#include <stdio.h>

#include <curl/curl.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <getopt.h>

#include "sd-daemon.h"

#include "log.h"

#include "util.h"

#include "build.h"

#include "fileio.h"

#include "mkdir.h"

#include "conf-parser.h"

#include "journal-upload.h"

#define PRIV_KEY_FILE CERTIFICATE_ROOT "/private/journal-upload.pem"

#define CERT_FILE CERTIFICATE_ROOT "/certs/journal-upload.pem"

#define TRUST_FILE CERTIFICATE_ROOT "/ca/trusted.pem"

#define DEFAULT_PORT 19532

static const char* arg_url;

static void close_fd_input(Uploader *u);

static const char *arg_key = NULL;

static const char *arg_cert = NULL;

static const char *arg_trust = NULL;

static const char *arg_directory = NULL;

static char **arg_file = NULL;

static const char *arg_cursor = NULL;

static bool arg_after_cursor = false;

static int arg_journal_type = 0;

static const char *arg_machine = NULL;

static bool arg_merge = false;

static int arg_follow = -1;

static const char *arg_save_state = NULL;

#define SERVER_ANSWER_KEEP 2048

#define STATE_FILE "/var/lib/systemd/journal-upload/state"

#define easy_setopt(curl, opt, value, level, cmd) \

{ \

code = curl_easy_setopt(curl, opt, value); \

if (code) { \

log_full(level, \

"curl_easy_setopt " #opt " failed: %s", \

curl_easy_strerror(code)); \

cmd; \

} \

}

static size_t output_callback(char *buf,

size_t size,

size_t nmemb,

void *userp) {

Uploader *u = userp;

assert(u);

log_debug("The server answers (%zu bytes): %.*s",

size*nmemb, (int)(size*nmemb), buf);

if (nmemb && !u->answer) {

u->answer = strndup(buf, size*nmemb);

if (!u->answer)

log_warning("Failed to store server answer (%zu bytes): %s",

size*nmemb, strerror(ENOMEM));

}

return size * nmemb;

}

static int check_cursor_updating(Uploader *u) {

_cleanup_free_ char *temp_path = NULL;

_cleanup_fclose_ FILE *f = NULL;

int r;

if (!u->state_file)

return 0;

r = mkdir_parents(u->state_file, 0755);

if (r < 0) {

log_error("Cannot create parent directory of state file %s: %s",

u->state_file, strerror(-r));

return r;

}

r = fopen_temporary(u->state_file, &f, &temp_path);

if (r < 0) {

log_error("Cannot save state to %s: %s",

u->state_file, strerror(-r));

return r;

}

unlink(temp_path);

return 0;

}

static int update_cursor_state(Uploader *u) {

_cleanup_free_ char *temp_path = NULL;

_cleanup_fclose_ FILE *f = NULL;

int r;

if (!u->state_file || !u->last_cursor)

return 0;

r = fopen_temporary(u->state_file, &f, &temp_path);

if (r < 0)

goto finish;

fprintf(f,

"# This is private data. Do not parse.\n"

"LAST_CURSOR=%s\n",

u->last_cursor);

fflush(f);

if (ferror(f) || rename(temp_path, u->state_file) < 0) {

r = -errno;

unlink(u->state_file);

unlink(temp_path);

}

finish:

if (r < 0)

log_error("Failed to save state %s: %s", u->state_file, strerror(-r));

return r;

}

static int load_cursor_state(Uploader *u) {

int r;

if (!u->state_file)

return 0;

r = parse_env_file(u->state_file, NEWLINE,

"LAST_CURSOR", &u->last_cursor,

NULL);

if (r < 0 && r != -ENOENT) {

log_error("Failed to read state file %s: %s",

u->state_file, strerror(-r));

return r;

}

return 0;

}

int start_upload(Uploader *u,

size_t (*input_callback)(void *ptr,

size_t size,

size_t nmemb,

void *userdata),

void *data) {

CURLcode code;

assert(u);

assert(input_callback);

if (!u->header) {

struct curl_slist *h;

h = curl_slist_append(NULL, "Content-Type: application/vnd.fdo.journal");

if (!h)

return log_oom();

h = curl_slist_append(h, "Transfer-Encoding: chunked");

if (!h) {

curl_slist_free_all(h);

return log_oom();

