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- Committer: Teddy Hogeborn
- Date: 2008-09-01 16:53:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20080901165317-77dccp81zyqimt2j
* plugin-runner.c (add_environment): Override existing environment
variables when asked to do so.
All callers changed.
(main): Removed old argp.args_doc string. Parse argument file
before normal command line arguments. Use ARGP_IN_ORDER
flag in both calls to argp_parse. Do not strdup() strings
to be sent to add_environment().
* plugin-runner.xml (OPTIONS): Document "--global-env" and "--envs-for".
(FILES): Note that the config file is parsed before the command line
options.
variables when asked to do so.
All callers changed.
(main): Removed old argp.args_doc string. Parse argument file
before normal command line arguments. Use ARGP_IN_ORDER
flag in both calls to argp_parse. Do not strdup() strings
to be sent to add_environment().
* plugin-runner.xml (OPTIONS): Document "--global-env" and "--envs-for".
(FILES): Note that the config file is parsed before the command line
options.
- 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
char **new_array = NULL;
179
do {
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
183
156
/* Malloc check */
184
if(new_array == NULL){
157
if(*array == NULL){
185
158
return false;
186
159
}
187
*array = new_array;
188
160
/* Make a copy of the new string */
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
193
162
if(copy == NULL){
194
163
return false;
195
164
}
202
171
}
203
172
204
173
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
206
174
static bool add_argument(plugin *p, const char *arg){
207
175
if(p == NULL){
208
176
return false;
211
179
}
212
180
213
181
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
215
182
static bool add_environment(plugin *p, const char *def, bool replace){
216
183
if(p == NULL){
217
184
return false;
219
186
/* namelen = length of name of environment variable */
220
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
221
188
/* Search for this environment variable */
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen+1) == 0){
224
191
/* It already exists */
225
192
if(replace){
226
char *new_envdef;
227
do {
228
new_envdef = realloc(*envdef, strlen(def) + 1);
229
} while(new_envdef == NULL and errno == EINTR);
230
if(new_envdef == NULL){
193
char *new = realloc(*e, strlen(def));
194
if(new == NULL){
231
195
return false;
232
196
}
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
197
*e = new;
198
strcpy(*e, def);
235
199
}
236
200
return true;
237
201
}
242
206
/*
243
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
244
208
* Descriptor Flags".
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
210
*/
247
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
249
214
/* If reading the flags failed, return error indication now. */
250
215
if(ret < 0){
251
216
return ret;
252
217
}
253
218
/* Store modified flag word in the descriptor. */
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
220
}
257
221
258
222
259
223
/* Mark processes as completed when they exit, and save their exit
260
224
status. */
261
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
225
void handle_sigchld(__attribute__((unused)) int sig){
263
226
while(true){
264
227
plugin *proc = plugin_list;
265
228
int status;
269
232
break;
270
233
}
271
234
if(pid == -1){
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
235
if (errno != ECHILD){
236
perror("waitpid");
275
237
}
276
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
277
240
}
278
241
279
242
/* A child exited, find it in process_list */
280
243
while(proc != NULL and proc->pid != pid){
281
244
proc = proc->next;
285
248
continue;
286
249
}
287
250
proc->status = status;
288
proc->completed = 1;
251
proc->completed = true;
289
252
}
290
errno = old_errno;
291
253
}
292
254
293
255
/* Prints out a password to stdout */
294
__attribute__((nonnull))
295
static bool print_out_password(const char *buffer, size_t length){
256
bool print_out_password(const char *buffer, size_t length){
296
257
ssize_t ret;
258
