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- Committer: Teddy Hogeborn
- Date: 2008-10-01 15:29:01 UTC
- Revision ID: teddy@fukt.bsnet.se-20081001152901-fh30whl3m4vb7m24
* debian/changelog: New Debian revision.
* debian/mandos-client.lintian-overrides: Added comments.
* debian/mandos.lintian-overrides: - '' -
* debian/mandos-client.lintian-overrides: Added comments.
* debian/mandos.lintian-overrides: - '' -
- files added:
- debian/mandos-client.config
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
plugins.d/usplash.c
1
/* -*- coding: utf-8 -*- */
2
/*
3
* Usplash - Read a password from usplash and output it
4
*
5
* Copyright © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 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
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16
* General Public License for more details.
17
*
18
* 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
*
22
* Contact the authors at <mandos@fukt.bsnet.se>.
23
*/
24
25
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
1
#define _GNU_SOURCE /* asprintf() */
26
2
#include <signal.h> /* sig_atomic_t, struct sigaction,
27
3
sigemptyset(), sigaddset(), SIGINT,
28
4
SIGHUP, SIGTERM, sigaction(),
29
5
SIG_IGN, kill(), SIGKILL */
30
6
#include <stdbool.h> /* bool, false, true */
31
7
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
32
#include <iso646.h> /* and, or, not*/
33
8
#include <errno.h> /* errno, EINTR */
34
#include <error.h>
35
#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR, struct
36
dirent */
9
#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR,
10
struct dirent */
37
11
#include <stddef.h> /* NULL */
38
#include <string.h> /* strlen(), memcmp(), strerror() */
39
#include <stdio.h> /* asprintf(), vasprintf(), vprintf(), fprintf() */
12
#include <string.h> /* strlen(), memcmp() */
13
#include <stdio.h> /* asprintf(), perror() */
40
14
#include <unistd.h> /* close(), write(), readlink(),
41
15
read(), STDOUT_FILENO, sleep(),
42
16
fork(), setuid(), geteuid(),
43
17
setsid(), chdir(), dup2(),
44
18
STDERR_FILENO, execv() */
45
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
46
EXIT_SUCCESS, malloc(), _exit(),
47
getenv() */
19
#include <stdlib.h> /* free(), EXIT_FAILURE, strtoul(),
20
realloc(), EXIT_SUCCESS, malloc(),
21
_exit() */
22
#include <stdlib.h> /* getenv() */
48
23
#include <dirent.h> /* opendir(), readdir(), closedir() */
49
#include <inttypes.h> /* intmax_t, strtoimax() */
50
#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
51
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
52
#include <argz.h> /* argz_count(), argz_extract() */
53
#include <stdarg.h> /* va_list, va_start(), ... */
24
25
26
27
#include <iso646.h> /* and */
28
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
29
WEXITSTATUS() */
54
30
55
31
sig_atomic_t interrupted_by_signal = 0;
56
int signal_received;
57
const char usplash_name[] = "/sbin/usplash";
58
59
/* Function to use when printing errors */
60
void error_plus(int status, int errnum, const char *formatstring, ...){
61
va_list ap;
62
char *text;
63
int ret;
64
65
va_start(ap, formatstring);
66
ret = vasprintf(&text, formatstring, ap);
67
if (ret == -1){
68
fprintf(stderr, "Mandos plugin %s: ", program_invocation_short_name);
69
vfprintf(stderr, formatstring, ap);
70
fprintf(stderr, ": ");
