4.3BSD - /usr/src/new/pathalias/main.c

   1: /* pathalias -- by steve bellovin, as told to peter honeyman */
   2: #ifndef lint
   3: static char *sccsid = "@(#)main.c	8.1 (down!honey) 86/01/19";
   4: #endif
   5: 
   6: #define MAIN    /* for sccsid in header files */
   7: 
   8: #include "def.h"
   9: 
  10: #define USAGE "usage: %s [-vci] [-l localname] [-d deadlink] [-t tracelink] [-g file] [-s file]\n"
  11: 
  12: main(argc, argv)
  13: int argc;
  14: char    *argv[];
  15: {
  16:     char    *locname = 0;
  17:     int c, errflg = 0;
  18: 
  19:     ProgName = argv[0];
  20:     (void) allocation();    /* initialize data space monitoring */
  21:     Cfile = "[deadlinks]";  /* for tracing dead links */
  22:     while ((c = getopt(argc, argv, "cd:g:il:s:t:v")) != EOF)
  23:         switch(c) {
  24:         case 'c':   /* print cost info */
  25:             Cflag++;
  26:             break;
  27:         case 'd':   /* dead host or link */
  28:             deadlink(optarg);
  29:             break;
  30:         case 'g':   /* graph output file */
  31:             Graphout = optarg;
  32:             break;
  33:         case 'i':   /* ignore case */
  34:             Iflag++;
  35:             break;
  36:         case 'l':   /* local name */
  37:             locname = optarg;
  38:             break;
  39:         case 's':   /* show shortest path tree */
  40:             Linkout = optarg;
  41:             break;
  42:         case 't':   /* trace this link */
  43:             if (tracelink(optarg) < 0) {
  44:                 fprintf(stderr, "%s: can trace only %d links\n", ProgName, NTRACE);
  45:                 exit(1);
  46:             }
  47:             Tflag = 1;
  48:             break;
  49:         case 'v':   /* verbose stderr, mixed blessing */
  50:             Vflag++;
  51:             break;
  52:         default:
  53:             errflg++;
  54:         }
  55: 
  56:     if (errflg) {
  57:         fprintf(stderr, USAGE, ProgName);
  58:         exit(1);
  59:     }
  60:     argv += optind;     /* kludge for yywrap() */
  61: 
  62:     if (*argv) {
  63:         Ifiles = argv;
  64:         freopen("/dev/null", "r", stdin);
  65:     }
  66: 
  67:     if (!locname)
  68:         locname = local();
  69:     if (*locname == 0) {
  70:         locname = "lostinspace";
  71:         fprintf(stderr, "%s: using \"%s\" for local name\n",
  72:                 ProgName, locname);
  73:     }
  74: 
  75:     Home = addnode(locname);    /* add home node */
  76:     Home->n_cost = 0;       /* doesn't cost to get here */
  77: 
  78:     yyparse();          /* read in link info */
  79: 
  80:     if (Vflag > 1)
  81:         hashanalyze();
  82:     vprintf(stderr, "%d vertices, %d edges\n", Ncount, Lcount);
  83:     vprintf(stderr, "allocation is %ldk after parsing\n", allocation());
  84: 
  85:     Cfile = "[backlinks]";  /* for tracing back links */
  86:     Lineno = 0;
  87: 
  88:     mapit();            /* compute shortest path tree */
  89:     vprintf(stderr, "allocation is %ldk after mapping\n", allocation());
  90: 
  91:     printit();          /* traverse tree and print paths */
  92:     vprintf(stderr, "allocation is %ldk after printing\n", allocation());
  93: 
  94:     exit(0);
  95: }
  96: 
  97: badmagic(n)
  98: {
  99:     if (n) {
 100:         fprintf(stderr, "%s: cannot recover!\n", ProgName);
 101: #ifdef DEBUG
 102:         abort();
 103: #else
 104:         exit(n);
 105: #endif
 106:     }
 107: }

Defined functions

Defined variables

Defined macros