| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <netinet/in.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #include "sd-daemon.h" |
| #include "sd-event.h" |
| |
| #include "capability-util.h" |
| #include "daemon-util.h" |
| #include "main-func.h" |
| #include "mkdir.h" |
| #include "networkd-conf.h" |
| #include "networkd-manager.h" |
| #include "signal-util.h" |
| #include "user-util.h" |
| |
| static int run(int argc, char *argv[]) { |
| _cleanup_(manager_freep) Manager *m = NULL; |
| _cleanup_(notify_on_cleanup) const char *notify_message = NULL; |
| int r; |
| |
| log_setup_service(); |
| |
| umask(0022); |
| |
| if (argc != 1) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments."); |
| |
| /* Drop privileges, but only if we have been started as root. If we are not running as root we assume all |
| * privileges are already dropped and we can't create our runtime directory. */ |
| if (geteuid() == 0) { |
| const char *user = "systemd-network"; |
| uid_t uid; |
| gid_t gid; |
| |
| r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0); |
| if (r < 0) |
| return log_error_errno(r, "Cannot resolve user name %s: %m", user); |
| |
| /* Create runtime directory. This is not necessary when networkd is |
| * started with "RuntimeDirectory=systemd/netif", or after |
| * systemd-tmpfiles-setup.service. */ |
| r = mkdir_safe_label("/run/systemd/netif", 0755, uid, gid, MKDIR_WARN_MODE); |
| if (r < 0) |
| log_warning_errno(r, "Could not create runtime directory: %m"); |
| |
| r = drop_privileges(uid, gid, |
| (1ULL << CAP_NET_ADMIN) | |
| (1ULL << CAP_NET_BIND_SERVICE) | |
| (1ULL << CAP_NET_BROADCAST) | |
| (1ULL << CAP_NET_RAW)); |
| if (r < 0) |
| return log_error_errno(r, "Failed to drop privileges: %m"); |
| } |
| |
| /* Always create the directories people can create inotify watches in. |
| * It is necessary to create the following subdirectories after drop_privileges() |
| * to support old kernels not supporting AmbientCapabilities=. */ |
| r = mkdir_safe_label("/run/systemd/netif/links", 0755, UID_INVALID, GID_INVALID, MKDIR_WARN_MODE); |
| if (r < 0) |
| log_warning_errno(r, "Could not create runtime directory 'links': %m"); |
| |
| r = mkdir_safe_label("/run/systemd/netif/leases", 0755, UID_INVALID, GID_INVALID, MKDIR_WARN_MODE); |
| if (r < 0) |
| log_warning_errno(r, "Could not create runtime directory 'leases': %m"); |
| |
| r = mkdir_safe_label("/run/systemd/netif/lldp", 0755, UID_INVALID, GID_INVALID, MKDIR_WARN_MODE); |
| if (r < 0) |
| log_warning_errno(r, "Could not create runtime directory 'lldp': %m"); |
| |
| assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); |
| |
| r = manager_new(&m); |
| if (r < 0) |
| return log_error_errno(r, "Could not create manager: %m"); |
| |
| r = manager_connect_bus(m); |
| if (r < 0) |
| return log_error_errno(r, "Could not connect to bus: %m"); |
| |
| r = manager_parse_config_file(m); |
| if (r < 0) |
| log_warning_errno(r, "Failed to parse configuration file: %m"); |
| |
| r = manager_load_config(m); |
| if (r < 0) |
| return log_error_errno(r, "Could not load configuration files: %m"); |
| |
| r = manager_enumerate(m); |
| if (r < 0) |
| return r; |
| |
| r = manager_start(m); |
| if (r < 0) |
| return log_error_errno(r, "Could not start manager: %m"); |
| |
| log_info("Enumeration completed"); |
| |
| notify_message = notify_start(NOTIFY_READY, NOTIFY_STOPPING); |
| |
| r = sd_event_loop(m->event); |
| if (r < 0) |
| return log_error_errno(r, "Event loop failed: %m"); |
| |
| return 0; |
| } |
| |
| DEFINE_MAIN_FUNCTION(run); |