void arcan_event_blacklist(const char* idstr)
{
/* idstr comes from a trusted context, won't exceed stack size */
char buf[strlen(idstr) + sizeof("bl_")];
snprintf(buf, COUNT_OF(buf), "bl_%s", idstr);
arcan_db_appl_kv(dbhandle, ARCAN_TBL, "bl_", "block");
}
int main(int argc, char* argv[])
{
settings.in_monitor = getenv("ARCAN_MONITOR_FD") != NULL;
bool windowed = false;
bool fullscreen = false;
bool conservative = false;
bool nosound = false;
unsigned char debuglevel = 0;
int scalemode = ARCAN_VIMAGE_NOPOW2;
int width = -1;
int height = -1;
/* only used when monitor mode is activated, where we want some
* of the global paths etc. accessible, but not *all* of them */
char* monitor_arg = "LOG";
/*
* if we crash in the Lua VM, switch to this app and have it
* adopt our external connections
*/
char* fallback = NULL;
char* hookscript = NULL;
char* dbfname = NULL;
int ch;
srand( time(0) );
/* VIDs all have a randomized base to provoke crashes in poorly written scripts,
* only -g will make their base and sequence repeatable */
while ((ch = getopt_long(argc, argv,
"w:h:mx:y:fsW:d:Sq:a:p:b:B:M:O:t:H:g1:2:V", longopts, NULL)) >= 0){
switch (ch) {
case '?' :
usage();
exit(EXIT_SUCCESS);
break;
case 'w' : width = strtol(optarg, NULL, 10); break;
case 'h' : height = strtol(optarg, NULL, 10); break;
case 'm' : conservative = true; break;
case 'f' : fullscreen = true; break;
case 's' : windowed = true; break;
case 'W' : platform_video_setsynch(optarg); break;
case 'd' : dbfname = strdup(optarg); break;
case 'S' : nosound = true; break;
case 'q' : settings.timedump = strtol(optarg, NULL, 10); break;
case 'p' : arcan_override_namespace(optarg, RESOURCE_APPL_SHARED); break;
case 'b' : fallback = strdup(optarg); break;
case 'V' : fprintf(stdout, "%s\nshmif-%" PRIu64"\nluaapi-%d:%d\n",
ARCAN_BUILDVERSION, arcan_shmif_cookie(), LUAAPI_VERSION_MAJOR,
LUAAPI_VERSION_MINOR
);
exit(EXIT_SUCCESS);
break;
case 'H' : hookscript = strdup( optarg ); break;
#ifndef _WIN32
case 'M' : settings.monitor_counter = settings.monitor =
abs( (int)strtol(optarg, NULL, 10) ); break;
case 'O' : monitor_arg = strdup( optarg ); break;
#endif
case 't' :
arcan_override_namespace(optarg, RESOURCE_SYS_APPLBASE);
arcan_override_namespace(optarg, RESOURCE_SYS_APPLSTORE);
break;
case 'B' :
arcan_override_namespace(optarg, RESOURCE_SYS_BINS);
break;
case 'g' :
debuglevel++;
srand(0xdeadbeef);
break;
break;
case '1' :
stdout_redirected = true;
if (freopen(optarg, "a", stdout) == NULL);
break;
case '2' :
stderr_redirected = true;
if (freopen(optarg, "a", stderr) == NULL);
break;
default:
break;
}
}
if (optind >= argc){
arcan_warning("Couldn't start, missing 'applname' argument. \n"
"Consult the manpage (man arcan) for additional details\n");
usage();
exit(EXIT_SUCCESS);
}
/* probe system, load environment variables, ... */
arcan_set_namespace_defaults();
arcan_ffunc_initlut();
#ifdef DISABLE_FRAMESERVERS
arcan_override_namespace("", RESOURCE_SYS_BINS);
#endif
const char* err_msg;
if (!arcan_verifyload_appl(argv[optind], &err_msg)){
arcan_warning("arcan_verifyload_appl(), "
"failed to load (%s), reason: %s.",
argv[optind], err_msg);
if (fallback){
arcan_warning("trying to load fallback application (%s)\n", fallback);
if (!arcan_verifyload_appl(fallback, &err_msg)){
arcan_warning("fallback application failed to load (%s), giving up.\n",
err_msg);
goto error;
}
}
else
goto error;
}
if (!arcan_verify_namespaces(false)){
arcan_warning("namespace verification failed, status:\n");
goto error;
}
if (debuglevel > 1)
arcan_verify_namespaces(true);
#ifndef _WIN32
/* pipe to file, socket or launch script based on monitor output,
* format will be LUA tables with the exception of each cell ending with
* #ENDSAMPLE . The block will be sampled, parsed and should return a table
* pushed through the sample() function in the LUA space */
if (settings.in_monitor){
settings.mon_infd = strtol( getenv("ARCAN_MONITOR_FD"), NULL, 10);
}
else if (settings.monitor > 0){
extern arcan_benchdata benchdata;
benchdata.bench_enabled = true;
if (strncmp(monitor_arg, "LOG:", 4) == 0){
settings.mon_outf = fopen(&monitor_arg[4], "w+");
if (NULL == settings.mon_outf)
arcan_fatal("couldn't open log output (%s) for writing\n",
monitor_arg[4]);
fcntl(fileno(settings.mon_outf), F_SETFD, FD_CLOEXEC);
}
else {
int pair[2];
pid_t p1;
if (pipe(pair) == 0)
;
if ( (p1 = fork()) == 0){
close(pair[1]);
/* double-fork to get away from parent */
if (fork() != 0)
exit(EXIT_SUCCESS);
/*
* set the descriptor of the inherited pipe as an envvariable,
* this will have the program be launched with in_monitor set to true
* the monitor args will then be ignored and appname replaced with
* the monitorarg
*/
char monfd_buf[8] = {0};
snprintf(monfd_buf, 8, "%d", pair[0]);
setenv("ARCAN_MONITOR_FD", monfd_buf, 1);
argv[optind] = strdup(monitor_arg);
execv(argv[0], argv);
exit(EXIT_FAILURE);
}
else {
/* don't terminate just because the pipe gets broken (i.e. dead monitor) */
close(pair[0]);
settings.mon_outf = fdopen(pair[1], "w");
signal(SIGPIPE, SIG_IGN);
}
}
fullscreen = false;
}
#else
if (!stdout_redirected){
}
#endif
/*
* try to open the specified database,
* if that fails, warn, try to create an empty
* database and if that fails, give up.
