Elena Zannoni
27 years ago
19 changed files with 11206 additions and 6263 deletions
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From rms@gnu.org Thu Jul 22 20:37:55 1999 |
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Thu, 22 Jul 1999 18:37:46 -0600 (MDT) |
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Date: Thu, 22 Jul 1999 18:37:46 -0600 (MDT) |
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Message-Id: <199907230037.SAA01089@wijiji.santafe.edu> |
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X-Authentication-Warning: wijiji.santafe.edu: rms set sender to rms@gnu.org using -f |
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From: Richard Stallman <rms@gnu.org> |
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To: chet@nike.ins.cwru.edu |
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Subject: Use of Readline |
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Reply-to: rms@gnu.org |
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|
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I think Allbery's suggestion is a good one. So please add this text |
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in a suitable place. Please don't put it in the GPL itself; that |
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should be the same as the GPL everywhere else. Putting it in the |
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README and/or the documentation would be a good idea. |
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|
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|
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====================================================================== |
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Our position on the use of Readline through a shared-library linking |
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mechanism is that there is no legal difference between shared-library |
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linking and static linking--either kind of linking combines various |
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modules into a single larger work. The conditions for using Readline |
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in a larger work are stated in section 3 of the GNU GPL. |
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|
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|
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\input texinfo @c -*-texinfo-*- |
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@comment %**start of header (This is for running Texinfo on a region.) |
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@setfilename rluserman.info |
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@settitle GNU Readline Library |
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@comment %**end of header (This is for running Texinfo on a region.) |
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@setchapternewpage odd |
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|
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@include manvers.texinfo |
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|
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@ifinfo |
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@dircategory Libraries |
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@direntry |
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* Readline: (readline). The GNU readline library API |
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@end direntry |
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|
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This document describes the end user interface of the GNU Readline Library, |
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a utility which aids in the consistency of user interface across discrete |
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programs that need to provide a command line interface. |
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|
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Copyright (C) 1988-1999 Free Software Foundation, Inc. |
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|
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Permission is granted to make and distribute verbatim copies of |
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this manual provided the copyright notice and this permission notice |
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pare preserved on all copies. |
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|
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@ignore |
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Permission is granted to process this file through TeX and print the |
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results, provided the printed document carries copying permission |
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notice identical to this one except for the removal of this paragraph |
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(this paragraph not being relevant to the printed manual). |
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@end ignore |
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|
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Permission is granted to copy and distribute modified versions of this |
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manual under the conditions for verbatim copying, provided that the entire |
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resulting derived work is distributed under the terms of a permission |
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notice identical to this one. |
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|
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Permission is granted to copy and distribute translations of this manual |
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into another language, under the above conditions for modified versions, |
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except that this permission notice may be stated in a translation approved |
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by the Free Software Foundation. |
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@end ifinfo |
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|
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@titlepage |
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@title GNU Readline Library User Interface |
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@subtitle Edition @value{EDITION}, for @code{Readline Library} Version @value{VERSION}. |
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@subtitle @value{UPDATE-MONTH} |
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@author Brian Fox, Free Software Foundation |
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@author Chet Ramey, Case Western Reserve University |
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|
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@page |
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This document describes the end user interface of the GNU Readline Library, |
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a utility which aids in the consistency of user interface across discrete |
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programs that need to provide a command line interface. |
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|
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Published by the Free Software Foundation @* |
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59 Temple Place, Suite 330, @* |
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Boston, MA 02111 USA |
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|
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Permission is granted to make and distribute verbatim copies of |
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this manual provided the copyright notice and this permission notice |
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are preserved on all copies. |
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|
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Permission is granted to copy and distribute modified versions of this |
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manual under the conditions for verbatim copying, provided that the entire |
|||
resulting derived work is distributed under the terms of a permission |
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notice identical to this one. |
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|
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Permission is granted to copy and distribute translations of this manual |
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into another language, under the above conditions for modified versions, |
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except that this permission notice may be stated in a translation approved |
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by the Free Software Foundation. |
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|
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@vskip 0pt plus 1filll |
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Copyright @copyright{} 1988-1999 Free Software Foundation, Inc. |
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@end titlepage |
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|
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@ifinfo |
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@node Top |
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@top GNU Readline Library |
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|
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This document describes the end user interface of the GNU Readline Library, |
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a utility which aids in the consistency of user interface across discrete |
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programs that need to provide a command line interface. |
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|
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@menu |
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* Command Line Editing:: GNU Readline User's Manual. |
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@end menu |
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@end ifinfo |
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|
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@include rluser.texinfo |
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|
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@contents |
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@bye |
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@ -0,0 +1,186 @@ |
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/*
|
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From: Jeff Solomon <jsolomon@stanford.edu> |
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Date: Fri, 9 Apr 1999 10:13:27 -0700 (PDT) |
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To: chet@po.cwru.edu |
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Subject: new readline example |
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Message-ID: <14094.12094.527305.199695@mrclean.Stanford.EDU> |
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|
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Chet, |
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|
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I've been using readline 4.0. Specifically, I've been using the perl |
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version Term::ReadLine::Gnu. It works great. |
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|
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Anyway, I've been playing around the alternate interface and I wanted |
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to contribute a little C program, callback.c, to you that you could |
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use as an example of the alternate interface in the /examples |
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directory of the readline distribution. |
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|
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My example shows how, using the alternate interface, you can |
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interactively change the prompt (which is very nice imo). Also, I |
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point out that you must roll your own terminal setting when using the |
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alternate interface because readline depreps (using your parlance) the |
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terminal while in the user callback. I try to demostrate what I mean |
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with an example. I've included the program below. |
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|
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To compile, I just put the program in the examples directory and made |
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the appropriate changes to the EXECUTABLES and OBJECTS line and added |
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an additional target 'callback'. |
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|
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I compiled on my Sun Solaris2.6 box using Sun's cc. |
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|
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Let me know what you think. |
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|
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Jeff |
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*/ |
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|
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#if defined (HAVE_CONFIG_H) |
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#include <config.h> |
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#endif |
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|
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#include <stdio.h> |
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#include <sys/types.h> |
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|
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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|
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#include <termios.h> /* xxx - should make this more general */ |
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|
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#ifdef READLINE_LIBRARY |
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# include "readline.h" |
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#else |
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# include <readline/readline.h> |
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#endif |
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|
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/* This little examples demonstrates the alternate interface to using readline.
