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authorLennart Poettering <lennart@poettering.net>2015-11-27 20:22:56 +0100
committerLennart Poettering <lennart@poettering.net>2015-11-27 20:28:13 +0100
commit6355e75610a8d47fc3ba5ab8bd442172a2cfe574 (patch)
treee71ec8fc1fdb2cef3d06a2b50f1f27b22199391e /src/basic
parent564c44436cf64adc7a9eff8c17f386899194a893 (diff)
selinux: split up mac_selinux_have() from mac_selinux_use()
Let's distuingish the cases where our code takes an active role in selinux management, or just passively reports whatever selinux properties are set. mac_selinux_have() now checks whether selinux is around for the passive stuff, and mac_selinux_use() for the active stuff. The latter checks the former, plus also checks UID == 0, under the assumption that only when we run priviliged selinux management really makes sense. Fixes: #1941
Diffstat (limited to 'src/basic')
-rw-r--r--src/basic/selinux-util.c20
-rw-r--r--src/basic/selinux-util.h1
2 files changed, 16 insertions, 5 deletions
diff --git a/src/basic/selinux-util.c b/src/basic/selinux-util.c
index e8ce5cfd96..7e4ae33efe 100644
--- a/src/basic/selinux-util.c
+++ b/src/basic/selinux-util.c
@@ -47,7 +47,7 @@ static struct selabel_handle *label_hnd = NULL;
#define log_enforcing(...) log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, __VA_ARGS__)
#endif
-bool mac_selinux_use(void) {
+bool mac_selinux_have(void) {
#ifdef HAVE_SELINUX
if (cached_use < 0)
cached_use = is_selinux_enabled() > 0;
@@ -58,6 +58,16 @@ bool mac_selinux_use(void) {
#endif
}
+bool mac_selinux_use(void) {
+ if (!mac_selinux_have())
+ return false;
+
+ /* Never try to configure SELinux features if we aren't
+ * root */
+
+ return getuid() == 0;
+}
+
void mac_selinux_retest(void) {
#ifdef HAVE_SELINUX
cached_use = -1;
@@ -197,7 +207,7 @@ int mac_selinux_get_create_label_from_exe(const char *exe, char **label) {
assert(exe);
assert(label);
- if (!mac_selinux_use())
+ if (!mac_selinux_have())
return -EOPNOTSUPP;
r = getcon_raw(&mycon);
@@ -223,7 +233,7 @@ int mac_selinux_get_our_label(char **label) {
assert(label);
#ifdef HAVE_SELINUX
- if (!mac_selinux_use())
+ if (!mac_selinux_have())
return -EOPNOTSUPP;
r = getcon_raw(label);
@@ -247,7 +257,7 @@ int mac_selinux_get_child_mls_label(int socket_fd, const char *exe, const char *
assert(exe);
assert(label);
- if (!mac_selinux_use())
+ if (!mac_selinux_have())
return -EOPNOTSUPP;
r = getcon_raw(&mycon);
@@ -302,7 +312,7 @@ char* mac_selinux_free(char *label) {
if (!label)
return NULL;
- if (!mac_selinux_use())
+ if (!mac_selinux_have())
return NULL;
diff --git a/src/basic/selinux-util.h b/src/basic/selinux-util.h
index d19984c5fe..95a2fcdbca 100644
--- a/src/basic/selinux-util.h
+++ b/src/basic/selinux-util.h
@@ -27,6 +27,7 @@
#include "macro.h"
bool mac_selinux_use(void);
+bool mac_selinux_have(void);
void mac_selinux_retest(void);
int mac_selinux_init(const char *prefix);