diff options
Diffstat (limited to 'udev_event.c')
| -rw-r--r-- | udev_event.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/udev_event.c b/udev_event.c new file mode 100644 index 0000000000..8a3ed29315 --- /dev/null +++ b/udev_event.c @@ -0,0 +1,141 @@ +/* + * udev_event.c - udev event process + * + * Copyright (C) 2004, 2005 Kay Sievers <kay.sievers@vrfy.org> + * + * 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 <stdio.h> +#include <stddef.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <ctype.h> +#include <dirent.h> +#include <syslog.h> +#include <sys/wait.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <sys/utsname.h> + +#include "udev_libc_wrapper.h" +#include "udev.h" +#include "logging.h" +#include "udev_rules.h" +#include "udev_utils.h" +#include "udev_sysfs.h" +#include "list.h" + + +int udev_process_event(struct udev_rules *rules, struct udevice *udev) +{ + int retval; + char path[PATH_SIZE]; + const char *error; + + if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS || udev->type == DEV_NET) { + /* handle device node */ + if (strcmp(udev->action, "add") == 0) { + struct sysfs_class_device *class_dev; + + /* wait for sysfs of /sys/class /sys/block */ + dbg("node add"); + snprintf(path, sizeof(path), "%s%s", sysfs_path, udev->devpath); + path[sizeof(path)-1] = '\0'; + class_dev = wait_class_device_open(path); + if (class_dev == NULL) { + dbg("open class device failed"); + return 0; + } + dbg("opened class_dev->name='%s'", class_dev->name); + wait_for_class_device(class_dev, &error); + + /* get major/minor */ + if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS) + udev->devt = get_devt(class_dev); + + if (udev->type == DEV_NET || udev->devt) { + /* name device */ + udev_rules_get_name(rules, udev, class_dev); + if (udev->ignore_device) { + info("device event will be ignored"); + sysfs_close_class_device(class_dev); + return -1; + } + if (udev->name[0] == '\0') { + info("device node creation supressed"); + sysfs_close_class_device(class_dev); + return -1; + } + /* create node, store in db */ + retval = udev_add_device(udev, class_dev); + } else { + dbg("no dev-file found"); + udev_rules_get_run(rules, udev, class_dev, NULL); + if (udev->ignore_device) { + info("device event will be ignored"); + sysfs_close_class_device(class_dev); + return -1; + } + } + sysfs_close_class_device(class_dev); + } else if (strcmp(udev->action, "remove") == 0) { + dbg("node remove"); + udev_rules_get_run(rules, udev, NULL, NULL); + if (udev->ignore_device) { + dbg("device event will be ignored"); + return -1; + } + + /* get name from db, remove db-entry, delete node */ + retval = udev_remove_device(udev); + } + + /* export name of device node or netif */ + if (udev->devname[0] != '\0') + setenv("DEVNAME", udev->devname, 1); + } else if (udev->type == DEV_DEVICE && strcmp(udev->action, "add") == 0) { + struct sysfs_device *devices_dev; + + /* wait for sysfs of /sys/devices/ */ + dbg("devices add"); + snprintf(path, sizeof(path), "%s%s", sysfs_path, udev->devpath); + path[sizeof(path)-1] = '\0'; + devices_dev = wait_devices_device_open(path); + if (!devices_dev) { + dbg("devices device unavailable (probably remove has beaten us)"); + return 0; + } + dbg("devices device opened '%s'", path); + wait_for_devices_device(devices_dev, &error); + udev_rules_get_run(rules, udev, NULL, devices_dev); + sysfs_close_device(devices_dev); + if (udev->ignore_device) { + info("device event will be ignored"); + return -1; + } + } else { + dbg("default handling"); + udev_rules_get_run(rules, udev, NULL, NULL); + if (udev->ignore_device) { + info("device event will be ignored"); + return -1; + } + } + return 0; +} |