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- Committer: Teddy Hogeborn
- Date: 2019-03-06 22:07:48 UTC
- Revision ID: teddy@recompile.se-20190306220748-wfxlbmehw0mny8mn
mandos-ctl: Fix bugs
* mandos-ctl (SetSecretCommand): Argument is file object, not string.
(commands_from_options): Fix "command" to "commands" throughout. Add
option argument to SetCheckerCmd().
(TestSetSecretCmd): Set file objects, not byte strings.
* mandos-ctl (SetSecretCommand): Argument is file object, not string.
(commands_from_options): Fix "command" to "commands" throughout. Add
option argument to SetCheckerCmd().
(TestSetSecretCmd): Set file objects, not byte strings.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
plugins.d/usplash.c
2
2
/*
3
3
* Usplash - Read a password from usplash and output it
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
7
*
8
* This program is free software: you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
12
*
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
7
*
8
* This file is part of Mandos.
9
*
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
14
*
15
* Mandos is distributed in the hope that it will be useful, but
14
16
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
17
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
18
* General Public License for more details.
17
19
*
18
20
* You should have received a copy of the GNU General Public License
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
21
22
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
* Contact the authors at <mandos@recompile.se>.
23
24
*/
24
25
25
#define _GNU_SOURCE /* asprintf() */
26
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
26
27
#include <signal.h> /* sig_atomic_t, struct sigaction,
27
28
sigemptyset(), sigaddset(), SIGINT,
28
29
SIGHUP, SIGTERM, sigaction(),
31
32
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
32
33
#include <iso646.h> /* and, or, not*/
33
34
#include <errno.h> /* errno, EINTR */
35
#include <error.h>
34
36
#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR, struct
35
37
dirent */
36
38
#include <stddef.h> /* NULL */
37
#include <string.h> /* strlen(), memcmp() */
38
#include <stdio.h> /* asprintf(), perror() */
39
#include <string.h> /* strlen(), memcmp(), strerror() */
40
#include <stdio.h> /* asprintf(), vasprintf(), vprintf(),
41
fprintf() */
39
42
#include <unistd.h> /* close(), write(), readlink(),
40
43
read(), STDOUT_FILENO, sleep(),
41
44
fork(), setuid(), geteuid(),
42
45
setsid(), chdir(), dup2(),
43
46
STDERR_FILENO, execv() */
44
47
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
45
EXIT_SUCCESS, malloc(), _exit() */
46
#include <stdlib.h> /* getenv() */
48
EXIT_SUCCESS, malloc(), _exit(),
49
getenv() */
47
50
#include <dirent.h> /* opendir(), readdir(), closedir() */
48
51
#include <inttypes.h> /* intmax_t, strtoimax() */
49
52
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
53
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
54
#include <argz.h> /* argz_count(), argz_extract() */
55
#include <stdarg.h> /* va_list, va_start(), ... */
50
56
51
57
sig_atomic_t interrupted_by_signal = 0;
52
53
static void termination_handler(__attribute__((unused))int signum){
58
int signal_received;
59
const char usplash_name[] = "/sbin/usplash";
60
61
/* Function to use when printing errors */
62
