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- Committer: Teddy Hogeborn
- Date: 2009-01-10 06:23:04 UTC
- Revision ID: teddy@fukt.bsnet.se-20090110062304-wy7yw1pyuu5cldrg
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
investigating it.
* plugins.d/usplash.c (main): - '' - Also removed unnecessary code.
investigating it.
* plugins.d/usplash.c (main): - '' - Also removed unnecessary code.
- files removed:
- debian/watch
- files renamed:
- mandos-ctl => mandos-list
- 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>.
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* 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 */
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38
#include <sys/types.h> /* ssize_t */
39
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getenv() */
40
getopt_long, getenv() */
41
41
#include <stdio.h> /* fprintf(), stderr, getline(),
42
stdin, feof(), perror(), fputc()
43
*/
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
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EFAULT, EFBIG, EIO, ENOSPC, EINTR
46
*/
42
stdin, feof(), perror(), fputc(),
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){
86
77
.doc = "Prefix shown before the prompt", .group = 2 },
87
78
{ .name = "debug", .key = 128,
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79
.doc = "Debug mode", .group = 3 },
89
/*
90
* These reproduce what we would get without ARGP_NO_HELP
91
*/
92
{ .name = "help", .key = '?',
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.doc = "Give this help list", .group = -1 },
94
{ .name = "usage", .key = -3,
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.doc = "Give a short usage message", .group = -1 },
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{ .name = "version", .key = 'V',
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.doc = "Print program version", .group = -1 },
98
80
{ .name = NULL }
99
81
};
100
82
101
error_t parse_opt (int key, char *arg, struct argp_state *state){
102
errno = 0;
103
switch (key){
83
error_t parse_opt (int key, char *arg, struct argp_state *state) {
84
/* Get the INPUT argument from `argp_parse', which we know is a
85
pointer to our plugin list pointer. */
86
switch (key) {
104
87
case 'p':
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88
prefix = arg;
106
89
break;
107
90
case 128:
108
91
debug = true;
109
92
break;
110
/*
111
* These reproduce what we would get without ARGP_NO_HELP
112
*/
113
case '?': /* --help */
114
argp_state_help(state, state->out_stream,
115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
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case -3: /* --usage */
118
argp_state_help(state, state->out_stream,
119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
120
case 'V': /* --version */
121
fprintf(state->out_stream, "%s\n", argp_program_version);
122
exit(argp_err_exit_status);
93
case ARGP_KEY_ARG:
94
argp_usage (state);
95
break;
96
case ARGP_KEY_END:
123
97
break;
124
98
default:
125
99
return ARGP_ERR_UNKNOWN;
126
100
}
127
return errno;
101
return 0;
128
102
}
129
103
130
104
struct argp argp = { .options = options, .parser = parse_opt,
131
105
.args_doc = "",
132
106
.doc = "Mandos password-prompt -- Read and"
133
107
" output a password" };
134
ret = argp_parse(&argp, argc, argv,
135
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
136
switch(ret){
137
case 0:
138
break;
139
case ENOMEM:
140
default:
141
errno = ret;
142
perror("argp_parse");
143
return EX_OSERR;
144
case EINVAL:
145
return EX_USAGE;
108
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
109
if (ret == ARGP_ERR_UNKNOWN){
110
fprintf(stderr, "Unknown error while parsing arguments\n");
111
return EXIT_FAILURE;
146
112
}
147
113
}
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114
149
if(debug){
115
if (debug){
150
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fprintf(stderr, "Starting %s\n", argv[0]);
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117
}
152
if(debug){
118
if (debug){
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fprintf(stderr, "Storing current terminal attributes\n");
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120
}
155
