X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udevd.c;h=8f3329ea635ab0f5d542f252a1d4b58e95708ad6;hp=bec4e3d7b43c0e346ced75a1ad0bb5cc59c28539;hb=a401355d5aed89f686d178f01400432c71cf6380;hpb=eef7c9a385575375a3e3310900022b37777aeb6c diff --git a/udevd.c b/udevd.c index bec4e3d7b..8f3329ea6 100644 --- a/udevd.c +++ b/udevd.c @@ -1,10 +1,7 @@ /* - * udevd.c - event listener and serializer - * * Copyright (C) 2004-2006 Kay Sievers * Copyright (C) 2004 Chris Friesen * - * * 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 version 2 of the License. @@ -16,7 +13,7 @@ * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ @@ -32,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -47,6 +45,9 @@ #include "udevd.h" #include "udev_selinux.h" +static int debug_trace; +static int verbose; + static struct udev_rules rules; static int udevd_sock = -1; static int uevent_netlink_sock = -1; @@ -78,7 +79,15 @@ void log_message(int priority, const char *format, ...) va_start(args, format); vsyslog(priority, format, args); va_end(args); + + if (verbose) { + va_start(args, format); + vprintf(format, args); + va_end(args); + printf("\n"); + } } + #endif static void asmlinkage udev_event_sig_handler(int signum) @@ -115,7 +124,7 @@ static int udev_event_process(struct udevd_uevent_msg *msg) for (i = 0; msg->envp[i]; i++) putenv(msg->envp[i]); - udev = udev_device_init(); + udev = udev_device_init(NULL); if (udev == NULL) return -1; strlcpy(udev->action, msg->action, sizeof(udev->action)); @@ -158,45 +167,32 @@ static void export_event_state(struct udevd_uevent_msg *msg, enum event_state st { char filename[PATH_SIZE]; char filename_failed[PATH_SIZE]; - char target[PATH_SIZE]; - size_t start, end, i; + size_t start; struct udevd_uevent_msg *loop_msg; + int fd; /* add location of queue files */ strlcpy(filename, udev_root, sizeof(filename)); strlcat(filename, "/", sizeof(filename)); - start = strlcat(filename, EVENT_QUEUE_DIR, sizeof(filename)); - end = strlcat(filename, msg->devpath, sizeof(filename)); - if (end > sizeof(filename)) - end = sizeof(filename); - - /* replace '/' to transform path into a filename */ - for (i = start+1; i < end; i++) - if (filename[i] == '/') - filename[i] = PATH_TO_NAME_CHAR; + start = strlcat(filename, EVENT_QUEUE_DIR"/", sizeof(filename)); + strlcat(filename, msg->devpath, sizeof(filename)); + path_encode(&filename[start], sizeof(filename) - start); /* add location of failed files */ strlcpy(filename_failed, udev_root, sizeof(filename_failed)); strlcat(filename_failed, "/", sizeof(filename_failed)); - start = strlcat(filename_failed, EVENT_FAILED_DIR, sizeof(filename_failed)); - end = strlcat(filename_failed, msg->devpath, sizeof(filename_failed)); - if (end > sizeof(filename_failed)) - end = sizeof(filename_failed); - - /* replace '/' to transform path into a filename */ - for (i = start+1; i < end; i++) - if (filename_failed[i] == '/') - filename_failed[i] = PATH_TO_NAME_CHAR; + start = strlcat(filename_failed, EVENT_FAILED_DIR"/", sizeof(filename_failed)); + strlcat(filename_failed, msg->devpath, sizeof(filename_failed)); + path_encode(&filename_failed[start], sizeof(filename) - start); switch (state) { case EVENT_QUEUED: unlink(filename_failed); delete_path(filename_failed); - - strlcpy(target, sysfs_path, sizeof(target)); - strlcat(target, msg->devpath, sizeof(target)); create_path(filename); - symlink(target, filename); + fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644); + if (fd > 0) + close(fd); return; case EVENT_FINISHED: case EVENT_FAILED: @@ -300,6 +296,15 @@ static void msg_queue_insert(struct udevd_uevent_msg *msg) export_event_state(msg, EVENT_QUEUED); + /* run one event after the other in debug mode */ + if (debug_trace) { + list_add_tail(&msg->node, &running_list); + udev_event_run(msg); + waitpid(msg->pid, NULL, 0); + msg_queue_delete(msg); + return; + } + /* run all events with a timeout set immediately */ if (msg->timeout != 0) { list_add_tail(&msg->node, &running_list); @@ -343,7 +348,7 @@ static int mem_size_mb(void) static int cpu_count(void) { int f; - char buf[32768]; + char buf[65536]; int len; const char *pos; int count = 0; @@ -566,8 +571,9 @@ static struct udevd_uevent_msg *get_msg_from_envbuf(const char *buf, int buf_siz int bufpos; int i; struct udevd_uevent_msg *msg; - int major = 0; - int minor = 0; + char *physdevdriver_key = NULL; + int maj = 0; + int min = 0; msg = malloc(sizeof(struct udevd_uevent_msg) + buf_size); if (msg == NULL) @@ -600,15 +606,24 @@ static struct udevd_uevent_msg *get_msg_from_envbuf(const char *buf, int buf_siz msg->seqnum = strtoull(&key[7], NULL, 10); else if (strncmp(key, "PHYSDEVPATH=", 12) == 0) msg->physdevpath = &key[12]; + else if (strncmp(key, "PHYSDEVDRIVER=", 14) == 0) + physdevdriver_key = key; else if (strncmp(key, "MAJOR=", 6) == 0) - major = strtoull(&key[6], NULL, 10); + maj = strtoull(&key[6], NULL, 10); else if (strncmp(key, "MINOR=", 6) == 0) - minor = strtoull(&key[6], NULL, 10); + min = strtoull(&key[6], NULL, 10); else if (strncmp(key, "TIMEOUT=", 8) == 0) msg->timeout = strtoull(&key[8], NULL, 10); } - msg->devt = makedev(major, minor); + msg->devt = makedev(maj, min); msg->envp[i++] = "UDEVD_EVENT=1"; + + if (msg->driver == NULL && msg->physdevpath == NULL && physdevdriver_key != NULL) { + /* for older kernels DRIVER is empty for a bus device, export PHYSDEVDRIVER as DRIVER */ + msg->envp[i++] = &physdevdriver_key[7]; + msg->driver = &physdevdriver_key[14]; + } + msg->envp[i] = NULL; if (msg->devpath == NULL || msg->action == NULL) { @@ -910,64 +925,122 @@ int main(int argc, char *argv[], char *envp[]) fd_set readfds; const char *value; int daemonize = 0; - int i; - int rc = 0; + int option; + static const struct option options[] = { + { "daemon", 0, NULL, 'd' }, + { "debug-trace", 0, NULL, 't' }, + { "verbose", 0, NULL, 'v' }, + { "help", 0, NULL, 'h' }, + { "version", 0, NULL, 'V' }, + {} + }; + int rc = 1; int maxfd; - /* redirect std fd's, if the kernel forks us, we don't have them at all */ - fd = open("/dev/null", O_RDWR); - if (fd >= 0) { - if (fd != STDIN_FILENO) - dup2(fd, STDIN_FILENO); - if (fd != STDOUT_FILENO) - dup2(fd, STDOUT_FILENO); - if (fd != STDERR_FILENO) - dup2(fd, STDERR_FILENO); - if (fd > STDERR_FILENO) - close(fd); - } - logging_init("udevd"); - if (fd < 0) - err("fatal, could not open /dev/null: %s", strerror(errno)); - udev_config_init(); selinux_init(); dbg("version %s", UDEV_VERSION); + /* parse commandline options */ + while (1) { + option = getopt_long(argc, argv, "dtvhV", options, NULL); + if (option == -1) + break; + + switch (option) { + case 'd': + daemonize = 1; + break; + case 't': + debug_trace = 1; + break; + case 'v': + verbose = 1; + if (udev_log_priority < LOG_INFO) + udev_log_priority = LOG_INFO; + break; + case 'h': + printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--verbose] [--version]\n"); + goto exit; + case 'V': + printf("%s\n", UDEV_VERSION); + goto exit; + default: + goto exit; + } + } + if (getuid() != 0) { - err("need to be root, exit"); + fprintf(stderr, "root privileges required\n"); + err("root privileges required"); goto exit; } - /* parse commandline options */ - for (i = 1 ; i < argc; i++) { - char *arg = argv[i]; - if (strcmp(arg, "--daemon") == 0 || strcmp(arg, "-d") == 0) { - info("will daemonize"); - daemonize = 1; - } + /* make sure std{in,out,err} fd's are in a sane state */ + fd = open("/dev/null", O_RDWR); + if (fd < 0) { + fprintf(stderr, "cannot open /dev/null\n"); + err("cannot open /dev/null"); } + if (fd > STDIN_FILENO) + dup2(fd, STDIN_FILENO); + if (write(STDOUT_FILENO, 0, 0) < 0) + dup2(fd, STDOUT_FILENO); + if (write(STDERR_FILENO, 0, 0) < 0) + dup2(fd, STDERR_FILENO); /* init sockets to receive events */ if (init_udevd_socket() < 0) { if (errno == EADDRINUSE) { - err("another udevd running, exit"); + fprintf(stderr, "another udev daemon already running\n"); + err("another udev daemon already running"); rc = 