mention NEWS in README, add checks for fork and setpgrp

3 files changed, 495 insertions, 42 deletions

diff --git a/README b/README
index af0a879..031fb51 100644
--- a/README
+++ b/README
@@ -1,5 +1,7 @@
 LibVNCServer: a library for easy implementation of a RDP/VNC server.
-Copyright (C) 2001 Johannes E. Schindelin
+Copyright (C) 2001-2003 Johannes E. Schindelin
+
+If you already used LibVNCServer, you probably want to read NEWS.
 
 What is it?
 -----------
@@ -417,3 +419,4 @@ Contact
 -------
 
 To contact me, mail me: Johannes dot Schindelin at gmx dot de
+
diff --git a/configure b/configure
index fa66985..47a5b72 100755
--- a/configure
+++ b/configure
@@ -6886,7 +6886,455 @@ fi
 fi
 done
 
-echo "$as_me:6889: checking for gethostbyname in -lnsl" >&5
+echo "$as_me:6889: checking for pid_t" >&5
+echo $ECHO_N "checking for pid_t... $ECHO_C" >&6
+if test "${ac_cv_type_pid_t+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line 6895 "configure"
+#include "confdefs.h"
+$ac_includes_default
+int
+main ()
+{
+if ((pid_t *) 0)
+  return 0;
+if (sizeof (pid_t))
+  return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:6910: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:6913: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:6916: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:6919: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_type_pid_t=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_type_pid_t=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:6929: result: $ac_cv_type_pid_t" >&5
+echo "${ECHO_T}$ac_cv_type_pid_t" >&6
+if test $ac_cv_type_pid_t = yes; then
+  :
+else
+
+cat >>confdefs.h <<EOF
+#define pid_t int
+EOF
+
+fi
+
+for ac_header in unistd.h vfork.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+echo "$as_me:6944: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line 6950 "configure"
+#include "confdefs.h"
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:6954: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  egrep -v '^ *\+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:6960: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  eval "$as_ac_Header=yes"
+else
+  echo "$as_me: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  eval "$as_ac_Header=no"
+fi
+rm -f conftest.err conftest.$ac_ext
+fi
+echo "$as_me:6979: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<EOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+EOF
+
+fi
+done
+
+for ac_func in fork vfork
+do
+as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
+echo "$as_me:6992: checking for $ac_func" >&5
+echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
+if eval "test \"\${$as_ac_var+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line 6998 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char $ac_func ();
+char (*f) ();
+
+int
+main ()
+{
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+f = $ac_func;
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:7029: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:7032: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:7035: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:7038: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_var=yes"
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+eval "$as_ac_var=no"
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:7048: result: `eval echo '${'$as_ac_var'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
+if test `eval echo '${'$as_ac_var'}'` = yes; then
+  cat >>confdefs.h <<EOF
+#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
+EOF
+
+fi
+done
+
+ac_cv_func_fork_works=$ac_cv_func_fork
+if test "x$ac_cv_func_fork" = xyes; then
+  echo "$as_me:7060: checking for working fork" >&5
+echo $ECHO_N "checking for working fork... $ECHO_C" >&6
+if test "${ac_cv_func_fork_works+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  ac_cv_func_fork_works=cross
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* By Rüdiger Kuhlmann. */
+      #include <sys/types.h>
+      #if HAVE_UNISTD_H
+      # include <unistd.h>
+      #endif
+      /* Some systems only have a dummy stub for fork() */
+      int main ()
+      {
+        if (fork() < 0)
+          exit (1);
+        exit (0);
+      }
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:7083: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:7086: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:7088: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:7091: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_fork_works=yes
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_func_fork_works=no
+fi
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+echo "$as_me:7103: result: $ac_cv_func_fork_works" >&5
+echo "${ECHO_T}$ac_cv_func_fork_works" >&6
+
+fi
+if test "x$ac_cv_func_fork_works" = xcross; then
+  case $host in
+    *-*-amigaos* | *-*-msdosdjgpp*)
+      # Override, as these systems have only a dummy fork() stub
+      ac_cv_func_fork_works=no
+      ;;
+    *)
+      ac_cv_func_fork_works=yes
+      ;;
+  esac
+  { echo "$as_me:7117: WARNING: CROSS: Result $ac_cv_func_fork_works guessed due to cross-compiling." >&5
+echo "$as_me: WARNING: CROSS: Result $ac_cv_func_fork_works guessed due to cross-compiling." >&2;}
+fi
+ac_cv_func_vfork_works=$ac_cv_func_vfork
+if test "x$ac_cv_func_vfork" = xyes; then
+  echo "$as_me:7122: checking for working vfork" >&5
+echo $ECHO_N "checking for working vfork... $ECHO_C" >&6
+if test "${ac_cv_func_vfork_works+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  ac_cv_func_vfork_works=cross
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line 7131 "configure"
+#include "confdefs.h"
