--- /dev/null
+--- upstream/aclocal.m4 1970-01-01 01:00:00.000000000 +0100
++++ lennart/aclocal.m4 2005-11-18 04:19:18.000000000 +0100
+@@ -0,0 +1,171 @@
++# generated automatically by aclocal 1.9.6 -*- Autoconf -*-
++
++# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
++# 2005 Free Software Foundation, Inc.
++# This file is free software; the Free Software Foundation
++# gives unlimited permission to copy and/or distribute it,
++# with or without modifications, as long as this notice is preserved.
++
++# This program is distributed in the hope that it will be useful,
++# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
++# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
++# PARTICULAR PURPOSE.
++
++# pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
++#
++# Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
++#
++# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++#
++# As a special exception to the GNU General Public License, if you
++# distribute this file as part of a program that contains a
++# configuration script generated by Autoconf, you may include it under
++# the same distribution terms that you use for the rest of that program.
++
++# PKG_PROG_PKG_CONFIG([MIN-VERSION])
++# ----------------------------------
++AC_DEFUN([PKG_PROG_PKG_CONFIG],
++[m4_pattern_forbid([^_?PKG_[A-Z_]+$])
++m4_pattern_allow([^PKG_CONFIG(_PATH)?$])
++AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility])dnl
++if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
++ AC_PATH_TOOL([PKG_CONFIG], [pkg-config])
++fi
++if test -n "$PKG_CONFIG"; then
++ _pkg_min_version=m4_default([$1], [0.9.0])
++ AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version])
++ if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
++ AC_MSG_RESULT([yes])
++ else
++ AC_MSG_RESULT([no])
++ PKG_CONFIG=""
++ fi
++
++fi[]dnl
++])# PKG_PROG_PKG_CONFIG
++
++# PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
++#
++# Check to see whether a particular set of modules exists. Similar
++# to PKG_CHECK_MODULES(), but does not set variables or print errors.
++#
++#
++# Similar to PKG_CHECK_MODULES, make sure that the first instance of
++# this or PKG_CHECK_MODULES is called, or make sure to call
++# PKG_CHECK_EXISTS manually
++# --------------------------------------------------------------
++AC_DEFUN([PKG_CHECK_EXISTS],
++[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
++if test -n "$PKG_CONFIG" && \
++ AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then
++ m4_ifval([$2], [$2], [:])
++m4_ifvaln([$3], [else
++ $3])dnl
++fi])
++
++
++# _PKG_CONFIG([VARIABLE], [COMMAND], [MODULES])
++# ---------------------------------------------
++m4_define([_PKG_CONFIG],
++[if test -n "$PKG_CONFIG"; then
++ if test -n "$$1"; then
++ pkg_cv_[]$1="$$1"
++ else
++ PKG_CHECK_EXISTS([$3],
++ [pkg_cv_[]$1=`$PKG_CONFIG --[]$2 "$3" 2>/dev/null`],
++ [pkg_failed=yes])
++ fi
++else
++ pkg_failed=untried
++fi[]dnl
++])# _PKG_CONFIG
++
++# _PKG_SHORT_ERRORS_SUPPORTED
++# -----------------------------
++AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED],
++[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
++if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
++ _pkg_short_errors_supported=yes
++else
++ _pkg_short_errors_supported=no
++fi[]dnl
++])# _PKG_SHORT_ERRORS_SUPPORTED
++
++
++# PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND],
++# [ACTION-IF-NOT-FOUND])
++#
++#
++# Note that if there is a possibility the first call to
++# PKG_CHECK_MODULES might not happen, you should be sure to include an
++# explicit call to PKG_PROG_PKG_CONFIG in your configure.ac
++#
++#
++# --------------------------------------------------------------
++AC_DEFUN([PKG_CHECK_MODULES],
++[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
++AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $1, overriding pkg-config])dnl
++AC_ARG_VAR([$1][_LIBS], [linker flags for $1, overriding pkg-config])dnl
++
++pkg_failed=no
++AC_MSG_CHECKING([for $1])
++
++_PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
++_PKG_CONFIG([$1][_LIBS], [libs], [$2])
++
++m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
++and $1[]_LIBS to avoid the need to call pkg-config.
++See the pkg-config man page for more details.])
++
++if test $pkg_failed = yes; then
++ _PKG_SHORT_ERRORS_SUPPORTED
++ if test $_pkg_short_errors_supported = yes; then
++ $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --errors-to-stdout --print-errors "$2"`
++ else
++ $1[]_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
++ fi
++ # Put the nasty error message in config.log where it belongs
++ echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD
++
++ ifelse([$4], , [AC_MSG_ERROR(dnl
++[Package requirements ($2) were not met:
++
++$$1_PKG_ERRORS
++
++Consider adjusting the PKG_CONFIG_PATH environment variable if you
++installed software in a non-standard prefix.
++
++_PKG_TEXT
++])],
++ [$4])
++elif test $pkg_failed = untried; then
++ ifelse([$4], , [AC_MSG_FAILURE(dnl
++[The pkg-config script could not be found or is too old. Make sure it
++is in your PATH or set the PKG_CONFIG environment variable to the full
++path to pkg-config.
++
++_PKG_TEXT
++
++To get pkg-config, see <http://www.freedesktop.org/software/pkgconfig>.])],
++ [$4])
++else
++ $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS
++ $1[]_LIBS=$pkg_cv_[]$1[]_LIBS
++ AC_MSG_RESULT([yes])
++ ifelse([$3], , :, [$3])
++fi[]dnl
++])# PKG_CHECK_MODULES
++
++m4_include([acinclude.m4])
+--- upstream/Makefile.in 2005-11-18 16:15:40.000000000 +0100
++++ lennart/Makefile.in 2005-11-18 01:14:43.000000000 +0100
+@@ -171,6 +171,7 @@
+ src/ssh.o src/state.o src/strip.o \
+ src/timefile.o src/traceenv.o \
+ src/where.o \
++ @ZEROCONF_DISTCC_OBJS@ \
+ $(common_obj)
+
+ distccd_obj = src/access.o \
+@@ -178,6 +179,7 @@
+ src/ncpus.o \
+ src/prefork.o \
+ src/serve.o src/setuid.o src/srvnet.o src/srvrpc.o src/state.o \
++ @ZEROCONF_DISTCCD_OBJS@ \
+ $(common_obj) @BUILD_POPT@
+
+ # Objects that need to be linked in to build monitors
+--- upstream/src/distcc.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/distcc.c 2005-11-18 01:14:43.000000000 +0100
+@@ -83,6 +83,9 @@
+ " COMPILER defaults to \"cc\"\n"
+ " --help explain usage and exit\n"
+ " --version show version and exit\n"
++" --show-hosts show host list and exit\n"
++" -j calculate the concurrency level from\n"
++" the host list.\n"
+ "\n"
+ "Environment variables:\n"
+ " See the manual page for a complete list.\n"
+@@ -135,7 +138,46 @@
+ signal(SIGHUP, &dcc_client_signalled);
+ }
+
++static void dcc_free_hostlist(struct dcc_hostdef *list) {
++ while (list) {
++ struct dcc_hostdef *l = list;
++ list = list->next;
++ dcc_free_hostdef(l);
++ }
++}
++
++static void dcc_show_hosts(void) {
++ struct dcc_hostdef *list, *l;
++ int nhosts;
++
++ if (dcc_get_hostlist(&list, &nhosts) != 0) {
++ rs_log_crit("Failed to get host list");
++ return;
++ }
++
++ for (l = list; l; l = l->next)
++ printf("%s\n", l->hostdef_string);
++
++ dcc_free_hostlist(list);
++}
++
++static void dcc_concurrency_level(void) {
++ struct dcc_hostdef *list, *l;
++ int nhosts;
++ int nslots = 0;
++
++ if (dcc_get_hostlist(&list, &nhosts) != 0) {
++ rs_log_crit("Failed to get host list");
++ return;
++ }
++
++ for (l = list; l; l = l->next)
++ nslots += l->n_slots;
+
++ dcc_free_hostlist(list);
++
++ printf("%i\n", nslots);
++}
+
+ /**
+ * distcc client entry point.
