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- Committer: Teddy Hogeborn
- Date: 2009-01-13 04:29:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20090113042935-ztxe47n42q5z767b
* plugin-runner.c (main): Bug fix; do not accept a "d" character after
user ID or group ID numbers. Bug fix: use
"%u" when printing PID of coredumped plugin,
not "%d".
* plugins.d/password-prompt.c (main): Remove comment which was copied
from another program by mistake.
* plugins.d/splashy.c: Only comment changes.
* plugins.d/usplash.c: - '' -
user ID or group ID numbers. Bug fix: use
"%u" when printing PID of coredumped plugin,
not "%d".
* plugins.d/password-prompt.c (main): Remove comment which was copied
from another program by mistake.
* plugins.d/splashy.c: Only comment changes.
* plugins.d/usplash.c: - '' -
- files removed:
- DBUS-API
- debian/source
- files renamed:
- mandos-ctl => mandos-list
- 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 © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 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 <mandos@recompile.se>.
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
23
24
*/
24
25
25
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
26
#define _GNU_SOURCE /* asprintf() */
26
27
#include <signal.h> /* sig_atomic_t, struct sigaction,
27
28
sigemptyset(), sigaddset(), SIGINT,
28
29
SIGHUP, SIGTERM, sigaction(),
31
32
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
32
33
#include <iso646.h> /* and, or, not*/
33
34
#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(), strerror() */
39
#include <stdio.h> /* asprintf(), vasprintf(), vprintf(),
40
fprintf() */
38
#include <string.h> /* strlen(), memcmp() */
39
#include <stdio.h> /* asprintf(), perror(), sscanf() */
41
40
#include <unistd.h> /* close(), write(), readlink(),
42
41
read(), STDOUT_FILENO, sleep(),
43
42
fork(), setuid(), geteuid(),
44
43
setsid(), chdir(), dup2(),
45
44
STDERR_FILENO, execv() */
46
45
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
47
EXIT_SUCCESS, malloc(), _exit(),
48
getenv() */
46
EXIT_SUCCESS, malloc(), _exit() */
47
#include <stdlib.h> /* getenv() */
49
48
#include <dirent.h> /* opendir(), readdir(), closedir() */
50
#include <inttypes.h> /* intmax_t, strtoimax() */
51
49
#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(), ... */
55
50
56
51
sig_atomic_t interrupted_by_signal = 0;
57
int signal_received;
58
const char usplash_name[] = "/sbin/usplash";
59
60
/* Function to use when printing errors */
61
void error_plus(int status, int errnum, const char *formatstring,
62
...){
63
va_list ap;
64
char *text;
65
int ret;
66
67
va_start(ap, formatstring);
68
ret = vasprintf(&text, formatstring, ap);
69
if (ret == -1){
70
fprintf(stderr, "Mandos plugin %s: ",
71
program_invocation_short_name);
72
vfprintf(stderr, formatstring, ap);
73
fprintf(stderr, ": ");
74
fprintf(stderr, "%s\n", strerror(errnum));
75
error(status, errno, "vasprintf while printing error");
76
return;
77
}
78
fprintf(stderr, "Mandos plugin ");
79
error(status, errnum, "%s", text);
80
free(text);
81
}
82
83
static void termination_handler(int signum){
84
if(interrupted_by_signal){
85
return;
86
}
52
53
static void termination_handler(__attribute__((unused))int signum){
87
54
interrupted_by_signal = 1;
88
signal_received = signum;
89
55
}
90
56
91
static bool usplash_write(int *fifo_fd_r,
92
const char *cmd, const char *arg){
57
static bool usplash_write(const char *cmd, const char *arg){
93
58
/*
94
* usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
95
* usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
59
* usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
60
* usplash_write("PULSATE", NULL) will write "PULSATE\0"
96
61
* SEE ALSO
97
62
* usplash_write(8)
98
63
*/
99
64
int ret;
100
if(*fifo_fd_r == -1){
101
ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
102
if(ret == -1){
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)){
