Ejemplo n.º 1
0
/* main() for udpxrec module
 */
int udpxrec_main( int argc, char* const argv[] )
{
    int rc = 0, ch = 0, custom_log = 0, no_daemon = 0;
    static const char OPTMASK[] = "vb:e:M:p:B:n:m:l:c:R:u:T";
    time_t now = time(NULL);
    char now_buf[ 32 ] = {0}, sel_buf[ 32 ] = {0}, app_finfo[80] = {0};

    extern int optind, optopt;
    extern const char IPv4_ALL[];

    mk_app_info(g_udpxrec_app, g_app_info, sizeof(g_app_info) - 1);

    if( argc < 2 ) {
        usage( argv[0], stderr );
        return ERR_PARAM;
    }

    rc = init_recopt( &g_recopt );
    while( (0 == rc) && (-1 != (ch = getopt( argc, argv, OPTMASK ))) ) {
        switch(ch) {
            case 'T':   no_daemon = 1; break;
            case 'v':   set_verbose( &g_recopt.is_verbose ); break;
            case 'b':
                        if( (time_t)0 != g_recopt.end_time ) {
                            (void) fprintf( stderr, "Cannot specify start-recording "
                                    "time after end-recording time has been set\n" );
                        }

                        rc = a2time( optarg, &g_recopt.bg_time, time(NULL) );
                        if( 0 != rc ) {
                            (void) fprintf( stderr, "Invalid time: [%s]\n", optarg );
                            rc = ERR_PARAM;
                        }
                        else {
                            if( g_recopt.bg_time < now ) {
                                (void)strncpy( now_buf, Zasctime(localtime( &now )),
                                        sizeof(now_buf) );
                                (void)strncpy( sel_buf,
                                        Zasctime(localtime( &g_recopt.bg_time )),
                                        sizeof(sel_buf) );

                                (void) fprintf( stderr,
                                        "Selected %s time is in the past, "
                                        "now=[%s], selected=[%s]\n", "start",
                                        now_buf, sel_buf );
                                rc = ERR_PARAM;
                            }
                        }

                        break;
            case 'e':
                        if( (time_t)0 == g_recopt.bg_time ) {
                            g_recopt.bg_time = time(NULL);
                            (void)fprintf( stderr,
                                    "Start-recording time defaults to now [%s]\n",
                                    Zasctime( localtime( &g_recopt.bg_time ) ) );
                        }

                        rc = a2time( optarg, &g_recopt.end_time, g_recopt.bg_time );
                        if( 0 != rc ) {
                            (void) fprintf( stderr, "Invalid time: [%s]\n", optarg );
                            rc = ERR_PARAM;
                        }
                        else {
                            if( g_recopt.end_time < now ) {
                                (void)strncpy( now_buf, Zasctime(localtime( &now )),
                                        sizeof(now_buf) );
                                (void)strncpy( sel_buf,
                                        Zasctime(localtime( &g_recopt.end_time )),
                                        sizeof(sel_buf) );

                                (void) fprintf( stderr,
                                        "Selected %s time is in the past, "
                                        "now=[%s], selected=[%s]\n", "end",
                                        now_buf, sel_buf );
                                rc = ERR_PARAM;
                            }
                        }
                        break;

            case 'M':
                        rc = a2int64( optarg, &g_recopt.max_fsize );
                        if( 0 != rc ) {
                            (void) fprintf( stderr, "Invalid file size: [%s]\n",
                                    optarg );
                            rc = ERR_PARAM;
                        }
                        break;
            case 'p':
                        g_recopt.pidfile = strdup(optarg);
                        break;

            case 'B':
                        rc = a2size( optarg, &g_recopt.bufsize );
                        if( 0 != rc ) {
                            (void) fprintf( stderr, "Invalid buffer size: [%s]\n",
                                    optarg );
                            rc = ERR_PARAM;
                        }
                        else if( (g_recopt.bufsize < MIN_MCACHE_LEN) ||
                                 (g_recopt.bufsize > MAX_MCACHE_LEN)) {
                            (void) fprintf( stderr,
                                "Buffer size must be in [%ld-%ld] bytes range\n",
                                (long)MIN_MCACHE_LEN, (long)MAX_MCACHE_LEN );
                            rc = ERR_PARAM;
                        }

