main.c revision 187767
1187767Sluigi/* 2187767Sluigi * Copyright (c) 2002-2003 Luigi Rizzo 3187767Sluigi * Copyright (c) 1996 Alex Nash, Paul Traina, Poul-Henning Kamp 4187767Sluigi * Copyright (c) 1994 Ugen J.S.Antsilevich 5187767Sluigi * 6187767Sluigi * Idea and grammar partially left from: 7187767Sluigi * Copyright (c) 1993 Daniel Boulet 8187767Sluigi * 9187767Sluigi * Redistribution and use in source forms, with and without modification, 10187767Sluigi * are permitted provided that this entire comment appears intact. 11187767Sluigi * 12187767Sluigi * Redistribution in binary form may occur without any restrictions. 13187767Sluigi * Obviously, it would be nice if you gave credit where credit is due 14187767Sluigi * but requiring it would be too onerous. 15187767Sluigi * 16187767Sluigi * This software is provided ``AS IS'' without any warranties of any kind. 17187767Sluigi * 18187767Sluigi * Command line interface for IP firewall facility 19187767Sluigi * 20187767Sluigi * $FreeBSD: head/sbin/ipfw/main.c 187767 2009-01-27 10:18:55Z luigi $ 21187767Sluigi */ 22187767Sluigi 23187767Sluigi#include <sys/wait.h> 24187767Sluigi#include <ctype.h> 25187767Sluigi#include <err.h> 26187767Sluigi#include <errno.h> 27187767Sluigi#include <signal.h> 28187767Sluigi#include <stdio.h> 29187767Sluigi#include <stdlib.h> 30187767Sluigi#include <string.h> 31187767Sluigi#include <sysexits.h> 32187767Sluigi#include <unistd.h> 33187767Sluigi 34187767Sluigi#include "ipfw2.h" 35187767Sluigi 36187767Sluigistatic void 37187767Sluigihelp(void) 38187767Sluigi{ 39187767Sluigi fprintf(stderr, 40187767Sluigi"ipfw syntax summary (but please do read the ipfw(8) manpage):\n\n" 41187767Sluigi"\tipfw [-abcdefhnNqStTv] <command>\n\n" 42187767Sluigi"where <command> is one of the following:\n\n" 43187767Sluigi"add [num] [set N] [prob x] RULE-BODY\n" 44187767Sluigi"{pipe|queue} N config PIPE-BODY\n" 45187767Sluigi"[pipe|queue] {zero|delete|show} [N{,N}]\n" 46187767Sluigi"nat N config {ip IPADDR|if IFNAME|log|deny_in|same_ports|unreg_only|reset|\n" 47187767Sluigi" reverse|proxy_only|redirect_addr linkspec|\n" 48187767Sluigi" redirect_port linkspec|redirect_proto linkspec}\n" 49187767Sluigi"set [disable N... enable N...] | move [rule] X to Y | swap X Y | show\n" 50187767Sluigi"set N {show|list|zero|resetlog|delete} [N{,N}] | flush\n" 51187767Sluigi"table N {add ip[/bits] [value] | delete ip[/bits] | flush | list}\n" 52187767Sluigi"table all {flush | list}\n" 53187767Sluigi"\n" 54187767Sluigi"RULE-BODY: check-state [PARAMS] | ACTION [PARAMS] ADDR [OPTION_LIST]\n" 55187767Sluigi"ACTION: check-state | allow | count | deny | unreach{,6} CODE |\n" 56187767Sluigi" skipto N | {divert|tee} PORT | forward ADDR |\n" 57187767Sluigi" pipe N | queue N | nat N | setfib FIB\n" 58187767Sluigi"PARAMS: [log [logamount LOGLIMIT]] [altq QUEUE_NAME]\n" 59187767Sluigi"ADDR: [ MAC dst src ether_type ] \n" 60187767Sluigi" [ ip from IPADDR [ PORT ] to IPADDR [ PORTLIST ] ]\n" 61187767Sluigi" [ ipv6|ip6 from IP6ADDR [ PORT ] to IP6ADDR [ PORTLIST ] ]\n" 62187767Sluigi"IPADDR: [not] { any | me | ip/bits{x,y,z} | table(t[,v]) | IPLIST }\n" 63187767Sluigi"IP6ADDR: [not] { any | me | me6 | ip6/bits | IP6LIST }\n" 64187767Sluigi"IP6LIST: { ip6 | ip6/bits }[,IP6LIST]\n" 65187767Sluigi"IPLIST: { ip | ip/bits | ip:mask }[,IPLIST]\n" 66187767Sluigi"OPTION_LIST: OPTION [OPTION_LIST]\n" 67187767Sluigi"OPTION: bridged | diverted | diverted-loopback | diverted-output |\n" 68187767Sluigi" {dst-ip|src-ip} IPADDR | {dst-ip6|src-ip6|dst-ipv6|src-ipv6} IP6ADDR |\n" 69187767Sluigi" {dst-port|src-port} LIST |\n" 70187767Sluigi" estab | frag | {gid|uid} N | icmptypes LIST | in | out | ipid LIST |\n" 71187767Sluigi" iplen LIST | ipoptions SPEC | ipprecedence | ipsec | iptos SPEC |\n" 72187767Sluigi" ipttl LIST | ipversion VER | keep-state | layer2 | limit ... |\n" 73187767Sluigi" icmp6types LIST | ext6hdr LIST | flow-id N[,N] | fib FIB |\n" 74187767Sluigi" mac ... | mac-type LIST | proto LIST | {recv|xmit|via} {IF|IPADDR} |\n" 75187767Sluigi" setup | {tcpack|tcpseq|tcpwin} NN | tcpflags SPEC | tcpoptions SPEC |\n" 76187767Sluigi" tcpdatalen LIST | verrevpath | versrcreach | antispoof\n" 77187767Sluigi); 78187767Sluigi 79187767Sluigi exit(0); 80187767Sluigi} 81187767Sluigi 82187767Sluigi/* 83187767Sluigi * Free a the (locally allocated) copy of command line arguments. 84187767Sluigi */ 85187767Sluigistatic void 86187767Sluigifree_args(int ac, char **av) 87187767Sluigi{ 88187767Sluigi int i; 89187767Sluigi 90187767Sluigi for (i=0; i < ac; i++) 91187767Sluigi free(av[i]); 92187767Sluigi free(av); 93187767Sluigi} 94187767Sluigi 95187767Sluigi/* 96187767Sluigi * Called with the arguments, including program name because getopt 97187767Sluigi * wants it to be present. 98187767Sluigi * Returns 0 if successful, 1 if empty command, errx() in case of errors. 99187767Sluigi */ 100187767Sluigistatic int 101187767Sluigiipfw_main(int oldac, char **oldav) 102187767Sluigi{ 103187767Sluigi int ch, ac, save_ac; 104187767Sluigi const char *errstr; 105187767Sluigi char **av, **save_av; 106187767Sluigi int do_acct = 0; /* Show packet/byte count */ 107187767Sluigi 108187767Sluigi#define WHITESP " \t\f\v\n\r" 109187767Sluigi if (oldac < 2) 110187767Sluigi return 1; /* need at least one argument */ 111187767Sluigi 112187767Sluigi if (oldac == 2) { 113187767Sluigi /* 114187767Sluigi * If we are called with a single string, try to split it into 115187767Sluigi * arguments for subsequent parsing. 116187767Sluigi * But first, remove spaces after a ',', by copying the string 117187767Sluigi * in-place. 