[ptxdist] [PATCH] chrony: add seccomp sandbox option

[Bruno Thomsen <bruno.thomsen@gmail.com>]

This adds a little extra security by using seccomp.

Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
---
Note: this patch requires my chrony patch series
version 3 before apply.

 rules/chrony.in   | 8 ++++++++
 rules/chrony.make | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/rules/chrony.in b/rules/chrony.in
index 2f906d2ce..f50b86442 100644
--- a/rules/chrony.in
+++ b/rules/chrony.in
@@ -6,6 +6,7 @@ menuconfig CHRONY
 	prompt "chrony                        "
 	select LIBC_M
 	select LIBCAP
+	select LIBSECCOMP	if CHRONY_SECCOMP
 	select NETTLE		if CHRONY_USE_NETTLE
 	help
 	  This will install the Chrony NTPD Daemon (chronyd)
@@ -29,6 +30,13 @@ config CHRONY_USE_NETTLE
 	  Use nettle crypto library for stronger keys than MD5 in
 	  NTP authentication.
 
+config CHRONY_SECCOMP
+	bool
+	default y
+	prompt "Enable seccomp sandboxing"
+	help
+	  Enables seccomp sandboxing to reduce the attack surface.
+
 config CHRONY_ADVANCED_COMMAND
 	bool
 	prompt "Enable advanced monitoring command"
diff --git a/rules/chrony.make b/rules/chrony.make
index 4d6f58f3b..f5e40dfb8 100644
--- a/rules/chrony.make
+++ b/rules/chrony.make
@@ -55,7 +55,8 @@ CHRONY_CONF_OPT		:= \
 	--disable-pps \
 	$(call ptx/ifdef, PTXCONF_GLOBAL_IPV6,,--disable-ipv6) \
 	--with-user=chrony \
-	--without-seccomp
+	$(call ptx/ifdef, PTXCONF_CHRONY_SECCOMP,--enable-scfilter,) \
+	$(call ptx/ifdef, PTXCONF_CHRONY_SECCOMP,,--without-seccomp)
 
 # ----------------------------------------------------------------------------
 # Install
-- 
2.26.2


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