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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
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
182
static bool add_environment(plugin *p, const char *def, bool replace){
214
183
if(p == NULL){
215
184
return false;
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){
190
if(strncmp(*e, def, namelen+1) == 0){
222
191
/* It already exists */
223
192
if(replace){
224
char *new;
225
do {
226
new = realloc(*e, strlen(def) + 1);
227
} while(new == NULL and errno == EINTR);
193
char *new = realloc(*e, strlen(def));
228
194
if(new == NULL){
229
195
return false;
230
196
}
240
206
/*
241
207
* Based on the example in the GNU LibC manual chapter 13.13 "File
242
208
* Descriptor Flags".
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
244
210
*/
245
static int set_cloexec_flag(int fd){
246
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);
247
214
/* If reading the flags failed, return error indication now. */
248
215
if(ret < 0){
249
216
return ret;
250
217
}
251
218
/* Store modified flag word in the descriptor. */
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
220
}
255
221
256
222
257
223
/* Mark processes as completed when they exit, and save their exit
258
224
status. */
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
225
void handle_sigchld(__attribute__((unused)) int sig){
261
226
while(true){
262
227
plugin *proc = plugin_list;
263
228
int status;
267
232
break;
268
233
}
269
234
if(pid == -1){
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
235
if (errno != ECHILD){
236
perror("waitpid");
273
237
}
274
error(0, errno, "waitpid");
238
/* No child processes */
239
break;
275
240
}
276
241
277
242
/* A child exited, find it in process_list */
278
243
while(proc != NULL and proc->pid != pid){
279
244
proc = proc->next;
283
248
continue;
284
249
}
285
250
proc->status = status;
286
proc->completed = 1;
251
proc->completed = true;
287
252
}
288
errno = old_errno;
289
253
}
290
254
291
255
/* Prints out a password to stdout */
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
256
bool print_out_password(const char *buffer, size_t length){
294
257
ssize_t ret;
258
if(length>0 and buffer[length-1] == '\n'){
259
length--;
260
}
295
261
for(size_t written = 0; written < length; written += (size_t)ret){
296
262
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
297
263
length - written));
303
269
}
304
270
305
271
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
307
272
static void free_plugin(plugin *plugin_node){
308
273
309
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
315
280
}
316
281
free(plugin_node->environ);
317
282
free(plugin_node->buffer);
318
283
319
284
/* Removes the plugin from the singly-linked list */
320
285
if(plugin_node == plugin_list){
321
286
/* First one - simple */
349
314
struct stat st;
350
315
fd_set rfds_all;
351
316
int ret, maxfd = 0;
352
ssize_t sret;
353
317
uid_t uid = 65534;
354
318
gid_t gid = 65534;
355
319
bool debug = false;
364
328
sigemptyset(&sigchld_action.sa_mask);
365
329
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
366
330
if(ret == -1){
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
331
perror("sigaddset");
332
exitstatus = EXIT_FAILURE;
369
333
goto fallback;
370
334
}
371
335
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
372
336
if(ret == -1){
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
337
perror("sigaction");
338
exitstatus = EXIT_FAILURE;
375
339
goto fallback;
376
340
}
377
341
380
344
{ .name = "global-options", .key = 'g',
381
345
.arg = "OPTION[,OPTION[,...]]",
382
346
.doc = "Options passed to all plugins" },
383
{ .name = "global-env", .key = 'G',
347
{ .name = "global-env", .key = 'e',
384
348
.arg = "VAR=value",
385
349
.doc = "Environment variable passed to all plugins" },
386
350
{ .name = "options-for", .key = 'o',
387
351
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
388
352
.doc = "Options passed only to specified plugin" },
389
{ .name = "env-for", .key = 'E',
353
{ .name = "env-for", .key = 'f',
390
354
.arg = "PLUGIN:ENV=value",
391
355
.doc = "Environment variable passed to specified plugin" },
392
356
{ .name = "disable", .key = 'd',
393
357
.arg = "PLUGIN",
394
358
.doc = "Disable a specific plugin", .group = 1 },
395
{ .name = "enable", .key = 'e',
396
.arg = "PLUGIN",
397
.doc = "Enable a specific plugin", .group = 1 },
398
359
{ .name = "plugin-dir", .key = 128,
399
360
.arg = "DIRECTORY",
400
361
.doc = "Specify a different plugin directory", .group = 2 },
409
370
.doc = "Group ID the plugins will run as", .group = 3 },
410
371
{ .name = "debug", .key = 132,
411
372
.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
373
{ .name = NULL }
422
374
};
423
375
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;
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) {
430
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
