diff options
Diffstat (limited to 'Linux-PAM/modules/pam_limits')
| -rw-r--r-- | Linux-PAM/modules/pam_limits/Makefile | 37 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/Makefile.am | 34 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/Makefile.in | 736 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/README | 138 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/README.xml | 39 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/limits.conf (renamed from Linux-PAM/modules/pam_limits/limits.skel) | 3 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/limits.conf.5 | 172 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/limits.conf.5.xml | 286 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/pam_limits.8 | 97 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/pam_limits.8.xml | 230 | ||||
| -rw-r--r-- | Linux-PAM/modules/pam_limits/pam_limits.c | 271 | ||||
| -rwxr-xr-x | Linux-PAM/modules/pam_limits/tst-pam_limits | 2 |
12 files changed, 1787 insertions, 258 deletions
diff --git a/Linux-PAM/modules/pam_limits/Makefile b/Linux-PAM/modules/pam_limits/Makefile deleted file mode 100644 index d15fd9f7..00000000 --- a/Linux-PAM/modules/pam_limits/Makefile +++ /dev/null @@ -1,37 +0,0 @@ -# -# $Id: Makefile,v 1.4 2004/09/28 13:48:47 kukuk Exp $ -# -# This Makefile controls a build process of $(TITLE) module for -# Linux-PAM. You should not modify this Makefile (unless you know -# what you are doing!). -# - -include ../../Make.Rules - -TITLE=pam_limits - -ifeq ($(OS),linux) - -LOCAL_CONFILE=./limits.skel -INSTALLED_CONFILE=$(SCONFIGD)/limits.conf - -DEFS=-DDEFAULT_CONF_FILE=\"$(INSTALLED_CONFILE)\" -CFLAGS += $(DEFS) - -MODULE_SIMPLE_INSTALL=bash -f ../install_conf "$(FAKEROOT)" "$(SCONFIGD)" "$(INSTALLED_CONFILE)" "$(TITLE)" "$(LOCAL_CONFILE)" -MODULE_SIMPLE_REMOVE=rm -f $(FAKEROOT)$(INSTALLED_CONFILE) -MODULE_SIMPLE_CLEAN=rm -f ./.ignore_age -ifeq ($(HAVE_LIBCAP),yes) -MODULE_SIMPLE_EXTRALIBS=-lcap -endif - -include ../Simple.Rules - -#else -#include ../dont_makefile -#endif -else - -include ../dont_makefile - -endif diff --git a/Linux-PAM/modules/pam_limits/Makefile.am b/Linux-PAM/modules/pam_limits/Makefile.am new file mode 100644 index 00000000..be2852a9 --- /dev/null +++ b/Linux-PAM/modules/pam_limits/Makefile.am @@ -0,0 +1,34 @@ +# +# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de> +# + +CLEANFILES = *~ + +EXTRA_DIST = README $(MANS) $(XMLS) limits.conf tst-pam_limits + +man_MANS = limits.conf.5 pam_limits.8 +XMLS = README.xml limits.conf.5.xml pam_limits.8.xml + +TESTS = tst-pam_limits + +securelibdir = $(SECUREDIR) +secureconfdir = $(SCONFIGDIR) + +AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \ + -DLIMITS_FILE=\"$(SCONFIGDIR)/limits.conf\" +AM_LDFLAGS = -no-undefined -avoid-version -module \ + -L$(top_builddir)/libpam -lpam +if HAVE_VERSIONING + AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map +endif + +securelib_LTLIBRARIES = pam_limits.la + +secureconf_DATA = limits.conf + +if ENABLE_REGENERATE_MAN +noinst_DATA = README +README: pam_limits.8.xml limits.conf.5.xml +-include $(top_srcdir)/Make.xml.rules +endif + diff --git a/Linux-PAM/modules/pam_limits/Makefile.in b/Linux-PAM/modules/pam_limits/Makefile.in new file mode 100644 index 00000000..a50dbff9 --- /dev/null +++ b/Linux-PAM/modules/pam_limits/Makefile.in @@ -0,0 +1,736 @@ +# Makefile.in generated by automake 1.10 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# +# Copyright (c) 2005, 2006 Thorsten Kukuk <kukuk@suse.de> +# + + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c 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install-man8 \ + install-pdf install-pdf-am install-ps install-ps-am \ + install-secureconfDATA install-securelibLTLIBRARIES \ + install-strip installcheck installcheck-am installdirs \ + maintainer-clean maintainer-clean-generic mostlyclean \ + mostlyclean-compile mostlyclean-generic mostlyclean-libtool \ + pdf pdf-am ps ps-am tags uninstall uninstall-am uninstall-man \ + uninstall-man5 uninstall-man8 uninstall-secureconfDATA \ + uninstall-securelibLTLIBRARIES + +@ENABLE_REGENERATE_MAN_TRUE@README: pam_limits.8.xml limits.conf.5.xml +@ENABLE_REGENERATE_MAN_TRUE@-include $(top_srcdir)/Make.xml.rules +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/Linux-PAM/modules/pam_limits/README b/Linux-PAM/modules/pam_limits/README index 32afb197..adab19df 100644 --- a/Linux-PAM/modules/pam_limits/README +++ b/Linux-PAM/modules/pam_limits/README @@ -1,110 +1,50 @@ +pam_limits — PAM module to limit resources -pam_limits module: - Imposing user limits on login. - -THEORY OF OPERATION: - -First, make a root-only-readable file (/etc/security/limits.conf by -default or INSTALLED_CONFILE defined Makefile) that describes the -resource limits you wish to impose. No limits are imposed on UID 0 -accounts. - -Each line describes a limit for a user in the form: - -<domain> <type> <item> <value> - -Where: -<domain> can be: - - an user name - - a group name, with @group syntax - - the wildcard *, for default entry - -<type> can have the three values: - - "soft" for enforcing the soft limits - - "hard" for enforcing hard limits - - "-" for enforcing both soft and hard limits - -<item> can be one of the following: - - core - limits the core file size (KB) - - data - max data size (KB) - - fsize - maximum filesize (KB) - - memlock - max locked-in-memory address space (KB) - - nofile - max number of open files - - rss - max resident set size (KB) - - stack - max stack size (KB) - - cpu - max CPU time (MIN) - - nproc - max number of processes - - as - address space limit - - maxlogins - max number of logins for this user - - maxsyslogins - max number of logins on the system - - priority - lower the priority by given value (value can be -ve) - - locks - max locked files (Linux 2.4 and higher) - - sigpending - max number of pending signals (Linux 2.6 and higher) - - msgqueue - max memory used by POSIX message queues (bytes) - (Linux 2.6 and