2 * Copyright (C) 2015 "IoT.bzh"
3 * Author "Fulup Ar Foll"
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * Author: "Fulup Ar Foll"
23 * Created on 05 December 2015, 15:38
26 #include "local-def.h"
34 static sigjmp_buf exitPoint; // context save for set/longjmp
36 /*----------------------------------------------------------
38 | print version and copyright
39 +--------------------------------------------------------- */
40 static void printVersion (void) {
42 fprintf (stderr,"\n----------------------------------------- \n");
43 fprintf (stderr,"| AFB [Application Framework Binder] version=%s |\n", AJQ_VERSION);
44 fprintf (stderr,"----------------------------------------- \n");
45 fprintf (stderr,"| Copyright(C) 2015 Fulup Ar Foll /IoT.bzh [fulup -at- iot.bzh]\n");
46 fprintf (stderr,"| AFB comes with ABSOLUTELY NO WARRANTY.\n");
47 fprintf (stderr,"| Licence [what ever makes you happy] until you fix bugs by yourself :)\n\n");
52 // Define command line option
53 #define SET_VERBOSE 101
54 #define SET_BACKGROUND 105
55 #define SET_FORGROUND 106
56 #define KILL_PREV_EXIT 107
57 #define KILL_PREV_REST 108
58 #define SET_FAKE_MOD 109
60 #define SET_TCP_PORT 120
61 #define SET_ROOT_DIR 121
62 #define SET_ROOT_BASE 122
63 #define SET_ROOT_API 123
64 #define SET_ROOT_ALIAS 124
66 #define SET_CACHE_TO 130
67 #define SET_USERID 131
68 #define SET_PID_FILE 132
69 #define SET_SESSION_DIR 133
70 #define SET_CONFIG_FILE 134
71 #define SET_CONFIG_SAVE 135
72 #define SET_CONFIG_EXIT 138
74 #define SET_AUTH_TOKEN 141
75 #define SET_LDPATH 142
76 #define SET_APITIMEOUT 143
77 #define SET_CNTXTIMEOUT 144
79 #define DISPLAY_VERSION 150
80 #define DISPLAY_HELP 151
86 static AFB_options cliOptions [] = {
87 {SET_VERBOSE ,0,"verbose" , "Verbose Mode"},
89 {SET_FORGROUND ,0,"foreground" , "Get all in foreground mode"},
90 {SET_BACKGROUND ,0,"daemon" , "Get all in background mode"},
91 {KILL_PREV_EXIT ,0,"kill" , "Kill active process if any and exit"},
92 {KILL_PREV_REST ,0,"restart" , "Kill active process if any and restart"},
94 {SET_TCP_PORT ,1,"port" , "HTTP listening TCP port [default 1234]"},
95 {SET_ROOT_DIR ,1,"rootdir" , "HTTP Root Directory [default $HOME/.AFB]"},
96 {SET_ROOT_BASE ,1,"rootbase" , "Angular Base Root URL [default /opa]"},
97 {SET_ROOT_API ,1,"rootapi" , "HTML Root API URL [default /api]"},
98 {SET_ROOT_ALIAS ,1,"alias" , "Muliple url map outside of rootdir [eg: --alias=/icons:/usr/share/icons]"},
100 {SET_APITIMEOUT ,1,"apitimeout" , "Plugin API timeout in seconds [default 10]"},
101 {SET_CNTXTIMEOUT ,1,"cntxtimeout" , "Client Session Context Timeout [default 900]"},
102 {SET_CACHE_TO ,1,"cache-eol" , "Client cache end of live [default 3600s]"},
104 {SET_USERID ,1,"setuid" , "Change user id [default don't change]"},
105 {SET_PID_FILE ,1,"pidfile" , "PID file path [default none]"},
106 {SET_SESSION_DIR ,1,"sessiondir" , "Sessions file path [default rootdir/sessions]"},
107 {SET_CONFIG_FILE ,1,"config" , "Config Filename [default rootdir/sessions/configs/default.AFB]"},
108 {SET_CONFIG_SAVE ,0,"save" , "Save config on disk [default no]"},
109 {SET_CONFIG_EXIT ,0,"saveonly" , "Save config on disk and then exit"},
111 {SET_LDPATH ,1,"ldpaths" , "Load Plugins from dir1:dir2:... [default = PLUGIN_INSTALL_DIR"},
112 {SET_AUTH_TOKEN ,1,"token" , "Initial Secret [default=no-session, --token="" for session without authentication]"},
114 {DISPLAY_VERSION ,0,"version" , "Display version and copyright"},
115 {DISPLAY_HELP ,0,"help" , "Display this help"},
117 {SET_MODE ,1,"mode" , "set the mode: either local, remote or global"},
121 static AFB_aliasdir aliasdir[MAX_ALIAS];
122 static int aliascount=0;
124 /*----------------------------------------------------------
