Adding upstream version 14.2.upstream/14.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1247 insertions, 0 deletions

diff --git a/src/daemon/main.c b/src/daemon/main.c
new file mode 100644
index 0000000..30ef499
--- /dev/null
+++ b/src/daemon/main.c
@@ -0,0 +1,1247 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <signal.h>
+#include <stddef.h>
+#include <ltdl.h>
+#include <limits.h>
+#include <unistd.h>
+#include <locale.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#ifdef HAVE_PWD_H
+#include <pwd.h>
+#endif
+#ifdef HAVE_GRP_H
+#include <grp.h>
+#endif
+
+#ifdef HAVE_LIBWRAP
+#include <syslog.h>
+#include <tcpd.h>
+#endif
+
+#ifdef HAVE_DBUS
+#include <dbus/dbus.h>
+#endif
+
+#ifdef HAVE_SYSTEMD_DAEMON
+#include <systemd/sd-daemon.h>
+#endif
+
+#include <pulse/client-conf.h>
+#include <pulse/mainloop.h>
+#include <pulse/mainloop-signal.h>
+#include <pulse/timeval.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/i18n.h>
+#include <pulsecore/lock-autospawn.h>
+#include <pulsecore/socket.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/core-rtclock.h>
+#include <pulsecore/core-scache.h>
+#include <pulsecore/core.h>
+#include <pulsecore/module.h>
+#include <pulsecore/cli-command.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/sioman.h>
+#include <pulsecore/cli-text.h>
+#include <pulsecore/pid.h>
+#include <pulsecore/random.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/shm.h>
+#include <pulsecore/memtrap.h>
+#include <pulsecore/strlist.h>
+#ifdef HAVE_DBUS
+#include <pulsecore/dbus-shared.h>
+#endif
+#include <pulsecore/cpu.h>
+
+#include "cmdline.h"
+#include "cpulimit.h"
+#include "daemon-conf.h"
+#include "dumpmodules.h"
+#include "caps.h"
+#include "ltdl-bind-now.h"
+#include "server-lookup.h"
+
+#ifdef DISABLE_LIBTOOL_PRELOAD
+/* FIXME: work around a libtool bug by making sure we have 2 elements. Bug has
+ * been reported: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29576 */
+const lt_dlsymlist lt_preloaded_symbols[] = {
+    { "@PROGRAM@", NULL },
+    { NULL, NULL }
+};
+#endif
+
+#ifdef HAVE_LIBWRAP
+/* Only one instance of these variables */
+int allow_severity = LOG_INFO;
+int deny_severity = LOG_WARNING;
+#endif
+
+#ifdef HAVE_OSS_WRAPPER
+/* padsp looks for this symbol in the running process and disables
+ * itself if it finds it and it is set to 7 (which is actually a bit
+ * mask). For details see padsp. */
+int __padsp_disabled__ = 7;
+#endif
+
+static void signal_callback(pa_mainloop_api* m, pa_signal_event *e, int sig, void *userdata) {
+    pa_module *module = NULL;
+
+    pa_log_info("Got signal %s.", pa_sig2str(sig));
+
+    switch (sig) {
+#ifdef SIGUSR1
+        case SIGUSR1:
+            pa_module_load(&module, userdata, "module-cli", NULL);
+            break;
+#endif
+
+#ifdef SIGUSR2
+        case SIGUSR2:
+            pa_module_load(&module, userdata, "module-cli-protocol-unix", NULL);
+            break;
+#endif
+
+#ifdef SIGHUP
+        case SIGHUP: {
+            char *c = pa_full_status_string(userdata);
+            pa_log_notice("%s", c);
+            pa_xfree(c);
+            return;
+        }
+#endif
+
+        case SIGINT:
+        case SIGTERM:
+        default:
+            pa_log_info("Exiting.");
+            m->quit(m, 0);
+            break;
+    }
+}
+
+#if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
+
+static int change_user(void) {
+    struct passwd *pw;
+    struct group * gr;
+    int r;
+
+    /* This function is called only in system-wide mode. It creates a
+     * runtime dir in /var/run/ with proper UID/GID and drops privs
+     * afterwards. */
+
+    if (!(pw = getpwnam(PA_SYSTEM_USER))) {
+        pa_log(_("Failed to find user '%s'."), PA_SYSTEM_USER);
+        return -1;
+    }
+
+    if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
+        pa_log(_("Failed to find group '%s'."), PA_SYSTEM_GROUP);
+        return -1;
+    }
+
+    pa_log_info("Found user '%s' (UID %lu) and group '%s' (GID %lu).",
+                PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
+                PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
+
+    if (pw->pw_gid != gr->gr_gid) {
+        pa_log(_("GID of user '%s' and of group '%s' don't match."), PA_SYSTEM_USER, PA_SYSTEM_GROUP);
+        return -1;
+    }
+
+    if (!pa_streq(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH))
+        pa_log_warn(_("Home directory of user '%s' is not '%s', ignoring."), PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
+
+    if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid, true) < 0) {
+        pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
+        return -1;
+    }
+