higher) - -Note, if you specify a type of '-' but neglect to supply the item and -value fields then the module will never enforce any limits on the -specified user/group etc. . - -Please remember that individual limits have priority over group -limits, so if you impose no limits for admin group, but one of the -members in this group has a limits line, the user will have its limits -set according to this line. - -Also, please note that all limit settings are set PER LOGIN. They are -not global, nor are they permanent (they apply for the session only). - -In the LIMITS_FILE, the # character introduces a comment - the rest of the -line is ignored. - -The pam_limits module does its best to report configuration problems found -in LIMITS_FILE via syslog. - -EXAMPLE configuration file: -=========================== -* soft core 0 -* hard rss 10000 -@student hard nproc 20 -@faculty soft nproc 20 -@faculty hard nproc 50 -ftp hard nproc 0 -@student - maxlogins 4 +━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ + +DESCRIPTION + +The pam_limits PAM module sets limits on the system resources that can be +obtained in a user-session. Users of uid=0 are affected by this limits, too. + +By default limits are taken from the /etc/security/limits.conf config file. + +OPTIONS +change_uid -ARGUMENTS RECOGNIZED: - debug verbose logging + Change real uid to the user for who the limits are set up. Use this option + if you have problems like login not forking a shell for user who has no + processes. Be warned that something else may break when you do this. - conf=/path/to/file the limits configuration file if different from the - one set at compile time. +conf=/path/to/limits.conf - change_uid change real uid to the user for who the limits - are set up. Use this option if you have problems - like login not forking a shell for user who has - no processes. Be warned that something else - may break when you do this. + Indicate an alternative limits.conf style configuration file to override + the default. - utmp_early some broken applications actually allocate a - utmp entry for the user before the user is - admitted to the system. If the service you are - configuring PAM for does this, you can use - this module argument to compensate for this - brokenness. +debug -MODULE SERVICES PROVIDED: - session _open_session and _close_session (blank) + Print debug information. -USAGE: - For the services you need resources limits (login for example) put a - the following line in /etc/pam.conf as the last line for that - service (usually after the pam_unix session line: +utmp_early - login session required /lib/security/pam_limits.so + 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. + +EXAMPLES + +These are some example lines which might be specified in /etc/security/ +limits.conf. + +* soft core 0 +* hard rss 10000 +@student hard nproc 20 +@faculty soft nproc 20 +@faculty hard nproc 50 +ftp hard nproc 0 +@student - maxlogins 4 - Replace "login" for each service you are using this module, replace - "/lib/security" path with your real modules path. -AUTHOR: - Cristian Gafton <gafton@redhat.com> - Thanks to Elliot Lee <sopwith@redhat.com> for his comments on - improving this module, and Jens Sorensen for Linux 2.4 updates. diff --git a/Linux-PAM/modules/pam_limits/README.xml b/Linux-PAM/modules/pam_limits/README.xml new file mode 100644 index 00000000..964a5a21 --- /dev/null +++ b/Linux-PAM/modules/pam_limits/README.xml @@ -0,0 +1,39 @@ +<?xml version="1.0" encoding='UTF-8'?> +<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" +"http://www.docbook.org/xml/4.3/docbookx.dtd" +[ +<!-- +<!ENTITY pamlimits SYSTEM "pam_limits.8.xml"> +--> +<!-- +<!ENTITY limitsconf SYSTEM "limits.conf.5.xml"> +--> +]> + +<article> + + <articleinfo> + + <title> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_limits.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_limits-name"]/*)'/> + </title> + + </articleinfo> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_limits.8.xml" xpointer='xpointer(//refsect1[@id = "pam_limits-description"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_limits.8.xml" xpointer='xpointer(//refsect1[@id = "pam_limits-options"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="limits.conf.5.xml" xpointer='xpointer(//refsect1[@id = "limits.conf-examples"]/*)'/> + </section> + +</article> diff --git a/Linux-PAM/modules/pam_limits/limits.skel b/Linux-PAM/modules/pam_limits/limits.conf index 9ba31b19..c52778b1 100644 --- a/Linux-PAM/modules/pam_limits/limits.skel +++ b/Linux-PAM/modules/pam_limits/limits.conf @@ -28,10 +28,13 @@ # - nproc - max number of processes # - as - address space limit # - maxlogins - max number of logins for this user +# - maxsyslogins - max number of logins on the system # - priority - the priority to run user process with # - locks - max number of file locks the user can hold # - sigpending - max number of pending signals # - msgqueue - max memory used by POSIX message queues (bytes) +# - nice - max nice priority allowed to raise to +# - rtprio - max realtime priority # #<domain> <type> <item> <value> # diff --git a/Linux-PAM/modules/pam_limits/limits.conf.5 b/Linux-PAM/modules/pam_limits/limits.conf.5 new file mode 100644 index 00000000..e6ba853f --- /dev/null +++ b/Linux-PAM/modules/pam_limits/limits.conf.5 @@ -0,0 +1,172 @@ +.\" Title: limits.conf +.\" Author: +.\" Generator: DocBook XSL Stylesheets v1.70.1 <http://docbook.sf.net/> +.\" Date: 06/22/2006 +.\" Manual: Linux\-PAM Manual +.\" Source: Linux\-PAM Manual +.