if(length>0 and buffer[length-1] == '\n'){
259
length--;
260
}
297
261
for(size_t written = 0; written < length; written += (size_t)ret){
298
262
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
299
263
length - written));
305
269
}
306
270
307
271
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
309
272
static void free_plugin(plugin *plugin_node){
310
273
311
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
317
280
}
318
281
free(plugin_node->environ);
319
282
free(plugin_node->buffer);
320
283
321
284
/* Removes the plugin from the singly-linked list */
322
285
if(plugin_node == plugin_list){
323
286
/* First one - simple */
351
314
struct stat st;
352
315
fd_set rfds_all;
353
316
int ret, maxfd = 0;
354
ssize_t sret;
355
317
uid_t uid = 65534;
356
318
gid_t gid = 65534;
357
319
bool debug = false;
366
328
sigemptyset(&sigchld_action.sa_mask);
367
329
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
368
330
if(ret == -1){
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
331
perror("sigaddset");
332
exitstatus = EXIT_FAILURE;
371
333
goto fallback;
372
334
}
373
335
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
374
336
if(ret == -1){
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
337
perror("sigaction");
338
exitstatus = EXIT_FAILURE;
377
339
goto fallback;
378
340
}
379
341
382
344
{ .name = "global-options", .key = 'g',
383
345
.arg = "OPTION[,OPTION[,...]]",
384
346
.doc = "Options passed to all plugins" },
385
{ .name = "global-env", .key = 'G',
347
{ .name = "global-env", .key = 'e',
386
348
.arg = "VAR=value",
387
349
.doc = "Environment variable passed to all plugins" },
388
350
{ .name = "options-for", .key = 'o',
389
351
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
390
352
.doc = "Options passed only to specified plugin" },
391
{ .name = "env-for", .key = 'E',
353
{ .name = "env-for", .key = 'f',
392
354
.arg = "PLUGIN:ENV=value",
393
355
.doc = "Environment variable passed to specified plugin" },
394
356
{ .name = "disable", .key = 'd',
395
357
.arg = "PLUGIN",
396
358
.doc = "Disable a specific plugin", .group = 1 },
397
{ .name = "enable", .key = 'e',
398
.arg = "PLUGIN",
399
.doc = "Enable a specific plugin", .group = 1 },
400
359
{ .name = "plugin-dir", .key = 128,
401
360
.arg = "DIRECTORY",
402
361
.doc = "Specify a different plugin directory", .group = 2 },
411
370
.doc = "Group ID the plugins will run as", .group = 3 },
412
371
{ .name = "debug", .key = 132,
413
372
.doc = "Debug mode", .group = 4 },
414
/*
415
* These reproduce what we would get without ARGP_NO_HELP
416
*/
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
423
373
{ .name = NULL }
424
374
};
425
375
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
428
errno = 0;
429
switch(key){
430
char *tmp;
431
intmax_t tmp_id;
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
378
/* Get the INPUT argument from `argp_parse', which we know is a
379
pointer to our plugin list pointer. */
380
switch (key) {
432
381
case 'g': /* --global-options */
382
if (arg != NULL){
383
char *p;
384
while((p = strsep(&arg, ",")) != NULL){
385
if(p[0] == '\0'){
386
continue;
387
}
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
391
}
392
}
393
}
394
break;
395
case 'e': /* --global-env */
396
if(arg == NULL){
397
break;
398
}
433
399
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
438
}
400
char *envdef = strdup(arg);
401
if(envdef == NULL){
402
break;
403
}
404
if(not add_environment(getplugin(NULL), envdef, true)){
405
perror("add_environment");
439
406
}
440
407
}
441
408
break;
442
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
444
break;
445
409
case 'o': /* --options-for */
446
{
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
450
errno = EINVAL;
451
break;
452
}
453
*option_list = '\0';
454
option_list++;
455
if(arg[0] == '\0'){
456
argp_error(state, "Empty plugin name");
457
errno = EINVAL;
458
break;
459
}
460
char *option;
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
463
break;
410
if (arg != NULL){
411
char *p_name = strsep(&arg, ":");
412
if(p_name[0] == '\0'){
413
break;
414
}
415
char *opt = strsep(&arg, ":");
