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- Committer: Teddy Hogeborn
- Date: 2016-03-19 21:51:01 UTC
- mfrom: (237.7.390 trunk)
- Revision ID: teddy@recompile.se-20160319215101-sw7h1dvhpvadw2mb
Merge from trunk
- files added:
- initramfs-tools-hook-conf
- files removed:
- debian/mandos-client.templates
- debian/tests
- dracut-module
- files modified:
- .bzrignore
added
removed
plugins.d/plymouth.c
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2
/*
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3
* Plymouth - Read a password from Plymouth and output it
4
4
*
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* Copyright © 2010-2022 Teddy Hogeborn
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* Copyright © 2010-2022 Björn Påhlsson
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*
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* This file is part of Mandos.
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*
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* Mandos is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2010-2016 Teddy Hogeborn
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* Copyright © 2010-2016 Björn Påhlsson
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*
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* 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
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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.
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17
*
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* You should have received a copy of the GNU General Public License
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* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Contact the authors at <mandos@recompile.se>.
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*/
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26
#define _GNU_SOURCE /* program_invocation_short_name,
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vasprintf(), asprintf(),
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TEMP_FAILURE_RETRY() */
29
#include <sys/types.h> /* sig_atomic_t, pid_t, setuid(),
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geteuid(), setsid() */
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#include <argp.h> /* argp_program_version,
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argp_program_bug_address,
33
struct argp_option,
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struct argp_state,
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ARGP_ERR_UNKNOWN, struct argp,
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argp_parse(), ARGP_IN_ORDER */
37
#include <stddef.h> /* NULL, size_t */
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#define _GNU_SOURCE /* asprintf(), TEMP_FAILURE_RETRY() */
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#include <signal.h> /* sig_atomic_t, struct sigaction,
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sigemptyset(), sigaddset(), SIGINT,
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SIGHUP, SIGTERM, sigaction(),
29
kill(), SIG_IGN */
38
30
#include <stdbool.h> /* bool, false, true */
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#include <stdio.h> /* FILE, fprintf(), vfprintf(),
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vasprintf(), stderr, asprintf(),
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fopen(), fscanf(), fclose(),
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sscanf() */
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#include <stdarg.h> /* va_list, va_start(), vfprintf() */
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#include <errno.h> /* program_invocation_short_name,
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errno, ENOMEM, EINTR, ENOENT,
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error_t, EINVAL */
47
#include <string.h> /* strerror(), strdup(), memcmp() */
31
#include <fcntl.h> /* open(), O_RDONLY */
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#include <iso646.h> /* and, or, not*/
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#include <sys/types.h> /* size_t, ssize_t, pid_t, struct
34
dirent, waitpid() */
35
#include <sys/wait.h> /* waitpid() */
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#include <stddef.h> /* NULL */
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#include <string.h> /* strchr(), memcmp() */
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#include <stdio.h> /* asprintf(), perror(), fopen(),
39
fscanf(), vasprintf(), fprintf(),
40
vfprintf() */
41
#include <unistd.h> /* close(), readlink(), read(),
42
fork(), setsid(), chdir(), dup2(),
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STDERR_FILENO, execv(), access() */
44
#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
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EXIT_SUCCESS, malloc(), _exit(),
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getenv() */
47
#include <dirent.h> /* scandir(), alphasort() */
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#include <inttypes.h> /* intmax_t, strtoumax(), SCNuMAX */
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#include <sys/stat.h> /* struct stat, lstat() */
50
#include <sysexits.h> /* EX_OSERR, EX_UNAVAILABLE */
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#include <error.h> /* error() */
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#include <stdlib.h> /* free(), getenv(), malloc(),
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reallocarray(), realloc(),
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EXIT_FAILURE, EXIT_SUCCESS */
52
#include <unistd.h> /* TEMP_FAILURE_RETRY(), setuid(),
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geteuid(), setsid(), chdir(),
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dup2(), STDERR_FILENO,
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STDOUT_FILENO, fork(), _exit(),
56
execv(), ssize_t, readlink(),
57
close(), read(), access(), X_OK */
58
#include <signal.h> /* kill(), SIGTERM, struct sigaction,
59
sigemptyset(), SIGINT, SIGHUP,
60
sigaddset(), SIG_IGN */
61
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
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WEXITSTATUS(), WIFSIGNALED(),
63
WTERMSIG() */
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#include <iso646.h> /* not, and, or */
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#include <sysexits.h> /* EX_OSERR, EX_USAGE,
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EX_UNAVAILABLE */
67
#include <stdint.h> /* SIZE_MAX */
68
#include <dirent.h> /* struct dirent, scandir(),
69
alphasort() */
70
#include <inttypes.h> /* uintmax_t, strtoumax(), SCNuMAX,
71
PRIuMAX */
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#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK() */
73
#include <fcntl.h> /* open(), O_RDONLY */
52
#include <errno.h> /* TEMP_FAILURE_RETRY */
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#include <argz.h> /* argz_count(), argz_extract() */
54
#include <stdarg.h> /* va_list, va_start(), ... */
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55
76
56
sig_atomic_t interrupted_by_signal = 0;
77
const char *argp_program_version = "plymouth " VERSION;
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const char *argp_program_bug_address = "<mandos@recompile.se>";
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57
80
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/* Used by Ubuntu 11.04 (Natty Narwahl) */
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const char plymouth_old_old_pid[] = "/dev/.initramfs/plymouth.pid";
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const char plymouth_old_pid[] = "/dev/.initramfs/plymouth.pid";
