diff options
| -rw-r--r-- | src/basic/virt.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/basic/virt.c b/src/basic/virt.c index 710f0372ea..9a0b5a28d1 100644 --- a/src/basic/virt.c +++ b/src/basic/virt.c @@ -867,10 +867,26 @@ int running_in_userns(void) { int running_in_chroot(void) { int r; + /* If we're PID1, /proc may not be mounted (and most likely we're not in a chroot). But PID1 will + * mount /proc, so all other programs can assume that if /proc is *not* available, we're in some + * chroot. */ + if (getenv_bool("SYSTEMD_IGNORE_CHROOT") > 0) return 0; + if (getpid_cached() == 1) + return false; /* We're PID 1, we can't be in a chroot. */ + r = files_same("/proc/1/root", "/", 0); + if (r == -ENOENT) { + r = proc_mounted(); + if (r == 0) { + log_debug("/proc is not mounted, assuming we're in a chroot."); + return 1; + } + if (r > 0) /* If we have fake /proc/, we can't do the check properly. */ + return -ENOSYS; + } if (r < 0) return r; |