127 +--------------------------------------------------------- */
128 void signalQuit (int signum) {
132 // unlock timeout signal to allow a new signal to come
133 sigemptyset (&sigset);
134 sigaddset (&sigset, SIGABRT);
135 sigprocmask (SIG_UNBLOCK, &sigset, 0);
137 fprintf (stderr, "%s ERR:Received signal quit\n",configTime());
138 syslog (LOG_ERR, "Daemon got kill3 & quit [please report bug]");
139 longjmp (exitPoint, signum);
143 /*----------------------------------------------------------
145 | print information from long option array
146 +--------------------------------------------------------- */
148 static void printHelp(char *name) {
152 fprintf (stderr,"%s:\nallowed options\n", name);
153 for (ind=0; cliOptions [ind].name != NULL;ind++)
156 if (cliOptions [ind].has_arg == 0 )
158 fprintf (stderr," --%-15s %s\n", cliOptions [ind].name, cliOptions[ind].help);
160 sprintf(command,"%s=xxxx", cliOptions [ind].name);
161 fprintf (stderr," --%-15s %s\n", command, cliOptions[ind].help);
164 fprintf (stderr,"Example:\n %s\\\n --verbose --port=1234 --token='azerty' --ldpaths=build/plugins:/usr/lib64/agl/plugins\n", name);
167 /*----------------------------------------------------------
169 | write a file in /var/run/AFB with pid
170 +--------------------------------------------------------- */
171 static int writePidFile (AFB_config *config, int pid) {
174 // if no pid file configure just return
175 if (config->pidfile == NULL) return 0;
177 // open pid file in write mode
178 file = fopen(config->pidfile,"w");
180 fprintf (stderr,"%s ERR:writePidFile fail to open [%s]\n",configTime(), config->pidfile);
184 // write pid in file and close
185 fprintf (file, "%d\n", pid);
190 /*----------------------------------------------------------
192 | read file in /var/run/AFB with pid
193 +--------------------------------------------------------- */
194 static int readPidFile (AFB_config *config) {
199 if (config->pidfile == NULL) return -1;
201 // open pid file in write mode
202 file = fopen(config->pidfile,"r");
204 fprintf (stderr,"%s ERR:readPidFile fail to open [%s]\n",configTime(), config->pidfile);
208 // write pid in file and close
209 status = fscanf (file, "%d\n", &pid);
213 if (status != 1) return -1;
218 /*----------------------------------------------------------
220 | try to close everything before leaving
221 +--------------------------------------------------------- */
222 static void closeSession (AFB_session *session) {
227 /*----------------------------------------------------------
229 | Main listening HTTP loop
230 +--------------------------------------------------------- */
231 static void listenLoop (AFB_session *session) {
234 if (signal (SIGABRT, signalQuit) == SIG_ERR) {
235 fprintf (stderr, "%s ERR: main fail to install Signal handler\n", configTime());
239 // ------ Start httpd server
240 if (session->config->httpdPort > 0) {
242 err = httpdStart (session);
243 if (err != AFB_SUCCESS) return;
248 fprintf (stderr, "hoops returned from infinite loop [report bug]\n");
252 /*---------------------------------------------------------
254 | Parse option and launch action
255 +--------------------------------------------------------- */
257 int main(int argc, char *argv[]) {
258 AFB_session *session;
259 char* programName = argv [0];
261 int optc, ind, consoleFD;
262 int pid, nbcmd, status;
263 AFB_config cliconfig; // temp structure to store CLI option before file config upload
265 // ------------- Build session handler & init config -------
266 session = configInit ();
267 memset(&cliconfig,0,sizeof(cliconfig));
268 memset(&aliasdir ,0,sizeof(aliasdir));
269 cliconfig.aliasdir = aliasdir;
271 // GNU CLI getopts nterface.
