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 276
- compare with another revision
- download diff
- download tarball
- view history from revision 276
- Committer: Teddy Hogeborn
- Date: 2009-01-18 00:18:50 UTC
- Revision ID: teddy@fukt.bsnet.se-20090118001850-pvg8xjwmbyt23fom
* debian/rules (install-indep): Removed "--no-start" from
dh_installinit.
dh_installinit.
- files modified:
- INSTALL
added
removed
plugins.d/password-prompt.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Password-prompt - Read a password from the terminal and print it
4
4
*
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
23
24
*/
24
25
25
26
#define _GNU_SOURCE /* getline() */
32
33
#include <signal.h> /* sig_atomic_t, raise(), struct
33
34
sigaction, sigemptyset(),
34
35
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
raise() */
36
SIGQUIT, SIGHUP, SIGTERM */
37
37
#include <stddef.h> /* NULL, size_t, ssize_t */
38
38
#include <sys/types.h> /* ssize_t */
39
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
40
getopt_long, getenv() */
41
41
#include <stdio.h> /* fprintf(), stderr, getline(),
42
42
stdin, feof(), perror(), fputc(),
43
getopt_long */
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
43
stdout, getopt_long */
44
#include <errno.h> /* errno, EINVAL */
47
45
#include <iso646.h> /* or, not */
48
46
#include <stdbool.h> /* bool, false, true */
49
47
#include <string.h> /* strlen, rindex, strncmp, strcmp */
52
50
argp_parse(), error_t,
53
51
ARGP_KEY_ARG, ARGP_KEY_END,
54
52
ARGP_ERR_UNKNOWN */
55
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
56
EX_UNAVAILABLE, EX_IOERR, EX_OK */
57
53
58
volatile sig_atomic_t quit_now = 0;
59
int signal_received;
54
volatile bool quit_now = false;
60
55
bool debug = false;
61
56
const char *argp_program_version = "password-prompt " VERSION;
62
57
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
63
58
64
static void termination_handler(int signum){
65
if(quit_now){
66
return;
67
}
68
quit_now = 1;
69
signal_received = signum;
59
static void termination_handler(__attribute__((unused))int signum){
60
quit_now = true;
70
61
}
71
62
72
63
int main(int argc, char **argv){
89
80
{ .name = NULL }
90
81
};
91
82
92
error_t parse_opt (int key, char *arg, struct argp_state *state){
93
switch (key){
83
error_t parse_opt (int key, char *arg, struct argp_state *state) {
84
switch (key) {
94
85
case 'p':
95
86
prefix = arg;
96
87
break;
115
106
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
116
107
if(ret == ARGP_ERR_UNKNOWN){
117
108
fprintf(stderr, "Unknown error while parsing arguments\n");
118
return EX_SOFTWARE;
109
return EXIT_FAILURE;
119
110
}
120
111
}
121
112
127
118
}
128
119
129
120
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
130
int e = errno;
131
121
perror("tcgetattr");
132
switch(e){
133
case EBADF:
134
case ENOTTY:
135
return EX_UNAVAILABLE;
136
default:
137
return EX_OSERR;
138
}
122
return EXIT_FAILURE;
139
123
}
140
124
141
125
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
*/
126
sigaddset(&new_action.sa_mask, SIGINT);
127
sigaddset(&new_action.sa_mask, SIGHUP);
128
sigaddset(&new_action.sa_mask, SIGTERM);
161
129
ret = sigaction(SIGINT, NULL, &old_action);
162
130
if(ret == -1){
163
131
perror("sigaction");
164
return EX_OSERR;
132
return EXIT_FAILURE;
165
133
}
166
134
if(old_action.sa_handler != SIG_IGN){
167
135
ret = sigaction(SIGINT, &new_action, NULL);
168
136
if(ret == -1){
169
137
perror("sigaction");
170
return EX_OSERR;
138
return EXIT_FAILURE;
171
139
}
172
140
}
173
141
ret = sigaction(SIGHUP, NULL, &old_action);
174
142
if(ret == -1){
175
143
perror("sigaction");
176
return EX_OSERR;
144
return EXIT_FAILURE;
177
145
}
178
146
if(old_action.sa_handler != SIG_IGN){
179
147
ret = sigaction(SIGHUP, &new_action, NULL);
180
148
if(ret == -1){
181
149
perror("sigaction");
182
return EX_OSERR;
150
return EXIT_FAILURE;
183
151
}
184
152
}
185
153
ret = sigaction(SIGTERM, NULL, &old_action);
186
154
if(ret == -1){
187
155
perror("sigaction");
188
return EX_OSERR;
156
return EXIT_FAILURE;
189
157
}
190
158
if(old_action.sa_handler != SIG_IGN){
191
159
ret = sigaction(SIGTERM, &new_action, NULL);
192
160
if(ret == -1){
193
161
perror("sigaction");
194
return EX_OSERR;
162
return EXIT_FAILURE;
195
163
}
196
164
}
197
165
201
169
}
202
170
203
171
t_new = t_old;
204
t_new.c_lflag &= ~(tcflag_t)ECHO;
172
t_new.c_lflag &= ~ECHO;
205
173
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
206
int e = errno;
207
174
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
}
175
return EXIT_FAILURE;
216
176
}
217
177
218
178
if(debug){
219
179
fprintf(stderr, "Waiting for input from stdin \n");
220
180
}
256
216
/* Make n = data size instead of allocated buffer size */
257
217
n = (size_t)ret;
258
218
/* Strip final newline */
259
if(n > 0 and buffer[n-1] == '\n'){
219
if(n>0 and buffer[n-1] == '\n'){
260
220
buffer[n-1] = '\0'; /* not strictly necessary */
261
221
n--;
262
222
}
264
224
while(written < n){
265
225
ret = write(STDOUT_FILENO, buffer + written, n - written);
266
226
if(ret < 0){
267
int e = errno;
268
227
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
}
228
status = EXIT_FAILURE;
283
229
break;
284
230
}
285
231
written += (size_t)ret;
286
232
}
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
233
break;
302
234
}
303
235
if(ret < 0){
304
int e = errno;
305
236
if(errno != EINTR and not feof(stdin)){
306
237
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
}
238
status = EXIT_FAILURE;
316
239
break;
317
240
}
318
241
}
320
243
read from stdin */
321
244
fputc('\n', stderr);
322
245
if(debug and not quit_now){
323
/* If quit_now is nonzero, we were interrupted by a signal, and
246
/* If quit_now is true, we were interrupted by a signal, and
324
247
will print that later, so no need to show this too. */
325
248
fprintf(stderr, "getline() returned 0, retrying.\n");
326
249
}
335
258
perror("tcsetattr+echo");
336
259
}
337
260
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
261
if(debug){
349
262
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
350
263
status);
351
264
}
352
if(status == EXIT_SUCCESS or status == EX_OK){
265
if(status == EXIT_SUCCESS){
353
266
fputc('\n', stderr);
354
267
}
355
268
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0