416
if(opt[0] == '\0'){
417
break;
418
}
419
if(opt != NULL){
420
char *p;
421
while((p = strsep(&opt, ",")) != NULL){
422
if(p[0] == '\0'){
423
continue;
424
}
425
if(not add_argument(getplugin(p_name), p)){
426
perror("add_argument");
427
return ARGP_ERR_UNKNOWN;
428
}
464
429
}
465
430
}
466
431
}
467
432
break;
468
case 'E': /* --env-for */
433
case 'f': /* --env-for */
434
if(arg == NULL){
435
break;
436
}
469
437
{
470
438
char *envdef = strchr(arg, ':');
471
439
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
break;
475
}
476
*envdef = '\0';
440
break;
441
}
442
char *p_name = strndup(arg, (size_t) (envdef-arg));
443
if(p_name == NULL){
444
break;
445
}
477
446
envdef++;
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
447
if(not add_environment(getplugin(p_name), envdef, true)){
448
perror("add_environment");
482
449
}
483
add_environment(getplugin(arg), envdef, true);
484
450
}
485
451
break;
486
452
case 'd': /* --disable */
487
{
488
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = true;
491
}
492
}
493
break;
494
case 'e': /* --enable */
495
{
496
plugin *p = getplugin(arg);
497
if(p != NULL){
498
p->disabled = false;
499
}
453
if (arg != NULL){
454
plugin *p = getplugin(arg);
455
if(p == NULL){
456
return ARGP_ERR_UNKNOWN;
457
}
458
p->disabled = true;
500
459
}
501
460
break;
502
461
case 128: /* --plugin-dir */
503
free(plugindir);
504
462
plugindir = strdup(arg);
463
if(plugindir == NULL){
464
perror("strdup");
465
}
505
466
break;
506
467
case 129: /* --config-file */
507
/* This is already done by parse_opt_config_file() */
508
break;
468
argfile = strdup(arg);
469
if(argfile == NULL){
470
perror("strdup");
471
}
472
break;
509
473
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
515
break;
516
}
517
uid = (uid_t)tmp_id;
474
uid = (uid_t)strtol(arg, NULL, 10);
518
475
break;
519
476
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
525
break;
526
}
527
gid = (gid_t)tmp_id;
477
gid = (gid_t)strtol(arg, NULL, 10);
528
478
break;
529
479
case 132: /* --debug */
530
480
debug = true;
531
481
break;
532
/*
533
* These reproduce what we would get without ARGP_NO_HELP
534
*/
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
544
exit(EXIT_SUCCESS);
545
break;
546
/*
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
549
*/
550
case ARGP_KEY_ARG:
551
/* Cryptsetup always passes an argument, which is an empty
552
string if "none" was specified in /etc/crypttab. So if
553
argument was empty, we ignore it silently. */
554
if(arg[0] == '\0'){
555
break;
556
}
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return errno; /* Set to 0 at start */
561
}
562
563
/* This option parser is the same as parse_opt() above, except it
564
ignores everything but the --config-file option. */
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
568
errno = 0;
569
switch(key){
570
case 'g': /* --global-options */
571
case 'G': /* --global-env */
572
case 'o': /* --options-for */
573
case 'E': /* --env-for */
574
case 'd': /* --disable */
575
case 'e': /* --enable */
576
case 128: /* --plugin-dir */
577
break;
578
case 129: /* --config-file */
579
free(argfile);
580
argfile = strdup(arg);
581
break;
582
case 130: /* --userid */
583
case 131: /* --groupid */
584
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
588
case ARGP_KEY_ARG:
589
break;
590
default:
591
return ARGP_ERR_UNKNOWN;
592
}
593
return errno;
594
}
595
596
struct argp argp = { .options = options,
597
.parser = parse_opt_config_file,
482
case ARGP_KEY_ARG:
483
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
484
break;
485
case ARGP_KEY_END:
486
break;
487
default:
488
return ARGP_ERR_UNKNOWN;
489
}
490
return 0;
491
}
492
493
struct argp argp = { .options = options, .parser = parse_opt,
598
494
.args_doc = "",
599
495
.doc = "Mandos plugin runner -- Run plugins" };
600
496
601
/* Parse using parse_opt_config_file() in order to get the custom
602
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
605
NULL, NULL);
606
switch(ret){
607
case 0:
608
break;
609
case ENOMEM:
610
default:
611
errno = ret;
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