+/* Thanks to Paul Eggert for this test.  */
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#if HAVE_VFORK_H
+# include <vfork.h>
+#endif
+/* On some sparc systems, changes by the child to local and incoming
+   argument registers are propagated back to the parent.  The compiler
+   is told about this with #include <vfork.h>, but some compilers
+   (e.g. gcc -O) don't grok <vfork.h>.  Test for this by using a
+   static variable whose address is put into a register that is
+   clobbered by the vfork.  */
+static
+#ifdef __cplusplus
+sparc_address_test (int arg)
+# else
+sparc_address_test (arg) int arg;
+#endif
+{
+  static pid_t child;
+  if (!child) {
+    child = vfork ();
+    if (child < 0) {
+      perror ("vfork");
+      _exit(2);
+    }
+    if (!child) {
+      arg = getpid();
+      write(-1, "", 0);
+      _exit (arg);
+    }
+  }
+}
+
+int
+main ()
+{
+  pid_t parent = getpid ();
+  pid_t child;
+
+  sparc_address_test ();
+
+  child = vfork ();
+
+  if (child == 0) {
+    /* Here is another test for sparc vfork register problems.  This
+       test uses lots of local variables, at least as many local
+       variables as main has allocated so far including compiler
+       temporaries.  4 locals are enough for gcc 1.40.3 on a Solaris
+       4.1.3 sparc, but we use 8 to be safe.  A buggy compiler should
+       reuse the register of parent for one of the local variables,
+       since it will think that parent can't possibly be used any more
+       in this routine.  Assigning to the local variable will thus
+       munge parent in the parent process.  */
+    pid_t
+      p = getpid(), p1 = getpid(), p2 = getpid(), p3 = getpid(),
+      p4 = getpid(), p5 = getpid(), p6 = getpid(), p7 = getpid();
+    /* Convince the compiler that p..p7 are live; otherwise, it might
+       use the same hardware register for all 8 local variables.  */
+    if (p != p1 || p != p2 || p != p3 || p != p4
+	|| p != p5 || p != p6 || p != p7)
+      _exit(1);
+
+    /* On some systems (e.g. IRIX 3.3), vfork doesn't separate parent
+       from child file descriptors.  If the child closes a descriptor
+       before it execs or exits, this munges the parent's descriptor
+       as well.  Test for this by closing stdout in the child.  */
+    _exit(close(fileno(stdout)) != 0);
+  } else {
+    int status;
+    struct stat st;
+
+    while (wait(&status) != child)
+      ;
+    exit(
+	 /* Was there some problem with vforking?  */
+	 child < 0
+
+	 /* Did the child fail?  (This shouldn't happen.)  */
+	 || status
+
+	 /* Did the vfork/compiler bug occur?  */
+	 || parent != getpid()
+
+	 /* Did the file descriptor bug occur?  */
+	 || fstat(fileno(stdout), &st) != 0
+	 );
+  }
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:7228: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:7231: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:7233: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:7236: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_vfork_works=yes
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_func_vfork_works=no
+fi
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+echo "$as_me:7248: result: $ac_cv_func_vfork_works" >&5
+echo "${ECHO_T}$ac_cv_func_vfork_works" >&6
+
+fi;
+if test "x$ac_cv_func_fork_works" = xcross; then
+  ac_cv_func_vfork_works=ac_cv_func_vfork
+  { echo "$as_me:7254: WARNING: CROSS: Result $ac_cv_func_vfork_works guessed due to cross-compiling." >&5
+echo "$as_me: WARNING: CROSS: Result $ac_cv_func_vfork_works guessed due to cross-compiling." >&2;}
+fi
+
+if test "x$ac_cv_func_vfork_works" = xyes; then
+
+cat >>confdefs.h <<\EOF
+#define HAVE_WORKING_VFORK 1
+EOF
+
+else
+
+cat >>confdefs.h <<\EOF
+#define vfork fork
+EOF
+
+fi
+if test "x$ac_cv_func_fork_works" = xyes; then
+
+cat >>confdefs.h <<\EOF
+#define HAVE_WORKING_FORK 1
+EOF
+
+fi
+
+echo "$as_me:7279: checking whether setpgrp takes no argument" >&5
+echo $ECHO_N "checking whether setpgrp takes no argument... $ECHO_C" >&6
+if test "${ac_cv_func_setpgrp_void+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test "$cross_compiling" = yes; then
+  { { echo "$as_me:7285: error: cannot check setpgrp if cross compiling" >&5
+echo "$as_me: error: cannot check setpgrp if cross compiling" >&2;}
+   { (exit 1); exit 1; }; }
+else
+  cat >conftest.$ac_ext <<_ACEOF
+#line 7290 "configure"
+#include "confdefs.h"
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+int
+main ()
+{
+/* If this system has a BSD-style setpgrp, which takes arguments, exit
+   successfully.  */
+  exit (setpgrp (1,1) == -1);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (eval echo "$as_me:7307: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:7310: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (eval echo "$as_me:7312: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:7315: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_setpgrp_void=no
+else
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_func_setpgrp_void=yes
+fi
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+fi
+echo "$as_me:7327: result: $ac_cv_func_setpgrp_void" >&5
+echo "${ECHO_T}$ac_cv_func_setpgrp_void" >&6
+if test $ac_cv_func_setpgrp_void = yes; then
+
+cat >>confdefs.h <<\EOF
+#define SETPGRP_VOID 1
+EOF
+
+fi
+
+echo "$as_me:7337: checking for gethostbyname in -lnsl" >&5
 echo $ECHO_N "checking for gethostbyname in -lnsl... $ECHO_C" >&6
 if test "${ac_cv_lib_nsl_gethostbyname+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
@@ -6894,7 +7342,7 @@ else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lnsl  $LIBS"
 cat >conftest.$ac_ext <<_ACEOF
-#line 6897 "configure"
+#line 7345 "configure"
 #include "confdefs.h"
 
