diff -Nru djbdns-1.05/CHANGES djbdns-1.05+dumpcache/CHANGES
--- djbdns-1.05/CHANGES	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/CHANGES	Tue Mar 13 21:29:43 2001
@@ -374,3 +374,5 @@
 	ui: servers print starting message.
 	internal: some respond() declarations.
 	version: djbdns 1.05.
+20010313
+	patch: to dump and reload the cache
diff -Nru djbdns-1.05/Makefile djbdns-1.05+dumpcache/Makefile
--- djbdns-1.05/Makefile	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/Makefile	Tue Mar 13 21:29:43 2001
@@ -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 \
@@ -149,13 +151,13 @@
 
 cache.o: \
 compile cache.c alloc.h byte.h uint32.h exit.h tai.h uint64.h cache.h \
-uint32.h uint64.h
+uint32.h uint64.h env.h error.h open.h openreadclose.h
 	./compile cache.c
 
 cachetest: \
-load cachetest.o cache.o libtai.a buffer.a alloc.a unix.a byte.a
-	./load cachetest cache.o libtai.a buffer.a alloc.a unix.a \
-	byte.a 
+load cachetest.o cache.o libtai.a buffer.a alloc.a unix.a byte.a env.a
+	./load cachetest cache.o libtai.a buffer.a unix.a env.a \
+	alloc.a byte.a
 
 cachetest.o: \
 compile cachetest.c buffer.h exit.h cache.h uint32.h uint64.h str.h
@@ -320,10 +322,10 @@
 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 -Nru djbdns-1.05/Makefile.sig djbdns-1.05+dumpcache/Makefile.sig
--- djbdns-1.05/Makefile.sig	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/Makefile.sig	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/README djbdns-1.05+dumpcache/README
--- djbdns-1.05/README	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/README	Tue Mar 13 21:29:43 2001
@@ -1,3 +1,9 @@
+patchlevel fg1
+20010313
+by Florent Guillaume <florent.guillaume@mail.com>
+patch home page: http://mapage.noos.fr/efgeor/djbdns/index.html
+Uses parts of Felix von Leitner's djb-0.5.2 package: http://www.fefe.de/djb/
+
 djbdns 1.05
 20010211
 Copyright 2001
diff -Nru djbdns-1.05/SYSDEPS djbdns-1.05+dumpcache/SYSDEPS
--- djbdns-1.05/SYSDEPS	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/SYSDEPS	Tue Mar 13 21:29:43 2001
@@ -7,4 +7,6 @@
 direntry.h
 hasshsgr.h
 hasdevtcp.h
+hassgact.h
+hassgprm.h
 socket.lib
diff -Nru djbdns-1.05/TARGETS djbdns-1.05+dumpcache/TARGETS
--- djbdns-1.05/TARGETS	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/TARGETS	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/VERSION djbdns-1.05+dumpcache/VERSION
--- djbdns-1.05/VERSION	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/VERSION	Tue Mar 13 21:29:43 2001
@@ -1 +1 @@
-djbdns 1.05
+djbdns 1.05-fg1
diff -Nru djbdns-1.05/cache.c djbdns-1.05+dumpcache/cache.c
--- djbdns-1.05/cache.c	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/cache.c	Tue Mar 13 21:29:43 2001
@@ -1,3 +1,11 @@
+#ifdef DUMPCACHE
+#include <stdio.h>
+#include <unistd.h>
+#include "env.h"
+#include "error.h"
+#include "open.h"
+#include "openreadclose.h"
+#endif
 #include "alloc.h"
 #include "byte.h"
 #include "uint32.h"
@@ -205,3 +213,97 @@
 
