/samba-3.5.6/source3/lib/readline.c
C | 201 lines | 124 code | 30 blank | 47 comment | 18 complexity | 72ba448a072a313e165ce084272823ca MD5 | raw file
- /*
- Unix SMB/CIFS implementation.
- Samba readline wrapper implementation
- Copyright (C) Simo Sorce 2001
- Copyright (C) Andrew Tridgell 2001
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "includes.h"
- #ifdef HAVE_LIBREADLINE
- # ifdef HAVE_READLINE_READLINE_H
- # include <readline/readline.h>
- # ifdef HAVE_READLINE_HISTORY_H
- # include <readline/history.h>
- # endif
- # else
- # ifdef HAVE_READLINE_H
- # include <readline.h>
- # ifdef HAVE_HISTORY_H
- # include <history.h>
- # endif
- # else
- # undef HAVE_LIBREADLINE
- # endif
- # endif
- #endif
- #ifdef HAVE_NEW_LIBREADLINE
- # define RL_COMPLETION_CAST (rl_completion_func_t *)
- #else
- /* This type is missing from libreadline<4.0 (approximately) */
- # define RL_COMPLETION_CAST
- #endif /* HAVE_NEW_LIBREADLINE */
- static bool smb_rl_done;
- #if HAVE_LIBREADLINE
- /*
- * MacOS/X does not have rl_done in readline.h, but
- * readline.so has it
- */
- extern int rl_done;
- #endif
- void smb_readline_done(void)
- {
- smb_rl_done = true;
- #if HAVE_LIBREADLINE
- rl_done = 1;
- #endif
- }
- /****************************************************************************
- Display the prompt and wait for input. Call callback() regularly
- ****************************************************************************/
- static char *smb_readline_replacement(const char *prompt, void (*callback)(void),
- char **(completion_fn)(const char *text, int start, int end))
- {
- fd_set fds;
- char *line = NULL;
- struct timeval timeout;
- int fd = x_fileno(x_stdin);
- char *ret;
- /* Prompt might be NULL in non-interactive mode. */
- if (prompt) {
- x_fprintf(x_stdout, "%s", prompt);
- x_fflush(x_stdout);
- }
- line = (char *)SMB_MALLOC(BUFSIZ);
- if (!line) {
- return NULL;
- }
- while (!smb_rl_done) {
- timeout.tv_sec = 5;
- timeout.tv_usec = 0;
- FD_ZERO(&fds);
- FD_SET(fd,&fds);
- if (sys_select_intr(fd+1,&fds,NULL,NULL,&timeout) == 1) {
- ret = x_fgets(line, BUFSIZ, x_stdin);
- if (ret == 0) {
- SAFE_FREE(line);
- }
- return ret;
- }
- if (callback) {
- callback();
- }
- }
- SAFE_FREE(line);
- return NULL;
- }
- /****************************************************************************
- Display the prompt and wait for input. Call callback() regularly.
- ****************************************************************************/
- char *smb_readline(const char *prompt, void (*callback)(void),
- char **(completion_fn)(const char *text, int start, int end))
- {
- char *ret;
- bool interactive;
- interactive = isatty(x_fileno(x_stdin)) || getenv("CLI_FORCE_INTERACTIVE");
- if (!interactive) {
- return smb_readline_replacement(NULL, callback, completion_fn);
- }
- #if HAVE_LIBREADLINE
- /* Aargh! Readline does bizzare things with the terminal width
- that mucks up expect(1). Set CLI_NO_READLINE in the environment
- to force readline not to be used. */
- if (getenv("CLI_NO_READLINE"))
- return smb_readline_replacement(prompt, callback, completion_fn);
- if (completion_fn) {
- /* The callback prototype has changed slightly between
- different versions of Readline, so the same function
- works in all of them to date, but we get compiler
- warnings in some. */
- rl_attempted_completion_function = RL_COMPLETION_CAST completion_fn;
- }
- #if HAVE_DECL_RL_EVENT_HOOK
- if (callback)
- rl_event_hook = (Function *)callback;
- #endif
- ret = readline(prompt);
- if (ret && *ret)
- add_history(ret);
- #else
- ret = smb_readline_replacement(prompt, callback, completion_fn);
- #endif
- return ret;
- }
- /****************************************************************************
- * return line buffer text
- ****************************************************************************/
- const char *smb_readline_get_line_buffer(void)
- {
- #if defined(HAVE_LIBREADLINE)
- return rl_line_buffer;
- #else
- return NULL;
- #endif
- }
- /****************************************************************************
- * set completion append character
- ***************************************************************************/
- void smb_readline_ca_char(char c)
- {
- #if defined(HAVE_LIBREADLINE)
- rl_completion_append_character = c;
- #endif
- }
- /****************************************************************************
- history
- ****************************************************************************/
- int cmd_history(void)
- {
- #if defined(HAVE_LIBREADLINE) && defined(HAVE_HISTORY_LIST)
- HIST_ENTRY **hlist;
- int i;
- hlist = history_list();
- for (i = 0; hlist && hlist[i]; i++) {
- DEBUG(0, ("%d: %s\n", i, hlist[i]->line));
- }
- #else
- DEBUG(0,("no history without readline support\n"));
- #endif
- return 0;
- }