/* * udev_utils.c - generic stuff used by udev * * Copyright (C) 2004, 2005 Kay Sievers * * 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 #include #include #include #include #include #include #include "udev.h" #include "udev_rules.h" struct udevice *udev_device_init(void) { struct udevice *udev; udev = malloc(sizeof(struct udevice)); if (udev == NULL) return NULL; memset(udev, 0x00, sizeof(struct udevice)); INIT_LIST_HEAD(&udev->symlink_list); INIT_LIST_HEAD(&udev->run_list); INIT_LIST_HEAD(&udev->env_list); /* set sysfs device to local storage, can be overridden if needed */ udev->dev = &udev->dev_local; /* default node permissions */ udev->mode = 0660; strcpy(udev->owner, "root"); strcpy(udev->group, "root"); return udev; } void udev_device_cleanup(struct udevice *udev) { name_list_cleanup(&udev->symlink_list); name_list_cleanup(&udev->run_list); name_list_cleanup(&udev->env_list); free(udev); } dev_t udev_device_get_devt(struct udevice *udev) { const char *attr; unsigned int major, minor; /* read it from sysfs */ attr = sysfs_attr_get_value(udev->dev->devpath, "dev"); if (attr != NULL) { if (sscanf(attr, "%u:%u", &major, &minor) == 2) return makedev(major, minor); } return makedev(0, 0); } int udev_device_event(struct udev_rules *rules, struct udevice *udev) { int retval = 0; /* device node or netif */ if ((major(udev->devt) != 0 || strcmp(udev->dev->subsystem, "net") == 0) && strcmp(udev->action, "add") == 0) { dbg("device node or netif add '%s'", udev->dev->devpath); udev_rules_get_name(rules, udev); if (udev->ignore_device) { info("device event will be ignored"); return 0; } /* create node, store in db */ if (udev->name[0] != '\0') retval = udev_add_device(udev); else info("device node creation supressed"); return 0; } if (major(udev->devt) != 0 && strcmp(udev->action, "remove") == 0) { struct name_entry *name_loop; udev_rules_get_run(rules, udev); if (udev->ignore_device) { info("device event will be ignored"); return 0; } /* get data from db, remove db-entry, delete node */ retval = udev_remove_device(udev); /* restore stored persistent data */ list_for_each_entry(name_loop, &udev->env_list, node) putenv(name_loop->name); return 0; } /* default devices */ udev_rules_get_run(rules, udev); if (udev->ignore_device) info("device event will be ignored"); return retval; }