*/
if (!dbfname)
dbfname = arcan_expand_resource("arcandb.sqlite", RESOURCE_APPL_SHARED);
dbhandle = arcan_db_open(dbfname, arcan_appl_id());
if (!dbhandle) {
arcan_warning("Couldn't open database (requested: %s),"
"trying to create a new one.\n", dbfname);
FILE* fpek = fopen(dbfname, "w+");
/* case of non-write:able dbpath */
if (!fpek){
arcan_mem_free(dbfname);
dbfname = arcan_expand_resource("arcandb.sqlite", RESOURCE_APPL_TEMP);
if (!dbfname)
goto error;
fpek = fopen(dbfname, "w+");
}
if (fpek){
fclose(fpek);
dbhandle = arcan_db_open(dbfname, arcan_appl_id());
}
if (!dbhandle){
arcan_warning("Couldn't create database, using in-mem fallback\n");
dbhandle = arcan_db_open(":memory:", arcan_appl_id());
}
if (!dbhandle){
arcan_warning("In memory db fallback failed, giving up\n");
goto error;
}
}
/* either use previous explicit dimensions (if found and cached)
* or revert to platform default or store last */
if (-1 == width){
char* dbw = arcan_db_appl_val(dbhandle, "arcan", "width");
if (dbw){
width = (uint16_t) strtoul(dbw, NULL, 10);
arcan_mem_free(dbw);
}
else
width = 0;
}
else{
char buf[6] = {0};
snprintf(buf, sizeof(buf), "%d", width);
arcan_db_appl_kv(dbhandle, "arcan", "width", buf);
}
if (-1 == height){
char* dbh = arcan_db_appl_val(dbhandle, "arcan", "height");
if (dbh){
height = (uint16_t) strtoul(dbh, NULL, 10);
arcan_mem_free(dbh);
}
else
height = 0;
}
else{
char buf[6] = {0};
snprintf(buf, sizeof(buf), "%d", height);
arcan_db_appl_kv(dbhandle, "arcan", "height", buf);
}
arcan_video_default_scalemode(scalemode);
if (windowed)
fullscreen = false;
/* grab video, (necessary) */
if (arcan_video_init(width, height, 32, fullscreen, windowed,
conservative, arcan_appl_id()) != ARCAN_OK){
arcan_fatal("Error; Couldn't initialize video system,"
"try other windowing options (-f, -w, ...)\n");
}
/* defined in warning.c for arcan_fatal, we avoid the use of an
* atexit() as this can be routed through abort() or similar
* functions but some video platforms are extremely volatile
* if we don't initiate a shutdown (egl-dri for one) */
extern void(*arcan_fatal_hook)(void);
arcan_fatal_hook = arcan_video_shutdown;
errno = 0;
/* grab audio, (possible to live without) */
if (ARCAN_OK != arcan_audio_setup(nosound))
arcan_warning("Warning: No audio devices could be found.\n");
arcan_math_init();
/* setup device polling, cleanup, ... */
arcan_evctx* def = arcan_event_defaultctx();
arcan_event_init( def );
#ifdef ARCAN_LED
arcan_led_init();
#endif
/*
* system integration note here, this could essentially provide
* a side-channel into debugdata as the path can be expanded to
* the debug directory, thus a compromised frameserver could possibly
* leak crash-dumps etc. outside the sandbox. If this is a concern,
* change this behavior or define a different logpath in the env.
