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- Committer: Teddy Hogeborn
- Date: 2008-09-01 16:19:32 UTC
- Revision ID: teddy@fukt.bsnet.se-20080901161932-ostp7tulh9aijulh
* plugin-runner.c (add_environment): Never insert existing environment
variables.
(main): Rename "--global-envs" to "--global-env" and "--envs-for" to
"--env-for".
* plugin-runner.xml (SYNOPSIS): Rename "--global-envs" to
"--global-env" and "--envs-for" to
"--env-for".
(OPTIONS): Added "--global-env" and "--env-for".
(FALLBACK): Add id attribute.
(EXIT STATUS): Add text.
(ENVIRONMENT): New section.
(FILES): Document configuration file.
variables.
(main): Rename "--global-envs" to "--global-env" and "--envs-for" to
"--env-for".
* plugin-runner.xml (SYNOPSIS): Rename "--global-envs" to
"--global-env" and "--envs-for" to
"--env-for".
(OPTIONS): Added "--global-env" and "--env-for".
(FALLBACK): Add id attribute.
(EXIT STATUS): Add text.
(ENVIRONMENT): New section.
(FILES): Document configuration file.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
21
20
*
22
* Contact the authors at <mandos@recompile.se>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
23
22
*/
24
23
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
25
asprintf() */
27
26
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
36
35
uid_t, gid_t, getuid(), getgid(),
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
40
WEXITSTATUS() */
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
53
51
close() */
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
53
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
SIG_UNBLOCK, kill() */
69
65
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
75
66
76
67
#define BUFFER_SIZE 256
77
68
78
69
#define PDIR "/lib/mandos/plugins.d"
79
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
71
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
struct plugin;
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
104
97
static plugin *plugin_list = NULL;
105
98
106
/* Gets an existing plugin based on name,
99
/* Gets a existing plugin based on name,
107
100
or if none is found, creates a new one */
108
101
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
113
106
return p;
114
107
}
115
108
}
116
109
/* Create a new plugin */
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
122
112
return NULL;
123
113
}
124
114
char *copy_name = NULL;
125
115
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
129
117
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
118
return NULL;
134
119
}
135
120
}
136
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
141
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
146
int e = errno;
121
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
126
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
147
129
free(copy_name);
148
130
free(new_plugin);
149
errno = e;
150
131
return NULL;
151
132
}
152
133
new_plugin->argv[0] = copy_name;
153
134
new_plugin->argv[1] = NULL;
154
135
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
136
new_plugin->environ = malloc(sizeof(char *));
158
137
if(new_plugin->environ == NULL){
159
int e = errno;
160
138
free(copy_name);
161
139
free(new_plugin->argv);
162
140
free(new_plugin);
163
errno = e;
164
141
return NULL;
165
142
}
166
143
new_plugin->environ[0] = NULL;
171
148
}
172
149
173
150
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
175
151
static bool add_to_char_array(const char *new, char ***array,
176
152
int *len){
177
153
/* Resize the pointed-to array to hold one more pointer */
178
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
182
156
/* Malloc check */
183
157
if(*array == NULL){
184
158
return false;
185
159
}
186
160
/* Make a copy of the new string */
187
char *copy;
188
do {
189
copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
191
162
if(copy == NULL){
192
163
return false;
193
164
}
200
171
}
201
172
202
173
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
204
174
static bool add_argument(plugin *p, const char *arg){
205
175
if(p == NULL){
206
176
return false;
209
179
}
210
180
211
181
/* Add to a plugin's environment */
212
__attribute__((nonnull(2)))
213
static bool add_environment(plugin *p, const char *def, bool replace){
182
static bool add_environment(plugin *p, const char *def){
214
183
if(p == NULL){
215
184
return false;
216
185
}
218
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
219
188
/* Search for this environment variable */
220
189
for(char **e = p->environ; *e != NULL; e++){
221
if(strncmp(*e, def, namelen + 1) == 0){
222
/* It already exists */
223
if(replace){
224
char *new;
225
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
228
if(new == NULL){
229
return false;
230
}
231
*e = new;
232
strcpy(*e, def);
233
}
190
if(strncmp(*e, def, namelen+1) == 0){
191
/* Refuse to add an existing variable */
234
192
return true;
235
193
}
236
194
}
240
198
/*
241
199
* Based on the example in the GNU LibC manual chapter 13.13 "File
242
200
* Descriptor Flags".
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
201
* *Note File Descriptor Flags:(libc)Descriptor Flags.
