+++ /dev/null
-/*
- * Copyright (C) 2003-2010 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, either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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, see <http://www.gnu.org/licenses/>.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <stddef.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <ctype.h>
-#include <string.h>
-#include <time.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-#include <sys/prctl.h>
-#include <sys/poll.h>
-#include <sys/epoll.h>
-#include <sys/wait.h>
-#include <sys/socket.h>
-#include <sys/signalfd.h>
-#include <linux/sockios.h>
-
-#include "udev.h"
-
-struct udev_event *udev_event_new(struct udev_device *dev)
-{
- struct udev *udev = udev_device_get_udev(dev);
- struct udev_event *event;
-
- event = calloc(1, sizeof(struct udev_event));
- if (event == NULL)
- return NULL;
- event->dev = dev;
- event->udev = udev;
- udev_list_init(udev, &event->run_list, false);
- event->fd_signal = -1;
- event->birth_usec = now_usec();
- event->timeout_usec = 30 * 1000 * 1000;
- dbg(event->udev, "allocated event %p\n", event);
- return event;
-}
-
-void udev_event_unref(struct udev_event *event)
-{
- if (event == NULL)
- return;
- udev_list_cleanup(&event->run_list);
- free(event->program_result);
- free(event->name);
- dbg(event->udev, "free event %p\n", event);
- free(event);
-}
-
-size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size)
-{
- struct udev_device *dev = event->dev;
- enum subst_type {
- SUBST_UNKNOWN,
- SUBST_DEVNODE,
- SUBST_ATTR,
- SUBST_ENV,
- SUBST_KERNEL,
- SUBST_KERNEL_NUMBER,
- SUBST_DRIVER,
- SUBST_DEVPATH,
- SUBST_ID,
- SUBST_MAJOR,
- SUBST_MINOR,
- SUBST_RESULT,
- SUBST_PARENT,
- SUBST_NAME,
- SUBST_LINKS,
- SUBST_ROOT,
- SUBST_SYS,
- };
- static const struct subst_map {
- char *name;
- char fmt;
- enum subst_type type;
- } map[] = {
- { .name = "devnode", .fmt = 'N', .type = SUBST_DEVNODE },
- { .name = "tempnode", .fmt = 'N', .type = SUBST_DEVNODE },
- { .name = "attr", .fmt = 's', .type = SUBST_ATTR },
- { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
- { .name = "env", .fmt = 'E', .type = SUBST_ENV },
- { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
- { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
- { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER },
- { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
- { .name = "id", .fmt = 'b', .type = SUBST_ID },
- { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
- { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
- { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
- { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
- { .name = "name", .fmt = 'D', .type = SUBST_NAME },
- { .name = "links", .fmt = 'L', .type = SUBST_LINKS },
- { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
- { .name = "sys", .fmt = 'S', .type = SUBST_SYS },
- };
- const char *from;
- char *s;
- size_t l;
-
- from = src;
- s = dest;
- l = size;
-
- for (;;) {
- enum subst_type type = SUBST_UNKNOWN;
- char attrbuf[UTIL_PATH_SIZE];
- char *attr = NULL;
-
- while (from[0] != '\0') {
- if (from[0] == '$') {
- /* substitute named variable */
- unsigned int i;
-
- if (from[1] == '$') {
- from++;
- goto copy;
- }
-
- for (i = 0; i < ARRAY_SIZE(map); i++) {
- if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) {
- type = map[i].type;
- from += strlen(map[i].name)+1;
- dbg(event->udev, "will substitute format name '%s'\n", map[i].name);
- goto subst;
- }
- }
- } else if (from[0] == '%') {
- /* substitute format char */
- unsigned int i;
-
- if (from[1] == '%') {
- from++;
- goto copy;
- }
-
- for (i = 0; i < ARRAY_SIZE(map); i++) {
