From 41b7beb7404c134820870ab21ae0242dfc749b2c Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Wed, 26 Oct 2016 22:49:41 -0400 Subject: ./tools/notsd-move --- src/grp-udev/libudev-core/udev-event.c | 943 +++++++++++++++++++++++++++++++++ 1 file changed, 943 insertions(+) create mode 100644 src/grp-udev/libudev-core/udev-event.c (limited to 'src/grp-udev/libudev-core/udev-event.c') diff --git a/src/grp-udev/libudev-core/udev-event.c b/src/grp-udev/libudev-core/udev-event.c new file mode 100644 index 0000000000..f553b8b73d --- /dev/null +++ b/src/grp-udev/libudev-core/udev-event.c @@ -0,0 +1,943 @@ +/* + * Copyright (C) 2003-2013 Kay Sievers + * + * 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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sd-netlink/netlink-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/process-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/string-util.h" +#include "udev.h" + +typedef struct Spawn { + const char *cmd; + pid_t pid; + usec_t timeout_warn; + usec_t timeout; + bool accept_failure; +} Spawn; + +struct udev_event *udev_event_new(struct udev_device *dev) { + struct udev *udev = udev_device_get_udev(dev); + struct udev_event *event; + + event = new0(struct udev_event, 1); + if (event == NULL) + return NULL; + event->dev = dev; + event->udev = udev; + udev_list_init(udev, &event->run_list, false); + udev_list_init(udev, &event->seclabel_list, false); + event->birth_usec = clock_boottime_or_monotonic(); + return event; +} + +void udev_event_unref(struct udev_event *event) { + if (event == NULL) + return; + sd_netlink_unref(event->rtnl); + udev_list_cleanup(&event->run_list); + udev_list_cleanup(&event->seclabel_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 { + const char *name; + const 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; + + assert(dev); + + 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 < ELEMENTSOF(map); i++) { + if (startswith(&from[1], map[i].name)) { + 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 < ELEMENTSOF(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'", 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 = strpcpy(&s, l, udev_device_get_devpath(dev)); + break; + case SUBST_KERNEL: + l = strpcpy(&s, l, udev_device_get_sysname(dev)); + break; + case SUBST_KERNEL_NUMBER: + if (udev_device_get_sysnum(dev) == NULL) + break; + l = strpcpy(&s, l, udev_device_get_sysnum(dev)); + break; + case SUBST_ID: + if (event->dev_parent == NULL) + break; + l = 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 = strpcpy(&s, l, driver); + break; + } + case SUBST_MAJOR: { + char num[UTIL_PATH_SIZE]; + + sprintf(num, "%u", major(udev_device_get_devnum(dev))); + l = strpcpy(&s, l, num); + break; + } + case SUBST_MINOR: { + char num[UTIL_PATH_SIZE]; + + sprintf(num, "%u", minor(udev_device_get_devnum(dev))); + l = strpcpy(&s, l, num); + break; + } + case SUBST_RESULT: { + char *rest; + int i; + + if (event->program_result == NULL) + break; + /* get 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; + + 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: { + const char *value = NULL; + char vbuf[UTIL_NAME_SIZE]; + size_t len; + int count; + + if (attr == NULL) { + log_error("missing file parameter for attr"); + 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) + 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" , count); + l = 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) + l = strpcpy(&s, l, devnode + strlen("/dev/")); + break; + } + case SUBST_DEVNODE: + if (udev_device_get_devnode(dev) != NULL) + l = strpcpy(&s, l, udev_device_get_devnode(dev)); + break; + case SUBST_NAME: + if (event->name != NULL) + l = strpcpy(&s, l, event->name); + else if (udev_device_get_devnode(dev) != NULL) + l = strpcpy(&s, l, udev_device_get_devnode(dev) + strlen("/dev/")); + else + l = strpcpy(&s, l, udev_device_get_sysname(dev)); + break; + case SUBST_LINKS: { + struct udev_list_entry *list_entry; + + list_entry = udev_device_get_devlinks_list_entry(dev); + if (list_entry == NULL) + break; + l = strpcpy(&s, l, udev_list_entry_get_name(list_entry) + strlen("/dev/")); + udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) + l = strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry) + 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 == NULL) { + break; + } else { + const char *value; + + value = udev_device_get_property_value(event->dev, attr); + if (value == NULL) + break; + l = strpcpy(&s, l, value); + break; + } + default: + log_error("unknown substitution type=%i", type); + break; + } + } + +out: + s[0] = '\0'; + return l; +} + +static int spawn_exec(struct udev_event *event, + const char *cmd, char *const argv[], char **envp, + int fd_stdout, int fd_stderr) { + _cleanup_close_ int fd = -1; + int r; + + /* discard child output or connect to pipe */ + fd = open("/dev/null", O_RDWR); + if (fd >= 0) { + r = dup2(fd, STDIN_FILENO); + if (r < 0) + log_warning_errno(errno, "redirecting stdin failed: %m"); + + if (fd_stdout < 0) { + r = dup2(fd, STDOUT_FILENO); + if (r < 0) + log_warning_errno(errno, "redirecting stdout failed: %m"); + } + + if (fd_stderr < 0) { + r = dup2(fd, STDERR_FILENO); + if (r < 0) + log_warning_errno(errno, "redirecting stderr failed: %m"); + } + } else + log_warning_errno(errno, "open /dev/null failed: %m"); + + /* connect pipes to std{out,err} */ + if (fd_stdout >= 0) { + r = dup2(fd_stdout, STDOUT_FILENO); + if (r < 0) + log_warning_errno(errno, "redirecting stdout failed: %m"); + + fd_stdout = safe_close(fd_stdout); + } + + if (fd_stderr >= 0) { + r = dup2(fd_stderr, STDERR_FILENO); + if (r < 0) + log_warning_errno(errno, "redirecting stdout failed: %m"); + + fd_stderr = safe_close(fd_stderr); + } + + /* terminate child in case parent goes away */ + prctl(PR_SET_PDEATHSIG, SIGTERM); + + /* restore sigmask before exec */ + (void) reset_signal_mask(); + + execve(argv[0], argv, envp); + + /* exec failed */ + return log_error_errno(errno, "failed to execute '%s' '%s': %m", argv[0], cmd); +} + +static void spawn_read(struct udev_event *event, + usec_t timeout_usec, + const char *cmd, + int fd_stdout, int fd_stderr, + char *result, size_t ressize) { + _cleanup_close_ int fd_ep = -1; + struct epoll_event ep_outpipe = { + .events = EPOLLIN, + .data.ptr = &fd_stdout, + }; + struct epoll_event ep_errpipe = { + .events = EPOLLIN, + .data.ptr = &fd_stderr, + }; + size_t respos = 0; + int r; + + /* 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_errno(errno, "error creating epoll fd: %m"); + return; + } + + if (fd_stdout >= 0) { + r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe); + if (r < 0) { + log_error_errno(errno, "fail to add stdout fd to epoll: %m"); + return; + } + } + + if (fd_stderr >= 0) { + r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe); + if (r < 0) { + log_error_errno(errno, "fail to add stderr fd to epoll: %m"); + return; + } + } + + /* read child output */ + while (fd_stdout >= 0 || fd_stderr >= 0) { + int timeout; + int fdcount; + struct epoll_event ev[4]; + int i; + + if (timeout_usec > 0) { + usec_t age_usec; + + age_usec = clock_boottime_or_monotonic() - event->birth_usec; + if (age_usec >= timeout_usec) { + log_error("timeout '%s'", cmd); + return; + } + timeout = ((timeout_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC; + } else { + timeout = -1; + } + + fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout); + if (fdcount < 0) { + if (errno == EINTR) + continue; + log_error_errno(errno, "failed to poll: %m"); + return; + } else if (fdcount == 0) { + log_error("timeout '%s'", cmd); + return; + } + + for (i = 0; i < fdcount; i++) { + int *fd = (int *)ev[i].data.ptr; + + if (*fd < 0) + continue; + + 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 %zu too short", 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'", cmd, *fd == fd_stdout ? "out" : "err" , line); + } + } + } else if (ev[i].events & EPOLLHUP) { + r = epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL); + if (r < 0) { + log_error_errno(errno, "failed to remove fd from epoll: %m"); + return; + } + *fd = -1; + } + } + } + + /* return the child's stdout string */ + if (result != NULL) + result[respos] = '\0'; +} + +static int on_spawn_timeout(sd_event_source *s, uint64_t usec, void *userdata) { + Spawn *spawn = userdata; + char timeout[FORMAT_TIMESTAMP_RELATIVE_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_timestamp_relative(timeout, sizeof(timeout), spawn->timeout)); + + return 1; +} + +static int on_spawn_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { + Spawn *spawn = userdata; + char