244
202
*/
245
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
203
static int set_cloexec_flag(int fd)
204
{
205
int ret = fcntl(fd, F_GETFD, 0);
247
206
/* If reading the flags failed, return error indication now. */
248
207
if(ret < 0){
249
208
return ret;
250
209
}
251
210
/* Store modified flag word in the descriptor. */
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
211
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
212
}
255
213
256
214
257
215
/* Mark processes as completed when they exit, and save their exit
258
216
status. */
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
217
void handle_sigchld(__attribute__((unused)) int sig){
261
218
while(true){
262
219
plugin *proc = plugin_list;
263
220
int status;
267
224
break;
268
225
}
269
226
if(pid == -1){
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
227
if (errno != ECHILD){
228
perror("waitpid");
273
229
}
274
error(0, errno, "waitpid");
230
/* No child processes */
231
break;
275
232
}
276
233
277
234
/* A child exited, find it in process_list */
278
235
while(proc != NULL and proc->pid != pid){
279
236
proc = proc->next;
283
240
continue;
284
241
}
285
242
proc->status = status;
286
proc->completed = 1;
243
proc->completed = true;
287
244
}
288
errno = old_errno;
289
245
}
290
246
291
247
/* Prints out a password to stdout */
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
248
bool print_out_password(const char *buffer, size_t length){
294
249
ssize_t ret;
250
if(length>0 and buffer[length-1] == '\n'){
251
length--;
252
}
295
253
for(size_t written = 0; written < length; written += (size_t)ret){
296
254
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
297
255
length - written));
303
261
}
304
262
305
263
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
307
264
static void free_plugin(plugin *plugin_node){
308
265
309
266
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
315
272
}
316
273
free(plugin_node->environ);
317
274
free(plugin_node->buffer);
318
275
319
276
/* Removes the plugin from the singly-linked list */
320
277
if(plugin_node == plugin_list){
321
278
/* First one - simple */
349
306
struct stat st;
350
307
fd_set rfds_all;
351
308
int ret, maxfd = 0;
352
ssize_t sret;
353
309
uid_t uid = 65534;
354
310
gid_t gid = 65534;
355
311
bool debug = false;
364
320
sigemptyset(&sigchld_action.sa_mask);
365
321
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
366
322
if(ret == -1){
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
323
perror("sigaddset");
324
exitstatus = EXIT_FAILURE;
369
325
goto fallback;
370
326
}
371
327
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
372
328
if(ret == -1){
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
329
perror("sigaction");
330
exitstatus = EXIT_FAILURE;
375
331
goto fallback;
376
332
}
377
333
380
336
{ .name = "global-options", .key = 'g',
381
337
.arg = "OPTION[,OPTION[,...]]",
382
338
.doc = "Options passed to all plugins" },
383
{ .name = "global-env", .key = 'G',
339
{ .name = "global-env", .key = 'e',
384
340
.arg = "VAR=value",
385
341
.doc = "Environment variable passed to all plugins" },
386
342
{ .name = "options-for", .key = 'o',
387
343
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
388
344
.doc = "Options passed only to specified plugin" },
389
{ .name = "env-for", .key = 'E',
345
{ .name = "env-for", .key = 'f',
390
346
.arg = "PLUGIN:ENV=value",
391
347
.doc = "Environment variable passed to specified plugin" },
392
348
{ .name = "disable", .key = 'd',
393
349
.arg = "PLUGIN",
394
350
.doc = "Disable a specific plugin", .group = 1 },
395
{ .name = "enable", .key = 'e',
396
.arg = "PLUGIN",
397
.doc = "Enable a specific plugin", .group = 1 },
398
351
{ .name = "plugin-dir", .key = 128,
399
352
.arg = "DIRECTORY",
400
353
.doc = "Specify a different plugin directory", .group = 2 },
409
362
.doc = "Group ID the plugins will run as", .group = 3 },
410
363
{ .name = "debug", .key = 132,
411
364
.doc = "Debug mode", .group = 4 },
412
/*
413
* These reproduce what we would get without ARGP_NO_HELP
414
*/
415
{ .name = "help", .key = '?',
416
.doc = "Give this help list", .group = -1 },
417
{ .name = "usage", .key = -3,
418
.doc = "Give a short usage message", .group = -1 },
419
{ .name = "version", .key = 'V',
420
.doc = "Print program version", .group = -1 },
421
365
{ .name = NULL }
422
366
};
423
367
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
426
errno = 0;
427
switch(key){
428
char *tmp;
429
