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- Committer: Teddy Hogeborn
- Date: 2015-01-25 00:02:51 UTC
- Revision ID: teddy@recompile.se-20150125000251-j2bw50gfq9smqyxe
mandos.xml (SEE ALSO): Update links.
Update link to GnuPG home page, change reference from TLS 1.1 to TLS
1.2, and change to latest RFC for using OpenPGP keys with TLS (and use
its correct title).
Update link to GnuPG home page, change reference from TLS 1.1 to TLS
1.2, and change to latest RFC for using OpenPGP keys with TLS (and use
its correct title).
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- 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
5
* Copyright © 2008-2014 Teddy Hogeborn
6
* Copyright © 2008-2014 Björn Påhlsson
7
7
*
8
8
* This program is free software: you can redistribute it and/or
9
9
* modify it under the terms of the GNU General Public License as
19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
21
21
*
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
22
* Contact the authors at <mandos@recompile.se>.
24
23
*/
25
24
26
#define _GNU_SOURCE /* asprintf() */
25
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
27
26
#include <signal.h> /* sig_atomic_t, struct sigaction,
28
27
sigemptyset(), sigaddset(), SIGINT,
29
28
SIGHUP, SIGTERM, sigaction(),
32
31
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
33
32
#include <iso646.h> /* and, or, not*/
34
33
#include <errno.h> /* errno, EINTR */
34
#include <error.h>
35
35
#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR, struct
36
36
dirent */
37
37
#include <stddef.h> /* NULL */
38
#include <string.h> /* strlen(), memcmp() */
39
#include <stdio.h> /* asprintf(), perror(), sscanf() */
38
#include <string.h> /* strlen(), memcmp(), strerror() */
39
#include <stdio.h> /* asprintf(), vasprintf(), vprintf(),
40
fprintf() */
40
41
#include <unistd.h> /* close(), write(), readlink(),
41
42
read(), STDOUT_FILENO, sleep(),
42
43
fork(), setuid(), geteuid(),
43
44
setsid(), chdir(), dup2(),
44
45
STDERR_FILENO, execv() */
45
46
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
46
EXIT_SUCCESS, malloc(), _exit() */
47
#include <stdlib.h> /* getenv() */
47
EXIT_SUCCESS, malloc(), _exit(),
48
getenv() */
48
49
#include <dirent.h> /* opendir(), readdir(), closedir() */
49
#include <inttypes.h> /* intmax_t, SCNdMAX */
50
#include <inttypes.h> /* intmax_t, strtoimax() */
50
51
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
52
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
53
#include <argz.h> /* argz_count(), argz_extract() */
54
#include <stdarg.h> /* va_list, va_start(), ... */
51
55
52
56
sig_atomic_t interrupted_by_signal = 0;
53
54
static void termination_handler(__attribute__((unused))int signum){
57
int signal_received;
58
const char usplash_name[] = "/sbin/usplash";
59
60
/* Function to use when printing errors */
61
__attribute__((format (gnu_printf, 3, 4)))
62
void error_plus(int status, int errnum, const char *formatstring,
63
...){
64
va_list ap;
65
char *text;
66
int ret;
67
68
va_start(ap, formatstring);
69
ret = vasprintf(&text, formatstring, ap);
70
if(ret == -1){
71
fprintf(stderr, "Mandos plugin %s: ",
72
program_invocation_short_name);
73
vfprintf(stderr, formatstring, ap);
74
fprintf(stderr, ": ");
75
fprintf(stderr, "%s\n", strerror(errnum));
76
error(status, errno, "vasprintf while printing error");
77
return;
78
}
79
