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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* ==== finger.c ============================================================
* Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Chris Provenzano,
* the University of California, Berkeley and its contributors.
* 4. Neither the name of Chris Provenzano, the University nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO, THE REGENTS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* 1.00 93/08/26 proven
* -Pthread redesign of this file.
*
* 1.10 95/02/11 proven
* -Now that gethostbyname works ....
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
@(#) Copyright (c) 1993, 1995 Chris Provenzano.\n\
@(#) Copyright (c) 1995 Greg Stark.\n\
All rights reserved.\n";
#endif /* not lint */
#include <pthreadutil.h>
#include <sys/param.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
void *netfinger();
void usage(int eval)
{
fprintf(stderr,
"usage: finger [-lps] [-c <net_count>] [-t|T <timeout>] [-f <filename>] [login ...]\n");
exit(eval);
}
/*
* These globals are set initialy and then are only read.
* They do not need mutexes.
*/
int thread_time = 0, program_timeout = 0, lflag = 0;
pthread_tad_t parse_file_tad;
pthread_tad_t netfinger_tad;
void * timeout_thread(void * arg)
{
sleep(program_timeout);
exit(0);
}
void * signal_thread(void * arg)
{
int sig;
sigset_t program_signals;
sigemptyset(&program_signals);
sigaddset(&program_signals, SIGINT);
sigwait(&program_signals, &sig);
exit(0);
}
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
void * parse_file(void * arg)
{
char hostname[MAXHOSTNAMELEN];
char * filename = arg;
pthread_atexit_t atexit_id;
pthread_attr_t attr;
pthread_t thread_id;
char * thread_arg;
FILE * fp;
int len;
netsetupwait();
/* Parse the file and create a thread per connection */
if ((fp = fopen(filename, "r")) == NULL) {
fprintf(stderr, "Can't open file %s\n", filename);
pthread_exit(NULL);
}
pthread_atexit_add(&atexit_id, fclose_nrv, fp);
if (pthread_attr_init(&attr)) {
fprintf(stderr, "Error: Can't initialize thread attributes\n");
exit(2);
}
pthread_atexit_add(&atexit_id, pthread_attr_destroy_nrv, &attr);
while (fgets(hostname, MAXHOSTNAMELEN, fp)) {
if ((thread_arg = (char *)malloc(len = strlen(hostname))) == NULL) {
fprintf(stderr, "Error: out of memory\n");
exit(2);
}
hostname[len - 1] = '\0';
strcpy(thread_arg, hostname);
pthread_attr_setcleanup(&attr, free, thread_arg);
if (pthread_tad_create(&netfinger_tad, &thread_id, NULL,
netfinger, thread_arg)) {
fprintf(stderr, "Error: pthread_tad_create() netfinger_tad.\n");
exit(2);
}
}
pthread_exit(NULL);
}
main(int argc, char **argv)
{
pthread_atexit_t atexit_id;
pthread_t thread_id;
int max_count = 0;
char ch;
/* getopt variables */
extern char *optarg;
extern int optind;
/* Setup tad for parse_file() threads */
if (pthread_tad_init(&parse_file_tad, max_count)) {
fprintf(stderr,"Error: couldn't create parse_file() TAD.\n");
exit(1);
}
while ((ch = getopt(argc, argv, "c:f:t:T:ls")) != (char)EOF)
switch(ch) {
case 't': /* Time to let each thread run */
if ((thread_time = atoi(optarg)) <= 0) {
usage(1);
}
break;
case 'T': /* Time to let entire program run */
if ((program_timeout = atoi(optarg)) <= 0) {
usage(1);
}
break;
case 'f': /* Parse file for list of places to finger */
if (pthread_tad_create(&parse_file_tad, &thread_id, NULL,
parse_file, optarg)) {
fprintf(stderr,"Error: pthread_tad_create() parse_file_tad.\n");
exit(1);
}
break;
case 'c':
max_count = atoi(optarg);
break;
case 'l': /* long format */
lflag = 1;
break;
case 's': /* short format */
lflag = 0;
break;
case '?':
usage(0);
default:
usage(1);
}
/* The rest of the argumants are hosts */
argc -= optind;
argv += optind;
/* Setup timeout thread, if there is one */
if (program_timeout) {
if (pthread_create(&thread_id, NULL, timeout_thread, NULL)) {
fprintf(stderr,"Error: couldn't create program_timeout() thread\n");
exit(1);
}
}
/* Setup cleanup thread for signals */
if (pthread_create(&thread_id, NULL, signal_thread, NULL)) {
fprintf(stderr,"Error: couldn't create signal_timeout() thread\n");
exit(1);
}
/* Setup tad for netfinger() threads */
if (pthread_tad_init(&netfinger_tad, max_count)) {
fprintf(stderr,"Error: couldn't create netfinger() TAD.\n");
exit(1);
}
/* Setup the net and let everyone run */
netsetup();
while (*argv) {
if (pthread_tad_create(&netfinger_tad, &thread_id, NULL,
netfinger, *argv)) {
fprintf(stderr, "Error: pthread_tad_create() netfinger_tad.\n");
exit(2);
}
argv++;
}
pthread_tad_wait(&parse_file_tad, 0);
pthread_tad_wait(&netfinger_tad, 0);
exit(0);
}
|
