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-rw-r--r--modules/pam_mkhomedir/Makefile.am39
-rw-r--r--modules/pam_mkhomedir/Makefile.in1189
-rw-r--r--modules/pam_mkhomedir/README36
-rw-r--r--modules/pam_mkhomedir/README.xml36
-rw-r--r--modules/pam_mkhomedir/mkhomedir_helper.860
-rw-r--r--modules/pam_mkhomedir/mkhomedir_helper.8.xml78
-rw-r--r--modules/pam_mkhomedir/mkhomedir_helper.c406
-rw-r--r--modules/pam_mkhomedir/pam_mkhomedir.8129
-rw-r--r--modules/pam_mkhomedir/pam_mkhomedir.8.xml203
-rw-r--r--modules/pam_mkhomedir/pam_mkhomedir.c234
-rwxr-xr-xmodules/pam_mkhomedir/tst-pam_mkhomedir2
11 files changed, 2412 insertions, 0 deletions
diff --git a/modules/pam_mkhomedir/Makefile.am b/modules/pam_mkhomedir/Makefile.am
new file mode 100644
index 0000000..eb04721
--- /dev/null
+++ b/modules/pam_mkhomedir/Makefile.am
@@ -0,0 +1,39 @@
+#
+# Copyright (c) 2005, 2006, 2009 Thorsten Kukuk <kukuk@suse.de>
+# Copyright (c) 2008 Red Hat, Inc.
+#
+
+CLEANFILES = *~
+MAINTAINERCLEANFILES = $(MANS) README
+
+EXTRA_DIST = README $(MANS) $(XMLS) tst-pam_mkhomedir
+
+man_MANS = pam_mkhomedir.8 mkhomedir_helper.8
+
+XMLS = README.xml pam_mkhomedir.8.xml mkhomedir_helper.8.xml
+
+TESTS = tst-pam_mkhomedir
+
+securelibdir = $(SECUREDIR)
+secureconfdir = $(SCONFIGDIR)
+
+AM_CFLAGS = -I$(top_srcdir)/libpam/include -I$(top_srcdir)/libpamc/include \
+ -DMKHOMEDIR_HELPER=\"$(sbindir)/mkhomedir_helper\"
+
+securelib_LTLIBRARIES = pam_mkhomedir.la
+pam_mkhomedir_la_SOURCES = pam_mkhomedir.c
+pam_mkhomedir_la_LIBADD = $(top_builddir)/libpam/libpam.la
+pam_mkhomedir_la_LDFLAGS = -no-undefined -avoid-version -module
+if HAVE_VERSIONING
+ pam_mkhomedir_la_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
+endif
+
+sbin_PROGRAMS = mkhomedir_helper
+mkhomedir_helper_SOURCES = mkhomedir_helper.c
+mkhomedir_helper_LDADD = $(top_builddir)/libpam/libpam.la
+
+if ENABLE_REGENERATE_MAN
+noinst_DATA = README
+README: pam_mkhomedir.8.xml
+-include $(top_srcdir)/Make.xml.rules
+endif
diff --git a/modules/pam_mkhomedir/Makefile.in b/modules/pam_mkhomedir/Makefile.in
new file mode 100644
index 0000000..17c646c
--- /dev/null
+++ b/modules/pam_mkhomedir/Makefile.in
@@ -0,0 +1,1189 @@
+# Makefile.in generated by automake 1.13.4 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2013 Free Software Foundation, Inc.
+
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+# 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, 2009 Thorsten Kukuk <kukuk@suse.de>
+# Copyright (c) 2008 Red Hat, Inc.
+#
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diff --git a/modules/pam_mkhomedir/README b/modules/pam_mkhomedir/README
new file mode 100644
index 0000000..cfc7bc4
--- /dev/null
+++ b/modules/pam_mkhomedir/README
@@ -0,0 +1,36 @@
+pam_mkhomedir — PAM module to create users home directory
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+DESCRIPTION
+
+The pam_mkhomedir PAM module will create a users home directory if it does not
+exist when the session begins. This allows users to be present in central
+database (such as NIS, kerberos or LDAP) without using a distributed file
+system or pre-creating a large number of directories. The skeleton directory
+(usually /etc/skel/) is used to copy default files and also sets a umask for
+the creation.
+
+The new users home directory will not be removed after logout of the user.
+
+EXAMPLES
+
+A sample /etc/pam.d/login file:
+
+ auth requisite pam_securetty.so
+ auth sufficient pam_ldap.so
+ auth required pam_unix.so
+ auth required pam_nologin.so
+ account sufficient pam_ldap.so
+ account required pam_unix.so
+ password required pam_unix.so
+ session required pam_mkhomedir.so skel=/etc/skel/ umask=0022
+ session required pam_unix.so
+ session optional pam_lastlog.so
+ session optional pam_mail.so standard
+
+
+AUTHOR
+
+pam_mkhomedir was written by Jason Gunthorpe <jgg@debian.org>.
