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|
Index: Linux-PAM/modules/pam_limits/pam_limits.c
===================================================================
--- Linux-PAM/modules/pam_limits/pam_limits.c.orig
+++ Linux-PAM/modules/pam_limits/pam_limits.c
@@ -74,6 +74,7 @@
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 */
+ char chroot_dir[8092]; /* directory to chroot into */
struct user_limits_struct limits[RLIM_NLIMITS];
char conf_file[BUFSIZ];
int utmp_after_pam_call;
@@ -84,6 +85,7 @@
#define LIMIT_NUMSYSLOGINS RLIM_NLIMITS+2
#define LIMIT_PRI RLIM_NLIMITS+3
+#define LIMIT_CHROOT RLIM_NLIMITS+4
#define LIMIT_SOFT 1
#define LIMIT_HARD 2
@@ -238,6 +240,8 @@
pl->login_limit = -2;
pl->login_limit_def = LIMITS_DEF_NONE;
+ pl->chroot_dir[0] = '\0';
+
return retval;
}
@@ -306,6 +310,8 @@
pl->flag_numsyslogins = 1;
} else if (strcmp(lim_item, "priority") == 0) {
limit_item = LIMIT_PRI;
+ } else if (strcmp(lim_item, "chroot") == 0) {
+ limit_item = LIMIT_CHROOT;
} else {
pam_syslog(pamh, LOG_DEBUG, "unknown limit item '%s'", lim_item);
return;
@@ -343,9 +349,9 @@
pam_syslog(pamh, LOG_DEBUG,
"wrong limit value '%s' for limit type '%s'",
lim_value, lim_type);
- return;
+ return;
}
- } else {
+ } else if (limit_item != LIMIT_CHROOT) {
#ifdef __USE_FILE_OFFSET64
rlimit_value = strtoull (lim_value, &endptr, 10);
#else
@@ -392,7 +398,9 @@
break;
}
- if ( (limit_item != LIMIT_LOGIN)
+ if (limit_item == LIMIT_CHROOT)
+ strncpy(pl->chroot_dir, value_orig, sizeof(pl->chroot_dir));
+ else if ( (limit_item != LIMIT_LOGIN)
&& (limit_item != LIMIT_NUMSYSLOGINS)
&& (limit_item != LIMIT_PRI) ) {
if (limit_type & LIMIT_SOFT) {
@@ -590,6 +598,13 @@
retval |= LOGIN_ERR;
}
+ if (!retval && pl->chroot_dir[0]) {
+ i = chdir(pl->chroot_dir);
+ if (i == 0)
+ i = chroot(pl->chroot_dir);
+ if (i != 0)
+ retval = LIMIT_ERR;
+ }
return retval;
}
Index: Linux-PAM/modules/pam_limits/limits.conf.5.xml
===================================================================
--- Linux-PAM/modules/pam_limits/limits.conf.5.xml.orig
+++ Linux-PAM/modules/pam_limits/limits.conf.5.xml
@@ -223,6 +223,12 @@
(Linux 2.6.12 and higher)</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>chroot</option></term>
+ <listitem>
+ <para>the directory to chroot the user to</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</listitem>
</varlistentry>
Index: Linux-PAM/modules/pam_limits/limits.conf.5
===================================================================
--- Linux-PAM/modules/pam_limits/limits.conf.5.orig
+++ Linux-PAM/modules/pam_limits/limits.conf.5
@@ -1,11 +1,11 @@
.\" 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
+.\" Generator: DocBook XSL Stylesheets v1.72.0 <http://docbook.sf.net/>
+.\" Date: 08/19/2007
+.\" Manual: Linux-PAM Manual
+.\" Source: Linux-PAM Manual
.\"
-.TH "LIMITS.CONF" "5" "06/22/2006" "Linux\-PAM Manual" "Linux\-PAM Manual"
+.TH "LIMITS.CONF" "5" "08/19/2007" "Linux\-PAM Manual" "Linux\-PAM Manual"
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
@@ -23,38 +23,45 @@
\fI<value>\fR
.PP
The fields listed above should be filled as follows:
-.TP 3n
+.PP
\fB<domain>\fR
-.RS 3n
-.TP 3n
-\(bu
-a username
-.TP 3n
-\(bu
-a groupname, with
+.RS 4
+.sp
+.RS 4
+\h'-04'\(bu\h'+03'a username
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+03'a groupname, with
\fB@group\fR
syntax. This should not be confused with netgroups.
