+static int format_cmdline(sd_bus_message *m, FILE *f, bool needs_space) {
+ int r;
+
+ for (;;) {
+ const char *contents = NULL;
+ char type;
+ union {
+ uint8_t u8;
+ uint16_t u16;
+ int16_t s16;
+ uint32_t u32;
+ int32_t s32;
+ uint64_t u64;
+ int64_t s64;
+ double d64;
+ const char *string;
+ int i;
+ } basic;
+
+ r = sd_bus_message_peek_type(m, &type, &contents);
+ if (r <= 0)
+ return r;
+
+ if (bus_type_is_container(type) > 0) {
+
+ r = sd_bus_message_enter_container(m, type, contents);
+ if (r < 0)
+ return r;
+
+ if (type == SD_BUS_TYPE_ARRAY) {
+ unsigned n = 0;
+
+ /* count array entries */
+ for (;;) {
+
+ r = sd_bus_message_skip(m, contents);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ n++;
+ }
+
+ r = sd_bus_message_rewind(m, false);
+ if (r < 0)
+ return r;
+
+ if (needs_space)
+ fputc(' ', f);
+
+ fprintf(f, "%u", n);
+ } else if (type == SD_BUS_TYPE_VARIANT) {
+
+ if (needs_space)
+ fputc(' ', f);
+
+ fprintf(f, "%s", contents);
+ }
+
+ r = format_cmdline(m, f, true);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ continue;
+ }
+
+ r = sd_bus_message_read_basic(m, type, &basic);
+ if (r < 0)
+ return r;
+
+ if (needs_space)
+ fputc(' ', f);
+
+ switch (type) {
+ case SD_BUS_TYPE_BYTE:
+ fprintf(f, "%u", basic.u8);
+ break;
+
+ case SD_BUS_TYPE_BOOLEAN:
+ fputs(true_false(basic.i), f);
+ break;
+
+ case SD_BUS_TYPE_INT16:
+ fprintf(f, "%i", basic.s16);
+ break;
+
+ case SD_BUS_TYPE_UINT16:
+ fprintf(f, "%u", basic.u16);
+ break;
+
+ case SD_BUS_TYPE_INT32:
+ fprintf(f, "%i", basic.s32);
+ break;
+
+ case SD_BUS_TYPE_UINT32:
+ fprintf(f, "%u", basic.u32);
+ break;
+
+ case SD_BUS_TYPE_INT64:
+ fprintf(f, "%" PRIi64, basic.s64);
+ break;
+
+ case SD_BUS_TYPE_UINT64:
+ fprintf(f, "%" PRIu64, basic.u64);
+ break;
+
+ case SD_BUS_TYPE_DOUBLE:
+ fprintf(f, "%g", basic.d64);
+ break;
+
+ case SD_BUS_TYPE_STRING:
+ case SD_BUS_TYPE_OBJECT_PATH:
+ case SD_BUS_TYPE_SIGNATURE: {
+ _cleanup_free_ char *b = NULL;
+
+ b = cescape(basic.string);
+ if (!b)
+ return -ENOMEM;
+
+ fprintf(f, "\"%s\"", b);
+ break;
+ }
+
+ case SD_BUS_TYPE_UNIX_FD:
+ fprintf(f, "%i", basic.i);
+ break;
+
+ default:
+ assert_not_reached("Unknown basic type.");
+ }
+
+ }
+}
+