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-rw-r--r--src/udev/udev-event.c893
1 files changed, 893 insertions, 0 deletions
diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
new file mode 100644
index 0000000..07b7365
--- /dev/null
+++ b/src/udev/udev-event.c
@@ -0,0 +1,893 @@
+/* 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-util.h"
+#include "netlink-util.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "rlimit-util.h"
+#include "signal-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "strxcpyx.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;
+
+UdevEvent *udev_event_new(sd_device *dev, usec_t exec_delay_usec, sd_netlink *rtnl) {
+ UdevEvent *event;
+
+ assert(dev);
+
+ event = new(UdevEvent, 1);
+ if (!event)
+ return NULL;
+
+ *event = (UdevEvent) {
+ .dev = sd_device_ref(dev),
+ .birth_usec = now(CLOCK_MONOTONIC),
+ .exec_delay_usec = exec_delay_usec,
+ .rtnl = sd_netlink_ref(rtnl),
+ };
+
+ return event;
+}
+
+UdevEvent *udev_event_free(UdevEvent *event) {
+ if (!event)
+ return NULL;
+
+ sd_device_unref(event->dev);
+ sd_device_unref(event->dev_db_clone);
+ sd_netlink_unref(event->rtnl);
+ hashmap_free_free_key(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(UdevEvent *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), true) == 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(UdevEvent *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;
+ int ret = -EIO;
+
+ assert(spawn);
+
+ switch (si->si_code) {
+ case CLD_EXITED:
+ if (si->si_status == 0)
+ log_debug("Process '%s' succeeded.", spawn->cmd);
+ else
+ log_full(spawn->accept_failure ? LOG_DEBUG : LOG_WARNING,
+ "Process '%s' failed with exit code %i.", spawn->cmd, si->si_status);
+ ret = si->si_status;
+ break;
+ case CLD_KILLED:
+ case CLD_DUMPED:
+ log_error("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), ret);
+ return 1;
+}
+
+static int spawn_wait(Spawn *spawn) {
+ _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+ int r;
+
+ 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;
+ }
+ }
+
+ if (spawn->fd_stdout >= 0) {
+ r = sd_event_add_io(e, NULL, spawn->fd_stdout, EPOLLIN, on_spawn_io, spawn);
+ if (r < 0)
+ return r;
+ }
+
+ if (spawn->fd_stderr >= 0) {
+ 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;
+
+ return sd_event_loop(e);
+}
+
+int udev_event_spawn(UdevEvent *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]))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Invalid command '%s'", cmd);
+
+ /* allow programs in /usr/lib/udev/ to be called without the path */
+ if (!path_is_absolute(argv[0])) {
+ char *program;
+
+ program = path_join(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);
+ (void) rlimit_nofile_safe();
+
+ 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 for spawned command '%s': %m", cmd);
+
+ if (result)
+ result[spawn.result_len] = '\0';
+
+ return r; /* 0 for success, and positive if the program failed */
+}
+
+static int rename_netif(UdevEvent *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(UdevEvent *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(
+ UdevEvent *event,
+ usec_t timeout_usec,
+ Hashmap *properties_list,
+ UdevRules *rules) {
+
+ sd_device *dev = event->dev;
+ int r;
+
+ r = device_read_db_internal(dev, true);
+ 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(UdevEvent *event,
+ usec_t timeout_usec,
+ Hashmap *properties_list,
+ UdevRules *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(UdevEvent *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);
+ }
+
+ (void) udev_event_spawn(event, timeout_usec, false, command, NULL, 0);
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 16:26:15 +0000