mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 00:14:32 +09:00
9e26ced980
RootDirectory= but via a open_tree() file descriptor. This allows setting up the execution environment for a service by the client in a mount namespace and then starting a transient unit in that execution environment using the new property. We also add --root-directory= and --same-root-dir= to systemd-run to have it run services within the given root directory. As systemd-run might be invoked from a different mount namespace than what systemd is running in, systemd-run opens the given path with open_tree() and then sends it to systemd using the new RootDirectoryFileDescriptor= property.
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "log.h"
|
|
#include "namespace.h"
|
|
#include "tests.h"
|
|
|
|
int main(int argc, char *argv[]) {
|
|
const char * const writable[] = {
|
|
"/home",
|
|
"-/home/lennart/projects/foobar", /* this should be masked automatically */
|
|
NULL
|
|
};
|
|
|
|
const char * const readonly[] = {
|
|
/* "/", */
|
|
/* "/usr", */
|
|
"/boot",
|
|
"/lib",
|
|
"/usr/lib",
|
|
"-/lib64",
|
|
"-/usr/lib64",
|
|
NULL
|
|
};
|
|
|
|
const char * const exec[] = {
|
|
"/lib",
|
|
"/usr",
|
|
"-/lib64",
|
|
"-/usr/lib64",
|
|
NULL
|
|
};
|
|
|
|
const char * const no_exec[] = {
|
|
"/var",
|
|
NULL
|
|
};
|
|
|
|
const char *inaccessible[] = {
|
|
"/home/lennart/projects",
|
|
NULL
|
|
};
|
|
|
|
static const BindMount bind_mount = {
|
|
.source = (char*) "/usr/bin",
|
|
.destination = (char*) "/etc/systemd",
|
|
.read_only = true,
|
|
};
|
|
|
|
static const TemporaryFileSystem tmpfs = {
|
|
.path = (char*) "/var",
|
|
.options = (char*) "ro",
|
|
};
|
|
|
|
char *root_directory;
|
|
char *projects_directory;
|
|
int r;
|
|
char tmp_dir[] = "/tmp/systemd-private-XXXXXX",
|
|
var_tmp_dir[] = "/var/tmp/systemd-private-XXXXXX";
|
|
|
|
test_setup_logging(LOG_DEBUG);
|
|
|
|
assert_se(mkdtemp(tmp_dir));
|
|
assert_se(mkdtemp(var_tmp_dir));
|
|
|
|
root_directory = getenv("TEST_NS_CHROOT");
|
|
projects_directory = getenv("TEST_NS_PROJECTS");
|
|
|
|
if (projects_directory)
|
|
inaccessible[0] = projects_directory;
|
|
|
|
log_info("Inaccessible directory: '%s'", inaccessible[0]);
|
|
if (root_directory)
|
|
log_info("Chroot: '%s'", root_directory);
|
|
else
|
|
log_info("Not chrooted");
|
|
|
|
NamespaceParameters p = {
|
|
.runtime_scope = RUNTIME_SCOPE_SYSTEM,
|
|
|
|
.root_directory = root_directory,
|
|
.root_directory_fd = -EBADF,
|
|
|
|
.read_write_paths = (char**) writable,
|
|
.read_only_paths = (char**) readonly,
|
|
.inaccessible_paths = (char**) inaccessible,
|
|
|
|
.exec_paths = (char**) exec,
|
|
.no_exec_paths = (char**) no_exec,
|
|
|
|
.tmp_dir = tmp_dir,
|
|
.var_tmp_dir = var_tmp_dir,
|
|
|
|
.bind_mounts = &bind_mount,
|
|
.n_bind_mounts = 1,
|
|
|
|
.temporary_filesystems = &tmpfs,
|
|
.n_temporary_filesystems = 1,
|
|
|
|
.private_dev = true,
|
|
.protect_control_groups = true,
|
|
.protect_kernel_tunables = true,
|
|
.protect_kernel_modules = true,
|
|
.protect_proc = PROTECT_PROC_NOACCESS,
|
|
.proc_subset = PROC_SUBSET_PID,
|
|
};
|
|
|
|
r = setup_namespace(&p, NULL);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to set up namespace: %m");
|
|
|
|
log_info("Usage:\n"
|
|
" sudo TEST_NS_PROJECTS=/home/lennart/projects ./test-ns\n"
|
|
" sudo TEST_NS_CHROOT=/home/alban/debian-tree TEST_NS_PROJECTS=/home/alban/debian-tree/home/alban/Documents ./test-ns");
|
|
|
|
return 1;
|
|
}
|
|
|
|
execl("/bin/sh", "/bin/sh", NULL);
|
|
log_error_errno(errno, "execl(): %m");
|
|
|
|
return 1;
|
|
}
|