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Systemd/src/udev/udev-event.c

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/* SPDX-License-Identifier: GPL-2.0+ */
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "sd-event.h"
#include "alloc-util.h"
#include "device-private.h"
#include "device-util.h"
#include "fd-util.h"
#include "format-util.h"
#include "libudev-private.h"
#include "netlink-util.h"
#include "path-util.h"
#include "process-util.h"
#include "signal-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "udev-builtin.h"
#include "udev-node.h"
#include "udev-watch.h"
#include "udev.h"
typedef struct Spawn {
const char *cmd;
pid_t pid;
usec_t timeout_warn_usec;
usec_t timeout_usec;
usec_t event_birth_usec;
bool accept_failure;
int fd_stdout;
int fd_stderr;
char *result;
size_t result_size;
size_t result_len;
} Spawn;
struct udev_event *udev_event_new(sd_device *dev, usec_t exec_delay_usec, sd_netlink *rtnl) {
struct udev_event *event;
assert(dev);
event = new(struct udev_event, 1);
if (!event)
return NULL;
*event = (struct udev_event) {
.dev = sd_device_ref(dev),
.birth_usec = now(CLOCK_MONOTONIC),
.exec_delay_usec = exec_delay_usec,
.rtnl = sd_netlink_ref(rtnl),
};
return event;
}
struct udev_event *udev_event_free(struct udev_event *event) {
void *p;
if (!event)
return NULL;
sd_device_unref(event->dev);
sd_device_unref(event->dev_db_clone);
sd_netlink_unref(event->rtnl);
while ((p = hashmap_steal_first_key(event->run_list)))
free(p);
hashmap_free(event->run_list);
hashmap_free_free_free(event->seclabel_list);
free(event->program_result);
free(event->name);
return mfree(event);
}
enum subst_type {
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,
};
struct subst_map_entry {
const char *name;
const char fmt;
enum subst_type type;
};
static const struct subst_map_entry 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 },
};
static ssize_t subst_format_var(struct udev_event *event,
const struct subst_map_entry *entry, char *attr,
char *dest, size_t l) {
sd_device *parent, *dev = event->dev;
const char *val = NULL;
char *s = dest;
dev_t devnum;
int r;
assert(entry);
switch (entry->type) {
case SUBST_DEVPATH:
r = sd_device_get_devpath(dev, &val);
if (r < 0)
return r;
l = strpcpy(&s, l, val);
break;
case SUBST_KERNEL:
r = sd_device_get_sysname(dev, &val);
if (r < 0)
return r;
l = strpcpy(&s, l, val);
break;
case SUBST_KERNEL_NUMBER:
r = sd_device_get_sysnum(dev, &val);
if (r < 0)
return r == -ENOENT ? 0 : r;
l = strpcpy(&s, l, val);
break;
case SUBST_ID:
if (!event->dev_parent)
return 0;
r = sd_device_get_sysname(event->dev_parent, &val);
if (r < 0)
return r;
l = strpcpy(&s, l, val);
break;
case SUBST_DRIVER:
if (!event->dev_parent)
return 0;
r = sd_device_get_driver(event->dev_parent, &val);
if (r < 0)
return r == -ENOENT ? 0 : r;
l = strpcpy(&s, l, val);
break;
case SUBST_MAJOR:
case SUBST_MINOR: {
char buf[DECIMAL_STR_MAX(unsigned)];
r = sd_device_get_devnum(dev, &devnum);
if (r < 0 && r != -ENOENT)
return r;
xsprintf(buf, "%u", r < 0 ? 0 : entry->type == SUBST_MAJOR ? major(devnum) : minor(devnum));
l = strpcpy(&s, l, buf);
break;
}
case SUBST_RESULT: {
char *rest;
int i;
if (!event->program_result)
return 0;
/* get part of the result string */
i = 0;
if (attr)
i = strtoul(attr, &rest, 10);
if (i > 0) {
char result[UTIL_PATH_SIZE], tmp[UTIL_PATH_SIZE], *cpos;
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 (cpos[0] == '\0')
break;
}
if (i > 0) {
log_error("requested part of result string not found");
break;
}
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 = strpcpy(&s, l, tmp);
} else
l = strpcpy(&s, l, event->program_result);
break;
}
case SUBST_ATTR: {
char vbuf[UTIL_NAME_SIZE];
size_t len;
int count;
if (!attr)
return -EINVAL;
/* try to read the value specified by "[dmi/id]product_name" */
if (util_resolve_subsys_kernel(attr, vbuf, sizeof(vbuf), 1) == 0)
val = vbuf;
/* try to read the attribute the device */
if (!val)
(void) sd_device_get_sysattr_value(dev, attr, &val);
