+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+ Copyright 2013 Daniel Mack
+ Copyright 2014 Kay Sievers
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/poll.h>
+#include <stddef.h>
+#include <getopt.h>
+
+#include "log.h"
+#include "util.h"
+#include "socket-util.h"
+#include "sd-daemon.h"
+#include "sd-bus.h"
+#include "bus-internal.h"
+#include "bus-message.h"
+#include "bus-util.h"
+#include "build.h"
+#include "strv.h"
+#include "def.h"
+#include "capability.h"
+#include "bus-control.h"
+#include "smack-util.h"
+#include "set.h"
+#include "bus-xml-policy.h"
+#include "driver.h"
+#include "proxy.h"
+#include "synthesize.h"
+
+static char *arg_address = NULL;
+static char *arg_command_line_buffer = NULL;
+static char **arg_configuration = NULL;
+
+static int help(void) {
+
+ printf("%s [OPTIONS...]\n\n"
+ "Connect STDIO to a given bus address.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --configuration=PATH Configuration file or directory\n"
+ " --machine=MACHINE Connect to specified machine\n"
+ " --address=ADDRESS Connect to the bus specified by ADDRESS\n"
+ " (default: " DEFAULT_SYSTEM_BUS_ADDRESS ")\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_ADDRESS,
+ ARG_CONFIGURATION,
+ ARG_MACHINE,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "address", required_argument, NULL, ARG_ADDRESS },
+ { "configuration", required_argument, NULL, ARG_CONFIGURATION },
+ { "machine", required_argument, NULL, ARG_MACHINE },
+ {},
+ };
+
+ int c, r;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_ADDRESS: {
+ char *a;
+
+ a = strdup(optarg);
+ if (!a)
+ return log_oom();
+
+ free(arg_address);
+ arg_address = a;
+ break;
+ }
+
+ case ARG_CONFIGURATION:
+ r = strv_extend(&arg_configuration, optarg);
+ if (r < 0)
+ return log_oom();
+ break;
+
+ case ARG_MACHINE: {
+ _cleanup_free_ char *e = NULL;
+ char *a;
+
+ e = bus_address_escape(optarg);
+ if (!e)
+ return log_oom();
+
+#ifdef ENABLE_KDBUS
+ a = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
+#else
+ a = strjoin("x-machine-unix:machine=", e, NULL);
+#endif
+ if (!a)
+ return log_oom();
+
+ free(arg_address);
+ arg_address = a;
+
+ break;
+ }
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ /* If the first command line argument is only "x" characters
+ * we'll write who we are talking to into it, so that "ps" is
+ * explanatory */
+ arg_command_line_buffer = argv[optind];
+ if (argc > optind + 1 || (arg_command_line_buffer && !in_charset(arg_command_line_buffer, "x"))) {
+ log_error("Too many arguments");
+ return -EINVAL;
+ }
+
+ if (!arg_address) {
+ arg_address = strdup(DEFAULT_SYSTEM_BUS_ADDRESS);
+ if (!arg_address)
+ return log_oom();
+ }
+
+ return 1;
+}
+
+static int rename_service(sd_bus *a, sd_bus *b) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ _cleanup_free_ char *p = NULL, *name = NULL;
+ const char *comm;
+ char **cmdline;
+ uid_t uid;
+ pid_t pid;
+ int r;
+
+ assert(a);
+ assert(b);
+
+ r = sd_bus_get_owner_creds(b, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_CMDLINE|SD_BUS_CREDS_COMM|SD_BUS_CREDS_AUGMENT, &creds);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_uid(creds, &uid);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_pid(creds, &pid);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_cmdline(creds, &cmdline);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_creds_get_comm(creds, &comm);
+ if (r < 0)
+ return r;
+
+ name = uid_to_name(uid);
+ if (!name)
+ return -ENOMEM;
+
+ p = strv_join(cmdline, " ");
+ if (!p)
+ return -ENOMEM;
+
+ /* The status string gets the full command line ... */
+ sd_notifyf(false,
+ "STATUS=Processing requests from client PID "PID_FMT" (%s); UID "UID_FMT" (%s)",
+ pid, p,
+ uid, name);
+
+ /* ... and the argv line only the short comm */
+ if (arg_command_line_buffer) {
+ size_t m, w;
+
+ m = strlen(arg_command_line_buffer);
+ w = snprintf(arg_command_line_buffer, m,
+ "[PID "PID_FMT"/%s; UID "UID_FMT"/%s]",
+ pid, comm,
+ uid, name);
+
+ if (m > w)
+ memzero(arg_command_line_buffer + w, m - w);
+ }
+
+ log_debug("Running on behalf of PID "PID_FMT" (%s), UID "UID_FMT" (%s), %s",
+ pid, p,
+ uid, name,
+ a->unique_name);
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_(proxy_freep) Proxy *p = NULL;
+ int r;
+
+ log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ r = proxy_new(&p, STDIN_FILENO, STDOUT_FILENO, arg_address);
+ if (r < 0)
+ goto finish;
+
+ r = proxy_load_policy(p, arg_configuration);
+ if (r < 0)
+ goto finish;
+
+ r = proxy_hello_policy(p, getuid());
+ if (r < 0)
+ goto finish;
+
+ r = rename_service(p->dest_bus, p->local_bus);
+ if (r < 0)
+ log_debug_errno(r, "Failed to rename process: %m");
+
+ r = proxy_run(p);
+
+finish:
+ sd_notify(false,
+ "STOPPING=1\n"
+ "STATUS=Shutting down.");
+
+ strv_free(arg_configuration);
+ free(arg_address);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
~ianmdlvl / elogind.git / commitdiff