__attribute__((format (gnu_printf, 3, 4)))
63
void error_plus(int status, int errnum, const char *formatstring,
64
...){
65
va_list ap;
66
char *text;
67
int ret;
68
69
va_start(ap, formatstring);
70
ret = vasprintf(&text, formatstring, ap);
71
if(ret == -1){
72
fprintf(stderr, "Mandos plugin %s: ",
73
program_invocation_short_name);
74
vfprintf(stderr, formatstring, ap);
75
fprintf(stderr, ": ");
76
fprintf(stderr, "%s\n", strerror(errnum));
77
error(status, errno, "vasprintf while printing error");
78
return;
79
}
80
fprintf(stderr, "Mandos plugin ");
81
error(status, errnum, "%s", text);
82
free(text);
83
}
84
85
static void termination_handler(int signum){
86
if(interrupted_by_signal){
87
return;
88
}
54
89
interrupted_by_signal = 1;
90
signal_received = signum;
55
91
}
56
92
57
static bool usplash_write(const char *cmd, const char *arg){
93
static bool usplash_write(int *fifo_fd_r,
94
const char *cmd, const char *arg){
58
95
/*
59
* usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
60
* usplash_write("PULSATE", NULL) will write "PULSATE\0"
96
* usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
97
* usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
61
98
* SEE ALSO
62
99
* usplash_write(8)
63
100
*/
64
101
int ret;
65
int fifo_fd;
66
do {
67
fifo_fd = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
68
if(fifo_fd == -1 and (errno != EINTR or interrupted_by_signal)){
102
if(*fifo_fd_r == -1){
103
ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
104
if(ret == -1){
69
105
return false;
70
106
}
71
} while(fifo_fd == -1);
107
*fifo_fd_r = ret;
108
}
72
109
73
110
const char *cmd_line;
74
111
size_t cmd_line_len;
75
112
char *cmd_line_alloc = NULL;
76
113
if(arg == NULL){
77
114
cmd_line = cmd;
78
cmd_line_len = strlen(cmd);
115
cmd_line_len = strlen(cmd) + 1;
79
116
} else {
80
117
do {
81
118
ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
82
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
119
if(ret == -1){
83
120
int e = errno;
84
close(fifo_fd);
121
close(*fifo_fd_r);
85
122
errno = e;
86
123
return false;
87
124
}
92
129
93
130
size_t written = 0;
94
131
ssize_t sret = 0;
95
while(not interrupted_by_signal and written < cmd_line_len){
96
sret = write(fifo_fd, cmd_line + written,
132
while(written < cmd_line_len){
133
sret = write(*fifo_fd_r, cmd_line + written,
97
134
cmd_line_len - written);
98
135
if(sret == -1){
99
if(errno != EINTR or interrupted_by_signal){
100
int e = errno;
101
close(fifo_fd);
102
free(cmd_line_alloc);
103
errno = e;
104
return false;
105
} else {
106
continue;
107
}
136
int e = errno;
137
close(*fifo_fd_r);
138
free(cmd_line_alloc);
139
errno = e;
140
return false;
108
141
}
109
142
written += (size_t)sret;
110
143
}
111
144
free(cmd_line_alloc);
112
do {
113
ret = close(fifo_fd);
114
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
115
return false;
116
}
117
} while(ret == -1);
118
if(interrupted_by_signal){
119
return false;
120
}
145
121
146
return true;
122
147
}
123
148
149
/* Create prompt string */
150
char *makeprompt(void){
151
int ret = 0;
152
char *prompt;
153
const char *const cryptsource = getenv("cryptsource");
154
const char *const crypttarget = getenv("crypttarget");
155
const char prompt_start[] = "Enter passphrase to unlock the disk";
156
157
if(cryptsource == NULL){
158
if(crypttarget == NULL){
159
ret = asprintf(&prompt, "%s: ", prompt_start);