/* try to read the attribute of the parent device, other matches have selected */
if (!val && event->dev_parent && event->dev_parent != dev)
(void) sd_device_get_sysattr_value(event->dev_parent, attr, &val);
if (!val)
return 0;
/* strip trailing whitespace, and replace unwanted characters */
if (val != vbuf)
strscpy(vbuf, sizeof(vbuf), val);
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_device_debug(dev, "%i character(s) replaced", count);
l = strpcpy(&s, l, vbuf);
break;
}
case SUBST_PARENT:
r = sd_device_get_parent(dev, &parent);
if (r < 0)
return r == -ENODEV ? 0 : r;
r = sd_device_get_devname(parent, &val);
if (r < 0)
return r == -ENOENT ? 0 : r;
l = strpcpy(&s, l, val + STRLEN("/dev/"));
break;
case SUBST_DEVNODE:
r = sd_device_get_devname(dev, &val);
if (r < 0)
return r == -ENOENT ? 0 : r;
l = strpcpy(&s, l, val);
break;
case SUBST_NAME:
if (event->name)
l = strpcpy(&s, l, event->name);
else if (sd_device_get_devname(dev, &val) >= 0)
l = strpcpy(&s, l, val + STRLEN("/dev/"));
else {
r = sd_device_get_sysname(dev, &val);
if (r < 0)
return r;
l = strpcpy(&s, l, val);
}
break;
case SUBST_LINKS:
FOREACH_DEVICE_DEVLINK(dev, val)
if (s == dest)
l = strpcpy(&s, l, val + STRLEN("/dev/"));
else
l = strpcpyl(&s, l, " ", val + STRLEN("/dev/"), NULL);
break;
case SUBST_ROOT:
l = strpcpy(&s, l, "/dev");
break;
case SUBST_SYS:
l = strpcpy(&s, l, "/sys");
break;
case SUBST_ENV:
if (!attr)
return 0;
r = sd_device_get_property_value(dev, attr, &val);
if (r < 0)
return r == -ENOENT ? 0 : r;
l = strpcpy(&s, l, val);
break;
default:
assert_not_reached("Unknown format substitution type");
}
return s - dest;
}
ssize_t udev_event_apply_format(struct udev_event *event,
const char *src, char *dest, size_t size,
bool replace_whitespace) {
const char *from;
char *s;
size_t l;
assert(event);
assert(event->dev);
assert(src);
assert(dest);
assert(size > 0);
from = src;
s = dest;
l = size;
for (;;) {
const struct subst_map_entry *entry = NULL;
char attrbuf[UTIL_PATH_SIZE], *attr;
bool format_dollar = false;
ssize_t subst_len;
while (from[0] != '\0') {
if (from[0] == '$') {
/* substitute named variable */
unsigned i;
if (from[1] == '$') {
from++;
goto copy;
}
for (i = 0; i < ELEMENTSOF(map); i++) {
if (startswith(&from[1], map[i].name)) {
entry = &map[i];
from += strlen(map[i].name)+1;
format_dollar = true;
goto subst;
}
}
} else if (from[0] == '%') {
/* substitute format char */
unsigned i;
if (from[1] == '%') {
from++;
goto copy;
}
for (i = 0; i < ELEMENTSOF(map); i++) {
if (from[1] == map[i].fmt) {
entry = &map[i];
from += 2;
goto subst;
}
}
}
copy:
/* copy char */
if (l < 2) /* need space for this char and the terminating NUL */
goto out;
s[0] = from[0];
from++;
s++;
l--;
}
goto out;
subst:
/* extract possible $format{attr} */
if (from[0] == '{') {
unsigned i;
from++;
for (i = 0; from[i] != '}'; i++)
if (from[i] == '\0') {
log_error("missing closing brace for format '%s'", src);
goto out;
}
if (i >= sizeof(attrbuf))
goto out;
memcpy(attrbuf, from, i);
attrbuf[i] = '\0';
from += i+1;
attr = attrbuf;
} else
attr = NULL;
subst_len = subst_format_var(event, entry, attr, s, l);
if (subst_len < 0) {
if (format_dollar)
log_device_warning_errno(event->dev, subst_len, "Failed to substitute variable '$%s', ignoring: %m", entry->name);
else
log_device_warning_errno(event->dev, subst_len, "Failed to apply format '%%%c', ignoring: %m", entry->fmt);
continue;
}
/* SUBST_RESULT handles spaces itself */
if (replace_whitespace && entry->type != SUBST_RESULT)
/* util_replace_whitespace can replace in-place,
* and does nothing if subst_len == 0
*/
subst_len = util_replace_whitespace(s, s, subst_len);
s += subst_len;
l -= subst_len;
}
out:
assert(l >= 1);
s[0] = '\0';
return l;
}
static int on_spawn_io(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
Spawn *spawn = userdata;
char buf[4096], *p;
size_t size;
ssize_t l;
assert(spawn);
assert(fd == spawn->fd_stdout || fd == spawn->fd_stderr);
