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- Committer: Teddy Hogeborn
- Date: 2009-02-05 03:37:06 UTC
- Revision ID: teddy@fukt.bsnet.se-20090205033706-unwxpqdwzgv84lux
* plugin-runner.c (main): Bug fix: Do setgid before setuid.
- files removed:
- dbus-mandos.conf
- files modified:
- INSTALL
added
removed
plugins.d/usplash.c
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
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
26
#define _GNU_SOURCE /* asprintf() */
26
27
#include <signal.h> /* sig_atomic_t, struct sigaction,
27
28
sigemptyset(), sigaddset(), SIGINT,
28
29
SIGHUP, SIGTERM, sigaction(),
35
36
dirent */
36
37
#include <stddef.h> /* NULL */
37
38
#include <string.h> /* strlen(), memcmp() */
38
#include <stdio.h> /* asprintf(), perror() */
39
#include <stdio.h> /* asprintf(), perror(), sscanf() */
39
40
#include <unistd.h> /* close(), write(), readlink(),
40
41
read(), STDOUT_FILENO, sleep(),
41
42
fork(), setuid(), geteuid(),
45
46
EXIT_SUCCESS, malloc(), _exit() */
46
47
#include <stdlib.h> /* getenv() */
47
48
#include <dirent.h> /* opendir(), readdir(), closedir() */
48
#include <inttypes.h> /* intmax_t, strtoimax() */
49
#include <inttypes.h> /* intmax_t, SCNdMAX */
49
50
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
50
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
51
51
52
52
sig_atomic_t interrupted_by_signal = 0;
53
int signal_received;
54
const char usplash_name[] = "/sbin/usplash";
55
53
56
static void termination_handler(int signum){
57
if(interrupted_by_signal){
58
return;
59
}
54
static void termination_handler(__attribute__((unused))int signum){
60
55
interrupted_by_signal = 1;
61
signal_received = signum;
62
56
}
63
57
64
static bool usplash_write(int *fifo_fd_r,
65
const char *cmd, const char *arg){
58
static bool usplash_write(const char *cmd, const char *arg){
66
59
/*
67
* usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
68
* usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
60
* usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
61
* usplash_write("PULSATE", NULL) will write "PULSATE\0"
69
62
* SEE ALSO
70
63
* usplash_write(8)
71
64
*/
72
65
int ret;
73
if(*fifo_fd_r == -1){
74
ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
75
if(ret == -1){
66
int fifo_fd;
67
do{
68
fifo_fd = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
69
if(fifo_fd == -1 and (errno != EINTR or interrupted_by_signal)){
76
70
return false;
77
71
}
78
*fifo_fd_r = ret;
79
}
72
}while(fifo_fd == -1);
80
73
81
74
const char *cmd_line;
82
75
size_t cmd_line_len;
83
76
char *cmd_line_alloc = NULL;
84
77
if(arg == NULL){
85
78
cmd_line = cmd;
86
cmd_line_len = strlen(cmd) + 1;
87
} else {
88
do {
79
cmd_line_len = strlen(cmd);
80
}else{
81
do{
89
82
ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
90
if(ret == -1){
83
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
91
84
int e = errno;
92
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
85
close(fifo_fd);
93
86
errno = e;
94
87
return false;
95
88
}
96
} while(ret == -1);
89
}while(ret == -1);
97
90
cmd_line = cmd_line_alloc;
98
91
cmd_line_len = (size_t)ret + 1;
99
92
}
100
93
101
94
size_t written = 0;
102
95
ssize_t sret = 0;
103
while(written < cmd_line_len){
104
sret = write(*fifo_fd_r, cmd_line + written,
96