160
} else {
161
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
162
crypttarget);
163
}
164
} else {
165
if(crypttarget == NULL){
166
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
167
} else {
168
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
169
cryptsource, crypttarget);
170
}
171
}
172
if(ret == -1){
173
return NULL;
174
}
175
return prompt;
176
}
177
178
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
179
int ret = 0;
180
ssize_t sret = 0;
181
char *cmdline = NULL;
182
size_t cmdline_len = 0;
183
DIR *proc_dir = opendir("/proc");
184
if(proc_dir == NULL){
185
error_plus(0, errno, "opendir");
186
return -1;
187
}
188
errno = 0;
189
for(struct dirent *proc_ent = readdir(proc_dir);
190
proc_ent != NULL;
191
proc_ent = readdir(proc_dir)){
192
pid_t pid;
193
{
194
intmax_t tmpmax;
195
char *tmp;
196
tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
197
if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
198
or tmpmax != (pid_t)tmpmax){
199
/* Not a process */
200
errno = 0;
201
continue;
202
}
203
pid = (pid_t)tmpmax;
204
}
205
/* Find the executable name by doing readlink() on the
206
/proc/<pid>/exe link */
207
char exe_target[sizeof(usplash_name)];
208
{
209
/* create file name string */
210
char *exe_link;
211
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
212
if(ret == -1){
213
error_plus(0, errno, "asprintf");
214
goto fail_find_usplash;
215
}
216
217
/* Check that it refers to a symlink owned by root:root */
218
struct stat exe_stat;
219
ret = lstat(exe_link, &exe_stat);
220
if(ret == -1){
221
if(errno == ENOENT){
222
free(exe_link);
223
continue;
224
}
225
error_plus(0, errno, "lstat");
226
free(exe_link);
227
goto fail_find_usplash;
228
}
229
if(not S_ISLNK(exe_stat.st_mode)
230
or exe_stat.st_uid != 0
231
or exe_stat.st_gid != 0){
232
free(exe_link);
233
continue;
234
}
235
236
sret = readlink(exe_link, exe_target, sizeof(exe_target));
237
free(exe_link);
238
}
239
/* Compare executable name */
240
if((sret != ((ssize_t)sizeof(exe_target)-1))
241
or (memcmp(usplash_name, exe_target,
242
sizeof(exe_target)-1) != 0)){
243
/* Not it */
244
continue;
245
}
246
/* Found usplash */
247
/* Read and save the command line of usplash in "cmdline" */
248
{
249
/* Open /proc/<pid>/cmdline */
250
int cl_fd;
251
{
252
char *cmdline_filename;
253
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
254
proc_ent->d_name);
255
if(ret == -1){
256
error_plus(0, errno, "asprintf");
257
goto fail_find_usplash;
258
}
259
cl_fd = open(cmdline_filename, O_RDONLY);
260
free(cmdline_filename);
261
if(cl_fd == -1){
262
error_plus(0, errno, "open");
263
goto fail_find_usplash;
264
}
265
}
266
size_t cmdline_allocated = 0;
267
char *tmp;
268
const size_t blocksize = 1024;
269
do {
270
/* Allocate more space? */
271
if(cmdline_len + blocksize > cmdline_allocated){
272
tmp = realloc(cmdline, cmdline_allocated + blocksize);
273
if(tmp == NULL){
274
error_plus(0, errno, "realloc");
275
close(cl_fd);
276
goto fail_find_usplash;
277
}
278
cmdline = tmp;
279
cmdline_allocated += blocksize;
280
}
281
/* Read data */
282
sret = read(cl_fd, cmdline + cmdline_len,
283
cmdline_allocated - cmdline_len);
284
if(sret == -1){
285
error_plus(0, errno, "read");
286
close(cl_fd);
287
goto fail_find_usplash;
288
}
289
cmdline_len += (size_t)sret;
290
} while(sret != 0);
291
