int
main( int argc, char *argv[] ) {

	/* uses getopts to check for "b:t:" optstring then
	 * comes here.
	 */ 

	for ( int i = 0; i < argc; i++ ) {
		fp = fopen( argv[i], "r" );
		if ( fp == NULL )
			err( 1, "File does not exist or could not be opened "
			"for reading -- %s", optarg );
	}
	/* When no optionss given it calls readall */
}

static void 
readall( FILE *fp, int lncnt ) {

	while ( (lncnt = fgetc( fp )) != EOF ) {
		printf( "%c", lncnt );
	}
}
_________________
Here is my setup

Terry@Dixie$ echo $PATH                                                    8:56
/usr/home/Terry/sh:/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin
Terry@Dixie$ which rf                                                      8:56
/usr/home/Terry/sh/rf
Terry@Dixie$ ls | grep *.c                                                 8:56
Style_Guide.c
Style_Guide.c_bak
Terry@Dixie$ rf Style_Guide.c                                              8:56
rf: File does not exist or could not be opened for reading -- (null): No such file or directory

If I run it through my debugger and set args to Style_Guide.c it reads the file out as normal. If I use ether

$ ~/sh/rf Style_Guide.c 

it works just fine.

~/sh holds personal shell scripts and binaries.