while(not interrupted_by_signal and written < cmd_line_len){
97
sret = write(fifo_fd, cmd_line + written,
105
98
cmd_line_len - written);
106
99
if(sret == -1){
107
int e = errno;
108
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
109
free(cmd_line_alloc);
110
errno = e;
111
return false;
100
if(errno != EINTR or interrupted_by_signal){
101
int e = errno;
102
close(fifo_fd);
103
free(cmd_line_alloc);
104
errno = e;
105
return false;
106
} else {
107
continue;
108
}
112
109
}
113
110
written += (size_t)sret;
114
111
}
115
112
free(cmd_line_alloc);
116
113
do{
114
ret = close(fifo_fd);
115
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
116
return false;
117
}
118
}while(ret == -1);
119
if(interrupted_by_signal){
120
return false;
121
}
117
122
return true;
118
123
}
119
124
120
/* Create prompt string */
121
char *makeprompt(void){
122
int ret = 0;
123
char *prompt;
124
const char *const cryptsource = getenv("cryptsource");
125
const char *const crypttarget = getenv("crypttarget");
126
const char prompt_start[] = "Enter passphrase to unlock the disk";
127
128
if(cryptsource == NULL){
129
if(crypttarget == NULL){
130
ret = asprintf(&prompt, "%s: ", prompt_start);
131
} else {
132
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
133
crypttarget);
134
}
135
} else {
136
if(crypttarget == NULL){
137
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
138
} else {
139
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
140
cryptsource, crypttarget);
141
}
142
}
143
if(ret == -1){
144
return NULL;
145
}
146
return prompt;
147
}
148
149
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
150
int ret = 0;
151
ssize_t sret = 0;
152
char *cmdline = NULL;
153
size_t cmdline_len = 0;
154
DIR *proc_dir = opendir("/proc");
155
if(proc_dir == NULL){
156
perror("opendir");
157
return -1;
158
}
159
errno = 0;
160
for(struct dirent *proc_ent = readdir(proc_dir);
161
proc_ent != NULL;
162
proc_ent = readdir(proc_dir)){
163
pid_t pid;
164
{
165
intmax_t tmpmax;
166
char *tmp;
167
tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
168
if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
169
or tmpmax != (pid_t)tmpmax){
170
/* Not a process */
171
errno = 0;
172
continue;
173
}
174
pid = (pid_t)tmpmax;
175
}
176
/* Find the executable name by doing readlink() on the
177
/proc/<pid>/exe link */
178
char exe_target[sizeof(usplash_name)];
179
{
180
/* create file name string */
181
char *exe_link;
182
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
183
if(ret == -1){
184
perror("asprintf");
185
goto fail_find_usplash;
186
}
187
188
/* Check that it refers to a symlink owned by root:root */
189
struct stat exe_stat;
190
ret = lstat(exe_link, &exe_stat);
191
if(ret == -1){
192
if(errno == ENOENT){
193
free(exe_link);
194
continue;
195
}
196
perror("lstat");
197
free(exe_link);
198
goto fail_find_usplash;
199
}
200
if(not S_ISLNK(exe_stat.st_mode)
201
or exe_stat.st_uid != 0
202
or exe_stat.st_gid != 0){
203
free(exe_link);
204
continue;
205
}
206
207
sret = readlink(exe_link, exe_target, sizeof(exe_target));
208
free(exe_link);
209
}
210
/* Compare executable name */
211
if((sret != ((ssize_t)sizeof(exe_target)-1))
212
or (memcmp(usplash_name, exe_target,
213
sizeof(exe_target)-1) != 0)){
214
/* Not it */
215
continue;
216
}
217
/* Found usplash */
218
/* Read and save the command line of usplash in "cmdline" */
