2009-09-19 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>

Added our own daemon() function for systems which desn't have
	daemon(3).
	* configure.ac
	* src/Makefile.am
	* src/daemon.cc
	* src/daemon.h
	* src/option_processing.cc

ChangeLog

@@ -1,3 +1,13 @@
+2009-09-19  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
+
+	Added our own daemon() function for systems which desn't have
+	daemon(3).
+	* configure.ac
+	* src/Makefile.am
+	* src/daemon.cc
+	* src/daemon.h
+	* src/option_processing.cc
+
 2009-09-19  Tatsuhiro Tsujikawa  <t-tujikawa@users.sourceforge.net>
 
 	Simplified File::getCurrentDir()

configure

@@ -641,6 +641,8 @@ gt_needs=
 ac_header_list=
 ac_func_list=
 ac_subst_vars='LTLIBOBJS
+HAVE_DAEMON_FALSE
+HAVE_DAEMON_TRUE
 HAVE_TIMEGM_FALSE
 HAVE_TIMEGM_TRUE
 HAVE_STRPTIME_FALSE
@@ -21591,14 +21593,12 @@ done
 
 
 
-
 
 
 for ac_func in __argz_count \
                 __argz_next \
                 __argz_stringify \
                 atexit \
-                daemon \
                 ftruncate \
                 getcwd \
                 gethostbyaddr \
@@ -23016,6 +23016,115 @@ fi
 done
 
 
+for ac_func in daemon
+do
+as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+{ $as_echo "$as_me:$LINENO: checking for $ac_func" >&5
+$as_echo_n "checking for $ac_func... " >&6; }
+if { as_var=$as_ac_var; eval "test \"\${$as_var+set}\" = set"; }; then
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define $ac_func to an innocuous variant, in case <limits.h> declares $ac_func.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define $ac_func innocuous_$ac_func
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef $ac_func
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char $ac_func ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined __stub_$ac_func || defined __stub___$ac_func
+choke me
+#endif
+
+int
+main ()
+{
+return $ac_func ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_link") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_cxx_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 $as_test_x conftest$ac_exeext
+       }; then
+  eval "$as_ac_var=yes"
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	eval "$as_ac_var=no"
+fi
+
+rm -rf conftest.dSYM
+rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+ac_res=`eval 'as_val=${'$as_ac_var'}
+		 $as_echo "$as_val"'`
+	       { $as_echo "$as_me:$LINENO: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+as_val=`eval 'as_val=${'$as_ac_var'}
+		 $as_echo "$as_val"'`
+   if test "x$as_val" = x""yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+ have_daemon=yes
+fi
+done
+
+ if test "x$have_daemon" = "xyes"; then
+  HAVE_DAEMON_TRUE=
+  HAVE_DAEMON_FALSE='#'
+else
+  HAVE_DAEMON_TRUE='#'
+  HAVE_DAEMON_FALSE=
+fi
+
+
 case "$target" in
   *mingw*)
          if true; then
@@ -23601,6 +23710,13 @@ $as_echo "$as_me: error: conditional \"HAVE_TIMEGM\" was never defined.
 Usually this means the macro was only invoked conditionally." >&2;}
    { (exit 1); exit 1; }; }
 fi
+if test -z "${HAVE_DAEMON_TRUE}" && test -z "${HAVE_DAEMON_FALSE}"; then
+  { { $as_echo "$as_me:$LINENO: error: conditional \"HAVE_DAEMON\" was never defined.
+Usually this means the macro was only invoked conditionally." >&5
+$as_echo "$as_me: error: conditional \"HAVE_DAEMON\" was never defined.
+Usually this means the macro was only invoked conditionally." >&2;}
+   { (exit 1); exit 1; }; }
+fi
 if test -z "${HAVE_GETADDRINFO_TRUE}" && test -z "${HAVE_GETADDRINFO_FALSE}"; then
   { { $as_echo "$as_me:$LINENO: error: conditional \"HAVE_GETADDRINFO\" was never defined.
 Usually this means the macro was only invoked conditionally." >&5

