940 lines
38 KiB
C
940 lines
38 KiB
C
/*
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* Copyright (C) 2003-2013 Kay Sievers <kay@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#include <string.h>
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#include <time.h>
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#include <net/if.h>
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#include <sys/prctl.h>
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#include <sys/poll.h>
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#include <sys/epoll.h>
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#include <sys/wait.h>
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#include <sys/signalfd.h>
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#include "udev.h"
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#include "rtnl-util.h"
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struct udev_event *udev_event_new(struct udev_device *dev) {
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struct udev *udev = udev_device_get_udev(dev);
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struct udev_event *event;
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event = new0(struct udev_event, 1);
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if (event == NULL)
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return NULL;
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event->dev = dev;
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event->udev = udev;
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udev_list_init(udev, &event->run_list, false);
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udev_list_init(udev, &event->seclabel_list, false);
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event->fd_signal = -1;
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event->birth_usec = now(CLOCK_MONOTONIC);
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return event;
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}
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void udev_event_unref(struct udev_event *event) {
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if (event == NULL)
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return;
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sd_rtnl_unref(event->rtnl);
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udev_list_cleanup(&event->run_list);
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udev_list_cleanup(&event->seclabel_list);
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free(event->program_result);
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free(event->name);
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free(event);
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}
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size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size) {
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struct udev_device *dev = event->dev;
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enum subst_type {
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SUBST_UNKNOWN,
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SUBST_DEVNODE,
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SUBST_ATTR,
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SUBST_ENV,
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SUBST_KERNEL,
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SUBST_KERNEL_NUMBER,
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SUBST_DRIVER,
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SUBST_DEVPATH,
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SUBST_ID,
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SUBST_MAJOR,
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SUBST_MINOR,
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SUBST_RESULT,
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SUBST_PARENT,
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SUBST_NAME,
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SUBST_LINKS,
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SUBST_ROOT,
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SUBST_SYS,
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};
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static const struct subst_map {
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const char *name;
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const char fmt;
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enum subst_type type;
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} map[] = {
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{ .name = "devnode", .fmt = 'N', .type = SUBST_DEVNODE },
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{ .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE },
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{ .name = "attr", .fmt = 's', .type = SUBST_ATTR },
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{ .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
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{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
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{ .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
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{ .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
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{ .name = "driver", .fmt = 'd', .type = SUBST_DRIVER },
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{ .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
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{ .name = "id", .fmt = 'b', .type = SUBST_ID },
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{ .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
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{ .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
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{ .name = "result", .fmt = 'c', .type = SUBST_RESULT },
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{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
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{ .name = "name", .fmt = 'D', .type = SUBST_NAME },
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{ .name = "links", .fmt = 'L', .type = SUBST_LINKS },
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{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
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{ .name = "sys", .fmt = 'S', .type = SUBST_SYS },