intmax_t tmp_id;
368
error_t parse_opt (int key, char *arg, __attribute__((unused))
369
struct argp_state *state) {
370
/* Get the INPUT argument from `argp_parse', which we know is a
371
pointer to our plugin list pointer. */
372
switch (key) {
430
373
case 'g': /* --global-options */
374
if (arg != NULL){
375
char *p;
376
while((p = strsep(&arg, ",")) != NULL){
377
if(p[0] == '\0'){
378
continue;
379
}
380
if(not add_argument(getplugin(NULL), p)){
381
perror("add_argument");
382
return ARGP_ERR_UNKNOWN;
383
}
384
}
385
}
386
break;
387
case 'e': /* --global-env */
388
if(arg == NULL){
389
break;
390
}
431
391
{
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
436
}
392
char *envdef = strdup(arg);
393
if(envdef == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), envdef)){
397
perror("add_environment");
437
398
}
438
399
}
439
400
break;
440
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
442
break;
443
401
case 'o': /* --options-for */
444
{
445
char *option_list = strchr(arg, ':');
446
if(option_list == NULL){
447
argp_error(state, "No colon in \"%s\"", arg);
448
errno = EINVAL;
449
break;
450
}
451
*option_list = '\0';
452
option_list++;
453
if(arg[0] == '\0'){
454
argp_error(state, "Empty plugin name");
455
errno = EINVAL;
456
break;
457
}
458
char *option;
459
while((option = strsep(&option_list, ",")) != NULL){
460
if(not add_argument(getplugin(arg), option)){
461
break;
402
if (arg != NULL){
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0'){
405
break;
406
}
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0'){
409
break;
410
}
411
if(opt != NULL){
412
char *p;
413
while((p = strsep(&opt, ",")) != NULL){
414
if(p[0] == '\0'){
415
continue;
416
}
417
if(not add_argument(getplugin(p_name), p)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
420
}
462
421
}
463
422
}
464
423
}
465
424
break;
466
case 'E': /* --env-for */
425
case 'f': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
467
429
{
468
430
char *envdef = strchr(arg, ':');
469
431
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
break;
473
}
474
*envdef = '\0';
432
break;
433
}
434
char *p_name = strndup(arg, (size_t) (envdef-arg));
435
if(p_name == NULL){
436
break;
437
}
475
438
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
439
if(not add_environment(getplugin(p_name), envdef)){
440
perror("add_environment");
480
441
}
481
add_environment(getplugin(arg), envdef, true);
482
442
}
483
443
break;
484
444
case 'd': /* --disable */
485
{
486
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = true;
489
}
490
}
491
break;
492
case 'e': /* --enable */
493
{
494
plugin *p = getplugin(arg);
495
if(p != NULL){
496
p->disabled = false;
497
}
445
if (arg != NULL){
446
plugin *p = getplugin(arg);
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
449
}
450
p->disabled = true;
498
451
}
499
452
break;
500
453
case 128: /* --plugin-dir */
501
free(plugindir);
502
454
plugindir = strdup(arg);
455
if(plugindir == NULL){
456
perror("strdup");
457
}
503
458
break;
504
459
case 129: /* --config-file */
505
/* This is already done by parse_opt_config_file() */
506
break;
460
argfile = strdup(arg);
461
if(argfile == NULL){
462
perror("strdup");
463
}
464
break;
507
465
case 130: /* --userid */
508
tmp_id = strtoimax(arg, &tmp, 10);
509
if(errno != 0 or tmp == arg or *tmp != '\0'
510
or tmp_id != (uid_t)tmp_id){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
513
break;
514
}
515
uid = (uid_t)tmp_id;
466
uid = (uid_t)strtol(arg, NULL, 10);
516
467
break;
517
468
case 131: /* --groupid */
518
tmp_id = strtoimax(arg, &tmp, 10);
519
if(errno != 0 or tmp == arg or *tmp != '\0'
520
or tmp_id != (gid_t)tmp_id){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
523
break;
524
}
525
gid = (gid_t)tmp_id;
469
gid = (gid_t)strtol(arg, NULL, 10);
526
470
break;
527
471
case 132: /* --debug */
528
472
debug = true;
529
473
break;
530
/*
531
* These reproduce what we would get without ARGP_NO_HELP
532
*/
533
case '?': /* --help */
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
536
case -3: /* --usage */
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
argp_state_help(state, state->out_stream,
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
540
case 'V': /* --version */
541
fprintf(state->out_stream, "%s\n", argp_program_version);
542
exit(EXIT_SUCCESS);
543
break;
544
/*
545
* When adding more options before this line, remember to also add a
546
* "case" to the "parse_opt_config_file" function below.
