#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;

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);

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;

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;

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') {

log_error("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));

break;

case SUBST_KERNEL:

l = util_strpcpy(&s, l, 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));

break;

case SUBST_ID:

if (event->dev_parent == NULL)

break;

l = util_strpcpy(&s, l, 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);

break;

}

case SUBST_MAJOR: {

char num[UTIL_PATH_SIZE];

sprintf(num, "%d", major(udev_device_get_devnum(dev)));

l = util_strpcpy(&s, l, 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);

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;

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) {

log_error("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);

} else {

l = util_strpcpy(&s, l, event->program_result);

}

break;

}

case SUBST_ATTR: {

const char *value = NULL;

char vbuf[UTIL_NAME_SIZE];

size_t len;

int count;

if (attr == NULL) {

log_error("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)

log_debug("%i character(s) replaced\n" , count);

l = util_strpcpy(&s, l, 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]);

}

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);

} 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]);

} else {

l = util_strpcpy(&s, l, 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));

break;

case SUBST_SYS:

l = util_strpcpy(&s, l, udev_get_sys_path(event->udev));

break;

case SUBST_ENV:

if (attr == NULL) {

break;

} else {

const char *value;

value = udev_device_get_property_value(event->dev, attr);

if (value == NULL)

break;

l = util_strpcpy(&s, l, value);

break;

}

default:

log_error("unknown substitution type=%i\n", type);

break;

}

}

out:

s[0] = '\0';

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 {

log_error("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;

log_error("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) {

log_error("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) {

log_error("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) {

log_error("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) {

log_error("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;

log_error("failed to poll: %m\n");

goto out;

}

if (fdcount == 0) {

log_error("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 {

log_error("'%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')

log_debug("'%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) {

log_error("failed to remove fd from epoll: %m\n");

goto out;

}

*fd = -1;

}

}

}

/* return the child's stdout string */

if (result != NULL)

result[respos] = '\0';

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;

log_error("failed to poll: %m\n");

goto out;

}

if (fdcount == 0) {

log_error("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)) {

log_debug("'%s' [%u] exit with return code %i\n", cmd, pid, WEXITSTATUS(status));

if (WEXITSTATUS(status) != 0)

err = -1;

} else if (WIFSIGNALED(status)) {

log_error("'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status)));

err = -1;

} else if (WIFSTOPPED(status)) {

log_error("'%s' [%u] stopped\n", cmd, pid);

err = -1;

} else if (WIFCONTINUED(status)) {

log_error("'%s' [%u] continued\n", cmd, pid);

err = -1;

} else {

log_error("'%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++;

}

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;

log_error("pipe failed: %m\n");

goto out;

}

}

if (udev_get_log_priority(udev) >= LOG_INFO) {

if (pipe2(errpipe, O_NONBLOCK) != 0) {

err = -errno;

log_error("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), 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'\n", cmd);

err = spawn_exec(event, cmd, argv, envp, sigmask,

outpipe[WRITE_END], errpipe[WRITE_END]);

_exit(2 );

case -1:

log_error("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;

log_debug("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;

log_error("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 };

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)

log_error("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) {

log_debug("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));

log_debug("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;

}

void udev_event_execute_run(struct udev_event *event, 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'\n", 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, program, envp, sigmask, NULL, 0);

}

}

}