+@@ -182,6 +224,18 @@
+ ret = 0;
+ goto out;
+ }
++
++ if (!strcmp(argv[1], "--show-hosts")) {
++ dcc_show_hosts();
++ ret = 0;
++ goto out;
++ }
++
++ if (!strcmp(argv[1], "-j")) {
++ dcc_concurrency_level();
++ ret = 0;
++ goto out;
++ }
+
+ dcc_find_compiler(argv, &compiler_args);
+ /* compiler_args is now respectively either "cc -c hello.c" or
+--- upstream/src/distcc.h 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/distcc.h 2005-11-18 01:14:43.000000000 +0100
+@@ -112,7 +112,7 @@
+ int *ret_nhosts);
+ int dcc_parse_hosts(const char *where, const char *source_name,
+ struct dcc_hostdef **ret_list,
+- int *ret_nhosts);
++ int *ret_nhosts, struct dcc_hostdef **ret_prev);
+
+ /* ncpu.c */
+ int dcc_ncpus(int *);
+@@ -226,6 +226,7 @@
+ int dcc_make_tmpnam(const char *, const char *suffix, char **);
+
+ int dcc_mkdir(const char *path) WARN_UNUSED;
++int dcc_get_subdir(const char *name, char **path_ret) WARN_UNUSED;
+ int dcc_get_lock_dir(char **path_ret) WARN_UNUSED;
+ int dcc_get_state_dir(char **path_ret) WARN_UNUSED;
+ int dcc_get_top_dir(char **path_ret) WARN_UNUSED;
+--- upstream/src/dopt.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/dopt.c 2005-11-18 04:14:26.000000000 +0100
+@@ -93,6 +93,10 @@
+ opt_log_level
+ };
+
++#ifdef HAVE_AVAHI
++/* Flag for enabling/disabling Zeroconf using Avahi */
++int opt_zeroconf = 0;
++#endif
+
+ const struct poptOption options[] = {
+ { "allow", 'a', POPT_ARG_STRING, 0, 'a', 0, 0 },
+@@ -115,6 +119,9 @@
+ { "verbose", 0, POPT_ARG_NONE, 0, 'v', 0, 0 },
+ { "version", 0, POPT_ARG_NONE, 0, 'V', 0, 0 },
+ { "wizard", 'W', POPT_ARG_NONE, 0, 'W', 0, 0 },
++#ifdef HAVE_AVAHI
++ { "zeroconf", 0, POPT_ARG_NONE, &opt_zeroconf, 0, 0, 0 },
++#endif
+ { 0, 0, 0, 0, 0, 0, 0 }
+ };
+
+@@ -137,6 +144,9 @@
+ " -p, --port PORT TCP port to listen on\n"
+ " --listen ADDRESS IP address to listen on\n"
+ " -a, --allow IP[/BITS] client address access control\n"
++#ifdef HAVE_AVAHI
++" --zeroconf register via mDNS/DNS-SD\n"
++#endif
+ " Debug and trace:\n"
+ " --log-level=LEVEL set detail level for log file\n"
+ " levels: critical, error, warning, notice, info, debug\n"
+--- upstream/src/dopt.h 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/dopt.h 2005-11-18 02:27:45.000000000 +0100
+@@ -38,3 +38,7 @@
+ extern int opt_lifetime;
+ extern char *opt_listen_addr;
+ extern int opt_niceness;
++
++#ifdef HAVE_AVAHI
++extern int opt_zeroconf;
++#endif
+--- upstream/src/dparent.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/dparent.c 2005-11-18 04:13:23.000000000 +0100
+@@ -70,6 +70,7 @@
+ #include "types.h"
+ #include "daemon.h"
+ #include "netutil.h"
++#include "zeroconf.h"
+
+ static void dcc_nofork_parent(int listen_fd) NORETURN;
+ static void dcc_detach(void);
+@@ -94,6 +95,9 @@
+ int listen_fd;
+ int n_cpus;
+ int ret;
++#ifdef HAVE_AVAHI
++ void *avahi = NULL;
++#endif
+
+ if ((ret = dcc_socket_listen(arg_port, &listen_fd, opt_listen_addr)) != 0)
+ return ret;
+@@ -131,6 +135,14 @@
+ /* Don't catch signals until we've detached or created a process group. */
+ dcc_daemon_catch_signals();
+
++#ifdef HAVE_AVAHI
++ /* Zeroconf registration */
++ if (opt_zeroconf) {
++ if (!(avahi = dcc_zeroconf_register((uint16_t) arg_port, n_cpus)))
++ return EXIT_CONNECT_FAILED;
++ }
++#endif
++
+ /* This is called in the master daemon, whether that is detached or
+ * not. */
+ dcc_master_pid = getpid();
+@@ -138,10 +150,21 @@
+ if (opt_no_fork) {
+ dcc_log_daemon_started("non-forking daemon");
+ dcc_nofork_parent(listen_fd);
++ ret = 0;
+ } else {
+ dcc_log_daemon_started("preforking daemon");
+- return dcc_preforking_parent(listen_fd);
++ ret = dcc_preforking_parent(listen_fd);
+ }
++
++#ifdef HAVE_AVAHI
++ /* Remove zeroconf registration */
++ if (opt_zeroconf) {
++ if (dcc_zeroconf_unregister(avahi) != 0)
++ return EXIT_CONNECT_FAILED;
++ }
++#endif
++
++ return ret;
+ }
+
+
+--- upstream/src/help.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/help.c 2005-11-18 02:27:45.000000000 +0100
+@@ -62,6 +62,9 @@
+ "distcc comes with ABSOLUTELY NO WARRANTY. distcc is free software, and\n"
+ "you may use, modify and redistribute it under the terms of the GNU \n"
+ "General Public License version 2 or later.\n"
++#ifdef HAVE_AVAHI
++"\nBuilt with Zeroconf support.\n"
++#endif
+ "\n"
+ ,
+ prog, PACKAGE_VERSION, GNU_HOST, DISTCC_DEFAULT_PORT,
+--- upstream/src/hostfile.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/hostfile.c 2005-11-18 01:14:43.000000000 +0100
+@@ -59,7 +59,7 @@
+ if ((ret = dcc_load_file_string(fname, &body)) != 0)
+ return ret;
+
+- ret = dcc_parse_hosts(body, fname, ret_list, ret_nhosts);
++ ret = dcc_parse_hosts(body, fname, ret_list, ret_nhosts, NULL);
+
+ free(body);
+
+--- upstream/src/hosts.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/hosts.c 2005-11-18 02:27:45.000000000 +0100
+@@ -96,6 +96,10 @@
+ #include "hosts.h"
+ #include "exitcode.h"
+ #include "snprintf.h"