547
*/
548
case ARGP_KEY_ARG:
549
/* Cryptsetup always passes an argument, which is an empty
550
string if "none" was specified in /etc/crypttab. So if
551
argument was empty, we ignore it silently. */
552
if(arg[0] == '\0'){
553
break;
554
}
555
default:
556
return ARGP_ERR_UNKNOWN;
557
}
558
return errno; /* Set to 0 at start */
559
}
560
561
/* This option parser is the same as parse_opt() above, except it
562
ignores everything but the --config-file option. */
563
error_t parse_opt_config_file(int key, char *arg,
564
__attribute__((unused))
565
struct argp_state *state){
566
errno = 0;
567
switch(key){
568
case 'g': /* --global-options */
569
case 'G': /* --global-env */
570
case 'o': /* --options-for */
571
case 'E': /* --env-for */
572
case 'd': /* --disable */
573
case 'e': /* --enable */
574
case 128: /* --plugin-dir */
575
break;
576
case 129: /* --config-file */
577
free(argfile);
578
argfile = strdup(arg);
579
break;
580
case 130: /* --userid */
581
case 131: /* --groupid */
582
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
586
case ARGP_KEY_ARG:
587
break;
588
default:
589
return ARGP_ERR_UNKNOWN;
590
}
591
return errno;
592
}
593
594
struct argp argp = { .options = options,
595
.parser = parse_opt_config_file,
596
.args_doc = "",
474
case ARGP_KEY_ARG:
475
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
476
break;
477
case ARGP_KEY_END:
478
break;
479
default:
480
return ARGP_ERR_UNKNOWN;
481
}
482
return 0;
483
}
484
485
struct argp argp = { .options = options, .parser = parse_opt,
486
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
597
487
.doc = "Mandos plugin runner -- Run plugins" };
598
488
599
/* Parse using parse_opt_config_file() in order to get the custom
600
config file location, if any. */
601
ret = argp_parse(&argp, argc, argv,
602
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
603
NULL, NULL);
604
switch(ret){
605
case 0:
606
break;
607
case ENOMEM:
608
default:
609
errno = ret;
610
error(0, errno, "argp_parse");
611
exitstatus = EX_OSERR;
612
goto fallback;
613
case EINVAL:
614
exitstatus = EX_USAGE;
489
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
490
if (ret == ARGP_ERR_UNKNOWN){
491
fprintf(stderr, "Unknown error while parsing arguments\n");
492
exitstatus = EXIT_FAILURE;
615
493
goto fallback;
616
494
}
617
618
/* Reset to the normal argument parser */
619
argp.parser = parse_opt;
620
621
/* Open the configfile if available */
622
if(argfile == NULL){
495
496
/* Opens the configfile if aviable */
497
if (argfile == NULL){
623
498
conffp = fopen(AFILE, "r");
624
499
} else {
625
500
conffp = fopen(argfile, "r");
626
}
501
}
627
502
if(conffp != NULL){
628
503
char *org_line = NULL;
629
504
char *p, *arg, *new_arg, *line;
630
505
size_t size = 0;
506
ssize_t sret;
631
507
const char whitespace_delims[] = " \r\t\f\v\n";
632
508
const char comment_delim[] = "#";
633
509
634
510
custom_argc = 1;
635
511
custom_argv = malloc(sizeof(char*) * 2);
636
512
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
513
perror("malloc");
514
exitstatus = EXIT_FAILURE;
639
515
goto fallback;
640
516
}
641
517
custom_argv[0] = argv[0];
642
518
custom_argv[1] = NULL;
643
519
644
520
/* for each line in the config file, strip whitespace and ignore
645
521
commented text */
646
522
while(true){
648
524
if(sret == -1){
649
525
break;
650
526
}
651
527
652
528
line = org_line;
653
529
arg = strsep(&line, comment_delim);
654
530
while((p = strsep(&arg, whitespace_delims)) != NULL){
657
533
}
658
534
new_arg = strdup(p);
659
535
if(new_arg == NULL){
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
536
perror("strdup");
537
exitstatus = EXIT_FAILURE;
662
538
free(org_line);
663
539
goto fallback;
664
540
}
667
543
custom_argv = realloc(custom_argv, sizeof(char *)
668
544
* ((unsigned int) custom_argc + 1));
669
545
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
546
perror("realloc");
547
exitstatus = EXIT_FAILURE;
672
548
free(org_line);
673
549
goto fallback;
674
550
}
675
551
custom_argv[custom_argc-1] = new_arg;
676
custom_argv[custom_argc] = NULL;
552
custom_argv[custom_argc] = NULL;
677
553
}
678
554
}
679
do {
680
ret = fclose(conffp);
681
} while(ret == EOF and errno == EINTR);
682
if(ret == EOF){
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
685
goto fallback;
686
}
687
555
free(org_line);
688
} else {
556
} else{
689
557
/* Check for harmful errors and go to fallback. Other errors might
690
558
not affect opening plugins */
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
559
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
560