\" +.TH "LIMITS.CONF" "5" "06/22/2006" "Linux\-PAM Manual" "Linux\-PAM Manual" +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.SH "NAME" +limits.conf \- configuration file for the pam_limits module +.SH "DESCRIPTION" +.PP +The syntax of the lines is as follows: +.PP + +\fI<domain>\fR +\fI<type>\fR +\fI<item>\fR +\fI<value>\fR +.PP +The fields listed above should be filled as follows: +.TP 3n +\fB<domain>\fR +.RS 3n +.TP 3n +\(bu +a username +.TP 3n +\(bu +a groupname, with +\fB@group\fR +syntax. This should not be confused with netgroups. +.TP 3n +\(bu +the wildcard +\fB*\fR, for default entry. +.TP 3n +\(bu +the wildcard +\fB%\fR, for maxlogins limit only, can also be used with +\fI%group\fR +syntax. +.RE +.TP 3n +\fB<type>\fR +.RS 3n +.TP 3n +\fBhard\fR +for enforcing +\fBhard\fR +resource limits. These limits are set by the superuser and enforced by the Kernel. The user cannot raise his requirement of system resources above such values. +.TP 3n +\fBsoft\fR +for enforcing +\fBsoft\fR +resource limits. These limits are ones that the user can move up or down within the permitted range by any pre\-exisiting +\fBhard\fR +limits. The values specified with this token can be thought of as +\fIdefault\fR +values, for normal system usage. +.TP 3n +\fB\-\fR +for enforcing both +\fBsoft\fR +and +\fBhard\fR +resource limits together. +.sp +Note, if you specify a type of '\-' but neglect to supply the item and value fields then the module will never enforce any limits on the specified user/group etc. . +.RE +.TP 3n +\fB<item>\fR +.RS 3n +.TP 3n +\fBcore\fR +limits the core file size (KB) +.TP 3n +\fBdata\fR +maximum data size (KB) +.TP 3n +\fBfsize\fR +maximum filesize (KB) +.TP 3n +\fBmemlock\fR +maximum locked\-in\-memory address space (KB) +.TP 3n +\fBnofile\fR +maximum number of open files +.TP 3n +\fBrss\fR +maximum resident set size (KB) +.TP 3n +\fBstack\fR +maximum stack size (KB) +.TP 3n +\fBcpu\fR +maximum CPU time (minutes) +.TP 3n +\fBnproc\fR +maximum number of processes +.TP 3n +\fBas\fR +address space limit +.TP 3n +\fBmaxlogins\fR +maximum number of logins for this user +.TP 3n +\fBmaxsyslogins\fR +maximum number of logins on system +.TP 3n +\fBpriority\fR +the priority to run user process with (negative values boost process priority) +.TP 3n +\fBlocks\fR +maximum locked files (Linux 2.4 and higher) +.TP 3n +\fBsigpending\fR +maximum number of pending signals (Linux 2.6 and higher) +.TP 3n +\fBmsqqueue\fR +maximum memory used by POSIX message queues (bytes) (Linux 2.6 and higher) +.TP 3n +\fBnice\fR +maximum nice priority allowed to raise to (Linux 2.6.12 and higher) +.TP 3n +\fBrtprio\fR +maximum realtime priority allowed for non\-privileged processes (Linux 2.6.12 and higher) +.RE +.PP +In general, individual limits have priority over group limits, so if you impose no limits for +\fIadmin\fR +group, but one of the members in this group have a limits line, the user will have its limits set according to this line. +.PP +Also, please note that all limit settings are set +\fIper login\fR. They are not global, nor are they permanent; existing only for the duration of the session. +.PP +In the +\fIlimits\fR +configuration file, the '\fB#\fR' character introduces a comment \- after which the rest of the line is ignored. +.PP +The pam_limits module does its best to report configuration problems found in its configuration file via +\fBsyslog\fR(3). +.SH "EXAMPLES" +.PP +These are some example lines which might be specified in +\fI/etc/security/limits.conf\fR. +.sp +.RS 3n +.nf +* soft core 0 +* hard rss 10000 +@student hard nproc 20 +@faculty soft nproc 20 +@faculty hard nproc 50 +ftp hard nproc 0 +@student \- maxlogins 4 + +.fi +.RE +.SH "SEE ALSO" +.PP + +\fBpam_limits\fR(8), +\fBpam.d\fR(5), +\fBpam\fR(8) +.SH "AUTHOR" +.PP +pam_limits was initially written by Cristian Gafton <gafton@redhat.com> diff --git a/Linux-PAM/modules/pam_limits/limits.conf.5.xml b/Linux-PAM/modules/pam_limits/limits.conf.5.xml new file mode 100644 index 00000000..28df7381 --- /dev/null +++ b/Linux-PAM/modules/pam_limits/limits.conf.5.xml @@ -0,0 +1,286 @@ +<?xml version="1.0" encoding='UTF-8'?> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" + "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd"> + +<refentry id="limits.conf"> + + <refmeta> + <refentrytitle>limits.conf</refentrytitle> + <manvolnum>5</manvolnum> + <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo> + </refmeta> + + <refnamediv> + <refname>limits.conf</refname> + <refpurpose>configuration file for the pam_limits module</refpurpose> + </refnamediv> + + <refsect1 id='limits.conf-description'> + <title>DESCRIPTION</title> + <para> + The syntax of the lines is as follows: + </para> + <para> + <replaceable><domain></replaceable> <replaceable><type></replaceable> + <replaceable><item></replaceable> <replaceable><value></replaceable> + </para> + <para> + The fields listed above should be filled as follows: + </para> + <variablelist> + <varlistentry> + <term> + <option><domain></option> + </term> + <listitem> + <itemizedlist> + <listitem> + <para> + a username + </para> + </listitem> + <listitem> + <para> + a groupname, with <emphasis remap='B'>@group</emphasis> syntax. + This should not be confused with netgroups. + </para> + </listitem> + <listitem> + <para> + the wildcard <emphasis remap='B'>*</emphasis>, for default entry. + </para> + </listitem> + <listitem> + <para> + the wildcard <emphasis remap='B'>%</emphasis>, for maxlogins limit only, + can also be used with <emphasis remap='b'>%group</emphasis> syntax. + </para> + </listitem> + </itemizedlist> + </listitem> + </varlistentry> + + <varlistentry> + <term> + <option><type></option> + </term> + <listitem> + <variablelist> + <varlistentry> + <term><option>hard</option></term> + <listitem> + <para> + for enforcing <emphasis remap='B'>hard</emphasis> resource limits. + These limits are set by the superuser and enforced by the Kernel. + The user cannot raise his requirement of system resources above such values. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>soft</option></term> + <listitem> + <para> + for enforcing <emphasis remap='B'>soft</emphasis> resource limits. + These limits are ones that the user can move up or down within the + permitted range by any pre-exisiting <emphasis remap='B'>hard</emphasis> + limits. The values specified with this token can be thought of as + <emphasis>default</emphasis> values, for normal system usage. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>-</option></term> + <listitem> + <para> + for enforcing both <emphasis remap='B'>soft</emphasis> and + <emphasis remap='B'>hard</emphasis> resource limits together. + </para> + <para> + Note, if you specify a type of '-' but neglect to supply the + item and value fields then the module will never enforce any + limits on the specified user/group etc. . + </para> + </listitem> + </varlistentry> + </variablelist> + </listitem> + </varlistentry> + + <varlistentry> + <term> + <option><item></option> + </term> + <listitem> + <variablelist> + <varlistentry> + <term><option>core</option></term> + <listitem> + <para>limits the core file size (KB)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>data</option></term> + <listitem> + <para>maximum data size (KB)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>fsize</option></term> + <listitem> + <para>maximum filesize (KB)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>memlock</option></term> + <listitem> + <para>maximum locked-in-memory address space (KB)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>nofile</option></term> + <listitem> + <para>maximum number of open files</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>rss</option></term> + <listitem> + <para>maximum resident set size (KB)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>stack</option></term> + <listitem> + <para>maximum stack size (KB)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>cpu</option></term> + <listitem> + <para>maximum CPU time (minutes)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>nproc</option></term> + <listitem> + <para>maximum number of processes</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>as</option></term> + <listitem> + <para>address space limit</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>maxlogins</option></term> + <listitem> + <para>maximum number of logins for this user</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>maxsyslogins</option></term> + <listitem> + <para>maximum number of logins on system</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>priority</option></term> + <listitem> + <para>the priority to run user process with (negative + values boost process priority)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>locks</option></term> + <listitem> + <para>maximum locked files (Linux 2.4 and higher)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>sigpending</option></term> + <listitem> + <para>maximum number of pending signals (Linux 2.6 and higher)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>msqqueue</option></term> + <listitem> + <para>maximum memory used by POSIX message queues (bytes) + (Linux 2.6 and higher)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>nice</option></term> + <listitem> + <para>maximum nice priority allowed to raise to (Linux 2.6.12 and higher)</para> + </listitem> + </varlistentry> + <varlistentry> + <term><option>rtprio</option></term> + <listitem> + <para>maximum realtime priority allowed for non-privileged processes + (Linux 2.6.12 and higher)</para> + </listitem> + </varlistentry> + </variablelist> + </listitem> + </varlistentry> + + </variablelist> + <para> + In general, individual limits have priority over group limits, so if + you impose no limits for <emphasis>admin</emphasis> group, but one of + the members in this group have a limits line, the user will have its + limits set according to this line. + </para> + <para> + Also, please note that all limit settings are set + <emphasis>per login</emphasis>. They are not global, nor are they + permanent; existing only for the duration of the session. + </para> + <para> + In the <emphasis>limits</emphasis> configuration file, the + '<emphasis remap='B'>#</emphasis>' character introduces a comment + - after which the rest of the line is ignored. + </para> + <para> + The pam_limits module does its best to report configuration problems + found in its configuration file via <citerefentry> + <refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>. + </para> + </refsect1> + + <refsect1 id="limits.conf-examples"> + <title>EXAMPLES</title> + <para> + These are some example lines which might be specified in + <filename>/etc/security/limits.conf</filename>. + </para> + <programlisting> +* soft core 0 +* hard rss 10000 +@student hard nproc 20 +@faculty soft nproc 20 +@faculty hard nproc 50 +ftp hard nproc 0 +@student - maxlogins 4 + </programlisting> + </refsect1> + + <refsect1 id="limits.conf-see_also"> + <title>SEE ALSO</title> + <para> + <citerefentry><refentrytitle>pam_limits</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum></citerefentry> + </para> + </refsect1> + + <refsect1 id="limits.conf-author"> + <title>AUTHOR</title> + <para> + pam_limits was initially written by Cristian Gafton <gafton@redhat.com> + </para> + </refsect1> +</refentry> diff --git a/Linux-PAM/modules/pam_limits/pam_limits.8 b/Linux-PAM/modules/pam_limits/pam_limits.8 new file mode 100644 index 00000000..9083e14d --- /dev/null +++ b/Linux-PAM/modules/pam_limits/pam_limits.8 @@ -0,0 +1,97 @@ +.\" Title: pam_limits +.\" Author: +.\" Generator: DocBook XSL Stylesheets v1.70.1 <http://docbook.sf.net/> +.\" Date: 06/17/2006 +.\" Manual: Linux\-PAM Manual +.\" Source: Linux\-PAM Manual +.\" +.TH "PAM_LIMITS" "8" "06/17/2006" "Linux\-PAM Manual" "Linux\-PAM Manual" +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.SH "NAME" +pam_limits \- PAM module to limit resources +.SH "SYNOPSIS" +.HP 14 +\fBpam_limits.so\fR [change_uid] [conf=\fI/path/to/limits.conf\fR] [debug] [utmp_early] +.