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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:22:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:22:51 +0000 |
commit | 9ada0093e92388590c7368600ca4e9e3e376f0d0 (patch) | |
tree | a56fe41110023676d7082028cbaa47ca4b6e6164 /modules/pam_setquota | |
parent | Initial commit. (diff) | |
download | pam-upstream.tar.xz pam-upstream.zip |
Adding upstream version 1.5.2.upstream/1.5.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | modules/pam_setquota/Makefile.am | 29 | ||||
-rw-r--r-- | modules/pam_setquota/Makefile.in | 1146 | ||||
-rw-r--r-- | modules/pam_setquota/README | 80 | ||||
-rw-r--r-- | modules/pam_setquota/README.xml | 41 | ||||
-rw-r--r-- | modules/pam_setquota/pam_setquota.8 | 186 | ||||
-rw-r--r-- | modules/pam_setquota/pam_setquota.8.xml | 301 | ||||
-rw-r--r-- | modules/pam_setquota/pam_setquota.c | 389 | ||||
-rwxr-xr-x | modules/pam_setquota/tst-pam_setquota | 2 |
8 files changed, 2174 insertions, 0 deletions
diff --git a/modules/pam_setquota/Makefile.am b/modules/pam_setquota/Makefile.am new file mode 100644 index 0000000..b01a328 --- /dev/null +++ b/modules/pam_setquota/Makefile.am @@ -0,0 +1,29 @@ +CLEANFILES = *~ +MAINTAINERCLEANFILES = $(MANS) README + +EXTRA_DIST = $(XMLS) + +if HAVE_DOC +dist_man_MANS = pam_setquota.8 +endif +XMLS = README.xml pam_setquota.8.xml +dist_check_SCRIPTS = tst-pam_setquota +TESTS = $(dist_check_SCRIPTS) + +securelibdir = $(SECUREDIR) +secureconfdir = $(SCONFIGDIR) + +AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \ + $(WARN_CFLAGS) +AM_LDFLAGS = -no-undefined -avoid-version -module +if HAVE_VERSIONING + AM_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map +endif + +securelib_LTLIBRARIES = pam_setquota.la +pam_setquota_la_LIBADD = $(top_builddir)/libpam/libpam.la + +if ENABLE_REGENERATE_MAN +dist_noinst_DATA = README +-include $(top_srcdir)/Make.xml.rules +endif diff --git a/modules/pam_setquota/Makefile.in b/modules/pam_setquota/Makefile.in new file mode 100644 index 0000000..f4f49f0 --- /dev/null +++ b/modules/pam_setquota/Makefile.in @@ -0,0 +1,1146 @@ +# Makefile.in generated by automake 1.16.3 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2020 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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Defaults to the + filesystem containing the users home directory. + +overwrite=0 + + Overwrite an existing quota. Note: Enabling this will remove the ability + for the admin to manually configure different quotas for users for a + filesystem with edquota(8). (Defaults to 0) + +debug=0 + + Enable debugging. A value of 1 outputs the old and new quota on a device. A + value of 2 also prints out the matched and found filesystems should fs be + unset. (Defaults to 0) + +startuid=1000 + + Describe the start of the UID range the policy is applied to. (Defaults to + UID_MIN from login.defs or the uidmin value defined at compile-time if + UID_MIN is undefined.) + +enduid=0 + + Describe the end of the UID range the policy is applied to. Setting enduid= + 0 results in an open-ended UID range (i.e. all uids greater than startuid + are included). (Defaults to 0) + +bsoftlimit=19000 + + Soft limit for disk quota blocks, as defined by quotactl(2). Note: + bsoftlimit and bhardlimit must be set at the same time! + +bhardlimit=20000 + + Hard limit for disk quota blocks, as defined by quotactl(2). Note: + bsoftlimit and bhardlimit must be set at the same time! + +isoftlimit=3000 + + Soft limit for inodes, as defined by quotactl(2). Note: isoftlimit and + ihardlimit must be set at the same time! + +ihardlimit=4000 + + Hard limit for inodes, as defined by quotactl(2). Note: isoftlimit and + ihardlimit must be set at the same time! + +EXAMPLES + +A single invocation of `pam_setquota` applies a specific policy to a UID range. +Applying different policies to specific UID ranges is