}
431
399
{
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
436
}
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");
437
406
}
438
407
}
439
408
break;
440
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
442
break;
443
409
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;
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
}
462
429
}
463
430
}
464
431
}
465
432
break;
466
case 'E': /* --env-for */
433
case 'f': /* --env-for */
434
if(arg == NULL){
435
break;
436
}
467
437
{
468
438
char *envdef = strchr(arg, ':');
469
439
if(envdef == NULL){
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
break;
473
}
474
*envdef = '\0';
440
break;
441
}
442
char *p_name = strndup(arg, (size_t) (envdef-arg));
443
if(p_name == NULL){
444
break;
445
}
475
446
envdef++;
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
447
if(not add_environment(getplugin(p_name), envdef, true)){
448
perror("add_environment");
480
449
}
481
add_environment(getplugin(arg), envdef, true);
482
450
}
483
451
break;
484
452
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
}
453
if (arg != NULL){
454
plugin *p = getplugin(arg);
455
if(p == NULL){
456
return ARGP_ERR_UNKNOWN;
457
}
458
p->disabled = true;
498
459
}
499
460
break;
500
461
case 128: /* --plugin-dir */
501
free(plugindir);
502
462
plugindir = strdup(arg);
463
if(plugindir == NULL){
464
perror("strdup");
465
}
503
466
break;
504
467
case 129: /* --config-file */
505
/* This is already done by parse_opt_config_file() */
506
break;
468
argfile = strdup(arg);
469
if(argfile == NULL){
470
perror("strdup");
471
}
472
break;
507
473
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;
474
uid = (uid_t)strtol(arg, NULL, 10);
516
475
break;
517
476
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;
477
gid = (gid_t)strtol(arg, NULL, 10);
526
478
break;
527
479
case 132: /* --debug */
528
480
debug = true;
529
481
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,
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,
596
494
.args_doc = "",
597
495
.doc = "Mandos plugin runner -- Run plugins" };
598
496
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;
615
goto fallback;
616
}
617
618
/* Reset to the normal argument parser */
619
argp.parser = parse_opt;
620
621
497
/* Open the configfile if available */
622
if(argfile == NULL){
498
if (argfile == NULL){
623
499
conffp = fopen(AFILE, "r");
624
500
} else {
625
501
conffp = fopen(argfile, "r");
626
}
502
}
627
503
if(conffp != NULL){
628
504
char *org_line = NULL;
629
505
char *p, *arg, *new_arg, *line;
630
506
size_t size = 0;
507
ssize_t sret;
631
508
const char whitespace_delims[] = " \r\t\f\v\n";
632
509
const char comment_delim[] = "#";
633
510
634
511
custom_argc = 1;
635
512
custom_argv = malloc(sizeof(char*) * 2);
636
513
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
514
perror("malloc");
515
exitstatus = EXIT_FAILURE;
639
516
goto fallback;
640
517
}
641
518
custom_argv[0] = argv[0];
642
519
custom_argv[1] = NULL;
643
520
644
521
/* for each line in the config file, strip whitespace and ignore
645
522
commented text */
646
523
while(true){
648
525
if(sret == -1){
649
526
break;
650
527
}
651
528
652
529
line = org_line;
653
530
arg = strsep(&line, comment_delim);
654
531
while((p = strsep(&arg, whitespace_delims)) != NULL){
657
534
}
658
535
new_arg = strdup(p);
659
536
if(new_arg == NULL){
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
537
perror("strdup");
538
exitstatus = EXIT_FAILURE;
662
539
free(org_line);
663
540
goto fallback;
664
541
}
667
544
custom_argv = realloc(custom_argv, sizeof(char *)
668
545
* ((unsigned int) custom_argc + 1));
669
546
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
547
perror("realloc");
548
exitstatus = EXIT_FAILURE;
672
549
free(org_line);
673
550
goto fallback;
674
551
}
675
552
custom_argv[custom_argc-1] = new_arg;
676
custom_argv[custom_argc] = NULL;
553
custom_argv[custom_argc] = NULL;
677
554
}
678
555
}
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
556
free(org_line);
688
557
} else {
689
558
/* Check for harmful errors and go to fallback. Other errors might
690
559
not affect opening plugins */
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
560
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
561
perror("fopen");
562
exitstatus = EXIT_FAILURE;
694
563
goto fallback;
695
564
}
696
565
}
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
566
/* If there was any arguments from configuration file,
567
pass them to parser as command arguments */
699
568
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;
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;
714
574
goto fallback;
715
575
}
716
576
}
717
577
718
578
/* Parse actual command line arguments, to let them override the
719
579
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;
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;
734
584
goto fallback;
735
585
}