perror("fopen");
561
exitstatus = EXIT_FAILURE;
694
562
goto fallback;
695
563
}
696
564
}
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
565
/* If there was any arguments from configuration file,
566
pass them to parser as command arguments */
699
567
if(custom_argv != NULL){
700
ret = argp_parse(&argp, custom_argc, custom_argv,
701
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
702
NULL, NULL);
703
switch(ret){
704
case 0:
705
break;
706
case ENOMEM:
707
default:
708
errno = ret;
709
error(0, errno, "argp_parse");
710
exitstatus = EX_OSERR;
711
goto fallback;
712
case EINVAL:
713
exitstatus = EX_CONFIG;
568
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
569
if (ret == ARGP_ERR_UNKNOWN){
570
fprintf(stderr, "Unknown error while parsing arguments\n");
571
exitstatus = EXIT_FAILURE;
714
572
goto fallback;
715
573
}
716
574
}
717
575
718
/* Parse actual command line arguments, to let them override the
719
config file */
720
ret = argp_parse(&argp, argc, argv,
721
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
722
NULL, NULL);
723
switch(ret){
724
case 0:
725
break;
726
case ENOMEM:
727
default:
728
errno = ret;
729
error(0, errno, "argp_parse");
730
exitstatus = EX_OSERR;
731
goto fallback;
732
case EINVAL:
733
exitstatus = EX_USAGE;
734
goto fallback;
735
}
736
737
576
if(debug){
738
577
for(plugin *p = plugin_list; p != NULL; p=p->next){
739
578
fprintf(stderr, "Plugin: %s has %d arguments\n",
741
580
for(char **a = p->argv; *a != NULL; a++){
742
581
fprintf(stderr, "\tArg: %s\n", *a);
743
582
}
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
583
fprintf(stderr, "...and %u environment variables\n", p->envc);
745
584
for(char **a = p->environ; *a != NULL; a++){
746
585
fprintf(stderr, "\t%s\n", *a);
747
586
}
748
587
}
749
588
}
750
751
if(getuid() == 0){
752
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
if(plugindir_fd == -1){
756
error(0, errno, "open");
757
} else {
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
759
if(ret == -1){
760
error(0, errno, "fstat");
761
} else {
762
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
763
ret = fchown(plugindir_fd, uid, gid);
764
if(ret == -1){
765
error(0, errno, "fchown");
766
}
767
}
768
}
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
770
}
771
}
772
773
/* Lower permissions */
774
ret = setgid(gid);
775
if(ret == -1){
776
error(0, errno, "setgid");
777
}
589
590
/* Strip permissions down to nobody */
778
591
ret = setuid(uid);
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
592
if (ret == -1){
593
perror("setuid");
594
}
595
setgid(gid);
596
if (ret == -1){
597
perror("setgid");
598
}
599
600
if (plugindir == NULL){
601
dir = opendir(PDIR);
602
} else {
603
dir = opendir(plugindir);
604
}
605
606
if(dir == NULL){
607
perror("Could not open plugin dir");
608
exitstatus = EXIT_FAILURE;
609
goto fallback;
610
}
611
612
/* Set the FD_CLOEXEC flag on the directory, if possible */
784
613
{
785
int dir_fd = -1;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
788
#ifdef O_CLOEXEC
789
O_CLOEXEC
790
#else /* not O_CLOEXEC */
791
0
792
#endif /* not O_CLOEXEC */
793
);
794
} else {
795
dir_fd = open(plugindir, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
}
803
if(dir_fd == -1){
804
error(0, errno, "Could not open plugin dir");
805
exitstatus = EX_UNAVAILABLE;
806
goto fallback;
807
}
808
809
#ifndef O_CLOEXEC
810
/* Set the FD_CLOEXEC flag on the directory */
811
ret = set_cloexec_flag(dir_fd);
812
if(ret < 0){
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
exitstatus = EX_OSERR;
816
goto fallback;
817
}
818
#endif /* O_CLOEXEC */
819
820
dir = fdopendir(dir_fd);
821
if(dir == NULL){
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
825
goto fallback;
614
int dir_fd = dirfd(dir);
615
if(dir_fd >= 0){
616
ret = set_cloexec_flag(dir_fd);
617
if(ret < 0){
618
perror("set_cloexec_flag");
619
exitstatus = EXIT_FAILURE;
620
goto fallback;
621
}
826
622
}
827
623
}
828
624
829
625
FD_ZERO(&rfds_all);
830
626
831
627
/* Read and execute any executable in the plugin directory*/
832
628
while(true){
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
629
dirst = readdir(dir);
836
630
837
/* All directory entries have been processed */
631
// All directory entries have been processed
838
632
if(dirst == NULL){
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
633
if (errno == EBADF){
634
perror("readdir");
635
exitstatus = EXIT_FAILURE;
842
636
goto fallback;
843
637
}
844
638
break;
846
640
847
641
d_name_len = strlen(dirst->d_name);
848
642
849
/* Ignore dotfiles, backup files and other junk */
