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journal-remote.c
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journal-remote.c
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Zbigniew Jędrzejewski-Szmek
systemd 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.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/socket.h>
#include <unistd.h>
#ifdef HAVE_GNUTLS
#include <gnutls/gnutls.h>
#endif
#include "sd-daemon.h"
#include "alloc-util.h"
#include "conf-parser.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
#include "journal-file.h"
#include "journal-remote-write.h"
#include "journal-remote.h"
#include "journald-native.h"
#include "macro.h"
#include "parse-util.h"
#include "signal-util.h"
#include "socket-util.h"
#include "stat-util.h"
#include "stdio-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#define REMOTE_JOURNAL_PATH "/var/log/journal/remote"
#define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-remote.pem"
#define CERT_FILE CERTIFICATE_ROOT "/certs/journal-remote.pem"
#define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem"
static char* arg_url = NULL;
static char* arg_getter = NULL;
static char* arg_listen_raw = NULL;
static char* arg_listen_http = NULL;
static char* arg_listen_https = NULL;
static char** arg_files = NULL;
static int arg_compress = true;
static int arg_seal = false;
static int http_socket = -1, https_socket = -1;
static char** arg_gnutls_log = NULL;
static JournalWriteSplitMode arg_split_mode = JOURNAL_WRITE_SPLIT_HOST;
static char* arg_output = NULL;
static char *arg_key = NULL;
static char *arg_cert = NULL;
static char *arg_trust = NULL;
static bool arg_trust_all = false;
/**********************************************************************
**********************************************************************
**********************************************************************/
static int spawn_child(const char* child, char** argv) {
int fd[2];
pid_t parent_pid, child_pid;
int r;
if (pipe(fd) < 0)
return log_error_errno(errno, "Failed to create pager pipe: %m");
parent_pid = getpid();
child_pid = fork();
if (child_pid < 0) {
r = log_error_errno(errno, "Failed to fork: %m");
safe_close_pair(fd);
return r;
}
/* In the child */
if (child_pid == 0) {
(void) reset_all_signal_handlers();
(void) reset_signal_mask();
r = dup2(fd[1], STDOUT_FILENO);
if (r < 0) {
log_error_errno(errno, "Failed to dup pipe to stdout: %m");
_exit(EXIT_FAILURE);
}
safe_close_pair(fd);
/* Make sure the child goes away when the parent dies */
if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
_exit(EXIT_FAILURE);
/* Check whether our parent died before we were able
* to set the death signal */
if (getppid() != parent_pid)
_exit(EXIT_SUCCESS);
execvp(child, argv);
log_error_errno(errno, "Failed to exec child %s: %m", child);
_exit(EXIT_FAILURE);
}
r = close(fd[1]);
if (r < 0)
log_warning_errno(errno, "Failed to close write end of pipe: %m");
return fd[0];
}
static int spawn_curl(const char* url) {
char **argv = STRV_MAKE("curl",
"-HAccept: application/vnd.fdo.journal",
"--silent",
"--show-error",
url);
int r;
r = spawn_child("curl", argv);
if (r < 0)
log_error_errno(errno, "Failed to spawn curl: %m");
return r;
}
static int spawn_getter(const char *getter, const char *url) {
int r;
_cleanup_strv_free_ char **words = NULL;
assert(getter);
r = strv_split_extract(&words, getter, WHITESPACE, EXTRACT_QUOTES);
if (r < 0)
return log_error_errno(r, "Failed to split getter option: %m");
r = strv_extend(&words, url);