+
diff --git a/modules/pam_mkhomedir/README.xml b/modules/pam_mkhomedir/README.xml
new file mode 100644
index 0000000..978cbe7
--- /dev/null
+++ b/modules/pam_mkhomedir/README.xml
@@ -0,0 +1,36 @@
+<?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_mkhomedir.8.xml">
+-->
+]>
+
+<article>
+
+ <articleinfo>
+
+ <title>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_mkhomedir.8.xml" xpointer='xpointer(//refnamediv[@id = "pam_mkhomedir-name"]/*)'/>
+ </title>
+
+ </articleinfo>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_mkhomedir.8.xml" xpointer='xpointer(//refsect1[@id = "pam_mkhomedir-description"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_mkhomedir.8.xml" xpointer='xpointer(//refsect1[@id = "pam_mkhomedir-examples"]/*)'/>
+ </section>
+
+ <section>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
+ href="pam_mkhomedir.8.xml" xpointer='xpointer(//refsect1[@id = "pam_mkhomedir-author"]/*)'/>
+ </section>
+
+</article>
diff --git a/modules/pam_mkhomedir/mkhomedir_helper.8 b/modules/pam_mkhomedir/mkhomedir_helper.8
new file mode 100644
index 0000000..de85f2f
--- /dev/null
+++ b/modules/pam_mkhomedir/mkhomedir_helper.8
@@ -0,0 +1,60 @@
+'\" t
+.\" Title: mkhomedir_helper
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\" Date: 05/18/2017
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "MKHOMEDIR_HELPER" "8" "05/18/2017" "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"
+mkhomedir_helper \- Helper binary that creates home directories
+.SH "SYNOPSIS"
+.HP \w'\fBmkhomedir_helper\fR\ 'u
+\fBmkhomedir_helper\fR {\fIuser\fR} [\fIumask\fR\ [\ \fIpath\-to\-skel\fR\ ]]
+.SH "DESCRIPTION"
+.PP
+\fImkhomedir_helper\fR
+is a helper program for the
+\fIpam_mkhomedir\fR
+module that creates home directories and populates them with contents of the specified skel directory\&.
+.PP
+The default value of
+\fIumask\fR
+is 0022 and the default value of
+\fIpath\-to\-skel\fR
+is
+\fI/etc/skel\fR\&.
+.PP
+The helper is separated from the module to not require direct access from login SELinux domains to the contents of user home directories\&. The SELinux domain transition happens when the module is executing the
+\fImkhomedir_helper\fR\&.
+.PP
+The helper never touches home directories if they already exist\&.
+.SH "SEE ALSO"
+.PP
+\fBpam_mkhomedir\fR(8)
+.SH "AUTHOR"
+.PP
+Written by Tomas Mraz based on the code originally in
+\fIpam_mkhomedir\fR
+module\&.
diff --git a/modules/pam_mkhomedir/mkhomedir_helper.8.xml b/modules/pam_mkhomedir/mkhomedir_helper.8.xml
new file mode 100644
index 0000000..c834edd
--- /dev/null
+++ b/modules/pam_mkhomedir/mkhomedir_helper.8.xml
@@ -0,0 +1,78 @@
+<?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="mkhomedir_helper">
+
+ <refmeta>
+ <refentrytitle>mkhomedir_helper</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class="sectdesc">Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id="mkhomedir_helper-name">
+ <refname>mkhomedir_helper</refname>
+ <refpurpose>Helper binary that creates home directories</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="mkhomedir_helper-cmdsynopsis">
+ <command>mkhomedir_helper</command>
+ <arg choice="req">
+ <replaceable>user</replaceable>
+ </arg>
+ <arg choice="opt">
+ <replaceable>umask</replaceable>
+ <arg choice="opt">
+ <replaceable>path-to-skel</replaceable>
+ </arg>
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1 id="mkhomedir_helper-description">
+
+ <title>DESCRIPTION</title>
+
+ <para>
+ <emphasis>mkhomedir_helper</emphasis> is a helper program for the
+ <emphasis>pam_mkhomedir</emphasis> module that creates home directories
+ and populates them with contents of the specified skel directory.
+ </para>
+
+ <para>
+ The default value of <replaceable>umask</replaceable> is 0022 and the
+ default value of <replaceable>path-to-skel</replaceable> is
+ <emphasis>/etc/skel</emphasis>.
+ </para>
+
+ <para>
+ The helper is separated from the module to not require direct access from
+ login SELinux domains to the contents of user home directories. The
+ SELinux domain transition happens when the module is executing the
+ <emphasis>mkhomedir_helper</emphasis>.
+ </para>
+
+ <para>
+ The helper never touches home directories if they already exist.