643
// Ignore dotfiles, backup files and other junk
850
644
{
851
645
bool bad_name = false;
852
646
854
648
855
649
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
856
650
".dpkg-old",
857
".dpkg-bak",
858
651
".dpkg-divert", NULL };
859
652
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
860
653
size_t pre_len = strlen(*pre);
874
667
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
875
668
size_t suf_len = strlen(*suf);
876
669
if((d_name_len >= suf_len)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
670
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
878
671
== 0)){
879
672
if(debug){
880
673
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
682
continue;
890
683
}
891
684
}
892
685
893
686
char *filename;
894
if(plugindir == NULL){
895
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
896
dirst->d_name));
897
} else {
898
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
899
plugindir,
900
dirst->d_name));
901
}
687
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
902
688
if(ret < 0){
903
error(0, errno, "asprintf");
689
perror("asprintf");
904
690
continue;
905
691
}
906
692
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
908
if(ret == -1){
909
error(0, errno, "stat");
693
ret = stat(filename, &st);
694
if (ret == -1){
695
perror("stat");
910
696
free(filename);
911
697
continue;
912
698
}
913
699
914
700
/* Ignore non-executable files */
915
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
701
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
917
702
if(debug){
918
703
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
704
" with bad type or mode\n", filename);
924
709
925
710
plugin *p = getplugin(dirst->d_name);
926
711
if(p == NULL){
927
error(0, errno, "getplugin");
712
perror("getplugin");
928
713
free(filename);
929
714
continue;
930
715
}
942
727
if(g != NULL){
943
728
for(char **a = g->argv + 1; *a != NULL; a++){
944
729
if(not add_argument(p, *a)){
945
error(0, errno, "add_argument");
730
perror("add_argument");
946
731
}
947
732
}
948
733
/* Add global environment variables */
949
734
for(char **e = g->environ; *e != NULL; e++){
950
if(not add_environment(p, *e, false)){
951
error(0, errno, "add_environment");
735
if(not add_environment(p, *e)){
736
perror("add_environment");
952
737
}
953
738
}
954
739
}
958
743
process, too. */
959
744
if(p->environ[0] != NULL){
960
745
for(char **e = environ; *e != NULL; e++){
961
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
746
char *copy = strdup(*e);
747
if(copy == NULL){
748
perror("strdup");
749
continue;
750
}
751
if(not add_environment(p, copy)){
752
perror("add_environment");
963
753
}
964
754
}
965
755
}
966
756
967
757
int pipefd[2];
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
969
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
758
ret = pipe(pipefd);
759
if (ret == -1){
760
perror("pipe");
761
exitstatus = EXIT_FAILURE;
972
762
goto fallback;
973
763
}
974
764
/* Ask OS to automatic close the pipe on exec */
975
765
ret = set_cloexec_flag(pipefd[0]);
976
766
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
767
perror("set_cloexec_flag");
768
exitstatus = EXIT_FAILURE;
979
769
goto fallback;
980
770
}
981
771
ret = set_cloexec_flag(pipefd[1]);
982
772
if(ret < 0){
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
985
775
goto fallback;
986
776
}
987
777
/* Block SIGCHLD until process is safely in process list */
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
&sigchld_action.sa_mask,
990
NULL));
778
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
991
779
if(ret < 0){
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
780
perror("sigprocmask");
781
exitstatus = EXIT_FAILURE;
994
782
goto fallback;
995
783
}
996
/* Starting a new process to be watched */
997
pid_t pid;
998
do {
999
pid = fork();
1000
} while(pid == -1 and errno == EINTR);
784
// Starting a new process to be watched
785
pid_t pid = fork();
1001
786
if(pid == -1){
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
787
perror("fork");
788
exitstatus = EXIT_FAILURE;
1004
789
goto fallback;
1005
790
}
1006
791
if(pid == 0){
1007
792
/* this is the child process */
1008
793
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1009
794
if(ret < 0){
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
795
perror("sigaction");
796
_exit(EXIT_FAILURE);
1012
797
}
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
798
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1014
799
if(ret < 0){
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
800
perror("sigprocmask");