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if(tcgetattr(STDIN_FILENO, &t_old) != 0){
157
int e = errno;
122
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
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123
perror("tcgetattr");
159
switch(e){
160
case EBADF:
161
case ENOTTY:
162
return EX_UNAVAILABLE;
163
default:
164
return EX_OSERR;
165
}
124
return EXIT_FAILURE;
166
125
}
167
126
168
127
sigemptyset(&new_action.sa_mask);
169
ret = sigaddset(&new_action.sa_mask, SIGINT);
170
if(ret == -1){
171
perror("sigaddset");
172
return EX_OSERR;
173
}
174
ret = sigaddset(&new_action.sa_mask, SIGHUP);
175
if(ret == -1){
176
perror("sigaddset");
177
return EX_OSERR;
178
}
179
ret = sigaddset(&new_action.sa_mask, SIGTERM);
180
if(ret == -1){
181
perror("sigaddset");
182
return EX_OSERR;
183
}
184
/* Need to check if the handler is SIG_IGN before handling:
185
| [[info:libc:Initial Signal Actions]] |
186
| [[info:libc:Basic Signal Handling]] |
187
*/
128
sigaddset(&new_action.sa_mask, SIGINT);
129
sigaddset(&new_action.sa_mask, SIGHUP);
130
sigaddset(&new_action.sa_mask, SIGTERM);
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ret = sigaction(SIGINT, NULL, &old_action);
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if(ret == -1){
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perror("sigaction");
191
return EX_OSERR;
134
return EXIT_FAILURE;
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135
}
193
if(old_action.sa_handler != SIG_IGN){
136
if (old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGINT, &new_action, NULL);
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if(ret == -1){
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139
perror("sigaction");
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return EX_OSERR;
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return EXIT_FAILURE;
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}
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}
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ret = sigaction(SIGHUP, NULL, &old_action);
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if(ret == -1){
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perror("sigaction");
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return EX_OSERR;
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return EXIT_FAILURE;
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}
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if(old_action.sa_handler != SIG_IGN){
148
if (old_action.sa_handler != SIG_IGN){
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ret = sigaction(SIGHUP, &new_action, NULL);
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150
if(ret == -1){
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151
perror("sigaction");
209
return EX_OSERR;
152
return EXIT_FAILURE;
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153
}
211
154
}
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ret = sigaction(SIGTERM, NULL, &old_action);
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if(ret == -1){
214
157
perror("sigaction");
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return EX_OSERR;
158
return EXIT_FAILURE;
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159
}
217
if(old_action.sa_handler != SIG_IGN){
160
if (old_action.sa_handler != SIG_IGN){
218
161
ret = sigaction(SIGTERM, &new_action, NULL);
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162
if(ret == -1){
220
163
perror("sigaction");
221
return EX_OSERR;
164
return EXIT_FAILURE;
222
165
}
223
166
}
224
167
225
168
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if(debug){
169
if (debug){
227
170
fprintf(stderr, "Removing echo flag from terminal attributes\n");
228
171
}
229
172
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t_new = t_old;
231
t_new.c_lflag &= ~(tcflag_t)ECHO;
232
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
233
int e = errno;
174
t_new.c_lflag &= ~ECHO;
175
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
176
perror("tcsetattr-echo");
235
switch(e){
236
case EBADF:
237
case ENOTTY:
238
return EX_UNAVAILABLE;
239
case EINVAL:
240
default:
241
return EX_OSERR;
242
}
177
return EXIT_FAILURE;
243
178
}
244
245
if(debug){
179
180
if (debug){
246
181