|
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* In the alternate interface, the user maintains control over program flow and |
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* only calls readline when STDIN is readable. Using the alternate interface, |
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* you can do anything else while still using readline (like talking to a |
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* network or another program) without blocking. |
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* |
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* Specifically, this program highlights two importants features of the |
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* alternate interface. The first is the ability to interactively change the |
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* prompt, which can't be done using the regular interface since rl_prompt is |
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* read-only. |
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* |
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* The second feature really highlights a subtle point when using the alternate |
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* interface. That is, readline will not alter the terminal when inside your |
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* callback handler. So let's so, your callback executes a user command that |
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* takes a non-trivial amount of time to complete (seconds). While your |
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* executing the command, the user continues to type keystrokes and expects them |
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* to be re-echoed on the new prompt when it returns. Unfortunately, the default |
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* terminal configuration doesn't do this. After the prompt returns, the user |
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* must hit one additional keystroke and then will see all of his previous |
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* keystrokes. To illustrate this, compile and run this program. Type "sleep" at |
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* the prompt and then type "bar" before the prompt returns (you have 3 |
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* seconds). Notice how "bar" is re-echoed on the prompt after the prompt |
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* returns? This is what you expect to happen. Now comment out the 4 lines below |
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* the line that says COMMENT LINE BELOW. Recompile and rerun the program and do |
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* the same thing. When the prompt returns, you should not see "bar". Now type |
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* "f", see how "barf" magically appears? This behavior is un-expected and not |
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* desired. |
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*/ |
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|
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void process_line(char *line); |
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int change_prompt(void); |
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char *get_prompt(void); |
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|
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int prompt = 1; |
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char prompt_buf[40], line_buf[256]; |
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tcflag_t old_lflag; |
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cc_t old_vtime; |
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struct termios term; |
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|
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int |
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main() |
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{ |
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fd_set fds; |
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|
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/* Adjust the terminal slightly before the handler is installed. Disable
|
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* canonical mode processing and set the input character time flag to be |
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* non-blocking. |
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*/ |
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if( tcgetattr(STDIN_FILENO, &term) < 0 ) { |
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perror("tcgetattr"); |
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exit(1); |
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} |
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old_lflag = term.c_lflag; |
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old_vtime = term.c_cc[VTIME]; |
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term.c_lflag &= ~ICANON; |
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term.c_cc[VTIME] = 1; |
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/* COMMENT LINE BELOW - see above */ |
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if( tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0 ) { |
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perror("tcsetattr"); |
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exit(1); |
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} |
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|
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rl_add_defun("change-prompt", change_prompt, CTRL('t')); |
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rl_callback_handler_install(get_prompt(), process_line); |
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|
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while(1) { |
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FD_ZERO(&fds); |
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FD_SET(fileno(stdin), &fds); |
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|
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if( select(FD_SETSIZE, &fds, NULL, NULL, NULL) < 0) { |
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perror("select"); |
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exit(1); |
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} |
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|
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if( FD_ISSET(fileno(stdin), &fds) ) { |
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rl_callback_read_char(); |
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} |
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} |
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} |
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|
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void |
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process_line(char *line) |
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{ |
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if( line == NULL ) { |
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fprintf(stderr, "\n", line); |
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|
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/* reset the old terminal setting before exiting */ |
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term.c_lflag = old_lflag; |
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term.c_cc[VTIME] = old_vtime; |
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if( tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0 ) { |
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perror("tcsetattr"); |
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exit(1); |
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} |
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exit(0); |
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} |
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|
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if( strcmp(line, "sleep") == 0 ) { |
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sleep(3); |
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} else { |
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fprintf(stderr, "|%s|\n", line); |
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} |
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} |
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|
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int |
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change_prompt(void) |
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{ |
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/* toggle the prompt variable */ |
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prompt = !prompt; |
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|
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/* save away the current contents of the line */ |
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strcpy(line_buf, rl_line_buffer); |
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|
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/* install a new handler which will change the prompt and erase the current line */ |
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rl_callback_handler_install(get_prompt(), process_line); |
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|
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/* insert the old text on the new line */ |
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rl_insert_text(line_buf); |
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|
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/* redraw the current line - this is an undocumented function. It invokes the
|
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* redraw-current-line command. |
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*/ |
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rl_refresh_line(0, 0); |
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} |
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|
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char * |
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get_prompt(void) |
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{ |
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/* The prompts can even be different lengths! */ |
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sprintf(prompt_buf, "%s", |
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prompt ? "Hit ctrl-t to toggle prompt> " : "Pretty cool huh?> "); |
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return prompt_buf; |
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} |
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@ -0,0 +1,685 @@ |
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/* A front-end using readline to "cook" input lines for Kawa.