 /* Override any gcc2 internal prototype to avoid an error.  */
@@ -6913,16 +7361,16 @@ gethostbyname ();
 }
 _ACEOF
 rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:6916: \"$ac_link\"") >&5
+if { (eval echo "$as_me:7364: \"$ac_link\"") >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  echo "$as_me:6919: \$? = $ac_status" >&5
+  echo "$as_me:7367: \$? = $ac_status" >&5
   (exit $ac_status); } &&
          { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:6922: \"$ac_try\"") >&5
+  { (eval echo "$as_me:7370: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
-  echo "$as_me:6925: \$? = $ac_status" >&5
+  echo "$as_me:7373: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
   ac_cv_lib_nsl_gethostbyname=yes
 else
@@ -6933,7 +7381,7 @@ fi
 rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-echo "$as_me:6936: result: $ac_cv_lib_nsl_gethostbyname" >&5
+echo "$as_me:7384: result: $ac_cv_lib_nsl_gethostbyname" >&5
 echo "${ECHO_T}$ac_cv_lib_nsl_gethostbyname" >&6
 if test $ac_cv_lib_nsl_gethostbyname = yes; then
   cat >>confdefs.h <<EOF
@@ -6944,7 +7392,7 @@ EOF
 
 fi
 
-echo "$as_me:6947: checking for socket in -lsocket" >&5
+echo "$as_me:7395: checking for socket in -lsocket" >&5
 echo $ECHO_N "checking for socket in -lsocket... $ECHO_C" >&6
 if test "${ac_cv_lib_socket_socket+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
@@ -6952,7 +7400,7 @@ else
   ac_check_lib_save_LIBS=$LIBS
 LIBS="-lsocket  $LIBS"
 cat >conftest.$ac_ext <<_ACEOF
-#line 6955 "configure"
+#line 7403 "configure"
 #include "confdefs.h"
 
