X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev%2Fudevd.c;h=189ab007a491e8da5f23cdcc9a629b509f750271;hb=337d10278380ba3605f0e1e730c542ca20a817fe;hp=876d2ec1df0133f0f78c1cf847a2ceb9094ea673;hpb=adda4c682ad2c56fc091222be3bd94fa817013b9;p=elogind.git diff --git a/udev/udevd.c b/udev/udevd.c index 876d2ec1d..189ab007a 100644 --- a/udev/udevd.c +++ b/udev/udevd.c @@ -24,12 +24,14 @@ #include #include #include +#include #include #include #include #include #include #include +#include #include #include #include @@ -39,40 +41,48 @@ #include #include #include +#include #include "udev.h" #define UDEVD_PRIORITY -4 #define UDEV_PRIORITY -2 -static int debug; +static bool debug; static void log_fn(struct udev *udev, int priority, const char *file, int line, const char *fn, const char *format, va_list args) { if (debug) { - fprintf(stderr, "[%d] %s: ", (int) getpid(), fn); - vfprintf(stderr, format, args); + char buf[1024]; + struct timeval tv; + struct timezone tz; + + vsnprintf(buf, sizeof(buf), format, args); + gettimeofday(&tv, &tz); + fprintf(stderr, "%llu.%06u [%u] %s: %s", + (unsigned long long) tv.tv_sec, (unsigned int) tv.tv_usec, + (int) getpid(), fn, buf); } else { vsyslog(priority, format, args); } } -static int debug_trace; static struct udev_rules *rules; static struct udev_queue_export *udev_queue_export; static struct udev_ctrl *udev_ctrl; static struct udev_monitor *monitor; static int worker_watch[2]; static pid_t settle_pid; -static int stop_exec_queue; -static int reload_config; -static int max_childs; -static int childs; +static bool stop_exec_queue; +static bool reload_config; +static int children; +static int children_max; +static sigset_t orig_sigmask; static struct udev_list_node event_list; static struct udev_list_node worker_list; -static int udev_exit; +static bool udev_exit; static volatile sig_atomic_t worker_exit; enum poll_fd { @@ -108,6 +118,8 @@ struct event { const char *devpath; size_t devpath_len; const char *devpath_old; + dev_t devnum; + bool is_block; }; static struct event *node_to_event(struct udev_list_node *node) @@ -128,6 +140,8 @@ enum worker_state { struct worker { struct udev_list_node node; + struct udev *udev; + int refcount; pid_t pid; struct udev_monitor *monitor; enum worker_state state; @@ -154,7 +168,7 @@ static void event_queue_delete(struct event *event) udev_list_node_remove(&event->node); /* mark as failed, if "add" event returns non-zero */ - if (event->exitcode && strcmp(udev_device_get_action(event->dev), "add") == 0) + if (event->exitcode != 0 && strcmp(udev_device_get_action(event->dev), "remove") != 0) udev_queue_export_device_failed(udev_queue_export, event->dev); else udev_queue_export_device_finished(udev_queue_export, event->dev); @@ -171,14 +185,27 @@ static void event_sig_handler(int signum) _exit(1); break; case SIGTERM: - worker_exit = 1; + worker_exit = true; break; } } +static struct worker *worker_ref(struct worker *worker) +{ + worker->refcount++; + return worker; +} + static void worker_unref(struct worker *worker) { + worker->refcount--; + if (worker->refcount > 0) + return; + + udev_list_node_remove(&worker->node); udev_monitor_unref(worker->monitor); + children--; + info(worker->udev, "worker [%u] cleaned up\n", worker->pid); free(worker); } @@ -196,11 +223,13 @@ static void worker_new(struct event *event) /* allow the main daemon netlink address to send devices to the worker */ udev_monitor_allow_unicast_sender(worker_monitor, monitor); udev_monitor_enable_receiving(worker_monitor); - util_set_fd_cloexec(udev_monitor_get_fd(worker_monitor)); worker = calloc(1, sizeof(struct worker)); if (worker == NULL) return; + /* worker + event reference */ + worker->refcount = 2; + worker->udev = event->udev; pid = fork(); switch (pid) { @@ -244,9 +273,11 @@ static void worker_new(struct event *event) do { struct udev_event *udev_event; - struct worker_message msg; + struct worker_message msg = {}; int err; + int failed = 0; + info(event->udev, "seq %llu