}

h = curl_slist_append(h, "Accept: text/plain");

if (!h) {

curl_slist_free_all(h);

return log_oom();

}

u->header = h;

}

if (!u->easy) {

CURL *curl;

curl = curl_easy_init();

if (!curl) {

log_error("Call to curl_easy_init failed.");

return -ENOSR;

}

/* tell it to POST to the URL */

easy_setopt(curl, CURLOPT_POST, 1L,

LOG_ERR, return -EXFULL);

easy_setopt(curl, CURLOPT_ERRORBUFFER, u->error,

LOG_ERR, return -EXFULL);

/* set where to write to */

easy_setopt(curl, CURLOPT_WRITEFUNCTION, output_callback,

LOG_ERR, return -EXFULL);

easy_setopt(curl, CURLOPT_WRITEDATA, data,

LOG_ERR, return -EXFULL);

/* set where to read from */

easy_setopt(curl, CURLOPT_READFUNCTION, input_callback,

LOG_ERR, return -EXFULL);

easy_setopt(curl, CURLOPT_READDATA, data,

LOG_ERR, return -EXFULL);

/* use our special own mime type and chunked transfer */

easy_setopt(curl, CURLOPT_HTTPHEADER, u->header,

LOG_ERR, return -EXFULL);

/* enable verbose for easier tracing */

easy_setopt(curl, CURLOPT_VERBOSE, 1L, LOG_WARNING, );

easy_setopt(curl, CURLOPT_USERAGENT,

"systemd-journal-upload " PACKAGE_STRING,

LOG_WARNING, );

if (arg_key || startswith(u->url, "https://")) {

easy_setopt(curl, CURLOPT_SSLKEY, arg_key ?: PRIV_KEY_FILE,

LOG_ERR, return -EXFULL);

easy_setopt(curl, CURLOPT_SSLCERT, arg_cert ?: CERT_FILE,

LOG_ERR, return -EXFULL);

}

if (arg_trust || startswith(u->url, "https://"))

easy_setopt(curl, CURLOPT_CAINFO, arg_trust ?: TRUST_FILE,

LOG_ERR, return -EXFULL);

if (arg_key || arg_trust)

easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1,

LOG_WARNING, );

u->easy = curl;

} else {

/* truncate the potential old error message */

u->error[0] = '\0';

free(u->answer);

u->answer = 0;

}

/* upload to this place */

code = curl_easy_setopt(u->easy, CURLOPT_URL, u->url);

if (code) {

log_error("curl_easy_setopt CURLOPT_URL failed: %s",

curl_easy_strerror(code));

return -EXFULL;

}

u->uploading = true;

return 0;

}

static size_t fd_input_callback(void *buf, size_t size, size_t nmemb, void *userp) {

Uploader *u = userp;

ssize_t r;

assert(u);

assert(nmemb <= SSIZE_MAX / size);

if (u->input < 0)

return 0;

r = read(u->input, buf, size * nmemb);

log_debug("%s: allowed %zu, read %zu", __func__, size*nmemb, r);

if (r > 0)

return r;

u->uploading = false;

if (r == 0) {

log_debug("Reached EOF");

close_fd_input(u);

return 0;

} else {

log_error("Aborting transfer after read error on input: %m.");

return CURL_READFUNC_ABORT;

}

}

static void close_fd_input(Uploader *u) {

assert(u);

if (u->input >= 0)

close_nointr(u->input);

u->input = -1;

u->timeout = 0;

}

static int dispatch_fd_input(sd_event_source *event,

int fd,

uint32_t revents,

void *userp) {

Uploader *u = userp;

assert(u);

assert(fd >= 0);

if (revents & EPOLLHUP) {

log_debug("Received HUP");

close_fd_input(u);

return 0;

}

if (!(revents & EPOLLIN)) {

log_warning("Unexpected poll event %"PRIu32".", revents);

return -EINVAL;

}

if (u->uploading) {

log_warning("dispatch_fd_input called when uploading, ignoring.");

return 0;

}

return start_upload(u, fd_input_callback, u);

}

static int open_file_for_upload(Uploader *u, const char *filename) {

int fd, r = 0;

if (streq(filename, "-"))

fd = STDIN_FILENO;

else {

fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOCTTY);

if (fd < 0) {

log_error("Failed to open %s: %m", filename);

return -errno;