801
_exit(EXIT_FAILURE);
1017
802
}
1018
803
1019
804
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1020
805
if(ret == -1){
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
806
perror("dup2");
807
_exit(EXIT_FAILURE);
1023
808
}
1024
809
1025
810
if(dirfd(dir) < 0){
1029
814
}
1030
815
if(p->environ[0] == NULL){
1031
816
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
817
perror("execv");
818
_exit(EXIT_FAILURE);
1034
819
}
1035
820
} else {
1036
821
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
822
perror("execve");
823
_exit(EXIT_FAILURE);
1039
824
}
1040
825
}
1041
826
/* no return */
1042
827
}
1043
828
/* Parent process */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
829
close(pipefd[1]); /* Close unused write end of pipe */
1046
830
free(filename);
1047
831
plugin *new_plugin = getplugin(dirst->d_name);
1048
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1052
NULL)));
832
if (new_plugin == NULL){
833
perror("getplugin");
834
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1053
835
if(ret < 0){
1054
error(0, errno, "sigprocmask");
836
perror("sigprocmask");
1055
837
}
1056
exitstatus = EX_OSERR;
838
exitstatus = EXIT_FAILURE;
1057
839
goto fallback;
1058
840
}
1059
841
1062
844
1063
845
/* Unblock SIGCHLD so signal handler can be run if this process
1064
846
has already completed */
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
847
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1068
848
if(ret < 0){
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
849
perror("sigprocmask");
850
exitstatus = EXIT_FAILURE;
1071
851
goto fallback;
1072
852
}
1073
853
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
854
FD_SET(new_plugin->fd, &rfds_all);
1076
855
1077
if(maxfd < new_plugin->fd){
856
if (maxfd < new_plugin->fd){
1078
857
maxfd = new_plugin->fd;
1079
858
}
859
1080
860
}
1081
861
1082
TEMP_FAILURE_RETRY(closedir(dir));
862
closedir(dir);
1083
863
dir = NULL;
1084
free_plugin(getplugin(NULL));
1085
864
1086
865
for(plugin *p = plugin_list; p != NULL; p = p->next){
1087
866
if(p->pid != 0){
1088
867
break;
1093
872
free_plugin_list();
1094
873
}
1095
874
}
1096
875
1097
876
/* Main loop while running plugins exist */
1098
877
while(plugin_list){
1099
878
fd_set rfds = rfds_all;
1100
879
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1101
if(select_ret == -1 and errno != EINTR){
1102
error(0, errno, "select");
1103
exitstatus = EX_OSERR;
880
if (select_ret == -1){
881
perror("select");
882
exitstatus = EXIT_FAILURE;
1104
883
goto fallback;
1105
884
}
1106
885
/* OK, now either a process completed, or something can be read
1107
886
from one of them */
1108
for(plugin *proc = plugin_list; proc != NULL;){
887
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1109
888
/* Is this process completely done? */
1110
if(proc->completed and proc->eof){
889
if(proc->eof and proc->completed){
1111
890
/* Only accept the plugin output if it exited cleanly */
1112
891
if(not WIFEXITED(proc->status)
1113
892
or WEXITSTATUS(proc->status) != 0){
1114
893
/* Bad exit by plugin */
1115
894
1116
895
if(debug){
1117
896
if(WIFEXITED(proc->status)){
1118
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1119
" status %d\n", proc->name,
1120
(intmax_t) (proc->pid),
897
fprintf(stderr, "Plugin %u exited with status %d\n",
898
(unsigned int) (proc->pid),
1121
899
WEXITSTATUS(proc->status));
1122
} else if(WIFSIGNALED(proc->status)){
1123
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1124
" signal %d: %s\n", proc->name,
1125
(intmax_t) (proc->pid),
1126
WTERMSIG(proc->status),
1127
strsignal(WTERMSIG(proc->status)));
900
} else if(WIFSIGNALED(proc->status)) {
901
fprintf(stderr, "Plugin %u killed by signal %d\n",
902
(unsigned int) (proc->pid),
903
WTERMSIG(proc->status));
1128
904
} else if(WCOREDUMP(proc->status)){
1129
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1130
" core\n", proc->name, (intmax_t) (proc->pid));
905
fprintf(stderr, "Plugin %d dumped core\n",
906
(unsigned int) (proc->pid));
1131
907
}
1132
908
}
1133
909
1134
910
/* Remove the plugin */
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1137
911
FD_CLR(proc->fd, &rfds_all);
912
1138
913
/* Block signal while modifying process_list */
1139
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1140
(SIG_BLOCK,
1141
&sigchld_action.sa_mask,
1142
NULL));
914
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1143
915
if(ret < 0){
1144
error(0, errno, "sigprocmask");
1145
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1146
918
goto fallback;
1147
919
}
1148
1149