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};
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const char *from;
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char *s;
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size_t l;
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from = src;
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s = dest;
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l = size;
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for (;;) {
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enum subst_type type = SUBST_UNKNOWN;
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char attrbuf[UTIL_PATH_SIZE];
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char *attr = NULL;
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while (from[0] != '\0') {
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if (from[0] == '$') {
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/* substitute named variable */
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unsigned int i;
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if (from[1] == '$') {
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from++;
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goto copy;
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}
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for (i = 0; i < ELEMENTSOF(map); i++) {
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if (startswith(&from[1], map[i].name)) {
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type = map[i].type;
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from += strlen(map[i].name)+1;
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goto subst;
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}
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}
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} else if (from[0] == '%') {
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/* substitute format char */
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unsigned int i;
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if (from[1] == '%') {
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from++;
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goto copy;
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}
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for (i = 0; i < ELEMENTSOF(map); i++) {
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if (from[1] == map[i].fmt) {
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type = map[i].type;
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from += 2;
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goto subst;
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}
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}
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}
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copy:
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/* copy char */
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if (l == 0)
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goto out;
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s[0] = from[0];
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from++;
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s++;
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l--;
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}
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goto out;
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subst:
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/* extract possible $format{attr} */
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if (from[0] == '{') {
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unsigned int i;
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from++;
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for (i = 0; from[i] != '}'; i++) {
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if (from[i] == '\0') {
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log_error("missing closing brace for format '%s'", src);
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goto out;
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}
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}
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if (i >= sizeof(attrbuf))
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goto out;
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memcpy(attrbuf, from, i);
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attrbuf[i] = '\0';
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from += i+1;
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attr = attrbuf;
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} else {
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attr = NULL;
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}
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switch (type) {
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case SUBST_DEVPATH:
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l = strpcpy(&s, l, udev_device_get_devpath(dev));
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break;
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case SUBST_KERNEL:
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l = strpcpy(&s, l, udev_device_get_sysname(dev));
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break;
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case SUBST_KERNEL_NUMBER:
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if (udev_device_get_sysnum(dev) == NULL)
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break;
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l = strpcpy(&s, l, udev_device_get_sysnum(dev));
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break;
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case SUBST_ID:
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if (event->dev_parent == NULL)
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break;
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l = strpcpy(&s, l, udev_device_get_sysname(event->dev_parent));
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break;
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case SUBST_DRIVER: {
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const char *driver;
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if (event->dev_parent == NULL)
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break;