614
goto fallback;
615
case EINVAL:
616
exitstatus = EX_USAGE;
617
goto fallback;
618
}
619
620
/* Reset to the normal argument parser */
621
argp.parser = parse_opt;
622
623
497
/* Open the configfile if available */
624
if(argfile == NULL){
498
if (argfile == NULL){
625
499
conffp = fopen(AFILE, "r");
626
500
} else {
627
501
conffp = fopen(argfile, "r");
628
}
502
}
629
503
if(conffp != NULL){
630
504
char *org_line = NULL;
631
505
char *p, *arg, *new_arg, *line;
632
506
size_t size = 0;
507
ssize_t sret;
633
508
const char whitespace_delims[] = " \r\t\f\v\n";
634
509
const char comment_delim[] = "#";
635
510
636
511
custom_argc = 1;
637
512
custom_argv = malloc(sizeof(char*) * 2);
638
513
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
514
perror("malloc");
515
exitstatus = EXIT_FAILURE;
641
516
goto fallback;
642
517
}
643
518
custom_argv[0] = argv[0];
644
519
custom_argv[1] = NULL;
645
520
646
521
/* for each line in the config file, strip whitespace and ignore
647
522
commented text */
648
523
while(true){
650
525
if(sret == -1){
651
526
break;
652
527
}
653
528
654
529
line = org_line;
655
530
arg = strsep(&line, comment_delim);
656
531
while((p = strsep(&arg, whitespace_delims)) != NULL){
659
534
}
660
535
new_arg = strdup(p);
661
536
if(new_arg == NULL){
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
537
perror("strdup");
538
exitstatus = EXIT_FAILURE;
664
539
free(org_line);
665
540
goto fallback;
666
541
}
667
542
668
543
custom_argc += 1;
669
{
670
char **new_argv = realloc(custom_argv, sizeof(char *)
671
* ((unsigned int)
672
custom_argc + 1));
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
676
free(new_arg);
677
free(org_line);
678
goto fallback;
679
} else {
680
custom_argv = new_argv;
681
}
544
custom_argv = realloc(custom_argv, sizeof(char *)
545
* ((unsigned int) custom_argc + 1));
546
if(custom_argv == NULL){
547
perror("realloc");
548
exitstatus = EXIT_FAILURE;
549
free(org_line);
550
goto fallback;
682
551
}
683
552
custom_argv[custom_argc-1] = new_arg;
684
custom_argv[custom_argc] = NULL;
553
custom_argv[custom_argc] = NULL;
685
554
}
686
555
}
687
do {
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
690
if(ret == EOF){
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
693
goto fallback;
694
}
695
556
free(org_line);
696
557
} else {
697
558
/* Check for harmful errors and go to fallback. Other errors might
698
559
not affect opening plugins */
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
560
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
561
perror("fopen");
562
exitstatus = EXIT_FAILURE;
702
563
goto fallback;
703
564
}
704
565
}
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
566
/* If there was any arguments from configuration file,
567
pass them to parser as command arguments */
707
568
if(custom_argv != NULL){
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
710
NULL, NULL);
711
switch(ret){
712
case 0:
713
break;
714
case ENOMEM:
715
default:
716
errno = ret;
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
719
goto fallback;
720
case EINVAL:
721
exitstatus = EX_CONFIG;
569
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
570
0, NULL);
571
if (ret == ARGP_ERR_UNKNOWN){
572
fprintf(stderr, "Unknown error while parsing arguments\n");
573
exitstatus = EXIT_FAILURE;
722
574
goto fallback;
723
575
}
724
576
}
725
577
726
578
/* Parse actual command line arguments, to let them override the
727
579
config file */
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
730
NULL, NULL);
731
switch(ret){
732
case 0:
733
break;
734
case ENOMEM:
735
default:
736
errno = ret;
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
739
goto fallback;
740
case EINVAL:
741
exitstatus = EX_USAGE;
580
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
581
if (ret == ARGP_ERR_UNKNOWN){
582
fprintf(stderr, "Unknown error while parsing arguments\n");
583
exitstatus = EXIT_FAILURE;
742
584
goto fallback;
743
585
}
744
586
749
591
for(char **a = p->argv; *a != NULL; a++){
750
592
fprintf(stderr, "\tArg: %s\n", *a);
751
593
}
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
