From nobody Wed Jun 25 20:26:04 2025 X-Original-To: freebsd-questions@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4bSCy65hz6z60Tgq for ; Wed, 25 Jun 2025 20:26:06 +0000 (UTC) (envelope-from paul@redbarn.org) Received: from util.redbarn.org (util.redbarn.org [24.104.150.222]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "*.redbarn.org", Issuer "RapidSSL TLS RSA CA G1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4bSCy601tXz3gGS for ; Wed, 25 Jun 2025 20:26:05 +0000 (UTC) (envelope-from paul@redbarn.org) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=redbarn.org header.s=util header.b=YUgcBt0W; spf=pass (mx1.freebsd.org: domain of paul@redbarn.org designates 24.104.150.222 as permitted sender) smtp.mailfrom=paul@redbarn.org; dmarc=pass (policy=reject) header.from=redbarn.org Received: from family.redbarn.org (family.redbarn.org [24.104.150.213]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "*.redbarn.org", Issuer "RapidSSL TLS RSA CA G1" (not verified)) by util.redbarn.org (Postfix) with ESMTPS id EC91B160B99 for ; Wed, 25 Jun 2025 20:26:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=redbarn.org; s=util; t=1750883164; bh=8w/DfyopSgWS49FiN1Cx2t3wu26BDACNY2cqRaJ/iEM=; h=From:To:Subject:Date; b=YUgcBt0WwY/zYc7+aWS0Rck940cTTJWNDcjj7OiRmN0kpDzuFjuDk//TZdDJxHgNO yQHNSbLJjBgZV7GYUQgwQTfIYByHIUMSEGraiiQ7ECOvPZonqS+LacaEiuveE6RJZ5 sJejvwCKZPGDfr1cTUNFvDE8HeEP8nXAsGUl1zBU= Received: from localhost.localnet (dhcp-188.access.rits.tisf.net [24.104.150.188]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by family.redbarn.org (Postfix) with ESMTPSA id CD0179 for ; Wed, 25 Jun 2025 20:26:04 +0000 (UTC) From: Paul Vixie To: FreeBSD Mailing List Subject: two questions about su(1) Date: Wed, 25 Jun 2025 20:26:04 +0000 Message-ID: <2810770.4sosBPzcNG@localhost> Organization: FW List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-questions@freebsd.org Sender: owner-freebsd-questions@FreeBSD.org MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Spamd-Result: default: False [1.09 / 15.00]; DWL_DNSWL_LOW(-1.00)[redbarn.org:dkim]; NEURAL_SPAM_MEDIUM(1.00)[1.000]; NEURAL_SPAM_LONG(0.97)[0.971]; NEURAL_SPAM_SHORT(0.72)[0.720]; MID_RHS_NOT_FQDN(0.50)[]; DMARC_POLICY_ALLOW(-0.50)[redbarn.org,reject]; R_SPF_ALLOW(-0.20)[+ip4:24.104.150.0/24]; R_DKIM_ALLOW(-0.20)[redbarn.org:s=util]; MIME_GOOD(-0.10)[text/plain]; RCVD_IN_DNSWL_LOW(-0.10)[24.104.150.213:received]; TO_DN_ALL(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; ARC_NA(0.00)[]; HAS_ORG_HEADER(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[redbarn.org:+]; MIME_TRACE(0.00)[0:+]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; MLMMJ_DEST(0.00)[freebsd-questions@freebsd.org]; ASN(0.00)[asn:33651, ipnet:24.104.150.0/24, country:US]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEFALL_USER(0.00)[paul]; MISSING_XM_UA(0.00)[]; FROM_HAS_DN(0.00)[] X-Rspamd-Queue-Id: 4bSCy601tXz3gGS X-Spamd-Bar: + first, why is the -c check not applied until after a password is collected? > =E2=9E=9C ~ su -c zsh > Password: > su: only root may use -c second, what exactly do we think this -c restriction is buying us? > =E2=9E=9C ~ su > Password: > root@util:/home/vixie # exec zsh > util# =2D-=20 Paul Vixie