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- Committer: Teddy Hogeborn
- Date: 2009-11-09 07:35:16 UTC
- Revision ID: teddy@fukt.bsnet.se-20091109073516-v1vem352uz0vuwrd
* dbus-mandos.conf: New; to be copied to
"/etc/dbus-1/system.d/mandos.conf".
"/etc/dbus-1/system.d/mandos.conf".
- files added:
- dbus-mandos.conf
- files modified:
- Makefile
added
removed
plugins.d/usplash.c
22
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
23
*/
24
24
25
#define _GNU_SOURCE /* asprintf() */
25
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
26
26
#include <signal.h> /* sig_atomic_t, struct sigaction,
27
27
sigemptyset(), sigaddset(), SIGINT,
28
28
SIGHUP, SIGTERM, sigaction(),
47
47
#include <dirent.h> /* opendir(), readdir(), closedir() */
48
48
#include <inttypes.h> /* intmax_t, strtoimax() */
49
49
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
50
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
50
51
51
52
sig_atomic_t interrupted_by_signal = 0;
53
int signal_received;
54
const char usplash_name[] = "/sbin/usplash";
52
55
53
static void termination_handler(__attribute__((unused))int signum){
56
static void termination_handler(int signum){
57
if(interrupted_by_signal){
58
return;
59
}
54
60
interrupted_by_signal = 1;
61
signal_received = signum;
55
62
}
56
63
57
static bool usplash_write(const char *cmd, const char *arg){
64
static bool usplash_write(int *fifo_fd_r,
65
const char *cmd, const char *arg){
58
66
/*
59
* usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
60
* usplash_write("PULSATE", NULL) will write "PULSATE\0"
67
* usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
68
* usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
61
69
* SEE ALSO
62
70
* usplash_write(8)
63
71
*/
64
72
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)){
73
if(*fifo_fd_r == -1){
74
ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
75
if(ret == -1){
69
76
return false;
70
77
}
71
} while(fifo_fd == -1);
78
*fifo_fd_r = ret;
79
}
72
80
73
81
const char *cmd_line;
74
82
size_t cmd_line_len;
75
83
char *cmd_line_alloc = NULL;
76
84
if(arg == NULL){
77
85
cmd_line = cmd;
78
cmd_line_len = strlen(cmd);
86
cmd_line_len = strlen(cmd) + 1;
79
87
} else {
80
88
do {
81
89
ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
82
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
90
if(ret == -1){
83
91
int e = errno;
84
close(fifo_fd);
92
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
85
93
errno = e;
86
94
return false;
87
95
}
92
100
93
101
size_t written = 0;
94
102
ssize_t sret = 0;
95
while(not interrupted_by_signal and written < cmd_line_len){
96
sret = write(fifo_fd, cmd_line + written,
103
while(written < cmd_line_len){
104
sret = write(*fifo_fd_r, cmd_line + written,
97
105
cmd_line_len - written);
98
106
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
}
107
int e = errno;
108
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
109
free(cmd_line_alloc);
110
errno = e;
111
return false;
108
112
}
109
113
written += (size_t)sret;
110
114
}
111
115
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
}
116
121
117
return true;
122
118
}
123
119
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
124
291
int main(__attribute__((unused))int argc,
125
292
__attribute__((unused))char **argv){
126
293
int ret = 0;
127
294
ssize_t sret;
128
bool an_error_occured = false;
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
302
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
}
303
char *prompt = makeprompt();
304
if(prompt == NULL){
305
status = EX_OSERR;
306
goto failure;
155
307
}
156
308
157
309
/* Find usplash process */
158
pid_t usplash_pid = 0;
159
310
char *cmdline = NULL;
160
311
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
}
312
usplash_pid = find_usplash(&cmdline, &cmdline_len);
285
313
if(usplash_pid == 0){
286
free(prompt);
287
return EXIT_FAILURE;
314
status = EX_UNAVAILABLE;
315
goto failure;
288
316
}
289
317
290
318
/* Set up the signal handler */
293
321
new_action = { .sa_handler = termination_handler,
294
322
.sa_flags = 0 };
295
323
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);
