history.0

基于的linux的oracle sqlplus替代工具

HISTORY(3)                                             HISTORY(3)


       Return the history  entry  at  the  current  position,  as
       determined  by  wwhheerree__hhiissttoorryy(()).   If  there  is  no entry
       there, return a NNUULLLL pointer.

       _H_I_S_T___E_N_T_R_Y _* hhiissttoorryy__ggeett (_i_n_t _o_f_f_s_e_t)
       Return the history entry at position _o_f_f_s_e_t, starting from
       hhiissttoorryy__bbaassee.  If there is no entry there, or if _o_f_f_s_e_t is
       greater than the history length, return a NNUULLLL pointer.

       _i_n_t hhiissttoorryy__ttoottaall__bbyytteess (_v_o_i_d)
       Return the  number  of  bytes  that  the  primary  history
       entries  are  using.  This function returns the sum of the
       lengths of all the lines in the history.


   MMoovviinngg AArroouunndd tthhee HHiissttoorryy LLiisstt
       These functions allow the current index into  the  history
       list to be set or changed.

       _i_n_t hhiissttoorryy__sseett__ppooss (_i_n_t _p_o_s)
       Set  the  current history offset to _p_o_s, an absolute index
       into the list.  Returns 1 on success, 0  if  _p_o_s  is  less
       than zero or greater than the number of history entries.

       _H_I_S_T___E_N_T_R_Y _* pprreevviioouuss__hhiissttoorryy (_v_o_i_d)
       Back up the current history offset to the previous history
       entry, and return a pointer to that entry.  If there is no
       previous entry, return a NNUULLLL pointer.

       _H_I_S_T___E_N_T_R_Y _* nneexxtt__hhiissttoorryy (_v_o_i_d)
       Move  the  current history offset forward to the next his-
       tory entry, and return the a pointer to  that  entry.   If
       there is no next entry, return a NNUULLLL pointer.


   SSeeaarrcchhiinngg tthhee HHiissttoorryy LLiisstt
       These  functions  allow  searching of the history list for
       entries containing a specific string.   Searching  may  be
       performed  both forward and backward from the current his-
       tory position.  The search may be _a_n_c_h_o_r_e_d,  meaning  that
       the  string  must  match  at  the beginning of the history
       entry.

       _i_n_t hhiissttoorryy__sseeaarrcchh (_c_o_n_s_t _c_h_a_r _*_s_t_r_i_n_g_, _i_n_t _d_i_r_e_c_t_i_o_n)
       Search the history for _s_t_r_i_n_g,  starting  at  the  current
       history  offset.   If  _d_i_r_e_c_t_i_o_n  is less than 0, then the
       search is through previous entries, otherwise through sub-
       sequent  entries.   If  _s_t_r_i_n_g  is found, then the current
       history index is set to that history entry, and the  value
       returned  is  the  offset  in  the line of the entry where
       _s_t_r_i_n_g was found.  Otherwise, nothing is changed, and a -1
       is returned.

       _i_n_t   hhiissttoorryy__sseeaarrcchh__pprreeffiixx   (_c_o_n_s_t   _c_h_a_r  _*_s_t_r_i_n_g_,  _i_n_t



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HISTORY(3)                                             HISTORY(3)


       _d_i_r_e_c_t_i_o_n)
       Search the history for _s_t_r_i_n_g,  starting  at  the  current
       history  offset.   The  search is anchored: matching lines
       must begin with _s_t_r_i_n_g.  If _d_i_r_e_c_t_i_o_n is less than 0, then
       the  search is through previous entries, otherwise through
       subsequent entries.  If _s_t_r_i_n_g is found, then the  current
       history  index  is set to that entry, and the return value
       is  0.   Otherwise,  nothing  is  changed,  and  a  -1  is
       returned.

       _i_n_t hhiissttoorryy__sseeaarrcchh__ppooss (_c_o_n_s_t _c_h_a_r _*_s_t_r_i_n_g_, _i_n_t _d_i_r_e_c_t_i_o_n_,
       _i_n_t _p_o_s)
       Search for _s_t_r_i_n_g in the history list, starting at _p_o_s, an
       absolute  index  into the list.  If _d_i_r_e_c_t_i_o_n is negative,
       the search proceeds backward from _p_o_s, otherwise  forward.
       Returns  the  absolute  index of the history element where
       _s_t_r_i_n_g was found, or -1 otherwise.


   MMaannaaggiinngg tthhee HHiissttoorryy FFiillee
       The History library can read the history from and write it
       to  a file.  This section documents the functions for man-
       aging a history file.

       _i_n_t rreeaadd__hhiissttoorryy (_c_o_n_s_t _c_h_a_r _*_f_i_l_e_n_a_m_e)
       Add the contents of _f_i_l_e_n_a_m_e to the history list,  a  line
       at  a  time.   If _f_i_l_e_n_a_m_e is NNUULLLL, then read from _~_/_._h_i_s_-
       _t_o_r_y.  Returns 0 if successful, or eerrrrnnoo if not.

