src/systemctl/systemctl-kill.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "sd-bus.h"
   4
   5 #include "bus-error.h"
   6 #include "bus-locator.h"
   7 #include "bus-wait-for-units.h"
   8 #include "errno-util.h"
   9 #include "log.h"
  10 #include "string-util.h"
  11 #include "strv.h"
  12 #include "systemctl.h"
  13 #include "systemctl-kill.h"
  14 #include "systemctl-util.h"
  15
  16 int verb_kill(int argc, char *argv[], void *userdata) {
  17         _cleanup_(bus_wait_for_units_freep) BusWaitForUnits *w = NULL;
  18         _cleanup_strv_free_ char **names = NULL;
  19         const char *kill_whom;
  20         sd_bus *bus;
  21         int r, q;
  22
  23         r = acquire_bus(BUS_MANAGER, &bus);
  24         if (r < 0)
  25                 return r;
  26
  27         if (arg_wait) {
  28                 r = bus_wait_for_units_new(bus, &w);
  29                 if (r < 0)
  30                         return log_error_errno(r, "Failed to allocate unit watch context: %m");
  31         }
  32
  33         polkit_agent_open_maybe();
  34
  35         kill_whom = arg_kill_whom ?: "all";
  36
  37         /* --fail was specified */
  38         if (streq(arg_job_mode(), "fail"))
  39                 kill_whom = strjoina(kill_whom, "-fail");
  40
  41         r = expand_unit_names(bus, strv_skip(argv, 1), NULL, &names, NULL);
  42         if (r < 0)
  43                 return log_error_errno(r, "Failed to expand names: %m");
  44
  45         STRV_FOREACH(name, names) {
  46                 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
  47
  48                 if (arg_kill_value_set)
  49                         q = bus_call_method(
  50                                         bus,
  51                                         bus_systemd_mgr,
  52                                         "QueueSignalUnit",
  53                                         &error,
  54                                         NULL,
  55                                         "ssii", *name, kill_whom, arg_signal, arg_kill_value);
  56                 else
  57                         q = bus_call_method(
  58                                         bus,
  59                                         bus_systemd_mgr,
  60                                         "KillUnit",
  61                                         &error,
  62                                         NULL,
  63                                         "ssi", *name, kill_whom, arg_signal);
  64                 if (q < 0) {
  65                         RET_GATHER(r, log_error_errno(q, "Failed to kill unit %s: %s", *name, bus_error_message(&error, q)));
  66                         continue;
  67                 }
  68
  69                 if (w) {
  70                         q = bus_wait_for_units_add_unit(w, *name, BUS_WAIT_FOR_INACTIVE|BUS_WAIT_NO_JOB, NULL, NULL);
  71                         if (q < 0)
  72                                 RET_GATHER(r, log_error_errno(q, "Failed to watch unit %s: %m", *name));
  73                 }
  74         }
  75
  76         if (w) {
  77                 q = bus_wait_for_units_run(w);
  78                 if (q < 0)
  79                         return log_error_errno(q, "Failed to wait for units: %m");
  80                 if (q == BUS_WAIT_FAILURE)
  81                         RET_GATHER(r, -EIO);
  82         }
  83
  84         return r;
  85 }