219
{
220
/* Open /proc/<pid>/cmdline */
221
int cl_fd;
222
{
223
char *cmdline_filename;
224
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
225
proc_ent->d_name);
226
if(ret == -1){
227
perror("asprintf");
228
goto fail_find_usplash;
229
}
230
cl_fd = open(cmdline_filename, O_RDONLY);
231
free(cmdline_filename);
232
if(cl_fd == -1){
233
perror("open");
234
goto fail_find_usplash;
235
}
236
}
237
size_t cmdline_allocated = 0;
238
char *tmp;
239
const size_t blocksize = 1024;
240
do {
241
/* Allocate more space? */
242
if(cmdline_len + blocksize > cmdline_allocated){
243
tmp = realloc(cmdline, cmdline_allocated + blocksize);
244
if(tmp == NULL){
245
perror("realloc");
246
close(cl_fd);
247
goto fail_find_usplash;
248
}
249
cmdline = tmp;
250
cmdline_allocated += blocksize;
251
}
252
/* Read data */
253
sret = read(cl_fd, cmdline + cmdline_len,
254
cmdline_allocated - cmdline_len);
255
if(sret == -1){
256
perror("read");
257
close(cl_fd);
258
goto fail_find_usplash;
259
}
260
cmdline_len += (size_t)sret;
261
} while(sret != 0);
262
ret = close(cl_fd);
263
if(ret == -1){
264
perror("close");
265
goto fail_find_usplash;
266
}
267
}
268
/* Close directory */
269
ret = closedir(proc_dir);
270
if(ret == -1){
271
perror("closedir");
272
goto fail_find_usplash;
273
}
274
/* Success */
275
*cmdline_r = cmdline;
276
*cmdline_len_r = cmdline_len;
277
return pid;
278
}
279
280
fail_find_usplash:
281
282
free(cmdline);
283
if(proc_dir != NULL){
284
int e = errno;
285
closedir(proc_dir);
286
errno = e;
287
}
288
return 0;
289
}
290
291
125
int main(__attribute__((unused))int argc,
292
126
__attribute__((unused))char **argv){
293
127
int ret = 0;
294
128
ssize_t sret;
295
int fifo_fd = -1;
296
int outfifo_fd = -1;
297
char *buf = NULL;
298
size_t buf_len = 0;
299
pid_t usplash_pid = -1;
300
bool usplash_accessed = false;
301
int status = EXIT_FAILURE; /* Default failure exit status */
129
bool an_error_occured = false;
302
130
303
char *prompt = makeprompt();
304
if(prompt == NULL){
305
status = EX_OSERR;
306
goto failure;
131
/* Create prompt string */
132
char *prompt = NULL;
133
{
134
const char *const cryptsource = getenv("cryptsource");
135
const char *const crypttarget = getenv("crypttarget");
136
const char prompt_start[] = "Enter passphrase to unlock the disk";
137
138
if(cryptsource == NULL){
139
if(crypttarget == NULL){
140
ret = asprintf(&prompt, "%s: ", prompt_start);
141
} else {
142
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
143
crypttarget);
144
}
145
} else {
146
if(crypttarget == NULL){
147
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
148
} else {
149
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
150
cryptsource, crypttarget);
151
}
152
}
153
if(ret == -1){
154
return EXIT_FAILURE;
155
}
307
156
}
308
157
309
158
/* Find usplash process */
159
pid_t usplash_pid = 0;
310
160
char *cmdline = NULL;
311
161
size_t cmdline_len = 0;
312
usplash_pid = find_usplash(&cmdline, &cmdline_len);
162
const char usplash_name[] = "/sbin/usplash";
163
{
164
DIR *proc_dir = opendir("/proc");
165
if(proc_dir == NULL){
166
free(prompt);
167
perror("opendir");
168
return EXIT_FAILURE;
169
}
170
for(struct dirent *proc_ent = readdir(proc_dir);
171
proc_ent != NULL;
172
proc_ent = readdir(proc_dir)){
173
pid_t pid;
174
{
175