ret = close(cl_fd);
292
if(ret == -1){
293
error_plus(0, errno, "close");
294
goto fail_find_usplash;
295
}
296
}
297
/* Close directory */
298
ret = closedir(proc_dir);
299
if(ret == -1){
300
error_plus(0, errno, "closedir");
301
goto fail_find_usplash;
302
}
303
/* Success */
304
*cmdline_r = cmdline;
305
*cmdline_len_r = cmdline_len;
306
return pid;
307
}
308
309
fail_find_usplash:
310
311
free(cmdline);
312
if(proc_dir != NULL){
313
int e = errno;
314
closedir(proc_dir);
315
errno = e;
316
}
317
return 0;
318
}
319
124
320
int main(__attribute__((unused))int argc,
125
321
__attribute__((unused))char **argv){
126
322
int ret = 0;
127
323
ssize_t sret;
128
bool an_error_occured = false;
324
int fifo_fd = -1;
325
int outfifo_fd = -1;
326
char *buf = NULL;
327
size_t buf_len = 0;
328
pid_t usplash_pid = -1;
329
bool usplash_accessed = false;
330
int status = EXIT_FAILURE; /* Default failure exit status */
129
331
130
/* Create prompt string */
131
char *prompt = NULL;
132
{
133
const char *const cryptsource = getenv("cryptsource");
134
const char *const crypttarget = getenv("crypttarget");
135
const char prompt_start[] = "Enter passphrase to unlock the disk";
136
137
if(cryptsource == NULL){
138
if(crypttarget == NULL){
139
ret = asprintf(&prompt, "%s: ", prompt_start);
140
} else {
141
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
142
crypttarget);
143
}
144
} else {
145
if(crypttarget == NULL){
146
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
147
} else {
148
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
149
cryptsource, crypttarget);
150
}
151
}
152
if(ret == -1){
153
return EXIT_FAILURE;
154
}
332
char *prompt = makeprompt();
333
if(prompt == NULL){
334
status = EX_OSERR;
335
goto failure;
155
336
}
156
337
157
338
/* Find usplash process */
158
pid_t usplash_pid = 0;
159
339
char *cmdline = NULL;
160
340
size_t cmdline_len = 0;
161
const char usplash_name[] = "/sbin/usplash";
162
{
163
DIR *proc_dir = opendir("/proc");
164
if(proc_dir == NULL){
165
free(prompt);
166
perror("opendir");
167
return EXIT_FAILURE;
168
}
169
for(struct dirent *proc_ent = readdir(proc_dir);
170
proc_ent != NULL;
171
proc_ent = readdir(proc_dir)){
172
pid_t pid;
173
{
174
intmax_t tmpmax;
175
char *tmp;
176
errno = 0;
177
tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
178
if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
179
or tmpmax != (pid_t)tmpmax){
180
/* Not a process */
181
continue;
182
}
183
pid = (pid_t)tmpmax;
184
}
185
/* Find the executable name by doing readlink() on the
186
/proc/<pid>/exe link */
187
char exe_target[sizeof(usplash_name)];
188
{
189
/* create file name string */
190
char *exe_link;
191
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
192
if(ret == -1){
193
perror("asprintf");
194
free(prompt);
195
closedir(proc_dir);
196
return EXIT_FAILURE;
197
}
198
199
/* Check that it refers to a symlink owned by root:root */
200
struct stat exe_stat;
201
ret = lstat(exe_link, &exe_stat);
202
if(ret == -1){
203
if(errno == ENOENT){
204
free(exe_link);
205
continue;
206
}
207
perror("lstat");
208
free(exe_link);
209
free(prompt);
210
closedir(proc_dir);
211
return EXIT_FAILURE;
212
}
213
if(not S_ISLNK(exe_stat.st_mode)
214
or exe_stat.st_uid != 0
215
or exe_stat.st_gid != 0){
216
free(exe_link);
217
continue;
218
}
219
220
sret = readlink(exe_link, exe_target, sizeof(exe_target));
