lytraversal.c

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#include "HTUtils.h"
#include "tcp.h"
#include "LYGlobalDefs.h"
#include "LYUtils.h"
#include "LYSignal.h"
#include "LYTraversal.h"

#include "LYexit.h"
#include "LYLeaks.h"

/* routines to handle special traversal feature */

PUBLIC BOOLEAN lookup ARGS1(char *,target)
{
    FILE *ifp;
    char buffer[200], line[200];

    if ((ifp = fopen(TRAVERSE_FILE,"r")) == NULL) {
        if ((ifp = LYNewTxtFile(TRAVERSE_FILE)) == NULL) {
            perror("unable to open or create a traversal file");
#ifndef NOSIGHUP
	    (void) signal(SIGHUP, SIG_DFL);
#endif /* NOSIGHUP */
	    (void) signal(SIGTERM, SIG_DFL);
#ifndef VMS
	    (void) signal(SIGINT, SIG_DFL);
#endif /* !VMS */
#ifdef SIGTSTP
	    if (no_suspend)
	        (void) signal(SIGTSTP,SIG_DFL);
#endif /* SIGTSTP */
            exit(-1);
	} else {
            fclose(ifp);
            return(FALSE);
        }
    }

    sprintf(line,"%s\n",target);

    while(fgets(buffer, 200, ifp) != NULL) {
	if (STREQ(line,buffer)) {
	    fclose(ifp);
	    return(TRUE);
	}
    } /* end while */

    fclose(ifp);
    return(FALSE);
}

PUBLIC void add_to_table ARGS1(char *,target)
{

    FILE *ifp;

    if ((ifp = LYAppendToTxtFile(TRAVERSE_FILE)) == NULL) {
	perror("unable to open traversal file");
#ifndef NOSIGHUP
	(void) signal(SIGHUP, SIG_DFL);
#endif /* NOSIGHUP */
	(void) signal(SIGTERM, SIG_DFL);
#ifndef VMS
	(void) signal(SIGINT, SIG_DFL);
#endif /* !VMS */
#ifdef SIGTSTP
	if (no_suspend)
	    (void) signal(SIGTSTP,SIG_DFL);
#endif /* SIGTSTP */
	exit(-1);
    }

    fprintf(ifp,"%s\n",target);

    fclose(ifp);
}

PUBLIC void add_to_traverse_list ARGS2(char *,fname, char *,prev_link_name)
{

    FILE *ifp;

    if ((ifp = LYAppendToTxtFile(TRAVERSE_FOUND_FILE)) == NULL) {
	perror("unable to open traversal found file");
#ifndef NOSIGHUP
	(void) signal(SIGHUP, SIG_DFL);
#endif /* NOSIGHUP */
	(void) signal(SIGTERM, SIG_DFL);
#ifndef VMS
	(void) signal(SIGINT, SIG_DFL);
#endif /* !VMS */
#ifdef SIGTSTP
	if (no_suspend)
	    (void) signal(SIGTSTP,SIG_DFL);
#endif /* SIGTSTP */
	exit(-1);
    }

    fprintf(ifp,"%s\t%s\n",fname, prev_link_name);

    fclose(ifp);
}

PUBLIC void dump_traversal_history NOARGS
{
    int x;
    FILE *ifp;

    if (nhist <= 0)
        return;

    if ((ifp = LYAppendToTxtFile(TRAVERSE_FILE)) == NULL) {
        perror("unable to open traversal file");
	return;
    }

    fprintf(ifp, "\n\nTRAVERSAL WAS INTERUPTED\n\n\
\t    here is a list of the history stack so that you may rebuild\n\n");

    for (x = nhist-1; x >= 0; x--) {
	fprintf(ifp,"%s\t%s\n", history[x].title, history[x].address);
    }

    fclose(ifp);
}

PUBLIC void add_to_reject_list ARGS1(char *,target)
{

    FILE *ifp;

    if ((ifp = LYAppendToTxtFile(TRAVERSE_REJECT_FILE)) == NULL) {
	perror("unable to open reject file");
#ifndef NOSIGHUP
	(void) signal(SIGHUP, SIG_DFL);
#endif /* NOSIGHUP */
	(void) signal(SIGTERM, SIG_DFL);
#ifndef VMS
	(void) signal(SIGINT, SIG_DFL);
#endif /* !VMS */
#ifdef SIGTSTP
	if (no_suspend)
	    (void) signal(SIGTSTP,SIG_DFL);
#endif /* SIGTSTP */
	exit(-1);
    }

    fprintf(ifp,"%s\n",target);

    fclose(ifp);
}

/* there need not be a reject file, so if it doesn't open, just return
   FALSE, meaning "target not in reject file" If the last character in
   a line in a reject file is "*", then also reject if target matches up to
   that point in the string
   Blank lines are ignored
   Lines that contain just a * are allowed, but since they mean "reject
   everything" it shouldn't come up much!
 */

PUBLIC BOOLEAN lookup_reject ARGS1(char *,target)
{
    FILE *ifp;
    char buffer[200], line[200], ch;
    int  frag;

    if ((ifp = fopen(TRAVERSE_REJECT_FILE,"r")) == NULL){
        return(FALSE);
    }

    sprintf(line,"%s\n",target);

    while (fgets(buffer, 200, ifp) != NULL) {
	frag = strlen(buffer) - 1; /* real length, minus trailing null */
	ch   = buffer[frag - 1];   /* last character in buffer */
	if (frag > 0) {            /* if not an empty line */
	    if (ch == '*') {
	        if (frag == 1 || ((strncmp(line,buffer,frag - 1)) == 0)) {
	           fclose(ifp);
	           return(TRUE);
	        }
	    } else { /* last character = "*" test */
	        if (STREQ(line,buffer)) {
	            fclose(ifp);
	            return(TRUE);
	        }
	    } /* last character = "*" test */
	} /* frag >= 0 */
    } /* end while */

    fclose(ifp);
    return(FALSE);
}