tcpd/tcp_wrappers_7.6-shared-lib.diff

--- Makefile
+++ Makefile
@@ -145,9 +145,9 @@
 
 linux:
 	@make REAL_DAEMON_DIR=$(REAL_DAEMON_DIR) STYLE=$(STYLE) \
-	LIBS= RANLIB=ranlib ARFLAGS=rv AUX_OBJ= \
+	LIBS= RANLIB=ranlib ARFLAGS=rv AUX_OBJ=weak_symbols.o \
 	NETGROUP=-DNETGROUP TLI= \
-	EXTRA_CFLAGS="-fPIC -DSYS_ERRLIST_DEFINED -DINET6=1 -Dss_family=__ss_family" all
+	EXTRA_CFLAGS="-fPIC -DSYS_ERRLIST_DEFINED -DINET6=1 -Dss_family=__ss_family -DHAVE_WEAKSYMS -D_REENTRANT" all
 
 # This is good for many SYSV+BSD hybrids with NIS, probably also for HP-UX 7.x.
 hpux hpux8 hpux9 hpux10:
@@ -660,7 +660,18 @@
 # Protection against weird shells or weird make programs.
 
 SHELL	= /bin/sh
-.c.o:;	$(CC) $(CFLAGS) -c $*.c
+.c.o:;	$(CC) $(CFLAGS) -o $*.o -c $*.c
+
+SOMAJOR = 0
+SOMINOR = 7.6
+LIB	= libwrap.a
+SHLIB	= shared/libwrap.so.$(SOMAJOR).$(SOMINOR)
+SHLIBSOMAJ = shared/libwrap.so.$(SOMAJOR)
+SHLIBSO	= shared/libwrap.so
+SHLIBFLAGS = -Lshared -lwrap
+
+shared/%.o: %.c                                                                
+	$(CC) $(CFLAGS) $(SHCFLAGS) -c $< -o $@
 
 CFLAGS	= -O2 -pipe -DFACILITY=$(FACILITY) $(ACCESS) $(PARANOID) $(NETGROUP) \
 	$(BUGS) $(SYSTYPE) $(AUTH) $(UMASK) \
@@ -669,11 +680,16 @@
 	$(UCHAR) $(TABLES) $(STRINGS) $(TLI) $(EXTRA_CFLAGS) $(DOT) \
 	$(VSYSLOG)
 
+SHLINKFLAGS = -shared -Xlinker -soname -Xlinker libwrap.so.$(SOMAJOR) -lc $(LIBS)
+SHCFLAGS = -fPIC -shared -D_REENTRANT
+
 LIB_OBJ= hosts_access.o options.o shell_cmd.o rfc931.o eval.o \
 	hosts_ctl.o refuse.o percent_x.o clean_exit.o $(AUX_OBJ) \
 	$(FROM_OBJ) fix_options.o socket.o tli.o workarounds.o \
 	update.o misc.o diag.o percent_m.o myvsyslog.o ip6utils.o
 
+SHLIB_OBJ= $(addprefix shared/, $(LIB_OBJ));
+
 FROM_OBJ= fromhost.o
 
 KIT	= README miscd.c tcpd.c fromhost.c hosts_access.c shell_cmd.c \
@@ -688,9 +704,8 @@
 	ip6utils.c ip6utils.h \
 	scaffold.h tcpdmatch.8 README.NIS
 
-LIB	= libwrap.a
+all other: config-check tcpd tcpdmatch try-from safe_finger tcpdchk $(LIB)
 
-all other: config-check tcpd tcpdmatch try-from safe_finger tcpdchk
 
 # Invalidate all object files when the compiler options (CFLAGS) have changed.
 
@@ -701,33 +716,40 @@
 	then rm /tmp/cflags.$$$$ ; \
 	else mv /tmp/cflags.$$$$ cflags ; \
 	fi >/dev/null 2>/dev/null
+	@if [ ! -d shared ]; then mkdir shared; fi
 
 $(LIB):	$(LIB_OBJ)
 	rm -f $(LIB)
 	$(AR) $(ARFLAGS) $(LIB) $(LIB_OBJ)
 	-$(RANLIB) $(LIB)
 