++#ifdef HAVE_AVAHI
++#include "zeroconf.h"
++#define ZEROCONF_MAGIC "+zeroconf"
++#endif
+
+ const int dcc_default_port = DISTCC_DEFAULT_PORT;
+
+@@ -134,9 +138,12 @@
+ char *path, *top;
+ int ret;
+
++ *ret_list = NULL;
++ *ret_nhosts = 0;
++
+ if ((env = getenv("DISTCC_HOSTS")) != NULL) {
+ rs_trace("read hosts from environment");
+- return dcc_parse_hosts(env, "$DISTCC_HOSTS", ret_list, ret_nhosts);
++ return dcc_parse_hosts(env, "$DISTCC_HOSTS", ret_list, ret_nhosts, NULL);
+ }
+
+ /* $DISTCC_DIR or ~/.distcc */
+@@ -163,7 +170,7 @@
+ rs_trace("not reading %s: %s", path, strerror(errno));
+ free(path);
+ }
+-
++
+ /* FIXME: Clearer message? */
+ rs_log_warning("no hostlist is set; can't distribute work");
+
+@@ -346,17 +353,19 @@
+ **/
+ int dcc_parse_hosts(const char *where, const char *source_name,
+ struct dcc_hostdef **ret_list,
+- int *ret_nhosts)
++ int *ret_nhosts, struct dcc_hostdef **ret_prev)
+ {
+ int ret;
+- struct dcc_hostdef *prev, *curr;
++ struct dcc_hostdef *curr, *_prev;
++
++ if (!ret_prev) {
++ ret_prev = &_prev;
++ _prev = NULL;
++ }
+
+ /* TODO: Check for '/' in places where it might cause trouble with
+ * a lock file name. */
+
+- prev = NULL;
+- *ret_list = NULL;
+- *ret_nhosts = 0;
+ /* A simple, hardcoded scanner. Some of the GNU routines might be
+ * useful here, but they won't work on less capable systems.
+ *
+@@ -390,6 +399,15 @@
+ token_start = where;
+ token_len = strcspn(where, " #\t\n\f\r");
+
++#ifdef HAVE_AVAHI
++ if (token_len == sizeof(ZEROCONF_MAGIC)-1 &&
++ !strncmp(token_start, ZEROCONF_MAGIC, (unsigned) token_len)) {
++ if ((ret = dcc_zeroconf_add_hosts(ret_list, ret_nhosts, 4, ret_prev) != 0))
++ return ret;
++ goto skip;
++ }
++#endif
++
+ /* Allocate new list item */
+ curr = calloc(1, sizeof(struct dcc_hostdef));
+ if (!curr) {
+@@ -404,8 +422,8 @@
+ }
+
+ /* Link into list */
+- if (prev) {
+- prev->next = curr;
++ if (*ret_prev) {
++ (*ret_prev)->next = curr;
+ } else {
+ *ret_list = curr; /* first */
+ }
+@@ -434,10 +452,15 @@
+ return ret;
+ }
+
++ (*ret_nhosts)++;
++ *ret_prev = curr;
++
++#ifdef HAVE_AVAHI
++ skip:
++#endif
++
+ /* continue to next token if any */
+ where = token_start + token_len;
+- prev = curr;
+- (*ret_nhosts)++;
+ }
+
+ if (*ret_nhosts) {
+--- upstream/src/io.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/io.c 2005-11-18 01:14:43.000000000 +0100
+@@ -163,7 +163,7 @@
+ return ret;
+ else
+ continue;
+- } else if (r == -1 && errno == EAGAIN) {
++ } else if (r == -1 && errno == EINTR) {
+ continue;
+ } else if (r == -1) {
+ rs_log_error("failed to read: %s", strerror(errno));
+@@ -205,9 +205,6 @@
+ } else if (r == -1) {
+ rs_log_error("failed to write: %s", strerror(errno));
+ return EXIT_IO_ERROR;
+- } else if (r == 0) {
+- rs_log_error("unexpected eof on fd%d", fd);
+- return EXIT_TRUNCATED;
+ } else {
+ buf = &((char *) buf)[r];
+ len -= r;
+--- upstream/src/tempfile.c 2005-11-18 16:15:40.000000000 +0100
++++ lennart/src/tempfile.c 2005-11-18 01:14:43.000000000 +0100
+@@ -161,7 +161,7 @@
+ * Return a subdirectory of the DISTCC_DIR of the given name, making
+ * sure that the directory exists.
+ **/
+-static int dcc_get_subdir(const char *name,
++int dcc_get_subdir(const char *name,
+ char **dir_ret)
+ {
+ int ret;
+--- upstream/configure.ac 2005-11-18 16:15:40.000000000 +0100
++++ lennart/configure.ac 2005-11-18 04:18:07.000000000 +0100
+@@ -388,6 +388,23 @@
+ AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1, [define if you have struct sockaddr_storage]),,
+ [#include <sys/socket.h>])
+
++dnl check for avahi
++PKG_CHECK_MODULES(AVAHI, [avahi-client >= 0.6],
++[AC_DEFINE(HAVE_AVAHI, 1, [defined if Avahi is available])
++CFLAGS="$CFLAGS $AVAHI_CFLAGS"
++LIBS="$LIBS $AVAHI_LIBS"
++ZEROCONF_DISTCC_OBJS="src/zeroconf.o"
++ZEROCONF_DISTCCD_OBJS="src/zeroconf-reg.o"],
++[ZEROCONF_DISTCC_OBJS=""
++ZEROCONF_DISTCCD_OBJS=""])
++AC_SUBST(ZEROCONF_DISTCC_OBJS)
++AC_SUBST(ZEROCONF_DISTCCD_OBJS)
++
++ACX_PTHREAD
++LIBS="$PTHREAD_LIBS $LIBS"
++CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
++CC="$PTHREAD_CC"
++
+ dnl ##### Output
+ AC_SUBST(docdir)
+ AC_SUBST(CFLAGS)
+--- upstream/acinclude.m4 1970-01-01 01:00:00.000000000 +0100
++++ lennart/acinclude.m4 2005-11-18 04:17:08.000000000 +0100
+@@ -0,0 +1,235 @@
++dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
++dnl
++dnl This macro figures out how to build C programs using POSIX threads.
++dnl It sets the PTHREAD_LIBS output variable to the threads library and
++dnl linker flags, and the PTHREAD_CFLAGS output variable to any special
++dnl C compiler flags that are needed. (The user can also force certain
++dnl compiler flags/libs to be tested by setting these environment
++dnl variables.)
++dnl
++dnl Also sets PTHREAD_CC to any special C compiler that is needed for
++dnl multi-threaded programs (defaults to the value of CC otherwise).
++dnl (This is necessary on AIX to use the special cc_r compiler alias.)
