AIX Version 7.1 General programming concepts IBM Note Before using this information and the product it supports, read the information in “Notices” on page 755 . This edition applies to AIX Version 7.1 and to all subsequent releases and modifications until otherwise indicated in new editions. © Copyright International Business Machines Corporation 2010, 2018. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents About this document.............................................................................................ix Highlighting..................................................................................................................................................ix Case-sensitivity in AIX................................................................................................................................ ix ISO 9000......................................................................................................................................................ix General programming concepts..............................................................................1 What’s new in General programming concepts.......................................................................................... 1 Tools and utilities......................................................................................................................................... 2 Curses library............................................................................................................................................... 4 Initializing curses....................................................................................................................................5 Windows in the curses environment......................................................................................................6 Manipulating window data with curses................................................................................................. 7 Controlling the cursor with curses.......................................................................................................10 Manipulating characters with curses...................................................................................................10 Understanding terminals with curses .................................................................................................18 Working with color................................................................................................................................23 Manipulating video attributes.............................................................................................................. 24 Manipulating soft labels....................................................................................................................... 26 Curses compatibility.............................................................................................................................27 List of additional curses subroutines...................................................................................................27 Debugging programs..................................................................................................................................29 adb debug program overview.............................................................................................................. 29 Getting started with the adb debug program...................................................................................... 29 Controlling program execution............................................................................................................ 31 Using adb expressions......................................................................................................................... 34 Customizing the adb debug program...................................................................................................36 Computing numbers and displaying text.............................................................................................39 Displaying and manipulating the source file with the adb program................................................... 40 adb debug program reference information......................................................................................... 47 Example adb program: adbsamp.........................................................................................................53 Example adb program: adbsamp2.......................................................................................................53 Example adb program: adbsamp3.......................................................................................................54 Example of directory and i-node dumps in adb debugging................................................................ 55 Example of data formatting in adb debugging.....................................................................................56 Example of tracing multiple functions in adb debugging....................................................................59 dbx symbolic debug program overview............................................................................................... 61 Using the dbx debug program..............................................................................................................61 Displaying and manipulating the source file with the dbx debug program........................................ 64 Examining program data...................................................................................................................... 66 Debugging at the machine level with dbx............................................................................................72 Customizing the dbx debugging environment..................................................................................... 76 Developing for the dbx plug-in framework.......................................................................................... 78 List of dbx subcommands.................................................................................................................... 94 Error-logging overview...............................................................................................................................97 Error-logging facility.............................................................................................................................98 Managing error logging.........................................................................................................................98 Error notification................................................................................................................................ 101 Error logging tasks..............................................................................................................................105 Error logging and alerts......................................................................................................................112 Error logging controls ........................................................................................................................112 iii File systems and logical volumes............................................................................................................114 File types............................................................................................................................................ 114 Working with JFS directories............................................................................................................. 117 Working with JFS2 directories...........................................................................................................119 Working with JFS i-nodes.................................................................................................................. 120 Working with JFS2 i-nodes ............................................................................................................... 122 Allocating JFS file space.................................................................................................................... 123 Allocating JFS2 file space..................................................................................................................126 JFS file system layout........................................................................................................................ 128 JFS2 file system layout...................................................................................................................... 129 Writing programs that access large files........................................................................................... 130 Linking for programmers....................................................................................................................134 Using file descriptors......................................................................................................................... 136 Creating and removing files............................................................................................................... 139 Working with file I/O.......................................................................................................................... 140 File status..........................................................................................................................................