71
fprintf(stderr, "%s\n", strerror(errnum));
72
error(status, errno, "vasprintf while printing error");
73
return;
74
}
75
fprintf(stderr, "Mandos plugin ");
76
error(status, errnum, "%s", text);
77
free(text);
78
}
79
80
static void termination_handler(int signum){
81
if(interrupted_by_signal){
82
return;
83
}
32
33
static void termination_handler(__attribute__((unused))int signum){
84
34
interrupted_by_signal = 1;
85
signal_received = signum;
86
35
}
87
36
88
static bool usplash_write(int *fifo_fd_r,
89
const char *cmd, const char *arg){
37
static bool usplash_write(const char *cmd, const char *arg){
90
38
/*
91
* usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
92
* usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
39
* usplash_write("TIMEOUT", "15"); -> "TIMEOUT 15\0"
40
* usplash_write("PULSATE", NULL); -> "PULSATE\0"
93
41
* SEE ALSO
94
42
* usplash_write(8)
95
43
*/
96
44
int ret;
97
if(*fifo_fd_r == -1){
98
ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
99
if(ret == -1){
45
int fifo_fd;
46
do{
47
fifo_fd = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
48
if(fifo_fd == -1 and (errno != EINTR or interrupted_by_signal)){
100
49
return false;
101
50
}
102
*fifo_fd_r = ret;
103
}
51
}while(fifo_fd == -1);
104
52
105
53
const char *cmd_line;
106
54
size_t cmd_line_len;
107
55
char *cmd_line_alloc = NULL;
108
56
if(arg == NULL){
109
57
cmd_line = cmd;
110
cmd_line_len = strlen(cmd) + 1;
111
} else {
112
do {
58
cmd_line_len = strlen(cmd);
59
}else{
60
do{
113
61
ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
114
if(ret == -1){
62
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
115
63
int e = errno;
116
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
64
close(fifo_fd);
117
65
errno = e;
118
66
return false;
119
67
}
120
} while(ret == -1);
68
}while(ret == -1);
121
69
cmd_line = cmd_line_alloc;
122
70
cmd_line_len = (size_t)ret + 1;
123
71
}
124
72
125
73
size_t written = 0;
126
ssize_t sret = 0;
127
while(written < cmd_line_len){
128
sret = write(*fifo_fd_r, cmd_line + written,
129
cmd_line_len - written);
130
if(sret == -1){
131
int e = errno;
132
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
133
free(cmd_line_alloc);
134
errno = e;
135
return false;
74
while(not interrupted_by_signal and written < cmd_line_len){
75
ret = write(fifo_fd, cmd_line + written,
76
cmd_line_len - written);
77
if(ret == -1){
78
if(errno != EINTR or interrupted_by_signal){
79
int e = errno;
80
close(fifo_fd);
81
free(cmd_line_alloc);
82
errno = e;
83
return false;
84
} else {
85
continue;
86
}
136
87
}
137
written += (size_t)sret;
88
written += (size_t)ret;
138
89
}
139
90
free(cmd_line_alloc);
140
91
do{
92
ret = close(fifo_fd);
93
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
94
return false;
95
}
96
}while(ret == -1);
97
if(interrupted_by_signal){
98
return false;
99
}
141
100
return true;
142
101
}
143
102
144
/* Create prompt string */
145
char *makeprompt(void){
146
int ret = 0;
147
char *prompt;
148
const char *const cryptsource = getenv("cryptsource");
149
const char *const crypttarget = getenv("crypttarget");
150
const char prompt_start[] = "Enter passphrase to unlock the disk";
151
152
if(cryptsource == NULL){
153
if(crypttarget == NULL){
154
ret = asprintf(&prompt, "%s: ", prompt_start);
155
} else {
156