       _i_n_t rreeaadd__hhiissttoorryy__rraannggee (_c_o_n_s_t _c_h_a_r  _*_f_i_l_e_n_a_m_e_,  _i_n_t  _f_r_o_m_,
       _i_n_t _t_o)
       Read  a  range  of lines from _f_i_l_e_n_a_m_e, adding them to the
       history list.  Start reading at line _f_r_o_m and end  at  _t_o.
       If  _f_r_o_m  is  zero, start at the beginning.  If _t_o is less
       than _f_r_o_m, then read until the end of the file.  If  _f_i_l_e_-
       _n_a_m_e  is  NNUULLLL,  then  read from _~_/_._h_i_s_t_o_r_y.  Returns 0 if
       successful, or eerrrrnnoo if not.

       _i_n_t wwrriittee__hhiissttoorryy (_c_o_n_s_t _c_h_a_r _*_f_i_l_e_n_a_m_e)
       Write the current history to _f_i_l_e_n_a_m_e,  overwriting  _f_i_l_e_-
       _n_a_m_e  if  necessary.   If _f_i_l_e_n_a_m_e is NNUULLLL, then write the
       history list to _~_/_._h_i_s_t_o_r_y.   Returns  0  on  success,  or
       eerrrrnnoo on a read or write error.


       _i_n_t aappppeenndd__hhiissttoorryy (_i_n_t _n_e_l_e_m_e_n_t_s_, _c_o_n_s_t _c_h_a_r _*_f_i_l_e_n_a_m_e)
       Append the last _n_e_l_e_m_e_n_t_s of the history list to _f_i_l_e_n_a_m_e.
       If _f_i_l_e_n_a_m_e is NNUULLLL, then append to _~_/_._h_i_s_t_o_r_y.  Returns 0
       on success, or eerrrrnnoo on a read or write error.

       _i_n_t   hhiissttoorryy__ttrruunnccaattee__ffiillee  (_c_o_n_s_t  _c_h_a_r  _*_f_i_l_e_n_a_m_e_,  _i_n_t
       _n_l_i_n_e_s)
       Truncate the history file _f_i_l_e_n_a_m_e, leaving only the  last
       _n_l_i_n_e_s  lines.   If  _f_i_l_e_n_a_m_e  is NNUULLLL, then _~_/_._h_i_s_t_o_r_y is



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HISTORY(3)                                             HISTORY(3)


       truncated.  Returns 0 on success, or eerrrrnnoo on failure.


   HHiissttoorryy EExxppaannssiioonn
       These functions implement history expansion.

       _i_n_t hhiissttoorryy__eexxppaanndd (_c_h_a_r _*_s_t_r_i_n_g_, _c_h_a_r _*_*_o_u_t_p_u_t)
       Expand _s_t_r_i_n_g, placing the result into _o_u_t_p_u_t,  a  pointer
       to a string.  Returns:
              0      If no expansions took place (or, if the only
                     change in the text was the removal of escape
                     characters  preceding  the history expansion
                     character);
              1      if expansions did take place;
              -1     if there was an error in expansion;
              2      if the returned line  should  be  displayed,
                     but not executed, as with the ::pp modifier.
       If  an  error ocurred in expansion, then _o_u_t_p_u_t contains a
       descriptive error message.

       _c_h_a_r _* ggeett__hhiissttoorryy__eevveenntt (_c_o_n_s_t _c_h_a_r _*_s_t_r_i_n_g_, _i_n_t _*_c_i_n_d_e_x_,
       _i_n_t _q_c_h_a_r)
       Returns  the text of the history event beginning at _s_t_r_i_n_g
       + _*_c_i_n_d_e_x.  _*_c_i_n_d_e_x is modified  to  point  to  after  the
       event  specifier.  At function entry, _c_i_n_d_e_x points to the
       index into _s_t_r_i_n_g where the  history  event  specification
       begins.   _q_c_h_a_r  is a character that is allowed to end the
       event specification in addition to the  ``normal''  termi-
       nating characters.

       _c_h_a_r _*_* hhiissttoorryy__ttookkeenniizzee (_c_o_n_s_t _c_h_a_r _*_s_t_r_i_n_g)
       Return  an  array  of tokens parsed out of _s_t_r_i_n_g, much as
       the shell might.  The tokens are split on  the  characters
       in the hhiissttoorryy__wwoorrdd__ddeelliimmiitteerrss variable, and shell quoting
       conventions are obeyed.

       _c_h_a_r _* hhiissttoorryy__aarrgg__eexxttrraacctt (_i_n_t  _f_i_r_s_t_,  _i_n_t  _l_a_s_t_,  _c_o_n_s_t
       _c_h_a_r _*_s_t_r_i_n_g)
       Extract  a  string segment consisting of the _f_i_r_s_t through
       _l_a_s_t arguments present in  _s_t_r_i_n_g.   Arguments  are  split
       using hhiissttoorryy__ttookkeenniizzee(()).