running\n", udev_device_get_seqnum(dev)); udev_event = udev_event_new(dev); if (udev_event == NULL) _exit(3); @@ -261,11 +292,9 @@ static void worker_new(struct event *event) if (udev_device_get_event_timeout(dev) >= 0) alarm(udev_device_get_event_timeout(dev)); - /* execute RUN= */ - if (err == 0 && !udev_event->ignore_device && udev_get_run(udev_event->udev)) - udev_event_execute_run(udev_event); + if (err == 0) + failed = udev_event_execute_run(udev_event, &orig_sigmask); - /* reset alarm */ alarm(0); /* apply/restore inotify watch */ @@ -277,8 +306,11 @@ static void worker_new(struct event *event) /* send processed event back to libudev listeners */ udev_monitor_send_device(worker_monitor, NULL, dev); - /* send back the result of the event execution */ - msg.exitcode = err; + /* send udevd the result of the event execution */ + if (err != 0) + msg.exitcode = err; + else if (failed != 0) + msg.exitcode = failed; msg.pid = getpid(); send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0); @@ -322,13 +354,13 @@ static void worker_new(struct event *event) worker->event = event; event->state = EVENT_RUNNING; udev_list_node_append(&worker->node, &worker_list); - childs++; + children++; info(event->udev, "seq %llu forked new worker [%u]\n", udev_device_get_seqnum(event->dev), pid); break; } } -static void event_run(struct event *event) +static void event_run(struct event *event, bool force) { struct udev_list_node *loop; @@ -339,23 +371,22 @@ static void event_run(struct event *event) if (worker->state != WORKER_IDLE) continue; - worker->event = event; - worker->state = WORKER_RUNNING; - event->state = EVENT_RUNNING; count = udev_monitor_send_device(monitor, worker->monitor, event->dev); if (count < 0) { - event->state = EVENT_QUEUED; - worker->event = NULL; err(event->udev, "worker [%u] did not accept message %zi (%m), kill it\n", worker->pid, count); - worker->state = WORKER_KILLED; kill(worker->pid, SIGKILL); + worker->state = WORKER_KILLED; continue; } + worker_ref(worker); + worker->event = event; + worker->state = WORKER_RUNNING; + event->state = EVENT_RUNNING; return; } - if (childs >= max_childs) { - info(event->udev, "maximum number (%i) of childs reached\n", childs); + if (!force && children >= children_max) { + info(event->udev, "maximum number (%i) of children reached\n", children); return; } @@ -377,6 +408,8 @@ static void event_queue_insert(struct udev_device *dev) event->devpath = udev_device_get_devpath(dev); event->devpath_len = strlen(event->devpath); event->devpath_old = udev_device_get_devpath_old(dev); + event->devnum = udev_device_get_devnum(dev); + event->is_block = (strcmp("block", udev_device_get_subsystem(dev)) == 0); udev_queue_export_device_queued(udev_queue_export, dev); info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev), @@ -387,7 +420,7 @@ static void event_queue_insert(struct udev_device *dev) /* run all events with a timeout set immediately */ if (udev_device_get_timeout(dev) > 0) { - worker_new(event); + event_run(event, true); return; } } @@ -397,10 +430,10 @@ static void worker_kill(struct udev *udev, int retain) struct udev_list_node *loop; int max; - if (childs <= retain) + if (children <= retain) return; - max = childs - retain; + max = children - retain; udev_list_node_foreach(loop, &worker_list) { struct worker *worker = node_to_worker(loop); @@ -416,31 +449,8 @@ static void worker_kill(struct udev *udev, int retain) } } -static int mem_size_mb(void) -{ - FILE *f; - char buf[4096]; - long int memsize = -1; - - f = fopen("/proc/meminfo", "r"); - if (f == NULL) - return -1; - - while (fgets(buf, sizeof(buf), f) != NULL) { - long int value; - - if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) { - memsize = value / 1024; - break; - } - } - - fclose(f); - return memsize; -} - /* lookup event for identical, parent, child device */ -static int devpath_busy(struct event *event) +static bool is_devpath_busy(struct event *event) { struct udev_list_node *loop; size_t common; @@ -455,18 +465,21 @@ static