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From 25e4d71e788ee7467e1d764c631de44d599e2b1c Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Fri, 13 Jan 2023 14:12:31 +0900
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Subject: [PATCH] busctl: fix introspecting DBus properties
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Follow-up for f2f7785d7a47ffa48ac929648794e1288509ddd8.
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Fixes #26033.
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(cherry picked from commit 2cbb171d20a07ec0a25296f167b0385de102d74e)
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Related: #2138081
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---
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src/busctl/busctl.c | 21 +++++++++++++++++++--
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1 file changed, 19 insertions(+), 2 deletions(-)
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diff --git a/src/busctl/busctl.c b/src/busctl/busctl.c
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index f57a5d605d..cc2d0e3458 100644
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--- a/src/busctl/busctl.c
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+++ b/src/busctl/busctl.c
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@@ -1022,10 +1022,11 @@ static int introspect(int argc, char **argv, void *userdata) {
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for (;;) {
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Member *z;
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- _cleanup_free_ char *buf = NULL;
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+ _cleanup_free_ char *buf = NULL, *signature = NULL;
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_cleanup_fclose_ FILE *mf = NULL;
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size_t sz = 0;
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- const char *name;
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+ const char *name, *contents;
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+ char type;
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r = sd_bus_message_enter_container(reply, 'e', "sv");
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if (r < 0)
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@@ -1042,6 +1043,21 @@ static int introspect(int argc, char **argv, void *userdata) {
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if (r < 0)
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return bus_log_parse_error(r);
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+ r = sd_bus_message_peek_type(reply, &type, &contents);
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+ if (r <= 0)
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+ return bus_log_parse_error(r == 0 ? EINVAL : r);
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+
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+ if (type == SD_BUS_TYPE_STRUCT_BEGIN)
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+ signature = strjoin(CHAR_TO_STR(SD_BUS_TYPE_STRUCT_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_STRUCT_END));
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+ else if (type == SD_BUS_TYPE_DICT_ENTRY_BEGIN)
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+ signature = strjoin(CHAR_TO_STR(SD_BUS_TYPE_DICT_ENTRY_BEGIN), contents, CHAR_TO_STR(SD_BUS_TYPE_DICT_ENTRY_END));
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+ else if (contents)
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+ signature = strjoin(CHAR_TO_STR(type), contents);
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+ else
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+ signature = strdup(CHAR_TO_STR(type));
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+ if (!signature)
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+ return log_oom();
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+
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mf = open_memstream_unlocked(&buf, &sz);
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if (!mf)
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return log_oom();
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@@ -1055,6 +1071,7 @@ static int introspect(int argc, char **argv, void *userdata) {
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z = set_get(members, &((Member) {
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.type = "property",
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.interface = m->interface,
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+ .signature = signature,
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.name = (char*) name }));
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if (z)
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free_and_replace(z->value, buf);
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