+ </para>
+ </refsect1>
+
+ <refsect1 id='mkhomedir_helper-see_also'>
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>pam_mkhomedir</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>
+ </para>
+ </refsect1>
+
+ <refsect1 id='mkhomedir_helper-author'>
+ <title>AUTHOR</title>
+ <para>
+ Written by Tomas Mraz based on the code originally in
+ <emphasis>pam_mkhomedir</emphasis> module.
+ </para>
+ </refsect1>
+
+</refentry>
diff --git a/modules/pam_mkhomedir/mkhomedir_helper.c b/modules/pam_mkhomedir/mkhomedir_helper.c
new file mode 100644
index 0000000..9e204c1
--- /dev/null
+++ b/modules/pam_mkhomedir/mkhomedir_helper.c
@@ -0,0 +1,406 @@
+/* mkhomedir_helper - helper for pam_mkhomedir module
+
+ Released under the GNU LGPL version 2 or later
+
+ Copyright (c) Red Hat, Inc., 2009
+ Originally written by Jason Gunthorpe <jgg@debian.org> Feb 1999
+ Structure taken from pam_lastlogin by Andrew Morgan
+ <morgan@parc.power.net> 1996
+ */
+
+#include "config.h"
+
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <dirent.h>
+#include <syslog.h>
+
+#include <security/pam_ext.h>
+#include <security/pam_modutil.h>
+
+static unsigned long u_mask = 0022;
+static char skeldir[BUFSIZ] = "/etc/skel";
+
+/* Do the actual work of creating a home dir */
+static int
+create_homedir(const struct passwd *pwd,
+ const char *source, const char *dest)
+{
+ char remark[BUFSIZ];
+ DIR *d;
+ struct dirent *dent;
+ int retval = PAM_SESSION_ERR;
+
+ /* Create the new directory */
+ if (mkdir(dest, 0700) && errno != EEXIST)
+ {
+ pam_syslog(NULL, LOG_ERR, "unable to create directory %s: %m", dest);
+ return PAM_PERM_DENIED;
+ }
+
+ /* See if we need to copy the skel dir over. */
+ if ((source == NULL) || (strlen(source) == 0))
+ {
+ retval = PAM_SUCCESS;
+ goto go_out;
+ }
+
+ /* Scan the directory */
+ d = opendir(source);
+ if (d == NULL)
+ {
+ pam_syslog(NULL, LOG_DEBUG, "unable to read directory %s: %m", source);
+ retval = PAM_PERM_DENIED;
+ goto go_out;
+ }
+
+ for (dent = readdir(d); dent != NULL; dent = readdir(d))
+ {
+ int srcfd;
+ int destfd;
+ int res;
+ struct stat st;
+#ifndef PATH_MAX
+ char *newsource = NULL, *newdest = NULL;
+ /* track length of buffers */
+ int nslen = 0, ndlen = 0;
+ int slen = strlen(source), dlen = strlen(dest);
+#else
+ char newsource[PATH_MAX], newdest[PATH_MAX];
+#endif
+
+ /* Skip some files.. */
+ if (strcmp(dent->d_name,".") == 0 ||
+ strcmp(dent->d_name,"..") == 0)
+ continue;
+
+ /* Determine what kind of file it is. */
+#ifndef PATH_MAX
+ nslen = slen + strlen(dent->d_name) + 2;
+
+ if (nslen <= 0)
+ {
+ retval = PAM_BUF_ERR;
+ goto go_out;
+ }
+
+ if ((newsource = malloc(nslen)) == NULL)
+ {
+ retval = PAM_BUF_ERR;
+ goto go_out;
+ }
+
+ sprintf(newsource, "%s/%s", source, dent->d_name);
+#else
+ snprintf(newsource, sizeof(newsource), "%s/%s", source, dent->d_name);
+#endif
+
+ if (lstat(newsource, &st) != 0)
+#ifndef PATH_MAX
+ {
+ free(newsource);
+ newsource = NULL;
+ continue;
+ }
+#else
+ continue;
+#endif
+
+
+ /* We'll need the new file's name. */
+#ifndef PATH_MAX
+ ndlen = dlen + strlen(dent->d_name)+2;
+
+ if (ndlen <= 0)
+ {
+ retval = PAM_BUF_ERR;
+ goto go_out;
+ }
+
+ if ((newdest = malloc(ndlen)) == NULL)
+ {
+ free (newsource);
+ retval = PAM_BUF_ERR;
+ goto go_out;
+ }
+
+ sprintf (newdest, "%s/%s", dest, dent->d_name);
+#else
+ snprintf (newdest, sizeof (newdest), "%s/%s", dest, dent->d_name);
+#endif
+
+ /* If it's a directory, recurse. */
+ if (S_ISDIR(st.st_mode))
+ {
+ retval = create_homedir(pwd, newsource, newdest);