done by invoking +pam_setquota more than once. The last matching entry defines the resulting +quota. + + session required pam_setquota.so bsoftlimit=1000 bhardlimit=2000 isoftlimit=1000 ihardlimit=2000 startuid=1000 enduid=0 fs=/home + session required pam_setquota.so bsoftlimit=19000 bhardlimit=20000 isoftlimit=3000 ihardlimit=4000 startuid=2001 enduid=3000 fs=/dev/sda1 + session required pam_setquota.so bsoftlimit=19000 bhardlimit=20000 isoftlimit=3000 ihardlimit=4000 startuid=3001 enduid=4000 fs=/dev/sda1 overwrite=1 + + +AUTHOR + +pam_setquota was originally written by Ruslan Savchenko <savrus@mexmat.net>. + +Further modifications were made by Shane Tzen <shane@ict.usc.edu>, Sven Hartge +<sven@svenhartge.de> and Keller Fuchs <kellerfuchs@hashbang.sh>. + diff --git a/modules/pam_setquota/README.xml b/modules/pam_setquota/README.xml new file mode 100644 index 0000000..4eeddec --- /dev/null +++ b/modules/pam_setquota/README.xml @@ -0,0 +1,41 @@ +<?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 pamaccess SYSTEM "pam_setquota.8.xml"> +--> +]> + +<article> + + <articleinfo> + + <title> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_setquota.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_setquota-name"]/*)'/> + </title> + + </articleinfo> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_setquota.8.xml" xpointer='xpointer(//refsect1[@id = "pam_setquota-description"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_setquota.8.xml" xpointer='xpointer(//refsect1[@id = "pam_setquota-options"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_setquota.8.xml" xpointer='xpointer(//refsect1[@id = "pam_setquota-examples"]/*)'/> + </section> + + <section> + <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" + href="pam_setquota.8.xml" xpointer='xpointer(//refsect1[@id = "pam_setquota-author"]/*)'/> + </section> + +</article> diff --git a/modules/pam_setquota/pam_setquota.8 b/modules/pam_setquota/pam_setquota.8 new file mode 100644 index 0000000..f09ba96 --- /dev/null +++ b/modules/pam_setquota/pam_setquota.8 @@ -0,0 +1,186 @@ +'\" t +.\" Title: pam_setquota +.\" Author: [see the "AUTHOR" 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_SETQUOTA" "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_setquota \- PAM module to set or modify disk quotas on session start +.SH "SYNOPSIS" +.HP \w'\fBpam_setquota\&.so\fR\ 'u +\fBpam_setquota\&.so\fR [fs=\fI/home\fR] [overwrite=\fI0\fR] [debug=\fI0\fR] [startuid=\fI1000\fR] [enduid=\fI0\fR] [bsoftlimit=\fI19000\fR] [bhardlimit=\fI20000\fR] [isoftlimit=\fI3000\fR] [ihardlimit=\fI4000\fR] +.SH "DESCRIPTION" +.PP +pam_setquota is a PAM module to set or modify a disk quota at session start +.PP +This makes quotas usable with central user databases, such as MySQL or LDAP\&. +.SH "OPTIONS" +.PP +.PP +\fBfs=\fR\fB\fI/home\fR\fR +.RS 4 +The device file or mountpoint the policy applies to\&. Defaults to the filesystem containing the users home directory\&. +.RE +.PP +\fBoverwrite=\fR\fB\fI0\fR\fR +.RS 4 +Overwrite an existing quota\&. Note: Enabling this will remove the ability for the admin to manually configure different quotas for users for a filesystem with +\fBedquota\fR(8)\&. (Defaults to 0) +.RE +.PP +\fBdebug=\fR\fB\fI0\fR\fR +.RS 4 +Enable debugging\&. A value of 1 outputs the old and new quota on a device\&. A value of 2 also prints out the matched and found filesystems should +\fBfs\fR +be unset\&. (Defaults to 0) +.RE +.PP +\fBstartuid=\fR\fB\fI1000\fR\fR +.RS 4 +Describe the start of the UID range the policy is applied to\&. (Defaults to UID_MIN from login\&.defs or the uidmin value defined at compile\-time if UID_MIN is undefined\&.) +.RE +.PP +\fBenduid=\fR\fB\fI0\fR\fR +.RS 4 +Describe the end of the UID range the policy is applied to\&. Setting +\fIenduid=0\fR +results in an open\-ended UID range (i\&.e\&. all uids greater than +\fBstartuid\fR +are included)\&. (Defaults