594
fprintf(stderr, "...and %u environment variables\n", p->envc);
753
595
for(char **a = p->environ; *a != NULL; a++){
754
596
fprintf(stderr, "\t%s\n", *a);
755
597
}
756
598
}
757
599
}
758
600
759
if(getuid() == 0){
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
765
} else {
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
767
if(ret == -1){
768
error(0, errno, "fstat");
769
} else {
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
772
if(ret == -1){
773
error(0, errno, "fchown");
774
}
775
}
776
}
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
778
}
779
}
780
781
/* Lower permissions */
782
ret = setgid(gid);
783
if(ret == -1){
784
error(0, errno, "setgid");
785
}
601
/* Strip permissions down to nobody */
786
602
ret = setuid(uid);
787
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
603
if (ret == -1){
604
perror("setuid");
605
}
606
setgid(gid);
607
if (ret == -1){
608
perror("setgid");
609
}
610
611
if (plugindir == NULL){
612
dir = opendir(PDIR);
613
} else {
614
dir = opendir(plugindir);
615
}
616
617
if(dir == NULL){
618
perror("Could not open plugin dir");
619
exitstatus = EXIT_FAILURE;
620
goto fallback;
621
}
622
623
/* Set the FD_CLOEXEC flag on the directory, if possible */
792
624
{
793
int dir_fd = -1;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
796
#ifdef O_CLOEXEC
797
O_CLOEXEC
798
#else /* not O_CLOEXEC */
799
0
800
#endif /* not O_CLOEXEC */
801
);
802
} else {
803
dir_fd = open(plugindir, O_RDONLY |
804
#ifdef O_CLOEXEC
805
O_CLOEXEC
806
#else /* not O_CLOEXEC */
807
0
808
#endif /* not O_CLOEXEC */
809
);
810
}
811
if(dir_fd == -1){
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
814
goto fallback;
815
}
816
817
#ifndef O_CLOEXEC
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
820
if(ret < 0){
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
824
goto fallback;
825
}
826
#endif /* O_CLOEXEC */
827
828
dir = fdopendir(dir_fd);
829
if(dir == NULL){
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
833
goto fallback;
625
int dir_fd = dirfd(dir);
626
if(dir_fd >= 0){
627
ret = set_cloexec_flag(dir_fd);
628
if(ret < 0){
629
perror("set_cloexec_flag");
630
exitstatus = EXIT_FAILURE;
631
goto fallback;
632
}
834
633
}
835
634
}
836
635
838
637
839
638
/* Read and execute any executable in the plugin directory*/
840
639
while(true){
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
640
dirst = readdir(dir);
844
641
845
642
/* All directory entries have been processed */
846
643
if(dirst == NULL){
847
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
644
if (errno == EBADF){
645
perror("readdir");
646
exitstatus = EXIT_FAILURE;
850
647
goto fallback;
851
648
}
852
649
break;
858
655
{
859
656
bool bad_name = false;
860
657
861
const char * const bad_prefixes[] = { ".", "#", NULL };
658
const char const *bad_prefixes[] = { ".", "#", NULL };
862
659
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
660
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
864
661
".dpkg-old",
865
".dpkg-bak",
866
662
".dpkg-divert", NULL };
867
#ifdef __GNUC__
868
#pragma GCC diagnostic push
869
#pragma GCC diagnostic ignored "-Wcast-qual"
870
#endif
871
for(const char **pre = (const char **)bad_prefixes;
872
*pre != NULL; pre++){
873
#ifdef __GNUC__
874
#pragma GCC diagnostic pop
875
#endif
663
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
876
664
size_t pre_len = strlen(*pre);
877
665
if((d_name_len >= pre_len)
878
666
and strncmp((dirst->d_name), *pre, pre_len) == 0){
887
675
if(bad_name){
888
676
continue;
889
677
}
890
#ifdef __GNUC__
891
#pragma GCC diagnostic push
892
#pragma GCC diagnostic ignored "-Wcast-qual"
893
#endif
894
for(const char **suf = (const char **)bad_suffixes;
895
*suf != NULL; suf++){
896
#ifdef __GNUC__
897
#pragma GCC diagnostic pop
898
#endif
678
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
899
679
size_t suf_len = strlen(*suf);
900
680
if((d_name_len >= suf_len)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
681
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
902
682
== 0)){
903
683
if(debug){
904
684