intmax_t tmpmax;
176
int numchars;
177
ret = sscanf(proc_ent->d_name, "%" SCNdMAX "%n", &tmpmax,
178
&numchars);
179
if(ret < 1 or tmpmax != (pid_t)tmpmax
180
or proc_ent->d_name[numchars] != '\0'){
181
/* Not a process */
182
continue;
183
}
184
pid = (pid_t)tmpmax;
185
}
186
/* Find the executable name by doing readlink() on the
187
/proc/<pid>/exe link */
188
char exe_target[sizeof(usplash_name)];
189
{
190
/* create file name string */
191
char *exe_link;
192
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
193
if(ret == -1){
194
perror("asprintf");
195
free(prompt);
196
closedir(proc_dir);
197
return EXIT_FAILURE;
198
}
199
200
/* Check that it refers to a symlink owned by root:root */
201
struct stat exe_stat;
202
ret = lstat(exe_link, &exe_stat);
203
if(ret == -1){
204
if(errno == ENOENT){
205
free(exe_link);
206
continue;
207
}
208
perror("lstat");
209
free(exe_link);
210
free(prompt);
211
closedir(proc_dir);
212
return EXIT_FAILURE;
213
}
214
if(not S_ISLNK(exe_stat.st_mode)
215
or exe_stat.st_uid != 0
216
or exe_stat.st_gid != 0){
217
free(exe_link);
218
continue;
219
}
220
221
sret = readlink(exe_link, exe_target, sizeof(exe_target));
222
free(exe_link);
223
}
224
if((sret == ((ssize_t)sizeof(exe_target)-1))
225
and (memcmp(usplash_name, exe_target,
226
sizeof(exe_target)-1) == 0)){
227
usplash_pid = pid;
228
/* Read and save the command line of usplash in "cmdline" */
229
{
230
/* Open /proc/<pid>/cmdline */
231
int cl_fd;
232
{
233
char *cmdline_filename;
234
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
235
proc_ent->d_name);
236
if(ret == -1){
237
perror("asprintf");
238
free(prompt);
239
closedir(proc_dir);
240
return EXIT_FAILURE;
241
}
242
cl_fd = open(cmdline_filename, O_RDONLY);
243
if(cl_fd == -1){
244
perror("open");
245
free(cmdline_filename);
246
free(prompt);
247
closedir(proc_dir);
248
return EXIT_FAILURE;
249
}
250
free(cmdline_filename);
251
}
252
size_t cmdline_allocated = 0;
253
char *tmp;
254
const size_t blocksize = 1024;
255
do{
256
if(cmdline_len + blocksize > cmdline_allocated){
257
tmp = realloc(cmdline, cmdline_allocated + blocksize);
258
if(tmp == NULL){
259
perror("realloc");
260
free(cmdline);
261
free(prompt);
262
closedir(proc_dir);
263
return EXIT_FAILURE;
264
}
265
cmdline = tmp;
266
cmdline_allocated += blocksize;
267
}
268
sret = read(cl_fd, cmdline + cmdline_len,
269
cmdline_allocated - cmdline_len);
270
if(sret == -1){
271
perror("read");
272
free(cmdline);
273
free(prompt);
274
closedir(proc_dir);
275
return EXIT_FAILURE;
276
}
277
cmdline_len += (size_t)sret;
278
} while(sret != 0);
279
close(cl_fd);
280
}
281
break;
282
}
283
}
284
closedir(proc_dir);
285
}
313
286
if(usplash_pid == 0){
314
status = EX_UNAVAILABLE;
315
goto failure;
287
free(prompt);
288
return EXIT_FAILURE;
316
289
}
317
290
318
291
/* Set up the signal handler */
321
294
new_action = { .sa_handler = termination_handler,
322
295
.sa_flags = 0 };
323
296
sigemptyset(&new_action.sa_mask);
324
ret = sigaddset(&new_action.sa_mask, SIGINT);
325
if(ret == -1){
326
perror("sigaddset");
327
status = EX_OSERR;
328
goto failure;
329
}
330
ret = sigaddset(&new_action.sa_mask, SIGHUP);
331
if(ret == -1){
332
perror("sigaddset");
333
status = EX_OSERR;
334
goto failure;
335
}
336
ret = sigaddset(&new_action.sa_mask, SIGTERM);
337
if(ret == -1){
338
