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- Committer: Teddy Hogeborn
- Date: 2019-03-17 21:29:32 UTC
- mto: This revision was merged to the branch mainline in revision 382.
- Revision ID: teddy@recompile.se-20190317212932-r3libgz33mkb85rw
mandos-ctl: Refactor
* mandos-ctl: For Python 2, use StringIO.StringIO as a replacement for
io.StringIO, since Python 2's io.StringIO won't work
with print redirection.
(Output.run, Output.output): Remove.
(DumpJSON.output): Rename to "run" and change signature to match.
Also change code to print instead of returning
string.
(PrintTable.output): - '' -
* mandos-ctl: For Python 2, use StringIO.StringIO as a replacement for
io.StringIO, since Python 2's io.StringIO won't work
with print redirection.
(Output.run, Output.output): Remove.
(DumpJSON.output): Rename to "run" and change signature to match.
Also change code to print instead of returning
string.
(PrintTable.output): - '' -
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files renamed:
- mandos-list => mandos-ctl
- 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 <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
23
* Contact the authors at <mandos@recompile.se>.
24
24
*/
25
25
26
#define _GNU_SOURCE /* asprintf() */
26
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
27
27
#include <signal.h> /* sig_atomic_t, struct sigaction,
28
28
sigemptyset(), sigaddset(), SIGINT,
29
29
SIGHUP, SIGTERM, sigaction(),
32
32
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
33
33
#include <iso646.h> /* and, or, not*/
34
34
#include <errno.h> /* errno, EINTR */
35
#include <error.h>
35
36
#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR, struct
36
37
dirent */
37
38
#include <stddef.h> /* NULL */
38
#include <string.h> /* strlen(), memcmp() */
39
#include <stdio.h> /* asprintf(), perror(), sscanf() */
39
#include <string.h> /* strlen(), memcmp(), strerror() */
40
#include <stdio.h> /* asprintf(), vasprintf(), vprintf(),
41
fprintf() */
40
42
#include <unistd.h> /* close(), write(), readlink(),
41
43
read(), STDOUT_FILENO, sleep(),
42
44
fork(), setuid(), geteuid(),
43
45
setsid(), chdir(), dup2(),
44
46
STDERR_FILENO, execv() */
45
47
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
46
EXIT_SUCCESS, malloc(), _exit() */
47
#include <stdlib.h> /* getenv() */
48
EXIT_SUCCESS, malloc(), _exit(),
49
getenv() */
48
50
#include <dirent.h> /* opendir(), readdir(), closedir() */
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);
79
}else{
80
do{
115
cmd_line_len = strlen(cmd) + 1;
116
} else {
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
}
88
}while(ret == -1);
125
} while(ret == -1);
89
126
cmd_line = cmd_line_alloc;
90
127
cmd_line_len = (size_t)ret + 1;
91
128
}
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
/* In the GNU C library, pid_t is always int */
174
ret = sscanf(proc_ent->d_name, "%d", &pid);
175
if(ret != 1){
176
/* Not a process */
177
continue;
178
}
179
/* Find the executable name by doing readlink() on the
180
/proc/<pid>/exe link */
181
char exe_target[sizeof(usplash_name)];
182
{
183
/* create file name string */
184
char *exe_link;
185
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
186
if(ret == -1){
187
perror("asprintf");
188
free(prompt);
189
closedir(proc_dir);
190
return EXIT_FAILURE;
191
}
192
193
/* Check that it refers to a symlink owned by root:root */
194
struct stat exe_stat;
195
ret = lstat(exe_link, &exe_stat);
196
if(ret == -1){
197
if(errno == ENOENT){
198
free(exe_link);
199
continue;
200
}
201
perror("lstat");
202
free(exe_link);
203
free(prompt);
204
closedir(proc_dir);
205
return EXIT_FAILURE;
206
}
207
if(not S_ISLNK(exe_stat.st_mode)
208
or exe_stat.st_uid != 0
209
or exe_stat.st_gid != 0){
210
free(exe_link);
211
continue;
212
}
213
214
sret = readlink(exe_link, exe_target, sizeof(exe_target));
215
free(exe_link);
216
}
217
if((sret == ((ssize_t)sizeof(exe_target)-1))
218
and (memcmp(usplash_name, exe_target,
219
sizeof(exe_target)-1) == 0)){
220
usplash_pid = pid;
221
/* Read and save the command line of usplash in "cmdline" */
222
{
223
/* Open /proc/<pid>/cmdline */
224
int cl_fd;
225
{
226
char *cmdline_filename;
227