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
693
continue;
914
694
}
915
695
}
916
696
917
697
char *filename;
918
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
920
dirst->d_name));
921
} else {
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
923
plugindir,
924
dirst->d_name));
925
}
698
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
926
699
if(ret < 0){
927
error(0, errno, "asprintf");
700
perror("asprintf");
928
701
continue;
929
702
}
930
703
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
if(ret == -1){
933
error(0, errno, "stat");
704
ret = stat(filename, &st);
705
if (ret == -1){
706
perror("stat");
934
707
free(filename);
935
708
continue;
936
709
}
937
710
938
711
/* Ignore non-executable files */
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
712
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
941
713
if(debug){
942
714
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
943
715
" with bad type or mode\n", filename);
948
720
949
721
plugin *p = getplugin(dirst->d_name);
950
722
if(p == NULL){
951
error(0, errno, "getplugin");
723
perror("getplugin");
952
724
free(filename);
953
725
continue;
954
726
}
966
738
if(g != NULL){
967
739
for(char **a = g->argv + 1; *a != NULL; a++){
968
740
if(not add_argument(p, *a)){
969
error(0, errno, "add_argument");
741
perror("add_argument");
970
742
}
971
743
}
972
744
/* Add global environment variables */
973
745
for(char **e = g->environ; *e != NULL; e++){
974
746
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
747
perror("add_environment");
976
748
}
977
749
}
978
750
}
983
755
if(p->environ[0] != NULL){
984
756
for(char **e = environ; *e != NULL; e++){
985
757
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
758
perror("add_environment");
987
759
}
988
760
}
989
761
}
990
762
991
763
int pipefd[2];
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
764
ret = pipe(pipefd);
765
if (ret == -1){
766
perror("pipe");
767
exitstatus = EXIT_FAILURE;
996
768
goto fallback;
997
769
}
998
770
/* Ask OS to automatic close the pipe on exec */
999
771
ret = set_cloexec_flag(pipefd[0]);
1000
772
if(ret < 0){
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
1003
775
goto fallback;
1004
776
}
1005
777
ret = set_cloexec_flag(pipefd[1]);
1006
778
if(ret < 0){
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
779
perror("set_cloexec_flag");
780
exitstatus = EXIT_FAILURE;
1009
781
goto fallback;
1010
782
}
1011
783
/* Block SIGCHLD until process is safely in process list */
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
784
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1015
785
if(ret < 0){
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
786
perror("sigprocmask");
787
exitstatus = EXIT_FAILURE;
1018
788
goto fallback;
1019
789
}
1020
790
/* Starting a new process to be watched */
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
791
pid_t pid = fork();
1025
792
if(pid == -1){
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
793
perror("fork");
794
exitstatus = EXIT_FAILURE;
1028
795
goto fallback;
1029
796
}
1030
797
if(pid == 0){
1031
798
/* this is the child process */
1032
799
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1033
800
if(ret < 0){
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
801
perror("sigaction");
802
_exit(EXIT_FAILURE);
1036
803
}
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
804
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
805
if(ret < 0){
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
806
perror("sigprocmask");
807
_exit(EXIT_FAILURE);
1041
808
}
1042
809
1043
810
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1044
811
if(ret == -1){
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
812
perror("dup2");
813
_exit(EXIT_FAILURE);
1047
814
}
1048
815
1049
816
if(dirfd(dir) < 0){
1053
820
}
1054
821
if(p->environ[0] == NULL){
1055
822
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
823
perror("execv");
824
_exit(EXIT_FAILURE);
1058
825
}
1059
826
} else {
1060
827
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
828
perror("execve");
829
_exit(EXIT_FAILURE);
1063
830
}