103
69
return false;
104
70
}
105
*fifo_fd_r = ret;
106
}
71
}while(fifo_fd == -1);
107
72
108
73
const char *cmd_line;
109
74
size_t cmd_line_len;
110
75
char *cmd_line_alloc = NULL;
111
76
if(arg == NULL){
112
77
cmd_line = cmd;
113
cmd_line_len = strlen(cmd) + 1;
114
} else {
115
do {
78
cmd_line_len = strlen(cmd);
79
}else{
80
do{
116
81
ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
117
if(ret == -1){
82
if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
118
83
int e = errno;
119
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
84
close(fifo_fd);
120
85
errno = e;
121
86
return false;
122
87
}
123
} while(ret == -1);
88
}while(ret == -1);
124
89
cmd_line = cmd_line_alloc;
125
90
cmd_line_len = (size_t)ret + 1;
126
91
}
127
92
128
93
size_t written = 0;
129
94
ssize_t sret = 0;
130
while(written < cmd_line_len){
131
sret = write(*fifo_fd_r, cmd_line + written,
95
while(not interrupted_by_signal and written < cmd_line_len){
96
sret = write(fifo_fd, cmd_line + written,
132
97
cmd_line_len - written);
133
98
if(sret == -1){
134
int e = errno;
135
TEMP_FAILURE_RETRY(close(*fifo_fd_r));
136
free(cmd_line_alloc);
137
errno = e;
138
return false;
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
}
139
108
}
140
109
written += (size_t)sret;
141
110
}
142
111
free(cmd_line_alloc);
143
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
}
144
121
return true;
145
122
}
146
123
147
/* Create prompt string */
148
char *makeprompt(void){
149
int ret = 0;
150
char *prompt;
151
const char *const cryptsource = getenv("cryptsource");
152
const char *const crypttarget = getenv("crypttarget");
153
const char prompt_start[] = "Enter passphrase to unlock the disk";
154
155
if(cryptsource == NULL){
156
if(crypttarget == NULL){
157
ret = asprintf(&prompt, "%s: ", prompt_start);
158
} else {
159
ret = asprintf(&prompt, "%s (%s): ", prompt_start,
160
crypttarget);
161
}
162
} else {
163
if(crypttarget == NULL){
164
ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
165
} else {
166
ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
167
cryptsource, crypttarget);
168
}
169
}
170
if(ret == -1){
171
return NULL;
172
}
173
return prompt;
174
}
175
176
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
177
int ret = 0;
178
ssize_t sret = 0;
124
int main(__attribute__((unused))int argc,
125
__attribute__((unused))char **argv){
126
int ret = 0;
127
ssize_t sret;
128
bool an_error_occured = false;
129
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
}
155
}
156
157
/* Find usplash process */
158
pid_t usplash_pid = 0;
179
159
char *cmdline = NULL;
180
160
size_t cmdline_len = 0;
181
DIR *proc_dir = opendir("/proc");
182
if(proc_dir == NULL){
183
error_plus(0, errno, "opendir");
184
return -1;
185
}
186
errno = 0;
187
for(struct dirent *proc_ent = readdir(proc_dir);
188
proc_ent != NULL;
189
proc_ent = readdir(proc_dir)){
190
pid_t pid;
191
{
192
intmax_t tmpmax;
193
char *tmp;
194
tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
195
if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
196
or tmpmax != (pid_t)tmpmax){
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){
197
176
/* Not a process */
198
errno = 0;
199
177
continue;
200
178
}
201
pid = (pid_t)tmpmax;
202
}
203
/* Find the executable name by doing readlink() on the
204
/proc/<pid>/exe link */
205
char exe_target[sizeof(usplash_name)];
206
{
207
/* create file name string */
208
char *exe_link;
209
ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
210
if(ret == -1){
211
error_plus(0, errno, "asprintf");
212
goto fail_find_usplash;
213
}
214
215
/* Check that it refers to a symlink owned by root:root */
216
struct stat exe_stat;
217
ret = lstat(exe_link, &exe_stat);
218
if(ret == -1){
219
if(errno == ENOENT){
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){
220
210
free(exe_link);
221
211
continue;
222
212
}
223
error_plus(0, errno, "lstat");
224
free(exe_link);
225
goto fail_find_usplash;
