From owner-freebsd-hackers@freebsd.org Sat Feb 15 05:38:17 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 915B124EDB7 for ; Sat, 15 Feb 2020 05:38:17 +0000 (UTC) (envelope-from fnoyanisi@yahoo.com) Received: from sonic302-1.consmr.mail.bf2.yahoo.com (sonic302-1.consmr.mail.bf2.yahoo.com [74.6.135.40]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 48KJtw6301z3Jmd for ; Sat, 15 Feb 2020 05:38:16 +0000 (UTC) (envelope-from fnoyanisi@yahoo.com) X-YMail-OSG: h45LMB8VM1mEbO6f4OTjBZ_U5vZcHObBZxr_3p798g_gvcJinASrq.GPcYWkmHX 0sXzJfj1LL66G5C_4.1gaO2fVlSe20LGOX9umDQmqpP0CSkAjbgd0bOPcns3D6E2MGi1Tu24yKhy RnAS12KPR1cwhHjdK4wLE8Vtwr.bKPVrv7YImVP.GUya50V7P_yfBjgWVnKPb4Z8g8dVrg3Lrm_o .DAii18tCwd7JNNxypkjKzEaVMuvAOIQ3IWwc_.mfkE_i7UYh.wtURg2fSm7oylZSQF5gPls2GE0 _cITFnTNc_wK6WtB9l5MRCauZpxQ1OBGmIqn2c3AYuNNJdBAANdQdJ3V5_3XbV5awjlL0TK8LTAd O2UMu_fkiMNew8MfLfOrs2jfMdSfLEE2WJTJYRqdkCWZqwxHnNw2XISZGmK0O868uiu4dNRdWrh0 nQakR.dUwqkgM59mKOoIrPlqD0MAo.aLKHhQjDyAr5iimQVII7a2a1KmZ0N4Ebg7yNzaahVaXj1V ibrFpXyEZOfrYzCkiq20QBE2fVFCDnbAN..udKQZh.WZu5jkfvop.ANb97OrCTjGM5YZQlNSqdaZ YTvQ2XoYgn__gkvBQ.GDEBWGPeS_PdalPK8sYXIC3odTimVA2mEgyjTKrRDHOjsIeQ15H79UzQ0u WTuooYUK8UUUq90iRP36ee7r8j1O_twPGuNMh2fWpjGTFvu.heudY2FsJTQaSciYeF.NwHca8jFP kJ8m8O0B15kjqsK.aSWrnZ2yzqcO5H2VC1uwblCPFd18P.bHkonJrNqEh8cT5Z7bsxGwbi_V4rFW PNGQZKfdItRprVccMpjIyO._odnhVSv4B5CGAweYw3C4v._krNLleIeIgr5HMqmhgk3NSDpiChCX 69_j6Vu.FcWfNCvrg_Elk5CKISeHwezRvQNqAdBrIqzn9dPgwyw0nkT_MrPxJCNJXRNnAtXDTtbQ zhGuL0HjdQ4VCTYIaC6wvEvEUi70lnoYl2VXSpYgfcGvEtYloeXoqTknGcvby1s6whqa37uQBsn6 qRNXV6EXJHGEFEd8dLhYfHlgMzRQqTnnnCHvW4aevL1GucZVXYIT6i4n59..2Odf.sBGS3rd23qY _PcV53XoAqWSHpUM2Am3zT25j7osIRMS2C4nH8upsSKh7Jh_u1t9wsigH8JQMaA8VuY97k69bHcP v1td4PLLyzjDlQFQ2rMg0SuqkHo5KZvJ_YYnuPjp6bLMW1Gmrumal91KjzLudnwZ8rGz4nDVzZoJ QJOhqsrQGsWVkoI6KfHvZWoqgu4lq.CQfrHqE14FcMljcEitJtFb.mb7M_4l_8KQkHJrvN_NT3mB rZMpBKCDCLuAlLLOT6GJafoDS6TPWMVabmsTJIZ_hKNE.u_424RKN_57vGtLk_8f_uThBG65t7C_ V Received: from sonic.gate.mail.ne1.yahoo.com by sonic302.consmr.mail.bf2.yahoo.com with HTTP; Sat, 15 Feb 2020 05:38:15 +0000 Received: by smtp417.mail.bf1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID acb71599ffef527a9ad7b5e46e8d9986; Sat, 15 Feb 2020 05:38:10 +0000 (UTC) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Fehmi Noyan ISI Mime-Version: 1.0 (1.0) Date: Sat, 15 Feb 2020 18:38:03 +1300 Subject: diff(1) -c and -u options Message-Id: <83CB71EA-714E-4C91-9E2B-143A0E222D37@yahoo.com> To: freebsd-hackers@freebsd.org X-Mailer: iPhone Mail (17D50) References: <83CB71EA-714E-4C91-9E2B-143A0E222D37.ref@yahoo.com> X-Rspamd-Queue-Id: 48KJtw6301z3Jmd X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.37 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.88)[-0.881,0]; R_DKIM_ALLOW(-0.20)[yahoo.com:s=s2048]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ptr:yahoo.com]; FREEMAIL_FROM(0.00)[yahoo.com]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-0.98)[-0.984,0]; RCVD_COUNT_TWO(0.00)[2]; RCPT_COUNT_ONE(0.00)[1]; IP_SCORE_FREEMAIL(0.00)[]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[yahoo.com:+]; DMARC_POLICY_ALLOW(-0.50)[yahoo.com,reject]; RCVD_IN_DNSWL_NONE(0.00)[40.135.6.74.list.dnswl.org : 127.0.5.0]; MV_CASE(0.50)[]; IP_SCORE(0.00)[ip: (2.24), ipnet: 74.6.128.0/21(1.27), asn: 26101(1.02), country: US(-0.05)]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[yahoo.com]; ASN(0.00)[asn:26101, ipnet:74.6.128.0/21, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[yahoo.com.dwl.dnswl.org : 127.0.5.0] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 15 Feb 2020 05:38:17 -0000 Hi, I am working on same changes to diff(1) (bug 243975) and noticed that one of= the atf tests does this (in /usr/src/usr.bin/diff/tests/diff_test.sh unifie= d_body()) atf_check -o file:$(atf_get_srcdir)/unified_c9999.out -s eq:1 \ diff -u -c9999 -L input_c1.in -L input_c2.in "$(atf_get_srcdir)/input= _c1.in" "$(atf_get_srcdir)/input_c2.in=E2=80=9D when I try it out myself, -u -cNUM and -cNUM give the same output, making -u= redundant here. GNU diff complains about incompatible output styling when -u -c are passed a= s arguments at the same time. I would assume -u -cNUM was used to limit the number of output lines but the= same can be achieved by -uNUM anyway. I thought about removing this test case since it does not test anyting relat= ed to unified output (-u) (? here) but did not feel comfortable about it and= though it would be worthwhile to send an email to freebsd-hackers first. Any thoughts? Ta Fehmi=