fprintf(stderr, "Mandos plugin ");
80
error(status, errnum, "%s", text);
81
free(text);
82
}
83
84
static void termination_handler(int signum){
85
if(interrupted_by_signal){
86
return;
87
}
55
88
interrupted_by_signal = 1;
89
signal_received = signum;
56
90
}
57
91
58
static bool usplash_write(const char *cmd, const char *arg){
92
static bool usplash_write(int *fifo_fd_r,
93
const char *cmd, const char *arg){
59
94
/*
60
* usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
61
* usplash_write("PULSATE", NULL) will write "PULSATE\0"
95
* usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
96
* usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
62
97
* SEE ALSO
63
98
* usplash_write(8)
64
99
*/
65
100
int ret;
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)){
101
if(*fifo_fd_r == -1){
102
ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
103
if(ret == -1){
70
104
return false;
71
105
}
72
}while(fifo_fd == -1);
106
*fifo_fd_r = ret;
107
}
73
108
74
109
const char *cmd_line;
75
110
size_t cmd_line_len;
76
111
char *cmd_line_alloc = NULL;
77
112
if(arg == NULL){
78
113
cmd_line = cmd;
79
cmd_line_len = strlen(cmd);
80
}else{
81
do{
114
cmd_line_len = strlen(cmd) + 1;
115
} else {
116
do {
82
117
ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
83
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
118
if(ret == -1){
84
119
int e = errno;
85
close(fifo_fd);
120
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
86
121
errno = e;
87
122
return false;
88
123
}
89
}while(ret == -1);
124
} while(ret == -1);
90
125
cmd_line = cmd_line_alloc;
91
126
cmd_line_len = (size_t)ret + 1;
92
127
}
93
128
94
129
size_t written = 0;
95
130
ssize_t sret = 0;
96
while(not interrupted_by_signal and written < cmd_line_len){
97
sret = write(fifo_fd, cmd_line + written,
131
while(written < cmd_line_len){
132
sret = write(*fifo_fd_r, cmd_line + written,
98
133
cmd_line_len - written);
99
134
if(sret == -1){
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
}
135
int e = errno;
136
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
137
free(cmd_line_alloc);
138
errno = e;
139
return false;
109
140
}
110
141
written += (size_t)sret;
111
142
}
112
143
free(cmd_line_alloc);
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
}
144
122
145
return true;
123
146
}
124
147
148
/* Create prompt string */
149
char *makeprompt(void){
150
int ret = 0;
151
char *prompt;
152
const char *const cryptsource = getenv("cryptsource");
153
const char *const crypttarget = getenv("crypttarget");
154
const char prompt_start[] = "Enter passphrase to unlock the disk";
155
156
if(cryptsource == NULL){
157
if(crypttarget == NULL){
158
ret = asprintf(&prompt, "%s: ", prompt_start);
159
} else {
160
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
161
crypttarget);
162
}
163
} else {
164
if(crypttarget == NULL){
165
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
166
} else {
167
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
168
cryptsource, crypttarget);
169
}
170
}
171
if(ret == -1){
172
return NULL;
173
}
174
return prompt;
175
}
176
177
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
178
int ret = 0;
179
ssize_t sret = 0;
180
char *cmdline = NULL;
181
size_t cmdline_len = 0;
182
DIR *proc_dir = opendir("/proc");
183
if(proc_dir == NULL){
184
error_plus(0, errno, "opendir");
185
return -1;
186
}
187