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
157
crypttarget);
158
}
159
} else {
160
if(crypttarget == NULL){
161
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
162
} else {
163
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
164
cryptsource, crypttarget);
165
}
166
}
167
if(ret == -1){
168
return NULL;
169
}
170
return prompt;
171
}
172
173
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
174
int ret = 0;
175
ssize_t sret = 0;
103
int main(__attribute__((unused))int argc,
104
__attribute__((unused))char **argv){
105
int ret = 0;
106
ssize_t sret;
107
bool an_error_occured = false;
108
109
/* Create prompt string */
110
char *prompt = NULL;
111
{
112
const char *const cryptsource = getenv("cryptsource");
113
const char *const crypttarget = getenv("crypttarget");
114
const char prompt_start[] = "Enter passphrase to unlock the disk";
115
116
if(cryptsource == NULL){
117
if(crypttarget == NULL){
118
ret = asprintf(&prompt, "%s: ", prompt_start);
119
} else {
120
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
121
crypttarget);
122
}
123
} else {
124
if(crypttarget == NULL){
125
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
126
} else {
127
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
128
cryptsource, crypttarget);
129
}
130
}
131
if(ret == -1){
132
return EXIT_FAILURE;
133
}
134
}
135
136
/* Find usplash process */
137
pid_t usplash_pid = 0;
176
138
char *cmdline = NULL;
177
139
size_t cmdline_len = 0;
178
DIR *proc_dir = opendir("/proc");
179
if(proc_dir == NULL){
180
error_plus(0, errno, "opendir");
181
return -1;
182
}
183
errno = 0;
184
for(struct dirent *proc_ent = readdir(proc_dir);
185
proc_ent != NULL;
186
proc_ent = readdir(proc_dir)){
187
pid_t pid;
188
{
189
intmax_t tmpmax;
190
char *tmp;
191
tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
192
if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
193
or tmpmax != (pid_t)tmpmax){
140
const char usplash_name[] = "/sbin/usplash";
141
{
142
DIR *proc_dir = opendir("/proc");
143
if(proc_dir == NULL){
144
free(prompt);
145
perror("opendir");
146
return EXIT_FAILURE;
147
}
148
for(struct dirent *proc_ent = readdir(proc_dir);
149
proc_ent != NULL;
150
proc_ent = readdir(proc_dir)){
151
pid_t pid = (pid_t) strtoul(proc_ent->d_name, NULL, 10);
152
if(pid == 0){
194
153
/* Not a process */
195
errno = 0;
196
continue;
197
}
198
pid = (pid_t)tmpmax;
199
}
200
/* Find the executable name by doing readlink() on the
201
/proc/<pid>/exe link */
202
char exe_target[sizeof(usplash_name)];
203
{
204
/* create file name string */
205
char *exe_link;
206
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
207
if(ret == -1){
208
error_plus(0, errno, "asprintf");
209
goto fail_find_usplash;
210
}
211
212
/* Check that it refers to a symlink owned by root:root */
213
struct stat exe_stat;
214
ret = lstat(exe_link, &exe_stat);
215
if(ret == -1){
216
if(errno == ENOENT){
217
free(exe_link);
218
continue;
219
}
220
error_plus(0, errno, "lstat");
221
free(exe_link);
222
goto fail_find_usplash;
223
}
224
if(not S_ISLNK(exe_stat.st_mode)
225
or exe_stat.st_uid != 0
226
or exe_stat.st_gid != 0){
227
free(exe_link);
228
continue;
229
}
230
231
sret = readlink(exe_link, exe_target, sizeof(exe_target));
232
free(exe_link);
233
}
234
/* Compare executable name */
235
