diff options
| -rw-r--r-- | src/basic/virt.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/src/basic/virt.c b/src/basic/virt.c index d8d57381ad..9b7eb71319 100644 --- a/src/basic/virt.c +++ b/src/basic/virt.c @@ -25,15 +25,16 @@ #include "alloc-util.h" #include "dirent-util.h" +#include "env-util.h" #include "fd-util.h" #include "fileio.h" +#include "fs-util.h" #include "macro.h" #include "process-util.h" #include "stat-util.h" #include "string-table.h" #include "string-util.h" #include "virt.h" -#include "env-util.h" static int detect_vm_cpuid(void) { @@ -556,16 +557,30 @@ int running_in_userns(void) { } int running_in_chroot(void) { - int ret; + _cleanup_free_ char *self_mnt = NULL, *pid1_mnt = NULL; + int r; + + /* Try to detect whether we are running in a chroot() environment. Specifically, check whether we have a + * different root directory than PID 1, even though we live in the same mount namespace as it. */ if (getenv_bool("SYSTEMD_IGNORE_CHROOT") > 0) return 0; - ret = files_same("/proc/1/root", "/"); - if (ret < 0) - return ret; + r = files_same("/proc/1/root", "/"); + if (r < 0) + return r; + if (r > 0) + return 0; + + r = readlink_malloc("/proc/self/ns/mnt", &self_mnt); + if (r < 0) + return r; + + r = readlink_malloc("/proc/1/ns/mnt", &pid1_mnt); + if (r < 0) + return r; - return ret == 0; + return streq(self_mnt, pid1_mnt); /* Only if we live in the same namespace! */ } static const char *const virtualization_table[_VIRTUALIZATION_MAX] = { |