                        break;
            case 'n':
                      g_recopt.nice_incr = atoi( optarg );
                      if( 0 == g_recopt.nice_incr ) {
                        (void) fprintf( stderr,
                            "Invalid nice-value increment: [%s]\n", optarg );
                        rc = ERR_PARAM;
                      }
                      break;
            case 'm':
                      rc = get_ipv4_address( optarg, g_recopt.mcast_addr,
                              sizeof(g_recopt.mcast_addr) );
                      if( 0 != rc ) {
                        (void) fprintf( stderr, "Invalid multicast address: [%s]\n",
                                        optarg );
                          rc = ERR_PARAM;
                      }
                      break;
            case 'l':
                      g_flog = fopen( optarg, "a" );
                      if( NULL == g_flog ) {
                        rc = errno;
                        (void) fprintf( stderr, "Error opening logfile [%s]: %s\n",
                                optarg, strerror(rc) );
                        rc = ERR_PARAM; break;
                      }

                      Setlinebuf( g_flog );
                      custom_log = 1;
                      break;

            case 'c':
                      rc = get_addrport( optarg, g_recopt.rec_channel,
                                         sizeof( g_recopt.rec_channel ),
                                         &g_recopt.rec_port );
                      if( 0 != rc ) rc = ERR_PARAM;
                      break;

            case 'R':
                      g_recopt.rbuf_msgs = atoi( optarg );
                      if( (g_recopt.rbuf_msgs <= 0) && (-1 != g_recopt.rbuf_msgs) ) {
                        (void) fprintf( stderr,
                                "Invalid rcache size: [%s]\n", optarg );
                        rc = ERR_PARAM;
                      }
                      break;

            case 'u':
                      g_recopt.waitupd_sec = atoi(optarg);
                      if( g_recopt.waitupd_sec <= 0 ) {
                          (void) fprintf( stderr, "Invalid wait-update value [%s] "
                                  "(must be a number > 0)\n", optarg );
                          rc = ERR_PARAM;
                      }
                      break;

            case ':':
                      (void) fprintf( stderr, "Option [-%c] requires an argument\n",
                              optopt );
                      rc = ERR_PARAM; break;
            case '?':
                      (void) fprintf( stderr, "Unrecognized option: [-%c]\n", optopt );
                      rc = ERR_PARAM; break;
            default:
                      usage( argv[0], stderr );
                      rc = ERR_PARAM; break;

        } /* switch */
    } /* while getopt */

    if( 0 == rc ) {
        if( optind >= argc ) {
            (void) fputs( "Missing destination file parameter\n", stderr );
            rc = ERR_PARAM;
        }
        else {
            g_recopt.dstfile = strdup( argv[optind] );
        }

        if( !(g_recopt.max_fsize > 0 || g_recopt.end_time)  ) {
            (void) fputs( "Must specify either max file [-M] size "
                    "or end time [-e]\n", stderr );
            rc = ERR_PARAM;
        }

        if( !g_recopt.rec_channel[0] || !g_recopt.rec_port ) {
            (void) fputs( "Must specify multicast channel to record from\n",
                    stderr );
            rc = ERR_PARAM;
        }
    }

    if( rc ) {
        free_recopt( &g_recopt );
        return rc;
    }

    do {
        if( '\0' == g_recopt.mcast_addr[0] ) {
            (void) strncpy( g_recopt.mcast_addr, IPv4_ALL,
                    sizeof(g_recopt.mcast_addr) - 1 );
        }

        if( !custom_log ) {
            /* in debug mode output goes to stderr, otherwise to /dev/null */
            g_flog = ((uf_TRUE == g_recopt.is_verbose)
                    ? stderr
                    : fopen( "/dev/null", "a" ));
            if( NULL == g_flog ) {
                perror("fopen");
                rc = ERR_INTERNAL; break;
            }
        }

        if( 0 == geteuid() ) {
            if( !no_daemon ) {
                if( stderr == g_flog ) {
                    (void) fprintf( stderr,
                        "Logfile must be specified to run "
                        "in verbose mode in background\n" );
                    rc = ERR_PARAM; break;
                }

                if( NULL == g_recopt.pidfile ) {
                    (void) fprintf( stderr, "pidfile must be specified "
                            "to run as daemon\n" );
                    rc = ERR_PARAM; break;
                }

                if( 0 != (rc = daemonize(0, g_flog)) ) {
                    rc = ERR_INTERNAL; break;
                }
            }

        } /* 0 == geteuid() */

        if( NULL != g_recopt.pidfile ) {
            rc = make_pidfile( g_recopt.pidfile, getpid(), g_flog );
            if( 0 != rc ) break;
        }

        (void) set_nice( g_recopt.nice_incr, g_flog );

        if( 0 != (rc = setup_signals()) ) break;

        TRACE( fprint_recopt( g_flog, &g_recopt ) );

