diff -Nur djbdns-1.05/CHANGES djbdns-1.05-ma/CHANGES
--- djbdns-1.05/CHANGES	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/CHANGES	Tue Aug 13 22:08:25 2002
@@ -270,6 +270,12 @@
 		tnx Chris Saia.
 20000325
 	version: DNScache 1.00.
+20000824 Matthias Andree
+	feature: catch hangup signal and reread roots
+	patch level: ma1
+20000830 Matthias Andree
+	portability: use sig library rather than calling signal directly	
+	patch level: ma2
 20000914
 	ui: axfr-get decodes PTR. tnx to various people.
 	ui: added dnsqr.
diff -Nur djbdns-1.05/Makefile djbdns-1.05-ma/Makefile
--- djbdns-1.05/Makefile	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/Makefile	Tue Aug 13 22:08:25 2002
@@ -4,6 +4,8 @@
 
 default: it
 
+include Makefile.sig
+
 alloc.a: \
 makelib alloc.o alloc_re.o getln.o getln2.o stralloc_cat.o \
 stralloc_catb.o stralloc_cats.o stralloc_copy.o stralloc_eady.o \
@@ -209,6 +211,9 @@
 	> choose
 	chmod 755 choose
 
+clean:
+	rm -f `cat TARGETS`
+
 compile: \
 warn-auto.sh conf-cc
 	( cat warn-auto.sh; \
@@ -320,10 +325,10 @@
 dnscache: \
 load dnscache.o droproot.o okclient.o log.o cache.o query.o \
 response.o dd.o roots.o iopause.o prot.o dns.a env.a alloc.a buffer.a \
-libtai.a unix.a byte.a socket.lib
+libtai.a unix.a byte.a sig.a socket.lib
 	./load dnscache droproot.o okclient.o log.o cache.o \
 	query.o response.o dd.o roots.o iopause.o prot.o dns.a \
-	env.a alloc.a buffer.a libtai.a unix.a byte.a  `cat \
+	env.a alloc.a buffer.a libtai.a unix.a byte.a sig.a `cat \
 	socket.lib`
 
 dnscache-conf: \
diff -Nur djbdns-1.05/Makefile.sig djbdns-1.05-ma/Makefile.sig
--- djbdns-1.05/Makefile.sig	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/Makefile.sig	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,27 @@
+sig.o: \
+compile sig.c sig.h
+	./compile sig.c
+
+sig_block.o: \
+compile sig_block.c sig.h hassgprm.h
+	./compile sig_block.c
+
+sig_catch.o: \
+compile sig_catch.c sig.h hassgact.h
+	./compile sig_catch.c
+
+sig_pause.o: \
+compile sig_pause.c sig.h hassgprm.h
+	./compile sig_pause.c
+
+sig.a: \
+makelib sig.o sig_block.o sig_catch.o sig_pause.o
+	./makelib sig.a sig.o sig_block.o sig_catch.o sig_pause.o
+
+hassgact.h: \
+choose compile load trysgact.c hassgact.h1 hassgact.h2
+	./choose cl trysgact hassgact.h1 hassgact.h2 > hassgact.h
+
+hassgprm.h: \
+choose compile load trysgprm.c hassgprm.h1 hassgprm.h2
+	./choose cl trysgprm hassgprm.h1 hassgprm.h2 > hassgprm.h
diff -Nur djbdns-1.05/SYSDEPS djbdns-1.05-ma/SYSDEPS
--- djbdns-1.05/SYSDEPS	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/SYSDEPS	Tue Aug 13 22:08:25 2002
@@ -7,4 +7,6 @@
 direntry.h
 hasshsgr.h
 hasdevtcp.h
+hassgact.h
+hassgprm.h
 socket.lib
diff -Nur djbdns-1.05/TARGETS djbdns-1.05-ma/TARGETS
--- djbdns-1.05/TARGETS	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/TARGETS	Tue Aug 13 22:08:25 2002
@@ -214,3 +214,10 @@
 it
 setup
 check
+sig.o
+sig.a
+sig_catch.o
+sig_block.o
+hassgact.h
+hassgprm.h
+sig_pause.o
diff -Nur djbdns-1.05/VERSION djbdns-1.05-ma/VERSION
--- djbdns-1.05/VERSION	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/VERSION	Tue Aug 13 22:08:39 2002
@@ -1 +1 @@
-djbdns 1.05
+djbdns 1.05-ma1
diff -Nur djbdns-1.05/dnscache.c djbdns-1.05-ma/dnscache.c
--- djbdns-1.05/dnscache.c	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/dnscache.c	Tue Aug 13 22:08:25 2002
@@ -22,6 +22,7 @@
 #include "log.h"
 #include "okclient.h"
 #include "droproot.h"
+#include "sig.h"
 
