2020-11-09 05:23:58 +01:00
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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2014-02-28 01:02:01 +01:00
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2014-04-24 21:28:46 +02:00
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#include <getopt.h>
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2019-03-27 11:32:41 +01:00
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#include <sys/stat.h>
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#include <sys/types.h>
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networkd-wait-online: improve interoptability and enable by default
To make sure we don't delay boot on systems where (some) network links are managed by someone else
we don't block if something else has successfully brought up a link.
We will still block until all links we are aware of that are managed by networkd have been
configured, but if no such links exist, and someone else have configured a link sufficiently
that it has a carrier, it may be that the link is ready so we should no longer block.
Note that in all likelyhood the link is not ready (no addresses/routes configured),
so whatever network managment daemon configured it should provide a similar wait-online
service to block network-online.target until it is ready.
The aim is to block as long as we know networking is not fully configured, but no longer. This
will allow systemd-networkd-wait-online.service to be enabled on any system, even if we don't
know whether networkd is the main/only network manager.
Even in the case networking is fully configured by networkd, the default behavior may not be
sufficient: if two links need to be configured, but the first is fully configured before the
second one appears we will assume the network is up. To work around that, we allow specifying
specific devices to wait for before considering the network up.
This unit is enabled by default, just like systemd-networkd, but will only be pulled in if
anyone pulls in network-online.target.
2014-04-23 17:42:55 +02:00
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2014-02-28 01:02:01 +01:00
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#include "sd-daemon.h"
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2015-09-23 03:01:06 +02:00
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2018-11-26 08:56:58 +01:00
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#include "daemon-util.h"
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#include "main-func.h"
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2016-11-13 01:29:28 +01:00
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#include "manager.h"
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2018-11-20 15:42:57 +01:00
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#include "pretty-print.h"
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2015-09-23 03:01:06 +02:00
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#include "signal-util.h"
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2019-03-06 15:46:33 +01:00
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#include "socket-util.h"
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2015-09-23 03:01:06 +02:00
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#include "strv.h"
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2014-04-24 21:28:46 +02:00
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static bool arg_quiet = false;
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2015-02-01 21:04:35 +01:00
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static usec_t arg_timeout = 120 * USEC_PER_SEC;
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2019-03-06 15:46:33 +01:00
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static Hashmap *arg_interfaces = NULL;
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2015-01-29 07:34:34 +01:00
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static char **arg_ignore = NULL;
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2020-01-09 21:31:50 +01:00
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static LinkOperationalStateRange arg_required_operstate = { _LINK_OPERSTATE_INVALID, _LINK_OPERSTATE_INVALID };
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2019-03-31 23:43:48 +02:00
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static bool arg_any = false;
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2014-04-24 21:28:46 +02:00
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2020-01-09 21:31:50 +01:00
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STATIC_DESTRUCTOR_REGISTER(arg_interfaces, hashmap_free_free_freep);
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2018-11-26 08:56:58 +01:00
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STATIC_DESTRUCTOR_REGISTER(arg_ignore, strv_freep);
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2018-08-09 10:32:31 +02:00
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static int help(void) {
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_cleanup_free_ char *link = NULL;
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int r;
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r = terminal_urlify_man("systemd-networkd-wait-online.service", "8", &link);
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if (r < 0)
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return log_oom();
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2014-04-24 21:28:46 +02:00
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printf("%s [OPTIONS...]\n\n"
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"Block until network is configured.\n\n"
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" -h --help Show this help\n"
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" --version Print version string\n"
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" -q --quiet Do not show status information\n"
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2020-01-09 21:31:50 +01:00
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" -i --interface=INTERFACE[:MIN_OPERSTATE[:MAX_OPERSTATE]]\n"
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2019-03-06 15:46:33 +01:00
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" Block until at least these interfaces have appeared\n"
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2015-01-29 07:34:34 +01:00
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" --ignore=INTERFACE Don't take these interfaces into account\n"
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2020-01-09 21:31:50 +01:00
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" -o --operational-state=MIN_OPERSTATE[:MAX_OPERSTATE]\n"
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2019-03-06 15:46:33 +01:00
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" Required operational state\n"
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2019-03-31 23:43:48 +02:00
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" --any Wait until at least one of the interfaces is online\n"
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2015-02-01 21:04:35 +01:00
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" --timeout=SECS Maximum time to wait for network connectivity\n"
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2018-08-09 10:32:31 +02:00
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"\nSee the %s for details.\n"
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, program_invocation_short_name
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, link
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);
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return 0;
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2014-04-24 21:28:46 +02:00
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}
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2020-01-09 21:31:50 +01:00
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static int parse_interface_with_operstate_range(const char *str) {
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2019-03-06 15:46:33 +01:00
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_cleanup_free_ char *ifname = NULL;
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2020-01-09 21:31:50 +01:00
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_cleanup_free_ LinkOperationalStateRange *range;
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2019-03-06 15:46:33 +01:00
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const char *p;
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int r;
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assert(str);
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2020-01-09 21:31:50 +01:00
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range = new(LinkOperationalStateRange, 1);
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if (!range)
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return log_oom();
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2019-03-06 15:46:33 +01:00
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p = strchr(str, ':');
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if (p) {
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2020-01-09 21:31:50 +01:00
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r = parse_operational_state_range(p + 1, range);
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if (r < 0)
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log_error_errno(r, "Invalid operational state range '%s'", p + 1);
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2019-03-06 15:46:33 +01:00
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ifname = strndup(optarg, p - optarg);
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} else {
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2020-01-09 21:31:50 +01:00
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range->min = _LINK_OPERSTATE_INVALID;
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range->max = _LINK_OPERSTATE_INVALID;
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2019-03-06 15:46:33 +01:00
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ifname = strdup(str);