1064
831
}
1065
832
/* no return */
1066
833
}
1067
834
/* Parent process */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
835
close(pipefd[1]); /* Close unused write end of pipe */
1070
836
free(filename);
1071
837
plugin *new_plugin = getplugin(dirst->d_name);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1076
NULL)));
838
if (new_plugin == NULL){
839
perror("getplugin");
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1077
841
if(ret < 0){
1078
error(0, errno, "sigprocmask");
842
perror("sigprocmask");
1079
843
}
1080
exitstatus = EX_OSERR;
844
exitstatus = EXIT_FAILURE;
1081
845
goto fallback;
1082
846
}
1083
847
1086
850
1087
851
/* Unblock SIGCHLD so signal handler can be run if this process
1088
852
has already completed */
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
853
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1092
854
if(ret < 0){
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1095
857
goto fallback;
1096
858
}
1097
859
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1102
#endif
1103
#endif
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1106
before 2.16 */
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
1110
#endif
1111
#endif
860
FD_SET(new_plugin->fd, &rfds_all);
1112
861
1113
if(maxfd < new_plugin->fd){
862
if (maxfd < new_plugin->fd){
1114
863
maxfd = new_plugin->fd;
1115
864
}
865
1116
866
}
1117
867
1118
TEMP_FAILURE_RETRY(closedir(dir));
868
closedir(dir);
1119
869
dir = NULL;
1120
free_plugin(getplugin(NULL));
1121
870
1122
871
for(plugin *p = plugin_list; p != NULL; p = p->next){
1123
872
if(p->pid != 0){
1124
873
break;
1129
878
free_plugin_list();
1130
879
}
1131
880
}
1132
881
1133
882
/* Main loop while running plugins exist */
1134
883
while(plugin_list){
1135
884
fd_set rfds = rfds_all;
1136
885
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
886
if (select_ret == -1){
887
perror("select");
888
exitstatus = EXIT_FAILURE;
1140
889
goto fallback;
1141
890
}
1142
891
/* OK, now either a process completed, or something can be read
1143
892
from one of them */
1144
for(plugin *proc = plugin_list; proc != NULL;){
893
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1145
894
/* Is this process completely done? */
1146
if(proc->completed and proc->eof){
895
if(proc->eof and proc->completed){
1147
896
/* Only accept the plugin output if it exited cleanly */
1148
897
if(not WIFEXITED(proc->status)
1149
898
or WEXITSTATUS(proc->status) != 0){
1150
899
/* Bad exit by plugin */
1151
900
1152
901
if(debug){
1153
902
if(WIFEXITED(proc->status)){
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
903
fprintf(stderr, "Plugin %u exited with status %d\n",
904
(unsigned int) (proc->pid),
1157
905
WEXITSTATUS(proc->status));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
906
} else if(WIFSIGNALED(proc->status)) {
907
fprintf(stderr, "Plugin %u killed by signal %d\n",
908
(unsigned int) (proc->pid),
909
WTERMSIG(proc->status));
1164
910
} else if(WCOREDUMP(proc->status)){
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
911
fprintf(stderr, "Plugin %d dumped core\n",
912
(unsigned int) (proc->pid));
1167
913
}
1168
914
}
1169
915
1170
916
/* Remove the plugin */
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1175
#endif
1176
#endif
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1179
before 2.16 */
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
1183
#endif
1184
#endif
1185
917
FD_CLR(proc->fd, &rfds_all);
918
1186
919
/* Block signal while modifying process_list */
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
920
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1191
921
if(ret < 0){
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1194
924
goto fallback;
1195
925
}
1196
1197
plugin *next_plugin = proc->next;
1198
926
free_plugin(proc);
1199
proc = next_plugin;
1200
1201
927
/* We are done modifying process list, so unblock signal */
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
928
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
929
NULL);
1205
930
if(ret < 0){
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
931