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 +\fI/etc/security/limits.conf\fR +config file. +.SH "OPTIONS" +.TP 3n +\fBchange_uid\fR +Change real uid to the user for who the limits are set up. Use this option if you have problems like login not forking a shell for user who has no processes. Be warned that something else may break when you do this. +.TP 3n +\fBconf=\fR\fB\fI/path/to/limits.conf\fR\fR +Indicate an alternative limits.conf style configuration file to override the default. +.TP 3n +\fBdebug\fR +Print debug information. +.TP 3n +\fButmp_early\fR +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. +.SH "MODULE SERVICES PROVIDED" +.PP +Only the +\fBsession\fR +service is supported. +.SH "RETURN VALUES" +.TP 3n +PAM_ABORT +Cannot get current limits. +.TP 3n +PAM_IGNORE +No limits found for this user. +.TP 3n +PAM_PERM_DENIED +New limits could not be set. +.TP 3n +PAM_SERVICE_ERR +Cannot read config file. +.TP 3n +PAM_SESSEION_ERR +Error recovering account name. +.TP 3n +PAM_SUCCESS +Limits were changed. +.TP 3n +PAM_USER_UNKNOWN +The user is not known to the system. +.SH "FILES" +.TP 3n +\fI/etc/security/limits.conf\fR +Default configuration file +.SH "EXAMPLES" +.PP +For the services you need resources limits (login for example) put a the following line in +\fI/etc/pam.d/login\fR +as the last line for that service (usually after the pam_unix session line): +.sp +.RS 3n +.nf +#%PAM\-1.0 +# +# Resource limits imposed on login sessions via pam_limits +# +session required pam_limits.so + +.fi +.RE +.PP +Replace "login" for each service you are using this module. +.SH "SEE ALSO" +.PP + +\fBlimits.conf\fR(5), +\fBpam.d\fR(8), +\fBpam\fR(8). +.SH "AUTHORS" +.PP +pam_limits was initially written by Cristian Gafton <gafton@redhat.com> diff --git a/Linux-PAM/modules/pam_limits/pam_limits.8.xml b/Linux-PAM/modules/pam_limits/pam_limits.8.xml new file mode 100644 index 00000000..78060a20 --- /dev/null +++ b/Linux-PAM/modules/pam_limits/pam_limits.8.xml @@ -0,0 +1,230 @@ +<?xml version="1.0" encoding="ISO-8859-1"?> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" + "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> + +<refentry id='pam_limits'> + + <refmeta> + <refentrytitle>pam_limits</refentrytitle> + <manvolnum>8</manvolnum> + <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo> + </refmeta> + + <refnamediv id='pam_limits-name'> + <refname>pam_limits</refname> + <refpurpose> + PAM module to limit resources + </refpurpose> + </refnamediv> + +<!-- body begins here --> + + <refsynopsisdiv> + <cmdsynopsis id="pam_limits-cmdsynopsis"> + <command>pam_limits.so</command> + <arg choice="opt"> + change_uid + </arg> + <arg choice="opt"> + conf=<replaceable>/path/to/limits.conf</replaceable> + </arg> + <arg choice="opt"> + debug + </arg> + <arg choice="opt"> + utmp_early + </arg> + </cmdsynopsis> + </refsynopsisdiv> + + + <refsect1 id="pam_limits-description"> + <title>DESCRIPTION</title> + <para> + The pam_limits PAM module sets limits on the system resources that can be + obtained in a user-session. Users of <emphasis>uid=0</emphasis> are affected + by this limits, too. + </para> + <para> + By default limits are taken from the <filename>/etc/security/limits.conf</filename> + config file. + </para> + </refsect1> + + <refsect1 id="pam_limits-options"> + <title>OPTIONS</title> + <variablelist> + <varlistentry> + <term> + <option>change_uid</option> + </term> + <listitem> + <para> + Change real uid to the user for who the limits are set up. Use this + option if you have problems like login not forking a shell for user + who has no processes. Be warned that something else may break when + you do this. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>conf=<replaceable>/path/to/limits.conf</replaceable></option> + </term> + <listitem> + <para> + Indicate an alternative limits.conf style configuration file to + override the default. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>debug</option> + </term> + <listitem> + <para> + Print debug information. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>utmp_early</option> + </term> + <listitem> + <para> + 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. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id="pam_limits-services"> + <title>MODULE SERVICES PROVIDED</title> + <para> + Only the <option>session</option> service is supported. + </para> + </refsect1> + + <refsect1 id="pam_limits-return_values"> + <title>RETURN VALUES</title> + <variablelist> + <varlistentry> + <term>PAM_ABORT</term> + <listitem> + <para> + Cannot get current limits. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_IGNORE</term> + <listitem> + <para> + No limits found for this user. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_PERM_DENIED</term> + <listitem> + <para> + New limits could not be set. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_SERVICE_ERR</term> + <listitem> + <para> + Cannot read config file. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_SESSEION_ERR</term> + <listitem> + <para> + Error recovering account name. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_SUCCESS</term> + <listitem> + <para> + Limits were changed. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term>PAM_USER_UNKNOWN</term> + <listitem> + <para> + The user is not known to the system. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id="pam_limits-files"> + <title>FILES</title> + <variablelist> + <varlistentry> + <term><filename>/etc/security/limits.conf</filename></term> + <listitem> + <para>Default configuration file</para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1 id='pam_limits-examples'> + <title>EXAMPLES</title> + <para> + For the services you need resources limits (login for example) put a + the following line in <filename>/etc/pam.d/login</filename> as the last + line for that service (usually after the pam_unix session line): + </para> + <programlisting> +#%PAM-1.0 +# +# Resource limits imposed on login sessions via pam_limits +# +session required pam_limits.so + </programlisting> + <para> + Replace "login" for each service you are using this module. + </para> + </refsect1> + + <refsect1 id="pam_limits-see_also"> + <title>SEE ALSO</title> + <para> + <citerefentry> + <refentrytitle>limits.conf</refentrytitle><manvolnum>5</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam.d</refentrytitle><manvolnum>8</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum> + </citerefentry>. + </para> + </refsect1> + + <refsect1 id="pam_limits-authors"> + <title>AUTHORS</title> + <para> + pam_limits was initially written by Cristian Gafton <gafton@redhat.com> + </para> + </refsect1> +</refentry> diff --git a/Linux-PAM/modules/pam_limits/pam_limits.c b/Linux-PAM/modules/pam_limits/pam_limits.c index 1482833a..20aa794a 100644 --- a/Linux-PAM/modules/pam_limits/pam_limits.c +++ b/Linux-PAM/modules/pam_limits/pam_limits.c @@ -13,11 +13,11 @@ * See end for Copyright information */ -#if !