 static int packetquery(char *buf,unsigned int len,char **q,char qtype[2],char qclass[2],char id[2])
 {
@@ -384,6 +385,14 @@
   
 #define FATAL "dnscache: fatal: "
 
+void hup_me()
+{
+  if (!roots_init())
+    strerr_die2sys(111,FATAL,"unable to read servers: ");
+
+  log_reread();
+}
+
 char seed[128];
 
 int main()
@@ -441,6 +450,8 @@
 
   if (socket_listen(tcp53,20) == -1)
     strerr_die2sys(111,FATAL,"unable to listen on TCP socket: ");
+
+  sig_catch(sig_hangup, hup_me);
 
   log_startup();
   doit();
diff -Nur djbdns-1.05/hassgact.h1 djbdns-1.05-ma/hassgact.h1
--- djbdns-1.05/hassgact.h1	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/hassgact.h1	Tue Aug 13 22:08:25 2002
@@ -0,0 +1 @@
+/* sysdep: -sigaction */
diff -Nur djbdns-1.05/hassgact.h2 djbdns-1.05-ma/hassgact.h2
--- djbdns-1.05/hassgact.h2	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/hassgact.h2	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,2 @@
+/* sysdep: +sigaction */
+#define HASSIGACTION 1
diff -Nur djbdns-1.05/hassgprm.h1 djbdns-1.05-ma/hassgprm.h1
--- djbdns-1.05/hassgprm.h1	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/hassgprm.h1	Tue Aug 13 22:08:25 2002
@@ -0,0 +1 @@
+/* sysdep: -sigprocmask */
diff -Nur djbdns-1.05/hassgprm.h2 djbdns-1.05-ma/hassgprm.h2
--- djbdns-1.05/hassgprm.h2	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/hassgprm.h2	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,2 @@
+/* sysdep: +sigprocmask */
+#define HASSIGPROCMASK 1
diff -Nur djbdns-1.05/log.c djbdns-1.05-ma/log.c
--- djbdns-1.05/log.c	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05-ma/log.c	Tue Aug 13 22:08:25 2002
@@ -88,6 +88,12 @@
   }
 }
 