}

}

u->input = fd;

if (arg_follow) {

r = sd_event_add_io(u->events, &u->input_event,

fd, EPOLLIN, dispatch_fd_input, u);

if (r < 0) {

if (r != -EPERM || arg_follow > 0) {

log_error("Failed to register input event: %s", strerror(-r));

return r;

}

/* Normal files should just be consumed without polling. */

r = start_upload(u, fd_input_callback, u);

}

}

return r;

}

static int dispatch_sigterm(sd_event_source *event,

const struct signalfd_siginfo *si,

void *userdata) {

Uploader *u = userdata;

assert(u);

log_received_signal(LOG_INFO, si);

close_fd_input(u);

close_journal_input(u);

sd_event_exit(u->events, 0);

return 0;

}

static int setup_signals(Uploader *u) {

sigset_t mask;

int r;

assert(u);

assert_se(sigemptyset(&mask) == 0);

sigset_add_many(&mask, SIGINT, SIGTERM, -1);

assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);

r = sd_event_add_signal(u->events, &u->sigterm_event, SIGTERM, dispatch_sigterm, u);

if (r < 0)

return r;

r = sd_event_add_signal(u->events, &u->sigint_event, SIGINT, dispatch_sigterm, u);

if (r < 0)

return r;

return 0;

}

static int setup_uploader(Uploader *u, const char *url, const char *state_file) {

int r;

const char *host, *proto = "";

assert(u);

assert(url);

memzero(u, sizeof(Uploader));

u->input = -1;

if (!(host = startswith(url, "http://")) && !(host = startswith(url, "https://"))) {

host = url;

proto = "https://";

}

if (strchr(host, ':'))

u->url = strjoin(proto, url, "/upload", NULL);

else {

char *t;

size_t x;

t = strdupa(url);

x = strlen(t);

while (x > 0 && t[x - 1] == '/')

t[x - 1] = '\0';

u->url = strjoin(proto, t, ":" STRINGIFY(DEFAULT_PORT), "/upload", NULL);

}

if (!u->url)

return log_oom();

u->state_file = state_file;

r = sd_event_default(&u->events);

if (r < 0) {

log_error("sd_event_default failed: %s", strerror(-r));

return r;

}

r = setup_signals(u);

if (r < 0) {

log_error("Failed to set up signals: %s", strerror(-r));

return r;

}

return load_cursor_state(u);

}

static void destroy_uploader(Uploader *u) {

assert(u);

curl_easy_cleanup(u->easy);

curl_slist_free_all(u->header);

free(u->answer);

free(u->last_cursor);

free(u->current_cursor);

free(u->url);

u->input_event = sd_event_source_unref(u->input_event);

close_fd_input(u);

close_journal_input(u);

sd_event_source_unref(u->sigterm_event);

sd_event_source_unref(u->sigint_event);

sd_event_unref(u->events);

}

static int perform_upload(Uploader *u) {

CURLcode code;

long status;

assert(u);

code = curl_easy_perform(u->easy);

if (code) {

if (u->error[0])

log_error("Upload to %s failed: %.*s",

u->url, (int) sizeof(u->error), u->error);

else

log_error("Upload to %s failed: %s",

u->url, curl_easy_strerror(code));

return -EIO;

}

code = curl_easy_getinfo(u->easy, CURLINFO_RESPONSE_CODE, &status);

if (code) {

log_error("Failed to retrieve response code: %s",

curl_easy_strerror(code));

return -EUCLEAN;

}

if (status >= 300) {

log_error("Upload to %s failed with code %lu: %s",

u->url, status, strna(u->answer));

return -EIO;

} else if (status < 200) {

log_error("Upload to %s finished with unexpected code %lu: %s",

u->url, status, strna(u->answer));

return -EIO;

} else

log_debug("Upload finished successfully with code %lu: %s",

status, strna(u->answer));

free(u->last_cursor);

u->last_cursor = u->current_cursor;

u->current_cursor = NULL;

return update_cursor_state(u);

}

static int parse_config(void) {

const ConfigTableItem items[] = {

{ "Upload", "URL", config_parse_string, 0, &arg_url },

{ "Upload", "ServerKeyFile", config_parse_path, 0, &arg_key },

{ "Upload", "ServerCertificateFile", config_parse_path, 0, &arg_cert },

{ "Upload", "TrustedCertificateFile", config_parse_path, 0, &arg_trust },

{}};

return config_parse(NULL, PKGSYSCONFDIR "/journal-upload.conf", NULL,

"Upload\0",

config_item_table_lookup, items,

false, false, true, NULL);