272 struct option ggcOption;
273 struct option *gnuOptions;
275 // ------------------ Process Command Line -----------------------
277 // if no argument print help and return
279 printHelp(programName);
283 // build GNU getopt info from cliOptions
284 nbcmd = sizeof (cliOptions) / sizeof (AFB_options);
285 gnuOptions = malloc (sizeof (ggcOption) * nbcmd);
286 for (ind=0; ind < nbcmd;ind++) {
287 gnuOptions [ind].name = cliOptions[ind].name;
288 gnuOptions [ind].has_arg = cliOptions[ind].has_arg;
289 gnuOptions [ind].flag = 0;
290 gnuOptions [ind].val = cliOptions[ind].val;
293 // get all options from command line
294 while ((optc = getopt_long (argc, argv, "vsp?", gnuOptions, &optionIndex))
304 if (optarg == 0) goto needValueForOption;
305 if (!sscanf (optarg, "%d", &cliconfig.httpdPort)) goto notAnInteger;
309 if (optarg == 0) goto needValueForOption;
310 if (!sscanf (optarg, "%d", &cliconfig.apiTimeout)) goto notAnInteger;
313 case SET_CNTXTIMEOUT:
314 if (optarg == 0) goto needValueForOption;
315 if (!sscanf (optarg, "%d", &cliconfig.cntxTimeout)) goto notAnInteger;
319 if (optarg == 0) goto needValueForOption;
320 cliconfig.rootdir = optarg;
321 if (verbose) fprintf(stderr, "Forcing Rootdir=%s\n",cliconfig.rootdir);
325 if (optarg == 0) goto needValueForOption;
326 cliconfig.rootbase = optarg;
327 if (verbose) fprintf(stderr, "Forcing Rootbase=%s\n",cliconfig.rootbase);
331 if (optarg == 0) goto needValueForOption;
332 cliconfig.rootapi = optarg;
333 if (verbose) fprintf(stderr, "Forcing Rootapi=%s\n",cliconfig.rootapi);
337 if (optarg == 0) goto needValueForOption;
338 if (aliascount < MAX_ALIAS) {
339 aliasdir[aliascount].url = strsep(&optarg,":");
340 aliasdir[aliascount].path = strsep(&optarg,":");
341 aliasdir[aliascount].len = strlen(aliasdir[aliascount].url);
342 if (verbose) fprintf(stderr, "Alias url=%s path=%s\n", aliasdir[aliascount].url, aliasdir[aliascount].path);
345 fprintf(stderr, "Too many aliases [max:%s] %s ignored\n", optarg, MAX_ALIAS-1);
350 if (optarg == 0) goto needValueForOption;
351 cliconfig.token = optarg;
355 if (optarg == 0) goto needValueForOption;
356 cliconfig.ldpaths = optarg;
360 if (optarg == 0) goto needValueForOption;
361 cliconfig.pidfile = optarg;
364 case SET_SESSION_DIR:
365 if (optarg == 0) goto needValueForOption;
366 cliconfig.sessiondir = optarg;
369 case SET_CONFIG_FILE:
370 if (optarg == 0) goto needValueForOption;
371 cliconfig.configfile = optarg;
375 if (optarg == 0) goto needValueForOption;
376 if (!sscanf (optarg, "%d", &cliconfig.cacheTimeout)) goto notAnInteger;
379 case SET_CONFIG_EXIT:
380 if (optarg != 0) goto noValueForOption;
381 session->configsave = 1;
382 session->forceexit = 1;
385 case SET_CONFIG_SAVE:
386 if (optarg != 0) goto noValueForOption;
387 session->configsave = 1;
391 if (optarg == 0) goto needValueForOption;
392 if (!sscanf (optarg, "%s", &cliconfig.setuid)) goto notAnInteger;
396 if (optarg != 0) goto noValueForOption;
397 session->fakemod = 1;
401 if (optarg != 0) goto noValueForOption;
402 session->foreground = 1;
406 if (optarg != 0) goto noValueForOption;
407 session->background = 1;
411 if (optarg != 0) goto noValueForOption;
412 session->killPrevious = 1;
416 if (optarg != 0) goto noValueForOption;
417 session->killPrevious = 2;
421 if (optarg == 0) goto needValueForOption;