++dnl
++dnl NOTE: You are assumed to not only compile your program with these
++dnl flags, but also link it with them as well. e.g. you should link
++dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
++dnl $LIBS
++dnl
++dnl If you are only building threads programs, you may wish to use
++dnl these variables in your default LIBS, CFLAGS, and CC:
++dnl
++dnl LIBS="$PTHREAD_LIBS $LIBS"
++dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
++dnl CC="$PTHREAD_CC"
++dnl
++dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
++dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
++dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
++dnl
++dnl ACTION-IF-FOUND is a list of shell commands to run if a threads
++dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
++dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
++dnl default action will define HAVE_PTHREAD.
++dnl
++dnl Please let the authors know if this macro fails on any platform, or
++dnl if you have any other suggestions or comments. This macro was based
++dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with
++dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros
++dnl posted by Alejandro Forero Cuervo to the autoconf macro repository.
++dnl We are also grateful for the helpful feedback of numerous users.
++dnl
++dnl @category InstalledPackages
++dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
++dnl @version 2005-01-14
++dnl @license GPLWithACException
++
++AC_DEFUN([ACX_PTHREAD], [
++AC_REQUIRE([AC_CANONICAL_HOST])
++AC_LANG_SAVE
++AC_LANG_C
++acx_pthread_ok=no
++
++# We used to check for pthread.h first, but this fails if pthread.h
++# requires special compiler flags (e.g. on True64 or Sequent).
++# It gets checked for in the link test anyway.
++
++# First of all, check if the user has set any of the PTHREAD_LIBS,
++# etcetera environment variables, and if threads linking works using
++# them:
++if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
++ save_CFLAGS="$CFLAGS"
++ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
++ save_LIBS="$LIBS"
++ LIBS="$PTHREAD_LIBS $LIBS"
++ AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
++ AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
++ AC_MSG_RESULT($acx_pthread_ok)
++ if test x"$acx_pthread_ok" = xno; then
++ PTHREAD_LIBS=""
++ PTHREAD_CFLAGS=""
++ fi
++ LIBS="$save_LIBS"
++ CFLAGS="$save_CFLAGS"
++fi
++
++# We must check for the threads library under a number of different
++# names; the ordering is very important because some systems
++# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
++# libraries is broken (non-POSIX).
++
++# Create a list of thread flags to try. Items starting with a "-" are
++# C compiler flags, and other items are library names, except for "none"
++# which indicates that we try without any flags at all, and "pthread-config"
++# which is a program returning the flags for the Pth emulation library.
++
++acx_pthread_flags="pthreads pthread none -Kthread -kthread lthread -pthread -pthreads -mthreads --thread-safe -mt pthread-config"
++
++# The ordering *is* (sometimes) important. Some notes on the
++# individual items follow:
++
++# pthreads: AIX (must check this before -lpthread)
++# none: in case threads are in libc; should be tried before -Kthread and
++# other compiler flags to prevent continual compiler warnings
++# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
++# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
++# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
++# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
++# -pthreads: Solaris/gcc
++# -mthreads: Mingw32/gcc, Lynx/gcc
++# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
++# doesn't hurt to check since this sometimes defines pthreads too;
++# also defines -D_REENTRANT)
++# pthread: Linux, etcetera
++# --thread-safe: KAI C++
++# pthread-config: use pthread-config program (for GNU Pth library)
++
++case "${host_cpu}-${host_os}" in
++ *solaris*)
++
++ # On Solaris (at least, for some versions), libc contains stubbed
++ # (non-functional) versions of the pthreads routines, so link-based
++ # tests will erroneously succeed. (We need to link with -pthread or
++ # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
++ # a function called by this macro, so we could check for that, but
++ # who knows whether they'll stub that too in a future libc.) So,
++ # we'll just look for -pthreads and -lpthread first:
++
++ acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags"
++ ;;
++esac
++
++if test x"$acx_pthread_ok" = xno; then
++for flag in $acx_pthread_flags; do
++
++ case $flag in
++ none)
++ AC_MSG_CHECKING([whether pthreads work without any flags])
++ ;;
++
++ -*)
++ AC_MSG_CHECKING([whether pthreads work with $flag])
++ PTHREAD_CFLAGS="$flag"
++ ;;
++
++ pthread-config)
++ AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
++ if test x"$acx_pthread_config" = xno; then continue; fi
++ PTHREAD_CFLAGS="`pthread-config --cflags`"
++ PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
++ ;;
++
++ *)
++ AC_MSG_CHECKING([for the pthreads library -l$flag])
++ PTHREAD_LIBS="-l$flag"
++ ;;
++ esac
++
++ save_LIBS="$LIBS"
++ save_CFLAGS="$CFLAGS"
++ LIBS="$PTHREAD_LIBS $LIBS"
++ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
++
++ # Check for various functions. We must include pthread.h,
++ # since some functions may be macros. (On the Sequent, we
++ # need a special flag -Kthread to make this header compile.)
++ # We check for pthread_join because it is in -lpthread on IRIX
++ # while pthread_create is in libc. We check for pthread_attr_init
++ # due to DEC craziness with -lpthreads. We check for
++ # pthread_cleanup_push because it is one of the few pthread
++ # functions on Solaris that doesn't have a non-functional libc stub.
++ # We try pthread_create on general principles.
++ AC_TRY_LINK([#include <pthread.h>],
++ [pthread_t th; pthread_join(th, 0);
++ pthread_attr_init(0); pthread_cleanup_push(0, 0);
++ pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
++ [acx_pthread_ok=yes])
++
++ LIBS="$save_LIBS"
++ CFLAGS="$save_CFLAGS"
++
++ AC_MSG_RESULT($acx_pthread_ok)
++ if test "x$acx_pthread_ok" = xyes; then
++ break;
++ fi
++
++ PTHREAD_LIBS=""
++ PTHREAD_CFLAGS=""
++done
++fi
++
++# Various other checks:
++if test "x$acx_pthread_ok" = xyes; then
++ save_LIBS="$LIBS"
++ LIBS="$PTHREAD_LIBS $LIBS"
++ save_CFLAGS="$CFLAGS"
++ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
++
++ # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
++ AC_MSG_CHECKING([for joinable pthread attribute])
++ attr_name=unknown
++ for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
++ AC_TRY_LINK([#include <pthread.h>], [int attr=$attr;],
++ [attr_name=$attr; break])
++ done
++ AC_MSG_RESULT($attr_name)
++ if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
++ AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
++ [Define to necessary symbol if this constant
++ uses a non-standard name on your system.])
