Case sensitivity under TSO
When executing under TSO with the IBM-supplied default setting of PLIST(HOST), Language Environment dynamically determines whether a command processor parameter list (CPPL) has been passed. If so, an application with a C or C++ main routine receives the TSO parameter list in an argc, argv format.
If PLIST(TSO) is in effect, the inbound parameter list is a CPPL pointed to by R1. C treats PLIST(TSO) as PLIST(HOST). A user can access the CPPL using the __osplist macro if the user specifies PLIST(OS).
Arguments passed in TSO might be case-sensitive, depending on how your C or C++ program is invoked. Table 1 shows when the arguments are case-sensitive, based on how the C or C++ program is invoked.
| How C or C++ program is invoked | Example | Case of argument |
|---|---|---|
| As TSO command | cprogram args | Mixed case (however, if you pass the arguments entirely in uppercase, the argument is lowercase) |
| By CALL command | CALL cprogram args | Lowercase |
| By CALL command with control asis | CALL cprogram args | Mixed case (however, if you pass the arguments entirely in uppercase, the argument is lowercase) |
| In a CLIST with control asis As a literal passed to CLIST as a parameter |
cprogram args cprogram &arg |
Mixed case Uppercase |