+    if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid, true) < 0) {
+        pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno));
+        return -1;
+    }
+
+    /* We don't create the config dir here, because we don't need to write to it */
+
+    if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
+        pa_log(_("Failed to change group list: %s"), pa_cstrerror(errno));
+        return -1;
+    }
+
+#if defined(HAVE_SETRESGID)
+    r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
+#elif defined(HAVE_SETEGID)
+    if ((r = setgid(gr->gr_gid)) >= 0)
+        r = setegid(gr->gr_gid);
+#elif defined(HAVE_SETREGID)
+    r = setregid(gr->gr_gid, gr->gr_gid);
+#else
+#error "No API to drop privileges"
+#endif
+
+    if (r < 0) {
+        pa_log(_("Failed to change GID: %s"), pa_cstrerror(errno));
+        return -1;
+    }
+
+#if defined(HAVE_SETRESUID)
+    r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
+#elif defined(HAVE_SETEUID)
+    if ((r = setuid(pw->pw_uid)) >= 0)
+        r = seteuid(pw->pw_uid);
+#elif defined(HAVE_SETREUID)
+    r = setreuid(pw->pw_uid, pw->pw_uid);
+#else
+#error "No API to drop privileges"
+#endif
+
+    if (r < 0) {
+        pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno));
+        return -1;
+    }
+
+    pa_drop_caps();
+
+    pa_set_env("USER", PA_SYSTEM_USER);
+    pa_set_env("USERNAME", PA_SYSTEM_USER);
+    pa_set_env("LOGNAME", PA_SYSTEM_USER);
+    pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
+
+    /* Relevant for pa_runtime_path() */
+    if (!getenv("PULSE_RUNTIME_PATH"))
+        pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
+
+    if (!getenv("PULSE_CONFIG_PATH"))
+        pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH);
+
+    if (!getenv("PULSE_STATE_PATH"))
+        pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH);
+
+    pa_log_info("Successfully changed user to \"" PA_SYSTEM_USER "\".");
+
+    return 0;
+}
+
+#else /* HAVE_PWD_H && HAVE_GRP_H */
+
+static int change_user(void) {
+    pa_log(_("System wide mode unsupported on this platform."));
+    return -1;
+}
+
+#endif /* HAVE_PWD_H && HAVE_GRP_H */
+
+#ifdef HAVE_SYS_RESOURCE_H
+
+static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
+    struct rlimit rl;
+    pa_assert(r);
+
+    if (!r->is_set)
+        return 0;
+
+    rl.rlim_cur = rl.rlim_max = r->value;
+
+    if (setrlimit(resource, &rl) < 0) {
+        pa_log_info("setrlimit(%s, (%u, %u)) failed: %s", name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
+        return -1;
+    }
+
+    return 0;
+}
+
+static void set_all_rlimits(const pa_daemon_conf *conf) {
+    set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
+    set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
+    set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
+    set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
+#ifdef RLIMIT_RSS
+    set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
+#endif
+#ifdef RLIMIT_NPROC
+    set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
+#endif
+#ifdef RLIMIT_NOFILE
+    set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
+#endif
+#ifdef RLIMIT_MEMLOCK
+    set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
+#endif
+#ifdef RLIMIT_AS
+    set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
+#endif
+#ifdef RLIMIT_LOCKS
+    set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
+#endif
+#ifdef RLIMIT_SIGPENDING
+    set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
+#endif
+#ifdef RLIMIT_MSGQUEUE
+    set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
+#endif
+#ifdef RLIMIT_NICE
+    set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
+#endif
+#ifdef RLIMIT_RTPRIO
+    set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
+#endif
+#ifdef RLIMIT_RTTIME
+    set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
+#endif
+}
+#endif
+
+static char *check_configured_address(void) {
+    char *default_server = NULL;
+    pa_client_conf *c = pa_client_conf_new();
+
+    pa_client_conf_load(c, true, true);
+
+    if (c->default_server && *c->default_server)
+        default_server = pa_xstrdup(c->default_server);
+
+    pa_client_conf_free(c);
+
+    return default_server;
+}
+
+#ifdef HAVE_DBUS
+static pa_dbus_connection *register_dbus_name(pa_core *c, DBusBusType bus, const char* name) {
+    DBusError error;
+    pa_dbus_connection *conn;
+
+    dbus_error_init(&error);
+
+    if (!(conn = pa_dbus_bus_get(c, bus, &error)) || dbus_error_is_set(&error)) {
+        pa_log_warn("Unable to contact D-Bus: %s: %s", error.name, error.message);
+        goto fail;
+    }
+
