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
174
175
176
|
/*
* nfsd
*
* This is the user level part of nfsd. This is very primitive, because
* all the work is now done in the kernel module.
*
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <syslog.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "nfslib.h"
static void usage(const char *);
static struct option longopts[] =
{
{ "host", 1, 0, 'H' },
{ "help", 0, 0, 'h' },
{ "no-nfs-version", 1, 0, 'N' },
{ "no-tcp", 0, 0, 'T' },
{ "no-udp", 0, 0, 'U' },
{ "port", 1, 0, 'P' },
{ "port", 1, 0, 'p' },
{ NULL, 0, 0, 0 }
};
unsigned int protobits = NFSCTL_ALLBITS;
unsigned int versbits = NFSCTL_ALLBITS;
char *haddr = NULL;
int
main(int argc, char **argv)
{
int count = 1, c, error, port, fd, found_one;
struct servent *ent;
struct hostent *hp;
ent = getservbyname ("nfs", "udp");
if (ent != NULL)
port = ntohs (ent->s_port);
else
port = 2049;
while ((c = getopt_long(argc, argv, "H:hN:p:P:TU", longopts, NULL)) != EOF) {
switch(c) {
case 'H':
if (inet_addr(optarg) != INADDR_NONE) {
haddr = strdup(optarg);
} else if ((hp = gethostbyname(optarg)) != NULL) {
haddr = inet_ntoa((*(struct in_addr*)(hp->h_addr_list[0])));
} else {
fprintf(stderr, "%s: Unknown hostname: %s\n",
argv[0], optarg);
usage(argv [0]);
}
break;
case 'P': /* XXX for nfs-server compatibility */
case 'p':
port = atoi(optarg);
if (port <= 0 || port > 65535) {
fprintf(stderr, "%s: bad port number: %s\n",
argv[0], optarg);
usage(argv [0]);
}
break;
case 'N':
switch((c = atoi(optarg))) {
case 2:
case 3:
case 4:
NFSCTL_VERUNSET(versbits, c);
break;
default:
fprintf(stderr, "%c: Unsupported version\n", c);
exit(1);
}
break;
case 'T':
NFSCTL_TCPUNSET(protobits);
break;
case 'U':
NFSCTL_UDPUNSET(protobits);
break;
default:
fprintf(stderr, "Invalid argument: '%c'\n", c);
case 'h':
usage(argv[0]);
}
}
/*
* Do some sanity checking, if the ctlbits are set
*/
if (!NFSCTL_UDPISSET(protobits) && !NFSCTL_TCPISSET(protobits)) {
fprintf(stderr, "invalid protocol specified\n");
exit(1);
}
found_one = 0;
for (c = NFSD_MINVERS; c <= NFSD_MAXVERS; c++) {
if (NFSCTL_VERISSET(versbits, c))
found_one = 1;
}
if (!found_one) {
fprintf(stderr, "no version specified\n");
exit(1);
}
if (NFSCTL_VERISSET(versbits, 4) && !NFSCTL_TCPISSET(versbits)) {
fprintf(stderr, "version 4 requires the TCP protocol\n");
exit(1);
}
if (haddr == NULL) {
struct in_addr in = {INADDR_ANY};
haddr = strdup(inet_ntoa(in));
}
if (chdir(NFS_STATEDIR)) {
fprintf(stderr, "%s: chdir(%s) failed: %s\n",
argv [0], NFS_STATEDIR, strerror(errno));
exit(1);
}
if (optind < argc) {
if ((count = atoi(argv[optind])) < 0) {
/* insane # of servers */
fprintf(stderr,
"%s: invalid server count (%d), using 1\n",
argv[0], count);
count = 1;
}
}
/* KLUDGE ALERT:
Some kernels let nfsd kernel threads inherit open files
from the program that spawns them (i.e. us). So close
everything before spawning kernel threads. --Chip */
fd = open("/dev/null", O_RDWR);
if (fd == -1)
perror("/dev/null");
else {
(void) dup2(fd, 0);
(void) dup2(fd, 1);
(void) dup2(fd, 2);
}
closeall(3);
openlog("nfsd", LOG_PID, LOG_DAEMON);
if ((error = nfssvc(port, count, versbits, protobits, haddr)) < 0) {
int e = errno;
syslog(LOG_ERR, "nfssvc: %s", strerror(e));
closelog();
}
return (error != 0);
}
static void
usage(const char *prog)
{
fprintf(stderr, "Usage:\n"
"%s [-H hostname] [-p|-P|--port port] [-N|--no-nfs-version version ] [-T|--no-tcp] [-U|--no-udp] nrservs\n",
prog);
exit(2);
}
|
