src/lxc/lxc_execute.c

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <dlezcano at fr.ibm.com>
   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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #include <stdio.h>
  24 #include <errno.h>
  25 #include <libgen.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <sys/param.h>
  31
  32 #include <lxc/lxc.h>
  33 #include <lxc/lxc_config.h>
  34
  35 void usage(char *cmd)
  36 {
  37         fprintf(stderr, "%s <command>\n", basename(cmd));
  38         fprintf(stderr, "\t -n <name>      : name of the container\n");
  39         fprintf(stderr, "\t [-f <confile>] : path of the configuration file\n");
  40         _exit(1);
  41 }
  42
  43 int main(int argc, char *argv[])
  44 {
  45         char opt;
  46         char *name = NULL, *file = NULL;
  47         char **args;
  48         char path[MAXPATHLEN];
  49         int nbargs = 0;
  50         int autodestroy = 0;
  51         int ret = 1;
  52         struct lxc_conf lxc_conf;
  53
  54         while ((opt = getopt(argc, argv, "f:n:")) != -1) {
  55                 switch (opt) {
  56                 case 'n':
  57                         name = optarg;
  58                         break;
  59                 case 'f':
  60                         file = optarg;
  61                         break;
  62                 }
  63
  64                 nbargs++;
  65         }
  66
  67         if (!name || !argv[optind] || !strlen(argv[optind]))
  68                 usage(argv[0]);
  69
  70         args = &argv[optind];
  71         argc -= nbargs;
  72
  73         if (lxc_config_init(&lxc_conf)) {
  74                 fprintf(stderr, "failed to initialize the configuration\n");
  75                 goto out;
  76         }
  77
  78         if (file) {
  79
  80                 if (lxc_config_read(file, &lxc_conf)) {
  81                         fprintf(stderr, "invalid configuration file\n");
  82                         goto out;
  83                 }
  84
  85         }
  86
  87         snprintf(path, MAXPATHLEN, LXCPATH "/%s", name);
  88         if (access(path, R_OK)) {
  89                 if (lxc_create(name, &lxc_conf)) {
  90                         fprintf(stderr, "failed to create the container '%s'\n", name);
  91                         goto out;
  92                 }
  93                 autodestroy = 1;
  94         }
  95
  96         if (lxc_execute(name, argc, args, NULL, NULL)) {
  97                 fprintf(stderr, "failed to execute '%s'\n", name);
  98                 goto out;
  99         }
 100
 101         ret = 0;
 102
 103 out:
 104         if (autodestroy) {
 105                 if (lxc_destroy(name)) {
 106                         fprintf(stderr, "failed to destroy '%s'\n", name);
 107                         ret = 1;
 108                 }
 109         }
 110
 111         return ret;
 112 }
 113