(defined(linux)) +#if !defined(linux) && !defined(__linux) #error THIS CODE IS KNOWN TO WORK ONLY ON LINUX !!! #endif -#include <security/_pam_aconf.h> +#include "config.h" #include <stdio.h> #include <unistd.h> @@ -30,6 +30,7 @@ #include <sys/types.h> #include <sys/stat.h> #include <sys/resource.h> +#include <limits.h> #include <utmp.h> #ifndef UT_USER /* some systems have ut_name instead of ut_user */ @@ -60,6 +61,7 @@ static const char *limits_def_names[] = { }; struct user_limits_struct { + int supported; int src_soft; int src_hard; struct rlimit limit; @@ -72,7 +74,6 @@ struct pam_limit_s { int flag_numsyslogins; /* whether to limit logins only for a specific user or to count all logins */ int priority; /* the priority to run user process with */ - int supported[RLIM_NLIMITS]; struct user_limits_struct limits[RLIM_NLIMITS]; char conf_file[BUFSIZ]; int utmp_after_pam_call; @@ -91,19 +92,8 @@ struct pam_limit_s { #include <security/pam_modules.h> #include <security/_pam_macros.h> -#include <security/_pam_modutil.h> - -/* logging */ -static void _pam_log(int err, const char *format, ...) -{ - va_list args; - - va_start(args, format); - openlog("pam_limits", LOG_CONS|LOG_PID, LOG_AUTH); - vsyslog(err, format, args); - va_end(args); - closelog(); -} +#include <security/pam_modutil.h> +#include <security/pam_ext.h> /* argument parsing */ @@ -111,7 +101,9 @@ static void _pam_log(int err, const char *format, ...) #define PAM_DO_SETREUID 0x0002 #define PAM_UTMP_EARLY 0x0004 -static int _pam_parse(int argc, const char **argv, struct pam_limit_s *pl) +static int +_pam_parse (const pam_handle_t *pamh, int argc, const char **argv, + struct pam_limit_s *pl) { int ctrl=0; @@ -129,7 +121,7 @@ static int _pam_parse(int argc, const char **argv, struct pam_limit_s *pl) } else if (!strcmp(*argv,"utmp_early")) { ctrl |= PAM_UTMP_EARLY; } else { - _pam_log(LOG_ERR,"pam_parse: unknown option; %s",*argv); + pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv); } } pl->conf_file[sizeof(pl->conf_file) - 1] = '\0'; @@ -138,13 +130,6 @@ static int _pam_parse(int argc, const char **argv, struct pam_limit_s *pl) } -/* limits stuff */ -#ifdef DEFAULT_CONF_FILE -# define LIMITS_FILE DEFAULT_CONF_FILE -#else -# define LIMITS_FILE "/etc/security/limits.conf" -#endif - #define LIMITED_OK 0 /* limit setting appeared to work */ #define LIMIT_ERR 1 /* error setting a limit */ #define LOGIN_ERR 2 /* too many logins err */ @@ -155,17 +140,17 @@ check_logins (pam_handle_t *pamh, const char *name, int limit, int ctrl, struct pam_limit_s *pl) { struct utmp *ut; - unsigned int count; + int count; if (ctrl & PAM_DEBUG_ARG) { - _pam_log(LOG_DEBUG, "checking logins for '%s' (maximum of %d)\n", - name, limit); + pam_syslog(pamh, LOG_DEBUG, + "checking logins for '%s' (maximum of %d)", name, limit); } if (limit < 0) return 0; /* no limits imposed */ if (limit == 0) /* maximum 0 logins ? */ { - _pam_log(LOG_WARNING, "No logins allowed for '%s'\n", name); + pam_syslog(pamh, LOG_WARNING, "No logins allowed for '%s'", name); return LOGIN_ERR; } @@ -204,7 +189,7 @@ check_logins (pam_handle_t *pamh, const char *name, int limit, int ctrl, continue; } if ((pl->login_limit_def == LIMITS_DEF_ALLGROUP) - && !_pammodutil_user_in_group_nam_nam(pamh, ut->UT_USER, pl->login_group)) { + && !pam_modutil_user_in_group_nam_nam(pamh, ut->UT_USER, pl->login_group)) { continue; } } @@ -215,10 +200,10 @@ check_logins (pam_handle_t *pamh, const char *name, int limit, int ctrl, endutent(); if (count > limit) { if (name) { - _pam_log(LOG_WARNING, "Too many logins (max %d) for %s", - limit, name); + pam_syslog(pamh, LOG_WARNING, + "Too many logins (max %d) for %s", limit, name); } else { - _pam_log(LOG_WARNING, "Too many system logins (max %d)", limit); + pam_syslog(pamh, LOG_WARNING, "Too many system logins (max %d)", limit); } return LOGIN_ERR; } @@ -235,39 +220,43 @@ static int init_limits(struct pam_limit_s *pl) for(i = 0; i < RLIM_NLIMITS; i++) { int r = getrlimit(i, &pl->limits[i].limit); if (r == -1) { - if (errno == EINVAL) { - pl->supported[i] = 0; - } else { + pl->limits[i].supported = 0; + if (errno != EINVAL) { retval = !PAM_SUCCESS; } } else { - pl->supported[i] = 1; + pl->limits[i].supported = 1; pl->limits[i].src_soft = LIMITS_DEF_NONE; pl->limits[i].src_hard = LIMITS_DEF_NONE; } } - pl->priority = 0; + errno = 0; + pl->priority = getpriority (PRIO_PROCESS, 0); + if (pl->priority == -1 && errno != 0) + retval = !PAM_SUCCESS; pl->login_limit = -2; pl->login_limit_def = LIMITS_DEF_NONE; return retval; } -static void process_limit(int source, const char *lim_type, - const char *lim_item, const char *lim_value, - int ctrl, struct pam_limit_s *pl) +static void +process_limit (const pam_handle_t *pamh, int source, const char *lim_type, + const char *lim_item, const char *lim_value, + int ctrl, struct pam_limit_s *pl) { int limit_item; int limit_type = 0; - long limit_value; + int int_value = 0; + rlim_t rlimit_value = 0; char *endptr; const char *value_orig = lim_value; if (ctrl & PAM_DEBUG_ARG) - _pam_log(LOG_DEBUG, "%s: processing %s %s %s for %s\n", - __FUNCTION__,lim_type,lim_item,lim_value, - limits_def_names[source]); + pam_syslog(pamh, LOG_DEBUG, "%s: processing %s %s %s for %s", + __FUNCTION__, lim_type, lim_item, lim_value, + limits_def_names[source]); if (strcmp(lim_item, "cpu") == 0) limit_item = RLIMIT_CPU; @@ -301,6 +290,14 @@ static void process_limit(int source, const char *lim_type, else if (strcmp(lim_item, "msgqueue") == 0) limit_item = RLIMIT_MSGQUEUE; #endif +#ifdef RLIMIT_NICE + else if (strcmp(lim_item, "nice") == 0) + limit_item = RLIMIT_NICE; +#endif +#ifdef RLIMIT_RTPRIO + else if (strcmp(lim_item, "rtprio") == 0) + limit_item = RLIMIT_RTPRIO; +#endif else if (strcmp(lim_item, "maxlogins") == 0) { limit_item = LIMIT_LOGIN; pl->flag_numsyslogins = 0; @@ -310,7 +307,7 @@ static void process_limit(int source, const char *lim_type, } else if (strcmp(lim_item, "priority") == 0) { limit_item = LIMIT_PRI; } else { - _pam_log(LOG_DEBUG,"unknown limit item '%s'", lim_item); + pam_syslog(pamh, LOG_DEBUG, "unknown limit item '%s'", lim_item); return; } @@ -321,40 +318,61 @@ static void process_limit(int source, const char *lim_type, else if (strcmp(lim_type,"-")==0) limit_type=LIMIT_SOFT | LIMIT_HARD; else if (limit_item != LIMIT_LOGIN && limit_item != LIMIT_NUMSYSLOGINS) { - _pam_log(LOG_DEBUG,"unknown limit type '%s'", lim_type); + pam_syslog(pamh, LOG_DEBUG, "unknown limit type '%s'", lim_type); return; } - - limit_value = strtol (lim_value, &endptr, 10); - - /* special case value when limiting logins */ - if (limit_value == 0 && value_orig == endptr) { /* no chars read */ - if (strcmp(lim_value,"-") != 0) { - _pam_log(LOG_DEBUG,"wrong limit value '%s'", lim_value); + if (limit_item != LIMIT_PRI +#ifdef RLIMIT_NICE + && limit_item != RLIMIT_NICE +#endif + && (strcmp(lim_value, "-1") == 0 + || strcmp(lim_value, "-") == 0 || strcmp(lim_value, "unlimited") == 0 + || strcmp(lim_value, "infinity") == 0)) { + int_value = -1; + rlimit_value = RLIM_INFINITY; + } else if (limit_item == LIMIT_PRI || limit_item == LIMIT_LOGIN || +#ifdef RLIMIT_NICE + limit_item == RLIMIT_NICE || +#endif + limit_item == LIMIT_NUMSYSLOGINS) { + long temp; + temp = strtol (lim_value, &endptr, 10); + temp = temp < INT_MAX ? temp : INT_MAX; + int_value = temp > INT_MIN ? temp : INT_MIN; + if (int_value == 0 && value_orig == endptr) { + pam_syslog(pamh, LOG_DEBUG, + "wrong limit value '%s' for limit type '%s'", + lim_value, lim_type); return; - } else - if (limit_item != LIMIT_LOGIN) { - if (ctrl & PAM_DEBUG_ARG) - _pam_log(LOG_DEBUG, - "'-' limit value valid for maxlogins type only"); - return; - } else - limit_value = -1; - } + } + } else { +#ifdef __USE_FILE_OFFSET64 + rlimit_value = strtoull (lim_value, &endptr, 10); +#else + rlimit_value = strtoul (lim_value, &endptr, 10); +#endif + if (rlimit_value == 0 && value_orig == endptr) { + pam_syslog(pamh, LOG_DEBUG, + "wrong limit value '%s' for limit type '%s'", + lim_value, lim_type); + return; + } + } /* one more special case when limiting logins */ if ((source == LIMITS_DEF_ALL || source == LIMITS_DEF_ALLGROUP) && (limit_item != LIMIT_LOGIN)) { if (ctrl & PAM_DEBUG_ARG) - _pam_log(LOG_DEBUG, - "'%%' domain valid for maxlogins type only"); + pam_syslog(pamh, LOG_DEBUG, + "'%%' domain valid for maxlogins type only"); return; } switch(limit_item) { case RLIMIT_CPU: - limit_value *= 60; - break; + if (rlimit_value != RLIM_INFINITY) + rlimit_value *= 60; + break; case RLIMIT_FSIZE: case RLIMIT_DATA: case RLIMIT_STACK: @@ -362,8 +380,16 @@ static void process_limit(int source, const char *lim_type, case RLIMIT_RSS: case RLIMIT_MEMLOCK: case RLIMIT_AS: - limit_value *= 1024; - break; + if (rlimit_value != RLIM_INFINITY) + rlimit_value *= 1024; + break; +#ifdef RLIMIT_NICE + case RLIMIT_NICE: + if (int_value > 19) + int_value = 19; + rlimit_value = 19 - int_value; +#endif + break; } if ( (limit_item != LIMIT_LOGIN) @@ -373,7 +399,7 @@ static void process_limit(int source, const char *lim_type, if (pl->limits[limit_item].src_soft < source) { return; } else { - pl->limits[limit_item].limit.rlim_cur = limit_value; + pl->limits[limit_item].limit.rlim_cur = rlimit_value; pl->limits[limit_item].src_soft = source; } } @@ -381,7 +407,7 @@ static void process_limit(int source, const char *lim_type, if (pl->limits[limit_item].src_hard < source) { return; } else { - pl->limits[limit_item].limit.rlim_max = limit_value; + pl->limits[limit_item].limit.rlim_max = rlimit_value; pl->limits[limit_item].src_hard = source; } } @@ -389,12 +415,12 @@ static void process_limit(int source, const char *lim_type, /* recent kernels support negative priority limits (=raise priority) */ if (limit_item == LIMIT_PRI) { - pl->priority = limit_value; + pl->priority = int_value; } else { if (pl->login_limit_def < source) { return; } else { - pl->login_limit = limit_value; + pl->login_limit = int_value; pl->login_limit_def = source; } } @@ -411,10 +437,11 @@ static int parse_config_file(pam_handle_t *pamh, const char *uname, int ctrl, #define CONF_FILE (pl->conf_file[0])?pl->conf_file:LIMITS_FILE /* check for the LIMITS_FILE */ if (ctrl & PAM_DEBUG_ARG) - _pam_log(LOG_DEBUG,"reading settings from '%s'", CONF_FILE); + pam_syslog(pamh, LOG_DEBUG, "reading settings from '%s'", CONF_FILE); fil = fopen(CONF_FILE, "r"); if (fil == NULL) { - _pam_log (LOG_WARNING, "can not read settings from %s", CONF_FILE); + pam_syslog (pamh, LOG_WARNING, + "cannot read settings from %s: %m", CONF_FILE); return PAM_SERVICE_ERR; } #undef CONF_FILE @@ -427,7 +454,8 @@ static int parse_config_file(pam_handle_t *pamh, const char *uname, int ctrl, char ltype[LINE_LENGTH]; char item[LINE_LENGTH]; char value[LINE_LENGTH]; - int i,j; + int i; + size_t j; char *tptr; tptr = buf; @@ -460,8 +488,6 @@ static int parse_config_file(pam_handle_t *pamh, const char *uname, int ctrl, D(("scanned line[%d]: domain[%s], ltype[%s], item[%s], value[%s]", i, domain, ltype, item, value)); - for(j=0; j < strlen(domain); j++) - domain[j]=tolower(domain[j]); for(j=0; j < strlen(ltype); j++) ltype[j]=tolower(ltype[j]); for(j=0; j < strlen(item); j++) @@ -471,48 +497,51 @@ static int parse_config_file(pam_handle_t *pamh, const char *uname, int ctrl, if (i == 4) { /* a complete line */ if (strcmp(uname, domain) == 0) /* this user have a limit */ - process_limit(LIMITS_DEF_USER, ltype, item, value, ctrl, pl); + process_limit(pamh, LIMITS_DEF_USER, ltype, item, value, ctrl, pl); else if (domain[0]=='@') { if (ctrl & PAM_DEBUG_ARG) { - _pam_log(LOG_DEBUG, "checking if %s is in group %s", - uname, domain + 1); + pam_syslog(pamh, LOG_DEBUG, + "checking if %s is in group %s", + uname, domain + 1); } - if (_pammodutil_user_in_group_nam_nam(pamh, uname, domain+1)) - process_limit(LIMITS_DEF_GROUP, ltype, item, value, ctrl, + if (pam_modutil_user_in_group_nam_nam(pamh, uname, domain+1)) + process_limit(pamh, LIMITS_DEF_GROUP, ltype, item, value, ctrl, pl); } else if (domain[0]=='%') { if (ctrl & PAM_DEBUG_ARG) { - _pam_log(LOG_DEBUG, "checking if %s is in group %s", - uname, domain + 1); + pam_syslog(pamh, LOG_DEBUG, + "checking if %s is in group %s", + uname, domain + 1); } if (strcmp(domain,"%") == 0) - process_limit(LIMITS_DEF_ALL, ltype, item, value, ctrl, + process_limit(pamh, LIMITS_DEF_ALL, ltype, item, value, ctrl, pl); - else if (_pammodutil_user_in_group_nam_nam(pamh, uname, domain+1)) { + else if (pam_modutil_user_in_group_nam_nam(pamh, uname, domain+1)) { strcpy(pl->login_group, domain+1); - process_limit(LIMITS_DEF_ALLGROUP, ltype, item, value, ctrl, + process_limit(pamh, LIMITS_DEF_ALLGROUP, ltype, item, value, ctrl, pl); } } else if (strcmp(domain, "*") == 0) - process_limit(LIMITS_DEF_DEFAULT, ltype, item, value, ctrl, + process_limit(pamh, LIMITS_DEF_DEFAULT, ltype, item, value, ctrl, pl); } else if (i == 2 && ltype[0] == '-') { /* Probably a no-limit line */ if (strcmp(uname, domain) == 0) { if (ctrl & PAM_DEBUG_ARG) { - _pam_log(LOG_DEBUG, "no limits for '%s'", uname); + pam_syslog(pamh, LOG_DEBUG, "no limits for '%s'", uname); } fclose(fil); return PAM_IGNORE; - } else if (domain[0] == '@' && _pammodutil_user_in_group_nam_nam(pamh, uname, domain+1)) { + } else if (domain[0] == '@' && pam_modutil_user_in_group_nam_nam(pamh, uname, domain+1)) { if (ctrl & PAM_DEBUG_ARG) { - _pam_log(LOG_DEBUG, "no limits for '%s' in group '%s'", - uname, domain+1); + pam_syslog(pamh, LOG_DEBUG, + "no limits for '%s' in group '%s'", + uname, domain+1); } fclose(fil); return PAM_IGNORE; } } else { - _pam_log(LOG_DEBUG,"invalid line '%s' - skipped", buf); + pam_syslog(pamh, LOG_WARNING, "invalid line '%s' - skipped", buf); } } fclose(fil); @@ -527,24 +556,18 @@ static int setup_limits(pam_handle_t *pamh, int status; int retval = LIMITED_OK; - if (uid == 0) { - /* do not impose limits (+ve limits anyway) on the superuser */ - if (pl->priority > 0) { - if (ctrl & PAM_DEBUG_ARG) { - _pam_log(LOG_DEBUG, "user '%s' has UID 0 - no limits imposed", - uname); - } - pl->priority = 0; - } - } - for (i=0, status=LIMITED_OK; i<RLIM_NLIMITS; i++) { - if (pl->limits[i].limit.rlim_cur > pl->limits[i].limit.rlim_max) - pl->limits[i].limit.rlim_cur = pl->limits[i].limit.rlim_max; - if (!pl->supported[i]) { + if (!pl->limits[i].supported) { /* skip it if its not known to the system */ continue; } + if (pl->limits[i].src_soft == LIMITS_DEF_NONE && + pl->limits[i].src_hard == LIMITS_DEF_NONE) { + /* skip it if its not initialized */ + continue; + } + if (pl->limits[i].limit.rlim_cur > pl->limits[i].limit.rlim_max) + pl->limits[i].limit.rlim_cur = pl->limits[i].limit.rlim_max; status |= setrlimit(i, &pl->limits[i].limit); } @@ -571,8 +594,9 @@ static int setup_limits(pam_handle_t *pamh, } /* now the session stuff */ -PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, - int argc, const char **argv) +PAM_EXTERN int +pam_sm_open_session (pam_handle_t *pamh, int flags UNUSED, + int argc, const char **argv) { int retval; char *user_name; @@ -584,25 +608,25 @@ PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, memset(&pl, 0, sizeof(pl)); - ctrl = _pam_parse(argc, argv, &pl); + ctrl = _pam_parse(pamh, argc, argv, &pl); retval = pam_get_item( pamh, PAM_USER, (void*) &user_name ); if ( user_name == NULL || retval != PAM_SUCCESS ) { - _pam_log(LOG_CRIT, "open_session - error recovering username"); + pam_syslog(pamh, LOG_CRIT, "open_session - error recovering username"); return PAM_SESSION_ERR; } - pwd = getpwnam(user_name); + pwd = pam_modutil_getpwnam(pamh, user_name); if (!pwd) { if (ctrl & PAM_DEBUG_ARG) - _pam_log(LOG_WARNING, "open_session username '%s' does not exist", - user_name); - return PAM_SESSION_ERR; + pam_syslog(pamh, LOG_WARNING, + "open_session username '%s' does not exist", user_name); + return PAM_USER_UNKNOWN; } retval = init_limits(&pl); if (retval != PAM_SUCCESS) { - _pam_log(LOG_WARNING, "cannot initialize"); - return PAM_IGNORE; + pam_syslog(pamh, LOG_WARNING, "cannot initialize"); + return PAM_ABORT; } retval = parse_config_file(pamh, pwd->pw_name, ctrl, &pl); @@ -611,14 +635,16 @@ PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, return PAM_SUCCESS; } if (retval != PAM_SUCCESS) { - _pam_log(LOG_WARNING, "error parsing the configuration file"); - return PAM_IGNORE; + pam_syslog(pamh, LOG_WARNING, "error parsing the configuration file"); + return retval; } if (ctrl & PAM_DO_SETREUID) { setreuid(pwd->pw_uid, -1); } retval = setup_limits(pamh, pwd->pw_name, pwd->pw_uid, ctrl, &pl); + if (retval & LOGIN_ERR) + pam_error(pamh, _("Too many logins for '%s'."), pwd->pw_name); if (retval != LIMITED_OK) { return PAM_PERM_DENIED; } @@ -626,8 +652,9 @@ PAM_EXTERN int pam_sm_open_session(pam_handle_t *pamh, int flags, return PAM_SUCCESS; } -PAM_EXTERN int pam_sm_close_session(pam_handle_t *pamh, int flags, - int argc, const char **argv) +PAM_EXTERN int +pam_sm_close_session (pam_handle_t *pamh UNUSED, int flags UNUSED, + int argc UNUSED, const char **argv UNUSED) { /* nothing to do */ return PAM_SUCCESS; diff --git a/Linux-PAM/modules/pam_limits/tst-pam_limits b/Linux-PAM/modules/pam_limits/tst-pam_limits new file mode 100755 index 00000000..f563beb7 --- /dev/null +++ b/Linux-PAM/modules/pam_limits/tst-pam_limits @@ -0,0 +1,2 @@ +#!/bin/sh +../../tests/tst-dlopen .libs/pam_limits.so |