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/* Used by Ubuntu 11.10 (Oneiric Ocelot) */
83
const char plymouth_old_pid[] = "/run/initramfs/plymouth.pid";
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/* Used by Debian 9 (stretch) */
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const char plymouth_pid[] = "/run/plymouth/pid";
61
const char plymouth_pid[] = "/run/initramfs/plymouth.pid";
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const char plymouth_path[] = "/bin/plymouth";
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const char plymouthd_path[] = "/sbin/plymouthd";
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66
"--mode=boot",
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"--attach-to-session",
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68
NULL };
93
bool debug = false;
94
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95
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static void termination_handler(__attribute__((unused))int signum){
96
71
if(interrupted_by_signal){
99
74
interrupted_by_signal = 1;
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75
}
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__attribute__((format (gnu_printf, 2, 3), nonnull))
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int fprintf_plus(FILE *stream, const char *format, ...){
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va_list ap;
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va_start (ap, format);
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fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name);
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return vfprintf(stream, format, ap);
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}
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/* Function to use when printing errors */
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__attribute__((format (gnu_printf, 3, 4)))
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void error_plus(int status, int errnum, const char *formatstring,
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__attribute__((nonnull (2, 3)))
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bool exec_and_wait(pid_t *pid_return, const char *path,
192
const char * const * const argv, bool interruptable,
159
const char * const *argv, bool interruptable,
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160
bool daemonize){
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int status;
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int ret;
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pid_t pid;
197
if(debug){
198
for(const char * const *arg = argv; *arg != NULL; arg++){
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fprintf_plus(stderr, "exec_and_wait arg: %s\n", *arg);
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}
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fprintf_plus(stderr, "exec_and_wait end of args\n");
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}
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pid = fork();
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if(pid == -1){
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error_plus(0, errno, "fork");
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}
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char **tmp;
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int i = 0;
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for (; argv[i] != NULL; i++){
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#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
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tmp = reallocarray(new_argv, ((size_t)i + 2),
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sizeof(const char *));
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#else
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if(((size_t)i + 2) > (SIZE_MAX / sizeof(const char *))){
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/* overflow */
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tmp = NULL;
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errno = ENOMEM;
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} else {
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tmp = realloc(new_argv, ((size_t)i + 2) * sizeof(const char *));
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}
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#endif
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for (; argv[i]!=NULL; i++){
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tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 2));
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if(tmp == NULL){
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error_plus(0, errno, "reallocarray");
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error_plus(0, errno, "realloc");
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free(new_argv);
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_exit(EX_OSERR);
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}
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and ((not interrupted_by_signal)
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or (not interruptable)));
259
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if(interrupted_by_signal and interruptable){
260
if(debug){
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fprintf_plus(stderr, "Interrupted by signal\n");
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}
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return false;
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}
265
211
if(ret == -1){
266
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error_plus(0, errno, "waitpid");
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return false;
268
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}
269
if(debug){
270
if(WIFEXITED(status)){
271
fprintf_plus(stderr, "exec_and_wait exited: %d\n",
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WEXITSTATUS(status));
273
} else if(WIFSIGNALED(status)) {
274
fprintf_plus(stderr, "exec_and_wait signaled: %d\n",
275
WTERMSIG(status));
276
}
277
}
278
215
if(WIFEXITED(status) and (WEXITSTATUS(status) == 0)){
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return true;
280
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}
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}
345
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/* Try the old pid file location */
346
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if(proc_id == 0){
347
pidfile = fopen(plymouth_old_pid, "r");
348
if(pidfile != NULL){
349
ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
350
if(ret != 1){
351
proc_id = 0;
352
}
353
fclose(pidfile);
354
}
355
}
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/* Try the old old pid file location */
357
if(proc_id == 0){
358
pidfile = fopen(plymouth_old_old_pid, "r");
284
pidfile = fopen(plymouth_pid, "r");
359
285
if(pidfile != NULL){
360
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ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
361
287
if(ret != 1){
372
298
error_plus(0, errno, "scandir");
373
299
}
374
300
if(ret > 0){
375
const int num_entries = ret;
376
for(int i = 0; i < num_entries; i++){
377
if(proc_id == 0){
378
ret = sscanf(direntries[i]->d_name, "%" SCNuMAX, &proc_id);
379
if(ret < 0){
380
error_plus(0, errno, "sscanf");
381
}
382
}
383
free(direntries[i]);
301
ret = sscanf(direntries[0]->d_name, "%" SCNuMAX, &proc_id);
302
if(ret < 0){
303
error_plus(0, errno, "sscanf");
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}
385
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}
386
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/* scandir might preallocate for this variable (man page unclear).