if (r < 0)
return log_error_errno(r, "Failed to create command line: %m");
r = spawn_child(words[0], words);
if (r < 0)
log_error_errno(errno, "Failed to spawn getter %s: %m", getter);
return r;
}
#define filename_escape(s) xescape((s), "/ ")
static int open_output(Writer *w, const char* host) {
_cleanup_free_ char *_output = NULL;
const char *output;
int r;
switch (arg_split_mode) {
case JOURNAL_WRITE_SPLIT_NONE:
output = arg_output ?: REMOTE_JOURNAL_PATH "/remote.journal";
break;
case JOURNAL_WRITE_SPLIT_HOST: {
_cleanup_free_ char *name;
assert(host);
name = filename_escape(host);
if (!name)
return log_oom();
r = asprintf(&_output, "%s/remote-%s.journal",
arg_output ?: REMOTE_JOURNAL_PATH,
name);
if (r < 0)
return log_oom();
output = _output;
break;
}
default:
assert_not_reached("what?");
}
r = journal_file_open_reliably(output,
O_RDWR|O_CREAT, 0640,
arg_compress, arg_seal,
&w->metrics,
w->mmap,
NULL, &w->journal);
if (r < 0)
log_error_errno(r, "Failed to open output journal %s: %m",
output);
else
log_debug("Opened output file %s", w->journal->path);
return r;
}
/**********************************************************************
**********************************************************************
**********************************************************************/
static int init_writer_hashmap(RemoteServer *s) {
static const struct hash_ops *hash_ops[] = {
[JOURNAL_WRITE_SPLIT_NONE] = NULL,
[JOURNAL_WRITE_SPLIT_HOST] = &string_hash_ops,
};
assert(arg_split_mode >= 0 && arg_split_mode < (int) ELEMENTSOF(hash_ops));
s->writers = hashmap_new(hash_ops[arg_split_mode]);
if (!s->writers)
return log_oom();
return 0;
}
static int get_writer(RemoteServer *s, const char *host,
Writer **writer) {
const void *key;
_cleanup_writer_unref_ Writer *w = NULL;
int r;
switch(arg_split_mode) {
case JOURNAL_WRITE_SPLIT_NONE:
key = "one and only";
break;
case JOURNAL_WRITE_SPLIT_HOST:
assert(host);
key = host;
break;
default:
assert_not_reached("what split mode?");
}
w = hashmap_get(s->writers, key);
if (w)
writer_ref(w);
else {
w = writer_new(s);
if (!w)
return log_oom();
if (arg_split_mode == JOURNAL_WRITE_SPLIT_HOST) {
w->hashmap_key = strdup(key);
if (!w->hashmap_key)
return log_oom();
}
r = open_output(w, host);
if (r < 0)
return r;
r = hashmap_put(s->writers, w->hashmap_key ?: key, w);
if (r < 0)
return r;
}
*writer = w;
w = NULL;
return 0;
}
/**********************************************************************
**********************************************************************
**********************************************************************/
/* This should go away as soon as µhttpd allows state to be passed around. */
static RemoteServer *server;
static int dispatch_raw_source_event(sd_event_source *event,
int fd,
uint32_t revents,
void *userdata);
static int dispatch_raw_source_until_block(sd_event_source *event,
void *userdata);
static int dispatch_blocking_source_event(sd_event_source *event,
void *userdata);
static int dispatch_raw_connection_event(sd_event_source *event,
int fd,
uint32_t revents,
void *userdata);
static int dispatch_http_event(sd_event_source *event,
int fd,
uint32_t revents,
void *userdata);
static int get_source_for_fd(RemoteServer *s,
int fd, char *name, RemoteSource **source) {
Writer *writer;
int r;
/* This takes ownership of name, but only on success. */
assert(fd >= 0);
assert(source);
if (!GREEDY_REALLOC0(s->sources, s->sources_size, fd + 1))
return log_oom();
r = get_writer(s, name, &writer);
if (r < 0)