+
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+
+ if (retval != PAM_SUCCESS)
+ {
+ closedir(d);
+ goto go_out;
+ }
+ continue;
+ }
+
+ /* If it's a symlink, create a new link. */
+ if (S_ISLNK(st.st_mode))
+ {
+ int pointedlen = 0;
+#ifndef PATH_MAX
+ char *pointed = NULL;
+ {
+ int size = 100;
+
+ while (1) {
+ pointed = malloc(size);
+ if (pointed == NULL) {
+ free(newsource);
+ free(newdest);
+ return PAM_BUF_ERR;
+ }
+ pointedlen = readlink(newsource, pointed, size);
+ if (pointedlen < 0) break;
+ if (pointedlen < size) break;
+ free(pointed);
+ size *= 2;
+ }
+ }
+ if (pointedlen < 0)
+ free(pointed);
+ else
+ pointed[pointedlen] = 0;
+#else
+ char pointed[PATH_MAX];
+ memset(pointed, 0, sizeof(pointed));
+
+ pointedlen = readlink(newsource, pointed, sizeof(pointed) - 1);
+#endif
+
+ if (pointedlen >= 0) {
+ if(symlink(pointed, newdest) == 0)
+ {
+ if (lchown(newdest, pwd->pw_uid, pwd->pw_gid) != 0)
+ {
+ pam_syslog(NULL, LOG_DEBUG,
+ "unable to change perms on link %s: %m", newdest);
+ closedir(d);
+#ifndef PATH_MAX
+ free(pointed);
+ free(newsource);
+ free(newdest);
+#endif
+ return PAM_PERM_DENIED;
+ }
+ }
+#ifndef PATH_MAX
+ free(pointed);
+#endif
+ }
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+ continue;
+ }
+
+ /* If it's not a regular file, it's probably not a good idea to create
+ * the new device node, FIFO, or whatever it is. */
+ if (!S_ISREG(st.st_mode))
+ {
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+ continue;
+ }
+
+ /* Open the source file */
+ if ((srcfd = open(newsource, O_RDONLY)) < 0 || fstat(srcfd, &st) != 0)
+ {
+ pam_syslog(NULL, LOG_DEBUG,
+ "unable to open or stat src file %s: %m", newsource);
+ closedir(d);
+
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+
+ return PAM_PERM_DENIED;
+ }
+
+ /* Open the dest file */
+ if ((destfd = open(newdest, O_WRONLY | O_TRUNC | O_CREAT, 0600)) < 0)
+ {
+ pam_syslog(NULL, LOG_DEBUG,
+ "unable to open dest file %s: %m", newdest);
+ close(srcfd);
+ closedir(d);
+
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+ return PAM_PERM_DENIED;
+ }
+
+ /* Set the proper ownership and permissions for the module. We make
+ the file a+w and then mask it with the set mask. This preseves
+ execute bits */
+ if (fchmod(destfd, (st.st_mode | 0222) & (~u_mask)) != 0 ||
+ fchown(destfd, pwd->pw_uid, pwd->pw_gid) != 0)
+ {
+ pam_syslog(NULL, LOG_DEBUG,
+ "unable to change perms on copy %s: %m", newdest);
+ close(srcfd);
+ close(destfd);
+ closedir(d);
+
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+
+ return PAM_PERM_DENIED;
+ }
+
+ /* Copy the file */
+ do
+ {
+ res = pam_modutil_read(srcfd, remark, sizeof(remark));
+
+ if (res == 0)
+ continue;
+
+ if (res > 0) {
+ if (pam_modutil_write(destfd, remark, res) == res)
+ continue;
+ }
+
+ /* If we get here, pam_modutil_read returned a -1 or
+ pam_modutil_write returned something unexpected. */
+ pam_syslog(NULL, LOG_DEBUG, "unable to perform IO: %m");
+ close(srcfd);
+ close(destfd);
+ closedir(d);
+
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+
+ return PAM_PERM_DENIED;
+ }
+ while (res != 0);
+ close(srcfd);
+ close(destfd);
+
+#ifndef PATH_MAX
+ free(newsource); newsource = NULL;
+ free(newdest); newdest = NULL;
+#endif
+
+ }
+ closedir(d);
+
+ retval = PAM_SUCCESS;
+
+ go_out:
+
+ if (chmod(dest, 0777 & (~u_mask)) != 0 ||
+ chown(dest, pwd->pw_uid, pwd->pw_gid) != 0)
+ {
+ pam_syslog(NULL, LOG_DEBUG,
+ "unable to change perms on directory %s: %m", dest);
+ return PAM_PERM_DENIED;
+ }
+
+ return retval;