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
228
proc_ent->d_name);
229
if(ret == -1){
230
perror("asprintf");
231
free(prompt);
232
closedir(proc_dir);
233
return EXIT_FAILURE;
234
}
235
cl_fd = open(cmdline_filename, O_RDONLY);
236
if(cl_fd == -1){
237
perror("open");
238
free(cmdline_filename);
239
free(prompt);
240
closedir(proc_dir);
241
return EXIT_FAILURE;
242
}
243
free(cmdline_filename);
244
}
245
size_t cmdline_allocated = 0;
246
char *tmp;
247
const size_t blocksize = 1024;
248
do{
249
if(cmdline_len + blocksize > cmdline_allocated){
250
tmp = realloc(cmdline, cmdline_allocated + blocksize);
251
if(tmp == NULL){
252
perror("realloc");
253
free(cmdline);
254
free(prompt);
255
closedir(proc_dir);
256
return EXIT_FAILURE;
257
}
258
cmdline = tmp;
259
cmdline_allocated += blocksize;
260
}
261
sret = read(cl_fd, cmdline + cmdline_len,
262
cmdline_allocated - cmdline_len);
263
if(sret == -1){
264
perror("read");
265
free(cmdline);
266
free(prompt);
267
closedir(proc_dir);
268
return EXIT_FAILURE;
269
}
270
cmdline_len += (size_t)sret;
271
} while(sret != 0);
272
close(cl_fd);
273
}
274
break;
275
}
276
}
277
closedir(proc_dir);
278
}
341
usplash_pid = find_usplash(&cmdline, &cmdline_len);
279
342
if(usplash_pid == 0){
280
free(prompt);
281
return EXIT_FAILURE;
343
status = EX_UNAVAILABLE;
344
goto failure;
282
345
}
283
346
284
347
/* Set up the signal handler */
287
350
new_action = { .sa_handler = termination_handler,
288
351
.sa_flags = 0 };
289
352
sigemptyset(&new_action.sa_mask);
290
sigaddset(&new_action.sa_mask, SIGINT);
291
sigaddset(&new_action.sa_mask, SIGHUP);
292
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
}
293
371
ret = sigaction(SIGINT, NULL, &old_action);
294
372
if(ret == -1){
295
perror("sigaction");
296
free(prompt);
297
return EXIT_FAILURE;
373
if(errno != EINTR){
374
error_plus(0, errno, "sigaction");
375
status = EX_OSERR;
376
}
377
goto failure;
298
378
}
299
379
if(old_action.sa_handler != SIG_IGN){
300
380
ret = sigaction(SIGINT, &new_action, NULL);
301
381
if(ret == -1){
302
perror("sigaction");
303
free(prompt);
304
return EXIT_FAILURE;
382
if(errno != EINTR){
383
error_plus(0, errno, "sigaction");
384
status = EX_OSERR;
385
}
386
goto failure;
305
387
}
306
388
}
307
389
ret = sigaction(SIGHUP, NULL, &old_action);
308
390
if(ret == -1){
309
perror("sigaction");
310
free(prompt);
311
return EXIT_FAILURE;
391
if(errno != EINTR){
392
error_plus(0, errno, "sigaction");
393
status = EX_OSERR;
394
}
395
goto failure;
312
396
}
313
397
if(old_action.sa_handler != SIG_IGN){
314
398
ret = sigaction(SIGHUP, &new_action, NULL);
315
399
if(ret == -1){
316
perror("sigaction");
317
free(prompt);
318
return EXIT_FAILURE;
400
if(errno != EINTR){
401
error_plus(0, errno, "sigaction");
402
status = EX_OSERR;
403
}
404
goto failure;
319
405
}
320
406
}
321
407
ret = sigaction(SIGTERM, NULL, &old_action);
322
408
if(ret == -1){
323
perror("sigaction");
324
free(prompt);
325
return EXIT_FAILURE;
409
if(errno != EINTR){
410
error_plus(0, errno, "sigaction");
411
status = EX_OSERR;
412
}
413
goto failure;
326
414
}
327
415
if(old_action.sa_handler != SIG_IGN){
328
416
ret = sigaction(SIGTERM, &new_action, NULL);
329
417
if(ret == -1){
330
perror("sigaction");
331
free(prompt);
332
return EXIT_FAILURE;
418
if(errno != EINTR){
419
error_plus(0, errno, "sigaction");
420
status = EX_OSERR;
421
}
422
goto failure;
333
423
}
334
424
}
335
425
}
336
426
427
usplash_accessed = true;
337
428
/* Write command to FIFO */
338
if(not interrupted_by_signal){
339
if(not usplash_write("TIMEOUT", "0")
340
and (errno != EINTR)){
341
perror("usplash_write");
342
an_error_occured = true;
343
}
344
}
345
if(not interrupted_by_signal and not an_error_occured){
346
if(not usplash_write("INPUTQUIET", prompt)
347
and (errno != EINTR)){
348
perror("usplash_write");
349
an_error_occured = true;
350
}
351
}
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
352
453
free(prompt);
353
354
/* This is not really a loop; while() is used to be able to "break"
355
out of it; those breaks are marked "Big" */
356
while(not interrupted_by_signal and not an_error_occured){
357
char *buf = NULL;
358
size_t buf_len = 0;
359
360