+    if (dbus_bus_request_name(pa_dbus_connection_get(conn), name, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
+        pa_log_debug("Got %s!", name);
+        return conn;
+    }
+
+    if (dbus_error_is_set(&error))
+        pa_log_error("Failed to acquire %s: %s: %s", name, error.name, error.message);
+    else
+        pa_log_error("D-Bus name %s already taken.", name);
+
+    /* PA cannot be started twice by the same user and hence we can
+     * ignore mostly the case that a name is already taken. */
+
+fail:
+    if (conn)
+        pa_dbus_connection_unref(conn);
+
+    dbus_error_free(&error);
+    return NULL;
+}
+#endif
+
+int main(int argc, char *argv[]) {
+    pa_core *c = NULL;
+    pa_strbuf *buf = NULL;
+    pa_daemon_conf *conf = NULL;
+    pa_mainloop *mainloop = NULL;
+    char *s;
+    char *configured_address;
+    int r = 0, retval = 1, d = 0;
+    bool valid_pid_file = false;
+    bool ltdl_init = false;
+    int n_fds = 0, *passed_fds = NULL;
+    const char *e;
+#ifdef HAVE_FORK
+    int daemon_pipe[2] = { -1, -1 };
+    int daemon_pipe2[2] = { -1, -1 };
+#endif
+    int autospawn_fd = -1;
+    bool autospawn_locked = false;
+#ifdef HAVE_DBUS
+    pa_dbusobj_server_lookup *server_lookup = NULL; /* /org/pulseaudio/server_lookup */
+    pa_dbus_connection *lookup_service_bus = NULL; /* Always the user bus. */
+    pa_dbus_connection *server_bus = NULL; /* The bus where we reserve org.pulseaudio.Server, either the user or the system bus. */
+    bool start_server;
+#endif
+
+    pa_log_set_ident("pulseaudio");
+    pa_log_set_level(PA_LOG_NOTICE);
+    pa_log_set_flags(PA_LOG_COLORS|PA_LOG_PRINT_FILE|PA_LOG_PRINT_LEVEL, PA_LOG_RESET);
+
+#if !defined(HAVE_BIND_NOW) && defined(__linux__) && defined(__OPTIMIZE__)
+    /*
+       Disable lazy relocations to make usage of external libraries
+       more deterministic for our RT threads. We abuse __OPTIMIZE__ as
+       a check whether we are a debug build or not. This all is
+       admittedly a bit snake-oilish.
+    */
+
+    if (!getenv("LD_BIND_NOW")) {
+        char *rp;
+        char *canonical_rp;
+
+        /* We have to execute ourselves, because the libc caches the
+         * value of $LD_BIND_NOW on initialization. */
+
+        pa_set_env("LD_BIND_NOW", "1");
+
+        if ((canonical_rp = pa_realpath(PA_BINARY))) {
+
+            if ((rp = pa_readlink("/proc/self/exe"))) {
+
+                if (pa_streq(rp, canonical_rp))
+                    pa_assert_se(execv(rp, argv) == 0);
+                else
+                    pa_log_warn("/proc/self/exe does not point to %s, cannot self execute. Are you playing games?", canonical_rp);
+
+                pa_xfree(rp);
+
+            } else
+                pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?");
+
+            pa_xfree(canonical_rp);
+
+        } else
+            pa_log_warn("Couldn't canonicalize binary path, cannot self execute.");
+    }
+#endif
+
+#ifdef HAVE_SYSTEMD_DAEMON
+    n_fds = sd_listen_fds(0);
+    if (n_fds > 0) {
+        int i = n_fds;
+
+        passed_fds = pa_xnew(int, n_fds+2);
+        passed_fds[n_fds] = passed_fds[n_fds+1] = -1;
+        while (i--)
+            passed_fds[i] = SD_LISTEN_FDS_START + i;
+    }
+#endif
+
+    if (!passed_fds) {
+        n_fds = 0;
+        passed_fds = pa_xnew(int, 2);
+        passed_fds[0] = passed_fds[1] = -1;
+    }
+
+    if ((e = getenv("PULSE_PASSED_FD"))) {
+        int passed_fd = atoi(e);
+        if (passed_fd > 2)
+            passed_fds[n_fds] = passed_fd;
+    }
+
+    /* We might be autospawned, in which case have no idea in which
+     * context we have been started. Let's cleanup our execution
+     * context as good as possible */
+
+    pa_reset_personality();
+    pa_drop_root();
+    pa_close_allv(passed_fds);
+    pa_xfree(passed_fds);
+    pa_reset_sigs(-1);
+    pa_unblock_sigs(-1);
+    pa_reset_priority();
+
+    setlocale(LC_ALL, "");
+    pa_init_i18n();
+
+    conf = pa_daemon_conf_new();
+
+    if (pa_daemon_conf_load(conf, NULL) < 0)
+        goto finish;
+
+    if (pa_daemon_conf_env(conf) < 0)
+        goto finish;
+
+    if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
+        pa_log(_("Failed to parse command line."));
+        goto finish;
+    }
+
+    if (conf->log_target)
+        pa_log_set_target(conf->log_target);
+    else {
+        pa_log_target target = { .type = PA_LOG_STDERR, .file = NULL };
+        pa_log_set_target(&target);
+    }
+
+    pa_log_set_level(conf->log_level);
+    if (conf->log_meta)
+        pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
+    if (conf->log_time)
+        pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
+    pa_log_set_show_backtrace(conf->log_backtrace);
+
