'exit code', 'exit status' or 'return code', and is described only where special conventions areĪdb ]Īdb is a general purpose debugging program. The former byte is 0 for normal termination, the latter is customarily 0 for successful execution, nonzero to indica~e troubles such as erroneous parameters,īad or inaccessible data, or other inability to cope with the task at hand. The cause for termination, and (in the case of 'normal' termination) one supplied by the program, see wait and exit(2). Upon termination each command returns two bytes of status, one supplied by the system giving Were distinguished by (1M) at the top of the page. N.B.: Commands related to system maintenance used to appear in section 1 manual pages and Certain distinctions ofĬommands for communication with other systems.Ĭommands used primarily for graphics and computer-aided design. This section describes publicly accessible commands in alphabetic order.
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