/* Open FIFO */
361
int fifo_fd;
362
do{
363
fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
364
if(fifo_fd == -1){
365
if(errno != EINTR){
366
perror("open");
367
an_error_occured = true;
368
break;
369
}
370
if(interrupted_by_signal){
371
break;
372
}
373
}
374
}while(fifo_fd == -1);
375
if(interrupted_by_signal or an_error_occured){
376
break; /* Big */
377
}
378
379
/* Read from FIFO */
380
size_t buf_allocated = 0;
381
const size_t blocksize = 1024;
382
do{
383
if(buf_len + blocksize > buf_allocated){
384
char *tmp = realloc(buf, buf_allocated + blocksize);
385
if(tmp == NULL){
386
perror("realloc");
387
an_error_occured = true;
388
break;
389
}
390
buf = tmp;
391
buf_allocated += blocksize;
392
}
393
do{
394
sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
395
if(sret == -1){
396
if(errno != EINTR){
397
perror("read");
398
an_error_occured = true;
399
break;
400
}
401
if(interrupted_by_signal){
402
break;
403
}
404
}
405
}while(sret == -1);
406
if(interrupted_by_signal or an_error_occured){
407
break;
408
}
409
410
buf_len += (size_t)sret;
411
}while(sret != 0);
412
close(fifo_fd);
413
if(interrupted_by_signal or an_error_occured){
414
break; /* Big */
415
}
416
417
if(not usplash_write("TIMEOUT", "15")
418
and (errno != EINTR)){
419
perror("usplash_write");
420
an_error_occured = true;
421
}
422
if(interrupted_by_signal or an_error_occured){
423
break; /* Big */
424
}
425
426
/* Print password to stdout */
427
size_t written = 0;
428
while(written < buf_len){
429
do{
430
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
431
if(sret == -1){
432
if(errno != EINTR){
433
perror("write");
434
an_error_occured = true;
435
break;
436
}
437
if(interrupted_by_signal){
438
break;
439
}
440
}
441
}while(sret == -1);
442
if(interrupted_by_signal or an_error_occured){
443
break;
444
}
445
written += (size_t)sret;
446
}
447
free(buf);
448
if(not interrupted_by_signal and not an_error_occured){
449
free(cmdline);
450
return EXIT_SUCCESS;
451
}
452
break; /* Big */
453
} /* end of non-loop while() */
454
455
/* If we got here, an error or interrupt must have happened */
456
457
/* Create argc and argv for new usplash*/
458
int cmdline_argc = 0;
459
char **cmdline_argv = malloc(sizeof(char *));
460
{
461
size_t position = 0;
462
while(position < cmdline_len){
463
char **tmp = realloc(cmdline_argv,
464
(sizeof(char *)
465
* (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);
466
478
if(tmp == NULL){
467
perror("realloc");
468
free(cmdline_argv);
469
return EXIT_FAILURE;
470
}
471
cmdline_argv = tmp;
472
cmdline_argv[cmdline_argc] = cmdline + position;
473
cmdline_argc++;
474
position += strlen(cmdline + position) + 1;
475
}
476
cmdline_argv[cmdline_argc] = NULL;
477
}
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
478
606
/* Kill old usplash */
479
607
kill(usplash_pid, SIGTERM);
480
608
sleep(2);
482
610
kill(usplash_pid, SIGKILL);
483
611
sleep(1);
484
612
}
613
485
614
pid_t new_usplash_pid = fork();
486
615
if(new_usplash_pid == 0){
487
616
/* Child; will become new usplash process */
490
619
the real user ID (_mandos) */
491
620
ret = setuid(geteuid());
492
621
if(ret == -1){
493
perror("setuid");
622
error_plus(0, errno, "setuid");
494
623
}
495
624
496
625
setsid();
497
626
ret = chdir("/");
627
if(ret == -1){
628
error_plus(0, errno, "chdir");
629
_exit(EX_OSERR);
630
}
498
631
/* if(fork() != 0){ */
499
632
/* _exit(EXIT_SUCCESS); */
500
633
/* } */
501
634
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
502
635
if(ret == -1){
503
perror("dup2");
504
_exit(EXIT_FAILURE);
636
error_plus(0, errno, "dup2");
637
_exit(EX_OSERR);
505
638
}
506
639
507
640
execv(usplash_name, cmdline_argv);
508
641
if(not interrupted_by_signal){
509
perror("execv");
642
error_plus(0, errno, "execv");
510
643
}
511
644
free(cmdline);
512
645
free(cmdline_argv);
513
_exit(EXIT_FAILURE);
646
_exit(EX_OSERR);
514
647
}
515
648
free(cmdline);
516
649
free(cmdline_argv);
517
650
sleep(2);
518
if(not usplash_write("PULSATE", NULL)
519
and (errno != EINTR)){
520
perror("usplash_write");
521
}
522
523
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;
524
685
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0