return log_warning_errno(r, "Failed to get writer for source %s: %m",
name);
if (s->sources[fd] == NULL) {
s->sources[fd] = source_new(fd, false, name, writer);
if (!s->sources[fd]) {
writer_unref(writer);
return log_oom();
}
s->active++;
}
*source = s->sources[fd];
return 0;
}
static int remove_source(RemoteServer *s, int fd) {
RemoteSource *source;
assert(s);
assert(fd >= 0 && fd < (ssize_t) s->sources_size);
source = s->sources[fd];
if (source) {
/* this closes fd too */
source_free(source);
s->sources[fd] = NULL;
s->active--;
}
return 0;
}
static int add_source(RemoteServer *s, int fd, char* name, bool own_name) {
RemoteSource *source = NULL;
int r;
/* This takes ownership of name, even on failure, if own_name is true. */
assert(s);
assert(fd >= 0);
assert(name);
if (!own_name) {
name = strdup(name);
if (!name)
return log_oom();
}
r = get_source_for_fd(s, fd, name, &source);
if (r < 0) {
log_error_errno(r, "Failed to create source for fd:%d (%s): %m",
fd, name);
free(name);
return r;
}
r = sd_event_add_io(s->events, &source->event,
fd, EPOLLIN|EPOLLRDHUP|EPOLLPRI,
dispatch_raw_source_event, source);
if (r == 0) {
/* Add additional source for buffer processing. It will be
* enabled later. */
r = sd_event_add_defer(s->events, &source->buffer_event,
dispatch_raw_source_until_block, source);
if (r == 0)
sd_event_source_set_enabled(source->buffer_event, SD_EVENT_OFF);
} else if (r == -EPERM) {
log_debug("Falling back to sd_event_add_defer for fd:%d (%s)", fd, name);
r = sd_event_add_defer(s->events, &source->event,
dispatch_blocking_source_event, source);
if (r == 0)
sd_event_source_set_enabled(source->event, SD_EVENT_ON);
}
if (r < 0) {
log_error_errno(r, "Failed to register event source for fd:%d: %m",
fd);
goto error;
}
r = sd_event_source_set_description(source->event, name);
if (r < 0) {
log_error_errno(r, "Failed to set source name for fd:%d: %m", fd);
goto error;
}
return 1; /* work to do */
error:
remove_source(s, fd);
return r;
}
static int add_raw_socket(RemoteServer *s, int fd) {
int r;
_cleanup_close_ int fd_ = fd;
char name[sizeof("raw-socket-")-1 + DECIMAL_STR_MAX(int) + 1];
assert(fd >= 0);
r = sd_event_add_io(s->events, &s->listen_event,
fd, EPOLLIN,
dispatch_raw_connection_event, s);
if (r < 0)
return r;
xsprintf(name, "raw-socket-%d", fd);
r = sd_event_source_set_description(s->listen_event, name);
if (r < 0)
return r;
fd_ = -1;
s->active ++;
return 0;
}
static int setup_raw_socket(RemoteServer *s, const char *address) {
int fd;
fd = make_socket_fd(LOG_INFO, address, SOCK_STREAM | SOCK_CLOEXEC);
if (fd < 0)
return fd;
return add_raw_socket(s, fd);
}
/**********************************************************************
**********************************************************************
**********************************************************************/
static int request_meta(void **connection_cls, int fd, char *hostname) {
RemoteSource *source;
Writer *writer;
int r;
assert(connection_cls);
if (*connection_cls)
return 0;
r = get_writer(server, hostname, &writer);
if (r < 0)
return log_warning_errno(r, "Failed to get writer for source %s: %m",
hostname);
source = source_new(fd, true, hostname, writer);
if (!source) {
writer_unref(writer);
return log_oom();
}
log_debug("Added RemoteSource as connection metadata %p", source);
*connection_cls = source;
return 0;
}
static void request_meta_free(void *cls,
struct MHD_Connection *connection,
void **connection_cls,
enum MHD_RequestTerminationCode toe) {
RemoteSource *s;
assert(connection_cls);
s = *connection_cls;