422 if (!strcmp(optarg, "local")) cliconfig.mode = AFB_MODE_LOCAL;
423 else if (!strcmp(optarg, "remote")) cliconfig.mode = AFB_MODE_REMOTE;
424 else if (!strcmp(optarg, "global")) cliconfig.mode = AFB_MODE_GLOBAL;
428 case DISPLAY_VERSION:
429 if (optarg != 0) goto noValueForOption;
435 printHelp(programName);
441 // if exist merge config file with CLI arguments
442 configLoadFile (session, &cliconfig);
443 initPlugins(session);
445 // ------------------ sanity check ----------------------------------------
446 if ((session->background) && (session->foreground)) {
447 fprintf (stderr, "%s ERR: cannot select foreground & background at the same time\n",configTime());
451 // ------------------ Some useful default values -------------------------
452 if ((session->background == 0) && (session->foreground == 0)) session->foreground=1;
454 // open syslog if ever needed
455 openlog("AFB-log", 0, LOG_DAEMON);
457 // -------------- Try to kill any previous process if asked ---------------------
458 if (session->killPrevious) {
459 pid = readPidFile (session->config); // enforce commandline option
462 fprintf (stderr, "%s ERR:main --kill ignored no PID file [%s]\n",configTime(), session->config->pidfile);
465 fprintf (stderr, "%s ERR:main --kill ignored no active AFB process\n",configTime());
468 status = kill (pid,SIGINT );
470 if (verbose) printf ("%s INF:main signal INTR sent to pid:%d \n", configTime(), pid);
473 status = kill (pid,9);
474 if (status != 0) fprintf (stderr, "%s ERR:main failled to killed pid=%d \n",configTime(), pid);
478 if (session->killPrevious >= 2) goto normalExit;
479 } // end killPrevious
482 // ------------------ clean exit on CTR-C signal ------------------------
483 if (signal (SIGINT, signalQuit) == SIG_ERR) {
484 fprintf (stderr, "%s Quit Signal received.",configTime());
488 // save exitPoint context when returning from longjmp closeSession and exit
489 status = setjmp (exitPoint); // return !+ when coming from longjmp
491 if (verbose) printf ("INF:main returning from longjump after signal [%d]\n", status);
492 closeSession (session);
496 // let's run this program with a low priority
499 // ------------------ Finaly Process Commands -----------------------------
500 // if --save then store config on disk upfront
501 if (session->configsave) configStoreFile (session);
502 if (session->forceexit) exit (0);
504 if (session->config->setuid) {
506 struct passwd *passwd;
507 passwd=getpwnam(session->config->setuid);
509 if (passwd == NULL) goto errorSetuid;
511 err = setuid(passwd->pw_uid);
512 if (err) goto errorSetuid;
515 // let's not take the risk to run as ROOT
516 //if (getuid() == 0) goto errorNoRoot;
518 // check session dir and create if it does not exist
519 if (sessionCheckdir (session) != AFB_SUCCESS) goto errSessiondir;
520 if (verbose) fprintf (stderr, "AFB:notice Init config done\n");
524 // ---- run in foreground mode --------------------
525 if (session->foreground) {
527 if (verbose) fprintf (stderr,"AFB:notice Foreground mode\n");
529 // write a pid file for --kill-previous and --raise-debug option
530 status = writePidFile (session->config, getpid());
531 if (status == -1) goto errorPidFile;
533 // enter listening loop in foreground
539 // --------- run in background mode -----------
540 if (session->background) {
542 // if (status != 0) goto errorCommand;