fprintf(stderr, "Waiting for input from stdin \n");
247
182
}
248
183
while(true){
249
if(quit_now){
184
if (quit_now){
250
185
if(debug){
251
186
fprintf(stderr, "Interrupted by signal, exiting.\n");
252
187
}
258
193
fprintf(stderr, "%s ", prefix);
259
194
}
260
195
{
261
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
262
const char *crypttarget = getenv("CRYPTTAB_NAME");
263
/* Before cryptsetup 1.1.0~rc2 */
264
if(cryptsource == NULL){
265
cryptsource = getenv("cryptsource");
266
}
267
if(crypttarget == NULL){
268
crypttarget = getenv("crypttarget");
269
}
270
const char *const prompt1 = "Unlocking the disk";
271
const char *const prompt2 = "Enter passphrase";
196
const char *cryptsource = getenv("cryptsource");
197
const char *crypttarget = getenv("crypttarget");
198
const char *const prompt
199
= "Enter passphrase to unlock the disk";
272
200
if(cryptsource == NULL){
273
201
if(crypttarget == NULL){
274
fprintf(stderr, "%s to unlock the disk: ", prompt2);
202
fprintf(stderr, "%s: ", prompt);
275
203
} else {
276
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
277
prompt2);
204
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
278
205
}
279
206
} else {
280
207
if(crypttarget == NULL){
281
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
282
prompt2);
208
fprintf(stderr, "%s %s: ", prompt, cryptsource);
283
209
} else {
284
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
285
crypttarget, prompt2);
210
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
211
crypttarget);
286
212
}
287
213
}
288
214
}
289
215
ret = getline(&buffer, &n, stdin);
290
if(ret > 0){
216
if (ret > 0){
291
217
status = EXIT_SUCCESS;
292
218
/* Make n = data size instead of allocated buffer size */
293
219
n = (size_t)ret;
294
220
/* Strip final newline */
295
if(n > 0 and buffer[n-1] == '\n'){
221
if(n>0 and buffer[n-1] == '\n'){
296
222
buffer[n-1] = '\0'; /* not strictly necessary */
297
223
n--;
298
224
}
300
226
while(written < n){
301
227
ret = write(STDOUT_FILENO, buffer + written, n - written);
302
228
if(ret < 0){
303
int e = errno;
304
229
perror("write");
305
switch(e){
306
case EBADF:
307
case EFAULT:
308
case EINVAL:
309
case EFBIG:
310
case EIO:
311
case ENOSPC:
312
default:
313
status = EX_IOERR;
314
break;
315
case EINTR:
316
status = EXIT_FAILURE;
317
break;
318
}
230
status = EXIT_FAILURE;
319
231
break;
320
232
}
321
233
written += (size_t)ret;
322
234
}
323
ret = close(STDOUT_FILENO);
324
if(ret == -1){
325
int e = errno;
326
perror("close");
327
switch(e){
328
case EBADF:
329
status = EX_OSFILE;
330
break;
331
case EIO:
332
default:
333
status = EX_IOERR;
334
break;
335
}
336
}
337
235
break;
338
236
}
339
if(ret < 0){
340
int e = errno;
341
if(errno != EINTR and not feof(stdin)){
237
if (ret < 0){
238
if (errno != EINTR and not feof(stdin)){
342
239
perror("getline");
343
switch(e){
344
case EBADF:
345
status = EX_UNAVAILABLE;
346
case EIO:
347
case EINVAL:
348
default:
349
status = EX_IOERR;
350
break;
351
}
240
status = EXIT_FAILURE;
352
241
break;
353
242
}
354
243
}
356
245
read from stdin */
357
246
fputc('\n', stderr);
358
247
if(debug and not quit_now){
359
/* If quit_now is nonzero, we were interrupted by a signal, and
248
/* If quit_now is true, we were interrupted by a signal, and
360
249
will print that later, so no need to show this too. */
361
250
fprintf(stderr, "getline() returned 0, retrying.\n");
362
251
}
364
253
365
254
free(buffer);
366
255
367
if(debug){
256
if (debug){
368
257
fprintf(stderr, "Restoring terminal attributes\n");
369
258
}
370
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
259
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
371
260
perror("tcsetattr+echo");
372
261
}
373
262
374
if(quit_now){
375
sigemptyset(&old_action.sa_mask);
376
old_action.sa_handler = SIG_DFL;
377
ret = sigaction(signal_received, &old_action, NULL);
378
if(ret == -1){
379
perror("sigaction");
380
}
381
raise(signal_received);
382
}
383
384
if(debug){
263
if (debug){
385
264
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
386
265
status);
387
266
}
388
if(status == EXIT_SUCCESS or status == EX_OK){
267
if(status == EXIT_SUCCESS){
389
268
fputc('\n', stderr);
390
269
}
391
270
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