+#ifdef HAVE_DBUS
+    /* conf->system_instance and conf->local_server_type control almost the
+     * same thing; make them agree about what is requested. */
+    switch (conf->local_server_type) {
+        case PA_SERVER_TYPE_UNSET:
+            conf->local_server_type = conf->system_instance ? PA_SERVER_TYPE_SYSTEM : PA_SERVER_TYPE_USER;
+            break;
+        case PA_SERVER_TYPE_USER:
+        case PA_SERVER_TYPE_NONE:
+            conf->system_instance = false;
+            break;
+        case PA_SERVER_TYPE_SYSTEM:
+            conf->system_instance = true;
+            break;
+        default:
+            pa_assert_not_reached();
+    }
+
+    start_server = conf->local_server_type == PA_SERVER_TYPE_USER || (getuid() == 0 && conf->local_server_type == PA_SERVER_TYPE_SYSTEM);
+
+    if (!start_server && conf->local_server_type == PA_SERVER_TYPE_SYSTEM) {
+        pa_log_notice(_("System mode refused for non-root user. Only starting the D-Bus server lookup service."));
+        conf->system_instance = false;
+    }
+#endif
+
+    LTDL_SET_PRELOADED_SYMBOLS();
+    pa_ltdl_init();
+    ltdl_init = true;
+
+    if (conf->dl_search_path)
+        lt_dlsetsearchpath(conf->dl_search_path);
+
+#ifdef OS_IS_WIN32
+    {
+        WSADATA data;
+        WSAStartup(MAKEWORD(2, 0), &data);
+    }
+#endif
+
+    pa_random_seed();
+
+    switch (conf->cmd) {
+        case PA_CMD_DUMP_MODULES:
+            pa_dump_modules(conf, argc-d, argv+d);
+            retval = 0;
+            goto finish;
+
+        case PA_CMD_DUMP_CONF: {
+
+            if (d < argc) {
+                pa_log("Too many arguments.");
+                goto finish;
+            }
+
+            s = pa_daemon_conf_dump(conf);
+            fputs(s, stdout);
+            pa_xfree(s);
+            retval = 0;
+            goto finish;
+        }
+
+        case PA_CMD_DUMP_RESAMPLE_METHODS: {
+            int i;
+
+            if (d < argc) {
+                pa_log("Too many arguments.");
+                goto finish;
+            }
+
+            for (i = 0; i < PA_RESAMPLER_MAX; i++)
+                if (pa_resample_method_supported(i))
+                    printf("%s\n", pa_resample_method_to_string(i));
+
+            retval = 0;
+            goto finish;
+        }
+
+        case PA_CMD_HELP :
+            pa_cmdline_help(argv[0]);
+            retval = 0;
+            goto finish;
+
+        case PA_CMD_VERSION :
+
+            if (d < argc) {
+                pa_log("Too many arguments.");
+                goto finish;
+            }
+
+            printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
+            retval = 0;
+            goto finish;
+
+        case PA_CMD_CHECK: {
+            pid_t pid;
+
+            if (d < argc) {
+                pa_log("Too many arguments.");
+                goto finish;
+            }
+
+            if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
+                pa_log_info("Daemon not running");
+            else {
+                pa_log_info("Daemon running as PID %u", pid);
+                retval = 0;
+            }
+
+            goto finish;
+
+        }
+        case PA_CMD_KILL:
+
+            if (d < argc) {
+                pa_log("Too many arguments.");
+                goto finish;
+            }
+
+            if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
+                pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
+            else
+                retval = 0;
+
+            goto finish;
+
+        case PA_CMD_CLEANUP_SHM:
+
+            if (d < argc) {
+                pa_log("Too many arguments.");
+                goto finish;
+            }
+
+            if (pa_shm_cleanup() >= 0)
+                retval = 0;
+
+            goto finish;
+
+        default:
+            pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
+    }
+
+    if (d < argc) {
+        pa_log("Too many arguments.");
+        goto finish;
+    }
+
+#ifdef HAVE_GETUID
+    if (getuid() == 0 && !conf->system_instance)
+        pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
+#ifndef HAVE_DBUS /* A similar, only a notice worthy check was done earlier, if D-Bus is enabled. */
+    else if (getuid() != 0 && conf->system_instance) {
+        pa_log(_("Root privileges required."));
+        goto finish;
+    }
+#endif
+#endif  /* HAVE_GETUID */
+
+    if (conf->cmd == PA_CMD_START && conf->system_instance) {
+        pa_log(_("--start not supported for system instances."));
+        goto finish;
+    }
+
+    if (conf->cmd == PA_CMD_START && (configured_address = check_configured_address())) {
+        /* There is an server address in our config, but where did it come from?