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driver = udev_device_get_driver(event->dev_parent);
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if (driver == NULL)
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break;
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l = strpcpy(&s, l, driver);
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break;
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}
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case SUBST_MAJOR: {
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char num[UTIL_PATH_SIZE];
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sprintf(num, "%d", major(udev_device_get_devnum(dev)));
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l = strpcpy(&s, l, num);
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break;
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}
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case SUBST_MINOR: {
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char num[UTIL_PATH_SIZE];
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sprintf(num, "%d", minor(udev_device_get_devnum(dev)));
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l = strpcpy(&s, l, num);
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break;
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}
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case SUBST_RESULT: {
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char *rest;
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int i;
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if (event->program_result == NULL)
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break;
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/* get part part of the result string */
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i = 0;
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if (attr != NULL)
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i = strtoul(attr, &rest, 10);
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if (i > 0) {
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char result[UTIL_PATH_SIZE];
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char tmp[UTIL_PATH_SIZE];
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char *cpos;
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strscpy(result, sizeof(result), event->program_result);
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cpos = result;
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while (--i) {
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while (cpos[0] != '\0' && !isspace(cpos[0]))
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cpos++;
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while (isspace(cpos[0]))
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cpos++;
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if (cpos[0] == '\0')
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break;
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}
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if (i > 0) {
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log_error("requested part of result string not found");
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break;
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}
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strscpy(tmp, sizeof(tmp), cpos);
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/* %{2+}c copies the whole string from the second part on */
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if (rest[0] != '+') {
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cpos = strchr(tmp, ' ');
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if (cpos)
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cpos[0] = '\0';
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}
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l = strpcpy(&s, l, tmp);
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} else {
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l = strpcpy(&s, l, event->program_result);
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}
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break;
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}
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case SUBST_ATTR: {
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const char *value = NULL;
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char vbuf[UTIL_NAME_SIZE];
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size_t len;
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int count;
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if (attr == NULL) {
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log_error("missing file parameter for attr");
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break;
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}
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/* try to read the value specified by "[dmi/id]product_name" */
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if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0)
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value = vbuf;
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/* try to read the attribute the device */
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if (value == NULL)
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value = udev_device_get_sysattr_value(event->dev, attr);
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/* try to read the attribute of the parent device, other matches have selected */
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if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev)
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value = udev_device_get_sysattr_value(event->dev_parent, attr);
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if (value == NULL)
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break;
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/* strip trailing whitespace, and replace unwanted characters */
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if (value != vbuf)
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strscpy(vbuf, sizeof(vbuf), value);
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len = strlen(vbuf);
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while (len > 0 && isspace(vbuf[--len]))
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vbuf[len] = '\0';
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count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT);
