src/journal/journald-wall.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2014 Sebastian Thorarensen
   4 ***/
   5
   6 #include "alloc-util.h"
   7 #include "format-util.h"
   8 #include "journald-server.h"
   9 #include "journald-wall.h"
  10 #include "process-util.h"
  11 #include "string-util.h"
  12 #include "utmp-wtmp.h"
  13
  14 void server_forward_wall(
  15                 Server *s,
  16                 int priority,
  17                 const char *identifier,
  18                 const char *message,
  19                 const struct ucred *ucred) {
  20
  21         _cleanup_free_ char *ident_buf = NULL, *l_buf = NULL;
  22         const char *l;
  23         int r;
  24
  25         assert(s);
  26         assert(message);
  27
  28         if (LOG_PRI(priority) > s->max_level_wall)
  29                 return;
  30
  31         if (ucred) {
  32                 if (!identifier) {
  33                         get_process_comm(ucred->pid, &ident_buf);
  34                         identifier = ident_buf;
  35                 }
  36
  37                 if (asprintf(&l_buf, "%s["PID_FMT"]: %s", strempty(identifier), ucred->pid, message) < 0) {
  38                         log_oom();
  39                         return;
  40                 }
  41
  42                 l = l_buf;
  43
  44         } else if (identifier) {
  45
  46                 l = l_buf = strjoin(identifier, ": ", message);
  47                 if (!l_buf) {
  48                         log_oom();
  49                         return;
  50                 }
  51         } else
  52                 l = message;
  53
  54         r = utmp_wall(l, "systemd-journald", NULL, NULL, NULL);
  55         if (r < 0)
  56                 log_debug_errno(r, "Failed to send wall message: %m");
  57 }