Use the following root program to pass the command line and its length to your main program:
identification division. program-id. root. environment division. configuration section. source-computer. cobol2. working-storage section. 01 main-linkage. 03 cmd-length pic 9(4) binary value 0. 03 cmd-line pic x(100). procedure division. accept cmd-line from command-line. if cmd-line not = spaces inspect cmd-line tallying cmd-length for characters before initial space end-if call "main" using main-linkage. exit program.