configure.ac

@@ -259,7 +259,6 @@ AC_CHECK_FUNCS([__argz_count \
                 __argz_next \
                 __argz_stringify \
                 atexit \
-                daemon \
                 ftruncate \
                 getcwd \
                 gethostbyaddr \
@@ -333,6 +332,8 @@ AC_CHECK_FUNCS([strptime],
 AC_CHECK_FUNCS([timegm],
 	[AM_CONDITIONAL([HAVE_TIMEGM], true)],
 	[AM_CONDITIONAL([HAVE_TIMEGM], false)])
+AC_CHECK_FUNCS([daemon], [have_daemon=yes])
+AM_CONDITIONAL([HAVE_DAEMON], [test "x$have_daemon" = "xyes"])
 
 case "$target" in
   *mingw*)

src/Makefile.am

@@ -511,6 +511,10 @@ if !HAVE_TIMEGM
 SRCS += timegm.c timegm.h
 endif # !HAVE_TIMEGM
 
+if !HAVE_DAEMON
+SRCS += daemon.cc daemon.h
+endif # !HAVE_DAEMON
+
 noinst_LIBRARIES = libaria2c.a
 libaria2c_a_SOURCES = $(SRCS)
 aria2c_LDADD = libaria2c.a @LIBINTL@ @ALLOCA@ @LIBGNUTLS_LIBS@\

src/Makefile.in

@@ -272,6 +272,7 @@ bin_PROGRAMS = aria2c$(EXEEXT)
 @HAVE_LOCALTIME_R_FALSE@am__append_23 = localtime_r.c localtime_r.h
 @HAVE_STRPTIME_FALSE@am__append_24 = strptime.c strptime.h
 @HAVE_TIMEGM_FALSE@am__append_25 = timegm.c timegm.h
+@HAVE_DAEMON_FALSE@am__append_26 = daemon.cc daemon.h
 subdir = src
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in alloca.c
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -594,7 +595,7 @@ am__libaria2c_a_SOURCES_DIST = Socket.h SocketCore.cc SocketCore.h \
 	libgen.h getaddrinfo.c getaddrinfo.h gai_strerror.c \
 	gai_strerror.h gettimeofday.c gettimeofday.h inet_aton.c \
 	inet_aton.h localtime_r.c localtime_r.h strptime.c strptime.h \
-	timegm.c timegm.h
+	timegm.c timegm.h daemon.cc daemon.h
 @ENABLE_XML_RPC_TRUE@am__objects_1 =  \
 @ENABLE_XML_RPC_TRUE@	XmlRpcRequestParserController.$(OBJEXT) \
 @ENABLE_XML_RPC_TRUE@	XmlRpcRequestParserStateMachine.$(OBJEXT) \
@@ -771,7 +772,8 @@ am__objects_6 =
 @HAVE_LOCALTIME_R_FALSE@am__objects_23 = localtime_r.$(OBJEXT)
 @HAVE_STRPTIME_FALSE@am__objects_24 = strptime.$(OBJEXT)
 @HAVE_TIMEGM_FALSE@am__objects_25 = timegm.$(OBJEXT)
-am__objects_26 = SocketCore.$(OBJEXT) Command.$(OBJEXT) \
+@HAVE_DAEMON_FALSE@am__objects_26 = daemon.$(OBJEXT)
+am__objects_27 = SocketCore.$(OBJEXT) Command.$(OBJEXT) \
 	AbstractCommand.$(OBJEXT) \
 	InitiateConnectionCommandFactory.$(OBJEXT) \
 	DownloadCommand.$(OBJEXT) \
@@ -854,8 +856,9 @@ am__objects_26 = SocketCore.$(OBJEXT) Command.$(OBJEXT) \
 	$(am__objects_14) $(am__objects_15) $(am__objects_16) \
 	$(am__objects_17) $(am__objects_18) $(am__objects_19) \
 	$(am__objects_20) $(am__objects_21) $(am__objects_22) \
-	$(am__objects_23) $(am__objects_24) $(am__objects_25)
+	$(am__objects_23) $(am__objects_24) $(am__objects_25) \
-am_libaria2c_a_OBJECTS = $(am__objects_26)
+	$(am__objects_26)
+am_libaria2c_a_OBJECTS = $(am__objects_27)
 libaria2c_a_OBJECTS = $(am_libaria2c_a_OBJECTS)
 am__installdirs = "$(DESTDIR)$(bindir)"
 binPROGRAMS_INSTALL = $(INSTALL_PROGRAM)
@@ -1188,7 +1191,8 @@ SRCS = Socket.h SocketCore.cc SocketCore.h BinaryStream.h Command.cc \
 	$(am__append_14) $(am__append_15) $(am__append_16) \
 	$(am__append_17) $(am__append_18) $(am__append_19) \
 	$(am__append_20) $(am__append_21) $(am__append_22) \
-	$(am__append_23) $(am__append_24) $(am__append_25)
+	$(am__append_23) $(am__append_24) $(am__append_25) \
+	$(am__append_26)
 noinst_LIBRARIES = libaria2c.a
 libaria2c_a_SOURCES = $(SRCS)
 aria2c_LDADD = libaria2c.a @LIBINTL@ @ALLOCA@ @LIBGNUTLS_LIBS@\
@@ -1575,6 +1579,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/asctime_r.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bencode.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/bittorrent_helper.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/daemon.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/download_helper.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gai_strerror.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/getaddrinfo.Po@am__quote@