- if (from[1] == map[i].fmt) {
- type = map[i].type;
- from += 2;
- dbg(event->udev, "will substitute format char '%c'\n", map[i].fmt);
- goto subst;
- }
- }
- }
-copy:
- /* copy char */
- if (l == 0)
- goto out;
- s[0] = from[0];
- from++;
- s++;
- l--;
- }
-
- goto out;
-subst:
- /* extract possible $format{attr} */
- if (from[0] == '{') {
- unsigned int i;
-
- from++;
- for (i = 0; from[i] != '}'; i++) {
- if (from[i] == '\0') {
- err(event->udev, "missing closing brace for format '%s'\n", src);
- goto out;
- }
- }
- if (i >= sizeof(attrbuf))
- goto out;
- memcpy(attrbuf, from, i);
- attrbuf[i] = '\0';
- from += i+1;
- attr = attrbuf;
- } else {
- attr = NULL;
- }
-
- switch (type) {
- case SUBST_DEVPATH:
- l = util_strpcpy(&s, l, udev_device_get_devpath(dev));
- dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
- break;
- case SUBST_KERNEL:
- l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
- dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
- break;
- case SUBST_KERNEL_NUMBER:
- if (udev_device_get_sysnum(dev) == NULL)
- break;
- l = util_strpcpy(&s, l, udev_device_get_sysnum(dev));
- dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
- break;
- case SUBST_ID:
- if (event->dev_parent == NULL)
- break;
- l = util_strpcpy(&s, l, udev_device_get_sysname(event->dev_parent));
- dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
- break;
- case SUBST_DRIVER: {
- const char *driver;
-
- if (event->dev_parent == NULL)
- break;
-
- driver = udev_device_get_driver(event->dev_parent);
- if (driver == NULL)
- break;
- l = util_strpcpy(&s, l, driver);
- dbg(event->udev, "substitute driver '%s'\n", driver);
- break;
- }
- case SUBST_MAJOR: {
- char num[UTIL_PATH_SIZE];
-
- sprintf(num, "%d", major(udev_device_get_devnum(dev)));
- l = util_strpcpy(&s, l, num);
- dbg(event->udev, "substitute major number '%s'\n", num);
- break;
- }
- case SUBST_MINOR: {
- char num[UTIL_PATH_SIZE];
-
- sprintf(num, "%d", minor(udev_device_get_devnum(dev)));
- l = util_strpcpy(&s, l, num);
- dbg(event->udev, "substitute minor number '%s'\n", num);
- break;
- }
- case SUBST_RESULT: {
- char *rest;
- int i;
-
- if (event->program_result == NULL)
- break;
- /* get part part of the result string */
- i = 0;
- if (attr != NULL)
- i = strtoul(attr, &rest, 10);
- if (i > 0) {
- char result[UTIL_PATH_SIZE];
- char tmp[UTIL_PATH_SIZE];
- char *cpos;
-
- dbg(event->udev, "request part #%d of result string\n", i);
- util_strscpy(result, sizeof(result), event->program_result);
- cpos = result;
- while (--i) {
- while (cpos[0] != '\0' && !isspace(cpos[0]))
- cpos++;
- while (isspace(cpos[0]))
- cpos++;
- }
- if (i > 0) {
- err(event->udev, "requested part of result string not found\n");
- break;
- }
- util_strscpy(tmp, sizeof(tmp), cpos);
- /* %{2+}c copies the whole string from the second part on */
- if (rest[0] != '+') {
- cpos = strchr(tmp, ' ');
- if (cpos)
- cpos[0] = '\0';
- }
- l = util_strpcpy(&s, l, tmp);
- dbg(event->udev, "substitute part of result string '%s'\n", tmp);
- } else {
- l = util_strpcpy(&s, l, event->program_result);
- dbg(event->udev, "substitute result string '%s'\n", event->program_result);
- }
- break;
- }
- case SUBST_ATTR: {
- const char *value = NULL;
- char vbuf[UTIL_NAME_SIZE];
- size_t len;
- int count;
-
- if (attr == NULL) {
- err(event->udev, "missing file parameter for attr\n");
- break;
- }
-
- /* try to read the value specified by "[dmi/id]product_name" */
- if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0)
- value = vbuf;
-
- /* try to read the attribute the device */
- if (value == NULL)
- value = udev_device_get_sysattr_value(event->dev, attr);
-
