C Function Problem for bytea output

hi all,

I am trying to read a file from the File System.
The function compiles fine, the function is created fine in postgres but the
output is NULL/BLANK.
The file does exists and has chmod 777 permission.

PG_FUNCTION_INFO_V1(file_export);

Datum file_export(PG_FUNCTION_ARGS)
{
char *FilePath = PG_GETARG_CSTRING(0);
int32 FileLength = PG_GETARG_INT32(1);
FILE *fptr;
bytea *imdata;
char *rp;

imdata = (bytea *) palloc(FileLength+VARHDRSZ);
VARATT_SIZEP(imdata) = FileLength+VARHDRSZ;
rp = VARDATA(imdata);
if ((fptr = fopen(FilePath, "r")) == NULL)
PG_RETURN_NULL();
while (!feof(fptr))
{
fgets(rp,1024,fptr);
rp+=1024;
}
fclose(fptr);

PG_RETURN_BYTEA_P(imdata);
}

select * from file_export('/ResourceFS/Alarm_Arm.gif',1219);
file_export
-------------

(1 row)

I believe its something in the function but i can't spot the error.

thanks,
vish