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transmission/cli/cli.cc

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// This file Copyright © 2006-2023 Transmission authors and contributors.
// It may be used under the MIT (SPDX: MIT) license.
// License text can be found in the licenses/ folder.
#include <array>
#include <cstdio> /* fprintf () */
#include <cstdlib> /* atoi () */
#include <string>
#include <string_view>
#include <thread>
#include <signal.h>
#include <fmt/core.h>
#include <libtransmission/transmission.h>
#include <libtransmission/error.h>
#include <libtransmission/file.h>
#include <libtransmission/tr-getopt.h>
#include <libtransmission/utils.h> // _()
#include <libtransmission/variant.h>
#include <libtransmission/version.h>
#include <libtransmission/web-utils.h>
#include <libtransmission/web.h> // tr_sessionFetch()
using namespace std::chrono_literals;
/***
****
***/
static auto constexpr MemK = size_t{ 1024 };
static char constexpr MemKStr[] = "KiB";
static char constexpr MemMStr[] = "MiB";
static char constexpr MemGStr[] = "GiB";
static char constexpr MemTStr[] = "TiB";
static auto constexpr DiskK = size_t{ 1000 };
static char constexpr DiskKStr[] = "kB";
static char constexpr DiskMStr[] = "MB";
static char constexpr DiskGStr[] = "GB";
static char constexpr DiskTStr[] = "TB";
static auto constexpr SpeedK = size_t{ 1000 };
#define SPEED_K_STR "kB/s"
static char constexpr SpeedKStr[] = SPEED_K_STR;
static char constexpr SpeedMStr[] = "MB/s";
static char constexpr SpeedGStr[] = "GB/s";
static char constexpr SpeedTStr[] = "TB/s";
/***
****
***/
static auto constexpr LineWidth = int{ 80 };
static char constexpr MyConfigName[] = "transmission";
static char constexpr MyReadableName[] = "transmission-cli";
static char constexpr Usage
[] = "A fast and easy BitTorrent client\n"
"\n"
"Usage: transmission-cli [options] <file|url|magnet>";
static bool showVersion = false;
static bool verify = false;
static sig_atomic_t gotsig = false;
static sig_atomic_t manualUpdate = false;
static char const* torrentPath = nullptr;
static auto constexpr Options = std::array<tr_option, 20>{
{ { 'b', "blocklist", "Enable peer blocklists", "b", false, nullptr },
{ 'B', "no-blocklist", "Disable peer blocklists", "B", false, nullptr },
{ 'd', "downlimit", "Set max download speed in " SPEED_K_STR, "d", true, "<speed>" },
{ 'D', "no-downlimit", "Don't limit the download speed", "D", false, nullptr },
{ 910, "encryption-required", "Encrypt all peer connections", "er", false, nullptr },
{ 911, "encryption-preferred", "Prefer encrypted peer connections", "ep", false, nullptr },
{ 912, "encryption-tolerated", "Prefer unencrypted peer connections", "et", false, nullptr },
{ 'f', "finish", "Run a script when the torrent finishes", "f", true, "<script>" },
{ 'g', "config-dir", "Where to find configuration files", "g", true, "<path>" },
{ 'm', "portmap", "Enable portmapping via NAT-PMP or UPnP", "m", false, nullptr },
{ 'M', "no-portmap", "Disable portmapping", "M", false, nullptr },
{ 'p', "port", "Port for incoming peers (Default: " TR_DEFAULT_PEER_PORT_STR ")", "p", true, "<port>" },
{ 't',
"tos",
"Peer socket DSCP / ToS setting (number, or a DSCP string, e.g. 'af11' or 'cs0', default=" TR_DEFAULT_PEER_SOCKET_TOS_STR
")",
"t",
true,
"<dscp-or-tos>" },
{ 'u', "uplimit", "Set max upload speed in " SPEED_K_STR, "u", true, "<speed>" },
{ 'U', "no-uplimit", "Don't limit the upload speed", "U", false, nullptr },
{ 'v', "verify", "Verify the specified torrent", "v", false, nullptr },
{ 'V', "version", "Show version number and exit", "V", false, nullptr },
{ 'w', "download-dir", "Where to save downloaded data", "w", true, "<path>" },
{ 500, "sequential-download", "Download pieces sequentially", "seq", false, nullptr },
{ 0, nullptr, nullptr, nullptr, false, nullptr } }
};
static int parseCommandLine(tr_variant*, int argc, char const** argv);