assert(!spawn->result || spawn->result_len < spawn->result_size);
if (fd == spawn->fd_stdout && spawn->result) {
p = spawn->result + spawn->result_len;
size = spawn->result_size - spawn->result_len;
} else {
p = buf;
size = sizeof(buf);
}
l = read(fd, p, size - 1);
if (l < 0) {
if (errno != EAGAIN)
log_error_errno(errno, "Failed to read stdout of '%s': %m", spawn->cmd);
return 0;
}
p[l] = '\0';
if (fd == spawn->fd_stdout && spawn->result)
spawn->result_len += l;
/* Log output only if we watch stderr. */
if (l > 0 && spawn->fd_stderr >= 0) {
_cleanup_strv_free_ char **v = NULL;
char **q;
v = strv_split_newlines(p);
if (!v)
return 0;
STRV_FOREACH(q, v)
log_debug("'%s'(%s) '%s'", spawn->cmd,
fd == spawn->fd_stdout ? "out" : "err", *q);
}
return 0;
}
static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
Spawn *spawn = userdata;
char timeout[FORMAT_TIMESPAN_MAX];
assert(spawn);
kill_and_sigcont(spawn->pid, SIGKILL);
log_error("Spawned process '%s' ["PID_FMT"] timed out after %s, killing", spawn->cmd, spawn->pid,
format_timespan(timeout, sizeof(timeout), spawn->timeout_usec, USEC_PER_SEC));
return 1;
}
static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) {
Spawn *spawn = userdata;
char timeout[FORMAT_TIMESPAN_MAX];
assert(spawn);
log_warning("Spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", spawn->cmd, spawn->pid,
format_timespan(timeout, sizeof(timeout), spawn->timeout_warn_usec, USEC_PER_SEC));
return 1;
}
static int on_spawn_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) {
Spawn *spawn = userdata;
assert(spawn);
switch (si->si_code) {
case CLD_EXITED:
if (si->si_status == 0) {
log_debug("Process '%s' succeeded.", spawn->cmd);
sd_event_exit(sd_event_source_get_event(s), 0);
return 1;
}
log_full(spawn->accept_failure ? LOG_DEBUG : LOG_WARNING,
"Process '%s' failed with exit code %i.", spawn->cmd, si->si_status);
break;
case CLD_KILLED:
case CLD_DUMPED:
log_warning("Process '%s' terminated by signal %s.", spawn->cmd, signal_to_string(si->si_status));
break;
default:
log_error("Process '%s' failed due to unknown reason.", spawn->cmd);
}
sd_event_exit(sd_event_source_get_event(s), -EIO);
return 1;
}
static int spawn_wait(Spawn *spawn) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
int r, ret;
assert(spawn);
r = sd_event_new(&e);
if (r < 0)
return r;
if (spawn->timeout_usec > 0) {
usec_t usec, age_usec;
usec = now(CLOCK_MONOTONIC);
age_usec = usec - spawn->event_birth_usec;
if (age_usec < spawn->timeout_usec) {
if (spawn->timeout_warn_usec > 0 &&
spawn->timeout_warn_usec < spawn->timeout_usec &&
spawn->timeout_warn_usec > age_usec) {
spawn->timeout_warn_usec -= age_usec;
r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC,
usec + spawn->timeout_warn_usec, USEC_PER_SEC,
on_spawn_timeout_warning, spawn);
if (r < 0)
return r;
}
spawn->timeout_usec -= age_usec;
r = sd_event_add_time(e, NULL, CLOCK_MONOTONIC,
usec + spawn->timeout_usec, USEC_PER_SEC, on_spawn_timeout, spawn);
if (r < 0)
return r;
}
}
r = sd_event_add_io(e, NULL, spawn->fd_stdout, EPOLLIN, on_spawn_io, spawn);
if (r < 0)
return r;
r = sd_event_add_io(e, NULL, spawn->fd_stderr, EPOLLIN, on_spawn_io, spawn);
if (r < 0)
return r;
r = sd_event_add_child(e, NULL, spawn->pid, WEXITED, on_spawn_sigchld, spawn);
if (r < 0)
return r;
r = sd_event_loop(e);
if (r < 0)
return r;
r = sd_event_get_exit_code(e, &ret);
if (r < 0)
return r;
return ret;
}
int udev_event_spawn(struct udev_event *event,
usec_t timeout_usec,
bool accept_failure,
const char *cmd,
char *result, size_t ressize) {
_cleanup_close_pair_ int outpipe[2] = {-1, -1}, errpipe[2] = {-1, -1};
_cleanup_strv_free_ char **argv = NULL;
char **envp = NULL;
Spawn spawn;
pid_t pid;
int r;
assert(event);
assert(event->dev);
assert(result || ressize == 0);
/* pipes from child to parent */
if (result || log_get_max_level() >= LOG_INFO)
if (pipe2(outpipe, O_NONBLOCK|O_CLOEXEC) != 0)
return log_error_errno(errno, "Failed to create pipe for command '%s': %m", cmd);
if (log_get_max_level() >= LOG_INFO)