 /* Override any gcc2 internal prototype to avoid an error.  */
@@ -6971,16 +7419,16 @@ socket ();
 }
 _ACEOF
 rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:6974: \"$ac_link\"") >&5
+if { (eval echo "$as_me:7422: \"$ac_link\"") >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  echo "$as_me:6977: \$? = $ac_status" >&5
+  echo "$as_me:7425: \$? = $ac_status" >&5
   (exit $ac_status); } &&
          { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:6980: \"$ac_try\"") >&5
+  { (eval echo "$as_me:7428: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
-  echo "$as_me:6983: \$? = $ac_status" >&5
+  echo "$as_me:7431: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
   ac_cv_lib_socket_socket=yes
 else
@@ -6991,7 +7439,7 @@ fi
 rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
 LIBS=$ac_check_lib_save_LIBS
 fi
-echo "$as_me:6994: result: $ac_cv_lib_socket_socket" >&5
+echo "$as_me:7442: result: $ac_cv_lib_socket_socket" >&5
 echo "${ECHO_T}$ac_cv_lib_socket_socket" >&6
 if test $ac_cv_lib_socket_socket = yes; then
   cat >>confdefs.h <<EOF
@@ -7005,13 +7453,13 @@ fi
 for ac_func in ftime gethostbyname gethostname gettimeofday inet_ntoa memmove memset mkfifo select socket strchr strcspn strdup strerror strstr
 do
 as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-echo "$as_me:7008: checking for $ac_func" >&5
+echo "$as_me:7456: checking for $ac_func" >&5
 echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
 if eval "test \"\${$as_ac_var+set}\" = set"; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat >conftest.$ac_ext <<_ACEOF
-#line 7014 "configure"
+#line 7462 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func (); below.  */
@@ -7042,16 +7490,16 @@ f = $ac_func;
 }
 _ACEOF
 rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:7045: \"$ac_link\"") >&5
+if { (eval echo "$as_me:7493: \"$ac_link\"") >&5
   (eval $ac_link) 2>&5
   ac_status=$?
-  echo "$as_me:7048: \$? = $ac_status" >&5
+  echo "$as_me:7496: \$? = $ac_status" >&5
   (exit $ac_status); } &&
          { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:7051: \"$ac_try\"") >&5
+  { (eval echo "$as_me:7499: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
-  echo "$as_me:7054: \$? = $ac_status" >&5
+  echo "$as_me:7502: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
   eval "$as_ac_var=yes"
 else
@@ -7061,7 +7509,7 @@ eval "$as_ac_var=no"
 fi
 rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
 fi
-echo "$as_me:7064: result: `eval echo '${'$as_ac_var'}'`" >&5
+echo "$as_me:7512: result: `eval echo '${'$as_ac_var'}'`" >&5
 echo "${ECHO_T}`eval echo '${'$as_ac_var'}'`" >&6
 if test `eval echo '${'$as_ac_var'}'` = yes; then
   cat >>confdefs.h <<EOF
@@ -7082,23 +7530,23 @@ else
 fi
 
 # Check for OS X specific header
-echo "$as_me:7085: checking for ApplicationServices/ApplicationServices.h" >&5
+echo "$as_me:7533: checking for ApplicationServices/ApplicationServices.h" >&5
 echo $ECHO_N "checking for ApplicationServices/ApplicationServices.h... $ECHO_C" >&6
 if test "${ac_cv_header_ApplicationServices_ApplicationServices_h+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
   cat >conftest.$ac_ext <<_ACEOF
-#line 7091 "configure"
+#line 7539 "configure"
 #include "confdefs.h"
 #include <ApplicationServices/ApplicationServices.h>
 _ACEOF
-if { (eval echo "$as_me:7095: \"$ac_cpp conftest.$ac_ext\"") >&5
+if { (eval echo "$as_me:7543: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
   egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
-  echo "$as_me:7101: \$? = $ac_status" >&5
+  echo "$as_me:7549: \$? = $ac_status" >&5
   (exit $ac_status); } >/dev/null; then
   if test -s conftest.err; then
     ac_cpp_err=$ac_c_preproc_warn_flag
@@ -7117,7 +7565,7 @@ else
 fi
 rm -f conftest.err conftest.$ac_ext
 fi
-echo "$as_me:7120: result: $ac_cv_header_ApplicationServices_ApplicationServices_h" >&5
+echo "$as_me:7568: result: $ac_cv_header_ApplicationServices_ApplicationServices_h" >&5
 echo "${ECHO_T}$ac_cv_header_ApplicationServices_ApplicationServices_h" >&6
 if test $ac_cv_header_ApplicationServices_ApplicationServices_h = yes; then
   HAVE_OSX="true"
@@ -7232,7 +7680,7 @@ DEFS=-DHAVE_CONFIG_H
 : ${CONFIG_STATUS=./config.status}
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
-{ echo "$as_me:7235: creating $CONFIG_STATUS" >&5
+{ echo "$as_me:7683: creating $CONFIG_STATUS" >&5
 echo "$as_me: creating $CONFIG_STATUS" >&6;}
 cat >$CONFIG_STATUS <<_ACEOF
 #! $SHELL
@@ -7408,7 +7856,7 @@ cat >>$CONFIG_STATUS <<\EOF
     echo "$ac_cs_version"; exit 0 ;;
   --he | --h)
     # Conflict between --help and --header
-    { { echo "$as_me:7411: error: ambiguous option: $1
+    { { echo "$as_me:7859: error: ambiguous option: $1
 Try \`$0 --help' for more information." >&5
 echo "$as_me: error: ambiguous option: $1
 Try \`$0 --help' for more information." >&2;}
@@ -7427,7 +7875,7 @@ Try \`$0 --help' for more information." >&2;}
     ac_need_defaults=false;;
 