226
}
227
if(not S_ISLNK(exe_stat.st_mode)
228
or exe_stat.st_uid != 0
229
or exe_stat.st_gid != 0){
230
free(exe_link);
231
continue;
232
}
233
213
234
sret = readlink(exe_link, exe_target, sizeof(exe_target));
235
free(exe_link);
236
}
237
/* Compare executable name */
238
if((sret != ((ssize_t)sizeof(exe_target)-1))
239
or (memcmp(usplash_name, exe_target,
240
sizeof(exe_target)-1) != 0)){
241
/* Not it */
242
continue;
243
}
244
/* Found usplash */
245
/* Read and save the command line of usplash in "cmdline" */
246
{
247
/* Open /proc/<pid>/cmdline */
248
int cl_fd;
249
{
250
char *cmdline_filename;
251
ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
252
proc_ent->d_name);
253
if(ret == -1){
254
error_plus(0, errno, "asprintf");
255
goto fail_find_usplash;
256
}
257
cl_fd = open(cmdline_filename, O_RDONLY);
258
free(cmdline_filename);
259
if(cl_fd == -1){
260
error_plus(0, errno, "open");
261
goto fail_find_usplash;
262
}
214
sret = readlink(exe_link, exe_target, sizeof(exe_target));
215
free(exe_link);
263
216
}
264
size_t cmdline_allocated = 0;
265
char *tmp;
266
const size_t blocksize = 1024;
267
do {
268
/* Allocate more space? */
269
if(cmdline_len + blocksize > cmdline_allocated){
270
tmp = realloc(cmdline, cmdline_allocated + blocksize);
271
if(tmp == NULL){
272
error_plus(0, errno, "realloc");
273
close(cl_fd);
274
goto fail_find_usplash;
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);
275
244
}
276
cmdline = tmp;
277
cmdline_allocated += blocksize;
278
}
279
/* Read data */
280
sret = read(cl_fd, cmdline + cmdline_len,
281
cmdline_allocated - cmdline_len);
282
if(sret == -1){
283
error_plus(0, errno, "read");
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);
284
272
close(cl_fd);
285
goto fail_find_usplash;
286
273
}
287
cmdline_len += (size_t)sret;
288
} while(sret != 0);
289
ret = close(cl_fd);
290
if(ret == -1){
291
error_plus(0, errno, "close");
292
goto fail_find_usplash;
274
break;
293
275
}
294
276
}
295
/* Close directory */
296
ret = closedir(proc_dir);
297
if(ret == -1){
298
error_plus(0, errno, "closedir");
299
goto fail_find_usplash;
300
}
301
/* Success */
302
*cmdline_r = cmdline;
303
*cmdline_len_r = cmdline_len;
304
return pid;
305
}
306
307
fail_find_usplash:
308
309
free(cmdline);
310
if(proc_dir != NULL){
311
int e = errno;
312
277
closedir(proc_dir);
313
errno = e;
314
}
315
return 0;
316
}
317
318
int main(__attribute__((unused))int argc,
319
__attribute__((unused))char **argv){
320
int ret = 0;
321
ssize_t sret;
322
int fifo_fd = -1;
323
int outfifo_fd = -1;
324
char *buf = NULL;
325
size_t buf_len = 0;
326
pid_t usplash_pid = -1;
327
bool usplash_accessed = false;
328
int status = EXIT_FAILURE; /* Default failure exit status */
329
330
char *prompt = makeprompt();
331
if(prompt == NULL){
332
status = EX_OSERR;
333
goto failure;
334
}
335
336
/* Find usplash process */
337
char *cmdline = NULL;
338
size_t cmdline_len = 0;
339
usplash_pid = find_usplash(&cmdline, &cmdline_len);
278
}
340
279
if(usplash_pid == 0){
341
status = EX_UNAVAILABLE;
342
goto failure;
280
free(prompt);
281
return EXIT_FAILURE;
343
282
}
344
283
345
284
/* Set up the signal handler */
348
287
new_action = { .sa_handler = termination_handler,
349
288
.sa_flags = 0 };
350
289
sigemptyset(&new_action.sa_mask);
351
ret = sigaddset(&new_action.sa_mask, SIGINT);
352
if(ret == -1){
353
error_plus(0, errno, "sigaddset");
354
status = EX_OSERR;
355
goto failure;
356
}
357
ret = sigaddset(&new_action.sa_mask, SIGHUP);
358
if(ret == -1){
359
error_plus(0, errno, "sigaddset");
360
status = EX_OSERR;
361
goto failure;
362
}
363
ret = sigaddset(&new_action.sa_mask, SIGTERM);
364
if(ret == -1){
365
error_plus(0, errno, "sigaddset");
366
status = EX_OSERR;
367
goto failure;
368
}
290
sigaddset(&new_action.sa_mask, SIGINT);
291
sigaddset(&new_action.sa_mask, SIGHUP);
292
sigaddset(&new_action.sa_mask, SIGTERM);
369
293
ret = sigaction(SIGINT, NULL, &old_action);
370