118187767Sluigi */ 119187767Sluigi char *arg = oldav[1]; /* The string is the first arg. */ 120187767Sluigi int l = strlen(arg); 121187767Sluigi int copy = 0; /* 1 if we need to copy, 0 otherwise */ 122187767Sluigi int i, j; 123187767Sluigi 124187767Sluigi for (i = j = 0; i < l; i++) { 125187767Sluigi if (arg[i] == '#') /* comment marker */ 126187767Sluigi break; 127187767Sluigi if (copy) { 128187767Sluigi arg[j++] = arg[i]; 129187767Sluigi copy = !index("," WHITESP, arg[i]); 130187767Sluigi } else { 131187767Sluigi copy = !index(WHITESP, arg[i]); 132187767Sluigi if (copy) 133187767Sluigi arg[j++] = arg[i]; 134187767Sluigi } 135187767Sluigi } 136187767Sluigi if (!copy && j > 0) /* last char was a 'blank', remove it */ 137187767Sluigi j--; 138187767Sluigi l = j; /* the new argument length */ 139187767Sluigi arg[j++] = '\0'; 140187767Sluigi if (l == 0) /* empty string! */ 141187767Sluigi return 1; 142187767Sluigi 143187767Sluigi /* 144187767Sluigi * First, count number of arguments. Because of the previous 145187767Sluigi * processing, this is just the number of blanks plus 1. 146187767Sluigi */ 147187767Sluigi for (i = 0, ac = 1; i < l; i++) 148187767Sluigi if (index(WHITESP, arg[i]) != NULL) 149187767Sluigi ac++; 150187767Sluigi 151187767Sluigi /* 152187767Sluigi * Allocate the argument list, including one entry for 153187767Sluigi * the program name because getopt expects it. 154187767Sluigi */ 155187767Sluigi av = safe_calloc(ac + 1, sizeof(char *)); 156187767Sluigi 157187767Sluigi /* 158187767Sluigi * Second, copy arguments from arg[] to av[]. For each one, 159187767Sluigi * j is the initial character, i is the one past the end. 160187767Sluigi */ 161187767Sluigi for (ac = 1, i = j = 0; i < l; i++) 162187767Sluigi if (index(WHITESP, arg[i]) != NULL || i == l-1) { 163187767Sluigi if (i == l-1) 164187767Sluigi i++; 165187767Sluigi av[ac] = safe_calloc(i-j+1, 1); 166187767Sluigi bcopy(arg+j, av[ac], i-j); 167187767Sluigi ac++; 168187767Sluigi j = i + 1; 169187767Sluigi } 170187767Sluigi } else { 171187767Sluigi /* 172187767Sluigi * If an argument ends with ',' join with the next one. 173187767Sluigi */ 174187767Sluigi int first, i, l; 175187767Sluigi 176187767Sluigi av = safe_calloc(oldac, sizeof(char *)); 177187767Sluigi for (first = i = ac = 1, l = 0; i < oldac; i++) { 178187767Sluigi char *arg = oldav[i]; 179187767Sluigi int k = strlen(arg); 180187767Sluigi 181187767Sluigi l += k; 182187767Sluigi if (arg[k-1] != ',' || i == oldac-1) { 183187767Sluigi /* Time to copy. */ 184187767Sluigi av[ac] = safe_calloc(l+1, 1); 185187767Sluigi for (l=0; first <= i; first++) { 186187767Sluigi strcat(av[ac]+l, oldav[first]); 187187767Sluigi l += strlen(oldav[first]); 188187767Sluigi } 189187767Sluigi ac++; 190187767Sluigi l = 0; 191187767Sluigi first = i+1; 192187767Sluigi } 193187767Sluigi } 194187767Sluigi } 195187767Sluigi 196187767Sluigi av[0] = strdup(oldav[0]); /* copy progname from the caller */ 197187767Sluigi /* Set the force flag for non-interactive processes */ 198187767Sluigi if (!co.do_force) 199187767Sluigi co.do_force = !isatty(STDIN_FILENO); 200187767Sluigi 201187767Sluigi /* Save arguments for final freeing of memory. */ 202187767Sluigi save_ac = ac; 203187767Sluigi save_av = av; 204187767Sluigi 