   # This is an error.
-  -*) { { echo "$as_me:7430: error: unrecognized option: $1
+  -*) { { echo "$as_me:7878: error: unrecognized option: $1
 Try \`$0 --help' for more information." >&5
 echo "$as_me: error: unrecognized option: $1
 Try \`$0 --help' for more information." >&2;}
@@ -7485,7 +7933,7 @@ do
   "rfb/rfbconfig.h" ) CONFIG_COMMANDS="$CONFIG_COMMANDS rfb/rfbconfig.h" ;;
   "default-1" ) CONFIG_COMMANDS="$CONFIG_COMMANDS default-1" ;;
   "config.h" ) CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;;
-  *) { { echo "$as_me:7488: error: invalid argument: $ac_config_target" >&5
+  *) { { echo "$as_me:7936: error: invalid argument: $ac_config_target" >&5
 echo "$as_me: error: invalid argument: $ac_config_target" >&2;}
    { (exit 1); exit 1; }; };;
   esac
@@ -7736,7 +8184,7 @@ done; }
   esac
 
   if test x"$ac_file" != x-; then
-    { echo "$as_me:7739: creating $ac_file" >&5
+    { echo "$as_me:8187: creating $ac_file" >&5
 echo "$as_me: creating $ac_file" >&6;}
     rm -f "$ac_file"
   fi
@@ -7754,7 +8202,7 @@ echo "$as_me: creating $ac_file" >&6;}
       -) echo $tmp/stdin ;;
       [\\/$]*)
          # Absolute (can't be DOS-style, as IFS=:)
-         test -f "$f" || { { echo "$as_me:7757: error: cannot find input file: $f" >&5
+         test -f "$f" || { { echo "$as_me:8205: error: cannot find input file: $f" >&5
 echo "$as_me: error: cannot find input file: $f" >&2;}
    { (exit 1); exit 1; }; }
          echo $f;;
@@ -7767,7 +8215,7 @@ echo "$as_me: error: cannot find input file: $f" >&2;}
            echo $srcdir/$f
          else
            # /dev/null tree
-           { { echo "$as_me:7770: error: cannot find input file: $f" >&5
+           { { echo "$as_me:8218: error: cannot find input file: $f" >&5
 echo "$as_me: error: cannot find input file: $f" >&2;}
    { (exit 1); exit 1; }; }
          fi;;
@@ -7828,7 +8276,7 @@ for ac_file in : $CONFIG_HEADERS; do test "x$ac_file" = x: && continue
   * )   ac_file_in=$ac_file.in ;;
   esac
 
-  test x"$ac_file" != x- && { echo "$as_me:7831: creating $ac_file" >&5
+  test x"$ac_file" != x- && { echo "$as_me:8279: creating $ac_file" >&5
 echo "$as_me: creating $ac_file" >&6;}
 
