From owner-freebsd-hackers@freebsd.org Wed Dec 6 22:23:41 2017 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 51440E8E1C7; Wed, 6 Dec 2017 22:23:41 +0000 (UTC) (envelope-from asomers@gmail.com) Received: from mail-lf0-x241.google.com (mail-lf0-x241.google.com [IPv6:2a00:1450:4010:c07::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C79216546A; Wed, 6 Dec 2017 22:23:40 +0000 (UTC) (envelope-from asomers@gmail.com) Received: by mail-lf0-x241.google.com with SMTP id f20so6001013lfe.3; Wed, 06 Dec 2017 14:23:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=APkbrG3xZofywJ8qjIraM1jtmVUZ+pJLVuPWHilzzKI=; b=Lh8lp1s2d4t/cG1Hed9rbBezIpQpLfS7tlHIJ+/rLC3/inOXdGm/3uwyt5OO9W2AAs SsMJ36SmCQ83a3+hKcLkbWjaIy2ViekwF3oBX0tMu5SFbGpMHMQ1r1v9+VeeBfM42n57 q87YqOiYFrPiOp4HXfweWhol4YgrjMrPXjY+3UCUKLcENhwQyzaOf2CO1MgofxOLdno7 Gzigd5Jg3K6XTAPQBlw18nWhdgzAuJNbPvI8p6HCe/QqlapvmP2QJRWzyHQaWbme+6Na sH9KX/Vw7W/AQ+c8iFft9EgvJJ+E7j29uokIAyfsAXC4dm7LKhBe/u49BQkM1iYs6XJV e4KA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=APkbrG3xZofywJ8qjIraM1jtmVUZ+pJLVuPWHilzzKI=; b=RpWHW6o71E3JVg0VPqKwfMAzlQ+qZ6MIAptuAvLka6lQoR0GmhcsBkvXsgql5tsPNw F87C8dWIOMiOv/SKd7RLGJ0Da9X7X0ITJuhUSTqCiCRn8gLsfJQsvZFWy6iNG9q92wsk YZ/DQ032W8EwgqO5mxbSzWBwcYEMIxAVK41b7P0TDGBKLPU+Q2xoWCFuLzvETZMR5NUV lDJ85SOskasD5EbB7ZePnRUjt7cVbwYTenvuu5933atyUbrvXpYeqKSgKdxWRZ9wyFRB jJfuVk1Tyzqz0u9DhitkN0jcSDvd8g/QHz4dR/vUPWTKmkcqwp732O9XjgEckD02XihY Yxrw== X-Gm-Message-State: AJaThX6nZKZyTIsW0PDv/zUjR1AE0jYsPH3K+iMIJmjq99J/ClK0vfTM Vr0e8tHZsPVB8J5BqRpGv6mv4XHqHgTcDhtNR3g= X-Google-Smtp-Source: AGs4zMbXTfM91peHPELjflGn3rKilQ5QJdTOlY6/DAkYeqeKM1j+Wg7Mfx5adwHvqp6s1LzlFxj4uT87ToYpC7AfwKM= X-Received: by 10.25.27.18 with SMTP id b18mr10864510lfb.177.1512599013965; Wed, 06 Dec 2017 14:23:33 -0800 (PST) MIME-Version: 1.0 Sender: asomers@gmail.com Received: by 10.179.76.19 with HTTP; Wed, 6 Dec 2017 14:23:33 -0800 (PST) In-Reply-To: <201712062204.vB6M4B03026339@donotpassgo.dyslexicfish.net> References: <620CD9B7-201A-46FD-8C9D-DD8DDA3A05C3@meetlost.com> <201712062204.vB6M4B03026339@donotpassgo.dyslexicfish.net> From: Alan Somers Date: Wed, 6 Dec 2017 15:23:33 -0700 X-Google-Sender-Auth: PbHdgm82FpjFJisFwVRSJ66iRhc Message-ID: Subject: Re: Strange behavior about pattern matching on manual pages [FIXED] To: Jamie Landeg-Jones Cc: FreeBSD CURRENT , "freebsd-hackers@freebsd.org" , by@meetlost.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Dec 2017 22:23:41 -0000 On Wed, Dec 6, 2017 at 3:04 PM, Jamie Landeg-Jones wrote: > by wrote: > > > Hi, > > > > I encounter a problem when viewing manuals via man(1) command. > > > > The case is simple, when I try to search something, I press =E2=80=98/= =E2=80=99, and > then input the pattern, If it got something in the page, it will direct m= e > into the specified place, and then, I continue with =E2=80=99n=E2=80=99, = and it goes well. > > But the problem is, after a sequence of =E2=80=99n=E2=80=99, the screen= go to the end of > the manual pages, and keeping press =E2=80=99n=E2=80=99, I got annoying = =E2=80=9C...skipping...=E2=80=9D, > the page is full of skipping and parts of the end of the manual page. > > Yes. This has been annoying me too - your email prompted me to finally wo= rk > on a fix for it! > > Firstly, it isn't man(1) itself - man(1) uses more(1) as the pager. > more(1) is in itself actually the program less(1), running in "more > emulation mode". > > And less(1) isn't FreeBSD native code - it's imported into the project > from http://www.greenwoodsoftware.com/less/ > > I noticed the very latest version of less(1) has been checked into > freebsd-current, and the issue still occurs there. > > Anyway, the fix is two small patches to less(1), please let me know > if they work for you, and if you see any bad side-effects in man(1) / > more(1) and less(1) and I'll then try and get them applied upstream. > > The patches have been tested against FreeBSD 11.1-STABLE and 12-CURRENT > > cheers! Jamie > > --- contrib/less/forwback.c.orig 2017-11-20 08:52:33.978356000 +00= 00 > +++ contrib/less/forwback.c 2017-12-05 15:53:50.517550000 +0000 > @@ -255,7 +255,7 @@ > * start the display after the beginning of the file, > * and it is not appropriate to squish in that case. > */ > - if ((first_time || less_is_more) && > + if ((first_time) && > pos =3D=3D NULL_POSITION && !top_scroll && > #if TAGS > tagoption =3D=3D NULL && > --- contrib/less/main.c.orig 2017-11-20 08:52:33.978356000 +0000 > +++ contrib/less/main.c 2017-12-05 15:53:57.291394000 +0000 > @@ -168,7 +168,10 @@ > } > > if (less_is_more) > + { > no_init =3D TRUE; > + scan_option("--tilde"); > + } > > #if EDITOR > editor =3D lgetenv("VISUAL"); > > How about just setting MANPAGER=3Dless in your environment?