   return 1;
 }
+
+#ifdef DUMPCACHE
+static int fd;
+
+static int cache_writeline(const char *buf, unsigned int len)
+{
+  int w;
+
+  while (len) {
+    w = write(fd,buf,len);
+    if (w == -1) {
+      if (errno == error_intr) continue;
+      close(fd);
+      return -1;
+    }
+    buf += w;
+    len -= w;
+  }
+  return 0;
+}
+
+int cache_dump(void)
+{
+  static char *fn;
+  static char *fntmp;
+  uint32 pos;
+  unsigned int len;
+
+  fn = env_get("DUMPCACHE");
+  if (!fn) return 999;
+  fntmp = env_get("DUMPCACHETMP");
+  if (!fntmp) return 999;
+  fd = open_trunc(fntmp);
+  if (fd == -1) return -1;
+
+  pos = oldest;
+  while (pos < unused) {
+    len = get4(pos + 4) + get4(pos + 8) + 16;
+    if (cache_writeline(x + pos + 4, len)) return -1;
+    pos += 4 + len;
+  }
+  pos = hsize;
+  while (pos < writer) {
+    len = get4(pos + 4) + get4(pos + 8) + 16;
+    if (cache_writeline(x + pos + 4, len)) return -1;
+    pos += 4 + len;
+  }
+
+  if (fsync(fd) == -1) return -1;
+  if (close(fd) == -1) return -1;
+  if (rename(fntmp,fn) == -1) return -1;
+  return 0;
+}
+
+int cache_slurp(const char *fn)
+{
+  static stralloc buf = {0};
+  char *p;
+  uint32 pos;
+  unsigned int len;
+  uint32 keylen;
+  uint32 datalen;
+  struct tai now;
+  struct tai expire;
+  int nb;
+
+  if (openreadclose(fn,&buf,16384) != 1) goto DIE;
+  tai_now(&now);
+  p = buf.s;
+  pos = 0;
+  len = buf.len;
+  nb = 0;
+  while (pos + 16 <= len) {
+    uint32_unpack(p + pos, &keylen);
+    uint32_unpack(p + pos + 4, &datalen);
+    tai_unpack(p + pos + 8, &expire);
+    pos += 16;
+    if (pos + keylen + datalen > len) break; /* missing data */
+    if (!tai_less(&expire,&now)) {
+      tai_sub(&expire,&expire,&now);
+      cache_set(p + pos, keylen, p + pos + keylen, datalen, (unsigned int)expire.x);
+    }
+    pos += keylen + datalen;
+    nb++;
+  }
+  alloc_free(buf.s); buf.s = 0;
+  return nb;
+
+ DIE:
+  alloc_free(buf.s); buf.s = 0;
+  if (errno == error_noent) return 0;
+  return -1;
+}
+#endif
diff -Nru djbdns-1.05/cache.h djbdns-1.05+dumpcache/cache.h
--- djbdns-1.05/cache.h	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/cache.h	Tue Mar 13 21:29:43 2001
@@ -8,5 +8,9 @@
 extern int cache_init(unsigned int);
 extern void cache_set(const char *,unsigned int,const char *,unsigned int,uint32);
 extern char *cache_get(const char *,unsigned int,unsigned int *,uint32 *);
+#ifdef DUMPCACHE
+extern int cache_dump(void);
+extern int cache_slurp(const char *);
+#endif
 
 #endif
diff -Nru djbdns-1.05/conf-cc djbdns-1.05+dumpcache/conf-cc
--- djbdns-1.05/conf-cc	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/conf-cc	Tue Mar 13 21:29:43 2001
@@ -1,3 +1,3 @@
-gcc -O2 -Wimplicit -Wunused -Wcomment -Wchar-subscripts -Wuninitialized -Wshadow -Wcast-qual -Wcast-align -Wwrite-strings
+gcc -O2 -Wimplicit -Wunused -Wcomment -Wchar-subscripts -Wuninitialized -Wshadow -Wcast-qual -Wcast-align -Wwrite-strings -DDUMPCACHE
 
 This will be used to compile .c files.
diff -Nru djbdns-1.05/dnscache-conf.c djbdns-1.05+dumpcache/dnscache-conf.c
--- djbdns-1.05/dnscache-conf.c	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/dnscache-conf.c	Tue Mar 13 21:29:43 2001
@@ -32,6 +32,10 @@
 char *user;
 char *loguser;
 struct passwd *pw;
+#ifdef DUMPCACHE
+int useruid;
+int usergid;
+#endif
 const char *myip;
 
 uint32 seed[32];
@@ -81,6 +85,14 @@
   myip = argv[4];
   if (!myip) myip = "127.0.0.1";
 
