src/journal/journald-wall.c

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