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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / p_man / cat3c / putenv.z / putenv
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Text File  |  1998-10-20  |  3.1 KB  |  67 lines
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  4. ppppuuuutttteeeennnnvvvv((((3333CCCC))))                                                          ppppuuuutttteeeennnnvvvv((((3333CCCC))))
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  8. NNNNAAAAMMMMEEEE
  9.      _pppp_uuuu_tttt_eeee_nnnn_vvvv - change or add value to environment
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  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_tttt_dddd_llll_iiii_bbbb_...._hhhh_>>>>
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  14.      _iiii_nnnn_tttt _pppp_uuuu_tttt_eeee_nnnn_vvvv _((((_cccc_hhhh_aaaa_rrrr _****_ssss_tttt_rrrr_iiii_nnnn_gggg_))))_;;;;
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  16. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  17.      _s_t_r_i_n_g points to a string of the form ``_n_a_m_e_====_v_a_l_u_e.''  _pppp_uuuu_tttt_eeee_nnnn_vvvv makes the
  18.      value of the environment variable _n_a_m_e equal to _v_a_l_u_e by altering an
  19.      existing variable or creating a new one.  In either case, the string
  20.      pointed to by _s_t_r_i_n_g becomes part of the environment, so altering the
  21.      string will change the environment.  The space used by _s_t_r_i_n_g is no
  22.      longer used once a new string-defining _n_a_m_e is passed to _pppp_uuuu_tttt_eeee_nnnn_vvvv.  Because
  23.      of this limitation, _s_t_r_i_n_g should be declared static if it is declared
  24.      within a function.
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  26. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  27.      _eeee_xxxx_eeee_cccc(2), _gggg_eeee_tttt_eeee_nnnn_vvvv(3C), _mmmm_aaaa_llll_llll_oooo_cccc(3C), _eeee_nnnn_vvvv_iiii_rrrr_oooo_nnnn(5).
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  29. DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
  30.      _pppp_uuuu_tttt_eeee_nnnn_vvvv returns non-zero if it was unable to obtain enough space via
  31.      _mmmm_aaaa_llll_llll_oooo_cccc for an expanded environment, otherwise zero.
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  33. WWWWAAAARRRRNNNNIIIINNNNGGGGSSSS
  34.      _pppp_uuuu_tttt_eeee_nnnn_vvvv manipulates the environment pointed to by _e_n_v_i_r_o_n_,,,, and can be used
  35.      in conjunction with _gggg_eeee_tttt_eeee_nnnn_vvvv.  However, _e_n_v_p (the third argument to _m_a_i_n)
  36.      is not changed.
  37.      This routine uses _mmmm_aaaa_llll_llll_oooo_cccc(3C) to enlarge the environment.
  38.      After _pppp_uuuu_tttt_eeee_nnnn_vvvv is called, environmental variables are not in alphabetical
  39.      order.  A potential error is to call the function _pppp_uuuu_tttt_eeee_nnnn_vvvv with a pointer
  40.      to an automatic variable as the argument and to then exit the calling
  41.      function while _s_t_r_i_n_g is still part of the environment.
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  63.                                                                         PPPPaaaaggggeeee 1111
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