src/test/test-ns.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010 Lennart Poettering
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include <errno.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25 #include "log.h"
  26 #include "namespace.h"
  27
  28 int main(int argc, char *argv[]) {
  29         const char * const writable[] = {
  30                 "/home",
  31                 "-/home/lennart/projects/foobar", /* this should be masked automatically */
  32                 NULL
  33         };
  34
  35         const char * const readonly[] = {
  36                 /* "/", */
  37                 /* "/usr", */
  38                 "/boot",
  39                 "/lib",
  40                 "/usr/lib",
  41                 "-/lib64",
  42                 "-/usr/lib64",
  43                 NULL
  44         };
  45
  46         const char *inaccessible[] = {
  47                 "/home/lennart/projects",
  48                 NULL
  49         };
  50
  51         static const NamespaceInfo ns_info = {
  52                 .private_dev = true,
  53                 .protect_control_groups = true,
  54                 .protect_kernel_tunables = true,
  55                 .protect_kernel_modules = true,
  56         };
  57
  58         char *root_directory;
  59         char *projects_directory;
  60         int r;
  61         char tmp_dir[] = "/tmp/systemd-private-XXXXXX",
  62              var_tmp_dir[] = "/var/tmp/systemd-private-XXXXXX";
  63
  64         log_set_max_level(LOG_DEBUG);
  65
  66         assert_se(mkdtemp(tmp_dir));
  67         assert_se(mkdtemp(var_tmp_dir));
  68
  69         root_directory = getenv("TEST_NS_CHROOT");
  70         projects_directory = getenv("TEST_NS_PROJECTS");
  71
  72         if (projects_directory)
  73                 inaccessible[0] = projects_directory;
  74
  75         log_info("Inaccessible directory: '%s'", inaccessible[0]);
  76         if (root_directory)
  77                 log_info("Chroot: '%s'", root_directory);
  78         else
  79                 log_info("Not chrooted");
  80
  81         r = setup_namespace(root_directory,
  82                             NULL,
  83                             &ns_info,
  84                             (char **) writable,
  85                             (char **) readonly,
  86                             (char **) inaccessible,
  87                             NULL,
  88                             &(BindMount) { .source = (char*) "/usr/bin", .destination = (char*) "/etc/systemd", .read_only = true }, 1,
  89                             tmp_dir,
  90                             var_tmp_dir,
  91                             PROTECT_HOME_NO,
  92                             PROTECT_SYSTEM_NO,
  93                             0,
  94                             0);
  95         if (r < 0) {
  96                 log_error_errno(r, "Failed to setup namespace: %m");
  97
  98                 log_info("Usage:\n"
  99                          "  sudo TEST_NS_PROJECTS=/home/lennart/projects ./test-ns\n"
 100                          "  sudo TEST_NS_CHROOT=/home/alban/debian-tree TEST_NS_PROJECTS=/home/alban/debian-tree/home/alban/Documents ./test-ns");
 101
 102                 return 1;
 103         }
 104
 105         execl("/bin/sh", "/bin/sh", NULL);
 106         log_error_errno(errno, "execl(): %m");
 107
 108         return 1;
 109 }