}

static void help(void) {

printf("%s -u URL {FILE|-}...\n\n"

"Upload journal events to a remote server.\n\n"

" -h --help Show this help\n"

" --version Show package version\n"

" -u --url=URL Upload to this address (default port "

STRINGIFY(DEFAULT_PORT) ")\n"

" --key=FILENAME Specify key in PEM format (default:\n"

" \"" PRIV_KEY_FILE "\")\n"

" --cert=FILENAME Specify certificate in PEM format (default:\n"

" \"" CERT_FILE "\")\n"

" --trust=FILENAME|all Specify CA certificate or disable checking (default:\n"

" \"" TRUST_FILE "\")\n"

" --system Use the system journal\n"

" --user Use the user journal for the current user\n"

" -m --merge Use all available journals\n"

" -M --machine=CONTAINER Operate on local container\n"

" -D --directory=PATH Use journal files from directory\n"

" --file=PATH Use this journal file\n"

" --cursor=CURSOR Start at the specified cursor\n"

" --after-cursor=CURSOR Start after the specified cursor\n"

" --follow[=BOOL] Do [not] wait for input\n"

" --save-state[=FILE] Save uploaded cursors (default \n"

" " STATE_FILE ")\n"

" -h --help Show this help and exit\n"

" --version Print version string and exit\n"

, program_invocation_short_name);

}

static int parse_argv(int argc, char *argv[]) {

enum {

ARG_VERSION = 0x100,

ARG_KEY,

ARG_CERT,

ARG_TRUST,

ARG_USER,

ARG_SYSTEM,

ARG_FILE,

ARG_CURSOR,

ARG_AFTER_CURSOR,

ARG_FOLLOW,

ARG_SAVE_STATE,

};

static const struct option options[] = {

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, ARG_VERSION },

{ "url", required_argument, NULL, 'u' },

{ "key", required_argument, NULL, ARG_KEY },

{ "cert", required_argument, NULL, ARG_CERT },

{ "trust", required_argument, NULL, ARG_TRUST },

{ "system", no_argument, NULL, ARG_SYSTEM },

{ "user", no_argument, NULL, ARG_USER },

{ "merge", no_argument, NULL, 'm' },

{ "machine", required_argument, NULL, 'M' },

{ "directory", required_argument, NULL, 'D' },

{ "file", required_argument, NULL, ARG_FILE },

{ "cursor", required_argument, NULL, ARG_CURSOR },

{ "after-cursor", required_argument, NULL, ARG_AFTER_CURSOR },

{ "follow", optional_argument, NULL, ARG_FOLLOW },

{ "save-state", optional_argument, NULL, ARG_SAVE_STATE },

{}

};

int c, r;

assert(argc >= 0);

assert(argv);

opterr = 0;

while ((c = getopt_long(argc, argv, "hu:mM:D:", options, NULL)) >= 0)

switch(c) {

case 'h':

help();

return 0 /* done */;

case ARG_VERSION:

puts(PACKAGE_STRING);

puts(SYSTEMD_FEATURES);

return 0 /* done */;

case 'u':

if (arg_url) {

log_error("cannot use more than one --url");

return -EINVAL;

}

arg_url = optarg;

break;

case ARG_KEY:

if (arg_key) {

log_error("cannot use more than one --key");

return -EINVAL;

}

arg_key = optarg;

break;

case ARG_CERT:

if (arg_cert) {

log_error("cannot use more than one --cert");

return -EINVAL;

}

arg_cert = optarg;

break;

case ARG_TRUST:

if (arg_trust) {

log_error("cannot use more than one --trust");

return -EINVAL;

}

arg_trust = optarg;

break;

case ARG_SYSTEM:

arg_journal_type |= SD_JOURNAL_SYSTEM;

break;

case ARG_USER:

arg_journal_type |= SD_JOURNAL_CURRENT_USER;

break;

case 'm':

arg_merge = true;

break;

case 'M':

if (arg_machine) {

log_error("cannot use more than one --machine/-M");

return -EINVAL;

