static int loopback_init(void) { loopback_address = inet_addr("127.0.0.1"); loopback_netmask = inet_addr("255.0.0.0"); setup_loopback(); setup_hostname(); connman_utsname_driver_register(&loopback_driver); return 0; }
int main(int argc, char *argv[]) { int rc, i; pid_t pid = -1; pid_t ppid = getpid(); uid_t uid = -1; gid_t gid = -1; _free_ char *user = NULL; _free_ char *dest = NULL; _free_ char *change = NULL; _free_ char *env = NULL; _free_ char *cgroup = NULL; _close_ int master_fd = -1; char *master_name; int detach = 0; int keepenv = 0; siginfo_t status; while ((rc = getopt_long(argc, argv, short_opts, long_opts, &i)) !=-1) { switch (rc) { case 'm': validate_optlist("--mount", optarg); add_mount_from_spec(optarg); break; case 'n': clone_flags |= CLONE_NEWNET; if (optarg != NULL) { validate_optlist("--netif", optarg); add_netif_from_spec(optarg); } break; case 'u': clone_flags |= CLONE_NEWUSER; freep(&user); user = strdup(optarg); break; case 'r': freep(&dest); dest = realpath(optarg, NULL); if (dest == NULL) sysf_printf("realpath()"); break; case 'c': freep(&change); change = strdup(optarg); break; case 'g': validate_optlist("--cgroup", optarg); validate_cgroup_spec(optarg); freep(&change); cgroup = strdup(optarg); break; case 'd': detach = 1; break; case 'a': { char *end = NULL; pid = strtol(optarg, &end, 10); if (*end != '\0') fail_printf("Invalid value '%s' for --attach", optarg); break; } case 's': { validate_optlist("--setenv", optarg); if (env != NULL) { char *tmp = env; rc = asprintf(&env, "%s,%s", env, optarg); if (rc < 0) fail_printf("OOM"); freep(&tmp); } else { env = strdup(optarg); } break; } case 'k': keepenv = 1; break; case 'U': clone_flags &= ~(CLONE_NEWUSER); break; case 'M': clone_flags &= ~(CLONE_NEWNS); break; case 'N': clone_flags &= ~(CLONE_NEWNET); break; case 'I': clone_flags &= ~(CLONE_NEWIPC); break; case 'H': clone_flags &= ~(CLONE_NEWUTS); break; case 'P': clone_flags &= ~(CLONE_NEWPID); break; case '?': case 'h': help(); return 0; } } if (pid != -1) { master_fd = recv_pty(pid); if (master_fd < 0) fail_printf("Invalid PID '%u'", pid); pid = -1; goto process_fd; } if (user == NULL) { user = strdup("root"); if (user == NULL) fail_printf("OOM"); } open_master_pty(&master_fd, &master_name); uid = getuid(); gid = getgid(); if (detach == 1) do_daemonize(); pid = do_clone(); if (pid == 0) { closep(&master_fd); open_slave_pty(master_name); rc = setsid(); if (rc < 0) sysf_printf("setsid()"); rc = prctl(PR_SET_PDEATHSIG, SIGKILL); if (rc < 0) sysf_printf("prctl(PR_SET_PDEATHSIG)"); if (clone_flags & CLONE_NEWUSER) map_user_to_user(uid, gid, user); do_cgroup(cgroup, ppid); do_mount(dest); if (dest != NULL) { copy_nodes(dest); make_ptmx(dest); make_symlinks(dest); make_console(dest, master_name); do_chroot(dest); } if (clone_flags & CLONE_NEWNET) setup_loopback(); umask(0022); /* TODO: drop capabilities */ do_user(user); if (change != NULL) { rc = chdir(change); if (rc < 0) sysf_printf("chdir()"); } if (dest != NULL) { char *term = getenv("TERM"); if (keepenv == 0) clearenv(); setenv("PATH", "/usr/sbin:/usr/bin:/sbin:/bin", 1); setenv("USER", user, 1); setenv("LOGNAME", user, 1); setenv("TERM", term, 1); } if (env != NULL) { size_t i, c; _free_ char **vars = NULL; _free_ char *tmp = strdup(env); if (tmp == NULL) fail_printf("OOM"); c = split_str(tmp, &vars, ","); for (i = 0; i < c; i++) { rc = putenv(strdup(vars[i])); if (rc != 0) sysf_printf("putenv()"); } } setenv("container", "pflask", 1); if (argc > optind) rc = execvpe(argv[optind], argv + optind, environ); else rc = execle("/bin/bash", "-bash", NULL, environ); if (rc < 0) sysf_printf("exec()"); } do_netif(pid); process_fd: if (detach == 1) serve_pty(master_fd); else process_pty(master_fd); if (pid == -1) return 0; kill(pid, SIGKILL); rc = waitid(P_PID, pid, &status, WEXITED); if (rc < 0) sysf_printf("waitid()"); switch (status.si_code) { case CLD_EXITED: if (status.si_status != 0) err_printf("Child failed with code '%d'", status.si_status); else ok_printf("Child exited"); break; case CLD_KILLED: err_printf("Child was terminated"); break; default: err_printf("Child failed"); break; } undo_cgroup(cgroup, ppid); return status.si_status; }