if (s) {
log_debug("Cleaning up connection metadata %p", s);
source_free(s);
*connection_cls = NULL;
}
}
static int process_http_upload(
struct MHD_Connection *connection,
const char *upload_data,
size_t *upload_data_size,
RemoteSource *source) {
bool finished = false;
size_t remaining;
int r;
assert(source);
log_trace("%s: connection %p, %zu bytes",
__func__, connection, *upload_data_size);
if (*upload_data_size) {
log_trace("Received %zu bytes", *upload_data_size);
r = push_data(source, upload_data, *upload_data_size);
if (r < 0)
return mhd_respond_oom(connection);
*upload_data_size = 0;
} else
finished = true;
for (;;) {
r = process_source(source, arg_compress, arg_seal);
if (r == -EAGAIN)
break;
else if (r < 0) {
log_warning("Failed to process data for connection %p", connection);
if (r == -E2BIG)
return mhd_respondf(connection,
MHD_HTTP_REQUEST_ENTITY_TOO_LARGE,
"Entry is too large, maximum is %u bytes.\n",
DATA_SIZE_MAX);
else
return mhd_respondf(connection,
MHD_HTTP_UNPROCESSABLE_ENTITY,
"Processing failed: %s.", strerror(-r));
}
}
if (!finished)
return MHD_YES;
/* The upload is finished */
remaining = source_non_empty(source);
if (remaining > 0) {
log_warning("Premature EOFbyte. %zu bytes lost.", remaining);
return mhd_respondf(connection, MHD_HTTP_EXPECTATION_FAILED,
"Premature EOF. %zu bytes of trailing data not processed.",
remaining);
}
return mhd_respond(connection, MHD_HTTP_ACCEPTED, "OK.\n");
};
static int request_handler(
void *cls,
struct MHD_Connection *connection,
const char *url,
const char *method,
const char *version,
const char *upload_data,
size_t *upload_data_size,
void **connection_cls) {
const char *header;
int r, code, fd;
_cleanup_free_ char *hostname = NULL;
assert(connection);
assert(connection_cls);
assert(url);
assert(method);
log_trace("Handling a connection %s %s %s", method, url, version);
if (*connection_cls)
return process_http_upload(connection,
upload_data, upload_data_size,
*connection_cls);
if (!streq(method, "POST"))
return mhd_respond(connection, MHD_HTTP_METHOD_NOT_ACCEPTABLE,
"Unsupported method.\n");
if (!streq(url, "/upload"))
return mhd_respond(connection, MHD_HTTP_NOT_FOUND,
"Not found.\n");
header = MHD_lookup_connection_value(connection,
MHD_HEADER_KIND, "Content-Type");
if (!header || !streq(header, "application/vnd.fdo.journal"))
return mhd_respond(connection, MHD_HTTP_UNSUPPORTED_MEDIA_TYPE,
"Content-Type: application/vnd.fdo.journal"
" is required.\n");
{
const union MHD_ConnectionInfo *ci;
ci = MHD_get_connection_info(connection,
MHD_CONNECTION_INFO_CONNECTION_FD);
if (!ci) {
log_error("MHD_get_connection_info failed: cannot get remote fd");
return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
"Cannot check remote address");
}
fd = ci->connect_fd;
assert(fd >= 0);
}
if (server->check_trust) {
r = check_permissions(connection, &code, &hostname);
if (r < 0)
return code;
} else {
r = getnameinfo_pretty(fd, &hostname);
if (r < 0)
return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
"Cannot check remote hostname");
}
assert(hostname);
r = request_meta(connection_cls, fd, hostname);
if (r == -ENOMEM)
return respond_oom(connection);
else if (r < 0)
return mhd_respond(connection, MHD_HTTP_INTERNAL_SERVER_ERROR,
strerror(-r));
hostname = NULL;
return MHD_YES;
}
static int setup_microhttpd_server(RemoteServer *s,
int fd,
const char *key,
const char *cert,
const char *trust) {
struct MHD_OptionItem opts[] = {
{ MHD_OPTION_NOTIFY_COMPLETED, (intptr_t) request_meta_free},