errno = 0;
188
for(struct dirent *proc_ent = readdir(proc_dir);
189
proc_ent != NULL;
190
proc_ent = readdir(proc_dir)){
191
pid_t pid;
192
{
193
intmax_t tmpmax;
194
char *tmp;
195
tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
196
if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
197
or tmpmax != (pid_t)tmpmax){
198
/* Not a process */
199
errno = 0;
200
continue;
201
}
202
pid = (pid_t)tmpmax;
203
}
204
/* Find the executable name by doing readlink() on the
205
/proc/<pid>/exe link */
206
char exe_target[sizeof(usplash_name)];
207
{
208
/* create file name string */
209
char *exe_link;
210
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
211
if(ret == -1){
212
error_plus(0, errno, "asprintf");
213
goto fail_find_usplash;
214
}
215
216
/* Check that it refers to a symlink owned by root:root */
217
struct stat exe_stat;
218
ret = lstat(exe_link, &exe_stat);
219
if(ret == -1){
220
if(errno == ENOENT){
221
free(exe_link);
222
continue;
223
}
224
error_plus(0, errno, "lstat");
225
free(exe_link);
226
goto fail_find_usplash;
227
}
228
if(not S_ISLNK(exe_stat.st_mode)
229
or exe_stat.st_uid != 0
230
or exe_stat.st_gid != 0){
231
free(exe_link);
232
continue;
233
}
234
235
sret = readlink(exe_link, exe_target, sizeof(exe_target));
236
free(exe_link);
237
}
238
/* Compare executable name */
239
if((sret != ((ssize_t)sizeof(exe_target)-1))
240
or (memcmp(usplash_name, exe_target,
241
sizeof(exe_target)-1) != 0)){
242
/* Not it */
243
continue;
244
}
245
/* Found usplash */
246
/* Read and save the command line of usplash in "cmdline" */
247
{
248
/* Open /proc/<pid>/cmdline */
249
int cl_fd;
250
{
251
char *cmdline_filename;
252
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
253
proc_ent->d_name);
254
if(ret == -1){
255
error_plus(0, errno, "asprintf");
256
goto fail_find_usplash;
257
}
258
cl_fd = open(cmdline_filename, O_RDONLY);
259
free(cmdline_filename);
260
if(cl_fd == -1){
261
error_plus(0, errno, "open");
262
goto fail_find_usplash;
263
}
264
}
265
size_t cmdline_allocated = 0;
266
char *tmp;
267
const size_t blocksize = 1024;
268
do {
269
/* Allocate more space? */
270
if(cmdline_len + blocksize > cmdline_allocated){
271
tmp = realloc(cmdline, cmdline_allocated + blocksize);
272
if(tmp == NULL){
273
error_plus(0, errno, "realloc");
274
close(cl_fd);
275
goto fail_find_usplash;
276
}
277
cmdline = tmp;
278
cmdline_allocated += blocksize;
279
}
280
/* Read data */
281
sret = read(cl_fd, cmdline + cmdline_len,
282
cmdline_allocated - cmdline_len);
283
if(sret == -1){
284
error_plus(0, errno, "read");
285
close(cl_fd);
286
goto fail_find_usplash;
287
}
288
cmdline_len += (size_t)sret;
289
} while(sret != 0);
290
ret = close(cl_fd);
291
if(ret == -1){
292
error_plus(0, errno, "close");
293
goto fail_find_usplash;
294
}
295
}
296
/* Close directory */
297
ret = closedir(proc_dir);
298
if(ret == -1){
299
error_plus(0, errno, "closedir");
300
goto fail_find_usplash;
301
}
302
/* Success */
303
*cmdline_r = cmdline;
304
*cmdline_len_r = cmdline_len;
305
return pid;
306
}
307
308
fail_find_usplash:
309
310
free(cmdline);
311
if(proc_dir != NULL){
312
int e = errno;
313
closedir(proc_dir);
314
errno = e;
315
}
316
return 0;
317
}
318
125
319
int main(__attribute__((unused))int argc,
126
320
__attribute__((unused))char **argv){
127
321
int ret = 0;
128
322
ssize_t sret;
129
bool an_error_occured = false;
