Topic       : Pure C Library Documentation
Author      : John Kormylo
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Subject     : Documentation/Pure C Library
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View Ref-File[ SWM_ENVIRON ]

shel_write( 8, mode, len, buffer, 0L );

  <mode> is the operation mode:
         0 = return value is length of current environment string.
         1 = add, modify, or delete environment variable in <buffer>.
             ("PATH=" will delete variable PATH)
         2 = copy <len> bytes from the environment string into
             <buffer>.  Return value is number of bytes left.
  <len> = max size of buffer (<mode> = 2 only).
  <buffer> is a NULL terminated string (<mode> = 1), or returns the
           environment string (<mode> = 2).


Function modifies or copies the environment string.

Note: Implemented starting with AES Version 4.00

See also shel_envrn().