1; } else { - err("error initializing udevd socket: %s", strerror(errno)); + fprintf(stderr, "error initializing udevd socket\n"); + err("error initializing udevd socket"); rc = 2; } goto exit; } if (init_uevent_netlink_sock() < 0) { - err("uevent socket not available"); + fprintf(stderr, "error initializing netlink socket\n"); + err("error initializing netlink socket"); rc = 3; goto exit; } - /* parse the rules and keep it in memory */ + /* setup signal handler pipe */ + retval = pipe(signal_pipe); + if (retval < 0) { + err("error getting pipes: %s", strerror(errno)); + goto exit; + } + + retval = fcntl(signal_pipe[READ_END], F_GETFL, 0); + if (retval < 0) { + err("error fcntl on read pipe: %s", strerror(errno)); + goto exit; + } + retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK); + if (retval < 0) { + err("error fcntl on read pipe: %s", strerror(errno)); + goto exit; + } + + retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0); + if (retval < 0) { + err("error fcntl on write pipe: %s", strerror(errno)); + goto exit; + } + retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK); + if (retval < 0) { + err("error fcntl on write pipe: %s", strerror(errno)); + goto exit; + } + + /* parse the rules and keep them in memory */ sysfs_init(); udev_rules_init(&rules, 1); @@ -987,10 +1060,18 @@ int main(int argc, char *argv[], char *envp[]) goto exit; default: dbg("child [%u] running, parent exits", pid); + rc = 0; goto exit; } } + /* redirect std{out,err} fd's */ + if (!verbose) + dup2(fd, STDOUT_FILENO); + dup2(fd, STDERR_FILENO); + if (fd > STDERR_FILENO) + close(fd); + /* set scheduling priority for the daemon */ setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY); @@ -1010,35 +1091,6 @@ int main(int argc, char *argv[], char *envp[]) close(fd); } - /* setup signal handler pipe */ - retval = pipe(signal_pipe); - if (retval < 0) { - err("error getting pipes: %s", strerror(errno)); - goto exit; - } - - retval = fcntl(signal_pipe[READ_END], F_GETFL, 0); - if (retval < 0) { - err("error fcntl on read pipe: %s", strerror(errno)); - goto exit; - } - retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK); - if (retval < 0) { - err("error fcntl on read pipe: %s", strerror(errno)); - goto exit; - } - - retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0); - if (retval < 0) { - err("error fcntl on write pipe: %s", strerror(errno)); - goto exit; - } - retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK); - if (retval < 0) { - err("error fcntl on write pipe: %s", strerror(errno)); - goto exit; - } - /* set signal handlers */ memset(&act, 0x00, sizeof(struct sigaction)); act.sa_handler = (void (*)(int)) sig_handler; @@ -1052,7 +1104,7 @@ int main(int argc, char *argv[], char *envp[]) /* watch rules directory */ inotify_fd = inotify_init(); if (inotify_fd >= 0) - inotify_add_watch(inotify_fd, udev_rules_filename, IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); + inotify_add_watch(inotify_fd, udev_rules_dir, IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE); else if (errno == ENOSYS) err("the kernel does not support inotify, udevd can't monitor configuration file changes"); else @@ -1090,6 +1142,8 @@ int main(int argc, char *argv[], char *envp[]) /* export log_priority , as called programs may want to follow that setting */ sprintf(udev_log, "UDEV_LOG=%i", udev_log_priority); putenv(udev_log); + if (debug_trace) + putenv("DEBUG=1"); maxfd = udevd_sock; maxfd = UDEV_MAX(maxfd, uevent_netlink_sock); @@ -1152,7 +1206,7 @@ int main(int argc, char *argv[], char *envp[]) } } - /* rules changed, set by inotify or a signal*/ + /* rules changed, set by inotify or a HUP signal */ if (reload_config) { reload_config = 0; udev_rules_cleanup(&rules); @@ -1171,10 +1225,12 @@ int main(int argc, char *argv[], char *envp[]) msg_queue_manager(); } } + rc = 0; exit: udev_rules_cleanup(&rules); sysfs_cleanup(); + selinux_exit(); if (signal_pipe[READ_END] >= 0) close(signal_pipe[READ_END]);