bool configure(int argc, char *argv[]) { #ifndef NO_CONFIG assert(options_okay()); /* I'm not too proud of this. Read command line first, because it may change * where the configuration file is. Then read the configuration file, and * read the command line again to override any options that may be set by * both. */ if (!read_cmdline(argc, argv) || !read_config()) return false; read_cmdline(argc, argv); #else // Unconfigurable build; we only do a minimal options loop. for (int a=1; argv[a]; ++a) { if (argv[a][0] != '-') { fprintf(stderr, "Invalid argument: '%s'. Try the -h option.\n", argv[a]); return false; } switch (argv[a][1]) { case 'd': break; // Quietly ignored case 'e': set_erase(0); break; case 'h': short_usage(); break; // Does not return case 'p': set_pidfile(0); break; case 'q': break; // Quietly ignored case 'v': break; // Quietly ignored case 'V': set_version(0); break; // Does not return default: fprintf(stderr,"Invalid option: '%s'. Try -h instead.\n",argv[a]); return false; } } #endif if (!main_check_config() || !memory_check_config() || !swaps_check_config() || !swapfs_large_enough()) return false; if (inspect) exit(EXIT_SUCCESS); return to_swapdir(); }
/** * parses command line arguments and assigns values to run time * variables. relies on GNU getopts included with this distribution. */ void parse_cmdline(CONF C, int argc, char *argv[]) { int c = 0; BOOLEAN display = FALSE; while ((c = getopt_long(argc, argv, "Vhvf:CDd:l:p:", long_options, (int *)0)) != EOF) { switch (c) { case 'V': display_version(TRUE); break; case 'h': display_help(EXIT_SUCCESS); case 'v': set_verbose(C, TRUE); break; case 'C': display = TRUE; break; //case 'f': //XXX: parsed separately // set_cfgfile(C, optarg); // break; case 'D': set_debug(C, TRUE); break; case 'd': if (!optarg) { puts("NO OPTARG"); } if (optarg != NULL && !strncasecmp(optarg, "false", 5)) { set_daemon(C, FALSE); } else { set_daemon(C, TRUE); } break; case 'l': set_logfile(C, optarg); break; case 'p': set_pidfile(C, optarg); break; } /* end of switch */ } /* end of while */ if (display) { show(C, TRUE); } return; } /* end of parse_cmdline */
int udpxy_main( int argc, char* const argv[] ) { int rc = 0, ch = 0, port = -1, custom_log = 0, no_daemon = 0; char ipaddr[IPADDR_STR_SIZE] = "\0", mcast_addr[IPADDR_STR_SIZE] = "\0"; char pidfile[ MAXPATHLEN ] = "\0"; u_short MIN_MCAST_REFRESH = 0, MAX_MCAST_REFRESH = 0; /* support for -r -w (file read/write) option is disabled by default; * those features are experimental and for dev debugging ONLY * */ #ifdef UDPXY_FILEIO static const char UDPXY_OPTMASK[] = "TvSa:l:p:m:c:B:n:R:r:w:H:M:"; #else static const char UDPXY_OPTMASK[] = "TvSa:l:p:m:c:B:n:R:H:M:"; #endif struct sigaction qact, iact, cact, oldact; init_app_info(); (void) get_pidstr( PID_RESET, "S" ); rc = init_uopt( &g_uopt ); while( (0 == rc) && (-1 != (ch = getopt(argc, argv, UDPXY_OPTMASK))) ) { switch( ch ) { case 'v': set_verbose( &g_uopt.is_verbose ); break; case 'T': no_daemon = 1; break; case 'S': g_uopt.cl_tpstat = uf_TRUE; break; case 'a': rc = get_ipv4_address( optarg, ipaddr, sizeof(ipaddr) ); if( 0 != rc ) { (void) fprintf( stderr, "Invalid address: [%s]\n", optarg ); rc = ERR_PARAM; } break; case 'p': port = atoi( optarg ); if( port <= 0 ) { (void) fprintf( stderr, "Invalid port number: [%d]\n", port ); rc = ERR_PARAM; } break; case 'm': rc = get_ipv4_address( optarg, mcast_addr, sizeof(mcast_addr) ); if( 0 != rc ) { (void) fprintf( stderr, "Invalid multicast address: " "[%s]\n", optarg ); rc = ERR_PARAM; } break; case 'c': g_uopt.max_clients = atoi( optarg ); if( (g_uopt.max_clients < MIN_CLIENT_COUNT) || (g_uopt.max_clients > MAX_CLIENT_COUNT) ) { (void) fprintf( stderr, "Client count should be between %d and %d\n", MIN_CLIENT_COUNT, MAX_CLIENT_COUNT ); 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 'B': rc = a2size(optarg, &g_uopt.rbuf_len); if( 0 != rc ) { (void) fprintf( stderr, "Invalid buffer size: [%s]\n", optarg ); exit( ERR_PARAM ); } else if( (g_uopt.rbuf_len < MIN_MCACHE_LEN) || (g_uopt.rbuf_len > MAX_MCACHE_LEN) ) { fprintf(stderr, "Buffer size " "must be within [%ld-%ld] bytes\n", (long)MIN_MCACHE_LEN, (long)MAX_MCACHE_LEN ); rc = ERR_PARAM; } break; case 'n': g_uopt.nice_incr = atoi( optarg ); if( 0 == g_uopt.nice_incr ) { (void) fprintf( stderr, "Invalid nice-value increment: [%s]\n", optarg ); rc = ERR_PARAM; break; } break; case 'R': g_uopt.rbuf_msgs = atoi( optarg ); if( (g_uopt.rbuf_msgs <= 0) && (-1 != g_uopt.rbuf_msgs) ) { (void) fprintf( stderr, "Invalid Rmsgs size: [%s]\n", optarg ); rc = ERR_PARAM; break; } break; case 'H': g_uopt.dhold_tmout = (time_t)atoi( optarg ); if( (0 == g_uopt.dhold_tmout) || ((g_uopt.dhold_tmout) < 0 && (-1 != g_uopt.dhold_tmout)) ) { (void) fprintf( stderr, "Invalid value for max time " "to hold buffered data: [%s]\n", optarg ); rc = ERR_PARAM; break; } break; #ifdef UDPXY_FILEIO case 'r': if( 0 != access(optarg, R_OK) ) { perror("source file - access"); rc = ERR_PARAM; break; } g_uopt.srcfile = strdup( optarg ); break; case 'w': g_uopt.dstfile = strdup( optarg ); break; #endif /* UDPXY_FILEIO */ case 'M': g_uopt.mcast_refresh = (u_short)atoi( optarg ); MIN_MCAST_REFRESH = 30; MAX_MCAST_REFRESH = 64000; if( g_uopt.mcast_refresh && (g_uopt.mcast_refresh < MIN_MCAST_REFRESH || g_uopt.mcast_refresh > MAX_MCAST_REFRESH )) { (void) fprintf( stderr, "Invalid multicast refresh period [%d] seconds, " "min=[%d] sec, max=[%d] sec\n", (int)g_uopt.mcast_refresh, (int)MIN_MCAST_REFRESH, (int)MAX_MCAST_REFRESH ); rc = ERR_PARAM; break; } 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; } } /* while getopt */ if (rc) { free_uopt( &g_uopt ); return rc; } openlog( g_udpxy_app, LOG_CONS | LOG_PID, LOG_LOCAL0 ); do { if( (argc < 2) || (port <= 0) || (rc != 0) ) { usage( argv[0], stderr ); rc = ERR_PARAM; break; } if( '\0' == mcast_addr[0] ) { (void) strncpy( mcast_addr, IPv4_ALL, sizeof(mcast_addr) - 1 ); } if( !custom_log ) { /* in debug mode output goes to stderr, otherwise to /dev/null */ g_flog = ((uf_TRUE == g_uopt.