BSD 4_3 release

[unix-history] / usr / contrib / pathalias / main.c

/* pathalias -- by steve bellovin, as told to peter honeyman */
#ifndef lint
static char     *sccsid = "@(#)main.c   8.1 (down!honey) 86/01/19";
#endif

#define MAIN    /* for sccsid in header files */

#include "def.h"

#define USAGE "usage: %s [-vci] [-l localname] [-d deadlink] [-t tracelink] [-g file] [-s file]\n"

main(argc, argv) 
int     argc; 
char    *argv[];
{
       char    *locname = 0;
       int     c, errflg = 0;

       ProgName = argv[0];
       (void) allocation();    /* initialize data space monitoring */
       Cfile = "[deadlinks]";  /* for tracing dead links */
       while ((c = getopt(argc, argv, "cd:g:il:s:t:v")) != EOF)
               switch(c) {
               case 'c':       /* print cost info */
                       Cflag++;
                       break;
               case 'd':       /* dead host or link */
                       deadlink(optarg);
                       break;
               case 'g':       /* graph output file */
                       Graphout = optarg;
                       break;
               case 'i':       /* ignore case */
                       Iflag++;
                       break;
               case 'l':       /* local name */
                       locname = optarg;
                       break;
               case 's':       /* show shortest path tree */
                       Linkout = optarg;
                       break;
               case 't':       /* trace this link */
                       if (tracelink(optarg) < 0) {
                               fprintf(stderr, "%s: can trace only %d links\n", ProgName, NTRACE);
                               exit(1);
                       }
                       Tflag = 1;
                       break;
               case 'v':       /* verbose stderr, mixed blessing */
                       Vflag++;
                       break;
               default:
                       errflg++;
               }

       if (errflg) {
               fprintf(stderr, USAGE, ProgName);
               exit(1);
       }
       argv += optind;         /* kludge for yywrap() */

       if (*argv) {
               Ifiles = argv;
               freopen("/dev/null", "r", stdin);
       }

       if (!locname) 
               locname = local();
       if (*locname == 0) {
               locname = "lostinspace";
               fprintf(stderr, "%s: using \"%s\" for local name\n",
                               ProgName, locname);
       }

       Home = addnode(locname);        /* add home node */
       Home->n_cost = 0;               /* doesn't cost to get here */

       yyparse();                      /* read in link info */

       if (Vflag > 1)
               hashanalyze();
       vprintf(stderr, "%d vertices, %d edges\n", Ncount, Lcount);
       vprintf(stderr, "allocation is %ldk after parsing\n", allocation());

       Cfile = "[backlinks]";  /* for tracing back links */
       Lineno = 0;

       mapit();                        /* compute shortest path tree */
       vprintf(stderr, "allocation is %ldk after mapping\n", allocation());

       printit();                      /* traverse tree and print paths */
       vprintf(stderr, "allocation is %ldk after printing\n", allocation());

       exit(0);
}

badmagic(n)
{
       if (n) {
               fprintf(stderr, "%s: cannot recover!\n", ProgName);
#ifdef DEBUG
               abort();
#else
               exit(n);
#endif
       }
}