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if (count > 0)
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log_debug("%i character(s) replaced" , count);
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l = strpcpy(&s, l, vbuf);
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break;
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}
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case SUBST_PARENT: {
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struct udev_device *dev_parent;
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const char *devnode;
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dev_parent = udev_device_get_parent(event->dev);
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if (dev_parent == NULL)
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break;
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devnode = udev_device_get_devnode(dev_parent);
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if (devnode != NULL)
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l = strpcpy(&s, l, devnode + strlen("/dev/"));
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break;
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}
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case SUBST_DEVNODE:
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if (udev_device_get_devnode(dev) != NULL)
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l = strpcpy(&s, l, udev_device_get_devnode(dev));
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break;
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case SUBST_NAME:
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if (event->name != NULL)
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l = strpcpy(&s, l, event->name);
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else if (udev_device_get_devnode(dev) != NULL)
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l = strpcpy(&s, l, udev_device_get_devnode(dev) + strlen("/dev/"));
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else
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l = strpcpy(&s, l, udev_device_get_sysname(dev));
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break;
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case SUBST_LINKS: {
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struct udev_list_entry *list_entry;
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list_entry = udev_device_get_devlinks_list_entry(dev);
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if (list_entry == NULL)
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break;
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l = strpcpy(&s, l, udev_list_entry_get_name(list_entry) + strlen("/dev/"));
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udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
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l = strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry) + strlen("/dev/"), NULL);
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break;
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}
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case SUBST_ROOT:
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l = strpcpy(&s, l, "/dev");
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break;
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case SUBST_SYS:
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l = strpcpy(&s, l, "/sys");
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break;
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case SUBST_ENV:
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if (attr == NULL) {
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break;
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} else {
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const char *value;
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value = udev_device_get_property_value(event->dev, attr);
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if (value == NULL)
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break;
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l = strpcpy(&s, l, value);
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break;
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}
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default:
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log_error("unknown substitution type=%i", type);
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break;
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}
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}
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out:
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s[0] = '\0';
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return l;
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}
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static int spawn_exec(struct udev_event *event,
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const char *cmd, char *const argv[], char **envp, const sigset_t *sigmask,
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int fd_stdout, int fd_stderr) {
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_cleanup_close_ int fd = -1;
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/* discard child output or connect to pipe */
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fd = open("/dev/null", O_RDWR);
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if (fd >= 0) {
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dup2(fd, STDIN_FILENO);
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if (fd_stdout < 0)
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dup2(fd, STDOUT_FILENO);
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if (fd_stderr < 0)
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dup2(fd, STDERR_FILENO);
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} else
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log_error("open /dev/null failed: %m");
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/* connect pipes to std{out,err} */
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if (fd_stdout >= 0) {
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dup2(fd_stdout, STDOUT_FILENO);
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safe_close(fd_stdout);
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}
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if (fd_stderr >= 0) {