+}
+
+static int
+make_parent_dirs(char *dir, int make)
+{
+ int rc = PAM_SUCCESS;
+ char *cp = strrchr(dir, '/');
+ struct stat st;
+
+ if (!cp)
+ return rc;
+
+ if (cp != dir) {
+ *cp = '\0';
+ if (stat(dir, &st) && errno == ENOENT)
+ rc = make_parent_dirs(dir, 1);
+ *cp = '/';
+
+ if (rc != PAM_SUCCESS)
+ return rc;
+ }
+
+ if (make && mkdir(dir, 0755) && errno != EEXIST) {
+ pam_syslog(NULL, LOG_ERR, "unable to create directory %s: %m", dir);
+ return PAM_PERM_DENIED;
+ }
+
+ return rc;
+}
+
+int
+main(int argc, char *argv[])
+{
+ struct passwd *pwd;
+ struct stat st;
+
+ if (argc < 2) {
+ fprintf(stderr, "Usage: %s <username> [<umask> [<skeldir>]]\n", argv[0]);
+ return PAM_SESSION_ERR;
+ }
+
+ pwd = getpwnam(argv[1]);
+ if (pwd == NULL) {
+ pam_syslog(NULL, LOG_ERR, "User unknown.");
+ return PAM_CRED_INSUFFICIENT;
+ }
+
+ if (argc >= 3) {
+ char *eptr;
+ errno = 0;
+ u_mask = strtoul(argv[2], &eptr, 0);
+ if (errno != 0 || *eptr != '\0') {
+ pam_syslog(NULL, LOG_ERR, "Bogus umask value %s", argv[2]);
+ return PAM_SESSION_ERR;
+ }
+ }
+
+ if (argc >= 4) {
+ if (strlen(argv[3]) >= sizeof(skeldir)) {
+ pam_syslog(NULL, LOG_ERR, "Too long skeldir path.");
+ return PAM_SESSION_ERR;
+ }
+ strcpy(skeldir, argv[3]);
+ }
+
+ /* Stat the home directory, if something exists then we assume it is
+ correct and return a success */
+ if (stat(pwd->pw_dir, &st) == 0)
+ return PAM_SUCCESS;
+
+ if (make_parent_dirs(pwd->pw_dir, 0) != PAM_SUCCESS)
+ return PAM_PERM_DENIED;
+
+ return create_homedir(pwd, skeldir, pwd->pw_dir);
+}
diff --git a/modules/pam_mkhomedir/pam_mkhomedir.8 b/modules/pam_mkhomedir/pam_mkhomedir.8
new file mode 100644
index 0000000..3efcad5
--- /dev/null
+++ b/modules/pam_mkhomedir/pam_mkhomedir.8
@@ -0,0 +1,129 @@
+'\" t
+.\" Title: pam_mkhomedir
+.\" Author: [see the "AUTHOR" section]
+.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
+.\" Date: 05/18/2017
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
+.\" Language: English
+.\"
+.TH "PAM_MKHOMEDIR" "8" "05/18/2017" "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_mkhomedir \- PAM module to create users home directory
+.SH "SYNOPSIS"
+.HP \w'\fBpam_mkhomedir\&.so\fR\ 'u
+\fBpam_mkhomedir\&.so\fR [silent] [umask=\fImode\fR] [skel=\fIskeldir\fR]
+.SH "DESCRIPTION"
+.PP
+The pam_mkhomedir PAM module will create a users home directory if it does not exist when the session begins\&. This allows users to be present in central database (such as NIS, kerberos or LDAP) without using a distributed file system or pre\-creating a large number of directories\&. The skeleton directory (usually
+/etc/skel/) is used to copy default files and also sets a umask for the creation\&.
+.PP
+The new users home directory will not be removed after logout of the user\&.
+.SH "OPTIONS"
+.PP
+\fBsilent\fR
+.RS 4
+Don\*(Aqt print informative messages\&.
+.RE
+.PP
+\fBumask=\fR\fB\fImask\fR\fR
+.RS 4
+The user file\-creation mask is set to
+\fImask\fR\&. The default value of mask is 0022\&.
+.RE
+.PP
+\fBskel=\fR\fB\fI/path/to/skel/directory\fR\fR
+.RS 4
+Indicate an alternative
+skel
+directory to override the default
+/etc/skel\&.
+.RE
+.SH "MODULE TYPES PROVIDED"
+.PP
+Only the
+\fBsession\fR
+module type is provided\&.
+.SH "RETURN VALUES"
+.PP
+PAM_BUF_ERR
+.RS 4
+Memory buffer error\&.
+.RE
+.PP
+PAM_CRED_INSUFFICIENT
+.RS 4
+Insufficient credentials to access authentication data\&.
+.RE
+.PP
+PAM_PERM_DENIED
+.RS 4
+Not enough permissions to create the new directory or read the skel directory\&.
