[systemd-devel] [PATCH 2/2] Run with a custom SMACK domain (label).
Auke Kok
auke-jan.h.kok at intel.com
Wed Oct 2 11:12:09 PDT 2013
Allows the systemd --system process to change its current
SMACK label to a predefined custom label (usually "system")
at boot time.
This is needed to have a few system-generated folders and
sockets automatically be created with the right SMACK
label. Without that, processes either cannot communicate with
systemd or systemd fails to perform some actions.
---
configure.ac | 6 ++++++
src/core/smack-setup.c | 8 ++++++++
2 files changed, 14 insertions(+)
diff --git a/configure.ac b/configure.ac
index 4f26092..00ee9bb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -524,6 +524,12 @@ else
fi
fi
+AC_ARG_WITH(smack-run-label,
+AS_HELP_STRING([--with-smack-run-label=STRING],
+ [run systemd --system with a specific SMACK label]),
+ [AC_DEFINE_UNQUOTED(SMACK_RUN_LABEL, ["$withval"], [Run with a smack label])],
+ [])
+
if test "x${have_smack}" = xyes ; then
AC_DEFINE(HAVE_SMACK, 1, [Define if SMACK is available])
fi
diff --git a/src/core/smack-setup.c b/src/core/smack-setup.c
index 1434dea..611bfdb 100644
--- a/src/core/smack-setup.c
+++ b/src/core/smack-setup.c
@@ -36,6 +36,7 @@
#include "macro.h"
#include "smack-setup.h"
#include "util.h"
+#include "fileio.h"
#include "log.h"
#include "label.h"
@@ -138,6 +139,13 @@ int smack_setup(void) {
return 0;
}
+#ifdef SMACK_RUN_LABEL
+ r = write_string_file("/proc/self/attr/current", SMACK_RUN_LABEL);
+ if (r)
+ log_warning("Failed to set SMACK label \"%s\" on self: %s",
+ SMACK_RUN_LABEL, strerror(-r));
+#endif
+
r = write_rules("/sys/fs/smackfs/cipso2", CIPSO_CONFIG);
switch(r) {
case -ENOENT:
--
1.8.1.3
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