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git.ipfire.org Git - thirdparty/systemd.git/blob - src/network/networkd.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
6 #include "capability-util.h"
7 #include "daemon-util.h"
10 #include "networkd-conf.h"
11 #include "networkd-manager.h"
12 #include "signal-util.h"
13 #include "user-util.h"
15 static int run(int argc
, char *argv
[]) {
16 _cleanup_(notify_on_cleanup
) const char *notify_message
= NULL
;
17 _cleanup_(manager_freep
) Manager
*m
= NULL
;
18 const char *user
= "systemd-network";
28 return log_error_errno(SYNTHETIC_ERRNO(EINVAL
), "This program takes no arguments.");
30 r
= get_user_creds(&user
, &uid
, &gid
, NULL
, NULL
, 0);
32 return log_error_errno(r
, "Cannot resolve user name %s: %m", user
);
34 /* Create runtime directory. This is not necessary when networkd is
35 * started with "RuntimeDirectory=systemd/netif", or after
36 * systemd-tmpfiles-setup.service. */
37 r
= mkdir_safe_label("/run/systemd/netif", 0755, uid
, gid
, MKDIR_WARN_MODE
);
39 log_warning_errno(r
, "Could not create runtime directory: %m");
41 /* Drop privileges, but only if we have been started as root. If we are not running as root we assume all
42 * privileges are already dropped. */
44 r
= drop_privileges(uid
, gid
,
45 (1ULL << CAP_NET_ADMIN
) |
46 (1ULL << CAP_NET_BIND_SERVICE
) |
47 (1ULL << CAP_NET_BROADCAST
) |
48 (1ULL << CAP_NET_RAW
));
50 return log_error_errno(r
, "Failed to drop privileges: %m");
53 /* Always create the directories people can create inotify watches in.
54 * It is necessary to create the following subdirectories after drop_privileges()
55 * to support old kernels not supporting AmbientCapabilities=. */
56 r
= mkdir_safe_label("/run/systemd/netif/links", 0755, uid
, gid
, MKDIR_WARN_MODE
);
58 log_warning_errno(r
, "Could not create runtime directory 'links': %m");
60 r
= mkdir_safe_label("/run/systemd/netif/leases", 0755, uid
, gid
, MKDIR_WARN_MODE
);
62 log_warning_errno(r
, "Could not create runtime directory 'leases': %m");
64 r
= mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid
, gid
, MKDIR_WARN_MODE
);
66 log_warning_errno(r
, "Could not create runtime directory 'lldp': %m");
68 assert_se(sigprocmask_many(SIG_BLOCK
, NULL
, SIGTERM
, SIGINT
, -1) >= 0);
72 return log_error_errno(r
, "Could not create manager: %m");
74 r
= manager_connect_bus(m
);
76 return log_error_errno(r
, "Could not connect to bus: %m");
78 r
= manager_parse_config_file(m
);
80 log_warning_errno(r
, "Failed to parse configuration file: %m");
82 r
= manager_load_config(m
);
84 return log_error_errno(r
, "Could not load configuration files: %m");
86 r
= manager_rtnl_enumerate_links(m
);
88 return log_error_errno(r
, "Could not enumerate links: %m");
90 r
= manager_rtnl_enumerate_addresses(m
);
92 return log_error_errno(r
, "Could not enumerate addresses: %m");
94 r
= manager_rtnl_enumerate_routes(m
);
96 return log_error_errno(r
, "Could not enumerate routes: %m");
98 r
= manager_rtnl_enumerate_rules(m
);
100 return log_error_errno(r
, "Could not enumerate rules: %m");
102 r
= manager_start(m
);
104 return log_error_errno(r
, "Could not start manager: %m");
106 log_info("Enumeration completed");
108 notify_message
= notify_start(NOTIFY_READY
, NOTIFY_STOPPING
);
110 r
= sd_event_loop(m
->event
);
112 return log_error_errno(r
, "Event loop failed: %m");
117 DEFINE_MAIN_FUNCTION(run
);