221
free(exe_link);
222
}
223
if((sret == ((ssize_t)sizeof(exe_target)-1))
224
and (memcmp(usplash_name, exe_target,
225
sizeof(exe_target)-1) == 0)){
226
usplash_pid = pid;
227
/* Read and save the command line of usplash in "cmdline" */
228
{
229
/* Open /proc/<pid>/cmdline */
230
int cl_fd;
231
{
232
char *cmdline_filename;
233
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
234
proc_ent->d_name);
235
if(ret == -1){
236
perror("asprintf");
237
free(prompt);
238
closedir(proc_dir);
239
return EXIT_FAILURE;
240
}
241
cl_fd = open(cmdline_filename, O_RDONLY);
242
if(cl_fd == -1){
243
perror("open");
244
free(cmdline_filename);
245
free(prompt);
246
closedir(proc_dir);
247
return EXIT_FAILURE;
248
}
249
free(cmdline_filename);
250
}
251
size_t cmdline_allocated = 0;
252
char *tmp;
253
const size_t blocksize = 1024;
254
do {
255
if(cmdline_len + blocksize > cmdline_allocated){
256
tmp = realloc(cmdline, cmdline_allocated + blocksize);
257
if(tmp == NULL){
258
perror("realloc");
259
free(cmdline);
260
free(prompt);
261
closedir(proc_dir);
262
return EXIT_FAILURE;
263
}
264
cmdline = tmp;
265
cmdline_allocated += blocksize;
266
}
267
sret = read(cl_fd, cmdline + cmdline_len,
268
cmdline_allocated - cmdline_len);
269
if(sret == -1){
270
perror("read");
271
free(cmdline);
272
free(prompt);
273
closedir(proc_dir);
274
return EXIT_FAILURE;
275
}
276
cmdline_len += (size_t)sret;
277
} while(sret != 0);
278
close(cl_fd);
279
}
280
break;
281
}
282
}
283
closedir(proc_dir);
284
}
341
usplash_pid = find_usplash(&cmdline, &cmdline_len);
285
342
if(usplash_pid == 0){
286
free(prompt);
287
return EXIT_FAILURE;
343
status = EX_UNAVAILABLE;
344
goto failure;
288
345
}
289
346
290
347
/* Set up the signal handler */
293
350
new_action = { .sa_handler = termination_handler,
294
351
.sa_flags = 0 };
295
352
sigemptyset(&new_action.sa_mask);
296
sigaddset(&new_action.sa_mask, SIGINT);
297
sigaddset(&new_action.sa_mask, SIGHUP);
298
sigaddset(&new_action.sa_mask, SIGTERM);
353
ret = sigaddset(&new_action.sa_mask, SIGINT);
354
if(ret == -1){
355
error_plus(0, errno, "sigaddset");
356
status = EX_OSERR;
357
goto failure;
358
}
359
ret = sigaddset(&new_action.sa_mask, SIGHUP);
360
if(ret == -1){
361
error_plus(0, errno, "sigaddset");
362
status = EX_OSERR;
363
goto failure;
364
}
365
ret = sigaddset(&new_action.sa_mask, SIGTERM);
366
if(ret == -1){
367
error_plus(0, errno, "sigaddset");
368
status = EX_OSERR;
369
goto failure;
370
}
299
371
ret = sigaction(SIGINT, NULL, &old_action);
300
372
if(ret == -1){
301
perror("sigaction");
302
free(prompt);
303
return EXIT_FAILURE;
373
if(errno != EINTR){
374
error_plus(0, errno, "sigaction");
375
status = EX_OSERR;
376
}
377
goto failure;
304
378
}
305
379
if(old_action.sa_handler != SIG_IGN){
306
380
ret = sigaction(SIGINT, &new_action, NULL);
307
381
if(ret == -1){
308
perror("sigaction");
309
free(prompt);
310
return EXIT_FAILURE;
382
if(errno != EINTR){
383
error_plus(0, errno, "sigaction");
384
status = EX_OSERR;
385
}
386
goto failure;
311
387
}
312
388
}
313
389
ret = sigaction(SIGHUP, NULL, &old_action);
314
390
if(ret == -1){
315
perror("sigaction");
316
free(prompt);
317
return EXIT_FAILURE;
391
if(errno != EINTR){
392
error_plus(0, errno, "sigaction");
393
status = EX_OSERR;
394
}
395
goto failure;
318
396
}
319
397
if(old_action.sa_handler != SIG_IGN){
