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nspawn: add new --drop-capability= switch

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This commit is contained in:
Lennart Poettering 2013-11-20 22:10:42 +01:00
parent 1b5995b039
commit 420c7379fb
2 changed files with 20 additions and 2 deletions
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10
man/systemd-nspawn.xml
View File

@ -303,6 +303,16 @@
CAP_AUDIT_CONTROL.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--drop-capability=</option></term>
<listitem><para>Specify one or more
additional capabilities to drop for
the container. This allows running the
container with fewer capabilities than
the default (see above).</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--link-journal=</option></term>

12
src/nspawn/nspawn.c
View File

@ -127,6 +127,7 @@ static int help(void) {
" --read-only Mount the root directory read-only\n"
" --capability=CAP In addition to the default, retain specified\n"
" capability\n"
" --drop-capability=CAP Drop the specified capability from the default set\n"
" --link-journal=MODE Link up guest journal, one of no, auto, guest, host\n"
" -j Equivalent to --link-journal=host\n"
" --bind=PATH[:PATH] Bind mount a file or directory from the host into\n"
@ -145,6 +146,7 @@ static int parse_argv(int argc, char *argv[]) {
ARG_UUID,
ARG_READ_ONLY,
ARG_CAPABILITY,
ARG_DROP_CAPABILITY,
ARG_LINK_JOURNAL,
ARG_BIND,
ARG_BIND_RO
@ -160,6 +162,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "uuid", required_argument, NULL, ARG_UUID },
{ "read-only", no_argument, NULL, ARG_READ_ONLY },
{ "capability", required_argument, NULL, ARG_CAPABILITY },
{ "drop-capability", required_argument, NULL, ARG_DROP_CAPABILITY },
{ "link-journal", required_argument, NULL, ARG_LINK_JOURNAL },
{ "bind", required_argument, NULL, ARG_BIND },
{ "bind-ro", required_argument, NULL, ARG_BIND_RO },
@ -243,7 +246,8 @@ static int parse_argv(int argc, char *argv[]) {
arg_read_only = true;
break;
case ARG_CAPABILITY: {
case ARG_CAPABILITY:
case ARG_DROP_CAPABILITY: {
char *state, *word;
size_t length;
@ -262,7 +266,11 @@ static int parse_argv(int argc, char *argv[]) {
}
free(t);
arg_retain |= 1ULL << (uint64_t) cap;
if (c == ARG_CAPABILITY)
arg_retain |= 1ULL << (uint64_t) cap;
else
arg_retain &= ~(1ULL << (uint64_t) cap);
}
break;