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Adapted version of
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commit 836846f0d747e1be8e37d2d43b215a68b30ea1a9
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Author: Lorenzo Colitti <lorenzo@google.com>
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Date: Thu Mar 16 12:54:20 2017 +0900
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iptables: move XT_LOCK_NAME from CFLAGS to config.h.
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This slightly simplifies configure.ac and results in more
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correct dependencies.
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Tested by running ./configure with --with-xt-lock-name and
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without, and using strace to verify that the right lock is used.
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$ make distclean-recursive && ./autogen.sh &&
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./configure --disable-nftables --prefix /tmp/iptables &&
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make -j64 &&
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make install &&
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sudo strace -e open,flock /tmp/iptables/sbin/iptables -L foo
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...
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open("/run/xtables.lock", O_RDONLY|O_CREAT, 0600) = 3
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flock(3, LOCK_EX|LOCK_NB) = 0
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$ make distclean-recursive && ./autogen.sh && \
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./configure --disable-nftables --prefix /tmp/iptables \
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--with-xt-lock-name=/tmp/iptables/run/xtables.lock &&
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make -j64 &&
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make install &&
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sudo strace -e open,flock /tmp/iptables/sbin/iptables -L foo
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...
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open("/tmp/iptables/run/xtables.lock", O_RDONLY|O_CREAT, 0600) = 3
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flock(3, LOCK_EX|LOCK_NB) = 0
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Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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diff -up iptables-1.4.21/configure.ac.move_XT_LOCK_NAME_to_config.h iptables-1.4.21/configure.ac
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--- iptables-1.4.21/configure.ac.move_XT_LOCK_NAME_to_config.h 2017-04-05 14:48:11.855229929 +0200
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+++ iptables-1.4.21/configure.ac 2017-04-05 14:48:11.856229937 +0200
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@@ -122,7 +122,7 @@ AM_CONDITIONAL([HAVE_LIBNFNETLINK], [tes
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regular_CFLAGS="-Wall -Waggregate-return -Wmissing-declarations \
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-Wmissing-prototypes -Wredundant-decls -Wshadow -Wstrict-prototypes \
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-Winline -pipe";
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-regular_CPPFLAGS="${largefile_cppflags} -DXT_LOCK_NAME=\\\"\${xt_lock_name}\\\" -D_REENTRANT \
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+regular_CPPFLAGS="${largefile_cppflags} -D_REENTRANT \
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-DXTABLES_LIBDIR=\\\"\${xtlibdir}\\\" -DXTABLES_INTERNAL";
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kinclude_CPPFLAGS="";
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if [[ -n "$kbuilddir" ]]; then
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@@ -160,7 +160,9 @@ AC_SUBST([libxtables_vcurrent])
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AC_SUBST([libxtables_vage])
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libxtables_vmajor=$(($libxtables_vcurrent - $libxtables_vage));
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AC_SUBST([libxtables_vmajor])
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-AC_SUBST([xt_lock_name])
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+
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+AC_DEFINE_UNQUOTED([XT_LOCK_NAME], "${xt_lock_name}",
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+ [Location of the iptables lock file])
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AC_CONFIG_FILES([Makefile extensions/GNUmakefile include/Makefile
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iptables/Makefile iptables/xtables.pc
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diff -up iptables-1.4.21/iptables/xshared.c.move_XT_LOCK_NAME_to_config.h iptables-1.4.21/iptables/xshared.c
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--- iptables-1.4.21/iptables/xshared.c.move_XT_LOCK_NAME_to_config.h 2017-04-05 14:48:11.855229929 +0200
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+++ iptables-1.4.21/iptables/xshared.c 2017-04-05 14:48:11.856229937 +0200
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@@ -1,3 +1,4 @@
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+#include <config.h>
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#include <getopt.h>
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#include <errno.h>
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#include <libgen.h>
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