src/libsystemd/sd-bus/test-bus-kernel.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <fcntl.h>
  21
  22 #include "sd-bus.h"
  23
  24 #include "alloc-util.h"
  25 #include "bus-dump.h"
  26 #include "bus-kernel.h"
  27 #include "bus-util.h"
  28 #include "fd-util.h"
  29 #include "log.h"
  30 #include "util.h"
  31
  32 int main(int argc, char *argv[]) {
  33         _cleanup_close_ int bus_ref = -1;
  34         _cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL, *bname = NULL;
  35         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
  36         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
  37         const char *ua = NULL, *ub = NULL, *the_string = NULL;
  38         sd_bus *a, *b;
  39         int r, pipe_fds[2];
  40         const char *nn;
  41
  42         log_set_max_level(LOG_DEBUG);
  43
  44         assert_se(asprintf(&name, "deine-mutter-%u", (unsigned) getpid()) >= 0);
  45
  46         bus_ref = bus_kernel_create_bus(name, false, &bus_name);
  47         if (bus_ref == -ENOENT)
  48                 return EXIT_TEST_SKIP;
  49
  50         assert_se(bus_ref >= 0);
  51
  52         address = strappend("kernel:path=", bus_name);
  53         assert_se(address);
  54
  55         r = sd_bus_new(&a);
  56         assert_se(r >= 0);
  57
  58         r = sd_bus_new(&b);
  59         assert_se(r >= 0);
  60
  61         r = sd_bus_set_description(a, "a");
  62         assert_se(r >= 0);
  63
  64         r = sd_bus_set_address(a, address);
  65         assert_se(r >= 0);
  66
  67         r = sd_bus_set_address(b, address);
  68         assert_se(r >= 0);
  69
  70         assert_se(sd_bus_negotiate_timestamp(a, 1) >= 0);
  71         assert_se(sd_bus_negotiate_creds(a, true, _SD_BUS_CREDS_ALL) >= 0);
  72
  73         assert_se(sd_bus_negotiate_timestamp(b, 0) >= 0);
  74         assert_se(sd_bus_negotiate_creds(b, true, 0) >= 0);
  75
  76         r = sd_bus_start(a);
  77         assert_se(r >= 0);
  78
  79         r = sd_bus_start(b);
  80         assert_se(r >= 0);
  81
  82         assert_se(sd_bus_negotiate_timestamp(b, 1) >= 0);
  83         assert_se(sd_bus_negotiate_creds(b, true, _SD_BUS_CREDS_ALL) >= 0);
  84
  85         r = sd_bus_get_unique_name(a, &ua);
  86         assert_se(r >= 0);
  87         printf("unique a: %s\n", ua);
  88
  89         r = sd_bus_get_description(a, &nn);
  90         assert_se(r >= 0);
  91         printf("name of a: %s\n", nn);
  92
  93         r = sd_bus_get_unique_name(b, &ub);
  94         assert_se(r >= 0);
  95         printf("unique b: %s\n", ub);
  96
  97         r = sd_bus_get_description(b, &nn);
  98         assert_se(r >= 0);
  99         printf("name of b: %s\n", nn);
 100
 101         assert_se(bus_kernel_get_bus_name(b, &bname) >= 0);
 102         assert_se(endswith(bname, name));
 103
 104         r = sd_bus_call_method(a, "this.doesnt.exist", "/foo", "meh.mah", "muh", &error, NULL, "s", "yayayay");
 105         assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_SERVICE_UNKNOWN));
 106         assert_se(r == -EHOSTUNREACH);
 107
 108         r = sd_bus_add_match(b, NULL, "interface='waldo.com',member='Piep'", NULL, NULL);
 109         assert_se(r >= 0);
 110
 111         r = sd_bus_emit_signal(a, "/foo/bar/waldo", "waldo.com", "Piep", "sss", "I am a string", "/this/is/a/path", "and.this.a.domain.name");
 112         assert_se(r >= 0);
 113
 114         r = sd_bus_try_close(b);
 115         assert_se(r == -EBUSY);
 116
 117         r = sd_bus_process_priority(b, -10, &m);
 118         assert_se(r == 0);
 119
 120         r = sd_bus_process(b, &m);
 121         assert_se(r > 0);
 122         assert_se(m);
 123
 124         bus_message_dump(m, stdout, BUS_MESSAGE_DUMP_WITH_HEADER);
 125         assert_se(sd_bus_message_rewind(m, true) >= 0);
 126
 127         r = sd_bus_message_read(m, "s", &the_string);
 128         assert_se(r >= 0);
 129         assert_se(streq(the_string, "I am a string"));
 130
 131         sd_bus_message_unref(m);
 132         m = NULL;
 133
 134         r = sd_bus_request_name(a, "net.x0pointer.foobar", 0);
 135         assert_se(r >= 0);
 136
 137         r = sd_bus_message_new_method_call(b, &m, "net.x0pointer.foobar", "/a/path", "an.inter.face", "AMethod");
 138         assert_se(r >= 0);
 139
 140         assert_se(pipe2(pipe_fds, O_CLOEXEC) >= 0);
 141
 142         assert_se(write(pipe_fds[1], "x", 1) == 1);
 143
 144         pipe_fds[1] = safe_close(pipe_fds[1]);
 145
 146         r = sd_bus_message_append(m, "h", pipe_fds[0]);
 147         assert_se(r >= 0);
 148
 149         pipe_fds[0] = safe_close(pipe_fds[0]);
 150
 151         r = sd_bus_send(b, m, NULL);
 152         assert_se(r >= 0);
 153
 154         for (;;) {
 155                 sd_bus_message_unref(m);
 156                 m = NULL;
 157                 r = sd_bus_process(a, &m);
 158                 assert_se(r > 0);
 159                 assert_se(m);
 160
 161                 bus_message_dump(m, stdout, BUS_MESSAGE_DUMP_WITH_HEADER);
 162                 assert_se(sd_bus_message_rewind(m, true) >= 0);
 163
 164                 if (sd_bus_message_is_method_call(m, "an.inter.face", "AMethod")) {
 165                         int fd;
 166                         char x;
 167
 168                         r = sd_bus_message_read(m, "h", &fd);
 169                         assert_se(r >= 0);
 170
 171                         assert_se(read(fd, &x, 1) == 1);
 172                         assert_se(x == 'x');
 173                         break;
 174                 }
 175         }
 176
 177         r = sd_bus_release_name(a, "net.x0pointer.foobar");
 178         assert_se(r >= 0);
 179
 180         r = sd_bus_release_name(a, "net.x0pointer.foobar");
 181         assert_se(r == -ESRCH);
 182
 183         r = sd_bus_try_close(a);
 184         assert_se(r >= 0);
 185
 186         sd_bus_unref(a);
 187         sd_bus_unref(b);
 188
 189         return 0;
 190 }