if((sret != ((ssize_t)sizeof(exe_target)-1))
236
or (memcmp(usplash_name, exe_target,
237
sizeof(exe_target)-1) != 0)){
238
/* Not it */
239
continue;
240
}
241
/* Found usplash */
242
/* Read and save the command line of usplash in "cmdline" */
243
{
244
/* Open /proc/<pid>/cmdline */
245
int cl_fd;
154
continue;
155
}
156
/* Find the executable name by doing readlink() on the
157
/proc/<pid>/exe link */
158
char exe_target[sizeof(usplash_name)];
246
159
{
247
char *cmdline_filename;
248
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
249
proc_ent->d_name);
160
char *exe_link;
161
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
250
162
if(ret == -1){
251
error_plus(0, errno, "asprintf");
252
goto fail_find_usplash;
163
perror("asprintf");
164
free(prompt);
165
closedir(proc_dir);
166
return EXIT_FAILURE;
253
167
}
254
cl_fd = open(cmdline_filename, O_RDONLY);
255
free(cmdline_filename);
256
if(cl_fd == -1){
257
error_plus(0, errno, "open");
258
goto fail_find_usplash;
168
sret = readlink(exe_link, exe_target, sizeof(exe_target));
169
free(exe_link);
170
if(sret == -1){
171
continue;
259
172
}
260
173
}
261
size_t cmdline_allocated = 0;
262
char *tmp;
263
const size_t blocksize = 1024;
264
do {
265
/* Allocate more space? */
266
if(cmdline_len + blocksize > cmdline_allocated){
267
tmp = realloc(cmdline, cmdline_allocated + blocksize);
268
if(tmp == NULL){
269
error_plus(0, errno, "realloc");
270
close(cl_fd);
271
goto fail_find_usplash;
174
if((sret == ((ssize_t)sizeof(exe_target)-1))
175
and (memcmp(usplash_name, exe_target,
176
sizeof(exe_target)-1) == 0)){
177
usplash_pid = pid;
178
/* Read and save the command line of usplash in "cmdline" */
179
{
180
/* Open /proc/<pid>/cmdline */
181
int cl_fd;
182
{
183
char *cmdline_filename;
184
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
185
proc_ent->d_name);
186
if(ret == -1){
187
perror("asprintf");
188
free(prompt);
189
closedir(proc_dir);
190
return EXIT_FAILURE;
191
}
192
cl_fd = open(cmdline_filename, O_RDONLY);
193
if(cl_fd == -1){
194
perror("open");
195
free(cmdline_filename);
196
free(prompt);
197
closedir(proc_dir);
198
return EXIT_FAILURE;
199
}
200
free(cmdline_filename);
272
201
}
273
cmdline = tmp;
274
cmdline_allocated += blocksize;
275
}
276
/* Read data */
277
sret = read(cl_fd, cmdline + cmdline_len,
278
cmdline_allocated - cmdline_len);
279
if(sret == -1){
280
error_plus(0, errno, "read");
202
size_t cmdline_allocated = 0;
203
char *tmp;
204
const size_t blocksize = 1024;
205
do{
206
if(cmdline_len + blocksize > cmdline_allocated){
207
tmp = realloc(cmdline, cmdline_allocated + blocksize);
208
if(tmp == NULL){
209
perror("realloc");
210
free(cmdline);
211
free(prompt);
212
closedir(proc_dir);
213
return EXIT_FAILURE;
214
}
215
cmdline = tmp;
216
cmdline_allocated += blocksize;
217
}
218
sret = read(cl_fd, cmdline + cmdline_len,
219
cmdline_allocated - cmdline_len);
220
if(sret == -1){
221
perror("read");
222
free(cmdline);
223
free(prompt);
224
closedir(proc_dir);
225
return EXIT_FAILURE;
226
}
227
cmdline_len += (size_t)sret;
228
} while(sret != 0);
281
229
close(cl_fd);
282
goto fail_find_usplash;
283
230
}
284
cmdline_len += (size_t)sret;
285
} while(sret != 0);
286
ret = close(cl_fd);
287
if(ret == -1){
288
error_plus(0, errno, "close");
289
goto fail_find_usplash;
231
break;
290
232
}