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dup2(fd_stderr, STDERR_FILENO);
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safe_close(fd_stderr);
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}
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/* terminate child in case parent goes away */
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prctl(PR_SET_PDEATHSIG, SIGTERM);
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/* restore original udev sigmask before exec */
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if (sigmask)
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sigprocmask(SIG_SETMASK, sigmask, NULL);
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execve(argv[0], argv, envp);
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/* exec failed */
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log_error("failed to execute '%s' '%s': %m", argv[0], cmd);
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return -errno;
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}
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static void spawn_read(struct udev_event *event,
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usec_t timeout_usec,
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const char *cmd,
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int fd_stdout, int fd_stderr,
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char *result, size_t ressize) {
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_cleanup_close_ int fd_ep = -1;
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struct epoll_event ep_outpipe = {
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.events = EPOLLIN,
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.data.ptr = &fd_stdout,
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};
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struct epoll_event ep_errpipe = {
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.events = EPOLLIN,
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.data.ptr = &fd_stderr,
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};
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size_t respos = 0;
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int r;
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/* read from child if requested */
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if (fd_stdout < 0 && fd_stderr < 0)
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return;
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fd_ep = epoll_create1(EPOLL_CLOEXEC);
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if (fd_ep < 0) {
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log_error("error creating epoll fd: %m");
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return;
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}
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if (fd_stdout >= 0) {
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r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe);
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if (r < 0) {
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log_error("fail to add stdout fd to epoll: %m");
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return;
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}
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}
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if (fd_stderr >= 0) {
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r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe);
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if (r < 0) {
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log_error("fail to add stderr fd to epoll: %m");
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return;
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}
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}
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/* read child output */
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while (fd_stdout >= 0 || fd_stderr >= 0) {
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int timeout;
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int fdcount;
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struct epoll_event ev[4];
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int i;
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if (timeout_usec > 0) {
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usec_t age_usec;
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age_usec = now(CLOCK_MONOTONIC) - event->birth_usec;
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if (age_usec >= timeout_usec) {
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log_error("timeout '%s'", cmd);
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return;
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}
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timeout = ((timeout_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC;
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} else {
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timeout = -1;
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}
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fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout);
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if (fdcount < 0) {
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if (errno == EINTR)
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continue;
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log_error("failed to poll: %m");
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return;
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} else if (fdcount == 0) {
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log_error("timeout '%s'", cmd);
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return;
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}
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for (i = 0; i < fdcount; i++) {
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int *fd = (int *)ev[i].data.ptr;
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if (*fd < 0)
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continue;
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if (ev[i].events & EPOLLIN) {
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ssize_t count;
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char buf[4096];
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count = read(*fd, buf, sizeof(buf)-1);