static void sigHandler(int signal);
static std::string tr_strlratio(double ratio)
{
if (static_cast<int>(ratio) == TR_RATIO_NA)
{
return _("None");
}
if (static_cast<int>(ratio) == TR_RATIO_INF)
{
return _("Inf");
}
if (ratio < 10.0)
{
return fmt::format(FMT_STRING("{:.2f}"), ratio);
}
if (ratio < 100.0)
{
return fmt::format(FMT_STRING("{:.1f}"), ratio);
}
return fmt::format(FMT_STRING("{:.0f}"), ratio);
}
static bool waitingOnWeb;
static void onTorrentFileDownloaded(tr_web::FetchResponse const& response)
{
auto* ctor = static_cast<tr_ctor*>(response.user_data);
tr_ctorSetMetainfo(ctor, std::data(response.body), std::size(response.body), nullptr);
waitingOnWeb = false;
}
static std::string getStatusStr(tr_stat const* st)
{
if (st->activity == TR_STATUS_CHECK_WAIT)
{
return "Waiting to verify local files";
}
if (st->activity == TR_STATUS_CHECK)
{
return fmt::format(
FMT_STRING("Verifying local files ({:.2f}%, {:.2f}% valid)"),
tr_truncd(100 * st->recheckProgress, 2),
tr_truncd(100 * st->percentDone, 2));
}
if (st->activity == TR_STATUS_DOWNLOAD)
{
return fmt::format(
FMT_STRING("Progress: {:.1f}%, dl from {:d} of {:d} peers ({:s}), ul to {:d} ({:s}) [{:s}]"),
tr_truncd(100 * st->percentDone, 1),
st->peersSendingToUs,
st->peersConnected,
tr_formatter_speed_KBps(st->pieceDownloadSpeed_KBps),
st->peersGettingFromUs,
tr_formatter_speed_KBps(st->pieceUploadSpeed_KBps),
tr_strlratio(st->ratio));
}
if (st->activity == TR_STATUS_SEED)
{
return fmt::format(
FMT_STRING("Seeding, uploading to {:d} of {:d} peer(s), {:s} [{:s}]"),
st->peersGettingFromUs,
st->peersConnected,
tr_formatter_speed_KBps(st->pieceUploadSpeed_KBps),
tr_strlratio(st->ratio));
}
return "";
}
static std::string getConfigDir(int argc, char const** argv)
{
int c;
char const* my_optarg;
int const ind = tr_optind;
while ((c = tr_getopt(Usage, argc, argv, std::data(Options), &my_optarg)) != TR_OPT_DONE)
{
if (c == 'g')
{
return my_optarg;
break;
}
}
tr_optind = ind;
return tr_getDefaultConfigDir(MyConfigName);
}
int tr_main(int argc, char* argv[])
{
auto const init_mgr = tr_lib_init();
tr_locale_set_global("");
tr_formatter_mem_init(MemK, MemKStr, MemMStr, MemGStr, MemTStr);
tr_formatter_size_init(DiskK, DiskKStr, DiskMStr, DiskGStr, DiskTStr);
tr_formatter_speed_init(SpeedK, SpeedKStr, SpeedMStr, SpeedGStr, SpeedTStr);
printf("%s %s\n", MyReadableName, LONG_VERSION_STRING);
/* user needs to pass in at least one argument */
if (argc < 2)
{
tr_getopt_usage(MyReadableName, Usage, std::data(Options));
return EXIT_FAILURE;
}
/* load the defaults from config file + libtransmission defaults */
auto const config_dir = getConfigDir(argc, (char const**)argv);
auto settings = tr_sessionLoadSettings(config_dir.c_str(), MyConfigName);
/* the command line overrides defaults */
if (parseCommandLine(&settings, argc, (char const**)argv) != 0)
{
return EXIT_FAILURE;
}
if (showVersion)
{
return EXIT_SUCCESS;
}
/* Check the options for validity */
if (torrentPath == nullptr)
{
fprintf(stderr, "No torrent specified!\n");
return EXIT_FAILURE;
}
if (auto sv = std::string_view{}; tr_variantDictFindStrView(&settings, TR_KEY_download_dir, &sv))
{
auto const sz_download_dir = std::string{ sv };
if (!tr_sys_path_exists(sz_download_dir))
{
tr_error* error = nullptr;
if (!tr_sys_dir_create(sz_download_dir, TR_SYS_DIR_CREATE_PARENTS, 0700, &error))
{
fprintf(stderr, "Unable to create download directory \"%s\": %s\n", sz_download_dir.c_str(), error->message);
tr_error_free(error);
return EXIT_FAILURE;
}
}
}
auto* const h = tr_sessionInit(config_dir.c_str(), false, &settings);
auto* const ctor = tr_ctorNew(h);
tr_ctorSetPaused(ctor, TR_FORCE, false);
if (tr_sys_path_exists(torrentPath) ? tr_ctorSetMetainfoFromFile(ctor, torrentPath, nullptr) :
tr_ctorSetMetainfoFromMagnetLink(ctor, torrentPath, nullptr))
{
// all good
}
else if (tr_urlIsValid(torrentPath))
{
// fetch it