291
233
}
292
/* Close directory */
293
ret = closedir(proc_dir);
294
if(ret == -1){
295
error_plus(0, errno, "closedir");
296
goto fail_find_usplash;
297
}
298
/* Success */
299
*cmdline_r = cmdline;
300
*cmdline_len_r = cmdline_len;
301
return pid;
302
}
303
304
fail_find_usplash:
305
306
free(cmdline);
307
if(proc_dir != NULL){
308
int e = errno;
309
234
closedir(proc_dir);
310
errno = e;
311
}
312
return 0;
313
}
314
315
int main(__attribute__((unused))int argc,
316
__attribute__((unused))char **argv){
317
int ret = 0;
318
ssize_t sret;
319
int fifo_fd = -1;
320
int outfifo_fd = -1;
321
char *buf = NULL;
322
size_t buf_len = 0;
323
pid_t usplash_pid = -1;
324
bool usplash_accessed = false;
325
int status = EXIT_FAILURE; /* Default failure exit status */
326
327
char *prompt = makeprompt();
328
if(prompt == NULL){
329
status = EX_OSERR;
330
goto failure;
331
}
332
333
/* Find usplash process */
334
char *cmdline = NULL;
335
size_t cmdline_len = 0;
336
usplash_pid = find_usplash(&cmdline, &cmdline_len);
235
}
337
236
if(usplash_pid == 0){
338
status = EX_UNAVAILABLE;
339
goto failure;
237
free(prompt);
238
return EXIT_FAILURE;
340
239
}
341
240
342
241
/* Set up the signal handler */
345
244
new_action = { .sa_handler = termination_handler,
346
245
.sa_flags = 0 };
347
246
sigemptyset(&new_action.sa_mask);
348
ret = sigaddset(&new_action.sa_mask, SIGINT);
349
if(ret == -1){
350
error_plus(0, errno, "sigaddset");
351
status = EX_OSERR;
352
goto failure;
353
}
354
ret = sigaddset(&new_action.sa_mask, SIGHUP);
355
if(ret == -1){
356
error_plus(0, errno, "sigaddset");
357
status = EX_OSERR;
358
goto failure;
359
}
360
ret = sigaddset(&new_action.sa_mask, SIGTERM);
361
if(ret == -1){
362
error_plus(0, errno, "sigaddset");
363
status = EX_OSERR;
364
goto failure;
365
}
247
sigaddset(&new_action.sa_mask, SIGINT);
248
sigaddset(&new_action.sa_mask, SIGHUP);
249
sigaddset(&new_action.sa_mask, SIGTERM);
366
250
ret = sigaction(SIGINT, NULL, &old_action);
367
251
if(ret == -1){
368
if(errno != EINTR){
369
error_plus(0, errno, "sigaction");
370
status = EX_OSERR;
371
}
372
goto failure;
252
perror("sigaction");
253
free(prompt);
254
return EXIT_FAILURE;
373
255
}
374
if(old_action.sa_handler != SIG_IGN){
256
if (old_action.sa_handler != SIG_IGN){
375
257
ret = sigaction(SIGINT, &new_action, NULL);
376
258
if(ret == -1){
377
if(errno != EINTR){
378
error_plus(0, errno, "sigaction");
379
status = EX_OSERR;
380
}
381
goto failure;
259
perror("sigaction");
260
free(prompt);
261
return EXIT_FAILURE;
382
262
}
383
263
}
384
264
ret = sigaction(SIGHUP, NULL, &old_action);
385
265
if(ret == -1){
386
if(errno != EINTR){
387
error_plus(0, errno, "sigaction");
388
status = EX_OSERR;
389
}
390
goto failure;
266
perror("sigaction");
267
free(prompt);
268
return EXIT_FAILURE;
391
269
}
392
if(old_action.sa_handler != SIG_IGN){
270
if (old_action.sa_handler != SIG_IGN){
393
271
ret = sigaction(SIGHUP, &new_action, NULL);
394
272
if(ret == -1){
395
if(errno != EINTR){
396
error_plus(0, errno, "sigaction");
397
status = EX_OSERR;
398
}
399
goto failure;
273
perror("sigaction");
274
free(prompt);
275
return EXIT_FAILURE;
400
276
}
401
277
}
402
278
ret = sigaction(SIGTERM, NULL, &old_action);
403
279
if(ret == -1){
404
if(errno != EINTR){
405
error_plus(0, errno, "sigaction");
406
status = EX_OSERR;