timeout[FORMAT_TIMESTAMP_RELATIVE_MAX]; + + assert(spawn); + + log_warning("spawned process '%s' ["PID_FMT"] is taking longer than %s to complete", spawn->cmd, spawn->pid, + format_timestamp_relative(timeout, sizeof(timeout), spawn->timeout)); + + 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; + } else if (spawn->accept_failure) + log_debug("Process '%s' failed with exit code %i.", spawn->cmd, si->si_status); + else + 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(struct udev_event *event, + usec_t timeout_usec, + usec_t timeout_warn_usec, + const char *cmd, pid_t pid, + bool accept_failure) { + Spawn spawn = { + .cmd = cmd, + .pid = pid, + .accept_failure = accept_failure, + }; + _cleanup_(sd_event_unrefp) sd_event *e = NULL; + int r, ret; + + r = sd_event_new(&e); + if (r < 0) + return r; + + if (timeout_usec > 0) { + usec_t usec, age_usec; + + usec = now(clock_boottime_or_monotonic()); + age_usec = usec - event->birth_usec; + if (age_usec < timeout_usec) { + if (timeout_warn_usec > 0 && timeout_warn_usec < timeout_usec && age_usec < timeout_warn_usec) { + spawn.timeout_warn = timeout_warn_usec - age_usec; + + r = sd_event_add_time(e, NULL, clock_boottime_or_monotonic(), + usec + spawn.timeout_warn, USEC_PER_SEC, + on_spawn_timeout_warning, &spawn); + if (r < 0) + return r; + } + + spawn.timeout = timeout_usec - age_usec; + + r = sd_event_add_time(e, NULL, clock_boottime_or_monotonic(), + usec + spawn.timeout, USEC_PER_SEC, on_spawn_timeout, &spawn); + if (r < 0) + return r; + } + } + + r = sd_event_add_child(e, NULL, 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_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]) { + int i = 0; + char *pos; + + if (strchr(cmd, ' ') == NULL) { + argv[i++] = cmd; + goto out; + } + + pos = cmd; + while (pos != NULL && pos[0] != '\0') { + if (pos[0] == '\'') { + /* do not separate quotes */ + pos++; + argv[i] = strsep(&pos, "\'"); + if (pos != NULL) + while (pos[0] == ' ') + pos++; + } else { + argv[i] = strsep(&pos, " "); + if (pos != NULL) + while (pos[0] == ' ') + pos++; + } + i++; + } +out: + argv[i] = NULL; + if (argc) + *argc = i; + return 0; +} + +int udev_event_spawn(struct udev_event *event, + usec_t timeout_usec, + usec_t timeout_warn_usec, + bool accept_failure, + const char *cmd, + char *result, size_t ressize) { + int outpipe[2] = {-1, -1}; + int errpipe[2] = {-1, -1}; + pid_t pid; + int err = 0; + + /* pipes from child to parent */ + if (result != NULL || log_get_max_level() >= LOG_INFO) { + if (pipe2(outpipe, O_NONBLOCK) != 0) { + err = log_error_errno(errno, "pipe failed: %m"); + goto out; + } + } + if (log_get_max_level() >= LOG_INFO) { + if (pipe2(errpipe, O_NONBLOCK) != 0) { + err = log_error_errno(errno, "pipe failed: %m"); + goto out; + } + } + + pid = fork(); + switch(pid) { + case 0: + { + char arg[UTIL_PATH_SIZE]; + char *argv[128]; + char program[UTIL_PATH_SIZE]; + + /* child closes parent's ends of pipes */ + outpipe[READ_END] = safe_close(outpipe[READ_END]); + errpipe[READ_END] = safe_close(errpipe[READ_END]); + + strscpy(arg, sizeof(arg), cmd); + udev_build_argv(event->udev, arg, NULL, argv); + + /* allow programs in /usr/lib/udev/ to be called without the path */ + if (argv[0][0] != '/') { + strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL); + argv[0] = program; + } + + log_debug("starting '%s'", cmd); + + spawn_exec(event, cmd, argv, udev_device_get_properties_envp(event->dev), + outpipe[WRITE_END], errpipe[WRITE_END]); + + _exit(2); + } + case -1: + log_error_errno(errno, "fork of '%s' failed: %m", cmd); + err = -1; + goto out; + default: + /* parent closed child's ends of pipes */ + outpipe[WRITE_END] = safe_close(outpipe[WRITE_END]); + errpipe[WRITE_END] = safe_close(errpipe[WRITE_END]); + + spawn_read(event, + timeout_usec, + cmd, + outpipe[READ_END], errpipe[READ_END], + result, ressize); + + err = spawn_wait(event, timeout_usec, timeout_warn_usec, cmd, pid, accept_failure); + } + +out: + if (outpipe[READ_END] >= 0) + close(outpipe[READ_END]); + if (outpipe[WRITE_END] >= 0) + close(outpipe[WRITE_END]); + if (errpipe[READ_END] >= 0) + close(errpipe[READ_END]); + if (errpipe[WRITE_END] >= 0) + close(errpipe[WRITE_END]); + return err; +} + +static int rename_netif(struct udev_event *event) { + struct udev_device *dev = event->dev; + char name[IFNAMSIZ]; + const