736
586
741
591
for(char **a = p->argv; *a != NULL; a++){
742
592
fprintf(stderr, "\tArg: %s\n", *a);
743
593
}
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
594
fprintf(stderr, "...and %u environment variables\n", p->envc);
745
595
for(char **a = p->environ; *a != NULL; a++){
746
596
fprintf(stderr, "\t%s\n", *a);
747
597
}
748
598
}
749
599
}
750
600
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
}
601
/* Strip permissions down to nobody */
778
602
ret = setuid(uid);
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* 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 */
784
624
{
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;
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
}
826
633
}
827
634
}
828
635
830
637
831
638
/* Read and execute any executable in the plugin directory*/
832
639
while(true){
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
640
dirst = readdir(dir);
836
641
837
642
/* All directory entries have been processed */
838
643
if(dirst == NULL){
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
644
if (errno == EBADF){
645
perror("readdir");
646
exitstatus = EXIT_FAILURE;
842
647
goto fallback;
843
648
}
844
649
break;
854
659
855
660
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
856
661
".dpkg-old",
857
".dpkg-bak",
858
662
".dpkg-divert", NULL };
859
663
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
860
664
size_t pre_len = strlen(*pre);
874
678
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
875
679
size_t suf_len = strlen(*suf);
876
680
if((d_name_len >= suf_len)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
681
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
878
682
== 0)){
879
683
if(debug){
880
684
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
693
continue;
890
694
}
891
695
}
892
696
893
697
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
}
698
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
902
699
if(ret < 0){
903
error(0, errno, "asprintf");
700
perror("asprintf");
904
701
continue;
905
702
}
906
703
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
908
if(ret == -1){
909
error(0, errno, "stat");
704
ret = stat(filename, &st);
705
if (ret == -1){
706
perror("stat");
910
707
free(filename);
911
708
continue;
912
709
}
913
710
914
711
/* Ignore non-executable files */
915
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
712
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
917
713
if(debug){
918
714
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
919
715
" with bad type or mode\n", filename);
924
720
925
721
plugin *p = getplugin(dirst->d_name);
926
722
if(p == NULL){
927
error(0, errno, "getplugin");
723
perror("getplugin");
928
724
free(filename);
929
725
continue;
930
726
}
942
738
if(g != NULL){
943
739
for(char **a = g->argv + 1; *a != NULL; a++){
944
740
if(not add_argument(p, *a)){
945
error(0, errno, "add_argument");
741
perror("add_argument");
946
742
}
947
743
}
948
744
/* Add global environment variables */
949
745
for(char **e = g->environ; *e != NULL; e++){
950
746
if(not add_environment(p, *e, false)){
951
error(0, errno, "add_environment");
747
perror("add_environment");
952
748
}
953
749
}
954
750
}
959
755
if(p->environ[0] != NULL){
960
756
for(char **e = environ; *e != NULL; e++){
961
757
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
758
perror("add_environment");
963
759
}
964
760
}
965
761
}
966
762
967
763
int pipefd[2];
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
969
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
764
ret = pipe(pipefd);
765
if (ret == -1){
766
perror("pipe");
767
exitstatus = EXIT_FAILURE;
972
768
goto fallback;
973
769
}
974
770
/* Ask OS to automatic close the pipe on exec */
975
771
ret = set_cloexec_flag(pipefd[0]);
976
772
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
979
775
goto fallback;
980
776
}
981
777
ret = set_cloexec_flag(pipefd[1]);
982
778
if(ret < 0){
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
779
perror("set_cloexec_flag");
780
exitstatus = EXIT_FAILURE;
985
781
goto fallback;
986
782
}
987
783
/* 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));
784
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
991
785
if(ret < 0){
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
786
perror("sigprocmask");
787
exitstatus = EXIT_FAILURE;
994
788
goto fallback;
995
789
}
996
790
/* Starting a new process to be watched */
997
pid_t pid;
998
do {
999
pid = fork();
1000
} while(pid == -1 and errno == EINTR);
791
pid_t pid = fork();
1001
792
if(pid == -1){
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
793
perror("fork");
794
exitstatus = EXIT_FAILURE;
1004
795
goto fallback;
1005
796
}
1006
797
if(pid == 0){
1007
798
/* this is the child process */
1008
799
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1009
800
if(ret < 0){
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
801