{ MHD_OPTION_EXTERNAL_LOGGER, (intptr_t) microhttpd_logger},
{ MHD_OPTION_LISTEN_SOCKET, fd},
{ MHD_OPTION_CONNECTION_MEMORY_LIMIT, DATA_SIZE_MAX},
{ MHD_OPTION_END},
{ MHD_OPTION_END},
{ MHD_OPTION_END},
{ MHD_OPTION_END}};
int opts_pos = 4;
int flags =
MHD_USE_DEBUG |
MHD_USE_DUAL_STACK |
MHD_USE_EPOLL_LINUX_ONLY |
MHD_USE_PEDANTIC_CHECKS |
MHD_USE_PIPE_FOR_SHUTDOWN;
const union MHD_DaemonInfo *info;
int r, epoll_fd;
MHDDaemonWrapper *d;
assert(fd >= 0);
r = fd_nonblock(fd, true);
if (r < 0)
return log_error_errno(r, "Failed to make fd:%d nonblocking: %m", fd);
if (key) {
assert(cert);
opts[opts_pos++] = (struct MHD_OptionItem)
{MHD_OPTION_HTTPS_MEM_KEY, 0, (char*) key};
opts[opts_pos++] = (struct MHD_OptionItem)
{MHD_OPTION_HTTPS_MEM_CERT, 0, (char*) cert};
flags |= MHD_USE_SSL;
if (trust)
opts[opts_pos++] = (struct MHD_OptionItem)
{MHD_OPTION_HTTPS_MEM_TRUST, 0, (char*) trust};
}
d = new(MHDDaemonWrapper, 1);
if (!d)
return log_oom();
d->fd = (uint64_t) fd;
d->daemon = MHD_start_daemon(flags, 0,
NULL, NULL,
request_handler, NULL,
MHD_OPTION_ARRAY, opts,
MHD_OPTION_END);
if (!d->daemon) {
log_error("Failed to start µhttp daemon");
r = -EINVAL;
goto error;
}
log_debug("Started MHD %s daemon on fd:%d (wrapper @ %p)",
key ? "HTTPS" : "HTTP", fd, d);
info = MHD_get_daemon_info(d->daemon, MHD_DAEMON_INFO_EPOLL_FD_LINUX_ONLY);
if (!info) {
log_error("µhttp returned NULL daemon info");
r = -EOPNOTSUPP;
goto error;
}
epoll_fd = info->listen_fd;
if (epoll_fd < 0) {
log_error("µhttp epoll fd is invalid");
r = -EUCLEAN;
goto error;
}
r = sd_event_add_io(s->events, &d->event,
epoll_fd, EPOLLIN,
dispatch_http_event, d);
if (r < 0) {
log_error_errno(r, "Failed to add event callback: %m");
goto error;
}
r = sd_event_source_set_description(d->event, "epoll-fd");
if (r < 0) {
log_error_errno(r, "Failed to set source name: %m");
goto error;
}
r = hashmap_ensure_allocated(&s->daemons, &uint64_hash_ops);
if (r < 0) {
log_oom();
goto error;
}
r = hashmap_put(s->daemons, &d->fd, d);
if (r < 0) {
log_error_errno(r, "Failed to add daemon to hashmap: %m");
goto error;
}
s->active ++;
return 0;
error:
MHD_stop_daemon(d->daemon);
free(d->daemon);
free(d);
return r;
}
static int setup_microhttpd_socket(RemoteServer *s,
const char *address,
const char *key,
const char *cert,
const char *trust) {
int fd;
fd = make_socket_fd(LOG_DEBUG, address, SOCK_STREAM | SOCK_CLOEXEC);
if (fd < 0)
return fd;
return setup_microhttpd_server(s, fd, key, cert, trust);
}
static int dispatch_http_event(sd_event_source *event,
int fd,
uint32_t revents,
void *userdata) {
MHDDaemonWrapper *d = userdata;
int r;
assert(d);
r = MHD_run(d->daemon);
if (r == MHD_NO) {
log_error("MHD_run failed!");
// XXX: unregister daemon
return -EINVAL;
}
return 1; /* work to do */
}
/**********************************************************************
**********************************************************************
**********************************************************************/
static int setup_signals(RemoteServer *s) {
int r;
assert(s);
assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0);
r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s);
if (r < 0)
return r;
r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s);
if (r < 0)
return r;
return 0;
}
static int negative_fd(const char *spec) {
/* Return a non-positive number as its inverse, -EINVAL otherwise. */
int fd, r;
r = safe_atoi(spec, &fd);
if (r < 0)
return r;
if (fd > 0)
return -EINVAL;
else
return -fd;
}
static int remoteserver_init(RemoteServer *s,
const char* key,