320
398
ret = sigaction(SIGHUP, &new_action, NULL);
321
399
if(ret == -1){
322
perror("sigaction");
323
free(prompt);
324
return EXIT_FAILURE;
400
if(errno != EINTR){
401
error_plus(0, errno, "sigaction");
402
status = EX_OSERR;
403
}
404
goto failure;
325
405
}
326
406
}
327
407
ret = sigaction(SIGTERM, NULL, &old_action);
328
408
if(ret == -1){
329
perror("sigaction");
330
free(prompt);
331
return EXIT_FAILURE;
409
if(errno != EINTR){
410
error_plus(0, errno, "sigaction");
411
status = EX_OSERR;
412
}
413
goto failure;
332
414
}
333
415
if(old_action.sa_handler != SIG_IGN){
334
416
ret = sigaction(SIGTERM, &new_action, NULL);
335
417
if(ret == -1){
336
perror("sigaction");
337
free(prompt);
338
return EXIT_FAILURE;
418
if(errno != EINTR){
419
error_plus(0, errno, "sigaction");
420
status = EX_OSERR;
421
}
422
goto failure;
339
423
}
340
424
}
341
425
}
342
426
427
usplash_accessed = true;
343
428
/* Write command to FIFO */
344
if(not interrupted_by_signal){
345
if(not usplash_write("TIMEOUT", "0")
346
and (errno != EINTR)){
347
perror("usplash_write");
348
an_error_occured = true;
349
}
350
}
351
if(not interrupted_by_signal and not an_error_occured){
352
if(not usplash_write("INPUTQUIET", prompt)
353
and (errno != EINTR)){
354
perror("usplash_write");
355
an_error_occured = true;
356
}
357
}
429
if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
430
if(errno != EINTR){
431
error_plus(0, errno, "usplash_write");
432
status = EX_OSERR;
433
}
434
goto failure;
435
}
436
437
if(interrupted_by_signal){
438
goto failure;
439
}
440
441
if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
442
if(errno != EINTR){
443
error_plus(0, errno, "usplash_write");
444
status = EX_OSERR;
445
}
446
goto failure;
447
}
448
449
if(interrupted_by_signal){
450
goto failure;
451
}
452
358
453
free(prompt);
359
360
/* This is not really a loop; while() is used to be able to "break"
361
out of it; those breaks are marked "Big" */
362
while(not interrupted_by_signal and not an_error_occured){
363
char *buf = NULL;
364
size_t buf_len = 0;
365
366
/* Open FIFO */
367
int fifo_fd;
368
do {
369
fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
370
if(fifo_fd == -1){
371
if(errno != EINTR){
372
perror("open");
373
an_error_occured = true;
374
break;
375
}
376
if(interrupted_by_signal){
377
break;
378
}
379
}
380
} while(fifo_fd == -1);
381
if(interrupted_by_signal or an_error_occured){
382
break; /* Big */
383
}
384
385
/* Read from FIFO */
386
size_t buf_allocated = 0;
387
const size_t blocksize = 1024;
388
do {
389
if(buf_len + blocksize > buf_allocated){
390
char *tmp = realloc(buf, buf_allocated + blocksize);
391
if(tmp == NULL){
392
perror("realloc");
393
an_error_occured = true;
394
break;
395
}
396
buf = tmp;
397
buf_allocated += blocksize;
398
}
399
do {
400
sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
401
if(sret == -1){
402
if(errno != EINTR){
403
perror("read");
404
an_error_occured = true;
405
break;
406
}
407
if(interrupted_by_signal){
408
break;
409
}
410
}
411
} while(sret == -1);
412
if(interrupted_by_signal or an_error_occured){
413
break;
414
}
415
416
buf_len += (size_t)sret;
417
} while(sret != 0);
418
close(fifo_fd);
419
if(interrupted_by_signal or an_error_occured){
420
break; /* Big */
421
}
422
423
if(not usplash_write("TIMEOUT", "15")
424
and (errno != EINTR)){
425
perror("usplash_write");