+         * By default a standard X11 login will load module-x11-publish which will
+         * inject PULSE_SERVER X11 property. If the PA daemon crashes, we will end
+         * up hitting this code path. So we have to check to see if our configured_address
+         * is the same as the value that would go into this property so that we can
+         * recover (i.e. autospawn) from a crash.
+         */
+        char *ufn;
+        bool start_anyway = false;
+
+        if ((ufn = pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET))) {
+            char *id;
+
+            if ((id = pa_machine_id())) {
+                pa_strlist *server_list;
+                char formatted_ufn[256];
+
+                pa_snprintf(formatted_ufn, sizeof(formatted_ufn), "{%s}unix:%s", id, ufn);
+                pa_xfree(id);
+
+                if ((server_list = pa_strlist_parse(configured_address))) {
+                    char *u = NULL;
+
+                    /* We only need to check the first server */
+                    server_list = pa_strlist_pop(server_list, &u);
+                    pa_strlist_free(server_list);
+
+                    start_anyway = (u && pa_streq(formatted_ufn, u));
+                    pa_xfree(u);
+                }
+            }
+            pa_xfree(ufn);
+        }
+
+        if (!start_anyway) {
+            pa_log_notice(_("User-configured server at %s, refusing to start/autospawn."), configured_address);
+            pa_xfree(configured_address);
+            retval = 0;
+            goto finish;
+        }
+
+        pa_log_notice(_("User-configured server at %s, which appears to be local. Probing deeper."), configured_address);
+        pa_xfree(configured_address);
+    }
+
+    if (conf->system_instance && !conf->disallow_exit)
+        pa_log_warn(_("Running in system mode, but --disallow-exit not set."));
+
+    if (conf->system_instance && !conf->disallow_module_loading)
+        pa_log_warn(_("Running in system mode, but --disallow-module-loading not set."));
+
+    if (conf->system_instance && !conf->disable_shm) {
+        pa_log_notice(_("Running in system mode, forcibly disabling SHM mode."));
+        conf->disable_shm = true;
+    }
+
+    if (conf->system_instance && conf->exit_idle_time >= 0) {
+        pa_log_notice(_("Running in system mode, forcibly disabling exit idle time."));
+        conf->exit_idle_time = -1;
+    }
+
+    if (conf->cmd == PA_CMD_START) {
+        /* If we shall start PA only when it is not running yet, we
+         * first take the autospawn lock to make things
+         * synchronous. */
+
+        /* This locking and thread synchronisation code doesn't work reliably
+         * on kFreeBSD (Debian bug #705435), or in upstream FreeBSD ports
+         * (bug reference: ports/128947, patched in SVN r231972). */
+#if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
+        if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
+            pa_log("Failed to initialize autospawn lock");
+            goto finish;
+        }
+
+        if ((pa_autospawn_lock_acquire(true) < 0)) {
+            pa_log("Failed to acquire autospawn lock");
+            goto finish;
+        }
+
+        autospawn_locked = true;
+#endif
+    }
+
+    if (conf->daemonize) {
+#ifdef HAVE_FORK
+        pid_t child;
+#endif
+
+        if (pa_stdio_acquire() < 0) {
+            pa_log(_("Failed to acquire stdio."));
+            goto finish;
+        }
+
+#ifdef HAVE_FORK
+        if (pipe(daemon_pipe) < 0) {
+            pa_log(_("pipe() failed: %s"), pa_cstrerror(errno));
+            goto finish;
+        }
+
+        if ((child = fork()) < 0) {
+            pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
+            pa_close_pipe(daemon_pipe);
+            goto finish;
+        }
+
+        if (child != 0) {
+            ssize_t n;
+            /* Father */
+
+            pa_assert_se(pa_close(daemon_pipe[1]) == 0);
+            daemon_pipe[1] = -1;
+
+            if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
+
+                if (n < 0)
+                    pa_log(_("read() failed: %s"), pa_cstrerror(errno));
+
+                retval = 1;
+            }
+
+            if (retval)
+                pa_log(_("Daemon startup failed."));
+            else
+                pa_log_info("Daemon startup successful.");
+
+            goto finish;
+        }
+
+        if (autospawn_fd >= 0) {
