Statistics file not available

[rfmoz]

OpenDKIM 2.11.0~beta2-8 Debian package has these compile options:

override_dh_auto_configure:
        CONFIG_SHELL=/bin/sh dh_auto_configure -- \
                CFLAGS="$(CFLAGS) $(CPPFLAGS)" \
                LDFLAGS="$(LDFLAGS) -Wl,-z,defs -L/usr/lib/libmilter" \
                --disable-live-testing \
                --enable-vbr \
                --enable-rbl \
                --enable-atps \
                --enable-stats \
                --enable-replace_rules \
                --enable-query_cache \
                --enable-sender_macro \
                --with-libmemcached \
                --with-openldap \
                --with-db \
                --with-sql-backend \
                --with-sasl \
                --with-domain=localhost \
                --with-lua \
                $(UNBOUND) \
                $(ODBX}

which generate this binary:

# opendkim -V
opendkim: OpenDKIM Filter v2.11.0
	Compiled with OpenSSL 3.0.11 19 Sep 2023
	SMFI_VERSION 0x1000001
	libmilter version 1.0.1
	Supported signing algorithms:
		rsa-sha1
		rsa-sha256
		ed25519-sha256
	Supported canonicalization algorithms:
		relaxed
		simple
	Active code options:
		QUERY_CACHE
		USE_DB
		USE_LDAP
		USE_LUA
		USE_ODBX
		USE_UNBOUND
		_FFR_ATPS
		_FFR_RBL
		_FFR_REPLACE_RULES
		_FFR_SENDER_MACRO
		_FFR_STATS
		_FFR_VBR
	libopendkim 2.11.0: atps query_cache

Stats looks available, but setting on the configuration file /etc/opendkim/opendkim.conf:

Statistics /var/lib/opendkim/stats.dat

Doesn't produce any stats file. Looking into the fd open by the opendkim worker process, doesn't report it on the list:

/proc/1167052/fd
├── 0 -> /dev/null
├── 1 -> /dev/null
├── 10 -> socket:[620656224]
├── 11 -> socket:[620656225]
├── 2 -> /dev/null
├── 3 -> socket:[620654469]
├── 4 -> socket:[620654477]
├── 5 -> pipe:[620654478]
├── 6 -> pipe:[620654478]
├── 8 -> socket:[620656222]
└── 9 -> socket:[620656223]

[futatuki]

I glanced the code, then it seems opendkim does not create statistics file, but fopen with "a" (append) in dkimf_stats_record() in opendkim/stats.c. Also it reports on failure by using syslog if loging is enabled. Isn't there any error log?

[futatuki]

... it seems opendkim does not create statistics file, but ...

I'm sorry, mode "a" in fopen(3) create the file if it does not exist.

[rfmoz]

Hi Futatuki,

Restarting via system only produces one line on the log:
2024-05-15T12:15:14.865994+02:00 servername opendkim[3413459]: OpenDKIM Filter v2.11.0 starting (args: -x /etc/opendkim/opendkim.conf)

Executing the same instruction via strace, doesn't report any reference, good or bad, to the stats file:
strace -f /usr/sbin/opendkim -x /etc/opendkim/opendkim.conf