diff options
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/test-mount-util.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/test-mount-util.c b/src/test/test-mount-util.c index 405cdf557a..a395f0cc6d 100644 --- a/src/test/test-mount-util.c +++ b/src/test/test-mount-util.c @@ -16,6 +16,7 @@ #include "namespace-util.h" #include "path-util.h" #include "process-util.h" +#include "random-util.h" #include "rm-rf.h" #include "stat-util.h" #include "string-util.h" @@ -388,6 +389,48 @@ TEST(make_mount_point_inode) { assert_se(!(S_IXOTH & st.st_mode)); } +TEST(make_mount_switch_root) { + _cleanup_(rm_rf_physical_and_freep) char *t = NULL; + _cleanup_free_ char *s = NULL; + int r; + + if (geteuid() != 0 || have_effective_cap(CAP_SYS_ADMIN) <= 0) { + (void) log_tests_skipped("not running privileged"); + return; + } + + assert_se(mkdtemp_malloc(NULL, &t) >= 0); + + assert_se(asprintf(&s, "%s/somerandomname%" PRIu64, t, random_u64()) >= 0); + assert_se(s); + assert_se(touch(s) >= 0); + + for (int force_ms_move = 0; force_ms_move < 2; force_ms_move++) { + r = safe_fork("(switch-root", + FORK_RESET_SIGNALS | + FORK_CLOSE_ALL_FDS | + FORK_DEATHSIG | + FORK_WAIT | + FORK_REOPEN_LOG | + FORK_LOG | + FORK_NEW_MOUNTNS | + FORK_MOUNTNS_SLAVE, + NULL); + assert_se(r >= 0); + + if (r == 0) { + assert_se(make_mount_point(t) >= 0); + assert_se(mount_switch_root_full(t, /* mount_propagation_flag= */ 0, force_ms_move) >= 0); + + assert_se(access(ASSERT_PTR(strrchr(s, '/')), F_OK) >= 0); /* absolute */ + assert_se(access(ASSERT_PTR(strrchr(s, '/')) + 1, F_OK) >= 0); /* relative */ + assert_se(access(s, F_OK) < 0 && errno == ENOENT); /* doesn't exist in our new environment */ + + _exit(EXIT_SUCCESS); + } + } +} + static int intro(void) { /* Create a dummy network interface for testing remount_sysfs(). */ (void) system("ip link add dummy-test-mnt type dummy"); |