   # First look for the input files in the build tree, otherwise in the
@@ -7839,7 +8287,7 @@ echo "$as_me: creating $ac_file" >&6;}
       -) echo $tmp/stdin ;;
       [\\/$]*)
          # Absolute (can't be DOS-style, as IFS=:)
-         test -f "$f" || { { echo "$as_me:7842: error: cannot find input file: $f" >&5
+         test -f "$f" || { { echo "$as_me:8290: error: cannot find input file: $f" >&5
 echo "$as_me: error: cannot find input file: $f" >&2;}
    { (exit 1); exit 1; }; }
          echo $f;;
@@ -7852,7 +8300,7 @@ echo "$as_me: error: cannot find input file: $f" >&2;}
            echo $srcdir/$f
          else
            # /dev/null tree
-           { { echo "$as_me:7855: error: cannot find input file: $f" >&5
+           { { echo "$as_me:8303: error: cannot find input file: $f" >&5
 echo "$as_me: error: cannot find input file: $f" >&2;}
    { (exit 1); exit 1; }; }
          fi;;
@@ -7969,7 +8417,7 @@ cat >>$CONFIG_STATUS <<\EOF
   rm -f $tmp/in
   if test x"$ac_file" != x-; then
     if cmp -s $ac_file $tmp/config.h 2>/dev/null; then
-      { echo "$as_me:7972: $ac_file is unchanged" >&5
+      { echo "$as_me:8420: $ac_file is unchanged" >&5
 echo "$as_me: $ac_file is unchanged" >&6;}
     else
       ac_dir=`$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
@@ -8052,14 +8500,14 @@ if test "$ac_prefix_conf_INP" = "_"; then
    esac
 fi
 if test -z "$ac_prefix_conf_PKG" ; then
-   { { echo "$as_me:8055: error: no prefix for _PREFIX_PKG_CONFIG_H" >&5
+   { { echo "$as_me:8503: error: no prefix for _PREFIX_PKG_CONFIG_H" >&5
 echo "$as_me: error: no prefix for _PREFIX_PKG_CONFIG_H" >&2;}
    { (exit 1); exit 1; }; }
 else
   if test ! -f "$ac_prefix_conf_INP" ; then if test -f "$srcdir/$ac_prefix_conf_INP" ; then
      ac_prefix_conf_INP="$srcdir/$ac_prefix_conf_INP"
   fi fi
-  { echo "$as_me:8062: creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_prefix_conf_INP defines" >&5
+  { echo "$as_me:8510: creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_prefix_conf_INP defines" >&5
 echo "$as_me: creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_prefix_conf_INP defines" >&6;}
   if test -f $ac_prefix_conf_INP ; then
     echo "s/#undef  *\\([ABCDEFGHIJKLMNOPQRSTUVWXYZ_]\\)/#undef $ac_prefix_conf_UPP""_\\1/" > conftest.prefix
@@ -8081,7 +8529,7 @@ echo "$as_me: creating $ac_prefix_conf_OUT - prefix $ac_prefix_conf_UPP for $ac_
     echo '/* once:' $ac_prefix_conf_DEF '*/' >>$tmp/pconfig.h
     echo "#endif" >>$tmp/pconfig.h
     if cmp -s $ac_prefix_conf_OUT $tmp/pconfig.h 2>/dev/null; then
-      { echo "$as_me:8084: $ac_prefix_conf_OUT is unchanged" >&5
+      { echo "$as_me:8532: $ac_prefix_conf_OUT is unchanged" >&5
 echo "$as_me: $ac_prefix_conf_OUT is unchanged" >&6;}
     else
       ac_dir=`$as_expr X"$ac_prefix_conf_OUT" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
@@ -8116,7 +8564,7 @@ done; }
     fi
     cp conftest.prefix _configs.sed
   else
-    { { echo "$as_me:8119: error: input file $ac_prefix_conf_INP does not exist - skip generating $ac_prefix_conf_OUT" >&5
+    { { echo "$as_me:8567: error: input file $ac_prefix_conf_INP does not exist - skip generating $ac_prefix_conf_OUT" >&5
 echo "$as_me: error: input file $ac_prefix_conf_INP does not exist - skip generating $ac_prefix_conf_OUT" >&2;}
    { (exit 1); exit 1; }; }
   fi
diff --git a/configure.ac b/configure.ac
index b0338b6..78c2ccd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,6 +93,8 @@ AC_FUNC_MEMCMP
 AC_FUNC_STAT
 AC_FUNC_STRFTIME
 AC_FUNC_VPRINTF
+AC_FUNC_FORK
+AC_FUNC_SETPGRP
 AC_CHECK_LIB(nsl,gethostbyname)
 AC_CHECK_LIB(socket,socket)
 AC_CHECK_FUNCS([ftime gethostbyname gethostname gettimeofday inet_ntoa memmove memset mkfifo select socket strchr strcspn strdup strerror strstr])