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-rw-r--r--src/daemon/caps.c99
1 files changed, 15 insertions, 84 deletions
diff --git a/src/daemon/caps.c b/src/daemon/caps.c
index d2ae8d0e..294be494 100644
--- a/src/daemon/caps.c
+++ b/src/daemon/caps.c
@@ -39,6 +39,7 @@
#ifdef HAVE_SYS_CAPABILITY_H
#include <sys/capability.h>
#endif
+
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
@@ -51,12 +52,13 @@ int setresgid(gid_t r, gid_t e, gid_t s);
int setresuid(uid_t r, uid_t e, uid_t s);
#endif
-#ifdef HAVE_GETUID
-
/* Drop root rights when called SUID root */
void pa_drop_root(void) {
- uid_t uid = getuid();
+#ifdef HAVE_GETUID
+ uid_t uid;
+
+ uid = getuid();
if (uid == 0 || geteuid() != 0)
return;
@@ -73,90 +75,19 @@ void pa_drop_root(void) {
pa_assert_se(getuid() == uid);
pa_assert_se(geteuid() == uid);
-}
-
-#else
-
-void pa_drop_root(void) {
-}
-
-#endif
-
-#if defined(HAVE_SYS_CAPABILITY_H) && defined(HAVE_SYS_PRCTL_H)
-
-/* Limit permitted capabilities set to CAPSYS_NICE */
-void pa_limit_caps(void) {
- cap_t caps;
- cap_value_t nice_cap = CAP_SYS_NICE;
-
- pa_assert_se(caps = cap_init());
- pa_assert_se(cap_clear(caps) == 0);
- pa_assert_se(cap_set_flag(caps, CAP_EFFECTIVE, 1, &nice_cap, CAP_SET) == 0);
- pa_assert_se(cap_set_flag(caps, CAP_PERMITTED, 1, &nice_cap, CAP_SET) == 0);
-
- if (cap_set_proc(caps) < 0)
- /* Hmm, so we couldn't limit our caps, which probably means we
- * hadn't any in the first place, so let's just make sure of
- * that */
- pa_drop_caps();
- else
- pa_log_info(_("Limited capabilities successfully to CAP_SYS_NICE."));
-
- pa_assert_se(cap_free(caps) == 0);
-
- pa_assert_se(prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) == 0);
-}
-
-/* Drop all capabilities, effectively becoming a normal user */
-void pa_drop_caps(void) {
- cap_t caps;
-
-#ifndef __OPTIMIZE__
- /* Valgrind doesn't not know set_caps, so we bypass it here -- but
- * only in development builds.*/
-
- if (pa_in_valgrind() && !pa_have_caps())
- return;
#endif
+#ifdef HAVE_SYS_PRCTL_H
pa_assert_se(prctl(PR_SET_KEEPCAPS, 0, 0, 0, 0) == 0);
-
- pa_assert_se(caps = cap_init());
- pa_assert_se(cap_clear(caps) == 0);
- pa_assert_se(cap_set_proc(caps) == 0);
- pa_assert_se(cap_free(caps) == 0);
-
- pa_assert_se(!pa_have_caps());
-}
-
-pa_bool_t pa_have_caps(void) {
- cap_t caps;
- cap_flag_value_t flag = CAP_CLEAR;
-
-#ifdef __OPTIMIZE__
- pa_assert_se(caps = cap_get_proc());
-#else
- if (!(caps = cap_get_proc()))
- return FALSE;
#endif
- pa_assert_se(cap_get_flag(caps, CAP_SYS_NICE, CAP_EFFECTIVE, &flag) >= 0);
- pa_assert_se(cap_free(caps) == 0);
-
- return flag == CAP_SET;
-}
-
-#else
-
-/* NOOPs in case capabilities are not available. */
-void pa_limit_caps(void) {
-}
-
-void pa_drop_caps(void) {
- pa_drop_root();
-}
-
-pa_bool_t pa_have_caps(void) {
- return FALSE;
-}
+#ifdef HAVE_SYS_CAPABILITY_H
+ {
+ cap_t caps;
+ pa_assert_se(caps = cap_init());
+ pa_assert_se(cap_clear(caps) == 0);
+ pa_assert_se(cap_set_proc(caps) == 0);
+ pa_assert_se(cap_free(caps) == 0);
+ }
#endif
+}