543 if (verbose) printf ("AFB: Entering background mode\n");
545 // open /dev/console to redirect output messAFBes
546 consoleFD = open(session->config->console, O_WRONLY | O_APPEND | O_CREAT , 0640);
547 if (consoleFD < 0) goto errConsole;
549 // fork process when running background mode
552 // son process get all data in standalone mode
555 printf ("\nAFB: background mode [pid:%d console:%s]\n", getpid(),session->config->console);
556 if (verbose) printf ("AFB:info use '%s --restart --rootdir=%s # [--pidfile=%s] to restart daemon\n", programName,session->config->rootdir, session->config->pidfile);
558 // redirect default I/O on console
559 close (2); status=dup(consoleFD); // redirect stderr
560 close (1); status=dup(consoleFD); // redirect stdout
561 close (0); // no need for stdin
564 setsid(); // allow father process to fully exit
565 sleep (2); // allow main to leave and release port
567 fprintf (stderr, "----------------------------\n");
568 fprintf (stderr, "%s INF:main background pid=%d\n", configTime(), getpid());
571 // if everything look OK then look forever
572 syslog (LOG_ERR, "AFB: Entering infinite loop in background mode");
574 // should normally never return from this loop
576 syslog (LOG_ERR, "AFB:FAIL background infinite loop exited check [%s]\n", session->config->console);
581 // if fail nothing much to do
582 if (pid == -1) goto errorFork;
584 // fork worked and we are in father process
585 status = writePidFile (session->config, pid);
586 if (status == -1) goto errorPidFile;
588 // we are in father process, we don't need this one
591 } // end background-foreground
594 closeSession (session); // try to close everything before leaving
595 if (verbose) printf ("\n---- Application Framework Binder Normal End ------\n");
598 // ------------- Fatal ERROR display error and quit -------------
600 fprintf (stderr,"\nERR:AFB-daemon Failed to change UID to username=[%s]\n\n", session->config->setuid);
604 // fprintf (stderr,"\nERR:AFB-daemon Not allow to run as root [use --seteuid=username option]\n\n");
608 fprintf (stderr,"\nERR:AFB-daemon Failed to write pid file [%s]\n\n", session->config->pidfile);
612 fprintf (stderr,"\nERR:AFB-daemon Failed to fork son process\n\n");
616 fprintf (stderr,"\nERR:AFB-daemon option [--%s] need a value i.e. --%s=xxx\n\n"
617 ,gnuOptions[optionIndex].name, gnuOptions[optionIndex].name);
621 fprintf (stderr,"\nERR:AFB-daemon option [--%s] don't take value\n\n"
622 ,gnuOptions[optionIndex].name);
626 fprintf (stderr,"\nERR:AFB-daemon option [--%s] requirer an interger i.e. --%s=9\n\n"
627 ,gnuOptions[optionIndex].name, gnuOptions[optionIndex].name);
631 fprintf (stderr,"\nERR:AFB-daemon option [--%s] only accepts local, global or remote.\n\n"
632 ,gnuOptions[optionIndex].name);
636 fprintf (stderr,"\n%s INF:AFB-daemon pid=%d received exit signal (Hopefully crtl-C or --kill-previous !!!)\n\n"
637 ,configTime(), getpid());
641 fprintf (stderr,"\nERR:AFB-daemon cannot open /dev/console (use --foreground)\n\n");
645 fprintf (stderr,"\nERR:AFB-daemon cannot read/write session dir\n\n");
649 fprintf (stderr,"\nERR:AFB-daemon fail to probe sound cards\n\n");
653 // try to unlink pid file if any
654 if (session->background && session->config->pidfile != NULL) unlink (session->config->pidfile);
657 }; /* END AFB-daemon() */