3
3
* Plymouth - Read a password from Plymouth and output it
5
* Copyright © 2010-2017 Teddy Hogeborn
6
* Copyright © 2010-2017 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
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
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
23
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
26
25
#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
55
54
#include <stdarg.h> /* va_list, va_start(), ... */
57
56
sig_atomic_t interrupted_by_signal = 0;
59
/* Used by Ubuntu 11.04 (Natty Narwahl) */
60
const char plymouth_old_old_pid[] = "/dev/.initramfs/plymouth.pid";
61
/* Used by Ubuntu 11.10 (Oneiric Ocelot) */
62
const char plymouth_old_pid[] = "/run/initramfs/plymouth.pid";
63
/* Used by Debian 9 (stretch) */
64
const char plymouth_pid[] = "/run/plymouth/pid";
57
const char plymouth_pid[] = "/dev/.initramfs/plymouth.pid";
66
58
const char plymouth_path[] = "/bin/plymouth";
67
59
const char plymouthd_path[] = "/sbin/plymouthd";
68
60
const char *plymouthd_default_argv[] = {"/sbin/plymouthd",
70
62
"--attach-to-session",
73
68
static void termination_handler(__attribute__((unused))int signum){
80
75
/* Function to use when printing errors */
81
__attribute__((format (gnu_printf, 3, 4)))
82
76
void error_plus(int status, int errnum, const char *formatstring,
88
82
va_start(ap, formatstring);
89
83
ret = vasprintf(&text, formatstring, ap);
91
85
fprintf(stderr, "Mandos plugin %s: ",
92
86
program_invocation_short_name);
93
87
vfprintf(stderr, formatstring, ap);
160
__attribute__((nonnull (2, 3)))
161
154
bool exec_and_wait(pid_t *pid_return, const char *path,
162
const char * const *argv, bool interruptable,
155
const char **argv, bool interruptable,
180
char **new_argv = malloc(sizeof(const char *));
181
if(new_argv == NULL){
182
error_plus(0, errno, "malloc");
173
char **new_argv = NULL;
187
for (; argv[i] != NULL; i++){
188
tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 2));
176
for (; argv[i]!=NULL; i++){
177
tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 1));
190
179
error_plus(0, errno, "realloc");
224
__attribute__((nonnull))
225
213
int is_plymouth(const struct dirent *proc_entry){
231
proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
219
maxvalue = strtoumax(proc_entry->d_name, &tmp, 10);
233
221
if(errno != 0 or *tmp != '\0'
234
or proc_id != (uintmax_t)((pid_t)proc_id)){
222
or maxvalue != (uintmax_t)((pid_t)maxvalue)){
273
261
pid_t get_pid(void){
275
uintmax_t proc_id = 0;
276
263
FILE *pidfile = fopen(plymouth_pid, "r");
277
/* Try the new pid file location */
264
uintmax_t maxvalue = 0;
278
265
if(pidfile != NULL){
279
ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
266
ret = fscanf(pidfile, "%" SCNuMAX, &maxvalue);
285
/* Try the old pid file location */
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);
307
/* Look for a plymouth process */
309
273
struct dirent **direntries = NULL;
310
274
ret = scandir("/proc", &direntries, is_plymouth, alphasort);
312
276
error_plus(0, errno, "scandir");
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");
279
ret = sscanf(direntries[0]->d_name, "%" SCNuMAX, &maxvalue);
281
error_plus(0, errno, "sscanf");
325
284
/* scandir might preallocate for this variable (man page unclear).
404
363
argz_extract(cmdline, cmdline_len, argv); /* Create argv */
364
return (const char **)argv;
408
367
int main(__attribute__((unused))int argc,
484
443
kill_and_wait(plymouth_command_pid);
486
char **plymouthd_argv = NULL;
445
const char **plymouthd_argv;
487
446
pid_t pid = get_pid();
489
448
error_plus(0, 0, "plymouthd pid not found");
449
plymouthd_argv = plymouthd_default_argv;
491
451
plymouthd_argv = getargv(pid);
495
455
{ plymouth_path, "quit", NULL },
498
if(plymouthd_argv != NULL){
499
free(*plymouthd_argv);
500
free(plymouthd_argv);
502
458
exit(EXIT_FAILURE);
504
bret = exec_and_wait(NULL, plymouthd_path,
505
(plymouthd_argv != NULL)
506
? (const char * const *)plymouthd_argv
507
: plymouthd_default_argv,
460
bret = exec_and_wait(NULL, plymouthd_path, plymouthd_argv,
509
if(plymouthd_argv != NULL){
510
free(*plymouthd_argv);
511
free(plymouthd_argv);
514
463
exit(EXIT_FAILURE);
added
removed
plugins.d/plymouth.c