-tcpd:	tcpd.o $(LIB)
-	$(CC) $(CFLAGS) -o $@ tcpd.o $(LIB) $(LIBS)
+$(SHLIB): $(SHLIB_OBJ)
+	rm -f $(SHLIB)
+	$(CC) -o $(SHLIB) $(SHLINKFLAGS) $(SHLIB_OBJ)
+	ln -s $(notdir $(SHLIB)) $(SHLIBSOMAJ)
+	ln -s $(notdir $(SHLIBSOMAJ)) $(SHLIBSO)
+
+tcpd:	tcpd.o $(SHLIB)
+	$(CC) $(CFLAGS) -o $@ tcpd.o $(SHLIBFLAGS)
 
-miscd:	miscd.o $(LIB)
-	$(CC) $(CFLAGS) -o $@ miscd.o $(LIB) $(LIBS)
+miscd:	miscd.o $(SHLIB)
+	$(CC) $(CFLAGS) -o $@ miscd.o $(SHLIBFLAGS)
 
-safe_finger: safe_finger.o $(LIB)
-	$(CC) $(CFLAGS) -o $@ safe_finger.o $(LIB) $(LIBS)
+safe_finger: safe_finger.o $(SHLIB)
+	$(CC) $(CFLAGS) -o $@ safe_finger.o $(SHLIBFLAGS)
 
 TCPDMATCH_OBJ = tcpdmatch.o fakelog.o inetcf.o scaffold.o
 
-tcpdmatch: $(TCPDMATCH_OBJ) $(LIB)
-	$(CC) $(CFLAGS) -o $@ $(TCPDMATCH_OBJ) $(LIB) $(LIBS)
+tcpdmatch: $(TCPDMATCH_OBJ) $(SHLIB)
+	$(CC) $(CFLAGS) -o $@ $(TCPDMATCH_OBJ) $(SHLIBFLAGS)
 
-try-from: try-from.o fakelog.o $(LIB)
-	$(CC) $(CFLAGS) -o $@ try-from.o fakelog.o $(LIB) $(LIBS)
+try-from: try-from.o fakelog.o $(SHLIB)
+	$(CC) $(CFLAGS) -o $@ try-from.o fakelog.o $(SHLIBFLAGS)
 
 TCPDCHK_OBJ = tcpdchk.o fakelog.o inetcf.o scaffold.o
 
-tcpdchk: $(TCPDCHK_OBJ) $(LIB)
-	$(CC) $(CFLAGS) -o $@ $(TCPDCHK_OBJ) $(LIB) $(LIBS)
+tcpdchk: $(TCPDCHK_OBJ) $(SHLIB)
+	$(CC) $(CFLAGS) -o $@ $(TCPDCHK_OBJ) $(SHLIBFLAGS)
 
 shar:	$(KIT)
 	@shar $(KIT)
@@ -743,7 +765,8 @@
 
 clean:
 	rm -f tcpd miscd safe_finger tcpdmatch tcpdchk try-from *.[oa] core \
-	cflags
+	cflags libwrap*.so*
+	rm -rf shared
 
 tidy:	clean
 	chmod -R a+r .
@@ -890,5 +913,6 @@
 update.o: mystdarg.h
 update.o: tcpd.h
 vfprintf.o: cflags
+weak_symbols.o: tcpd.h
 workarounds.o: cflags
 workarounds.o: tcpd.h
--- tcpd.h
+++ tcpd.h
@@ -106,8 +106,14 @@
 
 /* Global variables. */
 
+#ifdef HAVE_WEAKSYMS
+extern int allow_severity __attribute__ ((weak)); /* for connection logging */
+extern int deny_severity __attribute__ ((weak)); /* for connection logging */
+#else
 extern int allow_severity;		/* for connection logging */
 extern int deny_severity;		/* for connection logging */
+#endif
+
 extern char *hosts_allow_table;		/* for verification mode redirection */
 extern char *hosts_deny_table;		/* for verification mode redirection */
 extern int hosts_access_verbose;	/* for verbose matching mode */
--- weak_symbols.c
+++ weak_symbols.c
@@ -0,0 +1,11 @@
+/*
+ * @(#) weak_symbols.h 1.5 99/12/29 23:50
+ * 
+ * Author: Anthony Towns <ajt@debian.org>
+ */
+
+#ifdef HAVE_WEAKSYMS
+#include <syslog.h>
+int deny_severity = LOG_WARNING;
+int allow_severity = SEVERITY;
+#endif