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* |
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* Copyright (C) 1999 Per Bothner |
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* |
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* This front-end program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as published |
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* by the Free Software Foundation; either version 2, or (at your option) |
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* any later version. |
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* |
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* Some code from Johnson & Troan: "Linux Application Development" |
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* (Addison-Wesley, 1998) was used directly or for inspiration. |
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*/ |
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|
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/* PROBLEMS/TODO:
|
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* |
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* Only tested under Linux; needs to be ported. |
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* |
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* When running mc -c under the Linux console, mc does not recognize |
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* mouse clicks, which mc does when not running under fep. |
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* |
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* Pasting selected text containing tabs is like hitting the tab character, |
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* which invokes readline completion. We don't want this. I don't know |
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* if this is fixable without integrating fep into a terminal emulator. |
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* |
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* Echo suppression is a kludge, but can only be avoided with better kernel |
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* support: We need a tty mode to disable "real" echoing, while still |
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* letting the inferior think its tty driver to doing echoing. |
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* Stevens's book claims SCR$ and BSD4.3+ have TIOCREMOTE. |
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* |
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* The latest readline may have some hooks we can use to avoid having |
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* to back up the prompt. |
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* |
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* Desirable readline feature: When in cooked no-echo mode (e.g. password), |
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* echo characters are they are types with '*', but remove them when done. |
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* |
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* A synchronous output while we're editing an input line should be |
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* inserted in the output view *before* the input line, so that the |
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* lines being edited (with the prompt) float at the end of the input. |
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* |
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* A "page mode" option to emulate more/less behavior: At each page of |
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* output, pause for a user command. This required parsing the output |
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* to keep track of line lengths. It also requires remembering the |
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* output, if we want an option to scroll back, which suggests that |
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* this should be integrated with a terminal emulator like xterm. |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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|
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#include <stdio.h> |
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#include <fcntl.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <signal.h> |
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#include <netdb.h> |
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#include <stdlib.h> |
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#include <errno.h> |
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#include <grp.h> |
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#include <string.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <sys/ioctl.h> |
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#include <termios.h> |
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|
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#ifdef READLINE_LIBRARY |
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# include "readline.h" |
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# include "history.h" |
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#else |
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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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|
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#ifndef COMMAND |
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#define COMMAND "/bin/sh" |
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#endif |
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#ifndef COMMAND_ARGS |
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#define COMMAND_ARGS COMMAND |
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#endif |
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|
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#ifndef HAVE_MEMMOVE |
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# if __GNUC__ > 1 |
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# define memmove(d, s, n) __builtin_memcpy(d, s, n) |
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# else |
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# define memmove(d, s, n) memcpy(d, s, n) |
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# endif |
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#else |
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# define memmove(d, s, n) memcpy(d, s, n) |
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#endif |
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|
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#define APPLICATION_NAME "Fep" |
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|
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static int in_from_inferior_fd; |
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static int out_to_inferior_fd; |
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|
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/* Unfortunately, we cannot safely display echo from the inferior process.
|
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The reason is that the echo bit in the pty is "owned" by the inferior, |
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and if we try to turn it off, we could confuse the inferior. |
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Thus, when echoing, we get echo twice: First readline echoes while |
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we're actually editing. Then we send the line to the inferior, and the |
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terminal driver send back an extra echo. |
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The work-around is to remember the input lines, and when we see that |
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line come back, we supress the output. |
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A better solution (supposedly available on SVR4) would be a smarter |
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terminal driver, with more flags ... */ |
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#define ECHO_SUPPRESS_MAX 1024 |
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char echo_suppress_buffer[ECHO_SUPPRESS_MAX]; |
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int echo_suppress_start = 0; |
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int echo_suppress_limit = 0; |
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|
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#define DEBUG |
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|
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#ifdef DEBUG |
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FILE *logfile = NULL; |
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#define DPRINT0(FMT) (fprintf(logfile, FMT), fflush(logfile)) |
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#define DPRINT1(FMT, V1) (fprintf(logfile, FMT, V1), fflush(logfile)) |
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#define DPRINT2(FMT, V1, V2) (fprintf(logfile, FMT, V1, V2), fflush(logfile)) |
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#else |
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#define DPRINT0(FMT) /* Do nothing */ |
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#define DPRINT1(FMT, V1) /* Do nothing */ |
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#define DPRINT2(FMT, V1, V2) /* Do nothing */ |
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#endif |
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|
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struct termios orig_term; |
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|
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/* Pid of child process. */ |
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static pid_t child = -1; |
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|
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static void |
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sig_child (int signo) |
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{ |
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int status; |
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wait (&status); |
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DPRINT0 ("(Child process died.)\n"); |
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tcsetattr(STDIN_FILENO, TCSANOW, &orig_term); |
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exit (0); |
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} |
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|
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volatile int propagate_sigwinch = 0; |
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|
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/* sigwinch_handler
|
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* propagate window size changes from input file descriptor to |
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* master side of pty. |
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*/ |
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void sigwinch_handler(int signal) { |
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propagate_sigwinch = 1; |
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} |
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|
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/* get_master_pty() takes a double-indirect character pointer in which
|
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* to put a slave name, and returns an integer file descriptor. |
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* If it returns < 0, an error has occurred. |
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* Otherwise, it has returned the master pty file descriptor, and fills |
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* in *name with the name of the corresponding slave pty. |
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* Once the slave pty has been opened, you are responsible to free *name. |
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*/ |
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|
|||
int get_master_pty(char **name) { |
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int i, j; |
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/* default to returning error */ |
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int master = -1; |
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|
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/* create a dummy name to fill in */ |
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*name = strdup("/dev/ptyXX"); |
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|
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/* search for an unused pty */ |
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for (i=0; i<16 && master <= 0; i++) { |
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for (j=0; j<16 && master <= 0; j++) { |
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(*name)[5] = 'p'; |
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(*name)[8] = "pqrstuvwxyzPQRST"[i]; |
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(*name)[9] = "0123456789abcdef"[j]; |
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/* open the master pty */ |
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if ((master = open(*name, O_RDWR)) < 0) { |
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if (errno == ENOENT) { |
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/* we are out of pty devices */ |
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free (*name); |
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return (master); |
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} |
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} |
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else { |
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/* By substituting a letter, we change the master pty
|
|||
* name into the slave pty name. |
|||
*/ |
|||
(*name)[5] = 't'; |
|||
if (access(*name, R_OK|W_OK) != 0) |
|||
{ |
|||
close(master); |
|||
master = -1; |
|||
} |
|||
} |
|||
} |
|||
} |
|||
if ((master < 0) && (i == 16) && (j == 16)) { |
|||
/* must have tried every pty unsuccessfully */ |
|||
free (*name); |
|||
return (master); |
|||
} |
|||
|
|||
(*name)[5] = 't'; |
|||
|
|||
return (master); |
|||
} |
|||
|
|||
/* get_slave_pty() returns an integer file descriptor.
|
|||
* If it returns < 0, an error has occurred. |
|||
* Otherwise, it has returned the slave file descriptor. |
|||
*/ |
|||
|
|||
int get_slave_pty(char *name) { |
|||
struct group *gptr; |
|||
gid_t gid; |
|||
int slave = -1; |
|||
|
|||
/* chown/chmod the corresponding pty, if possible.