- /* try to read the attribute of the parent device, other matches have selected */
- if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev)
- value = udev_device_get_sysattr_value(event->dev_parent, attr);
-
- if (value == NULL)
- break;
-
- /* strip trailing whitespace, and replace unwanted characters */
- if (value != vbuf)
- util_strscpy(vbuf, sizeof(vbuf), value);
- len = strlen(vbuf);
- while (len > 0 && isspace(vbuf[--len]))
- vbuf[len] = '\0';
- count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT);
- if (count > 0)
- info(event->udev, "%i character(s) replaced\n" , count);
- l = util_strpcpy(&s, l, vbuf);
- dbg(event->udev, "substitute sysfs value '%s'\n", vbuf);
- break;
- }
- case SUBST_PARENT: {
- struct udev_device *dev_parent;
- const char *devnode;
-
- dev_parent = udev_device_get_parent(event->dev);
- if (dev_parent == NULL)
- break;
- devnode = udev_device_get_devnode(dev_parent);
- if (devnode != NULL) {
- size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
-
- l = util_strpcpy(&s, l, &devnode[devlen]);
- dbg(event->udev, "found parent '%s', got node name '%s'\n",
- udev_device_get_syspath(dev_parent), &devnode[devlen]);
- }
- break;
- }
- case SUBST_DEVNODE:
- if (udev_device_get_devnode(dev) != NULL)
- l = util_strpcpy(&s, l, udev_device_get_devnode(dev));
- break;
- case SUBST_NAME: {
- if (event->name != NULL) {
- l = util_strpcpy(&s, l, event->name);
- dbg(event->udev, "substitute custom node name '%s'\n", event->name);
- } else if (udev_device_get_devnode(dev) != NULL) {
- size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
-
- l = util_strpcpy(&s, l, &udev_device_get_devnode(dev)[devlen]);
- dbg(event->udev, "substitute node name'%s'\n", &udev_device_get_devnode(dev)[devlen]);
- } else {
- l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
- dbg(event->udev, "substitute device name'%s'\n", udev_device_get_sysname(dev));
- }
- break;
- }
- case SUBST_LINKS: {
- size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
- struct udev_list_entry *list_entry;
-
- list_entry = udev_device_get_devlinks_list_entry(dev);
- if (list_entry == NULL)
- break;
- l = util_strpcpy(&s, l, &udev_list_entry_get_name(list_entry)[devlen]);
- udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
- l = util_strpcpyl(&s, l, " ", &udev_list_entry_get_name(list_entry)[devlen], NULL);
- break;
- }
- case SUBST_ROOT:
- l = util_strpcpy(&s, l, udev_get_dev_path(event->udev));
- dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
- break;
- case SUBST_SYS:
- l = util_strpcpy(&s, l, udev_get_sys_path(event->udev));
- dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
- break;
- case SUBST_ENV:
- if (attr == NULL) {
- dbg(event->udev, "missing attribute\n");
- break;
- } else {
- const char *value;
-
- value = udev_device_get_property_value(event->dev, attr);
- if (value == NULL)
- break;
- dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
- l = util_strpcpy(&s, l, value);
- break;
- }
- default:
- err(event->udev, "unknown substitution type=%i\n", type);
- break;
- }
- }
-
-out:
- s[0] = '\0';
- dbg(event->udev, "'%s' -> '%s' (%zu)\n", src, dest, l);
- return l;
-}
-
-static int spawn_exec(struct udev_event *event,
- const char *cmd, char *const argv[], char **envp, const sigset_t *sigmask,
- int fd_stdout, int fd_stderr)
-{
- struct udev *udev = event->udev;
- int err;
- int fd;
-
- /* discard child output or connect to pipe */
- fd = open("/dev/null", O_RDWR);
- if (fd >= 0) {
- dup2(fd, STDIN_FILENO);
- if (fd_stdout < 0)
- dup2(fd, STDOUT_FILENO);
- if (fd_stderr < 0)
- dup2(fd, STDERR_FILENO);
- close(fd);
- } else {
- err(udev, "open /dev/null failed: %m\n");
- }
-
- /* connect pipes to std{out,err} */
- if (fd_stdout >= 0) {