int devpath_busy(struct event *event) /* event we checked earlier still exists, no need to check again */ if (loop_event->seqnum == event->delaying_seqnum) - return 2; + return true; /* found ourself, no later event can block us */ if (loop_event->seqnum >= event->seqnum) break; + /* check major/minor */ + if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block) + return true; + /* check our old name */ - if (event->devpath_old != NULL) - if (strcmp(loop_event->devpath, event->devpath_old) == 0) { - event->delaying_seqnum = loop_event->seqnum; - return 3; - } + if (event->devpath_old != NULL && strcmp(loop_event->devpath, event->devpath_old) == 0) { + event->delaying_seqnum = loop_event->seqnum; + return true; + } /* compare devpath */ common = MIN(loop_event->devpath_len, event->devpath_len); @@ -478,26 +491,26 @@ static int devpath_busy(struct event *event) /* identical device event found */ if (loop_event->devpath_len == event->devpath_len) { event->delaying_seqnum = loop_event->seqnum; - return 4; + return true; } /* parent device event found */ if (event->devpath[common] == '/') { event->delaying_seqnum = loop_event->seqnum; - return 5; + return true; } /* child device event found */ if (loop_event->devpath[common] == '/') { event->delaying_seqnum = loop_event->seqnum; - return 6; + return true; } /* no matching device */ continue; } - return 0; + return false; } static void events_start(struct udev *udev) @@ -511,18 +524,18 @@ static void events_start(struct udev *udev) continue; /* do not start event if parent or child event is still running */ - if (devpath_busy(event) != 0) { + if (is_devpath_busy(event)) { dbg(udev, "delay seq %llu (%s)\n", event->seqnum, event->devpath); continue; } - event_run(event); + event_run(event, false); } } static void worker_returned(void) { - while (1) { + for (;;) { struct worker_message msg; ssize_t size; struct udev_list_node *loop; @@ -544,6 +557,7 @@ static void worker_returned(void) worker->event = NULL; if (worker->state != WORKER_KILLED) worker->state = WORKER_IDLE; + worker_unref(worker); break; } } @@ -570,17 +584,17 @@ static void handle_ctrl_msg(struct udev_ctrl *uctrl) if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) { info(udev, "udevd message (STOP_EXEC_QUEUE) received\n"); - stop_exec_queue = 1; + stop_exec_queue = true; } if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) { info(udev, "udevd message (START_EXEC_QUEUE) received\n"); - stop_exec_queue = 0; + stop_exec_queue = false; } if (udev_ctrl_get_reload_rules(ctrl_msg) > 0) { info(udev, "udevd message (RELOAD_RULES) received\n"); - reload_config = 1; + reload_config = true; } str = udev_ctrl_get_set_env(ctrl_msg); @@ -610,10 +624,10 @@ static void handle_ctrl_msg(struct udev_ctrl *uctrl) worker_kill(udev, 0); } - i = udev_ctrl_get_set_max_childs(ctrl_msg); + i = udev_ctrl_get_set_children_max(ctrl_msg); if (i >= 0) { - info(udev, "udevd message (SET_MAX_CHILDS) received, max_childs=%i\n", i); - max_childs = i; + info(udev, "udevd message (SET_MAX_CHILDREN) received, children_max=%i\n", i); + children_max = i; } settle_pid = udev_ctrl_get_settle(ctrl_msg); @@ -628,7 +642,7 @@ static void handle_ctrl_msg(struct udev_ctrl *uctrl) /* read inotify messages */ static int handle_inotify(struct udev *udev) { - ssize_t nbytes, pos; + int nbytes, pos; char *buf; struct inotify_event *ev; @@ -648,14 +662,21 @@ static int handle_inotify(struct udev *udev) ev = (struct inotify_event *)(buf + pos); if (ev->len) { - dbg(udev, "inotify event: %x for %s\n", ev->mask, ev->name); - reload_config = 1; + const char *s; + + info(udev, "inotify event: %x for %s\n", ev->mask, ev->name); + s = strstr(ev->name, ".rules"); + if (s == NULL) + continue; + if (strlen(s) != strlen(".rules")) + continue; + reload_config = true; continue; } dev = udev_watch_lookup(udev, ev->wd); if (dev != NULL) { - dbg(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev)); + info(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev)); if (ev->mask & IN_CLOSE_WRITE) { char filename[UTIL_PATH_SIZE]; int fd; @@ -684,10 +705,10 @@ static void handle_signal(struct udev *udev, int signo) switch (signo) { case SIGINT: case SIGTERM: - udev_exit = 1; + udev_exit = true; break; case SIGCHLD: - while (1) { + for (;;) { pid_t pid; int status; struct udev_list_node *loop, *tmp; @@ -702,69 +723,243 @@ static void handle_signal(struct udev *udev, int signo) if (worker->pid != pid) continue; - /* fail event, if worker died unexpectedly */ - if (worker->event != NULL) { - worker->event->exitcode = status; + info(udev, "worker [%u] exit\n", pid); + if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { err(udev, "worker [%u] unexpectedly returned with status 0x%04x\n", pid, status); - event_queue_delete(worker->event); + if (worker->event != NULL) { + err(udev, "worker [%u] failed while handling '%s'\n", pid, worker->event->devpath); + worker->event->exitcode = -32; + event_queue_delete(worker->event); + /* drop reference from running event */ + worker_unref(worker); + } } - - udev_list_node_remove(&worker->node); worker_unref(worker); - childs--; - info(udev, "worker [%u] exit\n", pid); break; } } break; case SIGHUP: - reload_config = 1; + reload_config = true; break; } } -static void startup_log(struct udev *udev) +static void static_dev_create_from_modules(struct udev *udev) { + struct utsname kernel; + char modules[UTIL_PATH_SIZE]; + char buf[4096]; FILE *f; - char path[UTIL_PATH_SIZE]; - struct stat statbuf; - f = fopen("/dev/kmsg", "w"); - if (f != NULL) - fprintf(f, "<6>udev: starting version " VERSION "\n"); + uname(&kernel); + util_strscpyl(modules, sizeof(modules), "/lib/modules/", kernel.release, "/modules.devname", NULL); + f = fopen(modules, "r"); + if (f == NULL) + return; + + while (fgets(buf, sizeof(buf), f) != NULL) { + char *s; + const char *modname; + const char *devname; + const char *devno; + int maj, min; + char type; + mode_t mode; + char filename[UTIL_PATH_SIZE]; - util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), "/class/mem/null", NULL); - if (lstat(path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) { - const char *depr_str = - "udev: missing sysfs features; please update the kernel " - "or disable the kernel's CONFIG_SYSFS_DEPRECATED option; " - "udev may fail to work correctly"; - - if (f != NULL) - fprintf(f, "<3>%s\n", depr_str); - err(udev, "%s\n", depr_str); - sleep(3); + if (buf[0] == '#') + continue; + + modname = buf; + s = strchr(modname, ' '); + if (s == NULL) + continue; + s[0] = '\0'; + + devname = &s[1]; + s = strchr(devname, ' '); + if (s == NULL) + continue; + s[0] = '\0'; + + devno = &s[1]; + s = strchr(devno, ' '); + if (s == NULL) + s = strchr(devno, '\n'); + if (s != NULL) + s[0] = '\0'; + if (sscanf(devno, "%c%u:%u", &type, &maj, &min) != 3) + continue; + + if (type == 'c') + mode = 0600 | S_IFCHR; + else if (type == 'b') + mode = 0600 | S_IFBLK; + else + continue; + + util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/", devname, NULL); + util_create_path(udev, filename); + udev_selinux_setfscreatecon(udev, filename, mode); + info(udev, "mknod '%s' %c%u:%u\n", filename, type, maj, min); + if (mknod(filename, mode, makedev(maj, min)) < 0 && errno == EEXIST) + utimensat(AT_FDCWD, filename, NULL, 0); + udev_selinux_resetfscreatecon(udev); } - if (f != NULL) - fclose(f); + fclose(f); +} + +static int copy_dir(struct udev *udev, DIR *dir_from, DIR *dir_to, int maxdepth) +{ + struct dirent *dent; + + for (dent = readdir(dir_from); dent != NULL; dent = readdir(dir_from)) { + struct stat stats; + + if (dent->d_name[0] == '.') + continue; + if (fstatat(dirfd(dir_from), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0) + continue; + + if (S_ISBLK(stats.st_mode) || S_ISCHR(stats.st_mode)) { + udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, stats.st_mode & 0777); + if (mknodat(dirfd(dir_to), dent->d_name, stats.st_mode, stats.st_rdev) == 0) { + fchmodat(dirfd(dir_to), dent->d_name, stats.st_mode & 0777, 