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}
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if (!ifname)
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return log_oom();
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if (!ifname_valid(ifname))
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Invalid interface name '%s'", ifname);
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r = hashmap_ensure_allocated(&arg_interfaces, &string_hash_ops);
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if (r < 0)
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return log_oom();
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2020-01-09 21:31:50 +01:00
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r = hashmap_put(arg_interfaces, ifname, TAKE_PTR(range));
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2019-03-06 15:46:33 +01:00
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if (r < 0)
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return log_error_errno(r, "Failed to store interface name: %m");
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if (r == 0)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Interface name %s is already specified", ifname);
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TAKE_PTR(ifname);
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return 0;
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}
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2014-04-24 21:28:46 +02:00
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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2015-01-29 07:34:34 +01:00
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ARG_IGNORE,
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2019-03-31 23:43:48 +02:00
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ARG_ANY,
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2015-02-01 21:04:35 +01:00
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ARG_TIMEOUT,
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2014-04-24 21:28:46 +02:00
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};
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static const struct option options[] = {
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2019-03-06 15:46:33 +01:00
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "quiet", no_argument, NULL, 'q' },
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{ "interface", required_argument, NULL, 'i' },
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{ "ignore", required_argument, NULL, ARG_IGNORE },
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{ "operational-state", required_argument, NULL, 'o' },
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2019-03-31 23:43:48 +02:00
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{ "any", no_argument, NULL, ARG_ANY },
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2019-03-06 15:46:33 +01:00
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{ "timeout", required_argument, NULL, ARG_TIMEOUT },
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2014-04-24 21:28:46 +02:00
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{}
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};
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2015-02-01 21:04:35 +01:00
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int c, r;
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2014-04-24 21:28:46 +02:00
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assert(argc >= 0);
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assert(argv);
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2019-03-06 15:46:33 +01:00
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while ((c = getopt_long(argc, argv, "hi:qo:", options, NULL)) >= 0)
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2014-04-24 21:28:46 +02:00
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switch (c) {
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case 'h':
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2014-08-02 17:12:21 +02:00
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help();
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return 0;
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2014-04-24 21:28:46 +02:00
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case 'q':
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arg_quiet = true;
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break;
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case ARG_VERSION:
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2015-09-23 03:01:06 +02:00
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return version();
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2014-04-24 21:28:46 +02:00
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case 'i':
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2020-01-09 21:31:50 +01:00
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r = parse_interface_with_operstate_range(optarg);
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2019-03-06 15:46:33 +01:00
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if (r < 0)
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return r;
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2014-04-24 21:28:46 +02:00
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break;
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2015-01-29 07:34:34 +01:00
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case ARG_IGNORE:
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if (strv_extend(&arg_ignore, optarg) < 0)
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return log_oom();
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break;
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2019-03-06 15:46:33 +01:00
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case 'o': {
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2020-01-09 21:31:50 +01:00
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LinkOperationalStateRange range;
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r = parse_operational_state_range(optarg, &range);
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if (r < 0)
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return log_error_errno(r, "Invalid operational state range '%s'", optarg);
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2019-03-06 15:46:33 +01:00
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2020-01-09 21:31:50 +01:00
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arg_required_operstate = range;
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2019-03-06 15:46:33 +01:00
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break;
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}
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2019-03-31 23:43:48 +02:00
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case ARG_ANY:
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arg_any = true;
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break;
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2015-02-01 21:04:35 +01:00
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case ARG_TIMEOUT:
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r = parse_sec(optarg, &arg_timeout);
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if (r < 0)
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return r;
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break;
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2014-04-24 21:28:46 +02:00
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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return 1;
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}
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2014-02-28 01:02:01 +01:00
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2018-11-26 08:56:58 +01:00
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static int run(int argc, char *argv[]) {
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2014-07-16 10:52:47 +02:00
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_cleanup_(manager_freep) Manager *m = NULL;
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2020-07-02 14:56:34 +02:00
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_cleanup_(notify_on_cleanup) const char *notify_message = NULL;
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2014-07-16 10:52:47 +02:00
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int r;
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2014-04-24 21:28:46 +02:00
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2018-11-20 11:18:22 +01:00
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log_setup_service();
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2014-02-28 01:02:01 +01:00
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2014-07-16 10:52:47 +02:00
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umask(0022);
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2014-04-24 21:28:46 +02:00
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r = parse_argv(argc, argv);
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if (r <= 0)
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return r;
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2014-02-28 01:02:01 +01:00
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2014-04-24 21:28:46 +02:00
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if (arg_quiet)
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2019-03-06 15:46:33 +01:00
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log_set_max_level(LOG_ERR);
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2014-02-28 01:02:01 +01:00
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2015-06-15 20:13:23 +02:00
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assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
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networkd-wait-online: improve interoptability and enable by default
To make sure we don't delay boot on systems where (some) network links are managed by someone else
we don't block if something else has successfully brought up a link.