407
}
408
goto failure;
280
perror("sigaction");
281
free(prompt);
282
return EXIT_FAILURE;
409
283
}
410
if(old_action.sa_handler != SIG_IGN){
284
if (old_action.sa_handler != SIG_IGN){
411
285
ret = sigaction(SIGTERM, &new_action, NULL);
412
286
if(ret == -1){
413
if(errno != EINTR){
414
error_plus(0, errno, "sigaction");
415
status = EX_OSERR;
416
}
417
goto failure;
287
perror("sigaction");
288
free(prompt);
289
return EXIT_FAILURE;
418
290
}
419
291
}
420
292
}
421
293
422
usplash_accessed = true;
423
294
/* Write command to FIFO */
424
if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
425
if(errno != EINTR){
426
error_plus(0, errno, "usplash_write");
427
status = EX_OSERR;
428
}
429
goto failure;
430
}
431
432
if(interrupted_by_signal){
433
goto failure;
434
}
435
436
if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
437
if(errno != EINTR){
438
error_plus(0, errno, "usplash_write");
439
status = EX_OSERR;
440
}
441
goto failure;
442
}
443
444
if(interrupted_by_signal){
445
goto failure;
446
}
447
295
if(not interrupted_by_signal){
296
if(not usplash_write("TIMEOUT", "0")
297
and (errno != EINTR)){
298
perror("usplash_write");
299
an_error_occured = true;
300
}
301
}
302
if(not interrupted_by_signal and not an_error_occured){
303
if(not usplash_write("INPUTQUIET", prompt)
304
and (errno != EINTR)){
305
perror("usplash_write");
306
an_error_occured = true;
307
}
308
}
448
309
free(prompt);
449
prompt = NULL;
450
451
/* Read reply from usplash */
452
/* Open FIFO */
453
outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
454
if(outfifo_fd == -1){
455
if(errno != EINTR){
456
error_plus(0, errno, "open");
457
status = EX_OSERR;
458
}
459
goto failure;
460
}
461
462
if(interrupted_by_signal){
463
goto failure;
464
}
465
466
/* Read from FIFO */
467
size_t buf_allocated = 0;
468
const size_t blocksize = 1024;
469
do {
470
/* Allocate more space */
471
if(buf_len + blocksize > buf_allocated){
472
char *tmp = realloc(buf, buf_allocated + blocksize);
310
311
/* This is not really a loop; while() is used to be able to "break"
312
out of it; those breaks are marked "Big" */
313
while(not interrupted_by_signal and not an_error_occured){
314
char *buf = NULL;
315
size_t buf_len = 0;
316
317
/* Open FIFO */
318
int fifo_fd;
319
do{
320
fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
321
if(fifo_fd == -1){
322
if(errno != EINTR){
323
perror("open");
324
an_error_occured = true;
325
break;
326
}
327
if(interrupted_by_signal){
328
break;
329
}
330
}
331
}while(fifo_fd == -1);
332
if(interrupted_by_signal or an_error_occured){
333
break; /* Big */
334
}
335
336
/* Read from FIFO */
337
size_t buf_allocated = 0;
338
const size_t blocksize = 1024;
339
do{
340
if(buf_len + blocksize > buf_allocated){
341
char *tmp = realloc(buf, buf_allocated + blocksize);
342
if(tmp == NULL){
343
perror("realloc");
344
an_error_occured = true;
345
break;
346
}
347
buf = tmp;
348
buf_allocated += blocksize;
349
}
350
do{
351
sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
352
if(sret == -1){
353
if(errno != EINTR){
354
perror("read");
355
an_error_occured = true;
356
break;
357
}
358
if(interrupted_by_signal){
359
break;
360
}
361
}
362
}while(sret == -1);
363
if(interrupted_by_signal or an_error_occured){
364
break;
365
}
366
367
buf_len += (size_t)sret;