426
an_error_occured = true;
427
}
428
if(interrupted_by_signal or an_error_occured){
429
break; /* Big */
430
}
431
432
/* Print password to stdout */
433
size_t written = 0;
434
while(written < buf_len){
435
do {
436
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
437
if(sret == -1){
438
if(errno != EINTR){
439
perror("write");
440
an_error_occured = true;
441
break;
442
}
443
if(interrupted_by_signal){
444
break;
445
}
446
}
447
} while(sret == -1);
448
if(interrupted_by_signal or an_error_occured){
449
break;
450
}
451
written += (size_t)sret;
452
}
453
free(buf);
454
if(not interrupted_by_signal and not an_error_occured){
455
free(cmdline);
456
return EXIT_SUCCESS;
457
}
458
break; /* Big */
459
} /* end of non-loop while() */
460
461
/* If we got here, an error or interrupt must have happened */
462
463
/* Create argc and argv for new usplash*/
464
int cmdline_argc = 0;
465
char **cmdline_argv = malloc(sizeof(char *));
466
{
467
size_t position = 0;
468
while(position < cmdline_len){
469
char **tmp = realloc(cmdline_argv,
470
(sizeof(char *)
471
* (size_t)(cmdline_argc + 2)));
454
prompt = NULL;
455
456
/* Read reply from usplash */
457
/* Open FIFO */
458
outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
459
if(outfifo_fd == -1){
460
if(errno != EINTR){
461
error_plus(0, errno, "open");
462
status = EX_OSERR;
463
}
464
goto failure;
465
}
466
467
if(interrupted_by_signal){
468
goto failure;
469
}
470
471
/* Read from FIFO */
472
size_t buf_allocated = 0;
473
const size_t blocksize = 1024;
474
do {
475
/* Allocate more space */
476
if(buf_len + blocksize > buf_allocated){
477
char *tmp = realloc(buf, buf_allocated + blocksize);
472
478
if(tmp == NULL){
473
perror("realloc");
474
free(cmdline_argv);
475
return EXIT_FAILURE;
476
}
477
cmdline_argv = tmp;
478
cmdline_argv[cmdline_argc] = cmdline + position;
479
cmdline_argc++;
480
position += strlen(cmdline + position) + 1;
481
}
482
cmdline_argv[cmdline_argc] = NULL;
483
}
479
if(errno != EINTR){
480
error_plus(0, errno, "realloc");
481
status = EX_OSERR;
482
}
483
goto failure;
484
}
485
buf = tmp;
486
buf_allocated += blocksize;
487
}
488
sret = read(outfifo_fd, buf + buf_len,
489
buf_allocated - buf_len);
490
if(sret == -1){
491
if(errno != EINTR){
492
error_plus(0, errno, "read");
493
status = EX_OSERR;
494
}
495
close(outfifo_fd);
496
goto failure;
497
}
498
if(interrupted_by_signal){
499
break;
500
}
501
502
buf_len += (size_t)sret;
503
} while(sret != 0);
504
ret = close(outfifo_fd);
505
if(ret == -1){
506
if(errno != EINTR){
507
error_plus(0, errno, "close");
508
status = EX_OSERR;
509
}
510
goto failure;
511
}
512
outfifo_fd = -1;
513
514
if(interrupted_by_signal){
515
goto failure;
516
}
517
518
if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
519
if(errno != EINTR){
520
error_plus(0, errno, "usplash_write");
521
status = EX_OSERR;
522
}
523
goto failure;
524
}
525
526
if(interrupted_by_signal){
527
goto failure;
528
}
529
530
ret = close(fifo_fd);
531
if(ret == -1){
532
if(errno != EINTR){
533
error_plus(0, errno, "close");
534
status = EX_OSERR;
535
}
536
goto failure;
537
}
538
fifo_fd = -1;
539
540
/* Print password to stdout */
541
size_t written = 0;
542
while(written < buf_len){
543
do {
544
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
545
if(sret == -1){
546
if(errno != EINTR){
547
