1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
Index: Linux-PAM/doc/modules/pam_limits.sgml
===================================================================
RCS file: /afs/sipb/project/debian/cvs/pam/Linux-PAM/doc/modules/pam_limits.sgml,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 pam_limits.sgml
--- Linux-PAM/doc/modules/pam_limits.sgml 29 Apr 2001 04:16:56 -0000 1.1.1.1
+++ Linux-PAM/doc/modules/pam_limits.sgml 5 May 2002 18:35:58 -0000
@@ -142,6 +142,7 @@
<item><tt/as/ - address space limit
<item><tt/maxlogins/ - max number of logins for this user.
<item><tt/priority/ - the priority to run user process with
+<item><tt/chroot/ - directory to chroot user to
</itemize>
<p>
@@ -184,6 +185,7 @@
@faculty soft nproc 20
@faculty hard nproc 50
ftp hard nproc 0
+ftp - chroot /ftp
@student - maxlogins 4
</verb>
</tscreen>
Index: Linux-PAM/modules/pam_limits/pam_limits.c
===================================================================
RCS file: /afs/sipb/project/debian/cvs/pam/Linux-PAM/modules/pam_limits/pam_limits.c,v
retrieving revision 1.1.1.1
diff -u -r1.1.1.1 pam_limits.c
--- Linux-PAM/modules/pam_limits/pam_limits.c 29 Apr 2001 04:17:23 -0000 1.1.1.1
+++ Linux-PAM/modules/pam_limits/pam_limits.c 5 May 2002 18:50:32 -0000
@@ -61,12 +61,14 @@
int priority; /* the priority to run user process with */
struct user_limits_struct limits[RLIM_NLIMITS];
char conf_file[BUFSIZ];
+ char chroot_dir[8092] ; /* directory to chroot into */
};
#define LIMIT_LOGIN RLIM_NLIMITS+1
#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
@@ -273,6 +275,8 @@
pl->login_limit = -2;
pl->login_limit_def = LIMITS_DEF_NONE;
+ pl->chroot_dir[0] = '\0';
+
return retval;
}
@@ -318,6 +322,8 @@
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_log(LOG_DEBUG,"unknown limit item '%s'", lim_item);
return;
@@ -365,7 +371,7 @@
}
if (limit_item != LIMIT_LOGIN && limit_item != LIMIT_NUMSYSLOGINS
- && limit_item != LIMIT_PRI
+ && limit_item != LIMIT_PRI && limit_item != LIMIT_CHROOT
) {
if (limit_type & LIMIT_SOFT) {
if (pl->limits[limit_item].src_soft < source) {
@@ -387,15 +393,18 @@
if (limit_item == LIMIT_PRI) {
/* additional check */
pl->priority = ((limit_value>0)?limit_value:0);
- } else {
+ } else if (limit_item == LIMIT_LOGIN ||
+ limit_item == LIMIT_NUMSYSLOGINS) {
if (pl->login_limit_def < source) {
return;
} else {
pl->login_limit = limit_value;
pl->login_limit_def = source;
}
+ } else if (limit_item == LIMIT_CHROOT) {
+ strncpy(pl->chroot_dir, value_orig, sizeof(pl->chroot_dir));
}
- return;
+ return;
}
static int parse_config_file(const char *uname, int ctrl,
@@ -517,6 +526,14 @@
retval |= LOGIN_ERR;
} else if (pl->login_limit == 0)
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;
}
|