We will still block until all links we are aware of that are managed by networkd have been
configured, but if no such links exist, and someone else have configured a link sufficiently
that it has a carrier, it may be that the link is ready so we should no longer block.
Note that in all likelyhood the link is not ready (no addresses/routes configured),
so whatever network managment daemon configured it should provide a similar wait-online
service to block network-online.target until it is ready.
The aim is to block as long as we know networking is not fully configured, but no longer. This
will allow systemd-networkd-wait-online.service to be enabled on any system, even if we don't
know whether networkd is the main/only network manager.
Even in the case networking is fully configured by networkd, the default behavior may not be
sufficient: if two links need to be configured, but the first is fully configured before the
second one appears we will assume the network is up. To work around that, we allow specifying
specific devices to wait for before considering the network up.
This unit is enabled by default, just like systemd-networkd, but will only be pulled in if
anyone pulls in network-online.target.
2014-04-23 17:42:55 +02:00
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2019-03-31 23:43:48 +02:00
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r = manager_new(&m, arg_interfaces, arg_ignore, arg_required_operstate, arg_any, arg_timeout);
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2018-11-26 08:56:58 +01:00
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if (r < 0)
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return log_error_errno(r, "Could not create manager: %m");
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2014-02-28 01:02:01 +01:00
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2019-03-31 23:43:48 +02:00
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if (manager_configured(m))
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2018-11-26 08:56:58 +01:00
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goto success;
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2014-02-28 01:02:01 +01:00
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2018-11-26 08:56:58 +01:00
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notify_message = notify_start("READY=1\n"
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"STATUS=Waiting for network connections...",
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"STATUS=Failed to wait for network connectivity...");
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2014-02-28 01:02:01 +01:00
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networkd-wait-online: improve interoptability and enable by default
To make sure we don't delay boot on systems where (some) network links are managed by someone else
we don't block if something else has successfully brought up a link.
We will still block until all links we are aware of that are managed by networkd have been
configured, but if no such links exist, and someone else have configured a link sufficiently
that it has a carrier, it may be that the link is ready so we should no longer block.
Note that in all likelyhood the link is not ready (no addresses/routes configured),
so whatever network managment daemon configured it should provide a similar wait-online
service to block network-online.target until it is ready.
The aim is to block as long as we know networking is not fully configured, but no longer. This
will allow systemd-networkd-wait-online.service to be enabled on any system, even if we don't
know whether networkd is the main/only network manager.
Even in the case networking is fully configured by networkd, the default behavior may not be
sufficient: if two links need to be configured, but the first is fully configured before the
second one appears we will assume the network is up. To work around that, we allow specifying
specific devices to wait for before considering the network up.
This unit is enabled by default, just like systemd-networkd, but will only be pulled in if
anyone pulls in network-online.target.
2014-04-23 17:42:55 +02:00
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r = sd_event_loop(m->event);
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2018-11-26 08:56:58 +01:00
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if (r < 0)
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return log_error_errno(r, "Event loop failed: %m");
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2015-02-01 21:04:35 +01:00
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2018-11-26 08:56:58 +01:00
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success:
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notify_message = "STATUS=All interfaces configured...";
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2015-02-01 21:04:35 +01:00
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2018-11-26 08:56:58 +01:00
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return 0;
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2014-02-28 01:02:01 +01:00
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}
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2018-11-26 08:56:58 +01:00
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DEFINE_MAIN_FUNCTION(run);
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