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( 0 != (rc = daemonize(0, g_flog)) ) { rc = ERR_INTERNAL; break; } } rc = set_pidfile( g_udpxy_app, port, pidfile, sizeof(pidfile) ); if( 0 != rc ) { mperror( g_flog, errno, "set_pidfile" ); rc = ERR_INTERNAL; break; } if( 0 != (rc = make_pidfile( pidfile, getpid(), g_flog )) ) break; } qact.sa_handler = handle_quitsigs; sigemptyset(&qact.sa_mask); qact.sa_flags = 0; if( (sigaction(SIGTERM, &qact, &oldact) < 0) || (sigaction(SIGQUIT, &qact, &oldact) < 0) || (sigaction(SIGINT, &qact, &oldact) < 0)) { perror("sigaction-quit"); rc = ERR_INTERNAL; break; } iact.sa_handler = SIG_IGN; sigemptyset(&iact.sa_mask); iact.sa_flags = 0; if( (sigaction(SIGPIPE, &iact, &oldact) < 0) ) { perror("sigaction-ignore"); rc = ERR_INTERNAL; break; } cact.sa_handler = handle_sigchld; sigemptyset(&cact.sa_mask); cact.sa_flags = 0; if( sigaction(SIGCHLD, &cact, &oldact) < 0 ) { perror("sigaction-sigchld"); rc = ERR_INTERNAL; break; } syslog( LOG_NOTICE, "%s is starting\n", g_udpxy_finfo ); TRACE( printcmdln( g_flog, g_udpxy_finfo, argc, argv ) ); rc = srv_loop( ipaddr, port, mcast_addr ); syslog( LOG_NOTICE, "%s is exiting with rc=[%d]\n", g_udpxy_finfo, rc); TRACE( tmfprintf( g_flog, "%s is exiting with rc=[%d]\n", g_udpxy_app, rc ) ); TRACE( printcmdln( g_flog, g_udpxy_finfo, argc, argv ) ); } while(0); if( '\0' != pidfile[0] ) { if( -1 == unlink(pidfile) ) { mperror( g_flog, errno, "unlink [%s]", pidfile ); } } if( g_flog && (stderr != g_flog) ) { (void) fclose(g_flog); } closelog(); free_uopt( &g_uopt ); return rc; }
int main(int argc, char *argv[]) { int ret = -1, pidfd; char *pidfile = NULL, *v = NULL; size_t pidfile_len; /* * what we pass to fuse_main is: * argv[0] -s -f -o allow_other,directio argv[1] NULL */ int nargs = 5, cnt = 0; char *newargv[6]; /* accomodate older init scripts */ swallow_arg(&argc, argv, "-s"); swallow_arg(&argc, argv, "-f"); if (swallow_option(&argc, argv, "-o", &v)) { if (strcmp(v, "allow_other") != 0) { fprintf(stderr, "Warning: unexpected fuse option %s\n", v); exit(1); } free(v); v = NULL; } if (swallow_option(&argc, argv, "-p", &v)) pidfile = v; if (argc == 2 && strcmp(argv[1], "--version") == 0) { fprintf(stderr, "%s\n", VERSION); exit(0); } if (argc != 2 || is_help(argv[1])) usage(argv[0]); do_reload(); signal(SIGUSR1, reload_handler); newargv[cnt++] = argv[0]; newargv[cnt++] = "-f"; newargv[cnt++] = "-o"; newargv[cnt++] = "allow_other,direct_io,entry_timeout=0.5,attr_timeout=0.5"; newargv[cnt++] = argv[1]; newargv[cnt++] = NULL; if (!cgfs_setup_controllers()) goto out; if (!pidfile) { pidfile_len = strlen(RUNTIME_PATH) + strlen("/lxcfs.pid") + 1; pidfile = alloca(pidfile_len); snprintf(pidfile, pidfile_len, "%s/lxcfs.pid", RUNTIME_PATH); } if ((pidfd = set_pidfile(pidfile)) < 0) goto out; ret = fuse_main(nargs, newargv, &lxcfs_ops, NULL); dlclose(dlopen_handle); unlink(pidfile); close(pidfd); out: return ret; }