to 0) +.RE +.PP +\fBbsoftlimit=\fR\fB\fI19000\fR\fR +.RS 4 +Soft limit for disk quota blocks, as defined by +\fBquotactl\fR(2)\&. Note: +\fBbsoftlimit\fR +and +\fBbhardlimit\fR +\fImust\fR +be set at the same time! +.RE +.PP +\fBbhardlimit=\fR\fB\fI20000\fR\fR +.RS 4 +Hard limit for disk quota blocks, as defined by +\fBquotactl\fR(2)\&. Note: +\fBbsoftlimit\fR +and +\fBbhardlimit\fR +\fImust\fR +be set at the same time! +.RE +.PP +\fBisoftlimit=\fR\fB\fI3000\fR\fR +.RS 4 +Soft limit for inodes, as defined by +\fB quotactl\fR(2)\&. Note: +\fBisoftlimit\fR +and +\fBihardlimit\fR +\fImust\fR +be set at the same time! +.RE +.PP +\fBihardlimit=\fR\fB\fI4000\fR\fR +.RS 4 +Hard limit for inodes, as defined by +\fB quotactl\fR(2)\&. Note: +\fBisoftlimit\fR +and +\fBihardlimit\fR +\fImust\fR +be set at the same time! +.RE +.SH "MODULE TYPES PROVIDED" +.PP +Only the +\fBsession\fR +module type is provided\&. +.SH "RETURN VALUES" +.PP +.PP +PAM_SUCCESS +.RS 4 +The quota was set successfully\&. +.RE +.PP +PAM_IGNORE +.RS 4 +No action was taken because either the UID of the user was outside of the specified range, a quota already existed and +\fBoverwrite=1\fR +was not configured or no limits were configured at all\&. +.RE +.PP +PAM_USER_UNKNOWN +.RS 4 +The user was not found\&. +.RE +.PP +PAM_PERM_DENIED +.RS 4 +/proc/mounts +could not be opened\&. +.sp +The filesystem or device specified was not found\&. +.sp +The limits for the user could not be retrieved\&. See syslog for more information\&. +.sp +The limits for the user could not be set\&. See syslog for more information\&. +.sp +Either +\fBisoftlimit\fR/\fBihardlimit\fR +or +\fBbsoftlimit\fR/\fBbhardlimit\fR +were not set at the same time\&. +.RE +.SH "EXAMPLES" +.PP +A single invocation of `pam_setquota` applies a specific policy to a UID range\&. Applying different policies to specific UID ranges is done by invoking pam_setquota more than once\&. The last matching entry defines the resulting quota\&. +.sp +.if n \{\ +.RS 4 +.\} +.nf + session required pam_setquota\&.so bsoftlimit=1000 bhardlimit=2000 isoftlimit=1000 ihardlimit=2000 startuid=1000 enduid=0 fs=/home + session required pam_setquota\&.so bsoftlimit=19000 bhardlimit=20000 isoftlimit=3000 ihardlimit=4000 startuid=2001 enduid=3000 fs=/dev/sda1 + session required pam_setquota\&.so bsoftlimit=19000 bhardlimit=20000 isoftlimit=3000 ihardlimit=4000 startuid=3001 enduid=4000 fs=/dev/sda1 overwrite=1 + +.fi +.if n \{\ +.RE +.\} +.sp +.SH "SEE ALSO" +.PP +\fBpam.conf\fR(5), +\fBpam.d\fR(5), +\fBpam\fR(8) +.SH "AUTHOR" +.PP +pam_setquota was originally written by Ruslan Savchenko <savrus@mexmat\&.net>\&. +.PP +Further modifications were made by Shane Tzen <shane@ict\&.usc\&.edu>, Sven Hartge <sven@svenhartge\&.de> and Keller Fuchs <kellerfuchs@hashbang\&.sh>\&. diff --git a/modules/pam_setquota/pam_setquota.8.xml b/modules/pam_setquota/pam_setquota.8.xml new file mode 100644 index 0000000..fe83c80 --- /dev/null +++ b/modules/pam_setquota/pam_setquota.8.xml @@ -0,0 +1,301 @@ +<?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="pam_setquota"> + + <refmeta> + <refentrytitle>pam_setquota</refentrytitle> + <manvolnum>8</manvolnum> + <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo> + </refmeta> + + <refnamediv id="pam_setquota-name"> + <refname>pam_setquota</refname> + <refpurpose>PAM module to set or modify disk quotas on session start</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis id="pam_setquota-cmdsynopsis"> + <command>pam_setquota.so</command> + <arg choice="opt"> + fs=<replaceable>/home</replaceable> + </arg> + <arg choice="opt"> + overwrite=<replaceable>0</replaceable> + </arg> + <arg choice="opt"> + debug=<replaceable>0</replaceable> + </arg> + <arg choice="opt"> + startuid=<replaceable>1000</replaceable> + </arg> + <arg choice="opt"> + enduid=<replaceable>0</replaceable> + </arg> + <arg