To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/password-prompt.c
- browse files at revision 174
- compare with another revision
- download diff
- download tarball
- view history from revision 174
- Committer: Teddy Hogeborn
- Date: 2008-09-06 17:24:58 UTC
- Revision ID: teddy@fukt.bsnet.se-20080906172458-2x5wlfkn7oqckt1y
* legalnotice.xml: Copy DocBook 4.4-formatted text from
<http://www.gnu.org/licenses/gpl-3.0.dbk>.
<http://www.gnu.org/licenses/gpl-3.0.dbk>.
- files added:
- etc-plugins.d-README
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files modified:
- .bzrignore
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
* Password-prompt - Read a password from the terminal and print it
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
3
* Passprompt - Read a password from the terminal and print it
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
21
20
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
21
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
22
* <https://www.fukt.bsnet.se/~teddy/>.
23
23
*/
24
24
25
25
#define _GNU_SOURCE /* getline() */
32
32
#include <signal.h> /* sig_atomic_t, raise(), struct
33
33
sigaction, sigemptyset(),
34
34
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
35
SIGQUIT, SIGHUP, SIGTERM */
37
36
#include <stddef.h> /* NULL, size_t, ssize_t */
38
37
#include <sys/types.h> /* ssize_t */
39
38
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
39
getopt_long, getenv() */
41
40
#include <stdio.h> /* fprintf(), stderr, getline(),
42
41
stdin, feof(), perror(), fputc(),
43
getopt_long */
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
42
stdout, getopt_long */
43
#include <errno.h> /* errno, EINVAL */
47
44
#include <iso646.h> /* or, not */
48
45
#include <stdbool.h> /* bool, false, true */
49
46
#include <string.h> /* strlen, rindex, strncmp, strcmp */
52
49
argp_parse(), error_t,
53
50
ARGP_KEY_ARG, ARGP_KEY_END,
54
51
ARGP_ERR_UNKNOWN */
55
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
56
EX_UNAVAILABLE, EX_IOERR, EX_OK */
57
52
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
53
volatile bool quit_now = false;
60
54
bool debug = false;
61
const char *argp_program_version = "password-prompt " VERSION;
55
const char *argp_program_version = "password-prompt 1.0";
62
56
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
57
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
68
quit_now = 1;
69
signal_received = signum;
58
static void termination_handler(__attribute__((unused))int signum){
59
quit_now = true;
70
60
}
71
61
72
62
int main(int argc, char **argv){
88
78
.doc = "Debug mode", .group = 3 },
89
79
{ .name = NULL }
90
80
};
91
92
error_t parse_opt (int key, char *arg, struct argp_state *state){
93
switch (key){
81
82
error_t parse_opt (int key, char *arg, struct argp_state *state) {
83
/* Get the INPUT argument from `argp_parse', which we know is a
84
pointer to our plugin list pointer. */
85
switch (key) {
94
86
case 'p':
95
87
prefix = arg;
96
88
break;
98
90
debug = true;
99
91
break;
100
92
case ARGP_KEY_ARG:
101
argp_usage(state);
93
argp_usage (state);
102
94
break;
103
95
case ARGP_KEY_END:
104
96
break;
107
99
}
108
100
return 0;
109
101
}
110
102
111
103
struct argp argp = { .options = options, .parser = parse_opt,
112
104
.args_doc = "",
113
105
.doc = "Mandos password-prompt -- Read and"
114
106
" output a password" };
115
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
116
if(ret == ARGP_ERR_UNKNOWN){
107
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
108
if (ret == ARGP_ERR_UNKNOWN){
117
109
fprintf(stderr, "Unknown error while parsing arguments\n");
118
return EX_SOFTWARE;
110
return EXIT_FAILURE;
119
111
}
120
112
}
121
122
if(debug){
113
114
if (debug){
123
115
fprintf(stderr, "Starting %s\n", argv[0]);
124
116
}
125
if(debug){
117
if (debug){
126
118
fprintf(stderr, "Storing current terminal attributes\n");
127
119
}
128
120
129
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
130
int e = errno;
121
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
131
122
perror("tcgetattr");
132
switch(e){
133
case EBADF:
134
case ENOTTY:
135
return EX_UNAVAILABLE;
136
default:
137
return EX_OSERR;
138
}
123
return EXIT_FAILURE;
139
124
}
140
125
141
126
sigemptyset(&new_action.sa_mask);
142
ret = sigaddset(&new_action.sa_mask, SIGINT);
143
if(ret == -1){
144
perror("sigaddset");
145
return EX_OSERR;
146
}
147
ret = sigaddset(&new_action.sa_mask, SIGHUP);
148
if(ret == -1){
149
perror("sigaddset");
150
return EX_OSERR;
151
}
152
ret = sigaddset(&new_action.sa_mask, SIGTERM);
153
if(ret == -1){
154
perror("sigaddset");
155
return EX_OSERR;
156
}
157
/* Need to check if the handler is SIG_IGN before handling:
158
| [[info:libc:Initial Signal Actions]] |
159
| [[info:libc:Basic Signal Handling]] |
160
*/
127
sigaddset(&new_action.sa_mask, SIGINT);
128
