X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fudevadm-settle.c;h=b168defd902df7ee2f900afa830ef8091c4694c0;hp=a59d7c39e5b283e71288ff68ed8c6b3f38d0630e;hb=19b66dc57cce27175ff421c4c3a37e4a491b9c01;hpb=ad29a9f14fa8b1932c0e418bfcf1c10ce6a35a33 diff --git a/src/udevadm-settle.c b/src/udevadm-settle.c index a59d7c39e..b168defd9 100644 --- a/src/udevadm-settle.c +++ b/src/udevadm-settle.c @@ -38,198 +38,198 @@ static int adm_settle(struct udev *udev, int argc, char *argv[]) { - static const struct option options[] = { - { "seq-start", required_argument, NULL, 's' }, - { "seq-end", required_argument, NULL, 'e' }, - { "timeout", required_argument, NULL, 't' }, - { "exit-if-exists", required_argument, NULL, 'E' }, - { "quiet", no_argument, NULL, 'q' }, - { "help", no_argument, NULL, 'h' }, - {} - }; - unsigned long long start_usec = now_usec(); - unsigned long long start = 0; - unsigned long long end = 0; - int quiet = 0; - const char *exists = NULL; - unsigned int timeout = 120; - struct pollfd pfd[1]; - struct udev_queue *udev_queue = NULL; - int rc = EXIT_FAILURE; - - dbg(udev, "version %s\n", VERSION); - - for (;;) { - int option; - int seconds; - - option = getopt_long(argc, argv, "s:e:t:E:qh", options, NULL); - if (option == -1) - break; - - switch (option) { - case 's': - start = strtoull(optarg, NULL, 0); - break; - case 'e': - end = strtoull(optarg, NULL, 0); - break; - case 't': - seconds = atoi(optarg); - if (seconds >= 0) - timeout = seconds; - else - fprintf(stderr, "invalid timeout value\n"); - dbg(udev, "timeout=%i\n", timeout); - break; - case 'q': - quiet = 1; - break; - case 'E': - exists = optarg; - break; - case 'h': - printf("Usage: udevadm settle OPTIONS\n" - " --timeout= maximum time to wait for events\n" - " --seq-start= first seqnum to wait for\n" - " --seq-end= last seqnum to wait for\n" - " --exit-if-exists= stop waiting if file exists\n" - " --quiet do not print list after timeout\n" - " --help\n\n"); - exit(EXIT_SUCCESS); - default: - exit(EXIT_FAILURE); - } - } - - udev_queue = udev_queue_new(udev); - if (udev_queue == NULL) - exit(2); - - if (start > 0) { - unsigned long long kernel_seq; - - kernel_seq = udev_queue_get_kernel_seqnum(udev_queue); - - /* unless specified, the last event is the current kernel seqnum */ - if (end == 0) - end = udev_queue_get_kernel_seqnum(udev_queue); - - if (start > end) { - err(udev, "seq-start larger than seq-end, ignoring\n"); - start = 0; - end = 0; - } - - if (start > kernel_seq || end > kernel_seq) { - err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n"); - start = 0; - end = 0; - } - info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq); - } else { - if (end > 0) { - err(udev, "seq-end needs seq-start parameter, ignoring\n"); - end = 0; - } - } - - /* guarantee that the udev daemon isn't pre-processing */ - if (getuid() == 0) { - struct udev_ctrl *uctrl; - - uctrl = udev_ctrl_new(udev); - if (uctrl != NULL) { - if (udev_ctrl_send_ping(uctrl, timeout) < 0) { - info(udev, "no connection to daemon\n"); - udev_ctrl_unref(uctrl); - rc = EXIT_SUCCESS; - goto out; - } - udev_ctrl_unref(uctrl); - } - } - - pfd[0].events = POLLIN; - pfd[0].fd = inotify_init1(IN_CLOEXEC); - if (pfd[0].fd < 0) { - err(udev, "inotify_init failed: %m\n"); - } else { - if (inotify_add_watch(pfd[0].fd, udev_get_run_path(udev), IN_MOVED_TO) < 0) { - err(udev, "watching '%s' failed\n", udev_get_run_path(udev)); - close(pfd[0].fd); - pfd[0].fd = -1; - } - } - - for (;;) { - struct stat statbuf; - - if (exists != NULL && stat(exists, &statbuf) == 0) { - rc = EXIT_SUCCESS; - break; - } - - if (start > 0) { - /* if asked for, wait for a specific sequence of events */ - if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) { - rc = EXIT_SUCCESS; - break; - } - } else { - /* exit if queue is empty */ - if (udev_queue_get_queue_is_empty(udev_queue)) { - rc = EXIT_SUCCESS; - break; - } - } - - if (pfd[0].fd >= 0) { - int delay; - - if (exists != NULL || start > 0) - delay = 100; - else - delay = 1000; - /* wake up after delay, or immediately after the queue is rebuilt */ - if (poll(pfd, 1, delay) > 0 && pfd[0].revents & POLLIN) { - char buf[sizeof(struct inotify_event) + PATH_MAX]; - - read(pfd[0].fd, buf, sizeof(buf)); - } - } else { - sleep(1); - } - - if (timeout > 0) { - unsigned long long age_usec; - - age_usec = now_usec() - start_usec; - if (age_usec / (1000 * 1000) >= timeout) { - struct udev_list_entry *list_entry; - - if (!quiet && udev_queue_get_queued_list_entry(udev_queue) != NULL) { - info(udev, "timeout waiting for udev queue\n"); - printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout); - udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue)) - printf(" %s (%s)\n", - udev_list_entry_get_name(list_entry), - udev_list_entry_get_value(list_entry)); - } - - break; - } - } - } + static