/***
This file is part of PulseAudio.
-
+
+ Copyright 2004-2006 Lennart Poettering
+ Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
-
+
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
-
+
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
#include <config.h>
#endif
-#include <assert.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
+#include <sys/types.h>
+#include <pulsecore/macro.h>
#ifdef HAVE_SYS_CAPABILITY_H
#include <sys/capability.h>
#endif
+#ifdef HAVE_SYS_PRCTL_H
+#include <sys/prctl.h>
+#endif
#include <pulsecore/core-error.h>
/* Drop root rights when called SUID root */
void pa_drop_root(void) {
uid_t uid = getuid();
-
+
if (uid == 0 || geteuid() != 0)
return;
- pa_log_info(__FILE__": dropping root rights.");
+ pa_log_info("Dropping root priviliges.");
#if defined(HAVE_SETRESUID)
setresuid(uid, uid, uid);
#endif
-#ifdef HAVE_SYS_CAPABILITY_H
+#if defined(HAVE_SYS_CAPABILITY_H) && defined(HAVE_SYS_PRCTL_H)
-/* Limit capabilities set to CAPSYS_NICE */
+/* Limit permitted capabilities set to CAPSYS_NICE */
int pa_limit_caps(void) {
int r = -1;
cap_t caps;
cap_value_t nice_cap = CAP_SYS_NICE;
caps = cap_init();
- assert(caps);
-
+ pa_assert(caps);
cap_clear(caps);
-
cap_set_flag(caps, CAP_EFFECTIVE, 1, &nice_cap, CAP_SET);
cap_set_flag(caps, CAP_PERMITTED, 1, &nice_cap, CAP_SET);
if (cap_set_proc(caps) < 0)
goto fail;
- pa_log_info(__FILE__": dropped capabilities successfully.");
-
- r = 0;
+ if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) < 0)
+ goto fail;
+
+ pa_log_info("Dropped capabilities successfully.");
+
+ r = 1;
fail:
- cap_free (caps);
-
+ cap_free(caps);
+
return r;
}
int r = -1;
caps = cap_init();
- assert(caps);
+ pa_assert(caps);
cap_clear(caps);
+ prctl(PR_SET_KEEPCAPS, 0, 0, 0, 0);
+
if (cap_set_proc(caps) < 0) {
- pa_log(__FILE__": failed to drop capabilities: %s", pa_cstrerror(errno));
+ pa_log("Failed to drop capabilities: %s", pa_cstrerror(errno));
goto fail;
}
-
+
r = 0;
fail:
- cap_free (caps);
-
+ cap_free(caps);
+
return r;
}