+#ifdef DUMPCACHE
+  pw = getpwnam(user);
+  seed_addtime();
+  if (!pw)
+    strerr_die3x(111,FATAL,"unknown account ",user);
+  useruid = pw->pw_uid;
+  usergid = pw->pw_gid;
+#endif
   pw = getpwnam(loguser);
   seed_addtime();
   if (!pw)
@@ -120,6 +132,14 @@
   seed_addtime(); perm(0644);
   seed_addtime(); start("env/DATALIMIT"); outs("3000000\n"); finish();
   seed_addtime(); perm(0644);
+#ifdef DUMPCACHE
+  seed_addtime(); start("env/SLURPCACHE"); outs("dump/slurpcache\n"); finish();
+  seed_addtime(); perm(0644);
+  seed_addtime(); start("env/DUMPCACHE"); outs("dump/dumpcache\n"); finish();
+  seed_addtime(); perm(0644);
+  seed_addtime(); start("env/DUMPCACHETMP"); outs("dump/dumpcache.tmp\n"); finish();
+  seed_addtime(); perm(0644);
+#endif
   seed_addtime(); start("run");
   outs("#!/bin/sh\nexec 2>&1\nexec <seed\nexec envdir ./env sh -c '\n  exec envuidgid "); outs(user);
   outs(" softlimit -o250 -d \"$DATALIMIT\" ");
@@ -131,6 +151,11 @@
   seed_addtime(); perm(0755);
   seed_addtime(); makedir("root");
   seed_addtime(); perm(02755);
+#ifdef DUMPCACHE
+  seed_addtime(); makedir("root/dump");
+  seed_addtime(); owner(useruid,usergid);
+  seed_addtime(); perm(02755);
+#endif
   seed_addtime(); makedir("root/ip");
   seed_addtime(); perm(02755);
   seed_addtime(); start("root/ip/127.0.0.1"); finish();
diff -Nru djbdns-1.05/dnscache.c djbdns-1.05+dumpcache/dnscache.c
--- djbdns-1.05/dnscache.c	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/dnscache.c	Tue Mar 13 21:31:14 2001
@@ -22,6 +22,9 @@
 #include "log.h"
 #include "okclient.h"
 #include "droproot.h"
+#ifdef DUMPCACHE
+#include "sig.h"
+#endif
 
 static int packetquery(char *buf,unsigned int len,char **q,char qtype[2],char qclass[2],char id[2])
 {
@@ -382,6 +385,17 @@
   }
 }
   
+#ifdef DUMPCACHE
+static void do_dump(void)
+{
+  int r;
+  r = cache_dump();
+  if (r < 0)
+    r = errno;
+  log_dump(r);
+}
+#endif
+
 #define FATAL "dnscache: fatal: "
 
 char seed[128];
@@ -430,6 +444,16 @@
   scan_ulong(x,&cachesize);
   if (!cache_init(cachesize))
     strerr_die3x(111,FATAL,"not enough memory for cache of size ",x);
+#ifdef DUMPCACHE
+  x = env_get("SLURPCACHE");
+  if (x) {
+    int nb = cache_slurp(x);
+    if (nb < 0)
+      strerr_die4sys(111,FATAL,"unable to slurp cache ",x," : ");
+    else
+      log_slurp(nb);
+  }
+#endif
 
   if (env_get("HIDETTL"))
     response_hidettl();
@@ -441,6 +465,10 @@
 
   if (socket_listen(tcp53,20) == -1)
     strerr_die2sys(111,FATAL,"unable to listen on TCP socket: ");
+
+#ifdef DUMPCACHE
+  sig_catch(sig_alarm,do_dump);
+#endif
 