perror("sigprocmask");
932
exitstatus = EXIT_FAILURE;
1208
933
goto fallback;
1209
934
}
1210
935
1211
936
if(plugin_list == NULL){
1212
937
break;
1213
938
}
1214
1215
939
continue;
1216
940
}
1217
941
1218
942
/* This process exited nicely, so print its buffer */
1219
943
1220
944
bool bret = print_out_password(proc->buffer,
1221
945
proc->buffer_length);
1222
946
if(not bret){
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
947
perror("print_out_password");
948
exitstatus = EXIT_FAILURE;
1225
949
}
1226
950
goto fallback;
1227
951
}
1228
952
1229
953
/* This process has not completed. Does it have any output? */
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1234
#endif
1235
#endif
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1237
warning from
1238
-Wconversion
1239
in GNU libc
1240
before
1241
2.16 */
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1245
#endif
1246
#endif
954
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1247
955
/* This process had nothing to say at this time */
1248
proc = proc->next;
1249
956
continue;
1250
957
}
1251
958
/* Before reading, make the process' data buffer large enough */
1252
959
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
960
proc->buffer = realloc(proc->buffer, proc->buffer_size
961
+ (size_t) BUFFER_SIZE);
962
if (proc->buffer == NULL){
963
perror("malloc");
964
exitstatus = EXIT_FAILURE;
1258
965
goto fallback;
1259
966
}
1260
proc->buffer = new_buffer;
1261
967
proc->buffer_size += BUFFER_SIZE;
1262
968
}
1263
969
/* Read from the process */
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1268
if(sret < 0){
970
ret = read(proc->fd, proc->buffer + proc->buffer_length,
971
BUFFER_SIZE);
972
if(ret < 0){
1269
973
/* Read error from this process; ignore the error */
1270
proc = proc->next;
1271
974
continue;
1272
975
}
1273
if(sret == 0){
976
if(ret == 0){
1274
977
/* got EOF */
1275
978
proc->eof = true;
1276
979
} else {
1277
proc->buffer_length += (size_t) sret;
980
proc->buffer_length += (size_t) ret;
1278
981
}
1279
982
}
1280
983
}
1281
1282
984
985
1283
986
fallback:
1284
987
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
988
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1287
989
/* Fallback if all plugins failed, none are found or an error
1288
990
occured */
1289
991
bool bret;
1290
992
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1291
993
char *passwordbuffer = getpass("Password: ");
1292
size_t len = strlen(passwordbuffer);
1293
/* Strip trailing newline */
1294
if(len > 0 and passwordbuffer[len-1] == '\n'){
1295
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1296
len--;
1297
}
1298
bret = print_out_password(passwordbuffer, len);
994
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1299
995
if(not bret){
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
996
perror("print_out_password");
997
exitstatus = EXIT_FAILURE;
1302
998
}
1303
999
}
1304
1000
1305
1001
/* Restore old signal handler */
1306
1002
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1307
1003
if(ret == -1){
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1004
perror("sigaction");
1005
exitstatus = EXIT_FAILURE;
1310
1006
}
1311
1007
1312
1008
if(custom_argv != NULL){
1313
1009
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1314
1010
free(*arg);
1320
1016
closedir(dir);
1321
1017
}
1322
1018
1323
/* Kill the processes */
1019
/* Free the process list and kill the processes */
1324
1020
for(plugin *p = plugin_list; p != NULL; p = p->next){
1325
1021
if(p->pid != 0){
1326
1022
close(p->fd);
1327
1023
ret = kill(p->pid, SIGTERM);
1328
1024
if(ret == -1 and errno != ESRCH){
1329
1025
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
1026
perror("kill");
1331
1027
}
1332
1028
}
1333
1029
}
1334
1030
1335
1031
/* Wait for any remaining child processes to terminate */
1336
do {
1032
do{
1337
1033
ret = wait(NULL);
1338
1034
} while(ret >= 0);
1339
1035
if(errno != ECHILD){
1340
error(0, errno, "wait");
1036
perror("wait");
1341
1037
}
1342
1038
1343
1039
free_plugin_list();
1344
1040
1345
1041
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0