-.TP 3n
-\(bu
-the wildcard
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+03'the wildcard
\fB*\fR, for default entry.
-.TP 3n
-\(bu
-the wildcard
+.RE
+.sp
+.RS 4
+\h'-04'\(bu\h'+03'the wildcard
\fB%\fR, for maxlogins limit only, can also be used with
\fI%group\fR
syntax.
.RE
-.TP 3n
+.RE
+.PP
\fB<type>\fR
-.RS 3n
-.TP 3n
+.RS 4
+.PP
\fBhard\fR
+.RS 4
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
+.RE
+.PP
\fBsoft\fR
+.RS 4
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
@@ -62,8 +69,10 @@
limits. The values specified with this token can be thought of as
\fIdefault\fR
values, for normal system usage.
-.TP 3n
+.RE
+.PP
\fB\-\fR
+.RS 4
for enforcing both
\fBsoft\fR
and
@@ -72,65 +81,107 @@
.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
+.RE
+.PP
\fB<item>\fR
-.RS 3n
-.TP 3n
+.RS 4
+.PP
\fBcore\fR
+.RS 4
limits the core file size (KB)
-.TP 3n
+.RE
+.PP
\fBdata\fR
+.RS 4
maximum data size (KB)
-.TP 3n
+.RE
+.PP
\fBfsize\fR
+.RS 4
maximum filesize (KB)
-.TP 3n
+.RE
+.PP
\fBmemlock\fR
+.RS 4
maximum locked\-in\-memory address space (KB)
-.TP 3n
+.RE
+.PP
\fBnofile\fR
+.RS 4
maximum number of open files
-.TP 3n
+.RE
+.PP
\fBrss\fR
+.RS 4
maximum resident set size (KB)
-.TP 3n
+.RE
+.PP
\fBstack\fR
+.RS 4
maximum stack size (KB)
-.TP 3n
+.RE
+.PP
\fBcpu\fR
+.RS 4
maximum CPU time (minutes)
-.TP 3n
+.RE
+.PP
\fBnproc\fR
+.RS 4
maximum number of processes
-.TP 3n
+.RE
+.PP
\fBas\fR
+.RS 4
address space limit
-.TP 3n
+.RE
+.PP
\fBmaxlogins\fR
+.RS 4
maximum number of logins for this user
-.TP 3n
+.RE
+.PP
\fBmaxsyslogins\fR
+.RS 4
maximum number of logins on system
-.TP 3n
+.RE
+.PP
\fBpriority\fR
+.RS 4
the priority to run user process with (negative values boost process priority)
-.TP 3n
+.RE
+.PP
\fBlocks\fR
+.RS 4
maximum locked files (Linux 2.4 and higher)
-.TP 3n
+.RE
+.PP
\fBsigpending\fR
+.RS 4
maximum number of pending signals (Linux 2.6 and higher)
-.TP 3n
+.RE
+.PP
\fBmsqqueue\fR
+.RS 4
maximum memory used by POSIX message queues (bytes) (Linux 2.6 and higher)
-.TP 3n
+.RE
+.PP
\fBnice\fR
+.RS 4
maximum nice priority allowed to raise to (Linux 2.6.12 and higher)
-.TP 3n
+.RE
+.PP
\fBrtprio\fR
+.RS 4
maximum realtime priority allowed for non\-privileged processes (Linux 2.6.12 and higher)
.RE
.PP
+\fBchroot\fR
+.RS 4
+the directory to chroot the user to
+.RE
+.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.
@@ -149,7 +200,7 @@
These are some example lines which might be specified in
\fI/etc/security/limits.conf\fR.
.sp
-.RS 3n
+.RS 4
.nf
* soft core 0
* hard rss 10000
Index: Linux-PAM/modules/pam_limits/limits.conf
===================================================================
--- Linux-PAM/modules/pam_limits/limits.conf.orig
+++ Linux-PAM/modules/pam_limits/limits.conf
@@ -35,6 +35,7 @@
# - msgqueue - max memory used by POSIX message queues (bytes)
# - nice - max nice priority allowed to raise to
# - rtprio - max realtime priority
+# - chroot - change root to directory (Debian-specific)
#
#<domain> <type> <item> <value>
#
@@ -45,6 +46,7 @@
#@faculty soft nproc 20
#@faculty hard nproc 50
#ftp hard nproc 0
+#ftp - chroot /ftp
#@student - maxlogins 4
# End of file
|