0); + fchownat(dirfd(dir_to), dent->d_name, stats.st_uid, stats.st_gid, 0); + } else { + utimensat(dirfd(dir_to), dent->d_name, NULL, 0); + } + udev_selinux_resetfscreatecon(udev); + } else if (S_ISLNK(stats.st_mode)) { + char target[UTIL_PATH_SIZE]; + ssize_t len; + + len = readlinkat(dirfd(dir_from), dent->d_name, target, sizeof(target)); + if (len <= 0 || len == (ssize_t)sizeof(target)) + continue; + target[len] = '\0'; + udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, S_IFLNK); + if (symlinkat(target, dirfd(dir_to), dent->d_name) < 0 && errno == EEXIST) + utimensat(dirfd(dir_to), dent->d_name, NULL, AT_SYMLINK_NOFOLLOW); + udev_selinux_resetfscreatecon(udev); + } else if (S_ISDIR(stats.st_mode)) { + DIR *dir2_from, *dir2_to; + + if (maxdepth == 0) + continue; + + udev_selinux_setfscreateconat(udev, dirfd(dir_to), dent->d_name, S_IFDIR|0755); + mkdirat(dirfd(dir_to), dent->d_name, 0755); + udev_selinux_resetfscreatecon(udev); + + dir2_to = fdopendir(openat(dirfd(dir_to), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); + if (dir2_to == NULL) + continue; + + dir2_from = fdopendir(openat(dirfd(dir_from), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); + if (dir2_from == NULL) { + closedir(dir2_to); + continue; + } + + copy_dir(udev, dir2_from, dir2_to, maxdepth-1); + + closedir(dir2_to); + closedir(dir2_from); + } + } + + return 0; +} + +static void static_dev_create_links(struct udev *udev, DIR *dir) +{ + struct stdlinks { + const char *link; + const char *target; + }; + static const struct stdlinks stdlinks[] = { + { "core", "/proc/kcore" }, + { "fd", "/proc/self/fd" }, + { "stdin", "/proc/self/fd/0" }, + { "stdout", "/proc/self/fd/1" }, + { "stderr", "/proc/self/fd/2" }, + }; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(stdlinks); i++) { + udev_selinux_setfscreateconat(udev, dirfd(dir), stdlinks[i].link, S_IFLNK); + if (symlinkat(stdlinks[i].target, dirfd(dir), stdlinks[i].link) < 0 && errno == EEXIST) + utimensat(dirfd(dir), stdlinks[i].link, NULL, AT_SYMLINK_NOFOLLOW); + udev_selinux_resetfscreatecon(udev); + } +} + +static void static_dev_create_from_devices(struct udev *udev, DIR *dir) +{ + DIR *dir_from; + + dir_from = opendir(LIBEXECDIR "/devices"); + if (dir_from == NULL) + return; + copy_dir(udev, dir_from, dir, 8); + closedir(dir_from); +} + +static void static_dev_create(struct udev *udev) +{ + DIR *dir; + + dir = opendir(udev_get_dev_path(udev)); + if (dir == NULL) + return; + + static_dev_create_links(udev, dir); + static_dev_create_from_devices(udev, dir); + + closedir(dir); +} + +static int mem_size_mb(void) +{ + FILE *f; + char buf[4096]; + long int memsize = -1; + + f = fopen("/proc/meminfo", "r"); + if (f == NULL) + return -1; + + while (fgets(buf, sizeof(buf), f) != NULL) { + long int value; + + if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) { + memsize = value / 1024; + break; + } + } + + fclose(f); + return memsize; } int main(int argc, char *argv[]) { struct udev *udev; int fd; + FILE *f; sigset_t mask; - const char *value; - int daemonize = 0; + int daemonize = false; int resolve_names = 1; static const struct option options[] = { { "daemon", no_argument, NULL, 'd' }, - { "debug-trace", no_argument, NULL, 't' }, { "debug", no_argument, NULL, 'D' }, + { "children-max", required_argument, NULL, 'c' }, + { "resolve-names", required_argument, NULL, 'N' }, { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, - { "resolve-names", required_argument, NULL, 'N' }, {} }; int rc = 1; @@ -778,7 +973,7 @@ int main(int argc, char *argv[]) info(udev, "version %s\n", VERSION); udev_selinux_init(udev); - while (1) { + for (;;) { int option; option = getopt_long(argc, argv, "dDthV", options, NULL); @@ -787,13 +982,13 @@ int main(int argc, char *argv[]) switch (option) { case 'd': - daemonize = 1; + daemonize = true; break; - case 't': - debug_trace = 1; + case 'c': + children_max = strtoul(optarg, NULL, 10); break; case 'D': - debug = 1; + debug = true; if (udev_get_log_priority(udev) < LOG_INFO) udev_set_log_priority(udev, LOG_INFO); break; @@ -811,7 +1006,7 @@ int main(int argc, char *argv[]) } break; case 'h': - printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--debug] " + printf("Usage: udevd [--help] [--daemon] [--children-max] [--debug] " "[--resolve-names=early|late|never] [--version]\n"); goto exit; case 'V': @@ -875,25 +1070,32 @@ int main(int argc, char *argv[]) if (udev_get_rules_path(udev) != NULL) { inotify_add_watch(pfd[FD_INOTIFY].fd, udev_get_rules_path(udev), - IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); + IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); } else { char filename[UTIL_PATH_SIZE]; + struct stat statbuf; inotify_add_watch(pfd[FD_INOTIFY].fd, LIBEXECDIR "/rules.d", - IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); + IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); inotify_add_watch(pfd[FD_INOTIFY].fd, SYSCONFDIR "/udev/rules.d", - IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); + IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); /* watch dynamic rules directory */ util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL); + if (stat(filename, &statbuf) != 0) { + util_create_path(udev, filename); + udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755); + mkdir(filename, 0755); + udev_selinux_resetfscreatecon(udev); + } inotify_add_watch(pfd[FD_INOTIFY].fd, filename, - IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); + IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); } udev_watch_restore(udev); /* block and listen to all signals on signalfd */ sigfillset(&mask); - sigprocmask(SIG_SETMASK, &mask, NULL); + sigprocmask(SIG_SETMASK, &mask, &orig_sigmask); pfd[FD_SIGNAL].fd = signalfd(-1, &mask, 0); if (pfd[FD_SIGNAL].fd < 0) { fprintf(stderr, "error getting signalfd\n"); @@ -903,14 +1105,13 @@ int main(int argc, char *argv[]) } /* unnamed socket from workers to the main daemon */ - if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, worker_watch) < 0) { + if (socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, worker_watch) < 0) { fprintf(stderr, "error getting socketpair\n"); err(udev, "error getting socketpair\n"); rc = 6; goto exit; } pfd[FD_WORKER].fd = worker_watch[READ_END]; - util_set_fd_cloexec(worker_watch[WRITE_END]); rules = udev_rules_new(udev, resolve_names); if (rules == NULL) { @@ -941,10 +1142,14 @@ int main(int argc, char *argv[]) } } - startup_log(udev); + f = fopen("/dev/kmsg", "w"); + if (f != NULL) { + fprintf(f, "<6>udev: starting version " VERSION "\n"); + fclose(f); + } /* redirect std{out,err} */ - if (!debug && !debug_trace) { + if (!debug) { dup2(fd, STDIN_FILENO); dup2(fd, STDOUT_FILENO); dup2(fd, STDERR_FILENO); @@ -968,23 +1173,26 @@ int main(int argc, char *argv[]) close(fd); } - /* in trace mode run one event after the other */ - if (debug_trace) { - max_childs = 1; - } else { - int memsize = mem_size_mb(); + if (children_max <= 0) { + const char *value = getenv("UDEVD_CHILDREN_MAX"); - if (memsize > 0) - max_childs = 128 + (memsize / 8); - else - max_childs = 128; + if (value) { + children_max = strtoul(value, NULL, 10); + } else { + int memsize = mem_size_mb(); + + /* set value depending on the amount of RAM */ + if (memsize > 0) + children_max = 128 + (memsize / 8); + else + children_max = 128; + } } + info(udev, "set children_max to %u\n", children_max); - /* possibly overwrite maximum limit of executed events */ - value = getenv("UDEVD_MAX_CHILDS"); - if (value) - max_childs = strtoul(value, NULL, 10); - info(udev, "initialize max_childs to %u\n", max_childs); + static_dev_create(udev); + static_dev_create_from_modules(udev); + udev_rules_apply_static_dev_perms(rules); udev_list_init(&event_list); udev_list_init(&worker_list); @@ -994,7 +1202,7 @@ int main(int argc, char *argv[]) int timeout; /* set timeout to kill idle workers */ - if (udev_list_is_empty(&event_list) && childs > 2) + if (udev_list_is_empty(&event_list) && children > 2) timeout = 3 * 1000; else timeout = -1;