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if (count <= 0)
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continue;
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buf[count] = '\0';
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/* store stdout result */
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if (result != NULL && *fd == fd_stdout) {
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if (respos + count < ressize) {
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memcpy(&result[respos], buf, count);
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respos += count;
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} else {
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log_error("'%s' ressize %zd too short", cmd, ressize);
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}
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}
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/* log debug output only if we watch stderr */
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if (fd_stderr >= 0) {
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char *pos;
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char *line;
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pos = buf;
|
|
while ((line = strsep(&pos, "\n"))) {
|
|
if (pos != NULL || line[0] != '\0')
|
|
log_debug("'%s'(%s) '%s'", cmd, *fd == fd_stdout ? "out" : "err" , line);
|
|
}
|
|
}
|
|
} else if (ev[i].events & EPOLLHUP) {
|
|
r = epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL);
|
|
if (r < 0) {
|
|
log_error("failed to remove fd from epoll: %m");
|
|
return;
|
|
}
|
|
*fd = -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* return the child's stdout string */
|
|
if (result != NULL)
|
|
result[respos] = '\0';
|
|
}
|
|
|
|
static int spawn_wait(struct udev_event *event,
|
|
usec_t timeout_usec,
|
|
usec_t timeout_warn_usec,
|
|
const char *cmd, pid_t pid) {
|
|
struct pollfd pfd[1];
|
|
int err = 0;
|
|
|
|
pfd[0].events = POLLIN;
|
|
pfd[0].fd = event->fd_signal;
|
|
|
|
while (pid > 0) {
|
|
int timeout;
|
|
int timeout_warn = 0;
|
|
int fdcount;
|
|
|
|
if (timeout_usec > 0) {
|
|
usec_t age_usec;
|
|
|
|
age_usec = now(CLOCK_MONOTONIC) - event->birth_usec;
|
|
if (age_usec >= timeout_usec)
|
|
timeout = 1000;
|
|
else {
|
|
if (timeout_warn_usec > 0)
|
|
timeout_warn = ((timeout_warn_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC;
|
|
|
|
timeout = ((timeout_usec - timeout_warn_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC;
|
|
}
|
|
} else {
|
|
timeout = -1;
|
|
}
|
|
|
|
fdcount = poll(pfd, 1, timeout_warn);
|
|
if (fdcount < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
err = -errno;
|
|
log_error("failed to poll: %m");
|
|
goto out;
|
|
}
|
|
if (fdcount == 0) {
|
|
log_warning("slow: '%s' [%u]", cmd, pid);
|
|
|
|
fdcount = poll(pfd, 1, timeout);
|
|
if (fdcount < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
err = -errno;
|
|
log_error("failed to poll: %m");
|
|
goto out;
|
|
}
|
|
if (fdcount == 0) {
|
|
log_error("timeout: killing '%s' [%u]", cmd, pid);
|
|
kill(pid, SIGKILL);
|
|
}
|
|
}
|
|
|
|
if (pfd[0].revents & POLLIN) {
|
|
struct signalfd_siginfo fdsi;
|
|
int status;
|
|
ssize_t size;
|
|
|
|
size = read(event->fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
|
|
if (size != sizeof(struct signalfd_siginfo))
|
|
continue;
|
|
|
|
switch (fdsi.ssi_signo) {
|
|
case SIGTERM:
|
|
event->sigterm = true;
|
|
break;
|
|
case SIGCHLD:
|
|
if (waitpid(pid, &status, WNOHANG) < 0)
|
|
break;
|
|
if (WIFEXITED(status)) {
|
|
log_debug("'%s' [%u] exit with return code %i", cmd, pid, WEXITSTATUS(status));
|
|
if (WEXITSTATUS(status) != 0)
|
|
err = -1;
|
|
} else if (WIFSIGNALED(status)) {
|
|
log_error("'%s' [%u] terminated by signal %i (%s)", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
|
|
err = -1;
|
|
} else if (WIFSTOPPED(status)) {
|
|
log_error("'%s' [%u] stopped", cmd, pid);
|
|
err = -1;
|
|
} else if (WIFCONTINUED(status)) {
|
|
log_error("'%s' [%u] continued", cmd, pid);
|
|
err = -1;
|
|
} else {
|
|
log_error("'%s' [%u] exit with status 0x%04x", cmd, pid, status);
|
|
err = -1;
|
|
}
|
|
pid = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]) {
|
|
int i = 0;
|
|
char *pos;
|
|
|
|
if (strchr(cmd, ' ') == NULL) {
|
|
argv[i++] = cmd;
|
|
goto out;
|
|
}
|
|
|
|
pos = cmd;
|
|
while (pos != NULL && pos[0] != '\0') {
|
|
if (pos[0] == '\'') {
|
|
/* do not separate quotes */
|
|
pos++;
|
|
argv[i] = strsep(&pos, "\'");
|
|
if (pos != NULL)
|
|
while (pos[0] == ' ')
|
|
pos++;
|
|
} else {
|
|
argv[i] = strsep(&pos, " ");
|
|
if (pos != NULL)
|
|
while (pos[0] == ' ')
|
|
pos++;
|
|
}
|
|
i++;
|
|
}
|
|
out:
|
|
argv[i] = NULL;
|
|
if (argc)
|
|
*argc = i;
|
|
return 0;
|
|
}
|
|
|
|
int udev_event_spawn(struct udev_event *event,
|
|
usec_t timeout_usec,
|
|
usec_t timeout_warn_usec,
|
|
const char *cmd, char **envp, const sigset_t *sigmask,
|
|
char *result, size_t ressize) {
|
|
int outpipe[2] = {-1, -1};
|
|
int errpipe[2] = {-1, -1};
|
|
pid_t pid;
|
|
char arg[UTIL_PATH_SIZE];
|
|
char *argv[128];
|
|
char program[UTIL_PATH_SIZE];
|
|
int err = 0;
|
|
|
|
strscpy(arg, sizeof(arg), cmd);
|
|
udev_build_argv(event->udev, arg, NULL, argv);
|
|
|
|
/* pipes from child to parent */
|
|
if (result != NULL || log_get_max_level() >= LOG_INFO) {
|
|
if (pipe2(outpipe, O_NONBLOCK) != 0) {
|
|
err = -errno;
|
|
log_error("pipe failed: %m");
|
|
goto out;
|
|
}
|
|
}
|
|
if (log_get_max_level() >= LOG_INFO) {
|
|
if (pipe2(errpipe, O_NONBLOCK) != 0) {
|
|
err = -errno;
|
|
log_error("pipe failed: %m");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* allow programs in /usr/lib/udev/ to be called without the path */
|
|
if (argv[0][0] != '/') {
|
|
strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL);
|
|
argv[0] = program;
|
|
}
|
|
|
|
pid = fork();
|
|
switch(pid) {
|
|
case 0:
|
|
/* child closes parent's ends of pipes */
|
|
if (outpipe[READ_END] >= 0) {
|
|
close(outpipe[READ_END]);
|
|
outpipe[READ_END] = -1;
|
|
}
|
|
if (errpipe[READ_END] >= 0) {
|
|
close(errpipe[READ_END]);
|
|
errpipe[READ_END] = -1;
|
|
}
|
|
|
|
log_debug("starting '%s'", cmd);
|
|
|
|
spawn_exec(event, cmd, argv, envp, sigmask,
|
|
outpipe[WRITE_END], errpipe[WRITE_END]);
|
|
|
|
_exit(2 );
|
|
case -1:
|
|
log_error("fork of '%s' failed: %m", cmd);
|
|
err = -1;
|
|
goto out;
|
|
default:
|
|
/* parent closed child's ends of pipes */
|
|
if (outpipe[WRITE_END] >= 0) {
|
|
close(outpipe[WRITE_END]);
|
|
outpipe[WRITE_END] = -1;
|
|
}
|
|
if (errpipe[WRITE_END] >= 0) {
