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Diffstat (limited to 'modules/pam_limits/pam_limits.8')
| -rw-r--r-- | modules/pam_limits/pam_limits.8 | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/modules/pam_limits/pam_limits.8 b/modules/pam_limits/pam_limits.8 new file mode 100644 index 0000000..50e9a10 --- /dev/null +++ b/modules/pam_limits/pam_limits.8 @@ -0,0 +1,152 @@ +'\" t +.\" Title: pam_limits +.\" Author: [see the "AUTHORS" section] +.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/> +.\" Date: 09/03/2021 +.\" Manual: Linux-PAM Manual +.\" Source: Linux-PAM Manual +.\" Language: English +.\" +.TH "PAM_LIMITS" "8" "09/03/2021" "Linux-PAM Manual" "Linux-PAM Manual" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +pam_limits \- PAM module to limit resources +.SH "SYNOPSIS" +.HP \w'\fBpam_limits\&.so\fR\ 'u +\fBpam_limits\&.so\fR [conf=\fI/path/to/limits\&.conf\fR] [debug] [set_all] [utmp_early] [noaudit] +.SH "DESCRIPTION" +.PP +The pam_limits PAM module sets limits on the system resources that can be obtained in a user\-session\&. Users of +\fIuid=0\fR +are affected by this limits, too\&. +.PP +By default limits are taken from the +/etc/security/limits\&.conf +config file\&. Then individual *\&.conf files from the +/etc/security/limits\&.d/ +directory are read\&. The files are parsed one after another in the order of "C" locale\&. The effect of the individual files is the same as if all the files were concatenated together in the order of parsing\&. If a config file is explicitly specified with a module option then the files in the above directory are not parsed\&. +.PP +The module must not be called by a multithreaded application\&. +.PP +If Linux PAM is compiled with audit support the module will report when it denies access based on limit of maximum number of concurrent login sessions\&. +.SH "OPTIONS" +.PP +\fBconf=\fR\fB\fI/path/to/limits\&.conf\fR\fR +.RS 4 +Indicate an alternative limits\&.conf style configuration file to override the default\&. +.RE +.PP +\fBdebug\fR +.RS 4 +Print debug information\&. +.RE +.PP +\fBset_all\fR +.RS 4 +Set the limits for which no value is specified in the configuration file to the one from the process with the PID 1\&. Please note that if the init process is systemd these limits will not be the kernel default limits and this option should not be used\&. +.RE +.PP +\fButmp_early\fR +.RS 4 +Some broken applications actually allocate a utmp entry for the user before the user is admitted to the system\&. If some of the services you are configuring PAM for do this, you can selectively use this module argument to compensate for this behavior and at the same time maintain system\-wide consistency with a single limits\&.conf file\&. +.RE +.PP +\fBnoaudit\fR +.RS 4 +Do not report exceeded maximum logins count to the audit subsystem\&. +.RE +.SH "MODULE TYPES PROVIDED" +.PP +Only the +\fBsession\fR +module type is provided\&. +.SH "RETURN VALUES" +.PP +PAM_ABORT +.RS 4 +Cannot get current limits\&. +.RE +.PP +PAM_IGNORE +.RS 4 +No limits found for this user\&. +.RE +.PP +PAM_PERM_DENIED +.RS 4 +New limits could not be set\&. +.RE +.PP +PAM_SERVICE_ERR +.RS 4 +Cannot read config file\&. +.RE +.PP +PAM_SESSION_ERR +.RS 4 +Error recovering account name\&. +.RE +.PP +PAM_SUCCESS +.RS 4 +Limits were changed\&. +.RE +.PP +PAM_USER_UNKNOWN +.RS 4 +The user is not known to the system\&. +.RE +.SH "FILES" +.PP +/etc/security/limits\&.conf +.RS 4 +Default configuration file +.RE +.SH "EXAMPLES" +.PP +For the services you need resources limits (login for example) put a the following line in +/etc/pam\&.d/login +as the last line for that service (usually after the pam_unix session line): +.sp +.if n \{\ +.RS 4 +.\} +.nf +#%PAM\-1\&.0 +# +# Resource limits imposed on login sessions via pam_limits +# +session required pam_limits\&.so + +.fi +.if n \{\ +.RE +.\} +.PP +Replace "login" for each service you are using this module\&. +.SH "SEE ALSO" +.PP +\fBlimits.conf\fR(5), +\fBpam.d\fR(5), +\fBpam\fR(8)\&. +.SH "AUTHORS" +.PP +pam_limits was initially written by Cristian Gafton <gafton@redhat\&.com> |