src/test/test-ns.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5
   6 #include "log.h"
   7 #include "namespace.h"
   8 #include "tests.h"
   9
  10 int main(int argc, char *argv[]) {
  11         const char * const writable[] = {
  12                 "/home",
  13                 "-/home/lennart/projects/foobar", /* this should be masked automatically */
  14                 NULL
  15         };
  16
  17         const char * const readonly[] = {
  18                 /* "/", */
  19                 /* "/usr", */
  20                 "/boot",
  21                 "/lib",
  22                 "/usr/lib",
  23                 "-/lib64",
  24                 "-/usr/lib64",
  25                 NULL
  26         };
  27
  28         const char * const exec[] = {
  29                 "/lib",
  30                 "/usr",
  31                 "-/lib64",
  32                 "-/usr/lib64",
  33                 NULL
  34         };
  35
  36         const char * const no_exec[] = {
  37                 "/var",
  38                 NULL
  39         };
  40
  41         const char *inaccessible[] = {
  42                 "/home/lennart/projects",
  43                 NULL
  44         };
  45
  46         static const BindMount bind_mount = {
  47                 .source = (char*) "/usr/bin",
  48                 .destination = (char*) "/etc/systemd",
  49                 .read_only = true,
  50         };
  51
  52         static const TemporaryFileSystem tmpfs = {
  53                 .path = (char*) "/var",
  54                 .options = (char*) "ro",
  55         };
  56
  57         char *root_directory;
  58         char *projects_directory;
  59         int r;
  60         char tmp_dir[] = "/tmp/systemd-private-XXXXXX",
  61              var_tmp_dir[] = "/var/tmp/systemd-private-XXXXXX";
  62
  63         test_setup_logging(LOG_DEBUG);
  64
  65         assert_se(mkdtemp(tmp_dir));
  66         assert_se(mkdtemp(var_tmp_dir));
  67
  68         root_directory = getenv("TEST_NS_CHROOT");
  69         projects_directory = getenv("TEST_NS_PROJECTS");
  70
  71         if (projects_directory)
  72                 inaccessible[0] = projects_directory;
  73
  74         log_info("Inaccessible directory: '%s'", inaccessible[0]);
  75         if (root_directory)
  76                 log_info("Chroot: '%s'", root_directory);
  77         else
  78                 log_info("Not chrooted");
  79
  80         NamespaceParameters p = {
  81                 .runtime_scope = RUNTIME_SCOPE_SYSTEM,
  82
  83                 .root_directory = root_directory,
  84
  85                 .read_write_paths = (char**) writable,
  86                 .read_only_paths = (char**) readonly,
  87                 .inaccessible_paths = (char**) inaccessible,
  88
  89                 .exec_paths = (char**) exec,
  90                 .no_exec_paths = (char**) no_exec,
  91
  92                 .tmp_dir = tmp_dir,
  93                 .var_tmp_dir = var_tmp_dir,
  94
  95                 .bind_mounts = &bind_mount,
  96                 .n_bind_mounts = 1,
  97
  98                 .temporary_filesystems = &tmpfs,
  99                 .n_temporary_filesystems = 1,
 100
 101                 .private_dev = true,
 102                 .protect_control_groups = true,
 103                 .protect_kernel_tunables = true,
 104                 .protect_kernel_modules = true,
 105                 .protect_proc = PROTECT_PROC_NOACCESS,
 106                 .proc_subset = PROC_SUBSET_PID,
 107         };
 108
 109         r = setup_namespace(&p, NULL);
 110         if (r < 0) {
 111                 log_error_errno(r, "Failed to set up namespace: %m");
 112
 113                 log_info("Usage:\n"
 114                          "  sudo TEST_NS_PROJECTS=/home/lennart/projects ./test-ns\n"
 115                          "  sudo TEST_NS_CHROOT=/home/alban/debian-tree TEST_NS_PROJECTS=/home/alban/debian-tree/home/alban/Documents ./test-ns");
 116
 117                 return 1;
 118         }
 119
 120         execl("/bin/sh", "/bin/sh", NULL);
 121         log_error_errno(errno, "execl(): %m");
 122
 123         return 1;
 124 }