- dup2(fd_stdout, STDOUT_FILENO);
- close(fd_stdout);
- }
- if (fd_stderr >= 0) {
- dup2(fd_stderr, STDERR_FILENO);
- close(fd_stderr);
- }
-
- /* terminate child in case parent goes away */
- prctl(PR_SET_PDEATHSIG, SIGTERM);
-
- /* restore original udev sigmask before exec */
- if (sigmask)
- sigprocmask(SIG_SETMASK, sigmask, NULL);
-
- execve(argv[0], argv, envp);
-
- /* exec failed */
- err = -errno;
- err(udev, "failed to execute '%s' '%s': %m\n", argv[0], cmd);
- return err;
-}
-
-static void spawn_read(struct udev_event *event,
- const char *cmd,
- int fd_stdout, int fd_stderr,
- char *result, size_t ressize)
-{
- struct udev *udev = event->udev;
- size_t respos = 0;
- int fd_ep = -1;
- struct epoll_event ep_outpipe, ep_errpipe;
-
- /* read from child if requested */
- if (fd_stdout < 0 && fd_stderr < 0)
- return;
-
- fd_ep = epoll_create1(EPOLL_CLOEXEC);
- if (fd_ep < 0) {
- err(udev, "error creating epoll fd: %m\n");
- goto out;
- }
-
- if (fd_stdout >= 0) {
- memset(&ep_outpipe, 0, sizeof(struct epoll_event));
- ep_outpipe.events = EPOLLIN;
- ep_outpipe.data.ptr = &fd_stdout;
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe) < 0) {
- err(udev, "fail to add fd to epoll: %m\n");
- goto out;
- }
- }
-
- if (fd_stderr >= 0) {
- memset(&ep_errpipe, 0, sizeof(struct epoll_event));
- ep_errpipe.events = EPOLLIN;
- ep_errpipe.data.ptr = &fd_stderr;
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe) < 0) {
- err(udev, "fail to add fd to epoll: %m\n");
- goto out;
- }
- }
-
- /* read child output */
- while (fd_stdout >= 0 || fd_stderr >= 0) {
- int timeout;
- int fdcount;
- struct epoll_event ev[4];
- int i;
-
- if (event->timeout_usec > 0) {
- unsigned long long age_usec;
-
- age_usec = now_usec() - event->birth_usec;
- if (age_usec >= event->timeout_usec) {
- err(udev, "timeout '%s'\n", cmd);
- goto out;
- }
- timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
- } else {
- timeout = -1;
- }
-
- fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout);
- if (fdcount < 0) {
- if (errno == EINTR)
- continue;
- err(udev, "failed to poll: %m\n");
- goto out;
- }
- if (fdcount == 0) {
- err(udev, "timeout '%s'\n", cmd);
- goto out;
- }
-
- for (i = 0; i < fdcount; i++) {
- int *fd = (int *)ev[i].data.ptr;
-
- if (ev[i].events & EPOLLIN) {
- ssize_t count;
- char buf[4096];
-
- count = read(*fd, buf, sizeof(buf)-1);
- if (count <= 0)
- continue;
- buf[count] = '\0';
-
- /* store stdout result */
- if (result != NULL && *fd == fd_stdout) {
- if (respos + count < ressize) {
- memcpy(&result[respos], buf, count);
- respos += count;
- } else {
- err(udev, "'%s' ressize %zd too short\n", cmd, ressize);
- }
- }
-
- /* log debug output only if we watch stderr */
- if (fd_stderr >= 0) {
- char *pos;
- char *line;
-
- pos = buf;
- while ((line = strsep(&pos, "\n"))) {
- if (pos != NULL || line[0] != '\0')
- info(udev, "'%s'(%s) '%s'\n", cmd, *fd == fd_stdout ? "out" : "err" , line);
- }
- }
- } else if (ev[i].events & EPOLLHUP) {
- if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) {
- err(udev, "failed to remove fd from epoll: %m\n");
- goto out;
- }
- *fd = -1;
- }
- }
- }
-
- /* return the child's stdout string */
- if (result != NULL) {
- result[respos] = '\0';
- dbg(udev, "result='%s'\n", result);
- }
-out:
- if (fd_ep >= 0)
- close(fd_ep);
-}
-
-static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid)
-{
- struct udev *udev = event->udev;
- struct pollfd pfd[1];
- int err = 0;
-
- pfd[0].events = POLLIN;
- pfd[0].fd = event->fd_signal;
-
- while (pid > 0) {
- int timeout;
- int fdcount;
-
- if (event->timeout_usec > 0) {
- unsigned long long age_usec;
-
- age_usec = now_usec() - event->birth_usec;