368
}while(sret != 0);
369
close(fifo_fd);
370
if(interrupted_by_signal or an_error_occured){
371
break; /* Big */
372
}
373
374
if(not usplash_write("TIMEOUT", "15")
375
and (errno != EINTR)){
376
perror("usplash_write");
377
an_error_occured = true;
378
}
379
if(interrupted_by_signal or an_error_occured){
380
break; /* Big */
381
}
382
383
/* Print password to stdout */
384
size_t written = 0;
385
while(written < buf_len){
386
do{
387
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
388
if(sret == -1){
389
if(errno != EINTR){
390
perror("write");
391
an_error_occured = true;
392
break;
393
}
394
if(interrupted_by_signal){
395
break;
396
}
397
}
398
}while(sret == -1);
399
if(interrupted_by_signal or an_error_occured){
400
break;
401
}
402
written += (size_t)sret;
403
}
404
free(buf);
405
if(not interrupted_by_signal and not an_error_occured){
406
free(cmdline);
407
return EXIT_SUCCESS;
408
}
409
break; /* Big */
410
}
411
412
/* If we got here, an error or interrupt must have happened */
413
414
int cmdline_argc = 0;
415
char **cmdline_argv = malloc(sizeof(char *));
416
/* Create argv and argc for new usplash*/
417
{
418
size_t position = 0;
419
while(position < cmdline_len){
420
char **tmp = realloc(cmdline_argv,
421
(sizeof(char *)
422
* (size_t)(cmdline_argc + 2)));
473
423
if(tmp == NULL){
474
if(errno != EINTR){
475
error_plus(0, errno, "realloc");
476
status = EX_OSERR;
477
}
478
goto failure;
479
}
480
buf = tmp;
481
buf_allocated += blocksize;
482
}
483
sret = read(outfifo_fd, buf + buf_len,
484
buf_allocated - buf_len);
485
if(sret == -1){
486
if(errno != EINTR){
487
error_plus(0, errno, "read");
488
status = EX_OSERR;
489
}
490
TEMP_FAILURE_RETRY(close(outfifo_fd));
491
goto failure;
492
}
493
if(interrupted_by_signal){
494
break;
495
}
496
497
buf_len += (size_t)sret;
498
} while(sret != 0);
499
ret = close(outfifo_fd);
500
if(ret == -1){
501
if(errno != EINTR){
502
error_plus(0, errno, "close");
503
status = EX_OSERR;
504
}
505
goto failure;
506
}
507
outfifo_fd = -1;
508
509
if(interrupted_by_signal){
510
goto failure;
511
}
512
513
if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
514
if(errno != EINTR){
515
error_plus(0, errno, "usplash_write");
516
status = EX_OSERR;
517
}
518
goto failure;
519
}
520
521
if(interrupted_by_signal){
522
goto failure;
523
}
524
525
ret = close(fifo_fd);
526
if(ret == -1){
527
if(errno != EINTR){
528
error_plus(0, errno, "close");
529
status = EX_OSERR;
530
}
531
goto failure;
532
}
533
fifo_fd = -1;
534
535
/* Print password to stdout */
536
size_t written = 0;
537
while(written < buf_len){
538
do {
539
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
540
if(sret == -1){
541
if(errno != EINTR){
542
error_plus(0, errno, "write");
543
status = EX_OSERR;
544
}
545
goto failure;
546
}
547
} while(sret == -1);
548
549
if(interrupted_by_signal){
550
goto failure;
551
}
552
written += (size_t)sret;
553
}
554
free(buf);
555
buf = NULL;
556
557
if(interrupted_by_signal){
558
goto failure;
559
}
560
561
free(cmdline);
562
return EXIT_SUCCESS;
563
564
failure:
565
566
free(buf);
567
568
free(prompt);
569
570
/* If usplash was never accessed, we can stop now */
571
if(not usplash_accessed){
572
return status;
573
}
574
575
/* Close FIFO */
576
if(fifo_fd != -1){
577
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