|
|||
* This will only work if the process has root permissions. |
|||
* Alternatively, write and exec a small setuid program that |
|||
* does just this. |
|||
*/ |
|||
if ((gptr = getgrnam("tty")) != 0) { |
|||
gid = gptr->gr_gid; |
|||
} else { |
|||
/* if the tty group does not exist, don't change the
|
|||
* group on the slave pty, only the owner |
|||
*/ |
|||
gid = -1; |
|||
} |
|||
|
|||
/* Note that we do not check for errors here. If this is code
|
|||
* where these actions are critical, check for errors! |
|||
*/ |
|||
chown(name, getuid(), gid); |
|||
/* This code only makes the slave read/writeable for the user.
|
|||
* If this is for an interactive shell that will want to |
|||
* receive "write" and "wall" messages, OR S_IWGRP into the |
|||
* second argument below. |
|||
*/ |
|||
chmod(name, S_IRUSR|S_IWUSR); |
|||
|
|||
/* open the corresponding slave pty */ |
|||
slave = open(name, O_RDWR); |
|||
return (slave); |
|||
} |
|||
|
|||
/* Certain special characters, such as ctrl/C, we want to pass directly
|
|||
to the inferior, rather than letting readline handle them. */ |
|||
|
|||
static char special_chars[20]; |
|||
static int special_chars_count; |
|||
|
|||
static void |
|||
add_special_char(int ch) |
|||
{ |
|||
if (ch != 0) |
|||
special_chars[special_chars_count++] = ch; |
|||
} |
|||
|
|||
static int eof_char; |
|||
|
|||
static int |
|||
is_special_char(int ch) |
|||
{ |
|||
int i; |
|||
#if 0 |
|||
if (ch == eof_char && rl_point == rl_end) |
|||
return 1; |
|||
#endif |
|||
for (i = special_chars_count; --i >= 0; ) |
|||
if (special_chars[i] == ch) |
|||
return 1; |
|||
return 0; |
|||
} |
|||
|
|||
static char buf[1024]; |
|||
/* buf[0 .. buf_count-1] is the what has been emitted on the current line.
|
|||
It is used as the readline prompt. */ |
|||
static int buf_count = 0; |
|||
|
|||
int num_keys = 0; |
|||
|
|||
static void |
|||
null_prep_terminal (int meta) |
|||
{ |
|||
} |
|||
|
|||
static void |
|||
null_deprep_terminal () |
|||
{ |
|||
} |
|||
|
|||
char pending_special_char; |
|||
|
|||
static void |
|||
line_handler (char *line) |
|||
{ |
|||
if (line == NULL) |
|||
{ |
|||
char buf[1]; |
|||
DPRINT0("saw eof!\n"); |
|||
buf[0] = '\004'; /* ctrl/d */ |
|||
write (out_to_inferior_fd, buf, 1); |
|||
} |
|||
else |
|||
{ |
|||
static char enter[] = "\r"; |
|||
/* Send line to inferior: */ |
|||
int length = strlen (line); |
|||
if (length > ECHO_SUPPRESS_MAX-2) |
|||
{ |
|||
echo_suppress_start = 0; |
|||
echo_suppress_limit = 0; |
|||
} |
|||
else |
|||
{ |
|||
if (echo_suppress_limit + length > ECHO_SUPPRESS_MAX - 2) |
|||
{ |
|||
if (echo_suppress_limit - echo_suppress_start + length |
|||
<= ECHO_SUPPRESS_MAX - 2) |
|||
{ |
|||
memmove (echo_suppress_buffer, |
|||
echo_suppress_buffer + echo_suppress_start, |
|||
echo_suppress_limit - echo_suppress_start); |
|||
echo_suppress_limit -= echo_suppress_start; |
|||
echo_suppress_start = 0; |
|||
} |
|||
else |
|||
{ |
|||
echo_suppress_limit = 0; |
|||
} |
|||
echo_suppress_start = 0; |
|||
} |
|||
memcpy (echo_suppress_buffer + echo_suppress_limit, |
|||
line, length); |
|||
echo_suppress_limit += length; |
|||
echo_suppress_buffer[echo_suppress_limit++] = '\r'; |
|||
echo_suppress_buffer[echo_suppress_limit++] = '\n'; |
|||
} |
|||
write (out_to_inferior_fd, line, length); |
|||
if (pending_special_char == 0) |
|||
{ |
|||
write (out_to_inferior_fd, enter, sizeof(enter)-1); |
|||
if (*line) |
|||
add_history (line); |
|||
} |
|||
free (line); |
|||
} |
|||
rl_callback_handler_remove (); |
|||
buf_count = 0; |
|||
num_keys = 0; |
|||
if (pending_special_char != 0) |
|||
{ |
|||
write (out_to_inferior_fd, &pending_special_char, 1); |
|||
pending_special_char = 0; |
|||
} |
|||
} |
|||
|
|||
/* Value of rl_getc_function.