+            /* The lock file is unlocked from the parent, so we need
+             * to close it in the child */
+
+            pa_autospawn_lock_release();
+            pa_autospawn_lock_done(true);
+
+            autospawn_locked = false;
+            autospawn_fd = -1;
+        }
+
+        pa_assert_se(pa_close(daemon_pipe[0]) == 0);
+        daemon_pipe[0] = -1;
+#endif
+
+        if (!conf->log_target) {
+#ifdef HAVE_SYSTEMD_JOURNAL
+            pa_log_target target = { .type = PA_LOG_JOURNAL, .file = NULL };
+#else
+            pa_log_target target = { .type = PA_LOG_SYSLOG, .file = NULL };
+#endif
+            pa_log_set_target(&target);
+        }
+
+#ifdef HAVE_SETSID
+        if (setsid() < 0) {
+            pa_log(_("setsid() failed: %s"), pa_cstrerror(errno));
+            goto finish;
+        }
+#endif
+
+#ifdef HAVE_FORK
+        /* We now are a session and process group leader. Let's fork
+         * again and let the father die, so that we'll become a
+         * process that can never acquire a TTY again, in a session and
+         * process group without leader */
+
+        if (pipe(daemon_pipe2) < 0) {
+            pa_log(_("pipe() failed: %s"), pa_cstrerror(errno));
+            goto finish;
+        }
+
+        if ((child = fork()) < 0) {
+            pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
+            pa_close_pipe(daemon_pipe2);
+            goto finish;
+        }
+
+        if (child != 0) {
+            ssize_t n;
+            /* Father */
+
+            pa_assert_se(pa_close(daemon_pipe2[1]) == 0);
+            daemon_pipe2[1] = -1;
+
+            if ((n = pa_loop_read(daemon_pipe2[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
+
+                if (n < 0)
+                    pa_log(_("read() failed: %s"), pa_cstrerror(errno));
+
+                retval = 1;
+            }
+
+            /* We now have to take care of signalling the first fork with
+             * the return value we've received from this fork... */
+            pa_assert(daemon_pipe[1] >= 0);
+
+            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
+            pa_close(daemon_pipe[1]);
+            daemon_pipe[1] = -1;
+
+            goto finish;
+        }
+
+        pa_assert_se(pa_close(daemon_pipe2[0]) == 0);
+        daemon_pipe2[0] = -1;
+
+        /* We no longer need the (first) daemon_pipe as it's handled in our child above */
+        pa_close_pipe(daemon_pipe);
+#endif
+
+#ifdef SIGTTOU
+        signal(SIGTTOU, SIG_IGN);
+#endif
+#ifdef SIGTTIN
+        signal(SIGTTIN, SIG_IGN);
+#endif
+#ifdef SIGTSTP
+        signal(SIGTSTP, SIG_IGN);
+#endif
+
+        pa_nullify_stdfds();
+    }
+
+    pa_set_env_and_record("PULSE_INTERNAL", "1");
+    pa_assert_se(chdir("/") == 0);
+    umask(0077);
+
+#ifdef HAVE_SYS_RESOURCE_H
+    set_all_rlimits(conf);
+#endif
+    pa_rtclock_hrtimer_enable();
+
+    if (conf->high_priority)
+        pa_raise_priority(conf->nice_level);
+
+    if (conf->system_instance)
+        if (change_user() < 0)
+            goto finish;
+
+    pa_set_env_and_record("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
+
+    pa_log_info("This is PulseAudio %s", PACKAGE_VERSION);
+    pa_log_debug("Compilation CFLAGS: %s", PA_CFLAGS);
+
+#ifdef HAVE_LIBSAMPLERATE
+    pa_log_warn("Compiled with DEPRECATED libsamplerate support!");
+#endif
+
+    s = pa_uname_string();
+    pa_log_debug("Running on host: %s", s);
+    pa_xfree(s);
+
+    pa_log_debug("Found %u CPUs.", pa_ncpus());
+
+    pa_log_info("Page size is %zu bytes", pa_page_size());
+
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+    pa_log_debug("Compiled with Valgrind support: yes");
+#else
+    pa_log_debug("Compiled with Valgrind support: no");
+#endif
+
+    pa_log_debug("Running in valgrind mode: %s", pa_yes_no(pa_in_valgrind()));
+
+    pa_log_debug("Running in VM: %s", pa_yes_no(pa_running_in_vm()));
+
+#ifdef HAVE_RUNNING_FROM_BUILD_TREE
+    pa_log_debug("Running from build tree: %s", pa_yes_no(pa_run_from_build_tree()));
+#else
+    pa_log_debug("Running from build tree: no");
+#endif
+
+#ifdef __OPTIMIZE__
+    pa_log_debug("Optimized build: yes");
+#else
+    pa_log_debug("Optimized build: no");
+#endif
+
+#ifdef NDEBUG
+    pa_log_debug("NDEBUG defined, all asserts disabled.");
+#elif defined(FASTPATH)
+    pa_log_debug("FASTPATH defined, only fast path asserts disabled.");
+#else
+    pa_log_debug("All asserts enabled.");
+#endif
+
+    if (!(s = pa_machine_id())) {
