diff --git a/jasspa/macros/r.eaf b/jasspa/macros/r.eaf
index e8177e1..d0e77b1 100644
--- a/jasspa/macros/r.eaf
+++ b/jasspa/macros/r.eaf
@@ -5,7 +5,7 @@ elif "elseif (\p) {\r\r}\P"  "  elif"
 else "else {\r\p}\r\P" "  else"
 while "while (\p) {\r\r}\P" "  while"
 func "\p <- function (...) {\r\r}\P" "  func"
-main "main <- function (argv) {\r\r}\rif (sys.nframe() == 0L && !interactive()) {\r    main(commandArgs(trailingOnly=TRUE))\r}" "  main"
+main "main <- function (argv) {\r    \p\r\B}\rif (sys.nframe() == 0L && !interactive()) {\r   binname=gsub(\"--file=\",\"\",grep(\"--file\",commandArgs(),value=TRUE)[1])\rmain(c(binname,commandArgs(trailingOnly=TRUE)))\r\B}\r\P" "  main"
 openw "fout = file(\"\pfilename\",'w')\rcat(\"hello line\\n\",file=fout)\rclose(fout)\r\P"  "  openw" 
 openr "fin  = file(\"\pfilename\", \"r\")\rwhile(length((line = readLines(fin,n=1)))>0) {\r    print(line)\r}\rclose(fin)" "  openr"
  "" ""