choice="opt"> + bsoftlimit=<replaceable>19000</replaceable> + </arg> + <arg choice="opt"> + bhardlimit=<replaceable>20000</replaceable> + </arg> + <arg choice="opt"> + isoftlimit=<replaceable>3000</replaceable> + </arg> + <arg choice="opt"> + ihardlimit=<replaceable>4000</replaceable> + </arg> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1 id="pam_setquota-description"> + + <title>DESCRIPTION</title> + + <para> + pam_setquota is a PAM module to set or modify a disk quota at session start + </para> + <para> + This makes quotas usable with central user databases, such as MySQL or LDAP. + </para> + + </refsect1> + + <refsect1 id="pam_setquota-options"> + + <title>OPTIONS</title> + <para> + <variablelist> + <varlistentry> + <term> + <option>fs=<replaceable>/home</replaceable></option> + </term> + <listitem> + <para> + The device file or mountpoint the policy applies to. Defaults to the + filesystem containing the users home directory. + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>overwrite=<replaceable>0</replaceable></option> + </term> + <listitem> + <para> + Overwrite an existing quota. Note: Enabling this will remove the ability + for the admin to manually configure different quotas for users for a + filesystem with <citerefentry><refentrytitle>edquota</refentrytitle> + <manvolnum>8</manvolnum></citerefentry>. (Defaults to 0) + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>debug=<replaceable>0</replaceable></option> + </term> + <listitem> + <para> + Enable debugging. A value of 1 outputs the old and new quota on a device. + A value of 2 also prints out the matched and found filesystems should + <option>fs</option> be unset. (Defaults to 0) + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>startuid=<replaceable>1000</replaceable></option> + </term> + <listitem> + <para> + Describe the start of the UID range the policy is applied to. + (Defaults to UID_MIN from login.defs or the uidmin value defined + at compile-time if UID_MIN is undefined.) + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>enduid=<replaceable>0</replaceable></option> + </term> + <listitem> + <para> + Describe the end of the UID range the policy is applied to. Setting + <emphasis>enduid=0</emphasis> results in an open-ended UID + range (i.e. all uids greater than <option>startuid</option> are + included). (Defaults to 0) + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>bsoftlimit=<replaceable>19000</replaceable></option> + </term> + <listitem> + <para> + Soft limit for disk quota blocks, as defined by <citerefentry> + <refentrytitle>quotactl</refentrytitle><manvolnum>2</manvolnum> + </citerefentry>. + Note: <option>bsoftlimit</option> and <option>bhardlimit</option> + <emphasis>must</emphasis> be set at the same time! + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>bhardlimit=<replaceable>20000</replaceable></option> + </term> + <listitem> + <para> + Hard limit for disk quota blocks, as defined by <citerefentry> + <refentrytitle>quotactl</refentrytitle><manvolnum>2</manvolnum> + </citerefentry>. + Note: <option>bsoftlimit</option> and <option>bhardlimit</option> + <emphasis>must</emphasis> be set at the same time! + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>isoftlimit=<replaceable>3000</replaceable></option> + </term> + <listitem> + <para> + Soft limit for inodes, as defined by <citerefentry><refentrytitle> + quotactl</refentrytitle><manvolnum>2</manvolnum></citerefentry>. + Note: <option>isoftlimit</option> and <option>ihardlimit</option> + <emphasis>must</emphasis> be set at the same time! + </para> + </listitem> + </varlistentry> + <varlistentry> + <term> + <option>ihardlimit=<replaceable>4000</replaceable></option> + </term> + <listitem> + <para> + Hard limit for inodes, as defined by <citerefentry><refentrytitle> + quotactl</refentrytitle><manvolnum>2</manvolnum></citerefentry>. + Note: <option>isoftlimit</option> and <option>ihardlimit</option> + <emphasis>must</emphasis> be set at the same time! + </para> + </listitem> + </varlistentry> + </variablelist> + </para> + </refsect1> + + <refsect1 id="pam_setquota-types"> + <title>MODULE TYPES PROVIDED</title> + <para> + Only the <option>session</option> module type is provided. + </para> + </refsect1> + + <refsect1 id='pam_setquota-return_values'> + <title>RETURN VALUES</title> + <para> + <variablelist> + + <varlistentry> + <term>PAM_SUCCESS</term> + <listitem> + <para> + The quota was set successfully. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>PAM_IGNORE</term> + <listitem> + <para> + No action was taken because either the UID of the user was outside + of the specified range, a quota already existed and + <option>overwrite=1</option> was not configured or no limits were + configured at all. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>PAM_USER_UNKNOWN</term> + <listitem> + <para> + The user was not found. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>PAM_PERM_DENIED</term> + <listitem> + <para> + <filename>/proc/mounts</filename> could not be opened. + </para> + <para> + The filesystem or device specified was not found. + </para> + <para> + The limits for the user could not be retrieved. See syslog for + more information. + </para> + <para> + The limits for the user could not be set. See syslog for + more information. + </para> + <para> + Either <option>isoftlimit</option>/<option>ihardlimit</option> + or <option>bsoftlimit</option>/<option>bhardlimit</option> were + not set at the same time. + </para> + </listitem> + </varlistentry> + + </variablelist> + </para> + </refsect1> + + <refsect1 id='pam_setquota-examples'> + <title>EXAMPLES</title> + <para> + A single invocation of `pam_setquota` applies a specific policy to a UID + range. Applying different policies to specific UID ranges is done by + invoking pam_setquota more than once. The last matching entry + defines the resulting quota. + <programlisting> + session required pam_setquota.so bsoftlimit=1000 bhardlimit=2000 isoftlimit=1000 ihardlimit=2000 startuid=1000 enduid=0 fs=/home + session required pam_setquota.so bsoftlimit=19000 bhardlimit=20000 isoftlimit=3000 ihardlimit=4000 startuid=2001 enduid=3000 fs=/dev/sda1 + session required pam_setquota.so bsoftlimit=19000 bhardlimit=20000 isoftlimit=3000 ihardlimit=4000 startuid=3001 enduid=4000 fs=/dev/sda1 overwrite=1 + </programlisting> + </para> + </refsect1> + + <refsect1 id='pam_setquota-see_also'> + <title>SEE ALSO</title> + <para> + <citerefentry> + <refentrytitle>pam.conf</refentrytitle><manvolnum>5</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum> + </citerefentry>, + <citerefentry> + <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum> + </citerefentry> + </para> + </refsect1> + + <refsect1 id='pam_setquota-author'> + <title>AUTHOR</title> + <para> + pam_setquota was originally written by + Ruslan Savchenko <savrus@mexmat.net>. + </para> + <para> + Further modifications were made by Shane Tzen <shane@ict.usc.edu>, + Sven Hartge <sven@svenhartge.de> + and Keller Fuchs <kellerfuchs@hashbang.sh>. + </para> + </refsect1> + +</refentry> diff --git a/modules/pam_setquota/pam_setquota.c b/modules/pam_setquota/pam_setquota.c new file mode 100644 index 0000000..ec45baa --- /dev/null +++ b/modules/pam_setquota/pam_setquota.c @@ -0,0 +1,389 @@ +/* PAM setquota module + + This PAM module sets disk quota when a session begins. + + Copyright © 2006 Ruslan Savchenko <savrus@mexmat.net> + Copyright © 2010 Shane Tzen <shane@ict.usc.edu> + Copyright © 2012-2020 Sven Hartge <sven@svenhartge.de> + Copyright © 2016 Keller Fuchs <kellerfuchs@hashbang.sh> +*/ + +#include <sys/types.h> +#include <sys/quota.h> +#include <linux/quota.h> +#include <pwd.h> +#include <syslog.h> +#include <errno.h> +#include <mntent.h> +#include <stdio.h> +#include <stdbool.h> + +#include <security/pam_modules.h> +#include <security/_pam_macros.h> +#include <security/pam_ext.h> +#include <security/pam_modutil.h> +#include "pam_inline.h" + +#ifndef PATH_LOGIN_DEFS +# define PATH_LOGIN_DEFS "/etc/login.defs" +#endif + +#define MAX_UID_VALUE 0xFFFFFFFFUL + +struct pam_params { + uid_t start_uid; + uid_t end_uid; + const char *fs; + size_t fs_len; + int overwrite; + int debug; +}; + +static inline void +debug(pam_handle_t *pamh, const struct if_dqblk *p, + const char *device, const char *dbgprefix) { + pam_syslog(pamh, LOG_DEBUG, "%s device=%s bsoftlimit=%llu bhardlimit=%llu " + "isoftlimit=%llu ihardlimit=%llu btime=%llu itime=%llu", + dbgprefix, device, + (unsigned long long) p->dqb_bsoftlimit, + (unsigned long long) p->dqb_bhardlimit, + (unsigned long long) p->dqb_isoftlimit, + (unsigned long long) p->dqb_ihardlimit, + (unsigned long long) p->dqb_btime, + (unsigned long long) p->dqb_itime); +} + +static unsigned long long +str_to_dqb_num(pam_handle_t *pamh, const char *str, const char *param) { + char *ep = NULL; + + errno = 0; + long long temp = strtoll(str, &ep, 10); + if (temp < 0 || str == ep || *ep != '\0' || errno !=0) { + pam_syslog(pamh, LOG_ERR, "Parameter \"%s=%s\" invalid, setting to 0", param, str); + return 0; + } + else { + return temp; + } +} + +static bool +parse_dqblk(pam_handle_t *pamh, int argc, const char **argv, struct if_dqblk *p) { + bool bhard = false, bsoft = false, ihard = false, isoft = false; + + /* step through arguments */ + for (; argc-- > 0; ++argv) { + const char *str; + if ((str = pam_str_skip_prefix(*argv, "bhardlimit=")) != NULL) { + p->dqb_bhardlimit = str_to_dqb_num(pamh, str, "bhardlimit"); + p->dqb_valid |= QIF_BLIMITS; + bhard = true; + } else if ((str = pam_str_skip_prefix(*argv, "bsoftlimit=")) != NULL) { + p->dqb_bsoftlimit = str_to_dqb_num(pamh, str, "bsoftlimit"); + p->dqb_valid |= QIF_BLIMITS; + bsoft = true; + } else if ((str = pam_str_skip_prefix(*argv, "ihardlimit=")) != NULL) { + p->dqb_ihardlimit = str_to_dqb_num(pamh, str, "ihardlimit"); + p->dqb_valid |= QIF_ILIMITS; + ihard = true; + } else if ((str = pam_str_skip_prefix(*argv, "isoftlimit=")) != NULL) { + p->dqb_isoftlimit = str_to_dqb_num(pamh, str, "isoftlimit"); + p->dqb_valid |= QIF_ILIMITS; + isoft = true; + } else if ((str = pam_str_skip_prefix(*argv, "btime=")) != NULL) { + p->dqb_btime = str_to_dqb_num(pamh, str, "btime"); + p->dqb_valid |= QIF_BTIME; + } else if ((str = pam_str_skip_prefix(*argv, "itime=")) != NULL) { + p->dqb_itime = str_to_dqb_num(pamh, str, "itime"); + p->dqb_valid |= QIF_ITIME; + } + } + + /* return FALSE if a softlimit or hardlimit has been set + * independently of its counterpart. + */ + return !(bhard ^ bsoft) && !(ihard ^ isoft); +} + +/* inspired by pam_usertype_get_id */ +static uid_t +str_to_uid(pam_handle_t *pamh, const char *value, uid_t default_value, const char *param) { + unsigned long ul; + char *ep; + uid_t uid; + + errno = 0; + ul = strtoul(value, &ep, 10); + if (!(ul >= MAX_UID_VALUE + || (uid_t)ul >= MAX_UID_VALUE + || (errno != 0 && ul == 0) + || value == ep + || *ep != '\0')) { + uid = (uid_t)ul; + } else { + pam_syslog(pamh, LOG_ERR, "Parameter \"%s=%s\" invalid, " + "setting to %u", param, value, default_value); + uid = default_value; + } + + return uid; +} + +static void +parse_params(pam_handle_t *pamh, int argc, const char **argv, struct pam_params *p) { + /* step through arguments */ + for (; argc-- > 0; ++argv) { + const char *str; + char *ep = NULL; + if ((str = pam_str_skip_prefix(*argv, "startuid=")) != NULL) { + p->start_uid = str_to_uid(pamh, str, p->start_uid, "startuid"); + } else if ((str = pam_str_skip_prefix(*argv, "enduid=")) != NULL) { + p->end_uid = str_to_uid(pamh, str, p->end_uid, "enduid"); + } else if ((str = pam_str_skip_prefix(*argv, "fs=")) != NULL) { + p->fs = str; + p->fs_len = strlen(str); + /* Mask the unnecessary '/' from the end of fs parameter */ + if (p->fs_len > 1 && p->fs[p->fs_len - 1] == '/') + --p->fs_len; + } else if ((str = pam_str_skip_prefix(*argv, "overwrite=")) != NULL) { + errno = 0; + p->overwrite = strtol(str, &ep, 10); + if (*ep != '\0' || str == ep || errno !