(coreutils.info.gz) printenv invocation

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 19.3 'printenv': Print all or some environment variables
 ========================================================
 
 'printenv' prints environment variable values.  Synopsis:
 
      printenv [OPTION] [VARIABLE]...
 
    If no VARIABLEs are specified, 'printenv' prints the value of every
 environment variable.  Otherwise, it prints the value of each VARIABLE
 that is set, and nothing for those that are not set.
 
    The program accepts the following option.  Also see  Common
 options.
 
 '-0'
 '--null'
      Output a zero byte (ASCII NUL) at the end of each line, rather than
      a newline.  This option enables other programs to parse the output
      of 'printenv' even when that output would contain data with
      embedded newlines.
 
    Exit status:
 
      0 if all variables specified were found
      1 if at least one specified variable was not found
      2 if a write error occurred
 

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