error_plus(0, errno, "write");
548
status = EX_OSERR;
549
}
550
goto failure;
551
}
552
} while(sret == -1);
553
554
if(interrupted_by_signal){
555
goto failure;
556
}
557
written += (size_t)sret;
558
}
559
free(buf);
560
buf = NULL;
561
562
if(interrupted_by_signal){
563
goto failure;
564
}
565
566
free(cmdline);
567
return EXIT_SUCCESS;
568
569
failure:
570
571
free(buf);
572
573
free(prompt);
574
575
/* If usplash was never accessed, we can stop now */
576
if(not usplash_accessed){
577
return status;
578
}
579
580
/* Close FIFO */
581
if(fifo_fd != -1){
582
ret = close(fifo_fd);
583
if(ret == -1 and errno != EINTR){
584
error_plus(0, errno, "close");
585
}
586
fifo_fd = -1;
587
}
588
589
/* Close output FIFO */
590
if(outfifo_fd != -1){
591
ret = close(outfifo_fd);
592
if(ret == -1){
593
error_plus(0, errno, "close");
594
}
595
}
596
597
/* Create argv for new usplash*/
598
char **cmdline_argv = malloc((argz_count(cmdline, cmdline_len) + 1)
599
* sizeof(char *)); /* Count args */
600
if(cmdline_argv == NULL){
601
error_plus(0, errno, "malloc");
602
return status;
603
}
604
argz_extract(cmdline, cmdline_len, cmdline_argv); /* Create argv */
605
484
606
/* Kill old usplash */
485
607
kill(usplash_pid, SIGTERM);
486
608
sleep(2);
488
610
kill(usplash_pid, SIGKILL);
489
611
sleep(1);
490
612
}
613
491
614
pid_t new_usplash_pid = fork();
492
615
if(new_usplash_pid == 0){
493
616
/* Child; will become new usplash process */
496
619
the real user ID (_mandos) */
497
620
ret = setuid(geteuid());
498
621
if(ret == -1){
499
perror("setuid");
622
error_plus(0, errno, "setuid");
500
623
}
501
624
502
625
setsid();
503
626
ret = chdir("/");
627
if(ret == -1){
628
error_plus(0, errno, "chdir");
629
_exit(EX_OSERR);
630
}
504
631
/* if(fork() != 0){ */
505
632
/* _exit(EXIT_SUCCESS); */
506
633
/* } */
507
634
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
508
635
if(ret == -1){
509
perror("dup2");
510
_exit(EXIT_FAILURE);
636
error_plus(0, errno, "dup2");
637
_exit(EX_OSERR);
511
638
}
512
639
513
640
execv(usplash_name, cmdline_argv);
514
641
if(not interrupted_by_signal){
515
perror("execv");
642
error_plus(0, errno, "execv");
516
643
}
517
644
free(cmdline);
518
645
free(cmdline_argv);
519
_exit(EXIT_FAILURE);
646
_exit(EX_OSERR);
520
647
}
521
648
free(cmdline);
522
649
free(cmdline_argv);
523
650
sleep(2);
524
if(not usplash_write("PULSATE", NULL)
525
and (errno != EINTR)){
526
perror("usplash_write");
527
}
528
529
return EXIT_FAILURE;
651
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
652
if(errno != EINTR){
653
error_plus(0, errno, "usplash_write");
654
}
655
}
656
657
/* Close FIFO (again) */
658
if(fifo_fd != -1){
659
ret = close(fifo_fd);
660
if(ret == -1 and errno != EINTR){
661
error_plus(0, errno, "close");
662
}
663
fifo_fd = -1;
664
}
665
666
if(interrupted_by_signal){
667
struct sigaction signal_action = { .sa_handler = SIG_DFL };
668
sigemptyset(&signal_action.sa_mask);
669
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
670
&signal_action, NULL));
671
if(ret == -1){
672
error_plus(0, errno, "sigaction");
673
}
674
do {
675
ret = raise(signal_received);
676
} while(ret != 0 and errno == EINTR);
677
if(ret != 0){
678
error_plus(0, errno, "raise");
679
abort();
680
}
681
TEMP_FAILURE_RETRY(pause());
682
}
683
684
return status;
530
685
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0