- if (age_usec >= event->timeout_usec)
- timeout = 1000;
- else
- timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
- } else {
- timeout = -1;
- }
-
- fdcount = poll(pfd, 1, timeout);
- if (fdcount < 0) {
- if (errno == EINTR)
- continue;
- err = -errno;
- err(udev, "failed to poll: %m\n");
- goto out;
- }
- if (fdcount == 0) {
- err(udev, "timeout: killing '%s' [%u]\n", 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)) {
- info(udev, "'%s' [%u] exit with return code %i\n", cmd, pid, WEXITSTATUS(status));
- if (WEXITSTATUS(status) != 0)
- err = -1;
- } else if (WIFSIGNALED(status)) {
- err(udev, "'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
- err = -1;
- } else if (WIFSTOPPED(status)) {
- err(udev, "'%s' [%u] stopped\n", cmd, pid);
- err = -1;
- } else if (WIFCONTINUED(status)) {
- err(udev, "'%s' [%u] continued\n", cmd, pid);
- err = -1;
- } else {
- err(udev, "'%s' [%u] exit with status 0x%04x\n", 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++;
- }
- dbg(udev, "argv[%i] '%s'\n", i, argv[i]);
- i++;
- }
-out:
- argv[i] = NULL;
- if (argc)
- *argc = i;
- return 0;
-}
-
-int udev_event_spawn(struct udev_event *event,
- const char *cmd, char **envp, const sigset_t *sigmask,
- char *result, size_t ressize)
-{
- struct udev *udev = event->udev;
- 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;
-
- util_strscpy(arg, sizeof(arg), cmd);
- udev_build_argv(event->udev, arg, NULL, argv);
-
- /* pipes from child to parent */
- if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe2(outpipe, O_NONBLOCK) != 0) {
- err = -errno;
- err(udev, "pipe failed: %m\n");
- goto out;
- }
- }
- if (udev_get_log_priority(udev) >= LOG_INFO) {
- if (pipe2(errpipe, O_NONBLOCK) != 0) {
- err = -errno;
- err(udev, "pipe failed: %m\n");
- goto out;
- }
- }
-
- /* allow programs in /usr/lib/udev/ to be called without the path */
- if (argv[0][0] != '/') {
- util_strscpyl(program, sizeof(program), PKGLIBEXECDIR "/", 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;
- }
-
- info(udev, "starting '%s'\n", cmd);
-
- err = spawn_exec(event, cmd, argv, envp, sigmask,
- outpipe[WRITE_END], errpipe[WRITE_END]);
-
- _exit(2 );
- case -1:
- err(udev, "fork of '%s' failed: %m\n", 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, cmd,
- outpipe[READ_END], errpipe[READ_END],
- result, ressize);
-
- err = spawn_wait(event, 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 void rename_netif_kernel_log(struct ifreq ifr)
-{
- int klog;
- FILE *f;
-
- klog = open("/dev/kmsg", O_WRONLY);
- if (klog < 0)
- return;
-
- f = fdopen(klog, "w");
- if (f == NULL) {
- close(klog);
- return;
- }
-
- fprintf(f, "<30>udevd[%u]: renamed network interface %s to %s\n",
- getpid(), ifr.ifr_name, ifr.ifr_newname);
- fclose(f);
-}
-
-static int rename_netif(struct udev_event *event)
-{
- struct udev_device *dev = event->dev;
- int sk;
- struct ifreq ifr;
- int loop;
- int err;
-
- info(event->udev, "changing net interface name from '%s' to '%s'\n",
- udev_device_get_sysname(dev), event->name);
-
- sk = socket(PF_INET, SOCK_DGRAM, 0);
- if (sk < 0) {
- err = -errno;
- err(event->udev, "error opening socket: %m\n");
- return err;
- }
-
- memset(&ifr, 0x00, sizeof(struct ifreq));
- util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
- util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
- err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err == 0) {
- rename_netif_kernel_log(ifr);
- goto out;
- }
-
- /* keep trying if the destination interface name already exists */
- err = -errno;
- if (err != -EEXIST)
- goto out;
-
- /* free our own name, another process may wait for us */
- snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