plugin *next_plugin = proc->next;
1150
920
free_plugin(proc);
1151
proc = next_plugin;
1152
1153
921
/* We are done modifying process list, so unblock signal */
1154
ret = (int)(TEMP_FAILURE_RETRY
1155
(sigprocmask(SIG_UNBLOCK,
1156
&sigchld_action.sa_mask, NULL)));
922
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
923
NULL);
1157
924
if(ret < 0){
1158
error(0, errno, "sigprocmask");
1159
exitstatus = EX_OSERR;
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1160
927
goto fallback;
1161
928
}
1162
929
1163
930
if(plugin_list == NULL){
1164
931
break;
1165
932
}
1166
1167
933
continue;
1168
934
}
1169
935
1170
936
/* This process exited nicely, so print its buffer */
1171
937
1172
938
bool bret = print_out_password(proc->buffer,
1173
939
proc->buffer_length);
1174
940
if(not bret){
1175
error(0, errno, "print_out_password");
1176
exitstatus = EX_IOERR;
941
perror("print_out_password");
942
exitstatus = EXIT_FAILURE;
1177
943
}
1178
944
goto fallback;
1179
945
}
1180
946
1181
947
/* This process has not completed. Does it have any output? */
1182
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1183
warning from
1184
-Wconversion */
948
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1185
949
/* This process had nothing to say at this time */
1186
proc = proc->next;
1187
950
continue;
1188
951
}
1189
952
/* Before reading, make the process' data buffer large enough */
1190
953
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1191
954
proc->buffer = realloc(proc->buffer, proc->buffer_size
1192
955
+ (size_t) BUFFER_SIZE);
1193
if(proc->buffer == NULL){
1194
error(0, errno, "malloc");
1195
exitstatus = EX_OSERR;
956
if (proc->buffer == NULL){
957
perror("malloc");
958
exitstatus = EXIT_FAILURE;
1196
959
goto fallback;
1197
960
}
1198
961
proc->buffer_size += BUFFER_SIZE;
1199
962
}
1200
963
/* Read from the process */
1201
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1202
proc->buffer
1203
+ proc->buffer_length,
1204
BUFFER_SIZE));
1205
if(sret < 0){
964
ret = read(proc->fd, proc->buffer + proc->buffer_length,
965
BUFFER_SIZE);
966
if(ret < 0){
1206
967
/* Read error from this process; ignore the error */
1207
proc = proc->next;
1208
968
continue;
1209
969
}
1210
if(sret == 0){
970
if(ret == 0){
1211
971
/* got EOF */
1212
972
proc->eof = true;
1213
973
} else {
1214
proc->buffer_length += (size_t) sret;
974
proc->buffer_length += (size_t) ret;
1215
975
}
1216
976
}
1217
977
}
1218
1219
978
979
1220
980
fallback:
1221
981
1222
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1223
and exitstatus != EX_OK)){
982
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1224
983
/* Fallback if all plugins failed, none are found or an error
1225
984
occured */
1226
985
bool bret;
1227
986
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1228
987
char *passwordbuffer = getpass("Password: ");
1229
size_t len = strlen(passwordbuffer);
1230
/* Strip trailing newline */
1231
if(len > 0 and passwordbuffer[len-1] == '\n'){
1232
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1233
len--;
1234
}
1235
bret = print_out_password(passwordbuffer, len);
988
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1236
989
if(not bret){
1237
error(0, errno, "print_out_password");
1238
exitstatus = EX_IOERR;
990
perror("print_out_password");
991
exitstatus = EXIT_FAILURE;
1239
992
}
1240
993
}
1241
994
1242
995
/* Restore old signal handler */
1243
996
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1244
997
if(ret == -1){
1245
error(0, errno, "sigaction");
1246
exitstatus = EX_OSERR;
998
perror("sigaction");
999
exitstatus = EXIT_FAILURE;
1247
1000
}
1248
1001
1249
1002
if(custom_argv != NULL){
1250
1003
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1251
1004
free(*arg);
1257
1010
closedir(dir);
1258
1011
}
1259
1012
1260
/* Kill the processes */
1013
/* Free the process list and kill the processes */
1261
1014
for(plugin *p = plugin_list; p != NULL; p = p->next){
1262
1015
if(p->pid != 0){
1263
1016
close(p->fd);
1264
1017
ret = kill(p->pid, SIGTERM);
1265
1018
if(ret == -1 and errno != ESRCH){
1266
1019
/* Set-uid proccesses might not get closed */
1267
error(0, errno, "kill");
1020
perror("kill");
1268
1021
}
1269
1022
}
1270
1023
}
1271
1024
1272
1025
/* Wait for any remaining child processes to terminate */
1273
do {
1026
do{
1274
1027
ret = wait(NULL);
1275
1028
} while(ret >= 0);
1276
1029
if(errno != ECHILD){
1277
error(0, errno, "wait");
1030
perror("wait");
1278
1031
}
1279
1032
1280
1033
free_plugin_list();
1281
1034
1282
1035
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0