if (pipe2(errpipe, O_NONBLOCK|O_CLOEXEC) != 0)
return log_error_errno(errno, "Failed to create pipe for command '%s': %m", cmd);
argv = strv_split_full(cmd, NULL, SPLIT_QUOTES|SPLIT_RELAX);
if (!argv)
return log_oom();
if (isempty(argv[0])) {
log_error("Invalid command '%s'", cmd);
return -EINVAL;
}
/* allow programs in /usr/lib/udev/ to be called without the path */
if (!path_is_absolute(argv[0])) {
char *program;
program = path_join(NULL, UDEVLIBEXECDIR, argv[0]);
if (!program)
return log_oom();
free_and_replace(argv[0], program);
}
r = device_get_properties_strv(event->dev, &envp);
if (r < 0)
return log_device_error_errno(event->dev, r, "Failed to get device properties");
log_debug("Starting '%s'", cmd);
r = safe_fork("(spawn)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid);
if (r < 0)
return log_error_errno(r, "Failed to fork() to execute command '%s': %m", cmd);
if (r == 0) {
if (rearrange_stdio(-1, outpipe[WRITE_END], errpipe[WRITE_END]) < 0)
_exit(EXIT_FAILURE);
(void) close_all_fds(NULL, 0);
execve(argv[0], argv, envp);
_exit(EXIT_FAILURE);
}
/* parent closed child's ends of pipes */
outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]);
errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]);
spawn = (Spawn) {
.cmd = cmd,
.pid = pid,
.accept_failure = accept_failure,
.timeout_warn_usec = udev_warn_timeout(timeout_usec),
.timeout_usec = timeout_usec,
.event_birth_usec = event->birth_usec,
.fd_stdout = outpipe[READ_END],
.fd_stderr = errpipe[READ_END],
.result = result,
.result_size = ressize,
};
r = spawn_wait(&spawn);
if (r < 0)
return log_error_errno(r, "Failed to wait spawned command '%s': %m", cmd);
if (result)
result[spawn.result_len] = '\0';
return r;
}
static int rename_netif(struct udev_event *event) {
sd_device *dev = event->dev;
const char *action, *oldname;
char name[IFNAMSIZ];
int ifindex, r;
if (!event->name)
return 0; /* No new name is requested. */
r = sd_device_get_sysname(dev, &oldname);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get sysname: %m");
if (streq(event->name, oldname))
return 0; /* The interface name is already requested name. */
r = sd_device_get_property_value(dev, "ACTION", &action);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m");
if (!streq(action, "add"))
return 0; /* Rename the interface only when it is added. */
r = sd_device_get_ifindex(dev, &ifindex);
if (r == -ENOENT)
return 0; /* Device is not a network interface. */
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get ifindex: %m");
strscpy(name, IFNAMSIZ, event->name);
r = rtnl_set_link_name(&event->rtnl, ifindex, name);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to rename network interface %i from '%s' to '%s': %m", ifindex, oldname, name);
r = device_rename(dev, event->name);
if (r < 0)
return log_warning_errno(r, "Network interface %i is renamed from '%s' to '%s', but could not update sd_device object: %m", ifindex, oldname, name);
log_device_debug(dev, "Network interface %i is renamed from '%s' to '%s'", ifindex, oldname, name);
return 1;
}
static int update_devnode(struct udev_event *event) {
sd_device *dev = event->dev;
const char *action;
bool apply;
int r;
r = sd_device_get_devnum(dev, NULL);
if (r == -ENOENT)
return 0;
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get devnum: %m");
/* remove/update possible left-over symlinks from old database entry */
if (event->dev_db_clone)
(void) udev_node_update_old_links(dev, event->dev_db_clone);
if (!event->owner_set) {
r = device_get_devnode_uid(dev, &event->uid);
if (r < 0 && r != -ENOENT)
return log_device_error_errno(dev, r, "Failed to get devnode UID: %m");
}
if (!event->group_set) {
r = device_get_devnode_gid(dev, &event->gid);
if (r < 0 && r != -ENOENT)
return log_device_error_errno(dev, r, "Failed to get devnode GID: %m");
}
if (!event->mode_set) {
r = device_get_devnode_mode(dev, &event->mode);
if (r < 0 && r != -ENOENT)
return log_device_error_errno(dev, r, "Failed to get devnode mode: %m");