+        pa_log(_("Failed to get machine ID"));
+        goto finish;
+    }
+    pa_log_info("Machine ID is %s.", s);
+    pa_xfree(s);
+
+    if ((s = pa_session_id())) {
+        pa_log_info("Session ID is %s.", s);
+        pa_xfree(s);
+    }
+
+    if (!(s = pa_get_runtime_dir()))
+        goto finish;
+    pa_log_info("Using runtime directory %s.", s);
+    pa_xfree(s);
+
+    if (!(s = pa_get_state_dir()))
+        goto finish;
+    pa_log_info("Using state directory %s.", s);
+    pa_xfree(s);
+
+    pa_log_info("Using modules directory %s.", conf->dl_search_path);
+
+    pa_log_info("Running in system mode: %s", pa_yes_no(pa_in_system_mode()));
+
+    if (pa_in_system_mode())
+        pa_log_warn(_("OK, so you are running PA in system mode. Please make sure that you actually do want to do that.\n"
+                      "Please read http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ for an explanation why system mode is usually a bad idea."));
+
+    if (conf->use_pid_file) {
+        int z;
+
+        if ((z = pa_pid_file_create("pulseaudio")) != 0) {
+
+            if (conf->cmd == PA_CMD_START && z > 0) {
+                /* If we are already running and with are run in
+                 * --start mode, then let's return this as success. */
+
+                retval = 0;
+                goto finish;
+            }
+
+            pa_log(_("pa_pid_file_create() failed."));
+            goto finish;
+        }
+
+        valid_pid_file = true;
+    }
+
+    pa_disable_sigpipe();
+
+    if (pa_rtclock_hrtimer())
+        pa_log_info("System supports high resolution timers");
+    else
+        pa_log_info("System appears to not support high resolution timers");
+
+    if (conf->lock_memory) {
+#if defined(HAVE_SYS_MMAN_H) && !defined(__ANDROID__)
+        if (mlockall(MCL_FUTURE) < 0)
+            pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
+        else
+            pa_log_info("Successfully locked process into memory.");
+#else
+        pa_log_warn("Memory locking requested but not supported on platform.");
+#endif
+    }
+
+    pa_memtrap_install();
+
+    pa_assert_se(mainloop = pa_mainloop_new());
+
+    if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm,
+                          !conf->disable_shm && !conf->disable_memfd && pa_memfd_is_locally_supported(),
+                          conf->shm_size))) {
+        pa_log(_("pa_core_new() failed."));
+        goto finish;
+    }
+
+    c->default_sample_spec = conf->default_sample_spec;
+    c->alternate_sample_rate = conf->alternate_sample_rate;
+    c->default_channel_map = conf->default_channel_map;
+    c->default_n_fragments = conf->default_n_fragments;
+    c->default_fragment_size_msec = conf->default_fragment_size_msec;
+    c->deferred_volume_safety_margin_usec = conf->deferred_volume_safety_margin_usec;
+    c->deferred_volume_extra_delay_usec = conf->deferred_volume_extra_delay_usec;
+    c->lfe_crossover_freq = conf->lfe_crossover_freq;
+    c->exit_idle_time = conf->exit_idle_time;
+    c->scache_idle_time = conf->scache_idle_time;
+    c->resample_method = conf->resample_method;
+    c->realtime_priority = conf->realtime_priority;
+    c->realtime_scheduling = conf->realtime_scheduling;
+    c->avoid_resampling = conf->avoid_resampling;
+    c->disable_remixing = conf->disable_remixing;
+    c->remixing_use_all_sink_channels = conf->remixing_use_all_sink_channels;
+    c->remixing_produce_lfe = conf->remixing_produce_lfe;
+    c->remixing_consume_lfe = conf->remixing_consume_lfe;
+    c->deferred_volume = conf->deferred_volume;
+    c->running_as_daemon = conf->daemonize;
+    c->disallow_exit = conf->disallow_exit;
+    c->flat_volumes = conf->flat_volumes;
+    c->rescue_streams = conf->rescue_streams;
+#ifdef HAVE_DBUS
+    c->server_type = conf->local_server_type;
+#endif
+
+    pa_core_check_idle(c);
+
+    c->state = PA_CORE_RUNNING;
+
+    pa_cpu_init(&c->cpu_info);
+
+    pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
+    pa_signal_new(SIGINT, signal_callback, c);
+    pa_signal_new(SIGTERM, signal_callback, c);
+#ifdef SIGUSR1
+    pa_signal_new(SIGUSR1, signal_callback, c);
+#endif
+#ifdef SIGUSR2
+    pa_signal_new(SIGUSR2, signal_callback, c);
+#endif
+#ifdef SIGHUP
+    pa_signal_new(SIGHUP, signal_callback, c);
+#endif
+
+    if (!conf->no_cpu_limit)
+        pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
+
+    buf = pa_strbuf_new();
