From f252ff1742947afaf035ae133876a4e767ddeb7c Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Fri, 29 Nov 2013 21:54:44 +0100 Subject: rename stdio-bridge to bus-proxyd --- src/bus-proxyd/Makefile | 1 + src/bus-proxyd/bus-proxyd.c | 310 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 311 insertions(+) create mode 120000 src/bus-proxyd/Makefile create mode 100644 src/bus-proxyd/bus-proxyd.c (limited to 'src/bus-proxyd') diff --git a/src/bus-proxyd/Makefile b/src/bus-proxyd/Makefile new file mode 120000 index 0000000000..d0b0e8e008 --- /dev/null +++ b/src/bus-proxyd/Makefile @@ -0,0 +1 @@ +../Makefile \ No newline at end of file diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c new file mode 100644 index 0000000000..9c49e0ee8d --- /dev/null +++ b/src/bus-proxyd/bus-proxyd.c @@ -0,0 +1,310 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + 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 . +***/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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" + +#define DEFAULT_BUS_PATH "unix:path=/run/dbus/system_bus_socket" + +const char *arg_bus_path = DEFAULT_BUS_PATH; + +static int help(void) { + + printf("%s [OPTIONS...]\n\n" + "STDIO or socket-activatable proxy to a given DBus endpoint.\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --bus-path=PATH Path to the kernel bus (default: %s)\n", + program_invocation_short_name, DEFAULT_BUS_PATH); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "bus-path", required_argument, NULL, 'p' }, + { NULL, 0, NULL, 0 } + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "hsup:", options, NULL)) >= 0) { + + switch (c) { + + case 'h': + help(); + return 0; + + case ARG_VERSION: + puts(PACKAGE_STRING); + puts(SYSTEMD_FEATURES); + return 0; + + case '?': + return -EINVAL; + + case 'p': + arg_bus_path = optarg; + break; + + default: + log_error("Unknown option code %c", c); + return -EINVAL; + } + } + + return 1; +} + +int main(int argc, char *argv[]) { + _cleanup_bus_unref_ sd_bus *a = NULL, *b = NULL; + sd_id128_t server_id; + bool is_unix; + int r, in_fd, out_fd; + + log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + r = sd_listen_fds(0); + if (r == 0) { + in_fd = STDIN_FILENO; + out_fd = STDOUT_FILENO; + } else if (r == 1) { + in_fd = SD_LISTEN_FDS_START; + out_fd = SD_LISTEN_FDS_START; + } else { + log_error("Illegal number of file descriptors passed\n"); + goto finish; + } + + is_unix = + sd_is_socket(in_fd, AF_UNIX, 0, 0) > 0 && + sd_is_socket(out_fd, AF_UNIX, 0, 0) > 0; + + r = sd_bus_new(&a); + if (r < 0) { + log_error("Failed to allocate bus: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_set_address(a, arg_bus_path); + if (r < 0) { + log_error("Failed to set address to connect to: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_negotiate_fds(a, is_unix); + if (r < 0) { + log_error("Failed to set FD negotiation: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_start(a); + if (r < 0) { + log_error("Failed to start bus client: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_get_server_id(a, &server_id); + if (r < 0) { + log_error("Failed to get server ID: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_new(&b); + if (r < 0) { + log_error("Failed to allocate bus: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_set_fd(b, in_fd, out_fd); + if (r < 0) { + log_error("Failed to set fds: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_set_server(b, 1, server_id); + if (r < 0) { + log_error("Failed to set server mode: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_negotiate_fds(b, is_unix); + if (r < 0) { + log_error("Failed to set FD negotiation: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_set_anonymous(b, true); + if (r < 0) { + log_error("Failed to set anonymous authentication: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_start(b); + if (r < 0) { + log_error("Failed to start bus client: %s", strerror(-r)); + goto finish; + } + + for (;;) { + _cleanup_bus_message_unref_ sd_bus_message *m = NULL; + int events_a, events_b, fd; + uint64_t timeout_a, timeout_b, t; + struct timespec _ts, *ts; + + r = sd_bus_process(a, &m); + if (r < 0) { + log_error("Failed to process bus a: %s", strerror(-r)); + goto finish; + } + + if (m) { + r = sd_bus_send(b, m, NULL); + if (r < 0) { + log_error("Failed to send message: %s", strerror(-r)); + goto finish; + } + } + + if (r > 0) + continue; + + r = sd_bus_process(b, &m); + if (r < 0) { + /* treat 'connection reset by peer' as clean exit condition */ + if (r == -ECONNRESET) + r = 0; + + goto finish; + } + + if (m) { + r = sd_bus_send(a, m, NULL); + if (r < 0) { + log_error("Failed to send message: %s", strerror(-r)); + goto finish; + } + } + + if (r > 0) + continue; + + fd = sd_bus_get_fd(a); + if (fd < 0) { + log_error("Failed to get fd: %s", strerror(-r)); + goto finish; + } + + events_a = sd_bus_get_events(a); + if (events_a < 0) { + log_error("Failed to get events mask: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_get_timeout(a, &timeout_a); + if (r < 0) { + log_error("Failed to get timeout: %s", strerror(-r)); + goto finish; + } + + events_b = sd_bus_get_events(b); + if (events_b < 0) { + log_error("Failed to get events mask: %s", strerror(-r)); + goto finish; + } + + r = sd_bus_get_timeout(b, &timeout_b); + if (r < 0) { + log_error("Failed to get timeout: %s", strerror(-r)); + goto finish; + } + + t = timeout_a; + if (t == (uint64_t) -1 || (timeout_b != (uint64_t) -1 && timeout_b < timeout_a)) + t = timeout_b; + + if (t == (uint64_t) -1) + ts = NULL; + else { + usec_t nw; + + nw = now(CLOCK_MONOTONIC); + if (t > nw) + t -= nw; + else + t = 0; + + ts = timespec_store(&_ts, t); + } + + { + struct pollfd p[3] = { + {.fd = fd, .events = events_a, }, + {.fd = STDIN_FILENO, .events = events_b & POLLIN, }, + {.fd = STDOUT_FILENO, .events = events_b & POLLOUT, }}; + + r = ppoll(p, ELEMENTSOF(p), ts, NULL); + } + if (r < 0) { + log_error("ppoll() failed: %m"); + goto finish; + } + } + + r = 0; + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} -- cgit v1.2.3-54-g00ecf