3
3
* Plymouth - Read a password from Plymouth and output it
5
* Copyright © 2010-2011 Teddy Hogeborn
6
* Copyright © 2010-2011 Björn Påhlsson
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.
13
* This program is distributed in the hope that it will be useful, but
5
* Copyright © 2010-2018 Teddy Hogeborn
6
* Copyright © 2010-2018 Björn Påhlsson
8
* This file is part of Mandos.
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.
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.
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/>.
22
23
* Contact the authors at <mandos@recompile.se>.
56
57
sig_atomic_t interrupted_by_signal = 0;
58
59
/* Used by Ubuntu 11.04 (Natty Narwahl) */
59
const char plymouth_old_pid[] = "/dev/.initramfs/plymouth.pid";
60
const char plymouth_old_old_pid[] = "/dev/.initramfs/plymouth.pid";
60
61
/* Used by Ubuntu 11.10 (Oneiric Ocelot) */
61
const char plymouth_pid[] = "/run/initramfs/plymouth.pid";
62
const char plymouth_old_pid[] = "/run/initramfs/plymouth.pid";
63
/* Used by Debian 9 (stretch) */
64
const char plymouth_pid[] = "/run/plymouth/pid";
63
66
const char plymouth_path[] = "/bin/plymouth";
64
67
const char plymouthd_path[] = "/sbin/plymouthd";
85
88
va_start(ap, formatstring);
86
89
ret = vasprintf(&text, formatstring, ap);
88
91
fprintf(stderr, "Mandos plugin %s: ",
89
92
program_invocation_short_name);
90
93
vfprintf(stderr, formatstring, ap);
160
__attribute__((nonnull (2, 3)))
157
161
bool exec_and_wait(pid_t *pid_return, const char *path,
158
const char **argv, bool interruptable,
162
const char * const *argv, bool interruptable,
176
char **new_argv = NULL;
180
char **new_argv = malloc(sizeof(const char *));
181
if(new_argv == NULL){
182
error_plus(0, errno, "malloc");
179
for (; argv[i]!=NULL; i++){
180
tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 1));
187
for (; argv[i] != NULL; i++){
188
tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 2));
182
190
error_plus(0, errno, "realloc");
224
__attribute__((nonnull))
216
225
int is_plymouth(const struct dirent *proc_entry){
222
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
231
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
224
233
if(errno != 0 or *tmp != '\0'
225
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
234
or proc_id != (uintmax_t)((pid_t)proc_id)){
264
273
pid_t get_pid(void){
266
uintmax_t maxvalue = 0;
275
uintmax_t proc_id = 0;
267
276
FILE *pidfile = fopen(plymouth_pid, "r");
268
277
/* Try the new pid file location */
269
278
if(pidfile != NULL){
270
ret = fscanf(pidfile, "%" SCNuMAX, &maxvalue);
279
ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
276
285
/* Try the old pid file location */
278
pidfile = fopen(plymouth_pid, "r");
280
ret = fscanf(pidfile, "%" SCNuMAX, &maxvalue);
287
pidfile = fopen(plymouth_old_pid, "r");
289
ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
296
/* Try the old old pid file location */
298
pidfile = fopen(plymouth_old_old_pid, "r");
300
ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
287
307
/* Look for a plymouth process */
289
309
struct dirent **direntries = NULL;
290
310
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
292
312
error_plus(0, errno, "scandir");
295
ret = sscanf(direntries[0]->d_name, "%" SCNuMAX, &maxvalue);
297
error_plus(0, errno, "sscanf");
315
for(int i = ret-1; i >= 0; i--){
317
ret = sscanf(direntries[i]->d_name, "%" SCNuMAX, &proc_id);
319
error_plus(0, errno, "sscanf");
300
325
/* scandir might preallocate for this variable (man page unclear).
379
404
argz_extract(cmdline, cmdline_len, argv); /* Create argv */
380
return (const char **)argv;
383
408
int main(__attribute__((unused))int argc,
459
484
kill_and_wait(plymouth_command_pid);
461
const char **plymouthd_argv;
486
char **plymouthd_argv = NULL;
462
487
pid_t pid = get_pid();
464
489
error_plus(0, 0, "plymouthd pid not found");
465
plymouthd_argv = plymouthd_default_argv;
467
491
plymouthd_argv = getargv(pid);
471
495
{ plymouth_path, "quit", NULL },
498
if(plymouthd_argv != NULL){
499
free(*plymouthd_argv);
500
free(plymouthd_argv);
474
502
exit(EXIT_FAILURE);
476
bret = exec_and_wait(NULL, plymouthd_path, plymouthd_argv,
504
bret = exec_and_wait(NULL, plymouthd_path,
505
(plymouthd_argv != NULL)
506
? (const char * const *)plymouthd_argv
507
: plymouthd_default_argv,
509
if(plymouthd_argv != NULL){
510
free(*plymouthd_argv);
511
free(plymouthd_argv);
479
514
exit(EXIT_FAILURE);