perror("sigaddset");
339
status = EX_OSERR;
340
goto failure;
341
}
297
sigaddset(&new_action.sa_mask, SIGINT);
298
sigaddset(&new_action.sa_mask, SIGHUP);
299
sigaddset(&new_action.sa_mask, SIGTERM);
342
300
ret = sigaction(SIGINT, NULL, &old_action);
343
301
if(ret == -1){
344
if(errno != EINTR){
345
perror("sigaction");
346
status = EX_OSERR;
347
}
348
goto failure;
302
perror("sigaction");
303
free(prompt);
304
return EXIT_FAILURE;
349
305
}
350
306
if(old_action.sa_handler != SIG_IGN){
351
307
ret = sigaction(SIGINT, &new_action, NULL);
352
308
if(ret == -1){
353
if(errno != EINTR){
354
perror("sigaction");
355
status = EX_OSERR;
356
}
357
goto failure;
309
perror("sigaction");
310
free(prompt);
311
return EXIT_FAILURE;
358
312
}
359
313
}
360
314
ret = sigaction(SIGHUP, NULL, &old_action);
361
315
if(ret == -1){
362
if(errno != EINTR){
363
perror("sigaction");
364
status = EX_OSERR;
365
}
366
goto failure;
316
perror("sigaction");
317
free(prompt);
318
return EXIT_FAILURE;
367
319
}
368
320
if(old_action.sa_handler != SIG_IGN){
369
321
ret = sigaction(SIGHUP, &new_action, NULL);
370
322
if(ret == -1){
371
if(errno != EINTR){
372
perror("sigaction");
373
status = EX_OSERR;
374
}
375
goto failure;
323
perror("sigaction");
324
free(prompt);
325
return EXIT_FAILURE;
376
326
}
377
327
}
378
328
ret = sigaction(SIGTERM, NULL, &old_action);
379
329
if(ret == -1){
380
if(errno != EINTR){
381
perror("sigaction");
382
status = EX_OSERR;
383
}
384
goto failure;
330
perror("sigaction");
331
free(prompt);
332
return EXIT_FAILURE;
385
333
}
386
334
if(old_action.sa_handler != SIG_IGN){
387
335
ret = sigaction(SIGTERM, &new_action, NULL);
388
336
if(ret == -1){
389
if(errno != EINTR){
390
perror("sigaction");
391
status = EX_OSERR;
392
}
393
goto failure;
337
perror("sigaction");
338
free(prompt);
339
return EXIT_FAILURE;
394
340
}
395
341
}
396
342
}
397
343
398
usplash_accessed = true;
399
344
/* Write command to FIFO */
400
if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
401
if(errno != EINTR){
402
perror("usplash_write");
403
status = EX_OSERR;
404
}
405
goto failure;
406
}
407
408
if(interrupted_by_signal){
409
goto failure;
410
}
411
412
if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
413
if(errno != EINTR){
414
perror("usplash_write");
415
status = EX_OSERR;
416
}
417
goto failure;
418
}
419
420
if(interrupted_by_signal){
421
goto failure;
422
}
423
345
if(not interrupted_by_signal){
346
if(not usplash_write("TIMEOUT", "0")
347
and (errno != EINTR)){
348
perror("usplash_write");
349
an_error_occured = true;
350
}
351
}
352
if(not interrupted_by_signal and not an_error_occured){
353
if(not usplash_write("INPUTQUIET", prompt)
354
and (errno != EINTR)){
355
perror("usplash_write");
356
an_error_occured = true;
357
}
358
}
424
359
free(prompt);
425
prompt = NULL;
426
427
/* Read reply from usplash */
428
/* Open FIFO */
429
outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
430
if(outfifo_fd == -1){
431
if(errno != EINTR){
432
perror("open");
433
status = EX_OSERR;
434
}
435
goto failure;
436
}
437
438
if(interrupted_by_signal){
439
goto failure;
440
}
441
442
/* Read from FIFO */
443
size_t buf_allocated = 0;
444
const size_t blocksize = 1024;
445
do {
446
/* Allocate more space */
447
if(buf_len + blocksize > buf_allocated){
448