++ fi
++
++ AC_MSG_CHECKING([if more special flags are required for pthreads])
++ flag=no
++ case "${host_cpu}-${host_os}" in
++ *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
++ *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
++ esac
++ AC_MSG_RESULT(${flag})
++ if test "x$flag" != xno; then
++ PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
++ fi
++
++ LIBS="$save_LIBS"
++ CFLAGS="$save_CFLAGS"
++
++ # More AIX lossage: must compile with cc_r
++ AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC})
++else
++ PTHREAD_CC="$CC"
++fi
++
++AC_SUBST(PTHREAD_LIBS)
++AC_SUBST(PTHREAD_CFLAGS)
++AC_SUBST(PTHREAD_CC)
++
++# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
++if test x"$acx_pthread_ok" = xyes; then
++ ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
++ :
++else
++ acx_pthread_ok=no
++ $2
++fi
++AC_LANG_RESTORE
++])dnl ACX_PTHREAD
+--- upstream/src/zeroconf.h 1970-01-01 01:00:00.000000000 +0100
++++ lennart/src/zeroconf.h 2005-11-18 04:06:29.000000000 +0100
+@@ -0,0 +1,13 @@
++#ifndef foozeroconfhfoo
++#define foozeroconfhfoo
++
++#include <inttypes.h>
++
++int dcc_zeroconf_add_hosts(struct dcc_hostdef **re_list, int *ret_nhosts, int slots, struct dcc_hostdef **ret_prev);
++
++void * dcc_zeroconf_register(uint16_t port, int n_cpus);
++int dcc_zeroconf_unregister(void*);
++
++#define DCC_DNS_SERVICE_TYPE "_distcc._tcp"
++
++#endif
+--- upstream/src/zeroconf.c 1970-01-01 01:00:00.000000000 +0100
++++ lennart/src/zeroconf.c 2005-11-18 15:51:45.000000000 +0100
+@@ -0,0 +1,602 @@
++/* -*- c-file-style: "java"; indent-tabs-mode: nil -*- */
++
++#include "config.h"
++
++#include <assert.h>
++#include <stdio.h>
++#include <sys/select.h>
++#include <signal.h>
++#include <sys/file.h>
++#include <sys/time.h>
++#include <time.h>
++#include <sys/stat.h>
++#include <string.h>
++#include <errno.h>
++#include <unistd.h>
++#include <stdlib.h>
++#include <limits.h>
++
++#include <avahi-common/domain.h>
++#include <avahi-common/error.h>
++#include <avahi-common/malloc.h>
++#include <avahi-common/address.h>
++#include <avahi-common/simple-watch.h>
++#include <avahi-client/lookup.h>
++
++#include "distcc.h"
++#include "hosts.h"
++#include "zeroconf.h"
++#include "trace.h"
++#include "exitcode.h"
++
++/* How long shall the background daemon be idle before i terminates itself? */
++#define MAX_IDLE_TIME 20
++
++/* Maxium size of host file to load */
++#define MAX_FILE_SIZE (1024*100)
++
++/* General daemon data */
++struct daemon_data {
++ struct host *hosts;
++ int fd;
++ int n_slots;
++
++ AvahiClient *client;
++ AvahiServiceBrowser *browser;
++ AvahiSimplePoll *simple_poll;
++};
++
++/* Zeroconf service wrapper */
++struct host {
++ struct daemon_data *daemon_data;
++ struct host *next;
++
++ AvahiIfIndex interface;
++ AvahiProtocol protocol;
++ char *service;
++ char *domain;
++
++ AvahiAddress address;
++ uint16_t port;
++ int n_cpus;
++
++ AvahiServiceResolver *resolver;
++};
++
++/* A generic, system independant lock routine, similar to sys_lock,
++ * but more powerful:
++ * rw: if non-zero: r/w lock instead of r/o lock
++ * enable: lock or unlock
++ * block: block when locking */
++static int generic_lock(int fd, int rw, int enable, int block) {
++#if defined(F_SETLK)
++ struct flock lockparam;
++
++ lockparam.l_type = enable ? (rw ? F_WRLCK : F_RDLCK) : F_UNLCK;
++ lockparam.l_whence = SEEK_SET;
++ lockparam.l_start = 0;
++ lockparam.l_len = 0; /* whole file */
++
++ return fcntl(fd, block ? F_SETLKW : F_SETLK, &lockparam);
++#elif defined(HAVE_FLOCK)
++ return flock(fd, (enable ? (rw ? LOCK_EX : LOCK_SH) : LOCK_UN) | (block ? LOCK_NB : 0));
++#elif defined(HAVE_LOCKF)
++ return lockf(fd, (enable ? (block ? F_LOCK : F_TLOCK) : F_ULOCK));
++#else
++# error "No supported lock method. Please port this code."
++#endif
++}
++
++/* Return the number of seconds, when the specified file was last
++ * read. If the atime of that file is < clip_time, use clip_time
++ * instead */
++static time_t fd_last_used(int fd, time_t clip_time) {
++ struct stat st;
++ time_t now, ft;
++ assert(fd >= 0);
++
++ if (fstat(fd, &st) < 0) {
++ rs_log_crit("fstat() failed: %s\n", strerror(errno));
++ return -1;
++ }
++
++ if ((now = time(NULL)) == (time_t) -1) {
++ rs_log_crit("time() failed: %s\n", strerror(errno));
++ return -1;
++ }
++
++ ft = clip_time ? (st.st_atime < clip_time ? clip_time : st.st_atime) : st.st_atime;
++ assert(ft <= now);
++
++ return now - ft;
++}
++
++/* Write host data to host file */
++static int write_hosts(struct daemon_data *d) {
++ struct host *h;
++ int r = 0;
++ assert(d);
++
++ rs_log_info("writing zeroconf data.\n");
++
++ if (generic_lock(d->fd, 1, 1, 1) < 0) {
++ rs_log_crit("lock failed: %s\n", strerror(errno));
++ return -1;
++ }
++
++ if (lseek(d->fd, 0, SEEK_SET) < 0) {
++ rs_log_crit("lseek() failed: %s\n", strerror(errno));
++ return -1;
++ }
++
++ if (ftruncate(d->fd, 0) < 0) {
++ rs_log_crit("ftruncate() failed: %s\n", strerror(errno));
++ return -1;
++ }
++
++ for (h = d->hosts; h; h = h->next) {
++ char t[256], a[AVAHI_ADDRESS_STR_MAX];
++
++ if (h->resolver)
++ /* Not yet fully resolved */
++ continue;
++
++ snprintf(t, sizeof(t), "%s:%u/%i\n", avahi_address_snprint(a, sizeof(a), &h->address), h->port, d->n_slots * h->n_cpus);
++
++ if (dcc_writex(d->fd, t, strlen(t)) != 0) {
++ rs_log_crit("write() failed: %s\n", strerror(errno));
++ goto finish;
++ }
++ }
++
++ r = 0;
++
++finish:
++
++ generic_lock(d->fd, 1, 0, 1);
++ return r;
++
++};
++
++/* Free host data */
++static void free_host(struct host *h) {
++ assert(h);
++
++ if (h->resolver)
++ avahi_service_resolver_free(h->resolver);
++
++ free(h->service);