=0 || (p->overwrite < 0)) { + pam_syslog(pamh, LOG_ERR, "Parameter \"overwrite=%s\" invalid, " + "setting to 0", str); + p->overwrite = 0; + } + } else if ((str = pam_str_skip_prefix(*argv, "debug=")) != NULL) { + errno = 0; + p->debug = strtol(str, &ep, 10); + if (*ep != '\0' || str == ep || errno != 0 || (p->debug < 0)) { + pam_syslog(pamh, LOG_ERR, "Parameter \"debug=%s\" invalid, " + "setting to 0", str); + p->debug = 0; + } + } + } +} + +int +pam_sm_open_session(pam_handle_t *pamh, int flags UNUSED, + int argc, const char **argv) +{ + int retval; + char *val, *mntdevice = NULL; + const void *user; + const struct passwd *pwd; + struct pam_params param = { + .start_uid = PAM_USERTYPE_UIDMIN, + .end_uid = 0, + .fs = NULL }; + struct if_dqblk ndqblk; + FILE *fp; + size_t mnt_len = 0, match_size = 0; +#ifdef HAVE_GETMNTENT_R + char buf[BUFSIZ]; + struct mntent ent; +#endif + const struct mntent *mnt; + const char *service; + + if (pam_get_item(pamh, PAM_SERVICE, (const void **)&service) != PAM_SUCCESS) + service = ""; + + /* Get UID_MIN for default start_uid from login.defs */ + val = pam_modutil_search_key(pamh, PATH_LOGIN_DEFS, "UID_MIN"); + + /* Should UID_MIN be undefined, use current value of param.start_uid + * pre-defined as PAM_USERTYPE_UIDMIN set by configure as safe + * starting UID to avoid setting a quota for root and system + * users if startuid= parameter is absent. + */ + if (val) { + param.start_uid = str_to_uid(pamh, val, param.start_uid, PATH_LOGIN_DEFS":UID_MIN"); + } + + /* Parse parameter values + * Must come after pam_modutil_search_key so that the current system + * default for UID_MIN is already in p.start_uid to serve as default + * for str_to_uid in case of a parse error. + * */ + parse_params(pamh, argc, argv, ¶m); + + if (param.debug >= 1) + pam_syslog(pamh, LOG_DEBUG, "Config: startuid=%u enduid=%u fs=%s " + "debug=%d overwrite=%d", + param.start_uid, param.end_uid, + param.fs ? param.fs : "(none)", + param.debug, param.overwrite); + + /* Determine the user name so we can get the home directory */ + retval = pam_get_item(pamh, PAM_USER, &user); + if (retval != PAM_SUCCESS || user == NULL || *(const char *)user == '\0') { + pam_syslog(pamh, LOG_NOTICE, "user unknown"); + return PAM_USER_UNKNOWN; + } + + /* Get the password entry */ + pwd = pam_modutil_getpwnam(pamh, user); + if (pwd == NULL) { + pam_syslog(pamh, LOG_NOTICE, "user unknown"); + return PAM_USER_UNKNOWN; + } + + /* Check if we should not set quotas for user */ + if ((pwd->pw_uid < param.start_uid) || + ((param.end_uid >= param.start_uid) && (param.start_uid != 0) && + (pwd->pw_uid > param.end_uid))) + return PAM_SUCCESS; + + /* Find out what device the filesystem is hosted on */ + if ((fp = setmntent("/proc/mounts", "r")) == NULL) { + pam_syslog(pamh, LOG_ERR, "Unable to open /proc/mounts"); + return PAM_PERM_DENIED; + } + + while ( +#ifdef HAVE_GETMNTENT_R + (mnt = getmntent_r(fp, &ent, buf, sizeof(buf))) != NULL +#else + (mnt = getmntent(fp)) != NULL +#endif + ) { + /* If param.fs is not specified use filesystem with users homedir + * as default. + */ + if (param.fs == NULL) { + /* Mask trailing / from mnt->mnt_dir, to get a leading / on the + * remaining suffix returned by pam_str_skip_prefix_len() + */ + for (mnt_len = strlen(mnt->mnt_dir); mnt_len > 0; --mnt_len) + if (mnt->mnt_dir[mnt_len - 1] != '/') + break; + const char *s; + if (param.debug >= 2) + pam_syslog(pamh, LOG_DEBUG, "Trying to match pw_dir=\"%s\" " + "with mnt_dir=\"%s\"", pwd->pw_dir, mnt->mnt_dir); + /* + * (mnt_len > match_size) Only try matching the mnt_dir if its length + * is longer than the last matched length, trying to find the longest + * mnt_dir for a given pwd_dir. + * + * (mnt_len == 0 && mnt->mnt_dir[0] == '/') special-cases the + * root-dir /, which is the only mnt_dir with a trailing '/', which + * got masked earlier. + */ + if ((mnt_len > match_size || (mnt_len == 0 && mnt->mnt_dir[0] == '/')) && + (s = pam_str_skip_prefix_len(pwd->pw_dir, mnt->mnt_dir, mnt_len)) != NULL && + s[0] == '/') { + free(mntdevice); + if ((mntdevice = strdup(mnt->mnt_fsname)) == NULL) { + pam_syslog(pamh, LOG_CRIT, "Memory allocation error"); + endmntent(fp); + return PAM_PERM_DENIED; + } + match_size = mnt_len; + if (param.debug >= 2) + pam_syslog(pamh, LOG_DEBUG, "Found pw_dir=\"%s\" in mnt_dir=\"%s\" " + "with suffix=\"%s\" on device=\"%s\"", pwd->pw_dir, + mnt->mnt_dir, s, mntdevice); + } + /* param.fs has been specified, find exactly matching filesystem */ + } else if ((strncmp(param.fs, mnt->mnt_dir, param.fs_len) == 0 + && mnt->mnt_dir[param.fs_len] == '\0') || + (strncmp(param.fs, mnt->mnt_fsname, param.fs_len) == 0 + && mnt->mnt_fsname[param.fs_len] == '\0' )) { + free(mntdevice); + if ((mntdevice = strdup(mnt->mnt_fsname)) == NULL) { + pam_syslog(pamh, LOG_CRIT, "Memory allocation error"); + endmntent(fp); + return PAM_PERM_DENIED; + } + if (param.debug >= 2) + pam_syslog(pamh, LOG_DEBUG, "Found fs=\"%s\" in mnt_dir=\"%s\" " + "on device=\"%s\"", param.fs, mnt->mnt_dir, mntdevice); + } + } + + endmntent(fp); + + if (mntdevice == NULL) { + pam_syslog(pamh, LOG_ERR, "Filesystem or device not found: %s", param.fs ? param.fs : pwd->pw_dir); + return PAM_PERM_DENIED; + } + + /* Get limits */ + if (quotactl(QCMD(Q_GETQUOTA, USRQUOTA), mntdevice, pwd->pw_uid, + (void *)&ndqblk) == -1) { + pam_syslog(pamh, LOG_ERR, "fail to get limits for user %s : %m", + pwd->pw_name); + free(mntdevice); + return PAM_PERM_DENIED; + } + + if (param.debug >= 1) + debug(pamh, &ndqblk, mntdevice, "Quota read:"); + + /* Only overwrite if quotas aren't already set or if overwrite is set */ + if ((ndqblk.dqb_bsoftlimit == 0 && ndqblk.dqb_bhardlimit == 0 && + ndqblk.dqb_isoftlimit == 0 && ndqblk.dqb_ihardlimit == 0) || + param.overwrite == 1) { + + /* Parse new limits + * Exit with an error should only the hard- or softlimit be + * configured but not both. + * This avoids errors, inconsistencies and possible race conditions + * during setquota. + */ + ndqblk.dqb_valid = 0; + if (!parse_dqblk(pamh, argc, argv, &ndqblk)) { + pam_syslog(pamh, LOG_ERR, + "Both soft- and hardlimits for %s need to be configured " + "at the same time!", mntdevice); + free(mntdevice); + return PAM_PERM_DENIED; + } + + /* Nothing changed? Are no limits defined at all in configuration? */ + if (ndqblk.dqb_valid == 0) { + pam_syslog(pamh, LOG_AUTH | LOG_WARNING, "no limits defined in " + "configuration for user %s on %s", pwd->pw_name, mntdevice); + free(mntdevice); + return PAM_IGNORE; + } + + /* Set limits */ + if (quotactl(QCMD(Q_SETQUOTA, USRQUOTA), mntdevice, pwd->pw_uid, + (void *)&ndqblk) == -1) { + pam_syslog(pamh, LOG_ERR, "failed to set limits for user %s on %s: %m", + pwd->pw_name, mntdevice); + free(mntdevice); + return PAM_PERM_DENIED; + } + if (param.debug >= 1) + debug(pamh, &ndqblk, mntdevice, "Quota set:"); + + /* End module */ + free(mntdevice); + return PAM_SUCCESS; + + } else { + /* Quota exists and overwrite!=1 */ + if (param.debug >= 1) { + pam_syslog(pamh, LOG_DEBUG, "Quota already exists for user %s " + "on %s, not overwriting it without \"overwrite=1\"", + pwd->pw_name, mntdevice); + } + /* End module */ + free(mntdevice); + return PAM_IGNORE; + } + +} + +int +pam_sm_close_session(pam_handle_t *pamh UNUSED, int flags UNUSED, + int argc UNUSED, const char **argv UNUSED) +{ + return PAM_SUCCESS; +} diff --git a/modules/pam_setquota/tst-pam_setquota b/modules/pam_setquota/tst-pam_setquota new file mode 100755 index 0000000..f50c958 --- /dev/null +++ b/modules/pam_setquota/tst-pam_setquota @@ -0,0 +1,2 @@ +#!/bin/sh +../../tests/tst-dlopen .libs/pam_setquota.so |