205187767Sluigi optind = optreset = 1; /* restart getopt() */ 206187767Sluigi while ((ch = getopt(ac, av, "abcdefhinNqs:STtv")) != -1) 207187767Sluigi switch (ch) { 208187767Sluigi case 'a': 209187767Sluigi do_acct = 1; 210187767Sluigi break; 211187767Sluigi 212187767Sluigi case 'b': 213187767Sluigi co.comment_only = 1; 214187767Sluigi co.do_compact = 1; 215187767Sluigi break; 216187767Sluigi 217187767Sluigi case 'c': 218187767Sluigi co.do_compact = 1; 219187767Sluigi break; 220187767Sluigi 221187767Sluigi case 'd': 222187767Sluigi co.do_dynamic = 1; 223187767Sluigi break; 224187767Sluigi 225187767Sluigi case 'e': 226187767Sluigi co.do_expired = 1; 227187767Sluigi break; 228187767Sluigi 229187767Sluigi case 'f': 230187767Sluigi co.do_force = 1; 231187767Sluigi break; 232187767Sluigi 233187767Sluigi case 'h': /* help */ 234187767Sluigi free_args(save_ac, save_av); 235187767Sluigi help(); 236187767Sluigi break; /* NOTREACHED */ 237187767Sluigi 238187767Sluigi case 'i': 239187767Sluigi co.do_value_as_ip = 1; 240187767Sluigi break; 241187767Sluigi 242187767Sluigi case 'n': 243187767Sluigi co.test_only = 1; 244187767Sluigi break; 245187767Sluigi 246187767Sluigi case 'N': 247187767Sluigi co.do_resolv = 1; 248187767Sluigi break; 249187767Sluigi 250187767Sluigi case 'q': 251187767Sluigi co.do_quiet = 1; 252187767Sluigi break; 253187767Sluigi 254187767Sluigi case 's': /* sort */ 255187767Sluigi co.do_sort = atoi(optarg); 256187767Sluigi break; 257187767Sluigi 258187767Sluigi case 'S': 259187767Sluigi co.show_sets = 1; 260187767Sluigi break; 261187767Sluigi 262187767Sluigi case 't': 263187767Sluigi co.do_time = 1; 264187767Sluigi break; 265187767Sluigi 266187767Sluigi case 'T': 267187767Sluigi co.do_time = 2; /* numeric timestamp */ 268187767Sluigi break; 269187767Sluigi 270187767Sluigi case 'v': /* verbose */ 271187767Sluigi co.verbose = 1; 272187767Sluigi break; 273187767Sluigi 274187767Sluigi default: 275187767Sluigi free_args(save_ac, save_av); 276187767Sluigi return 1; 277187767Sluigi } 278187767Sluigi 279187767Sluigi ac -= optind; 280187767Sluigi av += optind; 281187767Sluigi NEED1("bad arguments, for usage summary ``ipfw''"); 282187767Sluigi 283187767Sluigi /* 284187767Sluigi * An undocumented behaviour of ipfw1 was to allow rule numbers first, 285187767Sluigi * e.g. "100 add allow ..." instead of "add 100 allow ...". 286187767Sluigi * In case, swap first and second argument to get the normal form. 287187767Sluigi */ 288187767Sluigi if (ac > 1 && isdigit(*av[0])) { 289187767Sluigi char *p = av[0]; 290187767Sluigi 291187767Sluigi av[0] = av[1]; 292187767Sluigi av[1] = p; 293187767Sluigi } 294187767Sluigi 295187767Sluigi /* 296187767Sluigi * Optional: pipe, queue or nat. 297187767Sluigi */ 298187767Sluigi co.do_nat = 0; 299187767Sluigi co.do_pipe = 0; 300187767Sluigi if (!strncmp(*av, "nat", strlen(*av))) 301187767Sluigi co.do_nat = 1; 302187767Sluigi else if (!strncmp(*av, "pipe", strlen(*av))) 