323
int fifo_fd = -1;
324
int outfifo_fd = -1;
325
char *buf = NULL;
326
size_t buf_len = 0;
327
pid_t usplash_pid = -1;
328
bool usplash_accessed = false;
329
int status = EXIT_FAILURE; /* Default failure exit status */
130
330
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
}
331
char *prompt = makeprompt();
332
if(prompt == NULL){
333
status = EX_OSERR;
334
goto failure;
156
335
}
157
336
158
337
/* Find usplash process */
159
pid_t usplash_pid = 0;
160
338
char *cmdline = NULL;
161
339
size_t cmdline_len = 0;
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
}
340
usplash_pid = find_usplash(&cmdline, &cmdline_len);
286
341
if(usplash_pid == 0){
287
free(prompt);
288
return EXIT_FAILURE;
342
status = EX_UNAVAILABLE;
343
goto failure;
289
344
}
290
345
291
346
/* Set up the signal handler */
294
349
new_action = { .sa_handler = termination_handler,
295
350
.sa_flags = 0 };
296
351
sigemptyset(&new_action.sa_mask);
297
sigaddset(&new_action.sa_mask, SIGINT);
298
sigaddset(&new_action.sa_mask, SIGHUP);
299
sigaddset(&new_action.sa_mask, SIGTERM);
352
ret = sigaddset(&new_action.sa_mask, SIGINT);
353
if(ret == -1){
354
error_plus(0, errno, "sigaddset");
355
status = EX_OSERR;
356
goto failure;
357
}
358
ret = sigaddset(&new_action.sa_mask, SIGHUP);
359
if(ret == -1){
360
error_plus(0, errno, "sigaddset");
361
status = EX_OSERR;
362
goto failure;
363
}
364
ret = sigaddset(&new_action.sa_mask, SIGTERM);
365
if(ret == -1){
366
error_plus(0, errno, "sigaddset");
367
status = EX_OSERR;
368
goto failure;
369
}
300
370
ret = sigaction(SIGINT, NULL, &old_action);
301
371
if(ret == -1){
302
perror("sigaction");
303
free(prompt);
304
return EXIT_FAILURE;
372
if(errno != EINTR){
373
error_plus(0, errno, "sigaction");
374
status = EX_OSERR;
375
}
376
goto failure;
305
377
}
306
378
if(old_action.sa_handler != SIG_IGN){
307
379
ret = sigaction(SIGINT, &new_action, NULL);
308
380
if(ret == -1){
309
perror("sigaction");
310
free(prompt);
311
return EXIT_FAILURE;
381
if(errno != EINTR){
382
error_plus(0, errno, "sigaction");
383
status = EX_OSERR;
384
}
385
goto failure;
312
386
}
313
387
}
314
388
ret = sigaction(SIGHUP, NULL, &old_action);
315
389
if(ret == -1){
316
perror("sigaction");
317
free(prompt);
318
return EXIT_FAILURE;
390
if(errno != EINTR){
391
error_plus(0, errno, "sigaction");
392
status = EX_OSERR;
393
}
394
goto failure;
319
395
}
320
396
if(old_action.sa_handler != SIG_IGN){
321
397
ret = sigaction(SIGHUP, &new_action, NULL);
322
398
if(ret == -1){
323
perror("sigaction");
324
free(prompt);
325
return EXIT_FAILURE;
399
if(errno != EINTR){
400
error_plus(0, errno, "sigaction");
401
status = EX_OSERR;
402
}
403
goto failure;
326
404
}
327
405
}
328
406
ret = sigaction(SIGTERM, NULL, &old_action);
329
407
if(ret == -1){
330
perror("sigaction");
331
free(prompt);
332
return EXIT_FAILURE;
408
if(errno != EINTR){
409
error_plus(0, errno, "sigaction");
410
status = EX_OSERR;
411
}
412
goto failure;
333
413
}
334
414
if(old_action.sa_handler != SIG_IGN){
335
415
ret = sigaction(SIGTERM, &new_action, NULL);
336
416
if(ret == -1){
337
perror("sigaction");
338
free(prompt);
339
return EXIT_FAILURE;
417
if(errno != EINTR){
418
error_plus(0, errno, "sigaction");
419
status = EX_OSERR;
420
}
421
goto failure;
340
422
}
341
423
}
342
424
}
343
425
426
usplash_accessed = true;
344
427
/* Write command to FIFO */
