./move.sh

1 files changed, 162 insertions, 0 deletions

diff --git a/src/grp-udev/udevadm/udevadm-settle.c b/src/grp-udev/udevadm/udevadm-settle.c
new file mode 100644
index 0000000000..6a5dc6e9e4
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-settle.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2009 Canonical Ltd.
+ * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <poll.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "parse-util.h"
+#include "udev.h"
+#include "util.h"
+
+static void help(void) {
+        printf("%s settle OPTIONS\n\n"
+               "Wait for pending udev events.\n\n"
+               "  -h --help                 Show this help\n"
+               "     --version              Show package version\n"
+               "  -t --timeout=SECONDS      Maximum time to wait for events\n"
+               "  -E --exit-if-exists=FILE  Stop waiting if file exists\n"
+               , program_invocation_short_name);
+}
+
+static int adm_settle(struct udev *udev, int argc, char *argv[]) {
+        static const struct option options[] = {
+                { "timeout",        required_argument, NULL, 't' },
+                { "exit-if-exists", required_argument, NULL, 'E' },
+                { "help",           no_argument,       NULL, 'h' },
+                { "seq-start",      required_argument, NULL, 's' }, /* removed */
+                { "seq-end",        required_argument, NULL, 'e' }, /* removed */
+                { "quiet",          no_argument,       NULL, 'q' }, /* removed */
+                {}
+        };
+        usec_t deadline;
+        const char *exists = NULL;
+        unsigned int timeout = 120;
+        struct pollfd pfd[1] = { {.fd = -1}, };
+        int c;
+        struct udev_queue *queue;
+        int rc = EXIT_FAILURE;
+
+        while ((c = getopt_long(argc, argv, "t:E:hs:e:q", options, NULL)) >= 0) {
+                switch (c) {
+
+                case 't': {
+                        int r;
+
+                        r = safe_atou(optarg, &timeout);
+                        if (r < 0) {
+                                log_error_errno(r, "Invalid timeout value '%s': %m", optarg);
+                                return EXIT_FAILURE;
+                        }
+                        break;
+                }
+
+                case 'E':
+                        exists = optarg;
+                        break;
+
+                case 'h':
+                        help();
+                        return EXIT_SUCCESS;
+
+                case 's':
+                case 'e':
+                case 'q':
+                        log_info("Option -%c no longer supported.", c);
+                        return EXIT_FAILURE;
+
+                case '?':
+                        return EXIT_FAILURE;
+
+                default:
+                        assert_not_reached("Unknown argument");
+                }
+        }
+
+        if (optind < argc) {
+                fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
+                return EXIT_FAILURE;
+        }
+
+        deadline = now(CLOCK_MONOTONIC) + timeout * USEC_PER_SEC;
+
+        /* 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, MAX(5U, timeout)) < 0) {
+                                log_debug("no connection to daemon");
+                                udev_ctrl_unref(uctrl);
+                                return EXIT_SUCCESS;
+                        }
+                        udev_ctrl_unref(uctrl);
+                }
+        }
+
+        queue = udev_queue_new(udev);
+        if (!queue) {
+                log_error("unable to get udev queue");
+                return EXIT_FAILURE;
+        }
+
+        pfd[0].events = POLLIN;
+        pfd[0].fd = udev_queue_get_fd(queue);
+        if (pfd[0].fd < 0) {
+                log_debug("queue is empty, nothing to watch");
+                rc = EXIT_SUCCESS;
+                goto out;
+        }
+
+        for (;;) {
+                if (exists && access(exists, F_OK) >= 0) {
+                        rc = EXIT_SUCCESS;
+                        break;
+                }
+
+                /* exit if queue is empty */
+                if (udev_queue_get_queue_is_empty(queue)) {
+                        rc = EXIT_SUCCESS;
+                        break;
+                }
+
+                if (now(CLOCK_MONOTONIC) >= deadline)
+                        break;
+
+                /* wake up when queue is empty */
+                if (poll(pfd, 1, MSEC_PER_SEC) > 0 && pfd[0].revents & POLLIN)
+                        udev_queue_flush(queue);
+        }
+
+out:
+        udev_queue_unref(queue);
+        return rc;
+}
+
+const struct udevadm_cmd udevadm_settle = {
+        .name = "settle",
+        .cmd = adm_settle,
+        .help = "Wait for pending udev events",
+};