*/
if (getenv("ARCAN_FRAMESERVER_LOGDIR") == NULL){
char* lpath = arcan_expand_resource("", RESOURCE_SYS_DEBUG);
setenv("ARCAN_FRAMESERVER_LOGDIR", lpath, 1);
arcan_mem_free(lpath);
}
if (hookscript){
char* tmphook = arcan_expand_resource(hookscript, RESOURCE_APPL_SHARED);
free(hookscript);
hookscript = NULL;
if (tmphook){
data_source src = arcan_open_resource(tmphook);
if (src.fd != BADFD){
map_region reg = arcan_map_resource(&src, false);
if (reg.ptr){
hookscript = strdup(reg.ptr);
arcan_release_map(reg);
}
arcan_release_resource(&src);
}
free(tmphook);
}
}
#ifndef _WIN32
system_page_size = sysconf(_SC_PAGE_SIZE);
#endif
/*
* fallback implementation resides here and a little further down
* in the "if adopt" block. Use verifyload to reconfigure application
* namespace and scripts to run, then recoverexternal will cleanup
* audio/video/event and invoke adopt() in the script
*/
bool adopt = false, in_recover = false;
int jumpcode = setjmp(arcanmain_recover_state);
if (jumpcode == 1){
arcan_db_close(&dbhandle);
dbhandle = arcan_db_open(dbfname, arcan_appl_id());
if (!dbhandle)
goto error;
adopt = true;
}
else if (jumpcode == 2){
if (in_recover){
arcan_warning("Double-Failure (main appl + adopt appl), giving up.\n");
goto error;
}
if (!fallback){
arcan_warning("Lua VM instance failed and no "
"fallback defined, giving up.\n");
goto error;
}
const char* errmsg;
arcan_lua_shutdown(settings.lua);
if (!arcan_verifyload_appl(fallback, &errmsg)){
arcan_warning("Lua VM error fallback, failure loading (%s), reason: %s\n",
fallback, errmsg);
goto error;
}
if (!arcan_verify_namespaces(false))
goto error;
in_recover = true;
adopt = true;
}
/* setup VM, map arguments and possible overrides */
settings.lua = arcan_lua_alloc();
arcan_lua_mapfunctions(settings.lua, debuglevel);
bool inp_file;
const char* inp = arcan_appl_basesource(&inp_file);
if (!inp){
arcan_warning("main(), No main script found for (%s)\n", arcan_appl_id());
goto error;
}
char* msg = arcan_lua_main(settings.lua, inp, inp_file);
if (msg != NULL){
#ifdef ARCAN_LUA_NOCOLOR
arcan_warning("\nParsing error in %s:\n%s\n", arcan_appl_id(), msg);
#else
arcan_warning("\n\x1b[1mParsing error in (\x1b[33m%s\x1b[39m):\n"
"\x1b[35m%s\x1b[22m\x1b[39m\n\n", arcan_appl_id(), msg);
#endif
goto error;
}
free(msg);
/* entry point follows the name of the appl,
* hand over execution and begin event loop */
if (argc > optind)
arcan_lua_pushargv(settings.lua, argv + optind + 1);
if (!arcan_lua_callvoidfun(settings.lua, "", false))
arcan_fatal("couldn't load appl, missing %s function\n", arcan_appl_id() ?
arcan_appl_id() : "");
if (hookscript)
arcan_lua_dostring(settings.lua, hookscript);
if (adopt){
int saved, truncated;
arcan_video_recoverexternal(false, &saved, &truncated,
arcan_lua_adopt, settings.lua);
arcan_warning("switching applications, %d adopted.\n", saved);
}
arcan_evctx* evctx = arcan_event_defaultctx();
bool done = false;
int exit_code = EXIT_SUCCESS;
arcan_event ev;
while (!done) {
/* these can populate event queue, but only to a certain limit */
arcan_video_pollfeed();
arcan_audio_refresh();
float frag = arcan_event_process(evctx, on_clock_pulse);
while (1 == arcan_event_poll(evctx, &ev)){
switch (ev.category){
case EVENT_VIDEO:
if (ev.vid.kind == EVENT_VIDEO_EXPIRE)
arcan_video_deleteobject(ev.vid.source);
break;
/* this event category is never propagated to the scripting engine itself */
case EVENT_SYSTEM:
if (ev.sys.kind == EVENT_SYSTEM_EXIT){
exit_code = ev.sys.errcode;
done = true;
goto out;
}
goto error;
default:
break;
}
arcan_lua_pushevent(settings.lua, &ev);
}
platform_video_synch(settings.tick_count, frag, preframe, postframe);
}
out:
free(hookscript);
arcan_lua_callvoidfun(settings.lua, "shutdown", false);
#ifdef ARCAN_LED
arcan_led_shutdown();
#endif
arcan_video_shutdown();
arcan_event_deinit(arcan_event_defaultctx());
arcan_mem_free(dbfname);
if (dbhandle)
arcan_db_close(&dbhandle);
return exit_code;
error:
if (debuglevel > 1){
arcan_warning("fatal: main loop failed, arguments: \n");
for (size_t i = 0; i < argc; i++)
arcan_warning("%s ", argv[i]);
arcan_warning("\n\n");
}
arcan_mem_free(dbfname);
arcan_video_shutdown();
arcan_event_deinit(arcan_event_defaultctx());
/* for cases where we have a broken namespace, also dump
* the current namespace state as that might help troubleshoot */
arcan_verify_namespaces(true);
return EXIT_FAILURE;
}