++ free(h->domain);
++ free(h);
++}
++
++/* Remove a service from the host list */
++static void remove_service(struct daemon_data *d, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *domain) {
++ struct host *h, *p = NULL;
++ assert(d);
++
++ for (h = d->hosts; h; h = h->next) {
++ if (h->interface == interface &&
++ h->protocol == protocol &&
++ !strcmp(h->service, name) &&
++ avahi_domain_equal(h->domain, domain)) {
++
++ if (p)
++ p->next = h->next;
++ else
++ d->hosts = h->next;
++
++ free_host(h);
++
++ break;
++ } else
++ p = h;
++ }
++}
++
++/* Called when a resolve call completes */
++static void resolve_reply(AvahiServiceResolver *UNUSED(r),
++ AvahiIfIndex UNUSED(interface),
++ AvahiProtocol UNUSED(protocol),
++ AvahiResolverEvent event,
++ const char *name,
++ const char *UNUSED(type),
++ const char *UNUSED(domain),
++ const char *UNUSED(host_name),
++ const AvahiAddress *a,
++ uint16_t port,
++ AvahiStringList *txt,
++ AvahiLookupResultFlags UNUSED(flags),
++ void *userdata) {
++
++ struct host *h = userdata;
++
++ switch (event) {
++
++ case AVAHI_RESOLVER_FOUND: {
++ AvahiStringList *i;
++
++ /* Look for the number of CPUs in TXT RRs */
++ for (i = txt; i; i = i->next) {
++ char *key, *value;
++
++ if (avahi_string_list_get_pair(i, &key, &value, NULL) < 0)
++ continue;
++
++ if (!strcmp(key, "cpus"))
++ if ((h->n_cpus = atoi(value)) <= 0)
++ h->n_cpus = 1;
++
++ avahi_free(key);
++ avahi_free(value);
++ }
++
++ h->address = *a;
++ h->port = port;
++
++ avahi_service_resolver_free(h->resolver);
++ h->resolver = NULL;
++
++ /* Write modified hosts file */
++ write_hosts(h->daemon_data);
++
++ break;
++ }
++
++ case AVAHI_RESOLVER_FAILURE:
++
++ rs_log_warning("Failed to resolve service '%s': %s\n", name,
++ avahi_strerror(avahi_client_errno(h->daemon_data->client)));
++
++ free_host(h);
++ break;
++ }
++
++}
++
++/* Called whenever a new service is found or removed */
++static void browse_reply(AvahiServiceBrowser *UNUSED(b),
++ AvahiIfIndex interface,
++ AvahiProtocol protocol,
++ AvahiBrowserEvent event,
++ const char *name,
++ const char *type,
++ const char *domain,
++ AvahiLookupResultFlags UNUSED(flags),
++ void *userdata) {
++
++ struct daemon_data *d = userdata;
++ assert(d);
++
++ switch (event) {
++ case AVAHI_BROWSER_NEW: {
++ struct host *h;
++
++ h = malloc(sizeof(struct host));
++ assert(h);
++
++ rs_log_info("new service: %s\n", name);
++
++ if (!(h->resolver = avahi_service_resolver_new(d->client,
++ interface,
++ protocol,
++ name,
++ type,
++ domain,
++ AVAHI_PROTO_UNSPEC,
++ 0,
++ resolve_reply,
++ h))) {
++ rs_log_warning("Failed to create service resolver for '%s': %s\n", name,
++ avahi_strerror(avahi_client_errno(d->client)));
++
++ free(h);
++
++ } else {
++
++ /* Fill in missing data */
++ h->service = strdup(name);
++ assert(h->service);
++ h->domain = strdup(domain);
++ assert(h->domain);
++ h->daemon_data = d;
++ h->interface = interface;
++ h->protocol = protocol;
++ h->next = d->hosts;
++ h->n_cpus = 1;
++ d->hosts = h;
++ }
++
++ break;
++ }
++
++ case AVAHI_BROWSER_REMOVE:
++
++ rs_log_info("Removed service: %s\n", name);
++
++ remove_service(d, interface, protocol, name, domain);
++ write_hosts(d);
++ break;
++
++ case AVAHI_BROWSER_FAILURE:
++ rs_log_crit("Service Browser failure '%s': %s\n", name,
++ avahi_strerror(avahi_client_errno(d->client)));
++
++ avahi_simple_poll_quit(d->simple_poll);
++ break;
++
++ case AVAHI_BROWSER_CACHE_EXHAUSTED:
++ case AVAHI_BROWSER_ALL_FOR_NOW:
++ ;
++
++ }
++}
++
++static void client_callback(AvahiClient *client, AvahiClientState state, void *userdata) {
++ struct daemon_data *d = userdata;
++
++ switch (state) {
++
++ case AVAHI_CLIENT_FAILURE:
++ rs_log_crit("Client failure: %s\n", avahi_strerror(avahi_client_errno(client)));
++ avahi_simple_poll_quit(d->simple_poll);
++ break;
++
++ case AVAHI_CLIENT_S_COLLISION:
++ case AVAHI_CLIENT_S_REGISTERING:
++ case AVAHI_CLIENT_S_RUNNING:
++ case AVAHI_CLIENT_CONNECTING:
++ ;
++ }
++}
++
++/* The main function of the background daemon */
++static void daemon_proc(const char *host_file, const char *lock_file, int n_slots) {
++ int ret = 1;
++ int lock_fd = -1;
++ struct daemon_data d;
++ time_t clip_time;
++ int error;
++
++ rs_add_logger(rs_logger_syslog, RS_LOG_DEBUG, NULL, 0);
++
++ /* Prepare daemon data structure */
++ d.fd = -1;
++ d.hosts = NULL;
++ d.n_slots = n_slots;
++ d.simple_poll = NULL;
++ d.browser = NULL;
++ d.client = NULL;
++ clip_time = time(NULL);
++
++ rs_log_info("Zeroconf daemon running.\n");
++
++ /* Open daemon lock file and lock it */
++ if ((lock_fd = open(lock_file, O_RDWR|O_CREAT, 0666)) < 0) {
++ rs_log_crit("open('%s') failed: %s\n", lock_file, strerror(errno));
++ goto finish;
++ }
++
++ if (generic_lock(lock_fd, 1, 1, 0) < 0) {
++ /* lock failed, there's probably already another daemon running */
++ goto finish;
++ }
++
++ /* Open host file */
++ if ((d.fd = open(host_file, O_RDWR|O_CREAT, 0666)) < 0) {
++ rs_log_crit("open('%s') failed: %s\n", host_file, strerror(errno));
++ goto finish;
++ }
++
++ /* Clear host file */
++ write_hosts(&d);
++
++ if (!(d.simple_poll = avahi_simple_poll_new())) {
++ rs_log_crit("Failed to create simple poll object.\n");
++ goto finish;
++ }
++
++ if (!(d.client = avahi_client_new(avahi_simple_poll_get(d.simple_poll),
++ 0,
++ client_callback,
++ &d,
++ &error))) {
++ rs_log_crit("Failed to create Avahi client object: %s\n", avahi_strerror(error));
++ goto finish;
++ }
++
++ if (!(d.browser = avahi_service_browser_new(d.client,
++ AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ DCC_DNS_SERVICE_TYPE,
++ NULL,
++ 0,
++ browse_reply,
++ &d))) {