char *tmp = realloc(buf, buf_allocated + blocksize);
449
if(tmp == NULL){
360
361
/* This is not really a loop; while() is used to be able to "break"
362
out of it; those breaks are marked "Big" */
363
while(not interrupted_by_signal and not an_error_occured){
364
char *buf = NULL;
365
size_t buf_len = 0;
366
367
/* Open FIFO */
368
int fifo_fd;
369
do{
370
fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
371
if(fifo_fd == -1){
450
372
if(errno != EINTR){
373
perror("open");
374
an_error_occured = true;
375
break;
376
}
377
if(interrupted_by_signal){
378
break;
379
}
380
}
381
}while(fifo_fd == -1);
382
if(interrupted_by_signal or an_error_occured){
383
break; /* Big */
384
}
385
386
/* Read from FIFO */
387
size_t buf_allocated = 0;
388
const size_t blocksize = 1024;
389
do{
390
if(buf_len + blocksize > buf_allocated){
391
char *tmp = realloc(buf, buf_allocated + blocksize);
392
if(tmp == NULL){
451
393
perror("realloc");
452
status = EX_OSERR;
453
}
454
goto failure;
455
}
456
buf = tmp;
457
buf_allocated += blocksize;
458
}
459
sret = read(outfifo_fd, buf + buf_len,
460
buf_allocated - buf_len);
461
if(sret == -1){
462
if(errno != EINTR){
463
perror("read");
464
status = EX_OSERR;
465
}
466
TEMP_FAILURE_RETRY(close(outfifo_fd));
467
goto failure;
468
}
469
if(interrupted_by_signal){
470
break;
471
}
472
473
buf_len += (size_t)sret;
474
} while(sret != 0);
475
ret = close(outfifo_fd);
476
if(ret == -1){
477
if(errno != EINTR){
478
perror("close");
479
status = EX_OSERR;
480
}
481
goto failure;
482
}
483
outfifo_fd = -1;
484
485
if(interrupted_by_signal){
486
goto failure;
487
}
488
489
if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
490
if(errno != EINTR){
491
perror("usplash_write");
492
status = EX_OSERR;
493
}
494
goto failure;
495
}
496
497
if(interrupted_by_signal){
498
goto failure;
499
}
500
501
ret = close(fifo_fd);
502
if(ret == -1){
503
if(errno != EINTR){
504
perror("close");
505
status = EX_OSERR;
506
}
507
goto failure;
508
}
509
fifo_fd = -1;
510
511
/* Print password to stdout */
512
size_t written = 0;
513
while(written < buf_len){
514
do {
515
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
516
if(sret == -1){
517
if(errno != EINTR){
518
perror("write");
519
status = EX_OSERR;
520
}
521
goto failure;
522
}
523
} while(sret == -1);
524
525
if(interrupted_by_signal){
526
goto failure;
527
}
528
written += (size_t)sret;
529
}
530
free(buf);
531
buf = NULL;
532
533
if(interrupted_by_signal){
534
goto failure;
535
}
536
537
free(cmdline);
538
return EXIT_SUCCESS;
539
540
failure:
541
542
free(buf);
543
544
free(prompt);
545
546
/* If usplash was never accessed, we can stop now */
547
if(not usplash_accessed){
548
return status;
549
}
550
551
/* Close FIFO */
552
if(fifo_fd != -1){
553
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
554
if(ret == -1 and errno != EINTR){
555
perror("close");
556
}
557
fifo_fd = -1;
558
}
559
560
/* Close output FIFO */
561
if(outfifo_fd != -1){
562
ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
563
if(ret == -1){
564
perror("close");
565
}
566
}
394
an_error_occured = true;
395
break;
396
}
397
buf = tmp;
398
buf_allocated += blocksize;
399
}
400
do{
401
sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
402
if(sret == -1){
403
if(errno != EINTR){
404
perror("read");
405
an_error_occured = true;
406
break;
407