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
}
428
if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
429
if(errno != EINTR){
430
error_plus(0, errno, "usplash_write");
431
status = EX_OSERR;
432
}
433
goto failure;
434
}
435
436
if(interrupted_by_signal){
437
goto failure;
438
}
439
440
if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
441
if(errno != EINTR){
442
error_plus(0, errno, "usplash_write");
443
status = EX_OSERR;
444
}
445
goto failure;
446
}
447
448
if(interrupted_by_signal){
449
goto failure;
450
}
451
359
452
free(prompt);
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){
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){
393
perror("realloc");
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 */
463
464
/* Create argc and argv for new usplash*/
465
int cmdline_argc = 0;
466
char **cmdline_argv = malloc(sizeof(char *));
467
{
468
size_t position = 0;
469
while(position < cmdline_len){
470
char **tmp = realloc(cmdline_argv,
471
(sizeof(char *)
472
* (size_t)(cmdline_argc + 2)));
453
prompt = NULL;
454
455
/* Read reply from usplash */
456
/* Open FIFO */
457
outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
458
if(outfifo_fd == -1){
459
if(errno != EINTR){
460
error_plus(0, errno, "open");
461
status = EX_OSERR;
462
}
463
goto failure;
464
}
465
466
if(interrupted_by_signal){
467
goto failure;
468
}
469
470
/* Read from FIFO */
471
size_t buf_allocated = 0;
472
const size_t blocksize = 1024;
473
do {
474
/* Allocate more space */
475
if(buf_len + blocksize > buf_allocated){
476
char *tmp = realloc(buf, buf_allocated + blocksize);
473
477
if(tmp == NULL){
474
perror("realloc");
475
free(cmdline_argv);
476
return EXIT_FAILURE;
477
}
478
cmdline_argv = tmp;
479
cmdline_argv[cmdline_argc] = cmdline + position;
480
cmdline_argc++;
481
position += strlen(cmdline + position) + 1;
482
}
483
cmdline_argv[cmdline_argc] = NULL;
484
}
478
if(errno != EINTR){
479
error_plus(0, errno, "realloc");
480
status = EX_OSERR;
481
}
482
goto failure;
483
}
484
buf = tmp;
485
buf_allocated += blocksize;
486
}
487
sret = read(outfifo_fd, buf + buf_len,
488
buf_allocated - buf_len);
489
if(sret == -1){
490
if(errno != EINTR){
491
error_plus(0, errno, "read");
492
status = EX_OSERR;
493
}
494
TEMP_FAILURE_RETRY(close(outfifo_fd));
495
goto failure;
496
}
497
if(interrupted_by_signal){
498
break;
499
}
500
501
buf_len += (size_t)sret;
502
} while(sret != 0);
503
ret = close(outfifo_fd);
504
if(ret == -1){
505
if(errno != EINTR){
506
error_plus(0, errno, "close");
507
status = EX_OSERR;
508
}
509
goto failure;
510
}
511
outfifo_fd = -1;
512
513
if(interrupted_by_signal){
514
goto failure;
515
}
516
517
if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
518
if(errno != EINTR){
519
error_plus(0, errno, "usplash_write");
520
status = EX_OSERR;
521
}
522
goto failure;
523
}
524
525
if(interrupted_by_signal){
526
goto failure;
527
}
528
529
ret = close(fifo_fd);
530
if(ret == -1){
531
if(errno != EINTR){
532
error_plus(0, errno, "close");
533
status = EX_OSERR;
534
}
535
goto failure;
536
}
537
fifo_fd = -1;
538
539
/* Print password to stdout */
540
size_t written = 0;
541
while(written < buf_len){
542
do {
543
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
544
if(sret == -1){
545
if(errno != EINTR){
546
error_plus(0, errno, "write");
547
status = EX_OSERR;
548
}
549
goto failure;
550
}
551
