PACKAGE III: ZCPR3 INTERNALS 9. INSIDE ZCPR3.............................................307 10. INSIDE THE ZCPR3 COMMAND PROCESSOR.......................308 10.1. Operation of the ZCPR3 CP..........................308 10.1.1. Initialize_Environment.....................309 10.1.2. Input (Command_Line).......................317 10.1.3. Parse (Next_Command).......................324 10.1.4. Resolve (Next_Command).....................325 10.2. COM File Processing................................329 10.3. Invoking Any Command...............................332 10.4. Path Analysis......................................333 10.5. Error Handling.....................................334 10.6. ZCPR3 Command Processor - Wrapup...................336 11. INSIDE THE ZCPR3 SYSTEM SEGMENTS.........................337 11.1. Environment Descriptor.............................337 11.2. Flow and Resident Command Packages.................337 11.3. Input/Output Packages..............................338 11.3.1. Redirectable Input/Output..................338 11.3.2. Redirectable I/O System....................340 11.3.3. What the Redirectable I/O System Buys You..341 11.3.4. Loading Redirectable I/O Drivers...........344 11.4. Named Directory Data Files.........................345 11.5. TCAP Data Files....................................345 12. INSIDE THE ZCPR3 MESSAGE BUFFERS.........................346 13. INSIDE ZEX...............................................351 13.1. ZEX Message........................................352 13.2. ZEX Running Flag...................................353 13.3. ZEX Control Messages...............................353 14. INSIDE THE ZCPR3 SHELLS..................................354 14.1. Shell Self-Installation............................354 14.2. Shell Execution....................................355 15. INSIDE THE ZCPR3 ERROR HANDLERS..........................357 15.1. Error Handler Self-Installation....................357 15.2. Error Handler Execution............................358 16. INSIDE THE ZCPR3 TOOLS...................................359 CONTENTS