diff options
| author | Lennart Poettering <lennart@poettering.net> | 2016-04-22 14:10:09 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2016-04-25 12:16:02 +0200 |
| commit | ccabee0d6465f06b9d339cf449fd8eea0db13373 (patch) | |
| tree | d9742d9281a08fa46d9840619ba21a4746a0b30a /src/nspawn/nspawn.c | |
| parent | d2e5535f9d945db3ca20ed264e1fe1ce99707bba (diff) | |
nspawn: make -U a tiny bit smarter
With this change -U will turn on user namespacing only if the kernel actually
supports it and otherwise gracefully degrade to non-userns mode.
Diffstat (limited to 'src/nspawn/nspawn.c')
| -rw-r--r-- | src/nspawn/nspawn.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c index 40e3d5a3fe..c8a7ec71a3 100644 --- a/src/nspawn/nspawn.c +++ b/src/nspawn/nspawn.c @@ -866,11 +866,14 @@ static int parse_argv(int argc, char *argv[]) { break; case 'U': - arg_userns_mode = USER_NAMESPACE_PICK; - arg_uid_shift = UID_INVALID; - arg_uid_range = UINT32_C(0x10000); + if (userns_supported()) { + arg_userns_mode = USER_NAMESPACE_PICK; + arg_uid_shift = UID_INVALID; + arg_uid_range = UINT32_C(0x10000); + + arg_settings_mask |= SETTING_USERNS; + } - arg_settings_mask |= SETTING_USERNS; break; case ARG_PRIVATE_USERS_CHOWN: @@ -990,7 +993,7 @@ static int parse_argv(int argc, char *argv[]) { return -EINVAL; } - if (arg_userns_mode != USER_NAMESPACE_NO && access("/proc/self/uid_map", F_OK) < 0) { + if (arg_userns_mode != USER_NAMESPACE_NO && !userns_supported()) { log_error("--private-users= is not supported, kernel compiled without user namespace support."); return -EOPNOTSUPP; } |