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// Tee.cmm  Send lines to screen and to output file 
 
 
main(argc,argv) 
{ 
   if ( 2 != argc ) 
      Instructions(); 
   else { 
      // open ouput file 
      if ( NULL == (fp=fopen(argv[1],"w")) ) 
         printf("Could not open file \"%s\" for writing.\a\n",argv[1]) 
      else { 
         // read in each line, and send to file and screen 
         while ( NULL != (line=gets()) ) { 
            printf("%s\n",line) 
            fprintf(fp,"%s\n",line) 
         } 
         fclose(fp) 
      } 
   } 
} 
 
 
Instructions() 
{ 
   printf("Tee.cmm - Pipe output to screen AND to a file\n"); 
   printf("USAGE: Tee.cmm \n"); 
   printf("  Where:  FileSpec = Name of file to create and write text to\n"); 
   printf("Example: To see output of a dir listing, but also save it in a file:\n"); 
   printf("     dir | cenvi tee.cmm dir.txt\n"); 
}