const char* cert,
const char* trust) {
int r, n, fd;
char **file;
assert(s);
if ((arg_listen_raw || arg_listen_http) && trust) {
log_error("Option --trust makes all non-HTTPS connections untrusted.");
return -EINVAL;
}
r = sd_event_default(&s->events);
if (r < 0)
return log_error_errno(r, "Failed to allocate event loop: %m");
setup_signals(s);
assert(server == NULL);
server = s;
r = init_writer_hashmap(s);
if (r < 0)
return r;
n = sd_listen_fds(true);
if (n < 0)
return log_error_errno(n, "Failed to read listening file descriptors from environment: %m");
else
log_debug("Received %d descriptors", n);
if (MAX(http_socket, https_socket) >= SD_LISTEN_FDS_START + n) {
log_error("Received fewer sockets than expected");
return -EBADFD;
}
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
if (sd_is_socket(fd, AF_UNSPEC, 0, true)) {
log_debug("Received a listening socket (fd:%d)", fd);
if (fd == http_socket)
r = setup_microhttpd_server(s, fd, NULL, NULL, NULL);
else if (fd == https_socket)
r = setup_microhttpd_server(s, fd, key, cert, trust);
else
r = add_raw_socket(s, fd);
} else if (sd_is_socket(fd, AF_UNSPEC, 0, false)) {
char *hostname;
r = getnameinfo_pretty(fd, &hostname);
if (r < 0)
return log_error_errno(r, "Failed to retrieve remote name: %m");
log_debug("Received a connection socket (fd:%d) from %s", fd, hostname);
r = add_source(s, fd, hostname, true);
} else {
log_error("Unknown socket passed on fd:%d", fd);
return -EINVAL;
}
if (r < 0)
return log_error_errno(r, "Failed to register socket (fd:%d): %m",
fd);
}
if (arg_url) {
const char *url, *hostname;
url = strjoina(arg_url, "/entries");
if (arg_getter) {
log_info("Spawning getter %s...", url);
fd = spawn_getter(arg_getter, url);
} else {
log_info("Spawning curl %s...", url);
fd = spawn_curl(url);
}
if (fd < 0)
return fd;
hostname =
startswith(arg_url, "https://") ?:
startswith(arg_url, "http://") ?:
arg_url;
r = add_source(s, fd, (char*) hostname, false);
if (r < 0)
return r;
}
if (arg_listen_raw) {
log_debug("Listening on a socket...");
r = setup_raw_socket(s, arg_listen_raw);
if (r < 0)
return r;
}
if (arg_listen_http) {
r = setup_microhttpd_socket(s, arg_listen_http, NULL, NULL, NULL);
if (r < 0)
return r;
}
if (arg_listen_https) {
r = setup_microhttpd_socket(s, arg_listen_https, key, cert, trust);
if (r < 0)
return r;
}
STRV_FOREACH(file, arg_files) {
const char *output_name;
if (streq(*file, "-")) {
log_debug("Using standard input as source.");
fd = STDIN_FILENO;
output_name = "stdin";
} else {
log_debug("Reading file %s...", *file);
fd = open(*file, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
if (fd < 0)
return log_error_errno(errno, "Failed to open %s: %m", *file);
output_name = *file;
}
r = add_source(s, fd, (char*) output_name, false);
if (r < 0)
return r;
}
if (s->active == 0) {
log_error("Zero sources specified");
return -EINVAL;
}
if (arg_split_mode == JOURNAL_WRITE_SPLIT_NONE) {
/* In this case we know what the writer will be
called, so we can create it and verify that we can
create output as expected. */
r = get_writer(s, NULL, &s->_single_writer);
if (r < 0)
return r;
}
return 0;
}
static void server_destroy(RemoteServer *s) {
size_t i;
MHDDaemonWrapper *d;
while ((d = hashmap_steal_first(s->daemons))) {
MHD_stop_daemon(d->daemon);
sd_event_source_unref(d->event);
free(d);
}
hashmap_free(s->daemons);
assert(s->sources_size == 0 || s->sources);
for (i = 0; i < s->sources_size; i++)
remove_source(s, i);
free(s->sources);
writer_unref(s->_single_writer);
hashmap_free(s->writers);