+
+#ifdef HAVE_DBUS
+    pa_assert_se(dbus_threads_init_default());
+
+    if (start_server)
+#endif
+    {
+        const char *command_source = NULL;
+
+        if (conf->load_default_script_file) {
+            FILE *f;
+
+            if ((f = pa_daemon_conf_open_default_script_file(conf))) {
+                r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
+                fclose(f);
+                command_source = pa_daemon_conf_get_default_script_file(conf);
+            }
+        }
+
+        if (r >= 0) {
+            r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
+            command_source = _("command line arguments");
+        }
+
+        pa_log_error("%s", s = pa_strbuf_to_string_free(buf));
+        pa_xfree(s);
+
+        if (r < 0 && conf->fail) {
+            pa_log(_("Failed to initialize daemon due to errors while executing startup commands. Source of commands: %s"), command_source);
+            goto finish;
+        }
+
+        if (!c->modules || pa_idxset_size(c->modules) == 0) {
+            pa_log(_("Daemon startup without any loaded modules, refusing to work."));
+            goto finish;
+        }
+#ifdef HAVE_DBUS
+    } else {
+        /* When we just provide the D-Bus server lookup service, we don't want
+         * any modules to be loaded. We haven't loaded any so far, so one might
+         * think there's no way to contact the server, but receiving certain
+         * signals could still cause modules to load. */
+        conf->disallow_module_loading = true;
+#endif
+    }
+
+    /* We completed the initial module loading, so let's disable it
+     * from now on, if requested */
+    c->disallow_module_loading = conf->disallow_module_loading;
+
+#ifdef HAVE_DBUS
+    if (!conf->system_instance) {
+        if ((server_lookup = pa_dbusobj_server_lookup_new(c))) {
+            if (!(lookup_service_bus = register_dbus_name(c, DBUS_BUS_SESSION, "org.PulseAudio1")))
+                goto finish;
+        }
+    }
+
+    if (start_server)
+        server_bus = register_dbus_name(c, conf->system_instance ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, "org.pulseaudio.Server");
+#endif
+
+#ifdef HAVE_FORK
+    if (daemon_pipe2[1] >= 0) {
+        int ok = 0;
+        pa_loop_write(daemon_pipe2[1], &ok, sizeof(ok), NULL);
+        pa_close(daemon_pipe2[1]);
+        daemon_pipe2[1] = -1;
+    }
+#endif
+
+    pa_log_info("Daemon startup complete.");
+
+#ifdef HAVE_SYSTEMD_DAEMON
+    sd_notify(0, "READY=1");
+#endif
+
+    retval = 0;
+    if (pa_mainloop_run(mainloop, &retval) < 0)
+        goto finish;
+
+    pa_log_info("Daemon shutdown initiated.");
+
+#ifdef HAVE_SYSTEMD_DAEMON
+    sd_notify(0, "STOPPING=1");
+#endif
+
+finish:
+#ifdef HAVE_DBUS
+    if (server_bus)
+        pa_dbus_connection_unref(server_bus);
+    if (lookup_service_bus)
+        pa_dbus_connection_unref(lookup_service_bus);
+    if (server_lookup)
+        pa_dbusobj_server_lookup_free(server_lookup);
+#endif
+
+    if (autospawn_fd >= 0) {
+        if (autospawn_locked)
+            pa_autospawn_lock_release();
+
+        pa_autospawn_lock_done(false);
+    }
+
+    if (c) {
+        /* Ensure all the modules/samples are unloaded when the core is still ref'ed,
+         * as unlink callback hooks in modules may need the core to be ref'ed */
+        pa_module_unload_all(c);
+        pa_scache_free_all(c);
+
+        pa_core_unref(c);
+        pa_log_info("Daemon terminated.");
+    }
+
+    if (!conf->no_cpu_limit)
+        pa_cpu_limit_done();
+
+    pa_signal_done();
+
+#ifdef HAVE_FORK
+    /* If we have daemon_pipe[1] still open, this means we've failed after
+     * the first fork, but before the second. Therefore just write to it. */
+    if (daemon_pipe[1] >= 0)
+        pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
+    else if (daemon_pipe2[1] >= 0)
+        pa_loop_write(daemon_pipe2[1], &retval, sizeof(retval), NULL);
+
+    pa_close_pipe(daemon_pipe2);
+    pa_close_pipe(daemon_pipe);
+#endif
+
+    if (mainloop)
+        pa_mainloop_free(mainloop);
+
+    if (conf)
+        pa_daemon_conf_free(conf);
+
+    if (valid_pid_file)
+        pa_pid_file_remove();
+
+    /* This has no real purpose except making things valgrind-clean */
+    pa_unset_env_recorded();
+
+#ifdef OS_IS_WIN32
+    WSACleanup();
+#endif
+
+    if (ltdl_init)
+        pa_ltdl_done();
+
+#ifdef HAVE_DBUS
+    dbus_shutdown();
+#endif
+
+    return retval;
+}