#include "bus-message.h"
#include "bus-util.h"
#include "build.h"
+#include "strv.h"
-#define DEFAULT_BUS_PATH "unix:path=/run/dbus/system_bus_socket"
+#define UNIX_BUS_PATH "unix:path=/run/dbus/system_bus_socket"
+#define KERNEL_BUS_PATH "kernel:path=/dev/kdbus/0-system/bus"
-const char *arg_bus_path = DEFAULT_BUS_PATH;
+#ifdef ENABLE_KDBUS
+# define DEFAULT_BUS_PATH KERNEL_BUS_PATH ";" UNIX_BUS_PATH
+#else
+# define DEFAULT_BUS_PATH UNIX_BUS_PATH
+#endif
+
+static const char *arg_address = DEFAULT_BUS_PATH;
+static char *arg_command_line_buffer = NULL;
static int help(void) {
printf("%s [OPTIONS...]\n\n"
- "STDIO or socket-activatable proxy to a given DBus endpoint.\n\n"
+ "Connect STDIO or a socket to a given bus address.\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);
+ " --address=ADDRESS Connect to the bus specified by ADDRESS\n"
+ " (default: " DEFAULT_BUS_PATH ")\n",
+ program_invocation_short_name);
return 0;
}
enum {
ARG_VERSION = 0x100,
+ ARG_ADDRESS,
};
static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "bus-path", required_argument, NULL, 'p' },
- { NULL, 0, NULL, 0 }
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "address", required_argument, NULL, ARG_ADDRESS },
+ { NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hsup:", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
switch (c) {
puts(SYSTEMD_FEATURES);
return 0;
+ case ARG_ADDRESS:
+ arg_address = optarg;
+ break;
+
case '?':
return -EINVAL;
- case 'p':
- arg_bus_path = optarg;
- break;
-
default:
- log_error("Unknown option code %c", c);
- return -EINVAL;
+ 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 && arg_command_line_buffer[strspn(arg_command_line_buffer, "x")] != 0)) {
+ log_error("Too many arguments");
+ return -EINVAL;
+ }
+
return 1;
}
int main(int argc, char *argv[]) {
+
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
_cleanup_bus_unref_ sd_bus *a = NULL, *b = NULL;
sd_id128_t server_id;
- bool is_unix;
int r, in_fd, out_fd;
+ char **cmdline;
+ const char *comm;
+ bool is_unix;
+ uid_t uid;
+ pid_t pid;
log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
log_parse_environment();
goto finish;
}
- r = sd_bus_set_address(a, arg_bus_path);
+ r = sd_bus_set_address(a, arg_address);
if (r < 0) {
log_error("Failed to set address to connect to: %s", strerror(-r));
goto finish;
goto finish;
}
+ if (sd_bus_get_peer_creds(b, SD_BUS_CREDS_UID|SD_BUS_CREDS_PID|SD_BUS_CREDS_CMDLINE|SD_BUS_CREDS_COMM, &creds) >= 0 &&
+ sd_bus_creds_get_uid(creds, &uid) >= 0 &&
+ sd_bus_creds_get_pid(creds, &pid) >= 0 &&
+ sd_bus_creds_get_cmdline(creds, &cmdline) >= 0 &&
+ sd_bus_creds_get_comm(creds, &comm) >= 0) {
+ _cleanup_free_ char *p = NULL, *name = NULL;
+
+ name = uid_to_name(uid);
+ if (!name) {
+ r = log_oom();
+ goto finish;
+ }
+
+ p = strv_join(cmdline, " ");
+ if (!p) {
+ r = log_oom();
+ goto finish;
+ }
+
+ /* The status string gets the full command line ... */
+ sd_notifyf(false,
+ "STATUS=Processing requests from client PID %lu (%s); UID %lu (%s)",
+ (unsigned long) pid, p,
+ (unsigned long) 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 %lu/%s; UID %lu/%s]",
+ (unsigned long) pid, comm,
+ (unsigned long) uid, name);
+
+ if (m > w)
+ memset(arg_command_line_buffer + w, 0, m - w);
+
+ }
+ }
+
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;
+ struct pollfd *pollfd;
+ int k;
r = sd_bus_process(a, &m);
if (r < 0) {
- log_error("Failed to process bus a: %s", strerror(-r));
+ /* treat 'connection reset by peer' as clean exit condition */
+ if (r == -ECONNRESET)
+ r = 0;
+ else
+ log_error("Failed to process bus a: %s", strerror(-r));
+
goto finish;
}
if (m) {
- r = sd_bus_send(b, m, NULL);
- if (r < 0) {
+ /* We officially got EOF, let's quit */
+ if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) {
+ r = 0;
+ goto finish;
+ }
+
+ k = sd_bus_send(b, m, NULL);
+ if (k < 0) {
+ r = k;
log_error("Failed to send message: %s", strerror(-r));
goto finish;
}
/* treat 'connection reset by peer' as clean exit condition */
if (r == -ECONNRESET)
r = 0;
+ else
+ log_error("Failed to process bus b: %s", strerror(-r));
goto finish;
}
if (m) {
- r = sd_bus_send(a, m, NULL);
- if (r < 0) {
+ /* We officially got EOF, let's quit */
+ if (sd_bus_message_is_signal(m, "org.freedesktop.DBus.Local", "Disconnected")) {
+ r = 0;
+ goto finish;
+ }
+
+ k = sd_bus_send(a, m, NULL);
+ if (k < 0) {
+ r = k;
log_error("Failed to send message: %s", strerror(-r));
goto finish;
}
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, }};
+ pollfd = (struct pollfd[3]) {
+ {.fd = fd, .events = events_a, },
+ {.fd = in_fd, .events = events_b & POLLIN, },
+ {.fd = out_fd, .events = events_b & POLLOUT, }
+ };
- r = ppoll(p, ELEMENTSOF(p), ts, NULL);
- }
+ r = ppoll(pollfd, 3, ts, NULL);
if (r < 0) {
log_error("ppoll() failed: %m");
goto finish;
r = 0;
finish:
+ sd_bus_flush(a);
+ sd_bus_flush(b);
+
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
~ianmdlvl / elogind.git / blobdiff