303187767Sluigi co.do_pipe = 1; 304187767Sluigi else if (_substrcmp(*av, "queue") == 0) 305187767Sluigi co.do_pipe = 2; 306187767Sluigi else if (!strncmp(*av, "set", strlen(*av))) { 307187767Sluigi if (ac > 1 && isdigit(av[1][0])) { 308187767Sluigi co.use_set = strtonum(av[1], 0, resvd_set_number, 309187767Sluigi &errstr); 310187767Sluigi if (errstr) 311187767Sluigi errx(EX_DATAERR, 312187767Sluigi "invalid set number %s\n", av[1]); 313187767Sluigi ac -= 2; av += 2; co.use_set++; 314187767Sluigi } 315187767Sluigi } 316187767Sluigi 317187767Sluigi if (co.do_pipe || co.do_nat) { 318187767Sluigi ac--; 319187767Sluigi av++; 320187767Sluigi } 321187767Sluigi NEED1("missing command"); 322187767Sluigi 323187767Sluigi /* 324187767Sluigi * For pipes, queues and nats we normally say 'nat|pipe NN config' 325187767Sluigi * but the code is easier to parse as 'nat|pipe config NN' 326187767Sluigi * so we swap the two arguments. 327187767Sluigi */ 328187767Sluigi if ((co.do_pipe || co.do_nat) && ac > 1 && isdigit(*av[0])) { 329187767Sluigi char *p = av[0]; 330187767Sluigi 331187767Sluigi av[0] = av[1]; 332187767Sluigi av[1] = p; 333187767Sluigi } 334187767Sluigi 335187767Sluigi int try_next = 0; 336187767Sluigi if (co.use_set == 0) { 337187767Sluigi if (_substrcmp(*av, "add") == 0) 338187767Sluigi ipfw_add(ac, av); 339187767Sluigi else if (co.do_nat && _substrcmp(*av, "show") == 0) 340187767Sluigi ipfw_show_nat(ac, av); 341187767Sluigi else if (co.do_pipe && _substrcmp(*av, "config") == 0) 342187767Sluigi ipfw_config_pipe(ac, av); 343187767Sluigi else if (co.do_nat && _substrcmp(*av, "config") == 0) 344187767Sluigi ipfw_config_nat(ac, av); 345187767Sluigi else if (_substrcmp(*av, "set") == 0) 346187767Sluigi ipfw_sets_handler(ac, av); 347187767Sluigi else if (_substrcmp(*av, "table") == 0) 348187767Sluigi ipfw_table_handler(ac, av); 349187767Sluigi else if (_substrcmp(*av, "enable") == 0) 350187767Sluigi ipfw_sysctl_handler(ac, av, 1); 351187767Sluigi else if (_substrcmp(*av, "disable") == 0) 352187767Sluigi ipfw_sysctl_handler(ac, av, 0); 353187767Sluigi else 354187767Sluigi try_next = 1; 355187767Sluigi } 356187767Sluigi 357187767Sluigi if (co.use_set || try_next) { 358187767Sluigi if (_substrcmp(*av, "delete") == 0) 359187767Sluigi ipfw_delete(ac, av); 360187767Sluigi else if (_substrcmp(*av, "flush") == 0) 361187767Sluigi ipfw_flush(co.do_force); 362187767Sluigi else if (_substrcmp(*av, "zero") == 0) 363187767Sluigi ipfw_zero(ac, av, 0 /* IP_FW_ZERO */); 364187767Sluigi else if (_substrcmp(*av, "resetlog") == 0) 365187767Sluigi ipfw_zero(ac, av, 1 /* IP_FW_RESETLOG */); 366187767Sluigi else if (_substrcmp(*av, "print") == 0 || 367187767Sluigi _substrcmp(*av, "list") == 0) 368187767Sluigi ipfw_list(ac, av, do_acct); 369187767Sluigi else if (_substrcmp(*av, "show") == 0) 370187767Sluigi ipfw_list(ac, av, 1 /* show counters */); 371187767Sluigi else 372187767Sluigi errx(EX_USAGE, "bad command `%s'", *av); 373187767Sluigi } 374187767Sluigi 375187767Sluigi /* Free memory allocated in the argument parsing. */ 376187767Sluigi free_args(save_ac, save_av); 377187767Sluigi return 0; 378187767Sluigi} 379187767Sluigi 380187767Sluigi 381187767Sluigistatic void 382187767Sluigiipfw_readfile(int ac, char *av[]) 383187767Sluigi{ 384187767Sluigi#define MAX_ARGS 32 385187767Sluigi char buf[BUFSIZ]; 386187767Sluigi char *progname = av[0]; /* original program name */ 387187767Sluigi const char *cmd = NULL; /* preprocessor name, if any */ 388187767Sluigi const char *filename = av[ac-1]; /* file to read */ 389187767Sluigi int c, lineno=0; 390187767Sluigi FILE *f = NULL; 391187767Sluigi pid_t preproc = 0; 392187767Sluigi 393187767Sluigi while ((c = getopt(ac, av, "cfNnp:qS")) != -1) { 394187767Sluigi switch(c) { 395187767Sluigi case 'c': 396187767Sluigi co.do_compact = 1; 397187767Sluigi break; 398187767Sluigi 399187767Sluigi case 'f': 400187767Sluigi co.do_force = 1; 401187767Sluigi break; 402187767Sluigi 403187767Sluigi case 'N': 404187767Sluigi co.do_resolv = 1; 405187767Sluigi break; 406187767Sluigi 407187767Sluigi case 'n': 408187767Sluigi co.test_only = 1; 409187767Sluigi break; 410187767Sluigi 411187767Sluigi case 'p': 412187767Sluigi /* 413187767Sluigi * ipfw -p cmd [args] filename 414187767Sluigi * 415187767Sluigi * We are done with getopt(). All arguments 416187767Sluigi * except the filename go to the preprocessor, 417187767Sluigi * so we need to do the following: 418187767Sluigi * - check that a filename is actually present; 419187767Sluigi * - advance av by optind-1 to skip arguments 420187767Sluigi * already processed; 421187767Sluigi * - decrease ac by optind, to remove the args 422187767Sluigi * already processed and the final filename; 423187767Sluigi * - set the last entry in av[] to NULL so 424187767Sluigi * popen() can detect the end of the array; 425187767Sluigi * - set optind=ac to let getopt() terminate. 426187767Sluigi */ 427187767Sluigi if (optind == ac) 428187767Sluigi errx(EX_USAGE, "no filename argument"); 429187767Sluigi cmd = optarg; 430187767Sluigi av[ac-1] = NULL; 431187767Sluigi av += optind - 1; 432187767Sluigi ac -= optind; 433187767Sluigi optind = ac; 434187767Sluigi break; 435187767Sluigi 436187767Sluigi case 'q': 437187767Sluigi co.do_quiet = 1; 438187767Sluigi break; 439187767Sluigi 440187767Sluigi case 'S': 441187767Sluigi co.show_sets = 1; 442187767Sluigi break; 443187767Sluigi 444187767Sluigi default: 445187767Sluigi errx(EX_USAGE, "bad arguments, for usage" 446187767Sluigi " summary ``ipfw''"); 447187767Sluigi } 448187767Sluigi 449187767Sluigi } 450187767Sluigi 451187767Sluigi if (cmd == NULL && ac != optind + 1) 452187767Sluigi errx(EX_USAGE, "extraneous filename arguments %s", av[ac-1]); 453187767Sluigi 454187767Sluigi if ((f = fopen(filename, "r")) == NULL) 455187767Sluigi err(EX_UNAVAILABLE, "fopen: %s", filename); 456187767Sluigi 457187767Sluigi if (cmd != NULL) { /* pipe through