src/lxc/lxc_kill.c

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2010
   5  *
   6  * Authors:
   7  * Daniel Lezcano <daniel.lezcano at free.fr>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <sys/param.h>
  27 #include <stdlib.h>
  28 #include <signal.h>
  29 #include "commands.h"
  30 #include "arguments.h"
  31 #include "namespace.h"
  32 #include "log.h"
  33
  34 lxc_log_define(lxc_kill_ui, lxc);
  35
  36 static const struct option my_longopts[] = {
  37         LXC_COMMON_OPTIONS
  38 };
  39
  40 static struct lxc_arguments my_args = {
  41         .progname = "lxc-kill",
  42         .help     = "\
  43 --name=NAME SIGNUM\n\
  44 \n\
  45 Sends signal number SIGNUM to the first user process in container NAME\n\
  46 \n\
  47 Options :\n\
  48   -n, --name=NAME     NAME for name of the container\n",
  49         .options  = my_longopts,
  50         .parser   = NULL,
  51         .checker  = NULL,
  52 };
  53
  54 int main(int argc, char *argv[], char *envp[])
  55 {
  56         int ret;
  57         pid_t pid;
  58         int sig;
  59
  60         ret = lxc_arguments_parse(&my_args, argc, argv);
  61         if (ret)
  62                 return ret;
  63
  64         ret = lxc_log_init(my_args.name, my_args.log_file, my_args.log_priority,
  65                            my_args.progname, my_args.quiet, my_args.lxcpath[0]);
  66         if (ret)
  67                 return ret;
  68
  69         if (my_args.argc) {
  70                 sig = atoi(my_args.argv[0]);
  71                 if (!sig || sig >= NSIG) {
  72                         ERROR("'%s' isn't a valid signal number",
  73                               my_args.argv[0]);
  74                         return -1;
  75                 }
  76         } else
  77                 sig=SIGKILL;
  78
  79         pid = lxc_cmd_get_init_pid(my_args.name, my_args.lxcpath[0]);
  80         if (pid < 0) {
  81                 ERROR("failed to get the init pid");
  82                 return -1;
  83         }
  84
  85         ret = kill(pid, sig);
  86         if (ret < 0) {
  87                 ERROR("failed to kill the init pid");
  88                 return -1;
  89         }
  90
  91         return 0;
  92 }