


      IIIINNNNTTTTRRRROOOO((((1111))))                                                 IIIINNNNTTTTRRRROOOO((((1111))))



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           intro - introduction to commands and application programs

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           Section One describes, in alphabetical order, publicly-
           accessible commands.

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           Upon termination, each command returns two bytes of status,
           one supplied by the system and giving the cause for
           termination, and (in the case of ``normal'' termination) one
           supplied by the program (see _w_a_i_t(2) and _e_x_i_t(2)).  The
           former byte is 0 for normal termination; the latter is
           customarily 0 for successful execution and non-zero to
           indicate troubles such as erroneous parameters, bad or
           inaccessible data, or other inability to cope with the task
           at hand.  It is called variously ``exit code'', ``exit
           status'', or ``return code'', and is described only where
           special conventions are involved.




































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