- err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err < 0) {
- err = -errno;
- goto out;
- }
-
- /* log temporary name */
- rename_netif_kernel_log(ifr);
-
- /* wait a maximum of 90 seconds for our target to become available */
- util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
- util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
- loop = 90 * 20;
- while (loop--) {
- const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
-
- dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
- event->name, (90 * 20) - loop);
- nanosleep(&duration, NULL);
-
- err = ioctl(sk, SIOCSIFNAME, &ifr);
- if (err == 0) {
- rename_netif_kernel_log(ifr);
- break;
- }
- err = -errno;
- if (err != -EEXIST)
- break;
- }
-
-out:
- if (err < 0)
- err(event->udev, "error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
- close(sk);
- return err;
-}
-
-int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, const sigset_t *sigmask)
-{
- struct udev_device *dev = event->dev;
- int err = 0;
-
- if (udev_device_get_subsystem(dev) == NULL)
- return -1;
-
- if (strcmp(udev_device_get_action(dev), "remove") == 0) {
- 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, sigmask);
-
- if (major(udev_device_get_devnum(dev)) != 0)
- udev_node_remove(dev);
- } else {
- event->dev_db = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
- if (event->dev_db != NULL) {
- 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);
- }
-
- udev_rules_apply_to_event(rules, event, sigmask);
-
- /* rename a new network interface, if needed */
- if (udev_device_get_ifindex(dev) > 0 && strcmp(udev_device_get_action(dev), "add") == 0 &&
- event->name != NULL && strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
- char syspath[UTIL_PATH_SIZE];
- char *pos;
-
- err = rename_netif(event);
- if (err == 0) {
- info(event->udev, "renamed netif to '%s'\n", event->name);
-
- /* 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 */
- util_strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev));
- pos = strrchr(syspath, '/');
- if (pos != NULL) {
- pos++;
- util_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));
- info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
- }
- }
- }
-
- if (major(udev_device_get_devnum(dev)) > 0) {
- /* 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->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;
- }
- }
-
- udev_node_add(dev, event->mode, event->uid, event->gid);
- }
-
- /* 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_usec());
-
- /* (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;
- }
-out:
- return err;
-}
-
-int udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask)
-{
- struct udev_list_entry *list_entry;
- int err = 0;
-
- dbg(event->udev, "executing run list\n");
- udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
- const char *cmd = udev_list_entry_get_name(list_entry);
-
- if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
- struct udev_monitor *monitor;
-
- monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
- if (monitor == NULL)
- continue;
- udev_monitor_send_device(monitor, NULL, event->dev);
- udev_monitor_unref(monitor);
- } else {
- char program[UTIL_PATH_SIZE];
- char **envp;
-
- if (event->exec_delay > 0) {
- info(event->udev, "delay execution of '%s'\n", program);
- sleep(event->exec_delay);
- }
-
- udev_event_apply_format(event, cmd, program, sizeof(program));
- envp = udev_device_get_properties_envp(event->dev);
- if (udev_event_spawn(event, program, envp, sigmask, NULL, 0) < 0) {
- if (udev_list_entry_get_num(list_entry))
- err = -1;
- }
- }
- }
- return err;
-}
~ianmdlvl / elogind.git / blobdiff