const struct option options[] = { + { "seq-start", required_argument, NULL, 's' }, + { "seq-end", required_argument, NULL, 'e' }, + { "timeout", required_argument, NULL, 't' }, + { "exit-if-exists", required_argument, NULL, 'E' }, + { "quiet", no_argument, NULL, 'q' }, + { "help", no_argument, NULL, 'h' }, + {} + }; + unsigned long long start_usec = now_usec(); + unsigned long long start = 0; + unsigned long long end = 0; + int quiet = 0; + const char *exists = NULL; + unsigned int timeout = 120; + struct pollfd pfd[1]; + struct udev_queue *udev_queue = NULL; + int rc = EXIT_FAILURE; + + dbg(udev, "version %s\n", VERSION); + + for (;;) { + int option; + int seconds; + + option = getopt_long(argc, argv, "s:e:t:E:qh", options, NULL); + if (option == -1) + break; + + switch (option) { + case 's': + start = strtoull(optarg, NULL, 0); + break; + case 'e': + end = strtoull(optarg, NULL, 0); + break; + case 't': + seconds = atoi(optarg); + if (seconds >= 0) + timeout = seconds; + else + fprintf(stderr, "invalid timeout value\n"); + dbg(udev, "timeout=%i\n", timeout); + break; + case 'q': + quiet = 1; + break; + case 'E': + exists = optarg; + break; + case 'h': + printf("Usage: udevadm settle OPTIONS\n" + " --timeout= maximum time to wait for events\n" + " --seq-start= first seqnum to wait for\n" + " --seq-end= last seqnum to wait for\n" + " --exit-if-exists= stop waiting if file exists\n" + " --quiet do not print list after timeout\n" + " --help\n\n"); + exit(EXIT_SUCCESS); + default: + exit(EXIT_FAILURE); + } + } + + udev_queue = udev_queue_new(udev); + if (udev_queue == NULL) + exit(2); + + if (start > 0) { + unsigned long long kernel_seq; + + kernel_seq = udev_queue_get_kernel_seqnum(udev_queue); + + /* unless specified, the last event is the current kernel seqnum */ + if (end == 0) + end = udev_queue_get_kernel_seqnum(udev_queue); + + if (start > end) { + err(udev, "seq-start larger than seq-end, ignoring\n"); + start = 0; + end = 0; + } + + if (start > kernel_seq || end > kernel_seq) { + err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n"); + start = 0; + end = 0; + } + info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq); + } else { + if (end > 0) { + err(udev, "seq-end needs seq-start parameter, ignoring\n"); + end = 0; + } + } + + /* guarantee that the udev daemon isn't pre-processing */ + if (getuid() == 0) { + struct udev_ctrl *uctrl; + + uctrl = udev_ctrl_new(udev); + if (uctrl != NULL) { + if (udev_ctrl_send_ping(uctrl, timeout) < 0) { + info(udev, "no connection to daemon\n"); + udev_ctrl_unref(uctrl); + rc = EXIT_SUCCESS; + goto out; + } + udev_ctrl_unref(uctrl); + } + } + + pfd[0].events = POLLIN; + pfd[0].fd = inotify_init1(IN_CLOEXEC); + if (pfd[0].fd < 0) { + err(udev, "inotify_init failed: %m\n"); + } else { + if (inotify_add_watch(pfd[0].fd, udev_get_run_path(udev), IN_MOVED_TO) < 0) { + err(udev, "watching '%s' failed\n", udev_get_run_path(udev)); + close(pfd[0].fd); + pfd[0].fd = -1; + } + } + + for (;;) { + struct stat statbuf; + + if (exists != NULL && stat(exists, &statbuf) == 0) { + rc = EXIT_SUCCESS; + break; + } + + if (start > 0) { + /* if asked for, wait for a specific sequence of events */ + if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) { + rc = EXIT_SUCCESS; + break; + } + } else { + /* exit if queue is empty */ + if (udev_queue_get_queue_is_empty(udev_queue)) { + rc = EXIT_SUCCESS; + break; + } + } + + if (pfd[0].fd >= 0) { + int delay; + + if (exists != NULL || start > 0) + delay = 100; + else + delay = 1000; + /* wake up after delay, or immediately after the queue is rebuilt */ + if (poll(pfd, 1, delay) > 0 && pfd[0].revents & POLLIN) { + char buf[sizeof(struct inotify_event) + PATH_MAX]; + + read(pfd[0].fd, buf, sizeof(buf)); + } + } else { + sleep(1); + } + + if (timeout > 0) { + unsigned long long age_usec; + + age_usec = now_usec() - start_usec; + if (age_usec / (1000 * 1000) >= timeout) { + struct udev_list_entry *list_entry; + + if (!quiet && udev_queue_get_queued_list_entry(udev_queue) != NULL) { + info(udev, "timeout waiting for udev queue\n"); + printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout); + udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue)) + printf(" %s (%s)\n", + udev_list_entry_get_name(list_entry), + udev_list_entry_get_value(list_entry)); + } + + break; + } + } + } out: - if (pfd[0].fd >= 0) - close(pfd[0].fd); - udev_queue_unref(udev_queue); - return rc; + if (pfd[0].fd >= 0) + close(pfd[0].fd); + udev_queue_unref(udev_queue); + return rc; } const struct udevadm_cmd udevadm_settle = { - .name = "settle", - .cmd = adm_settle, - .help = "wait for the event queue to finish", + .name = "settle", + .cmd = adm_settle, + .help = "wait for the event queue to finish", };