294
if(ret == -1){
371
if(errno != EINTR){
372
error_plus(0, errno, "sigaction");
373
status = EX_OSERR;
374
}
375
goto failure;
295
perror("sigaction");
296
free(prompt);
297
return EXIT_FAILURE;
376
298
}
377
299
if(old_action.sa_handler != SIG_IGN){
378
300
ret = sigaction(SIGINT, &new_action, NULL);
379
301
if(ret == -1){
380
if(errno != EINTR){
381
error_plus(0, errno, "sigaction");
382
status = EX_OSERR;
383
}
384
goto failure;
302
perror("sigaction");
303
free(prompt);
304
return EXIT_FAILURE;
385
305
}
386
306
}
387
307
ret = sigaction(SIGHUP, NULL, &old_action);
388
308
if(ret == -1){
389
if(errno != EINTR){
390
error_plus(0, errno, "sigaction");
391
status = EX_OSERR;
392
}
393
goto failure;
309
perror("sigaction");
310
free(prompt);
311
return EXIT_FAILURE;
394
312
}
395
313
if(old_action.sa_handler != SIG_IGN){
396
314
ret = sigaction(SIGHUP, &new_action, NULL);
397
315
if(ret == -1){
398
if(errno != EINTR){
399
error_plus(0, errno, "sigaction");
400
status = EX_OSERR;
401
}
402
goto failure;
316
perror("sigaction");
317
free(prompt);
318
return EXIT_FAILURE;
403
319
}
404
320
}
405
321
ret = sigaction(SIGTERM, NULL, &old_action);
406
322
if(ret == -1){
407
if(errno != EINTR){
408
error_plus(0, errno, "sigaction");
409
status = EX_OSERR;
410
}
411
goto failure;
323
perror("sigaction");
324
free(prompt);
325
return EXIT_FAILURE;
412
326
}
413
327
if(old_action.sa_handler != SIG_IGN){
414
328
ret = sigaction(SIGTERM, &new_action, NULL);
415
329
if(ret == -1){
416
if(errno != EINTR){
417
error_plus(0, errno, "sigaction");
418
status = EX_OSERR;
419
}
420
goto failure;
330
perror("sigaction");
331
free(prompt);
332
return EXIT_FAILURE;
421
333
}
422
334
}
423
335
}
424
336
425
usplash_accessed = true;
426
337
/* Write command to FIFO */
427
if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
428
if(errno != EINTR){
429
error_plus(0, errno, "usplash_write");
430
status = EX_OSERR;
431
}
432
goto failure;
433
}
434
435
if(interrupted_by_signal){
436
goto failure;
437
}
438
439
if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
440
if(errno != EINTR){
441
error_plus(0, errno, "usplash_write");
442
status = EX_OSERR;
443
}
444
goto failure;
445
}
446
447
if(interrupted_by_signal){
448
goto failure;
449
}
450
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
}
451
352
free(prompt);
452
prompt = NULL;
453
454
/* Read reply from usplash */
455
/* Open FIFO */
456
outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
457
if(outfifo_fd == -1){
458
if(errno != EINTR){
459
error_plus(0, errno, "open");
460
status = EX_OSERR;
461
}
462
goto failure;
463
}
464
465
if(interrupted_by_signal){
466
goto failure;
467
}
468
469
/* Read from FIFO */
470
size_t buf_allocated = 0;
471
const size_t blocksize = 1024;
472
do {
473
/* Allocate more space */
474
if(buf_len + blocksize > buf_allocated){
475
char *tmp = realloc(buf, buf_allocated + blocksize);
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)));
476
466
if(tmp == NULL){
477
if(errno != EINTR){
478
error_plus(0, errno, "realloc");
479
status = EX_OSERR;
480
}
481
goto failure;
482
}
483
buf = tmp;
484
buf_allocated += blocksize;
485
}
486
sret = read(outfifo_fd, buf + buf_len,
487
buf_allocated - buf_len);
488
if(sret == -1){
489
if(errno != EINTR){
490
error_plus(0, errno, "read");
491
status = EX_OSERR;
492
}
493
TEMP_FAILURE_RETRY(close(outfifo_fd));
494
goto failure;
495
}
496
if(interrupted_by_signal){
497
break;
498
}
499
500
buf_len += (size_t)sret;
501
} while(sret != 0);
502
ret = close(outfifo_fd);
503
if(ret == -1){
504
if(errno != EINTR){
505
error_plus(0, errno, "close");
506
status = EX_OSERR;
507
}
508
goto failure;
509
}
510
outfifo_fd = -1;
511
512
if(interrupted_by_signal){
513
goto failure;
514
}
515
516
if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
517
if(errno != EINTR){
518
error_plus(0, errno, "usplash_write");
519
status = EX_OSERR;
520
}
521
goto failure;
522
}
523
524