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
}
299
342
ret = sigaction(SIGINT, NULL, &old_action);
300
343
if(ret == -1){
301
perror("sigaction");
302
free(prompt);
303
return EXIT_FAILURE;
344
if(errno != EINTR){
345
perror("sigaction");
346
status = EX_OSERR;
347
}
348
goto failure;
304
349
}
305
350
if(old_action.sa_handler != SIG_IGN){
306
351
ret = sigaction(SIGINT, &new_action, NULL);
307
352
if(ret == -1){
308
perror("sigaction");
309
free(prompt);
310
return EXIT_FAILURE;
353
if(errno != EINTR){
354
perror("sigaction");
355
status = EX_OSERR;
356
}
357
goto failure;
311
358
}
312
359
}
313
360
ret = sigaction(SIGHUP, NULL, &old_action);
314
361
if(ret == -1){
315
perror("sigaction");
316
free(prompt);
317
return EXIT_FAILURE;
362
if(errno != EINTR){
363
perror("sigaction");
364
status = EX_OSERR;
365
}
366
goto failure;
318
367
}
319
368
if(old_action.sa_handler != SIG_IGN){
320
369
ret = sigaction(SIGHUP, &new_action, NULL);
321
370
if(ret == -1){
322
perror("sigaction");
323
free(prompt);
324
return EXIT_FAILURE;
371
if(errno != EINTR){
372
perror("sigaction");
373
status = EX_OSERR;
374
}
375
goto failure;
325
376
}
326
377
}
327
378
ret = sigaction(SIGTERM, NULL, &old_action);
328
379
if(ret == -1){
329
perror("sigaction");
330
free(prompt);
331
return EXIT_FAILURE;
380
if(errno != EINTR){
381
perror("sigaction");
382
status = EX_OSERR;
383
}
384
goto failure;
332
385
}
333
386
if(old_action.sa_handler != SIG_IGN){
334
387
ret = sigaction(SIGTERM, &new_action, NULL);
335
388
if(ret == -1){
336
perror("sigaction");
337
free(prompt);
338
return EXIT_FAILURE;
389
if(errno != EINTR){
390
perror("sigaction");
391
status = EX_OSERR;
392
}
393
goto failure;
339
394
}
340
395
}
341
396
}
342
397
398
usplash_accessed = true;
343
399
/* 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
}
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
358
424
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){
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){
371
450
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
451
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 */
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
}
462
567
463
568
/* Create argc and argv for new usplash*/
464
569
int cmdline_argc = 0;
472
577
if(tmp == NULL){
473
578
perror("realloc");
474
579
free(cmdline_argv);
475
return EXIT_FAILURE;
580
return status;
476
581
}
477
582
cmdline_argv = tmp;
478
583
cmdline_argv[cmdline_argc] = cmdline + position;
488
593
kill(usplash_pid, SIGKILL);
489
594
sleep(1);
490
595
}
596
491
597
pid_t new_usplash_pid = fork();
492
598
if(new_usplash_pid == 0){
493
599
/* Child; will become new usplash process */
507
613
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
508
614
if(ret == -1){
509
615
perror("dup2");
510
_exit(EXIT_FAILURE);
616
_exit(EX_OSERR);
511
617
}
512
618
513
619
execv(usplash_name, cmdline_argv);
516
622
}
517
623
free(cmdline);
518
624
free(cmdline_argv);
519
_exit(EXIT_FAILURE);
625
_exit(EX_OSERR);
520
626
}
521
627
free(cmdline);
522
628
free(cmdline_argv);
523
629
sleep(2);
524
if(not usplash_write("PULSATE", NULL)
525
and (errno != EINTR)){
526
perror("usplash_write");
527
}
528
529
return EXIT_FAILURE;
630
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
631
if(errno != EINTR){
632
perror("usplash_write");
633
}
634
}
635
636
/* Close FIFO (again) */
637
if(fifo_fd != -1){
638
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
639
if(ret == -1 and errno != EINTR){
640
perror("close");
641
}
642
fifo_fd = -1;
643
}
644
645
if(interrupted_by_signal){
646
struct sigaction signal_action = { .sa_handler = SIG_DFL };
647
sigemptyset(&signal_action.sa_mask);
648
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
649
&signal_action, NULL));
650
if(ret == -1){
651
perror("sigaction");
652
}
653
do {
654
ret = raise(signal_received);
655
} while(ret != 0 and errno == EINTR);
656
if(ret != 0){
657
perror("raise");
658
abort();
659
}
660
TEMP_FAILURE_RETRY(pause());
661
}
662
663
return status;
530
664
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0