src/daemon.cc

@@ -0,0 +1,80 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2009 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "daemon.h"
+
+#include <unistd.h>
+#include <cstdio>
+#include <cstdlib>
+
+namespace aria2 {
+
+int daemon(int nochdir, int noclose)
+{
+  pid_t pid;
+  pid = fork();
+  if(pid == -1) {
+    return -1;
+  } else if(pid > 0) {
+    exit(EXIT_SUCCESS);
+  }
+  if(setsid() == -1) {
+    return -1;
+  }
+  pid = fork();
+  if(pid == -1) {
+    return -1;
+  } else if(pid > 0) {
+    exit(EXIT_SUCCESS);
+  }
+  if(nochdir == 0) {
+    if(chdir("/") == -1) {
+      return -1;
+    }
+  }
+  if(noclose == 0) {
+    if(freopen("/dev/null", "r", stdin) == 0) {
+      return -1;
+    }
+    if(freopen("/dev/null", "w", stdout) == 0) {
+      return -1;
+    }
+    if(freopen("/dev/null", "w", stderr) == 0) {
+      return -1;
+    }
+  }
+  return 0;
+}
+
+} // namespace aria2

src/daemon.h

@@ -0,0 +1,50 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2009 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef _D_DAEMON_H_
+#define _D_DAEMON_H_
+
+#include "common.h"
+
+namespace aria2 {
+
+// Detach the current process from terminal session and run in the
+// background. This function acts like daemon(3) standard function.
+// On success, this function returns 0. If an error occurs, it returns
+// -1.
+int daemon(int nochdir, int noclose);
+
+} // namespace aria2
+
+#endif // _D_DAEMON_H_

src/option_processing.cc

@@ -56,6 +56,9 @@
 #include "DownloadResultCode.h"
 #include "SimpleRandomizer.h"
 #include "bittorrent_helper.h"
+#ifndef HAVE_DAEMON
+#include "daemon.h"
+#endif // !HAVE_DAEMON
 
 namespace aria2 {
 
@@ -191,19 +194,12 @@ void option_processing(Option& op, std::deque<std::string>& uris,
       exit(downloadresultcode::UNKNOWN_ERROR);
     }
   }
-#ifdef HAVE_DAEMON
   if(op.getAsBool(PREF_DAEMON)) {
-    if(File::getCurrentDir() == ".") {
-      std::cerr << "Failed to get the current working directory."
-		<< " With -D option engaged,"
-		<< " the default value of --dir option is /." << std::endl;
-    }
     if(daemon(0, 0) < 0) {
       perror(MSG_DAEMON_FAILED);
       exit(downloadresultcode::UNKNOWN_ERROR);
     }
   }
-#endif // HAVE_DAEMON
 }
 
 } // namespace aria2