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manager: validate environment parameters for SetEnvironment(), UnsetEnvironment() bus calls

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This commit is contained in:
Lennart Poettering 2013-02-11 23:41:15 +01:00
parent abb381b3b3
commit 123b964a53
3 changed files with 37 additions and 24 deletions
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40
src/core/dbus-manager.c
View File

@ -1542,7 +1542,8 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
m->exit_code = MANAGER_SWITCH_ROOT;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
char **l = NULL, **e = NULL;
_cleanup_strv_free_ char **l = NULL;
char **e = NULL;
SELINUX_ACCESS_CHECK(connection, message, "reboot");
@ -1551,9 +1552,10 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
goto oom;
if (r < 0)
return bus_send_error_reply(connection, message, NULL, r);
if (!strv_env_is_valid(l))
return bus_send_error_reply(connection, message, NULL, -EINVAL);
e = strv_env_merge(2, m->environment, l);
strv_free(l);
if (!e)
goto oom;
@ -1567,7 +1569,8 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
m->environment = e;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
char **l = NULL, **e = NULL;
_cleanup_strv_free_ char **l = NULL;
char **e = NULL;
SELINUX_ACCESS_CHECK(connection, message, "reboot");
@ -1576,10 +1579,10 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
goto oom;
if (r < 0)
return bus_send_error_reply(connection, message, NULL, r);
if (!strv_env_name_or_assignment_is_valid(l))
return bus_send_error_reply(connection, message, NULL, -EINVAL);
e = strv_env_delete(m->environment, 1, l);
strv_free(l);
if (!e)
goto oom;
@ -1593,7 +1596,8 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
m->environment = e;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetAndSetEnvironment")) {
char **l_set = NULL, **l_unset = NULL, **e = NULL, **f = NULL;
_cleanup_strv_free_ char **l_set = NULL, **l_unset = NULL, **e = NULL;
char **f = NULL;
DBusMessageIter iter;
SELINUX_ACCESS_CHECK(connection, message, "reboot");
@ -1606,33 +1610,25 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
goto oom;
if (r < 0)
return bus_send_error_reply(connection, message, NULL, r);
if (!dbus_message_iter_next(&iter)) {
strv_free(l_unset);
if (!strv_env_name_or_assignment_is_valid(l_unset))
return bus_send_error_reply(connection, message, NULL, -EINVAL);
if (!dbus_message_iter_next(&iter))
return bus_send_error_reply(connection, message, NULL, -EINVAL);
}
r = bus_parse_strv_iter(&iter, &l_set);
if (r < 0) {
strv_free(l_unset);
if (r == -ENOMEM)
goto oom;
if (r < 0)
return bus_send_error_reply(connection, message, NULL, r);
}
if (!strv_env_is_valid(l_set))
return bus_send_error_reply(connection, message, NULL, -EINVAL);
e = strv_env_delete(m->environment, 1, l_unset);
strv_free(l_unset);
if (!e) {
strv_free(l_set);
if (!e)
goto oom;
}
f = strv_env_merge(2, e, l_set);
strv_free(l_set);
strv_free(e);
if (!f)
goto oom;

15
src/shared/env-util.c
View File

@ -135,6 +135,21 @@ bool strv_env_is_valid(char **e) {
return true;
}
bool strv_env_name_or_assignment_is_valid(char **l) {
char **p, **q;
STRV_FOREACH(p, l) {
if (!env_assignment_is_valid(*p) && !env_name_is_valid(*p))
return false;
STRV_FOREACH(q, p + 1)
if (streq(*p, *q))
return false;
}
return true;
}
static int env_append(char **r, char ***k, char **a) {
assert(r);
assert(k);

2
src/shared/env-util.h
View File

@ -31,6 +31,8 @@ bool env_assignment_is_valid(const char *e);
bool strv_env_is_valid(char **e);
char **strv_env_clean(char **l);
bool strv_env_name_or_assignment_is_valid(char **l);
char **strv_env_merge(unsigned n_lists, ...);
char **strv_env_delete(char **x, unsigned n_lists, ...); /* New copy */