} while(sret == -1);
552
553
if(interrupted_by_signal){
554
goto failure;
555
}
556
written += (size_t)sret;
557
}
558
free(buf);
559
buf = NULL;
560
561
if(interrupted_by_signal){
562
goto failure;
563
}
564
565
free(cmdline);
566
return EXIT_SUCCESS;
567
568
failure:
569
570
free(buf);
571
572
free(prompt);
573
574
/* If usplash was never accessed, we can stop now */
575
if(not usplash_accessed){
576
return status;
577
}
578
579
/* Close FIFO */
580
if(fifo_fd != -1){
581
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
582
if(ret == -1 and errno != EINTR){
583
error_plus(0, errno, "close");
584
}
585
fifo_fd = -1;
586
}
587
588
/* Close output FIFO */
589
if(outfifo_fd != -1){
590
ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
591
if(ret == -1){
592
error_plus(0, errno, "close");
593
}
594
}
595
596
/* Create argv for new usplash*/
597
char **cmdline_argv = malloc((argz_count(cmdline, cmdline_len) + 1)
598
* sizeof(char *)); /* Count args */
599
if(cmdline_argv == NULL){
600
error_plus(0, errno, "malloc");
601
return status;
602
}
603
argz_extract(cmdline, cmdline_len, cmdline_argv); /* Create argv */
604
485
605
/* Kill old usplash */
486
606
kill(usplash_pid, SIGTERM);
487
607
sleep(2);
489
609
kill(usplash_pid, SIGKILL);
490
610
sleep(1);
491
611
}
612
492
613
pid_t new_usplash_pid = fork();
493
614
if(new_usplash_pid == 0){
494
615
/* Child; will become new usplash process */
497
618
the real user ID (_mandos) */
498
619
ret = setuid(geteuid());
499
620
if(ret == -1){
500
perror("setuid");
621
error_plus(0, errno, "setuid");
501
622
}
502
623
503
624
setsid();
504
625
ret = chdir("/");
626
if(ret == -1){
627
error_plus(0, errno, "chdir");
628
_exit(EX_OSERR);
629
}
505
630
/* if(fork() != 0){ */
506
631
/* _exit(EXIT_SUCCESS); */
507
632
/* } */
508
633
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
509
634
if(ret == -1){
510
perror("dup2");
511
_exit(EXIT_FAILURE);
635
error_plus(0, errno, "dup2");
636
_exit(EX_OSERR);
512
637
}
513
638
514
639
execv(usplash_name, cmdline_argv);
515
640
if(not interrupted_by_signal){
516
perror("execv");
641
error_plus(0, errno, "execv");
517
642
}
518
643
free(cmdline);
519
644
free(cmdline_argv);
520
_exit(EXIT_FAILURE);
645
_exit(EX_OSERR);
521
646
}
522
647
free(cmdline);
523
648
free(cmdline_argv);
524
649
sleep(2);
525
if(not usplash_write("PULSATE", NULL)
526
and (errno != EINTR)){
527
perror("usplash_write");
528
}
529
530
return EXIT_FAILURE;
650
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
651
if(errno != EINTR){
652
error_plus(0, errno, "usplash_write");
653
}
654
}
655
656
/* Close FIFO (again) */
657
if(fifo_fd != -1){
658
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
659
if(ret == -1 and errno != EINTR){
660
error_plus(0, errno, "close");
661
}
662
fifo_fd = -1;
663
}
664
665
if(interrupted_by_signal){
666
struct sigaction signal_action = { .sa_handler = SIG_DFL };
667
sigemptyset(&signal_action.sa_mask);
668
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
669
&signal_action, NULL));
670
if(ret == -1){
671
error_plus(0, errno, "sigaction");
672
}
673
do {
674
ret = raise(signal_received);
675
} while(ret != 0 and errno == EINTR);
676
if(ret != 0){
677
error_plus(0, errno, "raise");
678
abort();
679
}
680
TEMP_FAILURE_RETRY(pause());
681
}
682
683
return status;
531
684
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0