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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* utils/mountd/rmtab.c
*
* Manage the rmtab file for mountd.
*
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
#include "config.h"
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "xmalloc.h"
#include "misc.h"
#include "exportfs.h"
#include "xio.h"
#include "mountd.h"
void
mountlist_add(nfs_export *exp, const char *path)
{
struct rmtabent xe;
struct rmtabent *rep;
int lockid;
if ((lockid = xflock(_PATH_RMTAB, "a")) < 0)
return;
setrmtabent("r");
while ((rep = getrmtabent(1)) != NULL) {
if (strcmp (rep->r_client,
exp->m_client->m_hostname) == 0
&& strcmp(rep->r_path, path) == 0) {
endrmtabent();
xfunlock(lockid);
return;
}
}
endrmtabent();
strncpy(xe.r_client, exp->m_client->m_hostname,
sizeof (xe.r_client) - 1);
xe.r_client [sizeof (xe.r_client) - 1] = '\0';
strncpy(xe.r_path, path, sizeof (xe.r_path) - 1);
xe.r_path [sizeof (xe.r_path) - 1] = '\0';
if (setrmtabent("a")) {
putrmtabent(&xe);
endrmtabent();
}
xfunlock(lockid);
}
void
mountlist_del(nfs_export *exp, const char *path)
{
struct rmtabent *rep;
FILE *fp;
char *hname = exp->m_client->m_hostname;
int lockid;
if ((lockid = xflock(_PATH_RMTAB, "w")) < 0)
return;
if (!setrmtabent("r")) {
xfunlock(lockid);
return;
}
if (!(fp = fsetrmtabent(_PATH_RMTABTMP, "w"))) {
endrmtabent();
xfunlock(lockid);
return;
}
while ((rep = getrmtabent(1)) != NULL) {
if (strcmp (rep->r_client, hname)
|| strcmp(rep->r_path, path))
fputrmtabent(fp, rep);
}
if (rename(_PATH_RMTABTMP, _PATH_RMTAB) < 0) {
xlog(L_ERROR, "couldn't rename %s to %s",
_PATH_RMTABTMP, _PATH_RMTAB);
}
endrmtabent(); /* close & unlink */
fendrmtabent(fp);
xfunlock(lockid);
}
void
mountlist_del_all(struct sockaddr_in *sin)
{
struct in_addr addr = sin->sin_addr;
struct hostent *hp;
struct rmtabent *rep;
nfs_export *exp;
FILE *fp;
int lockid;
if ((lockid = xflock(_PATH_RMTAB, "w")) < 0)
return;
if (!(hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET))) {
xlog(L_ERROR, "can't get hostname of %s", inet_ntoa(addr));
xfunlock(lockid);
return;
}
else
hp = hostent_dup (hp);
if (!setrmtabent("r")) {
xfunlock(lockid);
free (hp);
return;
}
if (!(fp = fsetrmtabent(_PATH_RMTABTMP, "w"))) {
endrmtabent();
xfunlock(lockid);
free (hp);
return;
}
while ((rep = getrmtabent(1)) != NULL) {
if (strcmp(rep->r_client, hp->h_name) == 0 &&
(exp = auth_authenticate("umountall", sin, rep->r_path))) {
export_reset(exp);
continue;
}
fputrmtabent(fp, rep);
}
if (rename(_PATH_RMTABTMP, _PATH_RMTAB) < 0) {
xlog(L_ERROR, "couldn't rename %s to %s",
_PATH_RMTABTMP, _PATH_RMTAB);
}
endrmtabent(); /* close & unlink */
fendrmtabent(fp);
xfunlock(lockid);
free (hp);
}
mountlist
mountlist_list(void)
{
static mountlist mlist = NULL;
static time_t last_mtime = 0;
mountlist m;
struct rmtabent *rep;
struct stat stb;
int lockid;
if ((lockid = xflock(_PATH_RMTAB, "r")) < 0)
return NULL;
if (stat(_PATH_RMTAB, &stb) < 0) {
xlog(L_ERROR, "can't stat %s", _PATH_RMTAB);
return NULL;
}
if (stb.st_mtime != last_mtime) {
while (mlist) {
mlist = (m = mlist)->ml_next;
xfree(m->ml_hostname);
xfree(m->ml_directory);
xfree(m);
}
last_mtime = stb.st_mtime;
setrmtabent("r");
while ((rep = getrmtabent(1)) != NULL) {
m = (mountlist) xmalloc(sizeof(*m));
m->ml_hostname = xstrdup(rep->r_client);
m->ml_directory = xstrdup(rep->r_path);
m->ml_next = mlist;
mlist = m;
}
endrmtabent();
}
xfunlock(lockid);
return mlist;
}
|