++ rs_log_crit("Failed to create service browser object: %s\n", avahi_strerror(avahi_client_errno(d.client)));
++ goto finish;
++ }
++
++ /* Check whether the host file has been used recently */
++ while (fd_last_used(d.fd, clip_time) <= MAX_IDLE_TIME) {
++
++ /* Iterate the main loop for 500ms */
++ if (avahi_simple_poll_iterate(d.simple_poll, 500) != 0) {
++ rs_log_crit("Event loop exited abnormaly.\n");
++ goto finish;
++ }
++ }
++
++ /* Wer are idle */
++ rs_log_info("Zeroconf daemon unused.\n");
++
++ ret = 0;
++
++finish:
++
++ /* Cleanup */
++ if (lock_fd >= 0) {
++ generic_lock(lock_fd, 1, 0, 0);
++ close(lock_fd);
++ }
++
++ if (d.fd >= 0)
++ close(d.fd);
++
++ while (d.hosts) {
++ struct host *h = d.hosts;
++ d.hosts = d.hosts->next;
++ free_host(h);
++ }
++
++ if (d.client)
++ avahi_client_free(d.client);
++
++ if (d.simple_poll)
++ avahi_simple_poll_free(d.simple_poll);
++
++ rs_log_info("zeroconf daemon ended.\n");
++
++ _exit(ret);
++}
++
++/* Return path to the zeroconf directory in ~/.distcc */
++static int get_zeroconf_dir(char **dir_ret) {
++ static char *cached;
++ int ret;
++
++ if (cached) {
++ *dir_ret = cached;
++ return 0;
++ } else {
++ ret = dcc_get_subdir("zeroconf", dir_ret);
++ if (ret == 0)
++ cached = *dir_ret;
++ return ret;
++ }
++}
++
++/* Get the host list from zeroconf */
++int dcc_zeroconf_add_hosts(struct dcc_hostdef **ret_list, int *ret_nhosts, int n_slots, struct dcc_hostdef **ret_prev) {
++ char host_file[PATH_MAX], lock_file[PATH_MAX], *s = NULL;
++ int lock_fd = -1, host_fd = -1;
++ int fork_daemon = 0;
++ int r = -1;
++ char *dir;
++ struct stat st;
++
++ if (get_zeroconf_dir(&dir) != 0) {
++ rs_log_crit("failed to get zeroconf dir.\n");
++ goto finish;
++ }
++
++ snprintf(lock_file, sizeof(lock_file), "%s/lock", dir);
++ snprintf(host_file, sizeof(host_file), "%s/hosts", dir);
++
++ /* Open lock file */
++ if ((lock_fd = open(lock_file, O_RDWR|O_CREAT, 0666)) < 0) {
++ rs_log_crit("open('%s') failed: %s\n", lock_file, strerror(errno));
++ goto finish;
++ }
++
++ /* Try to lock the lock file */
++ if (generic_lock(lock_fd, 1, 1, 0) >= 0) {
++ /* The lock succeeded => there's no daemon running yet! */
++ fork_daemon = 1;
++ generic_lock(lock_fd, 1, 0, 0);
++ }
++
++ close(lock_fd);
++
++ /* Shall we fork a new daemon? */
++ if (fork_daemon) {
++ pid_t pid;
++
++ rs_log_info("Spawning zeroconf daemon.\n");
++
++ if ((pid = fork()) == -1) {
++ rs_log_crit("fork() failed: %s\n", strerror(errno));
++ goto finish;
++ } else if (pid == 0) {
++ int fd;
++ /* Child */
++
++ /* Close file descriptors and replace them by /dev/null */
++ close(0);
++ close(1);
++ close(2);
++ fd = open("/dev/null", O_RDWR);
++ assert(fd == 0);
++ fd = dup(0);
++ assert(fd == 1);
++ fd = dup(0);
++ assert(fd == 2);
++
++#ifdef HAVE_SETSID
++ setsid();
++#endif
++
++ chdir("/");
++ rs_add_logger(rs_logger_syslog, RS_LOG_DEBUG, NULL, 0);
++ daemon_proc(host_file, lock_file, n_slots);
++ }
++
++ /* Parent */
++
++ /* Wait some time for initial host gathering */
++ usleep(1000000); /* 1000 ms */
++
++ }
++
++ /* Open host list read-only */
++ if ((host_fd = open(host_file, O_RDONLY)) < 0) {
++ rs_log_crit("open('%s') failed: %s\n", host_file, strerror(errno));
++ goto finish;
++ }
++
++ /* A read lock */
++ if (generic_lock(host_fd, 0, 1, 1) < 0) {
++ rs_log_crit("lock failed: %s\n", strerror(errno));
++ goto finish;
++ }
++
++ /* Get file size */
++ if (fstat(host_fd, &st) < 0) {
++ rs_log_crit("stat() failed: %s\n", strerror(errno));
++ goto finish;
++ }
++
++ if (st.st_size >= MAX_FILE_SIZE) {
++ rs_log_crit("file too large.\n");
++ goto finish;
++ }
++
++ /* read file data */
++ s = malloc((size_t) st.st_size+1);
++ assert(s);
++
++ if (dcc_readx(host_fd, s, (size_t) st.st_size) != 0) {
++ rs_log_crit("failed to read from file.\n");
++ goto finish;
++ }
++ s[st.st_size] = 0;
++
++ /* Parse host data */
++ if (dcc_parse_hosts(s, host_file, ret_list, ret_nhosts, ret_prev) != 0) {
++ rs_log_crit("failed to parse host file.\n");
++ goto finish;
++ }
++
++ r = 0;
++
++finish:
++ if (host_fd >= 0) {
++ generic_lock(host_fd, 0, 0, 1);
++ close(host_fd);
++ }
++
++ free(s);
++
++ return r;
++}
++
+--- upstream/src/zeroconf-reg.c 1970-01-01 01:00:00.000000000 +0100
++++ lennart/src/zeroconf-reg.c 2005-11-18 15:34:00.000000000 +0100
+@@ -0,0 +1,297 @@
++/* -*- c-file-style: "java"; indent-tabs-mode: nil -*- */
++
++#include "config.h"
++
++#include <assert.h>
++#include <stdio.h>
++#include <sys/select.h>
++#include <signal.h>
++#include <sys/file.h>
++#include <sys/time.h>
++#include <time.h>
++#include <sys/stat.h>
++#include <sys/poll.h>
++#include <pthread.h>
++#include <stdlib.h>
++#include <unistd.h>
++#include <string.h>
++#include <errno.h>
++
++#include <avahi-common/simple-watch.h>
++#include <avahi-common/error.h>
++#include <avahi-common/alternative.h>
++#include <avahi-common/malloc.h>
++#include <avahi-client/publish.h>
++
++#include "distcc.h"
++#include "zeroconf.h"
++#include "trace.h"
++#include "exitcode.h"
++
++struct context {
++ int thread_running;
++ pthread_t thread_id;
++ pthread_mutex_t mutex;
++ char *name;
++ AvahiSimplePoll *simple_poll;
++ AvahiClient *client;
++ AvahiEntryGroup *group;
++ uint16_t port;
++ int n_cpus;
++};
++
++static void publish_reply(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata);
++
++static void register_stuff(struct context *ctx) {
++
++ if (!ctx->group) {
++
++ if (!(ctx->group = avahi_entry_group_new(ctx->client, publish_reply, ctx))) {
++ rs_log_crit("Failed to create entry group: %s\n", avahi_strerror(avahi_client_errno(ctx->client)));
++ goto fail;
++ }
++
++ }
++
++ if (avahi_entry_group_is_empty(ctx->group)) {