578
if(ret == -1 and errno != EINTR){
579
error_plus(0, errno, "close");
580
}
581
fifo_fd = -1;
582
}
583
584
/* Close output FIFO */
585
if(outfifo_fd != -1){
586
ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
587
if(ret == -1){
588
error_plus(0, errno, "close");
589
}
590
}
591
592
/* Create argv for new usplash*/
593
char **cmdline_argv = malloc((argz_count(cmdline, cmdline_len) + 1)
594
* sizeof(char *)); /* Count args */
595
if(cmdline_argv == NULL){
596
error_plus(0, errno, "malloc");
597
return status;
598
}
599
argz_extract(cmdline, cmdline_len, cmdline_argv); /* Create argv */
600
424
perror("realloc");
425
free(cmdline_argv);
426
return EXIT_FAILURE;
427
}
428
cmdline_argv = tmp;
429
cmdline_argv[cmdline_argc] = cmdline + position;
430
cmdline_argc++;
431
position += strlen(cmdline + position) + 1;
432
}
433
cmdline_argv[cmdline_argc] = NULL;
434
}
601
435
/* Kill old usplash */
602
kill(usplash_pid, SIGTERM);
603
sleep(2);
436
kill(usplash_pid, SIGTERM);
437
sleep(2);
604
438
while(kill(usplash_pid, 0) == 0){
605
439
kill(usplash_pid, SIGKILL);
606
440
sleep(1);
607
441
}
608
609
442
pid_t new_usplash_pid = fork();
610
443
if(new_usplash_pid == 0){
611
444
/* Child; will become new usplash process */
612
445
613
446
/* Make the effective user ID (root) the only user ID instead of
614
the real user ID (_mandos) */
447
the real user ID (mandos) */
615
448
ret = setuid(geteuid());
616
if(ret == -1){
617
error_plus(0, errno, "setuid");
449
if (ret == -1){
450
perror("setuid");
618
451
}
619
452
620
453
setsid();
621
454
ret = chdir("/");
622
if(ret == -1){
623
error_plus(0, errno, "chdir");
624
_exit(EX_OSERR);
625
}
626
455
/* if(fork() != 0){ */
627
456
/* _exit(EXIT_SUCCESS); */
628
457
/* } */
629
458
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
630
459
if(ret == -1){
631
error_plus(0, errno, "dup2");
632
_exit(EX_OSERR);
460
perror("dup2");
461
_exit(EXIT_FAILURE);
633
462
}
634
463
635
464
execv(usplash_name, cmdline_argv);
636
if(not interrupted_by_signal){
637
error_plus(0, errno, "execv");
638
}
465
perror("execv");
639
466
free(cmdline);
640
467
free(cmdline_argv);
641
_exit(EX_OSERR);
468
_exit(EXIT_FAILURE);
642
469
}
643
470
free(cmdline);
644
471
free(cmdline_argv);
645
472
sleep(2);
646
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
647
if(errno != EINTR){
648
error_plus(0, errno, "usplash_write");
649
}
650
}
651
652
/* Close FIFO (again) */
653
if(fifo_fd != -1){
654
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
655
if(ret == -1 and errno != EINTR){
656
error_plus(0, errno, "close");
657
}
658
fifo_fd = -1;
659
}
660
661
if(interrupted_by_signal){
662
struct sigaction signal_action = { .sa_handler = SIG_DFL };
663
sigemptyset(&signal_action.sa_mask);
664
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
665
&signal_action, NULL));
666
if(ret == -1){
667
error_plus(0, errno, "sigaction");
668
}
669
do {
670
ret = raise(signal_received);
671
} while(ret != 0 and errno == EINTR);
672
if(ret != 0){
673
error_plus(0, errno, "raise");
674
abort();
675
}
676
TEMP_FAILURE_RETRY(pause());
677
}
678
679
return status;
473
if(not usplash_write("PULSATE", NULL)
474
and (errno != EINTR)){
475
perror("usplash_write");
476
}
477
478
return EXIT_FAILURE;
680
479
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0