Вызов команды MAN printenv

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PRINTENV(1)		FreeBSD General Commands Manual 	   PRINTENV(1)

NAME
     printenv, env -- print out the environment, set and print environment

SYNOPSIS
     printenv [name]
     env [-] [-i] [name=value ...] [utility [argument ...]]

DESCRIPTION
     The printenv utility prints out the names and values of the variables in
     the environment, with one name/value pair per line.  If name is speci-
     fied, only its value is printed.

     Some shells may provide a builtin printenv command which is similar or
     identical to this utility.  Consult the builtin(1) manual page.

     The env utility executes utility after modifying the environment as spec-
     ified on the command line.  The option name=value specifies an environ-
     ment variable, name, with a value of value.

     The options are as follows:

     -i      Execute the utility with only those environment values specified.
	     The environment inherited by env is ignored completely.

     -	     Identical to the -i option, available for backward compatibility.

     If no utility is specified, env prints out the names and values of the
     variables in the environment, with one name/value pair per line.

     The env utility is sometimes useful with the ``#!'' construct (see
     execve(2)).  The only difference between ``#!/usr/local/bin/foo'' and
     ``#!/usr/bin/env /usr/local/bin/foo'' is that the latter works even if
     /usr/local/bin/foo is itself interpreted.	Using env this way also allows
     one to reference foo without the path, as well as set up the environment
     as desired.

DIAGNOSTICS
     The printenv utility exits 0 on success, and >0 if an error occurs.

     The env utility exits 0 on success, and >0 if an error occurs.  An exit
     status of 126 indicates utility was found, but could not be executed.  An
     exit status of 127 indicates utility could not be found.

SEE ALSO
     csh(1), sh(1), execvp(3), environ(7)

STANDARDS
     The env utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY
     The printenv command appeared in 3.0BSD.

BUGS
     The env utility doesn't handle utility arguments with equal (``='') signs
     in their names, for obvious reasons.

FreeBSD 4.9			 June 6, 1993			   FreeBSD 4.9