1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3 #include "sd-bus.h"
4
5 #include "analyze-dump.h"
6 #include "analyze.h"
7 #include "bus-error.h"
8 #include "bus-locator.h"
9 #include "bus-util.h"
10 #include "copy.h"
11
dump_fallback(sd_bus * bus)12 static int dump_fallback(sd_bus *bus) {
13 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
14 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
15 const char *text = NULL;
16 int r;
17
18 assert(bus);
19
20 r = bus_call_method(bus, bus_systemd_mgr, "Dump", &error, &reply, NULL);
21 if (r < 0)
22 return log_error_errno(r, "Failed to issue method call Dump: %s", bus_error_message(&error, r));
23
24 r = sd_bus_message_read(reply, "s", &text);
25 if (r < 0)
26 return bus_log_parse_error(r);
27
28 fputs(text, stdout);
29 return 0;
30 }
31
verb_dump(int argc,char * argv[],void * userdata)32 int verb_dump(int argc, char *argv[], void *userdata) {
33 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
34 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
35 _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
36 int fd = -1;
37 int r;
38
39 r = acquire_bus(&bus, NULL);
40 if (r < 0)
41 return bus_log_connect_error(r, arg_transport);
42
43 pager_open(arg_pager_flags);
44
45 if (!sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD))
46 return dump_fallback(bus);
47
48 r = bus_call_method(bus, bus_systemd_mgr, "DumpByFileDescriptor", &error, &reply, NULL);
49 if (r < 0) {
50 /* fall back to Dump if DumpByFileDescriptor is not supported */
51 if (!IN_SET(r, -EACCES, -EBADR))
52 return log_error_errno(r, "Failed to issue method call DumpByFileDescriptor: %s",
53 bus_error_message(&error, r));
54
55 return dump_fallback(bus);
56 }
57
58 r = sd_bus_message_read(reply, "h", &fd);
59 if (r < 0)
60 return bus_log_parse_error(r);
61
62 fflush(stdout);
63 return copy_bytes(fd, STDOUT_FILENO, UINT64_MAX, 0);
64 }
65