|
|
close(errpipe[WRITE_END]);
|
|
errpipe[WRITE_END] = -1;
|
|
}
|
|
|
|
spawn_read(event,
|
|
timeout_usec,
|
|
cmd,
|
|
outpipe[READ_END], errpipe[READ_END],
|
|
result, ressize);
|
|
|
|
err = spawn_wait(event, timeout_usec, timeout_warn_usec, cmd, pid);
|
|
}
|
|
|
|
out:
|
|
if (outpipe[READ_END] >= 0)
|
|
close(outpipe[READ_END]);
|
|
if (outpipe[WRITE_END] >= 0)
|
|
close(outpipe[WRITE_END]);
|
|
if (errpipe[READ_END] >= 0)
|
|
close(errpipe[READ_END]);
|
|
if (errpipe[WRITE_END] >= 0)
|
|
close(errpipe[WRITE_END]);
|
|
return err;
|
|
}
|
|
|
|
static int rename_netif(struct udev_event *event) {
|
|
struct udev_device *dev = event->dev;
|
|
char name[IFNAMSIZ];
|
|
const char *oldname;
|
|
int r;
|
|
|
|
oldname = udev_device_get_sysname(dev);
|
|
|
|
strscpy(name, IFNAMSIZ, event->name);
|
|
|
|
r = rtnl_set_link_name(&event->rtnl, udev_device_get_ifindex(dev), name);
|
|
if (r < 0) {
|
|
log_error("error changing net interface name '%s' to '%s': %s",
|
|
oldname, name, strerror(-r));
|
|
return r;
|
|
}
|
|
|
|
log_debug("renamed network interface '%s' to '%s'\n", oldname, name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void udev_event_execute_rules(struct udev_event *event,
|
|
usec_t timeout_usec,
|
|
usec_t timeout_warn_usec,
|
|
struct udev_rules *rules, const sigset_t *sigmask) {
|
|
struct udev_device *dev = event->dev;
|
|
|
|
if (udev_device_get_subsystem(dev) == NULL)
|
|
return;
|
|
|
|
if (streq(udev_device_get_action(dev), "remove")) {
|
|
udev_device_read_db(dev, NULL);
|
|
udev_device_delete_db(dev);
|
|
udev_device_tag_index(dev, NULL, false);
|
|
|
|
if (major(udev_device_get_devnum(dev)) != 0)
|
|
udev_watch_end(event->udev, dev);
|
|
|
|
udev_rules_apply_to_event(rules, event, timeout_usec, timeout_warn_usec, sigmask);
|
|
|
|
if (major(udev_device_get_devnum(dev)) != 0)
|
|
udev_node_remove(dev);
|
|
} else {
|
|
event->dev_db = udev_device_new(event->udev);
|
|
if (event->dev_db != NULL) {
|
|
udev_device_set_syspath(event->dev_db, udev_device_get_syspath(dev));
|
|
udev_device_set_subsystem(event->dev_db, udev_device_get_subsystem(dev));
|
|
udev_device_set_devnum(event->dev_db, udev_device_get_devnum(dev));
|
|
udev_device_read_db(event->dev_db, NULL);
|
|
udev_device_set_info_loaded(event->dev_db);
|
|
|
|
/* disable watch during event processing */
|
|
if (major(udev_device_get_devnum(dev)) != 0)
|
|
udev_watch_end(event->udev, event->dev_db);
|
|
}
|
|
|
|
if (major(udev_device_get_devnum(dev)) == 0 &&
|
|
streq(udev_device_get_action(dev), "move")) {
|
|
struct udev_list_entry *entry;
|
|
|
|
for ((entry = udev_device_get_properties_list_entry(event->dev_db)); entry; entry = udev_list_entry_get_next(entry)) {
|
|
const char *key, *value;
|
|
struct udev_list_entry *property;
|
|
|
|
key = udev_list_entry_get_name(entry);
|
|
value = udev_list_entry_get_value(entry);
|
|
|
|
property = udev_device_add_property(event->dev, key, value);
|
|
udev_list_entry_set_num(property, true);
|
|
}
|
|
}
|
|
|
|
udev_rules_apply_to_event(rules, event, timeout_usec, timeout_warn_usec, sigmask);
|
|
|
|
/* rename a new network interface, if needed */
|
|
if (udev_device_get_ifindex(dev) > 0 && streq(udev_device_get_action(dev), "add") &&
|
|
event->name != NULL && !streq(event->name, udev_device_get_sysname(dev))) {
|
|
char syspath[UTIL_PATH_SIZE];
|
|
char *pos;
|
|
int r;
|
|
|
|
r = rename_netif(event);
|
|
if (r >= 0) {
|
|
/* remember old name */
|
|
udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
|
|
|
|
/* now change the devpath, because the kernel device name has changed */
|
|
strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev));
|
|
pos = strrchr(syspath, '/');
|
|
if (pos != NULL) {
|
|
pos++;
|
|
strscpy(pos, sizeof(syspath) - (pos - syspath), event->name);
|
|
udev_device_set_syspath(event->dev, syspath);
|
|
udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
|
|
log_debug("changed devpath to '%s'", udev_device_get_devpath(dev));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (major(udev_device_get_devnum(dev)) > 0) {
|
|
bool apply;
|
|
|
|
/* remove/update possible left-over symlinks from old database entry */
|
|
if (event->dev_db != NULL)
|
|
udev_node_update_old_links(dev, event->dev_db);
|
|
|
|
if (!event->owner_set)
|
|
event->uid = udev_device_get_devnode_uid(dev);
|
|
|
|
if (!event->group_set)
|
|
event->gid = udev_device_get_devnode_gid(dev);
|
|
|
|
if (!event->mode_set) {
|
|
if (udev_device_get_devnode_mode(dev) > 0) {
|
|
/* kernel supplied value */
|
|
event->mode = udev_device_get_devnode_mode(dev);
|
|
} else if (event->gid > 0) {
|
|
/* default 0660 if a group is assigned */
|
|
event->mode = 0660;
|
|
} else {
|
|
/* default 0600 */
|
|
event->mode = 0600;
|
|
}
|
|
}
|
|
|
|
apply = streq(udev_device_get_action(dev), "add") || event->owner_set || event->group_set || event->mode_set;
|
|
udev_node_add(dev, apply, event->mode, event->uid, event->gid, &event->seclabel_list);
|
|
}
|
|
|
|
/* preserve old, or get new initialization timestamp */
|
|
if (event->dev_db != NULL && udev_device_get_usec_initialized(event->dev_db) > 0)
|
|
udev_device_set_usec_initialized(event->dev, udev_device_get_usec_initialized(event->dev_db));
|
|
else if (udev_device_get_usec_initialized(event->dev) == 0)
|
|
udev_device_set_usec_initialized(event->dev, now(CLOCK_MONOTONIC));
|
|
|
|
/* (re)write database file */
|
|
udev_device_update_db(dev);
|
|
udev_device_tag_index(dev, event->dev_db, true);
|
|
udev_device_set_is_initialized(dev);
|
|
|
|
udev_device_unref(event->dev_db);
|
|
event->dev_db = NULL;
|
|
}
|
|
}
|
|
|
|
void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, usec_t timeout_warn_usec, const sigset_t *sigmask) {
|
|
struct udev_list_entry *list_entry;
|
|
|
|
udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
|
|
const char *cmd = udev_list_entry_get_name(list_entry);
|
|
enum udev_builtin_cmd builtin_cmd = udev_list_entry_get_num(list_entry);
|
|
|
|
if (builtin_cmd < UDEV_BUILTIN_MAX) {
|
|
char command[UTIL_PATH_SIZE];
|
|
|
|
udev_event_apply_format(event, cmd, command, sizeof(command));
|
|
udev_builtin_run(event->dev, builtin_cmd, command, false);
|
|
} else {
|
|
char program[UTIL_PATH_SIZE];
|
|
char **envp;
|
|
|
|
if (event->exec_delay > 0) {
|
|
log_debug("delay execution of '%s'", program);
|
|
sleep(event->exec_delay);
|
|
}
|
|
|
|
udev_event_apply_format(event, cmd, program, sizeof(program));
|
|
envp = udev_device_get_properties_envp(event->dev);
|
|
udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, NULL, 0);
|
|
}
|
|
}
|
|
}
|