source/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 /****************************************************************************
  26  Display the prompt and wait for input. Call callback() regularly
  27 ****************************************************************************/
  28
  29 char *smb_readline(char *prompt, void (*callback)(void),
  30                    char **(completion_fn)(const char *text, int start, int end))
  31 {
  32         char *ret;
  33         int fd = fileno(stdin);
  34
  35 #if HAVE_LIBREADLINE
  36
  37         /*
  38          * Current versions of readline on Linux seem to have
  39          * problems with EOF on a pipe.
  40          */
  41
  42         if (isatty(fd)) {
  43                 if (completion_fn)
  44                         rl_attempted_completion_function = completion_fn;
  45
  46                 if (callback)
  47                         rl_event_hook = (Function *)callback;
  48                 ret = readline(prompt);
  49                 if (ret && *ret)
  50                         add_history(ret);
  51                 return ret;
  52         } else
  53 #endif
  54         {
  55                 fd_set fds;
  56                 extern FILE *dbf;
  57                 static pstring line;
  58                 struct timeval timeout;
  59
  60                 fprintf(dbf, "%s", prompt);
  61                 fflush(dbf);
  62
  63                 while (1) {
  64                         timeout.tv_sec = 5;
  65                         timeout.tv_usec = 0;
  66
  67                         FD_ZERO(&fds);
  68                         FD_SET(fd,&fds);
  69
  70                         if (sys_select_intr(fd+1,&fds,NULL,NULL,&timeout) == 1) {
  71                                 ret = fgets(line, sizeof(line), stdin);
  72                                 return ret;
  73                         }
  74                         if (callback)
  75                                 callback();
  76                 }
  77         }
  78 }
  79
  80 /****************************************************************************
  81 history
  82 ****************************************************************************/
  83 void cmd_history(void)
  84 {
  85 #if defined(HAVE_LIBREADLINE)
  86         HIST_ENTRY **hlist;
  87         int i;
  88
  89         hlist = history_list();
  90
  91         for (i = 0; hlist && hlist[i]; i++) {
  92                 DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
  93         }
  94 #else
  95         DEBUG(0,("no history without readline support\n"));
  96 #endif
  97 }