}
408
if(interrupted_by_signal){
409
break;
410
}
411
}
412
}while(sret == -1);
413
if(interrupted_by_signal or an_error_occured){
414
break;
415
}
416
417
buf_len += (size_t)sret;
418
}while(sret != 0);
419
close(fifo_fd);
420
if(interrupted_by_signal or an_error_occured){
421
break; /* Big */
422
}
423
424
if(not usplash_write("TIMEOUT", "15")
425
and (errno != EINTR)){
426
perror("usplash_write");
427
an_error_occured = true;
428
}
429
if(interrupted_by_signal or an_error_occured){
430
break; /* Big */
431
}
432
433
/* Print password to stdout */
434
size_t written = 0;
435
while(written < buf_len){
436
do{
437
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
438
if(sret == -1){
439
if(errno != EINTR){
440
perror("write");
441
an_error_occured = true;
442
break;
443
}
444
if(interrupted_by_signal){
445
break;
446
}
447
}
448
}while(sret == -1);
449
if(interrupted_by_signal or an_error_occured){
450
break;
451
}
452
written += (size_t)sret;
453
}
454
free(buf);
455
if(not interrupted_by_signal and not an_error_occured){
456
free(cmdline);
457
return EXIT_SUCCESS;
458
}
459
break; /* Big */
460
} /* end of non-loop while() */
461
462
/* If we got here, an error or interrupt must have happened */
567
463
568
464
/* Create argc and argv for new usplash*/
569
465
int cmdline_argc = 0;
577
473
if(tmp == NULL){
578
474
perror("realloc");
579
475
free(cmdline_argv);
580
return status;
476
return EXIT_FAILURE;
581
477
}
582
478
cmdline_argv = tmp;
583
479
cmdline_argv[cmdline_argc] = cmdline + position;
593
489
kill(usplash_pid, SIGKILL);
594
490
sleep(1);
595
491
}
596
597
492
pid_t new_usplash_pid = fork();
598
493
if(new_usplash_pid == 0){
599
494
/* Child; will become new usplash process */
607
502
608
503
setsid();
609
504
ret = chdir("/");
610
if(ret == -1){
611
perror("chdir");
612
_exit(EX_OSERR);
613
}
614
505
/* if(fork() != 0){ */
615
506
/* _exit(EXIT_SUCCESS); */
616
507
/* } */
617
508
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
618
509
if(ret == -1){
619
510
perror("dup2");
620
_exit(EX_OSERR);
511
_exit(EXIT_FAILURE);
621
512
}
622
513
623
514
execv(usplash_name, cmdline_argv);
626
517
}
627
518
free(cmdline);
628
519
free(cmdline_argv);
629
_exit(EX_OSERR);
520
_exit(EXIT_FAILURE);
630
521
}
631
522
free(cmdline);
632
523
free(cmdline_argv);
633
524
sleep(2);
634
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
635
if(errno != EINTR){
636
perror("usplash_write");
637
}
638
}
639
640
/* Close FIFO (again) */
641
if(fifo_fd != -1){
642
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
643
if(ret == -1 and errno != EINTR){
644
perror("close");
645
}
646
fifo_fd = -1;
647
}
648
649
if(interrupted_by_signal){
650
struct sigaction signal_action = { .sa_handler = SIG_DFL };
651
sigemptyset(&signal_action.sa_mask);
652
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
653
&signal_action, NULL));
654
if(ret == -1){
655
perror("sigaction");
656
}
657
do {
658
ret = raise(signal_received);
659
} while(ret != 0 and errno == EINTR);
660
if(ret != 0){
661
perror("raise");
662
abort();
663
}
664
TEMP_FAILURE_RETRY(pause());
665
}
666
667
return status;
525
if(not usplash_write("PULSATE", NULL)
526
and (errno != EINTR)){
527
perror("usplash_write");
528
}
529
530
return EXIT_FAILURE;
668
531
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0