[PATCH] setsebool: support use of -P on SELinux-disabled hosts

[Stephen Smalley <sds@tycho.nsa.gov>]

As reported in #123, setsebool immediately exits with an error if
SELinux is disabled, preventing its use for setting boolean persistent
values.  In contrast, semanage boolean -m works on SELinux-disabled
hosts.  Change setsebool so that it can be used with the -P option
(persistent changes) even if SELinux is disabled.  In the SELinux-disabled
case, disable the policy reload and skip setting of active boolean
values, but set the persistent value in the policy store.

Fixes: https://github.com/SELinuxProject/selinux/issues/123
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
---
 policycoreutils/setsebool/setsebool.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/policycoreutils/setsebool/setsebool.c b/policycoreutils/setsebool/setsebool.c
index 53d3566c..fed296ee 100644
--- a/policycoreutils/setsebool/setsebool.c
+++ b/policycoreutils/setsebool/setsebool.c
@@ -38,10 +38,7 @@ int main(int argc, char **argv)
 	if (argc < 2)
 		usage();
 
-	if (is_selinux_enabled() <= 0) {
-		fputs("setsebool:  SELinux is disabled.\n", stderr);
-		return 1;
-	}
+	reload = (is_selinux_enabled() > 0);
 
 	while (1) {
 		clflag = getopt(argc, argv, "PNV");
@@ -130,6 +127,7 @@ static int semanage_set_boolean_list(size_t boolcnt,
 	semanage_bool_key_t *bool_key = NULL;
 	int managed;
 	int result;
+	int enabled = is_selinux_enabled();
 
 	handle = semanage_handle_create();
 	if (handle == NULL) {
@@ -191,7 +189,7 @@ static int semanage_set_boolean_list(size_t boolcnt,
 						  boolean) < 0)
 			goto err;
 
-		if (semanage_bool_set_active(handle, bool_key, boolean) < 0) {
+		if (enabled && semanage_bool_set_active(handle, bool_key, boolean) < 0) {
 			fprintf(stderr, "Failed to change boolean %s: %m\n",
 				boollist[j].name);
 			goto err;
-- 
2.20.1