396
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return 0;
397
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}
398
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399
char **getargv(pid_t pid){
319
const char * const * getargv(pid_t pid){
400
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int cl_fd;
401
321
char *cmdline_filename;
402
322
ssize_t sret;
463
383
return NULL;
464
384
}
465
385
argz_extract(cmdline, cmdline_len, argv); /* Create argv */
466
return argv;
386
return (const char * const *)argv;
467
387
}
468
388
469
389
int main(__attribute__((unused))int argc,
470
390
__attribute__((unused))char **argv){
471
char *prompt = NULL;
391
char *prompt;
472
392
char *prompt_arg;
473
393
pid_t plymouth_command_pid;
474
394
int ret;
475
395
bool bret;
476
396
477
{
478
struct argp_option options[] = {
479
{ .name = "prompt", .key = 128, .arg = "PROMPT",
480
.doc = "The prompt to show" },
481
{ .name = "debug", .key = 129,
482
.doc = "Debug mode" },
483
{ .name = NULL }
484
};
485
486
__attribute__((nonnull(3)))
487
error_t parse_opt (int key, char *arg, __attribute__((unused))
488
struct argp_state *state){
489
errno = 0;
490
switch (key){
491
case 128: /* --prompt */
492
prompt = arg;
493
if(debug){
494
fprintf_plus(stderr, "Custom prompt \"%s\"\n", prompt);
495
}
496
break;
497
case 129: /* --debug */
498
debug = true;
499
break;
500
default:
501
return ARGP_ERR_UNKNOWN;
502
}
503
return errno;
504
}
505
506
struct argp argp = { .options = options, .parser = parse_opt,
507
.args_doc = "",
508
.doc = "Mandos plymouth -- Read and"
509
" output a password" };
510
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, NULL, NULL);
511
switch(ret){
512
case 0:
513
break;
514
case ENOMEM:
515
default:
516
errno = ret;
517
error_plus(0, errno, "argp_parse");
518
return EX_OSERR;
519
case EINVAL:
520
error_plus(0, errno, "argp_parse");
521
return EX_USAGE;
522
}
523
}
524
525
397
/* test -x /bin/plymouth */
526
398
ret = access(plymouth_path, X_OK);
527
399
if(ret == -1){
528
400
/* Plymouth is probably not installed. Don't print an error
529
401
message, just exit. */
530
if(debug){
531
fprintf_plus(stderr, "Plymouth (%s) not found\n",
532
plymouth_path);
533
}
534
402
exit(EX_UNAVAILABLE);
535
403
}
536
404
570
438
}
571
439
/* Plymouth is probably not running. Don't print an error
572
440
message, just exit. */
573
if(debug){
574
fprintf_plus(stderr, "Plymouth not running\n");
575
}
576
441
exit(EX_UNAVAILABLE);
577
442
}
578
443
579
if(prompt != NULL){
580
ret = asprintf(&prompt_arg, "--prompt=%s", prompt);
581
} else {
582
char *made_prompt = makeprompt();
583
ret = asprintf(&prompt_arg, "--prompt=%s", made_prompt);
584
free(made_prompt);
585
}
444
prompt = makeprompt();
445
ret = asprintf(&prompt_arg, "--prompt=%s", prompt);
446
free(prompt);
586
447
if(ret == -1){
587
448
error_plus(EX_OSERR, errno, "asprintf");
588
449
}
589
450
590
451
/* plymouth ask-for-password --prompt="$prompt" */
591
if(debug){
592
fprintf_plus(stderr, "Prompting for password via Plymouth\n");
593
}
594
452
bret = exec_and_wait(&plymouth_command_pid,
595
453
plymouth_path, (const char *[])
596
454
{ plymouth_path, "ask-for-password",
606
464
}
607
465
kill_and_wait(plymouth_command_pid);
608
466
609
char **plymouthd_argv = NULL;
467
const char * const *plymouthd_argv;
610
468
pid_t pid = get_pid();
611
469
if(pid == 0){
612
470
error_plus(0, 0, "plymouthd pid not found");
471
plymouthd_argv = plymouthd_default_argv;
613
472
} else {
614
473
plymouthd_argv = getargv(pid);
615
474
}
618
477
{ plymouth_path, "quit", NULL },
619
478
false, false);
620
479
if(not bret){
621
if(plymouthd_argv != NULL){
622
free(*plymouthd_argv);
623
free(plymouthd_argv);
624
}
625
480
exit(EXIT_FAILURE);
626
481
}
627
bret = exec_and_wait(NULL, plymouthd_path,
628
(plymouthd_argv != NULL)
629
? (const char * const *)plymouthd_argv
630
: plymouthd_default_argv,
482
bret = exec_and_wait(NULL, plymouthd_path, plymouthd_argv,
631
483
false, true);
632
if(plymouthd_argv != NULL){
633
free(*plymouthd_argv);
634
free(plymouthd_argv);
635
}
636
484
if(not bret){
637
485
exit(EXIT_FAILURE);
638
486
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0