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![Werner Koch](/assets/img/avatar_default.png)
* common/gpgrlhelp.c (read_write_history): New. (gnupg_rl_initialize): Register new function. * common/ttyio.c (my_rl_rw_history): New var. (tty_private_set_rl_hooks): Add arg read_write_history. (tty_read_history): New. (tty_write_history): New. * tools/gpg-card.c (HISTORYNAME): New. (oNoHistory): New enum value. (opts): New option --no-history. (cmd_history): New. (cmds): New command "history". (interactive_loop): Read and save the history. * tools/gpg-connect-agent.c (HISTORYNAME): New. (opts): New option --no-history. (main): Read and save the history. New command /history. -- Yeah, finally we have stored history; I should have added this much earlier. Signed-off-by: Werner Koch <wk@gnupg.org>
165 lines
4.4 KiB
C
165 lines
4.4 KiB
C
/* gpgrlhelp.c - A readline wrapper.
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* Copyright (C) 2006 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either
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*
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* - the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* or
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*
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* - the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* or both in parallel, as here.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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/* This module may by used by applications to initializes readline
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support. It is required so that we can have hooks in other parts
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of libcommon without actually requiring to link against
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libreadline. It works along with ttyio.c which is a proper part of
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libcommon. */
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#include <config.h>
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#include <stdlib.h>
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#include <stddef.h>
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#ifdef HAVE_LIBREADLINE
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#define GNUPG_LIBREADLINE_H_INCLUDED
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#include <stdio.h>
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#include <readline/readline.h>
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#include <readline/history.h>
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#endif
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#include "util.h"
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#include "common-defs.h"
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#ifdef HAVE_LIBREADLINE
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static void
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set_completer (rl_completion_func_t *completer)
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{
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rl_attempted_completion_function = completer;
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rl_inhibit_completion = 0;
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}
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static void
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inhibit_completion (int value)
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{
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rl_inhibit_completion = value;
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}
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static void
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cleanup_after_signal (void)
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{
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rl_free_line_state ();
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rl_cleanup_after_signal ();
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}
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static void
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init_stream (FILE *fp)
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{
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rl_catch_signals = 0;
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rl_instream = rl_outstream = fp;
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rl_inhibit_completion = 1;
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}
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/* Read or write the history to or from the file FILENAME. The
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* behaviour depends on the flag WRITE_MODE:
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*
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* In read mode (WRITE_MODE is false) these semantics are used:
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*
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* If NLINES is positive only this number of lines are read from the
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* history and the history is always limited to that number of
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* lines. A negative value for NLINES is undefined.
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*
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* If FILENAME is NULL the current history is cleared. If NLINES is
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* positive the number of lines stored in the history is limited to
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* that number. A negative value for NLINES is undefined.
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*
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* If WRITE_MODE is true these semantics are used:
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*
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* If NLINES is negative the history and the history file are
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* cleared; if it is zero the entire history is written to the file;
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* if it is positive the history is written to the file and the file
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* is truncated to this number of lines.
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*
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* If FILENAME is NULL no file operations are done but if NLINES is
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* negative the entire history is cleared.
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*
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* On success 0 is returned; on error -1 is returned and ERRNO is set.
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*/
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static int
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read_write_history (const char *filename, int write_mode, int nlines)
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{
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int rc;
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if (write_mode)
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{
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if (nlines < 0)
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clear_history ();
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rc = filename? write_history (filename) : 0;
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if (!rc && filename && nlines > 0)
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rc = history_truncate_file (filename, nlines);
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if (rc)
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{
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gpg_err_set_errno (rc);
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return -1;
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}
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}
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else
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{
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clear_history ();
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if (filename)
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{
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if (nlines)
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rc = read_history_range (filename, 0, nlines);
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else
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rc = read_history (filename);
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if (rc)
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{
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gpg_err_set_errno (rc);
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return -1;
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}
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}
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if (nlines > 0)
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stifle_history (nlines);
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}
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return 0;
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}
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#endif /*HAVE_LIBREADLINE*/
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/* Initialize our readline code. This should be called as early as
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* possible as it is actually a constructor. */
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void
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gnupg_rl_initialize (void)
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{
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#ifdef HAVE_LIBREADLINE
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tty_private_set_rl_hooks (init_stream,
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set_completer,
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inhibit_completion,
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cleanup_after_signal,
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readline,
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add_history,
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read_write_history);
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rl_readline_name = GNUPG_NAME;
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#endif
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}
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