sigaddset(&new_action.sa_mask, SIGHUP);
129
sigaddset(&new_action.sa_mask, SIGTERM);
161
130
ret = sigaction(SIGINT, NULL, &old_action);
162
131
if(ret == -1){
163
132
perror("sigaction");
164
return EX_OSERR;
133
return EXIT_FAILURE;
165
134
}
166
if(old_action.sa_handler != SIG_IGN){
135
if (old_action.sa_handler != SIG_IGN){
167
136
ret = sigaction(SIGINT, &new_action, NULL);
168
137
if(ret == -1){
169
138
perror("sigaction");
170
return EX_OSERR;
139
return EXIT_FAILURE;
171
140
}
172
141
}
173
142
ret = sigaction(SIGHUP, NULL, &old_action);
174
143
if(ret == -1){
175
144
perror("sigaction");
176
return EX_OSERR;
145
return EXIT_FAILURE;
177
146
}
178
if(old_action.sa_handler != SIG_IGN){
147
if (old_action.sa_handler != SIG_IGN){
179
148
ret = sigaction(SIGHUP, &new_action, NULL);
180
149
if(ret == -1){
181
150
perror("sigaction");
182
return EX_OSERR;
151
return EXIT_FAILURE;
183
152
}
184
153
}
185
154
ret = sigaction(SIGTERM, NULL, &old_action);
186
155
if(ret == -1){
187
156
perror("sigaction");
188
return EX_OSERR;
157
return EXIT_FAILURE;
189
158
}
190
if(old_action.sa_handler != SIG_IGN){
159
if (old_action.sa_handler != SIG_IGN){
191
160
ret = sigaction(SIGTERM, &new_action, NULL);
192
161
if(ret == -1){
193
162
perror("sigaction");
194
return EX_OSERR;
163
return EXIT_FAILURE;
195
164
}
196
165
}
197
166
198
167
199
if(debug){
168
if (debug){
200
169
fprintf(stderr, "Removing echo flag from terminal attributes\n");
201
170
}
202
171
203
172
t_new = t_old;
204
t_new.c_lflag &= ~(tcflag_t)ECHO;
205
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
206
int e = errno;
173
t_new.c_lflag &= ~ECHO;
174
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
207
175
perror("tcsetattr-echo");
208
switch(e){
209
case EBADF:
210
case ENOTTY:
211
return EX_UNAVAILABLE;
212
case EINVAL:
213
default:
214
return EX_OSERR;
215
}
176
return EXIT_FAILURE;
216
177
}
217
218
if(debug){
178
179
if (debug){
219
180
fprintf(stderr, "Waiting for input from stdin \n");
220
181
}
221
182
while(true){
222
if(quit_now){
183
if (quit_now){
223
184
if(debug){
224
185
fprintf(stderr, "Interrupted by signal, exiting.\n");
225
186
}
251
212
}
252
213
}
253
214
ret = getline(&buffer, &n, stdin);
254
if(ret > 0){
215
if (ret > 0){
255
216
status = EXIT_SUCCESS;
256
217
/* Make n = data size instead of allocated buffer size */
257
218
n = (size_t)ret;
258
219
/* Strip final newline */
259
if(n > 0 and buffer[n-1] == '\n'){
220
if(n>0 and buffer[n-1] == '\n'){
260
221
buffer[n-1] = '\0'; /* not strictly necessary */
261
222
n--;
262
223
}
264
225
while(written < n){
265
226
ret = write(STDOUT_FILENO, buffer + written, n - written);
266
227
if(ret < 0){
267
int e = errno;
268
228
perror("write");
269
switch(e){
270
case EBADF:
271
case EFAULT:
272
case EINVAL:
273
case EFBIG:
274
case EIO:
275
case ENOSPC:
276
default:
277
status = EX_IOERR;
278
break;
279
case EINTR:
280
status = EXIT_FAILURE;
281
break;
282
}
229
status = EXIT_FAILURE;
283
230
break;
284
231
}
285
232
written += (size_t)ret;
286
233
}
287
ret = close(STDOUT_FILENO);
288
if(ret == -1){
289
int e = errno;
290
perror("close");
291
switch(e){
292
case EBADF:
293
status = EX_OSFILE;
294
break;
295
case EIO:
296
default:
297
status = EX_IOERR;
298
break;
299
}
300
}
301
234
break;
302
235
}
303
if(ret < 0){
304
int e = errno;
305
if(errno != EINTR and not feof(stdin)){
236
if (ret < 0){
237
if (errno != EINTR and not feof(stdin)){
306
238
perror("getline");
307
switch(e){
308
case EBADF:
309
status = EX_UNAVAILABLE;
310
case EIO:
311
case EINVAL:
312
default:
313
status = EX_IOERR;
314
break;
315
}
239
status = EXIT_FAILURE;
316
240
break;
317
241
}
318
242
}
320
244
read from stdin */
321
245
fputc('\n', stderr);
322
246
if(debug and not quit_now){
323
/* If quit_now is nonzero, we were interrupted by a signal, and
247
/* If quit_now is true, we were interrupted by a signal, and
324
248
will print that later, so no need to show this too. */
325
249
fprintf(stderr, "getline() returned 0, retrying.\n");
326
250
}
327
251
}
328
252
329
free(buffer);
330
331
if(debug){
253
if (debug){
332
254
fprintf(stderr, "Restoring terminal attributes\n");
333
255
}
334
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
256
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
335
257
perror("tcsetattr+echo");
336
258
}
337
259
338
if(quit_now){
339
sigemptyset(&old_action.sa_mask);
340
old_action.sa_handler = SIG_DFL;
341
ret = sigaction(signal_received, &old_action, NULL);
342
if(ret == -1){
343
perror("sigaction");
344
}
345
raise(signal_received);
346
}
347
348
if(debug){
260
if (debug){
349
261
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
350
262
status);
351
263
}
352
if(status == EXIT_SUCCESS or status == EX_OK){
264
if(status == EXIT_SUCCESS){
353
265
fputc('\n', stderr);
354
266
}
355
267
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0