|
|||
Use this because readline should read from stdin, not rl_instream, |
|||
points to the pty (so readline has monitor its terminal modes). */ |
|||
|
|||
int |
|||
my_rl_getc (FILE *dummy) |
|||
{ |
|||
int ch = rl_getc (stdin); |
|||
if (is_special_char (ch)) |
|||
{ |
|||
pending_special_char = ch; |
|||
return '\r'; |
|||
} |
|||
return ch; |
|||
} |
|||
|
|||
int |
|||
main(int argc, char** argv) |
|||
{ |
|||
char *path; |
|||
int i; |
|||
int master; |
|||
char *name; |
|||
int in_from_tty_fd; |
|||
struct sigaction act; |
|||
struct winsize ws; |
|||
struct termios t; |
|||
int maxfd; |
|||
fd_set in_set; |
|||
static char empty_string[1] = ""; |
|||
char *prompt = empty_string; |
|||
int ioctl_err = 0; |
|||
|
|||
#ifdef DEBUG |
|||
logfile = fopen("LOG", "w"); |
|||
#endif |
|||
|
|||
rl_readline_name = APPLICATION_NAME; |
|||
|
|||
if ((master = get_master_pty(&name)) < 0) |
|||
{ |
|||
perror("ptypair: could not open master pty"); |
|||
exit(1); |
|||
} |
|||
|
|||
DPRINT1("pty name: '%s'\n", name); |
|||
|
|||
/* set up SIGWINCH handler */ |
|||
act.sa_handler = sigwinch_handler; |
|||
sigemptyset(&(act.sa_mask)); |
|||
act.sa_flags = 0; |
|||
if (sigaction(SIGWINCH, &act, NULL) < 0) |
|||
{ |
|||
perror("ptypair: could not handle SIGWINCH "); |
|||
exit(1); |
|||
} |
|||
|
|||
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0) |
|||
{ |
|||
perror("ptypair: could not get window size"); |
|||
exit(1); |
|||
} |
|||
|
|||
if ((child = fork()) < 0) |
|||
{ |
|||
perror("cannot fork"); |
|||
exit(1); |
|||
} |
|||
|
|||
if (child == 0) |
|||
{ |
|||
int slave; /* file descriptor for slave pty */ |
|||
|
|||
/* We are in the child process */ |
|||
close(master); |
|||
|
|||
#ifdef TIOCSCTTY |
|||
if ((slave = get_slave_pty(name)) < 0) |
|||
{ |
|||
perror("ptypair: could not open slave pty"); |
|||
exit(1); |
|||
} |
|||
free(name); |
|||
#endif |
|||
|
|||
/* We need to make this process a session group leader, because
|
|||
* it is on a new PTY, and things like job control simply will |
|||
* not work correctly unless there is a session group leader |
|||
* and process group leader (which a session group leader |
|||
* automatically is). This also disassociates us from our old |
|||
* controlling tty. |
|||
*/ |
|||
if (setsid() < 0) |
|||
{ |
|||
perror("could not set session leader"); |
|||
} |
|||
|
|||
/* Tie us to our new controlling tty. */ |
|||
#ifdef TIOCSCTTY |
|||
if (ioctl(slave, TIOCSCTTY, NULL)) |
|||
{ |
|||
perror("could not set new controlling tty"); |
|||
} |
|||
#else |
|||
if ((slave = get_slave_pty(name)) < 0) |
|||
{ |
|||
perror("ptypair: could not open slave pty"); |
|||
exit(1); |
|||
} |
|||
free(name); |
|||
#endif |
|||
|
|||
/* make slave pty be standard in, out, and error */ |
|||
dup2(slave, STDIN_FILENO); |
|||
dup2(slave, STDOUT_FILENO); |
|||
dup2(slave, STDERR_FILENO); |
|||
|
|||
/* at this point the slave pty should be standard input */ |
|||
if (slave > 2) |
|||
{ |
|||
close(slave); |
|||
} |
|||
|
|||
/* Try to restore window size; failure isn't critical */ |
|||
if (ioctl(STDOUT_FILENO, TIOCSWINSZ, &ws) < 0) |
|||
{ |
|||
perror("could not restore window size"); |
|||
} |
|||
|
|||
/* now start the shell */ |
|||
{ |
|||
static char* command_args[] = { COMMAND_ARGS, NULL }; |
|||
if (argc <= 1) |
|||
execvp(COMMAND, command_args); |
|||
else |
|||
execvp(argv[1], &argv[1]); |
|||
} |
|||
|
|||
/* should never be reached */ |
|||
exit(1); |
|||
} |
|||
|
|||
/* parent */ |
|||
signal (SIGCHLD, sig_child); |
|||
free(name); |
|||
|
|||
/* Note that we only set termios settings for standard input;
|
|||
* the master side of a pty is NOT a tty. |
|||
*/ |
|||
tcgetattr(STDIN_FILENO, &orig_term); |
|||
|
|||
t = orig_term; |
|||
eof_char = t.c_cc[VEOF]; |
|||
/* add_special_char(t.c_cc[VEOF]);*/ |
|||
add_special_char(t.c_cc[VINTR]); |
|||
add_special_char(t.c_cc[VQUIT]); |
|||
add_special_char(t.c_cc[VSUSP]); |
|||
#if defined (VDISCARD) |
|||
add_special_char(t.c_cc[VDISCARD]); |
|||
#endif |
|||
|
|||
#if 0 |
|||
t.c_lflag |= (ICANON | ISIG | ECHO | ECHOCTL | ECHOE | \ |
|||
ECHOK | ECHOKE | ECHONL | ECHOPRT ); |
|||
#else |
|||
t.c_lflag &= ~(ICANON | ISIG | ECHO | ECHOCTL | ECHOE | \ |
|||
ECHOK | ECHOKE | ECHONL | ECHOPRT ); |
|||
#endif |
|||
t.c_iflag |= IGNBRK; |
|||
t.c_cc[VMIN] = 1; |
|||
t.c_cc[VTIME] = 0; |
|||
tcsetattr(STDIN_FILENO, TCSANOW, &t); |
|||
in_from_inferior_fd = master; |
|||
out_to_inferior_fd = master; |
|||
rl_instream = fdopen (master, "r"); |
|||
rl_getc_function = my_rl_getc; |
