source3/lib/readline.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    Samba readline wrapper implementation
   5    Copyright (C) Simo Sorce 2001
   6    Copyright (C) Andrew Tridgell 2001
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 #ifdef HAVE_LIBREADLINE
  26 #  ifdef HAVE_READLINE_READLINE_H
  27 #    include <readline/readline.h>
  28 #    ifdef HAVE_READLINE_HISTORY_H
  29 #      include <readline/history.h>
  30 #    endif
  31 #  else
  32 #    ifdef HAVE_READLINE_H
  33 #      include <readline.h>
  34 #      ifdef HAVE_HISTORY_H
  35 #        include <history.h>
  36 #      endif
  37 #    else
  38 #      undef HAVE_LIBREADLINE
  39 #    endif
  40 #  endif
  41 #endif
  42
  43 /****************************************************************************
  44 display the prompt and wait for input. Call callback() regularly
  45 ****************************************************************************/
  46 static char *smb_readline_replacement(char *prompt, void (*callback)(void),
  47                                       char **(completion_fn)(char *text,
  48                                                              int start,
  49                                                              int end))
  50 {
  51         fd_set fds;
  52         extern FILE *dbf;
  53         static pstring line;
  54         struct timeval timeout;
  55         int fd = fileno(stdin);
  56         char *ret;
  57
  58         fprintf(dbf, "%s", prompt);
  59         fflush(dbf);
  60
  61         while (1) {
  62                 timeout.tv_sec = 5;
  63                 timeout.tv_usec = 0;
  64
  65                 FD_ZERO(&fds);
  66                 FD_SET(fd,&fds);
  67
  68                 if (sys_select_intr(fd+1,&fds,&timeout) == 1) {
  69                         ret = fgets(line, sizeof(line), stdin);
  70                         return ret;
  71                 }
  72                 if (callback) callback();
  73         }
  74 }
  75
  76 /****************************************************************************
  77 display the prompt and wait for input. Call callback() regularly
  78 ****************************************************************************/
  79 char *smb_readline(char *prompt, void (*callback)(void),
  80                    char **(completion_fn)(char *text, int start, int end))
  81 {
  82 #if HAVE_LIBREADLINE
  83         char *ret;
  84
  85         /* Aargh!  Readline does bizzare things with the terminal width
  86            that mucks up expect(1).  Set CLI_NO_READLINE in the environment
  87            to force readline not to be used. */
  88
  89         if (getenv("CLI_NO_READLINE"))
  90                 return smb_readline_replacement(prompt, callback,
  91                                                 completion_fn);
  92
  93         if (completion_fn) {
  94                 rl_attempted_completion_function = completion_fn;
  95         }
  96
  97         if (callback) rl_event_hook = (Function *)callback;
  98         ret = readline(prompt);
  99         if (ret && *ret) add_history(ret);
 100         return ret;
 101 #else
 102         return smb_readline_replacement(prompt, callback, completion_fn);
 103 #endif
 104 }
 105
 106 /****************************************************************************
 107 history
 108 ****************************************************************************/
 109 void cmd_history(void)
 110 {
 111 #if defined(HAVE_LIBREADLINE)
 112         HIST_ENTRY **hlist;
 113         int i;
 114
 115         hlist = history_list();
 116
 117         for (i = 0; hlist && hlist[i]; i++) {
 118                 DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
 119         }
 120 #else
 121         DEBUG(0,("no history without readline support\n"));
 122 #endif
 123 }