char *oldname; + int r; + + oldname = udev_device_get_sysname(dev); + + strscpy(name, IFNAMSIZ, event->name); + + r = rtnl_set_link_name(&event->rtnl, udev_device_get_ifindex(dev), name); + if (r < 0) + return log_error_errno(r, "Error changing net interface name '%s' to '%s': %m", oldname, name); + + log_debug("renamed network interface '%s' to '%s'", oldname, name); + + return 0; +} + +void udev_event_execute_rules(struct udev_event *event, + usec_t timeout_usec, usec_t timeout_warn_usec, + struct udev_list *properties_list, + struct udev_rules *rules) { + struct udev_device *dev = event->dev; + + if (udev_device_get_subsystem(dev) == NULL) + return; + + if (streq(udev_device_get_action(dev), "remove")) { + udev_device_read_db(dev); + udev_device_tag_index(dev, NULL, false); + udev_device_delete_db(dev); + + if (major(udev_device_get_devnum(dev)) != 0) + udev_watch_end(event->udev, dev); + + udev_rules_apply_to_event(rules, event, + timeout_usec, timeout_warn_usec, + properties_list); + + if (major(udev_device_get_devnum(dev)) != 0) + udev_node_remove(dev); + } else { + event->dev_db = udev_device_clone_with_db(dev); + if (event->dev_db != NULL) { + /* disable watch during event processing */ + if (major(udev_device_get_devnum(dev)) != 0) + udev_watch_end(event->udev, event->dev_db); + + if (major(udev_device_get_devnum(dev)) == 0 && + streq(udev_device_get_action(dev), "move")) + udev_device_copy_properties(dev, event->dev_db); + } + + udev_rules_apply_to_event(rules, event, + timeout_usec, timeout_warn_usec, + properties_list); + + /* rename a new network interface, if needed */ + if (udev_device_get_ifindex(dev) > 0 && streq(udev_device_get_action(dev), "add") && + event->name != NULL && !streq(event->name, udev_device_get_sysname(dev))) { + int r; + + r = rename_netif(event); + if (r < 0) + log_warning_errno(r, "could not rename interface '%d' from '%s' to '%s': %m", udev_device_get_ifindex(dev), + udev_device_get_sysname(dev), event->name); + else { + r = udev_device_rename(dev, event->name); + if (r < 0) + log_warning_errno(r, "renamed interface '%d' from '%s' to '%s', but could not update udev_device: %m", + udev_device_get_ifindex(dev), udev_device_get_sysname(dev), event->name); + else + log_debug("changed devpath to '%s'", udev_device_get_devpath(dev)); + } + } + + if (major(udev_device_get_devnum(dev)) > 0) { + bool apply; + + /* remove/update possible left-over symlinks from old database entry */ + if (event->dev_db != NULL) + udev_node_update_old_links(dev, event->dev_db); + + if (!event->owner_set) + event->uid = udev_device_get_devnode_uid(dev); + + if (!event->group_set) + event->gid = udev_device_get_devnode_gid(dev); + + if (!event->mode_set) { + if (udev_device_get_devnode_mode(dev) > 0) { + /* kernel supplied value */ + event->mode = udev_device_get_devnode_mode(dev); + } else if (event->gid > 0) { + /* default 0660 if a group is assigned */ + event->mode = 0660; + } else { + /* default 0600 */ + event->mode = 0600; + } + } + + apply = streq(udev_device_get_action(dev), "add") || event->owner_set || event->group_set || event->mode_set; + udev_node_add(dev, apply, event->mode, event->uid, event->gid, &event->seclabel_list); + } + + /* preserve old, or get new initialization timestamp */ + udev_device_ensure_usec_initialized(event->dev, event->dev_db); + + /* (re)write database file */ + udev_device_tag_index(dev, event->dev_db, true); + udev_device_update_db(dev); + udev_device_set_is_initialized(dev); + + event->dev_db = udev_device_unref(event->dev_db); + } +} + +void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, usec_t timeout_warn_usec) { + struct udev_list_entry *list_entry; + + udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) { + char command[UTIL_PATH_SIZE]; + const char *cmd = udev_list_entry_get_name(list_entry); + enum udev_builtin_cmd builtin_cmd = udev_list_entry_get_num(list_entry); + + udev_event_apply_format(event, cmd, command, sizeof(command)); + + if (builtin_cmd < UDEV_BUILTIN_MAX) + udev_builtin_run(event->dev, builtin_cmd, command, false); + else { + if (event->exec_delay > 0) { + log_debug("delay execution of '%s'", command); + sleep(event->exec_delay); + } + + udev_event_spawn(event, timeout_usec, timeout_warn_usec, false, command, NULL, 0); + } + } +} -- cgit v1.2.3-54-g00ecf