|||
|
|||
rl_prep_term_function = null_prep_terminal; |
|||
rl_deprep_term_function = null_deprep_terminal; |
|||
rl_callback_handler_install (prompt, line_handler); |
|||
|
|||
in_from_tty_fd = STDIN_FILENO; |
|||
FD_ZERO (&in_set); |
|||
maxfd = in_from_inferior_fd > in_from_tty_fd ? in_from_inferior_fd |
|||
: in_from_tty_fd; |
|||
for (;;) |
|||
{ |
|||
int num; |
|||
FD_SET (in_from_inferior_fd, &in_set); |
|||
FD_SET (in_from_tty_fd, &in_set); |
|||
|
|||
num = select(maxfd+1, &in_set, NULL, NULL, NULL); |
|||
|
|||
if (propagate_sigwinch) |
|||
{ |
|||
struct winsize ws; |
|||
if (ioctl (STDIN_FILENO, TIOCGWINSZ, &ws) >= 0) |
|||
{ |
|||
ioctl (master, TIOCSWINSZ, &ws); |
|||
} |
|||
propagate_sigwinch = 0; |
|||
continue; |
|||
} |
|||
|
|||
if (num <= 0) |
|||
{ |
|||
perror ("select"); |
|||
exit (-1); |
|||
} |
|||
if (FD_ISSET (in_from_tty_fd, &in_set)) |
|||
{ |
|||
extern int readline_echoing_p; |
|||
struct termios term_master; |
|||
int do_canon = 1; |
|||
int ioctl_ret; |
|||
|
|||
DPRINT1("[tty avail num_keys:%d]\n", num_keys); |
|||
|
|||
/* If we can't get tty modes for the master side of the pty, we
|
|||
can't handle non-canonical-mode programs. Always assume the |
|||
master is in canonical echo mode if we can't tell. */ |
|||
ioctl_ret = tcgetattr(master, &term_master); |
|||
|
|||
if (ioctl_ret >= 0) |
|||
{ |
|||
DPRINT2 ("echo:%d, canon:%d\n", |
|||
(term_master.c_lflag & ECHO) != 0, |
|||
(term_master.c_lflag & ICANON) != 0); |
|||
do_canon = (term_master.c_lflag & ICANON) != 0; |
|||
readline_echoing_p = (term_master.c_lflag & ECHO) != 0; |
|||
} |
|||
else |
|||
{ |
|||
if (ioctl_err == 0) |
|||
DPRINT1("tcgetattr on master fd failed: errno = %d\n", errno); |
|||
ioctl_err = 1; |
|||
} |
|||
|
|||
if (do_canon == 0 && num_keys == 0) |
|||
{ |
|||
char ch[10]; |
|||
int count = read (STDIN_FILENO, ch, sizeof(ch)); |
|||
write (out_to_inferior_fd, ch, count); |
|||
} |
|||
else |
|||
{ |
|||
if (num_keys == 0) |
|||
{ |
|||
int i; |
|||
/* Re-install callback handler for new prompt. */ |
|||
if (prompt != empty_string) |
|||
free (prompt); |
|||
prompt = malloc (buf_count + 1); |
|||
if (prompt == NULL) |
|||
prompt = empty_string; |
|||
else |
|||
{ |
|||
memcpy (prompt, buf, buf_count); |
|||
prompt[buf_count] = '\0'; |
|||
DPRINT1("New prompt '%s'\n", prompt); |
|||
#if 0 /* ifdef HAVE_RL_ALREADY_PROMPTED -- doesn't work */
|
|||
rl_already_prompted = buf_count > 0; |
|||
#else |
|||
if (buf_count > 0) |
|||
write (1, "\r", 1); |
|||
#endif |
|||
} |
|||
rl_callback_handler_install (prompt, line_handler); |
|||
} |
|||
num_keys++; |
|||
rl_callback_read_char (); |
|||
} |
|||
} |
|||
else /* input from inferior. */ |
|||
{ |
|||
int i; |
|||
int count; |
|||
int old_count; |
|||
if (buf_count > (sizeof(buf) >> 2)) |
|||
buf_count = 0; |
|||
count = read (in_from_inferior_fd, buf+buf_count, |
|||
sizeof(buf) - buf_count); |
|||
if (count <= 0) |
|||
{ |
|||
DPRINT0 ("(Connection closed by foreign host.)\n"); |
|||
tcsetattr(STDIN_FILENO, TCSANOW, &orig_term); |
|||
exit (0); |
|||
} |
|||
old_count = buf_count; |
|||
|
|||
/* Look for any pending echo that we need to suppress. */ |
|||
while (echo_suppress_start < echo_suppress_limit |
|||
&& count > 0 |
|||
&& buf[buf_count] == echo_suppress_buffer[echo_suppress_start]) |
|||
{ |
|||
count--; |
|||
buf_count++; |
|||
echo_suppress_start++; |
|||
} |
|||
|
|||
/* Write to the terminal anything that was not suppressed. */ |
|||
if (count > 0) |
|||
write (1, buf + buf_count, count); |
|||
|
|||
/* Finally, look for a prompt candidate.
|
|||
* When we get around to going input (from the keyboard), |
|||
* we will consider the prompt to be anything since the last |
|||
* line terminator. So we need to save that text in the |
|||
* initial part of buf. However, anything before the |
|||
* most recent end-of-line is not interesting. */ |
|||
buf_count += count; |
|||
#if 1 |
|||
for (i = buf_count; --i >= old_count; ) |
|||
#else |
|||
for (i = buf_count - 1; i-- >= buf_count - count; ) |
|||
#endif |
|||
{ |
|||
if (buf[i] == '\n' || buf[i] == '\r') |
|||
{ |
|||
i++; |
|||
memmove (buf, buf+i, buf_count - i); |
|||
buf_count -= i; |
|||
break; |
|||
} |
|||
} |
|||
DPRINT2("-> i: %d, buf_count: %d\n", i, buf_count); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,271 @@ |
|||
/* rlprivate.h -- functions and variables global to the readline library,
|
|||
but not intended for use by applications. */ |
|||
|
|||
/* Copyright (C) 1999 Free Software Foundation, Inc.
