8e766630f0
This drops a good number of type-specific _cleanup_ macros, and patches all users to just use the generic ones. In most recent code we abstained from defining type-specific macros, and this basically removes all those added already, with the exception of the really low-level ones. Having explicit macros for this is not too useful, as the expression without the extra macro is generally just 2ch wider. We should generally emphesize generic code, unless there are really good reasons for specific code, hence let's follow this in this case too. Note that _cleanup_free_ and similar really low-level, libc'ish, Linux API'ish macros continue to be defined, only the really high-level OO ones are dropped. From now on this should really be the rule: for really low-level stuff, such as memory allocation, fd handling and so one, go ahead and define explicit per-type macros, but for high-level, specific program code, just use the generic _cleanup_() macro directly, in order to keep things simple and as readable as possible for the uninitiated. Note that before this patch some of the APIs (notable libudev ones) were already used with the high-level macros at some places and with the generic _cleanup_ macro at others. With this patch we hence unify on the latter.
159 lines
5 KiB
C
159 lines
5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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***/
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#include "sd-daemon.h"
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#include "sd-event.h"
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#include "capability-util.h"
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#include "networkd-conf.h"
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#include "networkd-manager.h"
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#include "signal-util.h"
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#include "user-util.h"
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int main(int argc, char *argv[]) {
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sd_event *event = NULL;
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_cleanup_(manager_freep) Manager *m = NULL;
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const char *user = "systemd-network";
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uid_t uid;
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gid_t gid;
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int r;
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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if (argc != 1) {
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log_error("This program takes no arguments.");
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r = -EINVAL;
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goto out;
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}
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r = get_user_creds(&user, &uid, &gid, NULL, NULL);
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if (r < 0) {
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log_error_errno(r, "Cannot resolve user name %s: %m", user);
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goto out;
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}
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/* Create runtime directory. This is not necessary when networkd is
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* started with "RuntimeDirectory=systemd/netif", or after
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* systemd-tmpfiles-setup.service. */
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r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid, MKDIR_WARN_MODE);
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if (r < 0)
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log_warning_errno(r, "Could not create runtime directory: %m");
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/* Drop privileges, but only if we have been started as root. If we are not running as root we assume all
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* privileges are already dropped. */
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if (geteuid() == 0) {
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r = drop_privileges(uid, gid,
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(1ULL << CAP_NET_ADMIN) |
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(1ULL << CAP_NET_BIND_SERVICE) |
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(1ULL << CAP_NET_BROADCAST) |
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(1ULL << CAP_NET_RAW));
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if (r < 0)
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goto out;
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}
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/* Always create the directories people can create inotify watches in.
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* It is necessary to create the following subdirectories after drop_privileges()
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* to support old kernels not supporting AmbientCapabilities=. */
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r = mkdir_safe_label("/run/systemd/netif/links", 0755, uid, gid, MKDIR_WARN_MODE);
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if (r < 0)
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log_warning_errno(r, "Could not create runtime directory 'links': %m");
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r = mkdir_safe_label("/run/systemd/netif/leases", 0755, uid, gid, MKDIR_WARN_MODE);
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if (r < 0)
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log_warning_errno(r, "Could not create runtime directory 'leases': %m");
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r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, uid, gid, MKDIR_WARN_MODE);
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if (r < 0)
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log_warning_errno(r, "Could not create runtime directory 'lldp': %m");
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assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
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r = sd_event_default(&event);
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if (r < 0)
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goto out;
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sd_event_set_watchdog(event, true);
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sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
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sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
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r = manager_new(&m, event);
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if (r < 0) {
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log_error_errno(r, "Could not create manager: %m");
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goto out;
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}
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r = manager_connect_bus(m);
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if (r < 0) {
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log_error_errno(r, "Could not connect to bus: %m");
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goto out;
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}
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r = manager_parse_config_file(m);
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if (r < 0)
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log_warning_errno(r, "Failed to parse configuration file: %m");
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r = manager_load_config(m);
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if (r < 0) {
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log_error_errno(r, "Could not load configuration files: %m");
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goto out;
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}
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r = manager_rtnl_enumerate_links(m);
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if (r < 0) {
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log_error_errno(r, "Could not enumerate links: %m");
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goto out;
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}
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r = manager_rtnl_enumerate_addresses(m);
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if (r < 0) {
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log_error_errno(r, "Could not enumerate addresses: %m");
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goto out;
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}
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r = manager_rtnl_enumerate_routes(m);
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if (r < 0) {
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log_error_errno(r, "Could not enumerate routes: %m");
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goto out;
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}
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r = manager_rtnl_enumerate_rules(m);
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if (r < 0) {
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log_error_errno(r, "Could not enumerate rules: %m");
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goto out;
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}
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r = manager_start(m);
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if (r < 0) {
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log_error_errno(r, "Could not start manager: %m");
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goto out;
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}
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log_info("Enumeration completed");
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sd_notify(false,
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"READY=1\n"
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"STATUS=Processing requests...");
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r = sd_event_loop(event);
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if (r < 0) {
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log_error_errno(r, "Event loop failed: %m");
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goto out;
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}
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out:
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sd_notify(false,
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"STOPPING=1\n"
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"STATUS=Shutting down...");
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sd_event_unref(event);
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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