tr_sessionFetch(h, { torrentPath, onTorrentFileDownloaded, ctor });
waitingOnWeb = true;
while (waitingOnWeb)
{
std::this_thread::sleep_for(1s);
}
}
else
{
fprintf(stderr, "ERROR: Unrecognized torrent \"%s\".\n", torrentPath);
fprintf(stderr, " * If you're trying to create a torrent, use transmission-create.\n");
fprintf(stderr, " * If you're trying to see a torrent's info, use transmission-show.\n");
tr_sessionClose(h);
return EXIT_FAILURE;
}
tr_torrent* tor = tr_torrentNew(ctor, nullptr);
tr_ctorFree(ctor);
if (tor == nullptr)
{
fprintf(stderr, "Failed opening torrent file `%s'\n", torrentPath);
tr_sessionClose(h);
return EXIT_FAILURE;
}
signal(SIGINT, sigHandler);
#ifndef _WIN32
signal(SIGHUP, sigHandler);
#endif
tr_torrentStart(tor);
if (verify)
{
verify = false;
tr_torrentVerify(tor);
}
for (;;)
{
static auto constexpr messageName = std::array<char const*, 4>{
nullptr,
"Tracker gave a warning:",
"Tracker gave an error:",
"Error:",
};
std::this_thread::sleep_for(200ms);
if (gotsig)
{
gotsig = false;
printf("\nStopping torrent...\n");
tr_torrentStop(tor);
}
if (manualUpdate)
{
manualUpdate = false;
if (!tr_torrentCanManualUpdate(tor))
{
fprintf(stderr, "\nReceived SIGHUP, but can't send a manual update now\n");
}
else
{
fprintf(stderr, "\nReceived SIGHUP: manual update scheduled\n");
tr_torrentManualUpdate(tor);
}
}
auto const* const st = tr_torrentStat(tor);
if (st->activity == TR_STATUS_STOPPED)
{
break;
}
auto const status_str = getStatusStr(st);
printf("\r%-*s", TR_ARG_TUPLE(LineWidth, status_str.c_str()));
if (messageName[st->error])
{
fprintf(stderr, "\n%s: %s\n", messageName[st->error], st->errorString);
}
}
tr_sessionSaveSettings(h, config_dir.c_str(), &settings);
printf("\n");
tr_sessionClose(h);
return EXIT_SUCCESS;
}
/***
****
****
***/
static int parseCommandLine(tr_variant* d, int argc, char const** argv)
{
int c;
char const* my_optarg;
while ((c = tr_getopt(Usage, argc, argv, std::data(Options), &my_optarg)) != TR_OPT_DONE)
{
switch (c)
{
case 'b':
tr_variantDictAddBool(d, TR_KEY_blocklist_enabled, true);
break;
case 'B':
tr_variantDictAddBool(d, TR_KEY_blocklist_enabled, false);
break;
case 'd':
tr_variantDictAddInt(d, TR_KEY_speed_limit_down, atoi(my_optarg));
tr_variantDictAddBool(d, TR_KEY_speed_limit_down_enabled, true);
break;
case 'D':
tr_variantDictAddBool(d, TR_KEY_speed_limit_down_enabled, false);
break;
case 'f':
tr_variantDictAddStr(d, TR_KEY_script_torrent_done_filename, my_optarg);
tr_variantDictAddBool(d, TR_KEY_script_torrent_done_enabled, true);
break;
case 'g': /* handled above */
break;
case 'm':
tr_variantDictAddBool(d, TR_KEY_port_forwarding_enabled, true);
break;
case 'M':
tr_variantDictAddBool(d, TR_KEY_port_forwarding_enabled, false);
break;
case 'p':
tr_variantDictAddInt(d, TR_KEY_peer_port, atoi(my_optarg));
break;
case 't':
tr_variantDictAddStr(d, TR_KEY_peer_socket_tos, my_optarg);
break;
case 'u':
tr_variantDictAddInt(d, TR_KEY_speed_limit_up, atoi(my_optarg));
tr_variantDictAddBool(d, TR_KEY_speed_limit_up_enabled, true);
break;
case 'U':
tr_variantDictAddBool(d, TR_KEY_speed_limit_up_enabled, false);
break;
case 'v':
verify = true;
break;
case 'V':
showVersion = true;
break;
case 'w':
tr_variantDictAddStr(d, TR_KEY_download_dir, my_optarg);
break;
case 910:
tr_variantDictAddInt(d, TR_KEY_encryption, TR_ENCRYPTION_REQUIRED);
break;
case 911:
tr_variantDictAddInt(d, TR_KEY_encryption, TR_ENCRYPTION_PREFERRED);
break;
case 912:
tr_variantDictAddInt(d, TR_KEY_encryption, TR_CLEAR_PREFERRED);
break;
case 500:
tr_variantDictAddBool(d, TR_KEY_sequentialDownload, true);
break;
case TR_OPT_UNK:
if (torrentPath == nullptr)
{
torrentPath = my_optarg;
}
break;
default:
return 1;
}
}
return 0;
}
static void sigHandler(int signal)
{
switch (signal)
{
case SIGINT:
gotsig = true;
break;
#ifndef _WIN32
case SIGHUP:
manualUpdate = true;
break;
#endif
default:
break;
}
}
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