/* check.c - checks stdin for equality with a given file,
reports filename to logfile if not equal */

#include <stdio.h>
#include <stdlib.h>
#ifndef unix
#include <io.h>
#include <fcntl.h>
#endif

void usage()
{	fprintf(stderr,"check <otherfile> <logfile>\n");
	exit(2);
}


void bugfound(char *filename, char *logfilename)
{   FILE *logfil;
    logfil = fopen( logfilename, "ab" );
    fprintf(logfil,"%s\n",filename);
    fclose(logfil);
    exit(1);
}

int main( int argc, char *argv[] )
{   FILE *infil;
    int ch;
    if (argc!=3) usage();

    infil = fopen( argv[1], "rb" );
    if (infil==NULL) bugfound(argv[1],argv[2]);


#ifndef unix
    setmode( fileno( infil ), O_BINARY );
    setmode( fileno( stdin ), O_BINARY );
#endif

    while ((ch=getchar()) != EOF)
        if (getc(infil) != ch)
        {   fclose(infil);
            bugfound(argv[1],argv[2]);
        }
    if (getc(infil) != EOF)
        {   fclose(infil);
            bugfound(argv[1],argv[2]);
        }
    return 0;
}