+void log_reread(void)
+{
+  string("rereading servers configuration");
+  line();
+}
+
 void log_startup(void)
 {
   string("starting");
diff -Nur djbdns-1.05/sig.c djbdns-1.05-ma/sig.c
--- djbdns-1.05/sig.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/sig.c	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,12 @@
+#include <signal.h>
+#include "sig.h"
+
+int sig_alarm = SIGALRM;
+int sig_child = SIGCHLD;
+int sig_cont = SIGCONT;
+int sig_hangup = SIGHUP;
+int sig_pipe = SIGPIPE;
+int sig_term = SIGTERM;
+
+void (*sig_defaulthandler)() = SIG_DFL;
+void (*sig_ignorehandler)() = SIG_IGN;
diff -Nur djbdns-1.05/sig.h djbdns-1.05-ma/sig.h
--- djbdns-1.05/sig.h	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/sig.h	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,25 @@
+#ifndef SIG_H
+#define SIG_H
+
+extern int sig_alarm;
+extern int sig_child;
+extern int sig_cont;
+extern int sig_hangup;
+extern int sig_pipe;
+extern int sig_term;
+
+extern void (*sig_defaulthandler)();
+extern void (*sig_ignorehandler)();
+
+extern void sig_catch(int,void (*)());
+#define sig_ignore(s) (sig_catch((s),sig_ignorehandler))
+#define sig_uncatch(s) (sig_catch((s),sig_defaulthandler))
+
+extern void sig_block(int);
+extern void sig_unblock(int);
+extern void sig_blocknone(void);
+extern void sig_pause(void);
+
+extern void sig_dfl(int);
+
+#endif
diff -Nur djbdns-1.05/sig_block.c djbdns-1.05-ma/sig_block.c
--- djbdns-1.05/sig_block.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/sig_block.c	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,38 @@
+#include <signal.h>
+#include "sig.h"
+#include "hassgprm.h"
+
+void sig_block(int sig)
+{
+#ifdef HASSIGPROCMASK
+  sigset_t ss;
+  sigemptyset(&ss);
+  sigaddset(&ss,sig);
+  sigprocmask(SIG_BLOCK,&ss,(sigset_t *) 0);
+#else
+  sigblock(1 << (sig - 1));
+#endif
+}
+
+void sig_unblock(int sig)
+{
+#ifdef HASSIGPROCMASK
+  sigset_t ss;
+  sigemptyset(&ss);
+  sigaddset(&ss,sig);
+  sigprocmask(SIG_UNBLOCK,&ss,(sigset_t *) 0);
+#else
+  sigsetmask(sigsetmask(~0) & ~(1 << (sig - 1)));
+#endif
+}
+
+void sig_blocknone(void)
+{
+#ifdef HASSIGPROCMASK
+  sigset_t ss;
+  sigemptyset(&ss);
+  sigprocmask(SIG_SETMASK,&ss,(sigset_t *) 0);
+#else
+  sigsetmask(0);
+#endif
+}
diff -Nur djbdns-1.05/sig_catch.c djbdns-1.05-ma/sig_catch.c
--- djbdns-1.05/sig_catch.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/sig_catch.c	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,16 @@
+#include <signal.h>
+#include "sig.h"
+#include "hassgact.h"
+
+void sig_catch(int sig,void (*f)())
+{
+#ifdef HASSIGACTION
+  struct sigaction sa;
+  sa.sa_handler = f;
+  sa.sa_flags = 0;
+  sigemptyset(&sa.sa_mask);
+  sigaction(sig,&sa,(struct sigaction *) 0);
+#else
+  signal(sig,f); /* won't work under System V, even nowadays---dorks */
+#endif
+}
diff -Nur djbdns-1.05/sig_pause.c djbdns-1.05-ma/sig_pause.c
--- djbdns-1.05/sig_pause.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/sig_pause.c	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,14 @@
+#include <signal.h>
+#include "sig.h"
+#include "hassgprm.h"
+
+void sig_pause(void)
+{
+#ifdef HASSIGPROCMASK
+  sigset_t ss;
+  sigemptyset(&ss);
+  sigsuspend(&ss);
+#else
+  sigpause(0);
+#endif
+}
diff -Nur djbdns-1.05/trysgact.c djbdns-1.05-ma/trysgact.c
--- djbdns-1.05/trysgact.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/trysgact.c	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,10 @@
+#include <signal.h>
+
+main()
+{
+  struct sigaction sa;
+  sa.sa_handler = 0;
+  sa.sa_flags = 0;
+  sigemptyset(&sa.sa_mask);
+  sigaction(0,&sa,(struct sigaction *) 0);
+}
diff -Nur djbdns-1.05/trysgprm.c djbdns-1.05-ma/trysgprm.c
--- djbdns-1.05/trysgprm.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05-ma/trysgprm.c	Tue Aug 13 22:08:25 2002
@@ -0,0 +1,10 @@
+#include <signal.h>
+
+main()
+{
+  sigset_t ss;
+ 
+  sigemptyset(&ss);
+  sigaddset(&ss,SIGCHLD);
+  sigprocmask(SIG_SETMASK,&ss,(sigset_t *) 0);
+}