   HHiissttoorryy VVaarriiaabblleess
       This  section  describes  the externally-visible variables
       exported by the GNU History Library.

       _i_n_t hhiissttoorryy__bbaassee
       The logical offset of the first entry in the history list.

       _i_n_t hhiissttoorryy__lleennggtthh
       The  number  of  entries  currently  stored in the history
       list.




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HISTORY(3)                                             HISTORY(3)


       _i_n_t hhiissttoorryy__mmaaxx__eennttrriieess
       The maximum number  of  history  entries.   This  must  be
       changed using ssttiiffllee__hhiissttoorryy(()).

       _c_h_a_r hhiissttoorryy__eexxppaannssiioonn__cchhaarr
       The  character  that  introduces  a  history  event.   The
       default is !!.  Setting this to 0 inhibits  history  expan-
       sion.

       _c_h_a_r hhiissttoorryy__ssuubbsstt__cchhaarr
       The  character  that invokes word substitution if found at
       the start of a line.  The default is ^^.

       _c_h_a_r hhiissttoorryy__ccoommmmeenntt__cchhaarr
       During tokenization, if this  character  is  seen  as  the
       first  character  of  a  word,  then it and all subsequent
       characters up to a newline are ignored,  suppressing  his-
       tory  expansion  for  the  remainder of the line.  This is
       disabled by default.

       _c_h_a_r _* hhiissttoorryy__wwoorrdd__ddeelliimmiitteerrss
       The  characters  that  separate  tokens  for  hhiissttoorryy__ttookk--
       eenniizzee(()).  The default value is "" \\tt\\nn(())<<>>;;&&||"".

       _c_h_a_r _* hhiissttoorryy__nnoo__eexxppaanndd__cchhaarrss
       The  list of characters which inhibit history expansion if
       found immediately following  hhiissttoorryy__eexxppaannssiioonn__cchhaarr.   The
       default is space, tab, newline, \\rr, and ==.

       _c_h_a_r _* hhiissttoorryy__sseeaarrcchh__ddeelliimmiitteerr__cchhaarrss
       The list of additional characters which can delimit a his-
       tory search string, in addition to space, tab, _: and _?  in
       the case of a substring search.  The default is empty.

       _i_n_t hhiissttoorryy__qquuootteess__iinnhhiibbiitt__eexxppaannssiioonn
       If  non-zero,  single-quoted words are not scanned for the
       history expansion character.  The default value is 0.

       _r_l___l_i_n_e_b_u_f___f_u_n_c___t _* hhiissttoorryy__iinnhhiibbiitt__eexxppaannssiioonn__ffuunnccttiioonn
       This should be set to the address of a function that takes
       two  arguments:  a  cchhaarr  ** (_s_t_r_i_n_g) and an iinntt index into
       that string (_i).  It should return a non-zero value if the
       history expansion starting at _s_t_r_i_n_g_[_i_] should not be per-
       formed; zero if the  expansion  should  be  done.   It  is
       intended  for  use  by applications like bbaasshh that use the
       history expansion character for additional  purposes.   By
       default, this variable is set to NNUULLLL.

FFIILLEESS
       _~_/_._h_i_s_t_o_r_y
              Default filename for reading and writing saved his-
              tory





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HISTORY(3)                                             HISTORY(3)


SSEEEE AALLSSOO
       _T_h_e _G_n_u _R_e_a_d_l_i_n_e _L_i_b_r_a_r_y, Brian Fox and Chet Ramey
       _T_h_e _G_n_u _H_i_s_t_o_r_y _L_i_b_r_a_r_y, Brian Fox and Chet Ramey
       _b_a_s_h(1)
       _r_e_a_d_l_i_n_e(3)

AAUUTTHHOORRSS
       Brian Fox, Free Software Foundation
       [e-mail]

       Chet Ramey, Case Western Reserve University
       [e-mail]

BBUUGG RREEPPOORRTTSS
       If you find a bug  in  the  hhiissttoorryy  library,  you  should
       report it.  But first, you should make sure that it really
       is a bug, and that it appears in the latest version of the
       hhiissttoorryy library that you have.

       Once  you have determined that a bug actually exists, mail
       a bug report to _b_u_g_-_r_e_a_d_l_i_n_e@_g_n_u_._o_r_g.  If you have a  fix,
       you  are  welcome  to  mail that as well!  Suggestions and
       `philosophical' bug reports may  be  mailed  to  _b_u_g_-_r_e_a_d_-
       _l_i_n_e@_g_n_u_._o_r_g   or   posted   to   the   Usenet   newsgroup
       ggnnuu..bbaasshh..bbuugg.

       Comments and  bug  reports  concerning  this  manual  page
       should be directed to _c_h_e_t_@_i_n_s_._C_W_R_U_._E_d_u.





























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