+.RE
+.PP
+PAM_USER_UNKNOWN
+.RS 4
+User not known to the underlying authentication module\&.
+.RE
+.PP
+PAM_SUCCESS
+.RS 4
+Environment variables were set\&.
+.RE
+.SH "FILES"
+.PP
+/etc/skel
+.RS 4
+Default skel directory
+.RE
+.SH "EXAMPLES"
+.PP
+A sample /etc/pam\&.d/login file:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+ auth requisite pam_securetty\&.so
+ auth sufficient pam_ldap\&.so
+ auth required pam_unix\&.so
+ auth required pam_nologin\&.so
+ account sufficient pam_ldap\&.so
+ account required pam_unix\&.so
+ password required pam_unix\&.so
+ session required pam_mkhomedir\&.so skel=/etc/skel/ umask=0022
+ session required pam_unix\&.so
+ session optional pam_lastlog\&.so
+ session optional pam_mail\&.so standard
+
+.fi
+.if n \{\
+.RE
+.\}
+.sp
+.SH "SEE ALSO"
+.PP
+\fBpam.d\fR(5),
+\fBpam\fR(8)\&.
+.SH "AUTHOR"
+.PP
+pam_mkhomedir was written by Jason Gunthorpe <jgg@debian\&.org>\&.
diff --git a/modules/pam_mkhomedir/pam_mkhomedir.8.xml b/modules/pam_mkhomedir/pam_mkhomedir.8.xml
new file mode 100644
index 0000000..c980ce1
--- /dev/null
+++ b/modules/pam_mkhomedir/pam_mkhomedir.8.xml
@@ -0,0 +1,203 @@
+<?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_mkhomedir'>
+
+ <refmeta>
+ <refentrytitle>pam_mkhomedir</refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo>
+ </refmeta>
+
+ <refnamediv id='pam_mkhomedir-name'>
+ <refname>pam_mkhomedir</refname>
+ <refpurpose>
+ PAM module to create users home directory
+ </refpurpose>
+ </refnamediv>
+
+<!-- body begins here -->
+
+ <refsynopsisdiv>
+ <cmdsynopsis id="pam_mkhomedir-cmdsynopsis">
+ <command>pam_mkhomedir.so</command>
+ <arg choice="opt">
+ silent
+ </arg>
+ <arg choice="opt">
+ umask=<replaceable>mode</replaceable>
+ </arg>
+ <arg choice="opt">
+ skel=<replaceable>skeldir</replaceable>
+ </arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+
+ <refsect1 id="pam_mkhomedir-description">
+ <title>DESCRIPTION</title>
+ <para>
+ The pam_mkhomedir PAM module will create a users home directory
+ if it does not exist when the session begins. This allows users
+ to be present in central database (such as NIS, kerberos or LDAP)
+ without using a distributed file system or pre-creating a large
+ number of directories. The skeleton directory (usually
+ <filename>/etc/skel/</filename>) is used to copy default files
+ and also sets a umask for the creation.
+ </para>
+ <para>
+ The new users home directory will not be removed after logout
+ of the user.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_mkhomedir-options">
+ <title>OPTIONS</title>
+ <variablelist>
+
+ <varlistentry>
+ <term>
+ <option>silent</option>
+ </term>
+ <listitem>
+ <para>
+ Don't print informative messages.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>umask=<replaceable>mask</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ The user file-creation mask is set to
+ <replaceable>mask</replaceable>. The default value of mask is
+ 0022.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <option>skel=<replaceable>/path/to/skel/directory</replaceable></option>
+ </term>
+ <listitem>
+ <para>
+ Indicate an alternative <filename>skel</filename> directory
+ to override the default <filename>/etc/skel</filename>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_mkhomedir-types">
+ <title>MODULE TYPES PROVIDED</title>
+ <para>
+ Only the <option>session</option> module type is provided.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_mkhomedir-return_values">
+ <title>RETURN VALUES</title>
+ <variablelist>
+ <varlistentry>
+ <term>PAM_BUF_ERR</term>
+ <listitem>
+ <para>
+ Memory buffer error.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_CRED_INSUFFICIENT</term>
+ <listitem>
+ <para>
+ Insufficient credentials to access authentication data.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_PERM_DENIED</term>
+ <listitem>
+ <para>
+ Not enough permissions to create the new directory
+ or read the skel directory.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_USER_UNKNOWN</term>
+ <listitem>
+ <para>
+ User not known to the underlying authentication module.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>PAM_SUCCESS</term>
+ <listitem>
+ <para>
+ Environment variables were set.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="pam_mkhomedir-files">
+ <title>FILES</title>
+ <variablelist>
+ <varlistentry>
+ <term><filename>/etc/skel</filename></term>
+ <listitem>
+ <para>Default skel directory</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id='pam_mkhomedir-examples'>
+ <title>EXAMPLES</title>
+ <para>
+ A sample /etc/pam.d/login file:
+ <programlisting>
+ auth requisite pam_securetty.so
+ auth sufficient pam_ldap.so
+ auth required pam_unix.so
+ auth required pam_nologin.so
+ account sufficient pam_ldap.so
+ account required pam_unix.so
+ password required pam_unix.so
+ session required pam_mkhomedir.so skel=/etc/skel/ umask=0022
+ session required pam_unix.so
+ session optional pam_lastlog.so
+ session optional pam_mail.so standard
+ </programlisting>
+ </para>
+ </refsect1>
+
+
+ <refsect1 id="pam_mkhomedir-see_also">
+ <title>SEE ALSO</title>
+ <para>
+ <citerefentry>
+ <refentrytitle>pam.d</refentrytitle><manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
+ </citerefentry>.