preprocessor */ 458187767Sluigi int pipedes[2]; 459187767Sluigi 460187767Sluigi if (pipe(pipedes) == -1) 461187767Sluigi err(EX_OSERR, "cannot create pipe"); 462187767Sluigi 463187767Sluigi preproc = fork(); 464187767Sluigi if (preproc == -1) 465187767Sluigi err(EX_OSERR, "cannot fork"); 466187767Sluigi 467187767Sluigi if (preproc == 0) { 468187767Sluigi /* 469187767Sluigi * Child, will run the preprocessor with the 470187767Sluigi * file on stdin and the pipe on stdout. 471187767Sluigi */ 472187767Sluigi if (dup2(fileno(f), 0) == -1 473187767Sluigi || dup2(pipedes[1], 1) == -1) 474187767Sluigi err(EX_OSERR, "dup2()"); 475187767Sluigi fclose(f); 476187767Sluigi close(pipedes[1]); 477187767Sluigi close(pipedes[0]); 478187767Sluigi execvp(cmd, av); 479187767Sluigi err(EX_OSERR, "execvp(%s) failed", cmd); 480187767Sluigi } else { /* parent, will reopen f as the pipe */ 481187767Sluigi fclose(f); 482187767Sluigi close(pipedes[1]); 483187767Sluigi if ((f = fdopen(pipedes[0], "r")) == NULL) { 484187767Sluigi int savederrno = errno; 485187767Sluigi 486187767Sluigi (void)kill(preproc, SIGTERM); 487187767Sluigi errno = savederrno; 488187767Sluigi err(EX_OSERR, "fdopen()"); 489187767Sluigi } 490187767Sluigi } 491187767Sluigi } 492187767Sluigi 493187767Sluigi while (fgets(buf, BUFSIZ, f)) { /* read commands */ 494187767Sluigi char linename[10]; 495187767Sluigi char *args[2]; 496187767Sluigi 497187767Sluigi lineno++; 498187767Sluigi sprintf(linename, "Line %d", lineno); 499187767Sluigi setprogname(linename); /* XXX */ 500187767Sluigi args[0] = progname; 501187767Sluigi args[1] = buf; 502187767Sluigi ipfw_main(2, args); 503187767Sluigi } 504187767Sluigi fclose(f); 505187767Sluigi if (cmd != NULL) { 506187767Sluigi int status; 507187767Sluigi 508187767Sluigi if (waitpid(preproc, &status, 0) == -1) 509187767Sluigi errx(EX_OSERR, "waitpid()"); 510187767Sluigi if (WIFEXITED(status) && WEXITSTATUS(status) != EX_OK) 511187767Sluigi errx(EX_UNAVAILABLE, 512187767Sluigi "preprocessor exited with status %d", 513187767Sluigi WEXITSTATUS(status)); 514187767Sluigi else if (WIFSIGNALED(status)) 515187767Sluigi errx(EX_UNAVAILABLE, 516187767Sluigi "preprocessor exited with signal %d", 517187767Sluigi WTERMSIG(status)); 518187767Sluigi } 519187767Sluigi} 520187767Sluigi 521187767Sluigiint 522187767Sluigimain(int ac, char *av[]) 523187767Sluigi{ 524187767Sluigi /* 525187767Sluigi * If the last argument is an absolute pathname, interpret it 526187767Sluigi * as a file to be preprocessed. 527187767Sluigi */ 528187767Sluigi 529187767Sluigi if (ac > 1 && av[ac - 1][0] == '/' && access(av[ac - 1], R_OK) == 0) 530187767Sluigi ipfw_readfile(ac, av); 531187767Sluigi else { 532187767Sluigi if (ipfw_main(ac, av)) { 533187767Sluigi errx(EX_USAGE, 534187767Sluigi "usage: ipfw [options]\n" 535187767Sluigi "do \"ipfw -h\" or \"man ipfw\" for details"); 536187767Sluigi } 537187767Sluigi } 538187767Sluigi return EX_OK; 539187767Sluigi} 540