|
|||
|
|||
This file is part of the GNU Readline Library, a library for |
|||
reading lines of text with interactive input and history editing. |
|||
|
|||
The GNU Readline Library 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 2, or |
|||
(at your option) any later version. |
|||
|
|||
The GNU Readline Library 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. |
|||
|
|||
The GNU General Public License is often shipped with GNU software, and |
|||
is generally kept in a file called COPYING or LICENSE. If you do not |
|||
have a copy of the license, write to the Free Software Foundation, |
|||
59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
|||
|
|||
#if !defined (_RL_PRIVATE_H_) |
|||
#define _RL_PRIVATE_H_ |
|||
|
|||
#include "rlconf.h" /* for VISIBLE_STATS */ |
|||
#include "rlstdc.h" |
|||
#include "posixjmp.h" /* defines procenv_t */ |
|||
|
|||
/*************************************************************************
|
|||
* * |
|||
* Global functions undocumented in texinfo manual and not in readline.h * |
|||
* * |
|||
*************************************************************************/ |
|||
|
|||
/* terminal.c */ |
|||
extern char *rl_get_termcap __P((char *)); |
|||
|
|||
/*************************************************************************
|
|||
* * |
|||
* Global variables undocumented in texinfo manual and not in readline.h * |
|||
* * |
|||
*************************************************************************/ |
|||
|
|||
/* complete.c */ |
|||
extern int rl_complete_with_tilde_expansion; |
|||
#if defined (VISIBLE_STATS) |
|||
extern int rl_visible_stats; |
|||
#endif /* VISIBLE_STATS */ |
|||
|
|||
/* readline.c */ |
|||
extern int rl_line_buffer_len; |
|||
extern int rl_numeric_arg; |
|||
extern int rl_arg_sign; |
|||
extern int rl_explicit_arg; |
|||
extern int rl_editing_mode; |
|||
extern int rl_visible_prompt_length; |
|||
extern Function *rl_last_func; |
|||
extern int readline_echoing_p; |
|||
extern int rl_key_sequence_length; |
|||
|
|||
/* display.c */ |
|||
extern int rl_display_fixed; |
|||
|
|||
/* parens.c */ |
|||
extern int rl_blink_matching_paren; |
|||
|
|||
/*************************************************************************
|
|||
* * |
|||
* Global functions and variables unsed and undocumented * |
|||
* * |
|||
*************************************************************************/ |
|||
|
|||
/* bind.c */ |
|||
extern char *rl_untranslate_keyseq __P((int)); |
|||
|
|||
/* kill.c */ |
|||
extern int rl_set_retained_kills __P((int)); |
|||
|
|||
/* readline.c */ |
|||
extern int rl_discard_argument __P((void)); |
|||
|
|||
/* rltty.c */ |
|||
extern int rl_stop_output __P((int, int)); |
|||
|
|||
/* terminal.c */ |
|||
extern void _rl_set_screen_size __P((int, int)); |
|||
|
|||
/* undo.c */ |
|||
extern int _rl_fix_last_undo_of_type __P((int, int, int)); |
|||
|
|||
/* util.c */ |
|||
extern char *_rl_savestring __P((char *)); |
|||
|
|||
/*************************************************************************
|
|||
* * |
|||
* Functions and variables private to the readline library * |
|||
* * |
|||
*************************************************************************/ |
|||
|
|||
/* NOTE: Functions and variables prefixed with `_rl_' are
|
|||
pseudo-global: they are global so they can be shared |
|||
between files in the readline library, but are not intended |
|||
to be visible to readline callers. */ |
|||
|
|||
/*************************************************************************
|
|||
* Undocumented private functions * |
|||
*************************************************************************/ |
|||
|
|||
#if defined(READLINE_CALLBACKS) |
|||
|
|||
/* readline.c */ |
|||
extern void readline_internal_setup __P((void)); |
|||
extern char *readline_internal_teardown __P((int)); |
|||
extern int readline_internal_char __P((void)); |
|||
|
|||
#endif /* READLINE_CALLBACKS */ |
|||
|
|||
/* bind.c */ |
|||
extern void _rl_bind_if_unbound __P((char *, Function *)); |
|||
|
|||
/* display.c */ |
|||
extern char *_rl_strip_prompt __P((char *)); |
|||
extern void _rl_move_cursor_relative __P((int, char *)); |
|||
extern void _rl_move_vert __P((int)); |
|||
extern void _rl_save_prompt __P((void)); |
|||
extern void _rl_restore_prompt __P((void)); |
|||
extern char *_rl_make_prompt_for_search __P((int)); |
|||
extern void _rl_erase_at_end_of_line __P((int)); |
|||
extern void _rl_clear_to_eol __P((int)); |
|||
extern void _rl_clear_screen __P((void)); |
|||
extern void _rl_update_final __P((void)); |
|||
extern void _rl_redisplay_after_sigwinch __P((void)); |
|||
extern void _rl_clean_up_for_exit __P((void)); |
|||
extern void _rl_erase_entire_line __P((void)); |
|||
extern int _rl_currentb_display_line __P((void)); |
|||
|
|||
/* input.c */ |
|||
extern int _rl_any_typein __P((void)); |
|||
extern int _rl_input_available __P((void)); |
|||
extern void _rl_insert_typein __P((int)); |
|||
|
|||
/* macro.c */ |
|||
extern void _rl_with_macro_input __P((char *)); |
|||
extern int _rl_next_macro_key __P((void)); |
|||
extern void _rl_push_executing_macro __P((void)); |
|||
extern void _rl_pop_executing_macro __P((void)); |
|||
extern void _rl_add_macro_char __P((int)); |
|||
extern void _rl_kill_kbd_macro __P((void)); |
|||
|
|||
/* nls.c */ |
|||
extern int _rl_init_eightbit __P((void)); |
|||
|
|||
/* parens.c */ |
|||
extern void _rl_enable_paren_matching __P((int)); |
|||
|
|||
/* readline.c */ |
|||
extern void _rl_init_line_state __P((void)); |
|||
extern void _rl_set_the_line __P((void)); |
|||
extern int _rl_dispatch __P((int, Keymap)); |
|||
extern int _rl_init_argument __P((void)); |
|||
extern void _rl_fix_point __P((int)); |
|||
extern void _rl_replace_text __P((char *, int, int)); |
|||
extern int _rl_char_search_internal __P((int, int, int)); |
|||
extern int _rl_set_mark_at_pos __P((int)); |
|||
|
|||
/* rltty.c */ |
|||
extern int _rl_disable_tty_signals __P((void)); |
|||
extern int _rl_restore_tty_signals __P((void)); |
|||
|
|||
/* terminal.c */ |
|||