+ </para>
+ </refsect1>
+
+ <refsect1 id="pam_mkhomedir-author">
+ <title>AUTHOR</title>
+ <para>
+ pam_mkhomedir was written by Jason Gunthorpe &lt;jgg@debian.org&gt;.
+ </para>
+ </refsect1>
+</refentry>
diff --git a/modules/pam_mkhomedir/pam_mkhomedir.c b/modules/pam_mkhomedir/pam_mkhomedir.c
new file mode 100644
index 0000000..84c922f
--- /dev/null
+++ b/modules/pam_mkhomedir/pam_mkhomedir.c
@@ -0,0 +1,234 @@
+/* PAM Make Home Dir module
+
+ This module will create a users home directory if it does not exist
+ when the session begins. This allows users to be present in central
+ database (such as nis, kerb or ldap) without using a distributed
+ file system or pre-creating a large number of directories.
+
+ Here is a sample /etc/pam.d/login file for Debian GNU/Linux
+ 2.1:
+
+ auth requisite pam_securetty.so
+ auth sufficient pam_ldap.so
+ auth required pam_unix.so
+ auth optional pam_group.so
+ auth optional pam_mail.so
+ account requisite pam_time.so
+ account sufficient pam_ldap.so
+ account required pam_unix.so
+ session required pam_mkhomedir.so skel=/etc/skel/ umask=0022
+ session required pam_unix.so
+ session optional pam_lastlog.so
+ password required pam_unix.so
+
+ Released under the GNU LGPL version 2 or later
+ Copyright (c) Red Hat, Inc. 2009
+ Originally written by Jason Gunthorpe <jgg@debian.org> Feb 1999
+ Structure taken from pam_lastlogin by Andrew Morgan
+ <morgan@parc.power.net> 1996
+ */
+
+#include "config.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <syslog.h>
+#include <signal.h>
+
+/*
+ * here, we make a definition for the externally accessible function
+ * in this file (this definition is required for static a module
+ * but strongly encouraged generally) it is used to instruct the
+ * modules include file to define the function prototypes.
+ */
+
+#define PAM_SM_SESSION
+
+#include <security/pam_modules.h>
+#include <security/_pam_macros.h>
+#include <security/pam_modutil.h>
+#include <security/pam_ext.h>
+
+/* argument parsing */
+#define MKHOMEDIR_DEBUG 020 /* be verbose about things */
+#define MKHOMEDIR_QUIET 040 /* keep quiet about things */
+
+struct options_t {
+ int ctrl;
+ const char *umask;
+ const char *skeldir;
+};
+typedef struct options_t options_t;
+
+static void
+_pam_parse (const pam_handle_t *pamh, int flags, int argc, const char **argv,
+ options_t *opt)
+{
+ opt->ctrl = 0;
+ opt->umask = "0022";
+ opt->skeldir = "/etc/skel";
+
+ /* does the appliction require quiet? */
+ if ((flags & PAM_SILENT) == PAM_SILENT)
+ opt->ctrl |= MKHOMEDIR_QUIET;
+
+ /* step through arguments */
+ for (; argc-- > 0; ++argv)
+ {
+ if (!strcmp(*argv, "silent")) {
+ opt->ctrl |= MKHOMEDIR_QUIET;
+ } else if (!strcmp(*argv, "debug")) {
+ opt->ctrl |= MKHOMEDIR_DEBUG;
+ } else if (!strncmp(*argv,"umask=",6)) {
+ opt->umask = *argv+6;
+ } else if (!strncmp(*argv,"skel=",5)) {
+ opt->skeldir = *argv+5;
+ } else {
+ pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+ }
+ }
+}
+
+/* Do the actual work of creating a home dir */
+static int
+create_homedir (pam_handle_t *pamh, options_t *opt,
+ const char *user, const char *dir)
+{
+ int retval, child;
+ struct sigaction newsa, oldsa;
+
+ /* Mention what is happening, if the notification fails that is OK */
+ if (!(opt->ctrl & MKHOMEDIR_QUIET))
+ pam_info(pamh, _("Creating directory '%s'."), dir);
+
+
+ D(("called."));
+
+ /*
+ * This code arranges that the demise of the child does not cause
+ * the application to receive a signal it is not expecting - which
+ * may kill the application or worse.
