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author | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
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committer | Cameron Katri <me@cameronkatri.com> | 2021-05-09 14:20:58 -0400 |
commit | 5fd83771641d15c418f747bd343ba6738d3875f7 (patch) | |
tree | 5abf0f78f680d9837dbd93d4d4c3933bb7509599 /system_cmds/nologin.tproj/nologin.5 | |
download | apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.gz apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.tar.zst apple_cmds-5fd83771641d15c418f747bd343ba6738d3875f7.zip |
Import macOS userland
adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
Diffstat (limited to 'system_cmds/nologin.tproj/nologin.5')
-rw-r--r-- | system_cmds/nologin.tproj/nologin.5 | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/system_cmds/nologin.tproj/nologin.5 b/system_cmds/nologin.tproj/nologin.5 new file mode 100644 index 0000000..da3b73e --- /dev/null +++ b/system_cmds/nologin.tproj/nologin.5 @@ -0,0 +1,96 @@ +.\" Copyright (c) 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)nologin.8 8.1 (Berkeley) 6/19/93 +.\" $FreeBSD: src/usr.sbin/nologin/nologin.5,v 1.15 2007/05/10 11:22:24 yar Exp $ +.\" +.Dd May 10, 2007 +.Dt NOLOGIN 5 +.Os +.Sh NAME +.Nm nologin +.Nd disallow logins +.Sh DESCRIPTION +Programs such as +.Xr login 1 +disallow logins if the +.Nm +file exists. +The programs display the contents of +.Nm +to the user if possible and interrupt the login sequence. +This makes it simple to temporarily prevent incoming logins systemwide. +.Pp +To disable logins on a per-account basis, +investigate +.Xr nologin 8 . +.Sh SECURITY +The +.Nm +file is ignored for user root by default. +.Sh IMPLEMENTATION NOTES +The +.Nm +feature is implemented through +.Xr login.conf 5 , +which allows to change the pathname of the +file and to extend the list of users +exempt from temporary login restriction. +.Pp +PAM-aware programs can be selectively configured to respect +.Nm +using the +.Xr pam_nologin 8 +module via +.Xr pam.conf 5 . +.Pp +The +.Nm +file will be removed at system boot if it resides in +.Pa /var/run +and +.Va cleanvar_enable +is set to +.Dq Li YES +in +.Xr rc.conf 5 , +which is default. +Therefore system reboot can effectively re-enable logins. +.Sh FILES +.Bl -tag -width ".Pa /var/run/nologin" -compact +.It Pa /var/run/nologin +default location of +.Nm +.El +.Sh SEE ALSO +.Xr login 1 , +.Xr login.conf 5 , +.Xr pam.conf 5 , +.Xr rc.conf 5 , +.Xr nologin 8 , +.Xr pam_nologin 8 , +.Xr shutdown 8 |