++ char cpus[32];
++
++ snprintf(cpus, sizeof(cpus), "cpus=%i", ctx->n_cpus);
++
++ /* Register our service */
++
++ if (avahi_entry_group_add_service(ctx->group,
++ AVAHI_IF_UNSPEC,
++ AVAHI_PROTO_UNSPEC,
++ 0,
++ ctx->name,
++ DCC_DNS_SERVICE_TYPE,
++ NULL,
++ NULL,
++ ctx->port,
++ "txtvers=1",
++ cpus,
++ "distcc="PACKAGE_VERSION,
++ "gnuhost="GNU_HOST,
++ NULL) < 0) {
++ rs_log_crit("Failed to add service: %s\n", avahi_strerror(avahi_client_errno(ctx->client)));
++ goto fail;
++ }
++
++ if (avahi_entry_group_commit(ctx->group) < 0) {
++ rs_log_crit("Failed to commit entry group: %s\n", avahi_strerror(avahi_client_errno(ctx->client)));
++ goto fail;
++ }
++ }
++
++ return;
++
++ fail:
++ avahi_simple_poll_quit(ctx->simple_poll);
++}
++
++/* Called when publishing of service data completes */
++static void publish_reply(AvahiEntryGroup *UNUSED(g), AvahiEntryGroupState state, void *userdata) {
++ struct context *ctx = userdata;
++
++ switch (state) {
++
++ case AVAHI_ENTRY_GROUP_COLLISION: {
++ char *n;
++
++ /* Pick a new name for our service */
++
++ n = avahi_alternative_service_name(ctx->name);
++ assert(n);
++
++ avahi_free(ctx->name);
++ ctx->name = n;
++
++ register_stuff(ctx);
++ break;
++ }
++
++ case AVAHI_ENTRY_GROUP_FAILURE:
++ rs_log_crit("Failed to register service: %s\n", avahi_strerror(avahi_client_errno(ctx->client)));
++ avahi_simple_poll_quit(ctx->simple_poll);
++ break;
++
++ case AVAHI_ENTRY_GROUP_UNCOMMITED:
++ case AVAHI_ENTRY_GROUP_REGISTERING:
++ case AVAHI_ENTRY_GROUP_ESTABLISHED:
++ ;
++ }
++}
++
++static void client_callback(AvahiClient *client, AvahiClientState state, void *userdata) {
++ struct context *ctx = userdata;
++
++ ctx->client = client;
++
++ switch (state) {
++
++ case AVAHI_CLIENT_S_RUNNING:
++
++ register_stuff(ctx);
++ break;
++
++ case AVAHI_CLIENT_S_COLLISION:
++
++ if (ctx->group)
++ avahi_entry_group_reset(ctx->group);
++ break;
++
++ case AVAHI_CLIENT_FAILURE:
++
++ if (avahi_client_errno(client) == AVAHI_ERR_DISCONNECTED) {
++ int error;
++
++ avahi_client_free(ctx->client);
++ ctx->client = NULL;
++ ctx->group = NULL;
++
++ /* Reconnect to the server */
++
++ if (!(ctx->client = avahi_client_new(avahi_simple_poll_get(ctx->simple_poll),
++ AVAHI_CLIENT_NO_FAIL,
++ client_callback,
++ ctx,
++ &error))) {
++
++ rs_log_crit("Failed to contact server: %s\n", avahi_strerror(error));
++ avahi_simple_poll_quit(ctx->simple_poll);
++ }
++
++ } else {
++ rs_log_crit("Client failure: %s\n", avahi_strerror(avahi_client_errno(client)));
++ avahi_simple_poll_quit(ctx->simple_poll);
++ }
++
++ break;
++
++ case AVAHI_CLIENT_S_REGISTERING:
++ case AVAHI_CLIENT_CONNECTING:
++ ;
++ }
++}
++
++static void* thread(void *userdata) {
++ struct context *ctx = userdata;
++ sigset_t mask;
++ int r;
++
++ /* Make sure that signals are delivered to the main thread */
++ sigfillset(&mask);
++ pthread_sigmask(SIG_BLOCK, &mask, NULL);
++
++ pthread_mutex_lock(&ctx->mutex);
++
++ /* Run the main loop */
++ r = avahi_simple_poll_loop(ctx->simple_poll);
++
++ /* Cleanup some stuff */
++ if (ctx->client)
++ avahi_client_free(ctx->client);
++ ctx->client = NULL;
++ ctx->group = NULL;
++
++ pthread_mutex_unlock(&ctx->mutex);
++
++ return NULL;
++}
++
++static int poll_func(struct pollfd *ufds, unsigned int nfds, int timeout, void *userdata) {
++ pthread_mutex_t *mutex = userdata;
++ int r;
++
++ /* Before entering poll() we unlock the mutex, so that
++ * avahi_simple_poll_quit() can succeed from another thread. */
++
++ pthread_mutex_unlock(mutex);
++ r = poll(ufds, nfds, timeout);
++ pthread_mutex_lock(mutex);
++
++ return r;
++}
++
++/* register a distcc service in DNS-SD/mDNS with the given port and number of CPUs */
++void* dcc_zeroconf_register(uint16_t port, int n_cpus) {
++ struct context *ctx = NULL;
++
++ char service[256] = "distcc@";
++ int error, ret;
++
++ ctx = malloc(sizeof(struct context));
++ assert(ctx);
++ ctx->client = NULL;
++ ctx->group = NULL;
++ ctx->simple_poll = NULL;
++ ctx->thread_running = 0;
++ ctx->port = port;
++ ctx->n_cpus = n_cpus;
++ pthread_mutex_init(&ctx->mutex, NULL);
++
++ /* Prepare service name */
++ gethostname(service+7, sizeof(service)-8);
++ service[sizeof(service)-1] = 0;
++
++ ctx->name = strdup(service);
++ assert(ctx->name);
++
++ if (!(ctx->simple_poll = avahi_simple_poll_new())) {
++ rs_log_crit("Failed to create event loop object.\n");
++ goto fail;
++ }
++
++ avahi_simple_poll_set_func(ctx->simple_poll, poll_func, &ctx->mutex);
++
++ if (!(ctx->client = avahi_client_new(avahi_simple_poll_get(ctx->simple_poll), AVAHI_CLIENT_NO_FAIL, client_callback, ctx, &error))) {
++ rs_log_crit("Failed to create client object: %s\n", avahi_strerror(avahi_client_errno(ctx->client)));
++ goto fail;
++ }
++
++ /* Create the mDNS event handler */
++ if ((ret = pthread_create(&ctx->thread_id, NULL, thread, ctx)) < 0) {
++ rs_log_crit("Failed to create thread: %s\n", strerror(ret));
++ goto fail;
++ }
++
++ ctx->thread_running = 1;
++
++ return ctx;
++
++ fail:
++
++ if (ctx)
++ dcc_zeroconf_unregister(ctx);
++
++ return NULL;
++}
++
++/* Unregister this server from DNS-SD/mDNS */
++int dcc_zeroconf_unregister(void *u) {
++ struct context *ctx = u;
++
++ if (ctx->thread_running) {
++ pthread_mutex_lock(&ctx->mutex);
++ avahi_simple_poll_quit(ctx->simple_poll);
++ pthread_mutex_unlock(&ctx->mutex);
++
++ pthread_join(ctx->thread_id, NULL);
++ ctx->thread_running = 0;
++ }
++
++ avahi_free(ctx->name);
++
++ if (ctx->client)
++ avahi_client_free(ctx->client);
++
++ if (ctx->simple_poll)
++ avahi_simple_poll_free(ctx->simple_poll);
++
++ pthread_mutex_destroy(&ctx->mutex);
++
++ free(ctx);
++
++ return 0;
++}