}

arg_machine = optarg;

break;

case 'D':

if (arg_directory) {

log_error("cannot use more than one --directory/-D");

return -EINVAL;

}

arg_directory = optarg;

break;

case ARG_FILE:

r = glob_extend(&arg_file, optarg);

if (r < 0) {

log_error("Failed to add paths: %s", strerror(-r));

return r;

};

break;

case ARG_CURSOR:

if (arg_cursor) {

log_error("cannot use more than one --cursor/--after-cursor");

return -EINVAL;

}

arg_cursor = optarg;

break;

case ARG_AFTER_CURSOR:

if (arg_cursor) {

log_error("cannot use more than one --cursor/--after-cursor");

return -EINVAL;

}

arg_cursor = optarg;

arg_after_cursor = true;

break;

case ARG_FOLLOW:

if (optarg) {

r = parse_boolean(optarg);

if (r < 0) {

log_error("Failed to parse --follow= parameter.");

return -EINVAL;

}

arg_follow = !!r;

} else

arg_follow = true;

break;

case ARG_SAVE_STATE:

arg_save_state = optarg ?: STATE_FILE;

break;

case '?':

log_error("Unknown option %s.", argv[optind-1]);

return -EINVAL;

case ':':

log_error("Missing argument to %s.", argv[optind-1]);

return -EINVAL;

default:

assert_not_reached("Unhandled option code.");

}

if (!arg_url) {

log_error("Required --url/-u option missing.");

return -EINVAL;

}

if (!!arg_key != !!arg_cert) {

log_error("Options --key and --cert must be used together.");

return -EINVAL;

}

if (optind < argc && (arg_directory || arg_file || arg_machine || arg_journal_type)) {

log_error("Input arguments make no sense with journal input.");

return -EINVAL;

}

return 1;

}

static int open_journal(sd_journal **j) {

int r;

if (arg_directory)

r = sd_journal_open_directory(j, arg_directory, arg_journal_type);

else if (arg_file)

r = sd_journal_open_files(j, (const char**) arg_file, 0);

else if (arg_machine)

r = sd_journal_open_container(j, arg_machine, 0);

else

r = sd_journal_open(j, !arg_merge*SD_JOURNAL_LOCAL_ONLY + arg_journal_type);

if (r < 0)

log_error("Failed to open %s: %s",

arg_directory ? arg_directory : arg_file ? "files" : "journal",

strerror(-r));

return r;

}

int main(int argc, char **argv) {

Uploader u;

int r;

bool use_journal;

log_show_color(true);

log_parse_environment();

r = parse_config();

if (r < 0)

goto finish;

r = parse_argv(argc, argv);

if (r <= 0)

goto finish;

r = setup_uploader(&u, arg_url, arg_save_state);

if (r < 0)

goto cleanup;

sd_event_set_watchdog(u.events, true);

r = check_cursor_updating(&u);

if (r < 0)

goto cleanup;

log_debug("%s running as pid "PID_FMT,

program_invocation_short_name, getpid());

use_journal = optind >= argc;

if (use_journal) {

sd_journal *j;

r = open_journal(&j);

if (r < 0)

goto finish;

r = open_journal_for_upload(&u, j,

arg_cursor ?: u.last_cursor,

arg_cursor ? arg_after_cursor : true,

!!arg_follow);

if (r < 0)

goto finish;

}

sd_notify(false,

"READY=1\n"

"STATUS=Processing input...");

while (true) {

if (use_journal) {

if (!u.journal)

break;

r = check_journal_input(&u);

} else if (u.input < 0 && !use_journal) {

if (optind >= argc)

break;

log_debug("Using %s as input.", argv[optind]);

r = open_file_for_upload(&u, argv[optind++]);

}

if (r < 0)

goto cleanup;

r = sd_event_get_state(u.events);

if (r < 0)

break;

if (r == SD_EVENT_FINISHED)

break;

if (u.uploading) {

r = perform_upload(&u);

if (r < 0)

break;

}

r = sd_event_run(u.events, u.timeout);

if (r < 0) {

log_error("Failed to run event loop: %s", strerror(-r));

break;

}

}

cleanup:

sd_notify(false,

"STOPPING=1\n"

"STATUS=Shutting down...");

destroy_uploader(&u);

finish:

return r == 0 ? EXIT_SUCCESS : EXIT_FAILURE;

}