if(interrupted_by_signal){
525
goto failure;
526
}
527
528
ret = close(fifo_fd);
529
if(ret == -1){
530
if(errno != EINTR){
531
error_plus(0, errno, "close");
532
status = EX_OSERR;
533
}
534
goto failure;
535
}
536
fifo_fd = -1;
537
538
/* Print password to stdout */
539
size_t written = 0;
540
while(written < buf_len){
541
do {
542
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
543
if(sret == -1){
544
if(errno != EINTR){
545
error_plus(0, errno, "write");
546
status = EX_OSERR;
547
}
548
goto failure;
549
}
550
} while(sret == -1);
551
552
if(interrupted_by_signal){
553
goto failure;
554
}
555
written += (size_t)sret;
556
}
557
free(buf);
558
buf = NULL;
559
560
if(interrupted_by_signal){
561
goto failure;
562
}
563
564
free(cmdline);
565
return EXIT_SUCCESS;
566
567
failure:
568
569
free(buf);
570
571
free(prompt);
572
573
/* If usplash was never accessed, we can stop now */
574
if(not usplash_accessed){
575
return status;
576
}
577
578
/* Close FIFO */
579
if(fifo_fd != -1){
580
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
581
if(ret == -1 and errno != EINTR){
582
error_plus(0, errno, "close");
583
}
584
fifo_fd = -1;
585
}
586
587
/* Close output FIFO */
588
if(outfifo_fd != -1){
589
ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
590
if(ret == -1){
591
error_plus(0, errno, "close");
592
}
593
}
594
595
/* Create argv for new usplash*/
596
char **cmdline_argv = malloc((argz_count(cmdline, cmdline_len) + 1)
597
* sizeof(char *)); /* Count args */
598
if(cmdline_argv == NULL){
599
error_plus(0, errno, "malloc");
600
return status;
601
}
602
argz_extract(cmdline, cmdline_len, cmdline_argv); /* Create argv */
603
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
}
604
478
/* Kill old usplash */
605
479
kill(usplash_pid, SIGTERM);
606
480
sleep(2);
608
482
kill(usplash_pid, SIGKILL);
609
483
sleep(1);
610
484
}
611
612
485
pid_t new_usplash_pid = fork();
613
486
if(new_usplash_pid == 0){
614
487
/* Child; will become new usplash process */
617
490
the real user ID (_mandos) */
618
491
ret = setuid(geteuid());
619
492
if(ret == -1){
620
error_plus(0, errno, "setuid");
493
perror("setuid");
621
494
}
622
495
623
496
setsid();
624
497
ret = chdir("/");
625
if(ret == -1){
626
error_plus(0, errno, "chdir");
627
_exit(EX_OSERR);
628
}
629
498
/* if(fork() != 0){ */
630
499
/* _exit(EXIT_SUCCESS); */
631
500
/* } */
632
501
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
633
502
if(ret == -1){
634
error_plus(0, errno, "dup2");
635
_exit(EX_OSERR);
503
perror("dup2");
504
_exit(EXIT_FAILURE);
636
505
}
637
506
638
507
execv(usplash_name, cmdline_argv);
639
508
if(not interrupted_by_signal){
640
error_plus(0, errno, "execv");
509
perror("execv");
641
510
}
642
511
free(cmdline);
643
512
free(cmdline_argv);
644
_exit(EX_OSERR);
513
_exit(EXIT_FAILURE);
645
514
}
646
515
free(cmdline);
647
516
free(cmdline_argv);
648
517
sleep(2);
649
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
650
if(errno != EINTR){
651
error_plus(0, errno, "usplash_write");
652
}
653
}
654
655
/* Close FIFO (again) */
656
if(fifo_fd != -1){
657
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
658
if(ret == -1 and errno != EINTR){
659
error_plus(0, errno, "close");
660
}
661
fifo_fd = -1;
662
}
663
664
if(interrupted_by_signal){
665
struct sigaction signal_action = { .sa_handler = SIG_DFL };
666
sigemptyset(&signal_action.sa_mask);
667
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
668
&signal_action, NULL));
669
if(ret == -1){
670
error_plus(0, errno, "sigaction");
671
}
672
do {
673
ret = raise(signal_received);
674
} while(ret != 0 and errno == EINTR);
675
if(ret != 0){
676
error_plus(0, errno, "raise");
677
abort();
678
}
679
TEMP_FAILURE_RETRY(pause());
680
}
681
682
return status;
518
if(not usplash_write("PULSATE", NULL)
519
and (errno != EINTR)){
520
perror("usplash_write");
521
}
522
523
return EXIT_FAILURE;
683
524
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0