src/cgroups-agent/cgroups-agent.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <stdlib.h>
   4
   5 #include "fd-util.h"
   6 #include "log.h"
   7 #include "socket-util.h"
   8
   9 int main(int argc, char *argv[]) {
  10
  11         static const union sockaddr_union sa = {
  12                 .un.sun_family = AF_UNIX,
  13                 .un.sun_path = "/run/systemd/cgroups-agent",
  14         };
  15
  16         _cleanup_close_ int fd = -1;
  17         ssize_t n;
  18         size_t l;
  19
  20         if (argc != 2) {
  21                 log_error("Incorrect number of arguments.");
  22                 return EXIT_FAILURE;
  23         }
  24
  25         log_setup_service();
  26
  27         fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
  28         if (fd < 0) {
  29                 log_debug_errno(errno, "Failed to allocate socket: %m");
  30                 return EXIT_FAILURE;
  31         }
  32
  33         l = strlen(argv[1]);
  34
  35         n = sendto(fd, argv[1], l, 0, &sa.sa, SOCKADDR_UN_LEN(sa.un));
  36         if (n < 0) {
  37                 log_debug_errno(errno, "Failed to send cgroups agent message: %m");
  38                 return EXIT_FAILURE;
  39         }
  40
  41         if ((size_t) n != l) {
  42                 log_debug("Datagram size mismatch");
  43                 return EXIT_FAILURE;
  44         }
  45
  46         return EXIT_SUCCESS;
  47 }