github.com/systemd/systemd-stable.git
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99 lines
2.2 KiB
C
99 lines
2.2 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 "namedev.h"
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#include "udevdb.h"
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#include "libsysfs/libsysfs.h"
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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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static char *get_name(char *path, int major, int minor)
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{
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static char name[100];
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struct udevice *dev;
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char *temp;
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dev = udevdb_get_dev(path);
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if (dev != NULL) {
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strcpy(name, dev->name);
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goto exit;
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}
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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 NULL;
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strncpy(name, &temp[1], sizeof(name));
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exit:
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dbg("name is %s", name);
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return &name[0];
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}
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/*
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* We also want to clean up any symlinks that were created in create_node()
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*/
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static int delete_node(char *name)
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{
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char filename[255];
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strncpy(filename, udev_root, sizeof(filename));
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strncat(filename, name, sizeof(filename));
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dbg("unlinking %s", filename);
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return unlink(filename);
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}
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int udev_remove_device(char *device, char *subsystem)
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{
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char *name;
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int retval = 0;
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name = get_name(device, 0, 0);
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if (name == NULL) {
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dbg ("get_name failed");
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retval = -ENODEV;
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goto exit;
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}
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udevdb_delete_dev(device);
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return delete_node(name);
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exit:
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return retval;
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}
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