extern void _rl_get_screen_size __P((int, int)); |
|||
extern int _rl_init_terminal_io __P((char *)); |
|||
#ifdef _MINIX |
|||
extern void _rl_output_character_function __P((int)); |
|||
#else |
|||
extern int _rl_output_character_function __P((int)); |
|||
#endif |
|||
extern void _rl_output_some_chars __P((char *, int)); |
|||
extern int _rl_backspace __P((int)); |
|||
extern void _rl_enable_meta_key __P((void)); |
|||
extern void _rl_control_keypad __P((int)); |
|||
|
|||
/* util.c */ |
|||
extern int alphabetic __P((int)); |
|||
extern int _rl_abort_internal __P((void)); |
|||
extern char *_rl_strindex __P((char *, char *)); |
|||
extern int _rl_qsort_string_compare __P((char **, char **)); |
|||
extern int (_rl_uppercase_p) __P((int)); |
|||
extern int (_rl_lowercase_p) __P((int)); |
|||
extern int (_rl_pure_alphabetic) __P((int)); |
|||
extern int (_rl_digit_p) __P((int)); |
|||
extern int (_rl_to_lower) __P((int)); |
|||
extern int (_rl_to_upper) __P((int)); |
|||
extern int (_rl_digit_value) __P((int)); |
|||
|
|||
/* vi_mode.c */ |
|||
extern void _rl_vi_initialize_line __P((void)); |
|||
extern void _rl_vi_reset_last __P((void)); |
|||
extern void _rl_vi_set_last __P((int, int, int)); |
|||
extern int _rl_vi_textmod_command __P((int)); |
|||
extern void _rl_vi_done_inserting __P((void)); |
|||
|
|||
/*************************************************************************
|
|||
* Undocumented private variables * |
|||
*************************************************************************/ |
|||
|
|||
/* complete.c */ |
|||
extern int _rl_complete_show_all; |
|||
extern int _rl_complete_mark_directories; |
|||
extern int _rl_print_completions_horizontally; |
|||
extern int _rl_completion_case_fold; |
|||
|
|||
/* display.c */ |
|||
extern int _rl_vis_botlin; |
|||
extern int _rl_last_c_pos; |
|||
extern int _rl_suppress_redisplay; |
|||
extern char *rl_display_prompt; |
|||
|
|||
/* funmap.c */ |
|||
extern char *possible_control_prefixes[]; |
|||
extern char *possible_meta_prefixes[]; |
|||
|
|||
/* isearch.c */ |
|||
extern unsigned char *_rl_isearch_terminators; |
|||
|
|||
/* macro.c */ |
|||
extern int _rl_defining_kbd_macro; |
|||
extern char *_rl_executing_macro; |
|||
|
|||
/* readline.c */ |
|||
extern int _rl_horizontal_scroll_mode; |
|||
extern int _rl_mark_modified_lines; |
|||
extern int _rl_bell_preference; |
|||
extern int _rl_meta_flag; |
|||
extern int _rl_convert_meta_chars_to_ascii; |
|||
extern int _rl_output_meta_chars; |
|||
extern char *_rl_comment_begin; |
|||
extern unsigned char _rl_parsing_conditionalized_out; |
|||
extern Keymap _rl_keymap; |
|||
extern FILE *_rl_in_stream; |
|||
extern FILE *_rl_out_stream; |
|||
extern int _rl_last_command_was_kill; |
|||
extern int _rl_eof_char; |
|||
extern procenv_t readline_top_level; |
|||
|
|||
/* terminal.c */ |
|||
extern int _rl_enable_keypad; |
|||
extern int _rl_enable_meta; |
|||
extern char *term_clreol; |
|||
extern char *term_clrpag; |
|||
extern char *term_im; |
|||
extern char *term_ic; |
|||
extern char *term_ei; |
|||
extern char *term_DC; |
|||
extern char *term_up; |
|||
extern char *term_dc; |
|||
extern char *term_cr; |
|||
extern char *term_IC; |
|||
extern int screenheight; |
|||
extern int screenwidth; |
|||
extern int screenchars; |
|||
extern int terminal_can_insert; |
|||
extern int _rl_term_autowrap; |
|||
|
|||
/* undo.c */ |
|||
extern int _rl_doing_an_undo; |
|||
extern int _rl_undo_group_level; |
|||
|
|||
#endif /* _RL_PRIVATE_H_ */ |
|||
@ -0,0 +1,34 @@ |
|||
/* rlshell.h -- utility functions normally provided by bash. */ |
|||
|
|||
/* Copyright (C) 1999 Free Software Foundation, Inc.
|
|||
|
|||
This file is part of the GNU Readline Library, a library for |
|||
reading lines of text with interactive input and history editing. |
|||
|
|||
The GNU Readline Library 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 2, or |
|||
(at your option) any later version. |
|||
|
|||
The GNU Readline Library 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. |
|||
|
|||
The GNU General Public License is often shipped with GNU software, and |
|||
is generally kept in a file called COPYING or LICENSE. If you do not |
|||
have a copy of the license, write to the Free Software Foundation, |
|||
59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
|||
|
|||
#if !defined (_RL_SHELL_H_) |
|||
#define _RL_SHELL_H_ |
|||
|
|||
#include "rlstdc.h" |
|||
|
|||
extern char *single_quote __P((char *)); |
|||
extern void set_lines_and_columns __P((int, int)); |
|||
extern char *get_env_value __P((char *)); |
|||
extern char *get_home_dir __P((void)); |
|||
extern int unset_nodelay_mode __P((int)); |
|||
|
|||
#endif /* _RL_SHELL_H_ */ |
|||
@ -0,0 +1,46 @@ |
|||
/* xmalloc.h -- memory allocation that aborts on errors. */ |
|||
|
|||
/* Copyright (C) 1999 Free Software Foundation, Inc.
|
|||
|
|||
This file is part of the GNU Readline Library, a library for |
|||
reading lines of text with interactive input and history editing. |
|||
|
|||
The GNU Readline Library 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 2, or |
|||
(at your option) any later version. |
|||
|
|||
The GNU Readline Library 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. |
|||
|
|||
The GNU General Public License is often shipped with GNU software, and |
|||
is generally kept in a file called COPYING or LICENSE. If you do not |
|||
have a copy of the license, write to the Free Software Foundation, |
|||
59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
|||
|
|||
#if !defined (_XMALLOC_H_) |
|||
#define _XMALLOC_H_ |
|||
|
|||
#if defined (READLINE_LIBRARY) |
|||
# include "rlstdc.h" |
|||
#else |
|||
# include <readline/rlstdc.h> |
|||
#endif |
|||
|
|||
#ifndef PTR_T |
|||
|
|||
#ifdef __STDC__ |
|||
# define PTR_T void * |
|||
#else |
|||
# define PTR_T char * |
|||
#endif |
|||
|
|||
#endif /* !PTR_T */ |
|||
|
|||
extern char *xmalloc __P((int)); |
|||
extern char *xrealloc __P((void *, int)); |
|||
extern void xfree __P((void *)); |
|||
|
|||
#endif /* _XMALLOC_H_ */ |
|||
Loading…
Reference in new issue