if (r == -ENOENT) {
if (event->gid > 0)
/* default 0660 if a group is assigned */
event->mode = 0660;
else
/* default 0600 */
event->mode = 0600;
}
}
r = sd_device_get_property_value(dev, "ACTION", &action);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m");
apply = streq(action, "add") || event->owner_set || event->group_set || event->mode_set;
return udev_node_add(dev, apply, event->mode, event->uid, event->gid, event->seclabel_list);
}
static void event_execute_rules_on_remove(
struct udev_event *event,
usec_t timeout_usec,
Hashmap *properties_list,
struct udev_rules *rules) {
sd_device *dev = event->dev;
int r;
r = device_read_db_force(dev);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to read database under /run/udev/data/: %m");
r = device_tag_index(dev, NULL, false);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to remove corresponding tag files under /run/udev/tag/, ignoring: %m");
r = device_delete_db(dev);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to delete database under /run/udev/data/, ignoring: %m");
if (sd_device_get_devnum(dev, NULL) >= 0)
(void) udev_watch_end(dev);
(void) udev_rules_apply_to_event(rules, event, timeout_usec, properties_list);
if (sd_device_get_devnum(dev, NULL) >= 0)
(void) udev_node_remove(dev);
}
int udev_event_execute_rules(struct udev_event *event,
usec_t timeout_usec,
Hashmap *properties_list,
struct udev_rules *rules) {
sd_device *dev = event->dev;
const char *subsystem, *action;
int r;
assert(event);
assert(rules);
r = sd_device_get_subsystem(dev, &subsystem);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get subsystem: %m");
r = sd_device_get_property_value(dev, "ACTION", &action);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get property 'ACTION': %m");
if (streq(action, "remove")) {
event_execute_rules_on_remove(event, timeout_usec, properties_list, rules);
return 0;
}
r = device_clone_with_db(dev, &event->dev_db_clone);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to clone sd_device object, ignoring: %m");
if (event->dev_db_clone) {
r = sd_device_get_devnum(dev, NULL);
if (r < 0) {
if (r != -ENOENT)
log_device_debug_errno(dev, r, "Failed to get devnum, ignoring: %m");
if (streq(action, "move")) {
r = device_copy_properties(dev, event->dev_db_clone);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to copy properties from cloned device, ignoring: %m");
}
} else
/* Disable watch during event processing. */
(void) udev_watch_end(event->dev_db_clone);
}
(void) udev_rules_apply_to_event(rules, event, timeout_usec, properties_list);
(void) rename_netif(event);
(void) update_devnode(event);
/* preserve old, or get new initialization timestamp */
r = device_ensure_usec_initialized(dev, event->dev_db_clone);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to set initialization timestamp, ignoring: %m");
/* (re)write database file */
r = device_tag_index(dev, event->dev_db_clone, true);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to update tags under /run/udev/tag/, ignoring: %m");
r = device_update_db(dev);
if (r < 0)
log_device_debug_errno(dev, r, "Failed to update database under /run/udev/data/, ignoring: %m");
device_set_is_initialized(dev);
event->dev_db_clone = sd_device_unref(event->dev_db_clone);
return 0;
}
void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec) {
const char *cmd;
void *val;
Iterator i;
HASHMAP_FOREACH_KEY(val, cmd, event->run_list, i) {
enum udev_builtin_cmd builtin_cmd = PTR_TO_INT(val);
char command[UTIL_PATH_SIZE];
udev_event_apply_format(event, cmd, command, sizeof(command), false);
if (builtin_cmd >= 0 && builtin_cmd < _UDEV_BUILTIN_MAX)
udev_builtin_run(event->dev, builtin_cmd, command, false);
else {
if (event->exec_delay_usec > 0) {
log_debug("delay execution of '%s'", command);
(void) usleep(event->exec_delay_usec);
}
udev_event_spawn(event, timeout_usec, false, command, NULL, 0);
}
}
}
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