   log_startup();
   doit();
diff -Nru djbdns-1.05/hassgact.h1 djbdns-1.05+dumpcache/hassgact.h1
--- djbdns-1.05/hassgact.h1	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/hassgact.h1	Tue Mar 13 21:29:43 2001
@@ -0,0 +1 @@
+/* sysdep: -sigaction */
diff -Nru djbdns-1.05/hassgact.h2 djbdns-1.05+dumpcache/hassgact.h2
--- djbdns-1.05/hassgact.h2	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/hassgact.h2	Tue Mar 13 21:29:43 2001
@@ -0,0 +1,2 @@
+/* sysdep: +sigaction */
+#define HASSIGACTION 1
diff -Nru djbdns-1.05/hassgprm.h1 djbdns-1.05+dumpcache/hassgprm.h1
--- djbdns-1.05/hassgprm.h1	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/hassgprm.h1	Tue Mar 13 21:29:43 2001
@@ -0,0 +1 @@
+/* sysdep: -sigprocmask */
diff -Nru djbdns-1.05/hassgprm.h2 djbdns-1.05+dumpcache/hassgprm.h2
--- djbdns-1.05/hassgprm.h2	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/hassgprm.h2	Tue Mar 13 21:29:43 2001
@@ -0,0 +1,2 @@
+/* sysdep: +sigprocmask */
+#define HASSIGPROCMASK 1
diff -Nru djbdns-1.05/log.c djbdns-1.05+dumpcache/log.c
--- djbdns-1.05/log.c	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/log.c	Tue Mar 13 21:29:43 2001
@@ -94,6 +94,20 @@
   line();
 }
 
+#ifdef DUMPCACHE
+void log_slurp(int nb)
+{
+  string("slurp "); number(nb);
+  line();
+}
+
+void log_dump(int err)
+{
+  string("dump err "); number(err);
+  line();
+}
+#endif
+
 void log_query(uint64 *qnum,const char client[4],unsigned int port,const char id[2],const char *q,const char qtype[2])
 {
   string("query "); number(*qnum); space();
diff -Nru djbdns-1.05/log.h djbdns-1.05+dumpcache/log.h
--- djbdns-1.05/log.h	Sun Feb 11 22:11:45 2001
+++ djbdns-1.05+dumpcache/log.h	Tue Mar 13 21:29:43 2001
@@ -4,6 +4,10 @@
 #include "uint64.h"
 
 extern void log_startup(void);
+#ifdef DUMPCACHE
+extern void log_slurp(int);
+extern void log_dump(int);
+#endif
 
 extern void log_query(uint64 *,const char *,unsigned int,const char *,const char *,const char *);
 extern void log_querydrop(uint64 *);
diff -Nru djbdns-1.05/sig.c djbdns-1.05+dumpcache/sig.c
--- djbdns-1.05/sig.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/sig.c	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/sig.h djbdns-1.05+dumpcache/sig.h
--- djbdns-1.05/sig.h	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/sig.h	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/sig_block.c djbdns-1.05+dumpcache/sig_block.c
--- djbdns-1.05/sig_block.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/sig_block.c	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/sig_catch.c djbdns-1.05+dumpcache/sig_catch.c
--- djbdns-1.05/sig_catch.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/sig_catch.c	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/sig_pause.c djbdns-1.05+dumpcache/sig_pause.c
--- djbdns-1.05/sig_pause.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/sig_pause.c	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/trysgact.c djbdns-1.05+dumpcache/trysgact.c
--- djbdns-1.05/trysgact.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/trysgact.c	Tue Mar 13 21:29:43 2001
@@ -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 -Nru djbdns-1.05/trysgprm.c djbdns-1.05+dumpcache/trysgprm.c
--- djbdns-1.05/trysgprm.c	Thu Jan  1 01:00:00 1970
+++ djbdns-1.05+dumpcache/trysgprm.c	Tue Mar 13 21:29:43 2001
@@ -0,0 +1,10 @@
+#include <signal.h>
+
+main()
+{
+  sigset_t ss;
+ 
+  sigemptyset(&ss);
+  sigaddset(&ss,SIGCHLD);
+  sigprocmask(SIG_SETMASK,&ss,(sigset_t *) 0);
+}