+ */
+ memset(&newsa, '\0', sizeof(newsa));
+ newsa.sa_handler = SIG_DFL;
+ sigaction(SIGCHLD, &newsa, &oldsa);
+
+ if (opt->ctrl & MKHOMEDIR_DEBUG) {
+ pam_syslog(pamh, LOG_DEBUG, "Executing mkhomedir_helper.");
+ }
+
+ /* fork */
+ child = fork();
+ if (child == 0) {
+ static char *envp[] = { NULL };
+ const char *args[] = { NULL, NULL, NULL, NULL, NULL };
+
+ if (pam_modutil_sanitize_helper_fds(pamh, PAM_MODUTIL_PIPE_FD,
+ PAM_MODUTIL_PIPE_FD,
+ PAM_MODUTIL_PIPE_FD) < 0)
+ _exit(PAM_SYSTEM_ERR);
+
+ /* exec the mkhomedir helper */
+ args[0] = MKHOMEDIR_HELPER;
+ args[1] = user;
+ args[2] = opt->umask;
+ args[3] = opt->skeldir;
+
+ execve(MKHOMEDIR_HELPER, (char *const *) args, envp);
+
+ /* should not get here: exit with error */
+ D(("helper binary is not available"));
+ _exit(PAM_SYSTEM_ERR);
+ } else if (child > 0) {
+ int rc;
+ while ((rc=waitpid(child, &retval, 0)) < 0 && errno == EINTR);
+ if (rc < 0) {
+ pam_syslog(pamh, LOG_ERR, "waitpid failed: %m");
+ retval = PAM_SYSTEM_ERR;
+ } else if (!WIFEXITED(retval)) {
+ pam_syslog(pamh, LOG_ERR, "mkhomedir_helper abnormal exit: %d", retval);
+ retval = PAM_SYSTEM_ERR;
+ } else {
+ retval = WEXITSTATUS(retval);
+ }
+ } else {
+ D(("fork failed"));
+ pam_syslog(pamh, LOG_ERR, "fork failed: %m");
+ retval = PAM_SYSTEM_ERR;
+ }
+
+ sigaction(SIGCHLD, &oldsa, NULL); /* restore old signal handler */
+
+ if (opt->ctrl & MKHOMEDIR_DEBUG) {
+ pam_syslog(pamh, LOG_DEBUG, "mkhomedir_helper returned %d", retval);
+ }
+
+ if (retval != PAM_SUCCESS && !(opt->ctrl & MKHOMEDIR_QUIET)) {
+ pam_error(pamh, _("Unable to create and initialize directory '%s'."),
+ dir);
+ }
+
+ D(("returning %d", retval));
+ return retval;
+}
+
+/* --- authentication management functions (only) --- */
+
+int
+pam_sm_open_session (pam_handle_t *pamh, int flags, int argc,
+ const char **argv)
+{
+ int retval;
+ options_t opt;
+ const void *user;
+ const struct passwd *pwd;
+ struct stat St;
+
+ /* Parse the flag values */
+ _pam_parse(pamh, flags, argc, argv, &opt);
+
+ /* 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, "Cannot obtain the user name.");
+ return PAM_USER_UNKNOWN;
+ }
+
+ /* Get the password entry */
+ pwd = pam_modutil_getpwnam (pamh, user);
+ if (pwd == NULL)
+ {
+ pam_syslog(pamh, LOG_NOTICE, "User unknown.");
+ D(("couldn't identify user %s", user));
+ return PAM_CRED_INSUFFICIENT;
+ }
+
+ /* Stat the home directory, if something exists then we assume it is
+ correct and return a success*/
+ if (stat(pwd->pw_dir, &St) == 0) {
+ if (opt.ctrl & MKHOMEDIR_DEBUG) {
+ pam_syslog(pamh, LOG_DEBUG, "Home directory %s already exists.",
+ pwd->pw_dir);
+ }
+ return PAM_SUCCESS;
+ }
+
+ return create_homedir(pamh, &opt, user, pwd->pw_dir);
+}
+
+/* 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_mkhomedir/tst-pam_mkhomedir b/modules/pam_mkhomedir/tst-pam_mkhomedir
new file mode 100755
index 0000000..5447883
--- /dev/null
+++ b/modules/pam_mkhomedir/tst-pam_mkhomedir
@@ -0,0 +1,2 @@
+#!/bin/sh
+../../tests/tst-dlopen .libs/pam_mkhomedir.so
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 19:17:18 +0000