[unix-history] / usr / man / cat7 / environ.0



ENVIRON(7)	    UNIX Programmer's Manual	       ENVIRON(7)


N\bNA\bAM\bME\bE
     environ - user environment

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
     e\bex\bxt\bte\ber\brn\bn c\bch\bha\bar\br *\b**\b*e\ben\bnv\bvi\bir\bro\bon\bn;\b;

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     An array of strings called the _\be_\bn_\bv_\bi_\br_\bo_\bn_\bm_\be_\bn_\bt is made available
     by _\be_\bx_\be_\bc_\bv_\be(2) when a process begins.  By convention these
     strings have the form ``_\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be''.  The following names
     are used by various commands:

     EXINIT   A startup list of commands read by _\be_\bx(1), _\be_\bd_\bi_\bt(1),
	      and _\bv_\bi(1).

     HOME     A user's login directory, set by _\bl_\bo_\bg_\bi_\bn(1) from the
	      password file _\bp_\ba_\bs_\bs_\bw_\bd(5).

     PATH     The sequence of directories, separated by colons,
	      searched by _\bc_\bs_\bh(1), _\bs_\bh(1), _\bs_\by_\bs_\bt_\be_\bm(3), _\be_\bx_\be_\bc_\bv_\bp(3),
	      etc, when looking for an executable file.  PATH is
	      set to ``:/usr/ucb:/bin:/usr/bin'' initially by
	      _\bl_\bo_\bg_\bi_\bn(1).

     PRINTER  The name of the default printer to be used by
	      _\bl_\bp_\br(1), _\bl_\bp_\bq(1), and _\bl_\bp_\br_\bm(1).

     SHELL    The full pathname of the user's login shell.

     TERM     The kind of terminal for which output is to be
	      prepared.  This information is used by commands,
	      such as _\bn_\br_\bo_\bf_\bf(1) or _\bp_\bl_\bo_\bt(1G), which may exploit
	      special terminal capabilities.  See /_\be_\bt_\bc/_\bt_\be_\br_\bm_\bc_\ba_\bp
	      (_\bt_\be_\br_\bm_\bc_\ba_\bp(5)) for a list of terminal types.

     TERMCAP  The string describing the terminal in TERM, or, if
	      it begins with a '/', the name of the termcap file.
	      See TERMPATH below, _\bt_\be_\br_\bm_\bc_\ba_\bp(5), and _\bt_\be_\br_\bm_\bc_\ba_\bp(3X).

     TERMPATH A sequence of pathnames of termcap files, separated
	      by colons or spaces, which are searched for termi-
	      nal descriptions in the order listed.  Having no
	      TERMPATH is equivalent to a TERMPATH of
	      ``$HOME/.termcap:/etc/termcap''.	TERMPATH is
	      ignored if TERMCAP contains a full pathname.

     USER     The login name of the user.

     Further names may be placed in the environment by the _\be_\bx_\bp_\bo_\br_\bt
     command and _\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be arguments in _\bs_\bh(1), or by the _\bs_\be_\bt_\be_\bn_\bv
     command if you use _\bc_\bs_\bh(1).  It is unwise to change certain
     _\bs_\bh(1) variables that are frequently exported by ._\bp_\br_\bo_\bf_\bi_\bl_\be


Printed 7/9/88		October 14, 1987			1


ENVIRON(7)	    UNIX Programmer's Manual	       ENVIRON(7)


     files, such as MAIL, PS1, PS2, and IFS, unless you know what
     you are doing.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     csh(1), ex(1), login(1), sh(1), execve(2), execle(3), sys-
     tem(3), termcap(3), termcap(5)


Printed 7/9/88		October 14, 1987			2
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	4	ENVIRON(7) UNIX Programmer's Manual ENVIRON(7)
	5
	6
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	8	N\bNA\bAM\bME\bE
	9	environ - user environment
	10
	11	S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
	12	e\bex\bxt\bte\ber\brn\bn c\bch\bha\bar\br \b\be\ben\bnv\bvi\bir\bro\bon\bn;\b;
	13
	14	D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
	15	An array of strings called the _\be_\bn_\bv_\bi_\br_\bo_\bn_\bm_\be_\bn_\bt is made available
	16	by _\be_\bx_\be_\bc_\bv_\be(2) when a process begins. By convention these
	17	strings have the form ``_\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be''. The following names
	18	are used by various commands:
	19
	20	EXINIT A startup list of commands read by _\be_\bx(1), _\be_\bd_\bi_\bt(1),
	21	and _\bv_\bi(1).
	22
	23	HOME A user's login directory, set by _\bl_\bo_\bg_\bi_\bn(1) from the
	24	password file _\bp_\ba_\bs_\bs_\bw_\bd(5).
	25
	26	PATH The sequence of directories, separated by colons,
	27	searched by _\bc_\bs_\bh(1), _\bs_\bh(1), _\bs_\by_\bs_\bt_\be_\bm(3), _\be_\bx_\be_\bc_\bv_\bp(3),
	28	etc, when looking for an executable file. PATH is
	29	set to ``:/usr/ucb:/bin:/usr/bin'' initially by
	30	_\bl_\bo_\bg_\bi_\bn(1).
	31
	32	PRINTER The name of the default printer to be used by
	33	_\bl_\bp_\br(1), _\bl_\bp_\bq(1), and _\bl_\bp_\br_\bm(1).
	34
	35	SHELL The full pathname of the user's login shell.
	36
	37	TERM The kind of terminal for which output is to be
	38	prepared. This information is used by commands,
	39	such as _\bn_\br_\bo_\bf_\bf(1) or _\bp_\bl_\bo_\bt(1G), which may exploit
	40	special terminal capabilities. See /_\be_\bt_\bc/_\bt_\be_\br_\bm_\bc_\ba_\bp
	41	(_\bt_\be_\br_\bm_\bc_\ba_\bp(5)) for a list of terminal types.
	42
	43	TERMCAP The string describing the terminal in TERM, or, if
	44	it begins with a '/', the name of the termcap file.
	45	See TERMPATH below, _\bt_\be_\br_\bm_\bc_\ba_\bp(5), and _\bt_\be_\br_\bm_\bc_\ba_\bp(3X).
	46
	47	TERMPATH A sequence of pathnames of termcap files, separated
	48	by colons or spaces, which are searched for termi-
	49	nal descriptions in the order listed. Having no
	50	TERMPATH is equivalent to a TERMPATH of
	51	``$HOME/.termcap:/etc/termcap''. TERMPATH is
	52	ignored if TERMCAP contains a full pathname.
	53
	54	USER The login name of the user.
	55
	56	Further names may be placed in the environment by the _\be_\bx_\bp_\bo_\br_\bt
	57	command and _\bn_\ba_\bm_\be=_\bv_\ba_\bl_\bu_\be arguments in _\bs_\bh(1), or by the _\bs_\be_\bt_\be_\bn_\bv
	58	command if you use _\bc_\bs_\bh(1). It is unwise to change certain
	59	_\bs_\bh(1) variables that are frequently exported by ._\bp_\br_\bo_\bf_\bi_\bl_\be
	60
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70	ENVIRON(7) UNIX Programmer's Manual ENVIRON(7)
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74	files, such as MAIL, PS1, PS2, and IFS, unless you know what
75	you are doing.
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77	S\bSE\bEE\bE A\bAL\bLS\bSO\bO
78	csh(1), ex(1), login(1), sh(1), execve(2), execle(3), sys-
79	tem(3), termcap(3), termcap(5)
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