        TRACE( printcmdln( g_flog, g_app_info, argc, argv ) );

        if( g_recopt.bg_time ) {
            if( 0 != (rc = verify_channel()) || g_quit )
                break;

            rc = wait_till( g_recopt.bg_time, g_recopt.waitupd_sec );
            if( rc || g_quit ) break;
        }

        rc = record();

        if( NULL != g_recopt.pidfile ) {
            if( -1 == unlink(g_recopt.pidfile) ) {
                mperror( g_flog, errno, "unlink [%s]", g_recopt.pidfile );
            }
        }
    }
    while(0);

    if( g_flog ) {
        (void)tmfprintf( g_flog, "%s is exiting with rc=[%d]\n",
                app_finfo, rc );
    }

    if( g_flog && (stderr != g_flog) ) {
        (void) fclose(g_flog);
    }

    free_recopt( &g_recopt );

    return rc;
}
Ejemplo n.º 2
0
/* generate service's (HTML) status page
 */
int
mk_status_page( const struct server_ctx* ctx,
                char* buf, size_t* len,
                int options )
{
    int n = -1;
    prbuf_t pb = NULL;
    time_t tm_now = time(NULL);
    const char* str_now = Zasctime(localtime(&tm_now));

    size_t num_clients = 0, i = 0;
    char* client_text = NULL;
    const char* page_format = NULL;
    const unsigned delay_msec = 3000;

    size_t text_size = 0, HEADER_SIZE = 0;
    static size_t MIN_PER_CLI = 80 + (3 * (IPADDR_STR_SIZE + 5) );

    extern const char  UDPXY_COPYRIGHT_NOTICE[];
    extern const char  COMPILE_MODE[];
    extern const char  VERSION[];
    extern const int   BUILDNUM;

    assert( ctx && buf && len );

    do {
        n = prbuf_open( &pb, buf, *len );
        if( -1 == n ) break;

        if( options & MSO_HTTP_HEADER ) {
            n = prbuf_printf( pb, "%s", HTML_PAGE_HEADER );
            if( n <= 0 ) break;
        }

        if( options & MSO_RESTART ) {
            n = prbuf_printf( pb, REDIRECT_SCRIPT_FMT, delay_msec );
            if( n <= 0 ) break;
        }

        for( i = 0, n = -1; n && (i < LEN_STAT_PAGE_BASE); ++i ) {
            n = prbuf_printf( pb, "%s", STAT_PAGE_BASE[i] );
        }
        if( n <= 0 ) break;

        for(text_size = 0, num_clients = 0, i = 0; i < ctx->clmax; ++i ) {
            if( ctx->cl[i].pid > 0 ) {
                ++num_clients;
                text_size += MIN_PER_CLI + strlen(ctx->cl[i].tail);
            }
        }

        if( ! (options & MSO_SKIP_CLIENTS) ) {
            if( num_clients > (size_t)0 ) {
                HEADER_SIZE =  strlen(ACLIENT_TABLE[0]);
                HEADER_SIZE += strlen(ACLIENT_TABLE[1]);

                text_size += HEADER_SIZE;
                if (text_size > *len) {
                    (void) tmfprintf(g_flog, "Client portion of memory [%ld bytes] > "
                        "[%ld bytes] of the page buffer.\n",
                        (long)text_size, (long)*len);
                    n = -1; break;
                }

                client_text = malloc( text_size );
                if( NULL == client_text ) {
                    mperror( g_flog, errno, "%s: calloc", __func__ );
                    n = -1;
                    break;
                }

                n = mk_client_entries( ctx, client_text, &text_size );
                if( -1 == n ) break;
            }
        } /* MSO_SKIP_CLIENTS */

        page_format = ( options & MSO_RESTART ) ? RST_PAGE_FMT1 : STAT_PAGE_FMT1;
        n = prbuf_printf( pb, page_format,
            getpid(), ctx->listen_addr, ctx->listen_port,
            ctx->mcast_ifc_addr,
            num_clients,
            (client_text ? client_text : ""),
            REQUEST_GUIDE,
            VERSION, BUILDNUM, COMPILE_MODE, str_now,
            UDPXY_COPYRIGHT_NOTICE );
        if( -1 == n ) break;

    } while(0);

    if( -1 == n ) {
        (void)tmfprintf( g_flog,
                "Error preparing status HTML: "
                "insufficient memory size=[%lu]\n", (u_long)(*len));
    }
    else {
        *len = prbuf_len( pb );
    }

    free( client_text );
    (void) prbuf_close( pb );

    return (n > 0 ? 0 : -1);
}