perror("sigaction");
802
_exit(EXIT_FAILURE);
1012
803
}
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
804
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1014
805
if(ret < 0){
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
806
perror("sigprocmask");
807
_exit(EXIT_FAILURE);
1017
808
}
1018
809
1019
810
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1020
811
if(ret == -1){
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
812
perror("dup2");
813
_exit(EXIT_FAILURE);
1023
814
}
1024
815
1025
816
if(dirfd(dir) < 0){
1029
820
}
1030
821
if(p->environ[0] == NULL){
1031
822
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
823
perror("execv");
824
_exit(EXIT_FAILURE);
1034
825
}
1035
826
} else {
1036
827
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
828
perror("execve");
829
_exit(EXIT_FAILURE);
1039
830
}
1040
831
}
1041
832
/* no return */
1042
833
}
1043
834
/* Parent process */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
835
close(pipefd[1]); /* Close unused write end of pipe */
1046
836
free(filename);
1047
837
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)));
838
if (new_plugin == NULL){
839
perror("getplugin");
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1053
841
if(ret < 0){
1054
error(0, errno, "sigprocmask");
842
perror("sigprocmask");
1055
843
}
1056
exitstatus = EX_OSERR;
844
exitstatus = EXIT_FAILURE;
1057
845
goto fallback;
1058
846
}
1059
847
1062
850
1063
851
/* Unblock SIGCHLD so signal handler can be run if this process
1064
852
has already completed */
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
853
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1068
854
if(ret < 0){
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
855
perror("sigprocmask");
856
exitstatus = EXIT_FAILURE;
1071
857
goto fallback;
1072
858
}
1073
859
1074
#if defined (__GNUC__) and defined (__GLIBC__)
1075
#if not __GLIBC_PREREQ(2, 16)
1076
#pragma GCC diagnostic push
1077
#pragma GCC diagnostic ignored "-Wsign-conversion"
1078
#endif
1079
#endif
1080
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1081
-Wconversion in GNU libc
1082
before 2.16 */
1083
#if defined (__GNUC__) and defined (__GLIBC__)
1084
#if not __GLIBC_PREREQ(2, 16)
1085
#pragma GCC diagnostic pop
1086
#endif
1087
#endif
860
FD_SET(new_plugin->fd, &rfds_all);
1088
861
1089
if(maxfd < new_plugin->fd){
862
if (maxfd < new_plugin->fd){
1090
863
maxfd = new_plugin->fd;
1091
864
}
865
1092
866
}
1093
867
1094
TEMP_FAILURE_RETRY(closedir(dir));
868
closedir(dir);
1095
869
dir = NULL;
1096
free_plugin(getplugin(NULL));
1097
870
1098
871
for(plugin *p = plugin_list; p != NULL; p = p->next){
1099
872
if(p->pid != 0){
1100
873
break;
1105
878
free_plugin_list();
1106
879
}
1107
880
}
1108
881
1109
882
/* Main loop while running plugins exist */
1110
883
while(plugin_list){
1111
884
fd_set rfds = rfds_all;
1112
885
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1113
if(select_ret == -1 and errno != EINTR){
1114
error(0, errno, "select");
1115
exitstatus = EX_OSERR;
886
if (select_ret == -1){
887
perror("select");
888
exitstatus = EXIT_FAILURE;
1116
889
goto fallback;
1117
890
}
1118
891
/* OK, now either a process completed, or something can be read
1119
892
from one of them */
1120
for(plugin *proc = plugin_list; proc != NULL;){
893
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1121
894
/* Is this process completely done? */
1122
if(proc->completed and proc->eof){
895
if(proc->eof and proc->completed){
1123
896
/* Only accept the plugin output if it exited cleanly */
1124
897
if(not WIFEXITED(proc->status)
1125
898
or WEXITSTATUS(proc->status) != 0){
1126
899
/* Bad exit by plugin */
1127
900
1128
901
if(debug){
1129
902
if(WIFEXITED(proc->status)){
1130
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1131
" status %d\n", proc->name,
1132
(intmax_t) (proc->pid),
903
fprintf(stderr, "Plugin %u exited with status %d\n",
904
(unsigned int) (proc->pid),
1133
905
WEXITSTATUS(proc->status));
1134
} else if(WIFSIGNALED(proc->status)){
1135
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1136
" signal %d: %s\n", proc->name,
1137
(intmax_t) (proc->pid),
1138
WTERMSIG(proc->status),
1139
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));
1140
910
} else if(WCOREDUMP(proc->status)){
1141
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1142
" core\n", proc->name, (intmax_t) (proc->pid));
911
fprintf(stderr, "Plugin %d dumped core\n",
912
(unsigned int) (proc->pid));
1143
913
}
1144
914
}
1145
915
1146
916
/* Remove the plugin */
1147
#if defined (__GNUC__) and defined (__GLIBC__)
1148
#if not __GLIBC_PREREQ(2, 16)
1149
#pragma GCC diagnostic push
1150
#pragma GCC diagnostic ignored "-Wsign-conversion"
1151
#endif
1152
#endif
1153
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1154
-Wconversion in GNU libc
1155
before 2.16 */
1156
#if defined (__GNUC__) and defined (__GLIBC__)
1157
#if not __GLIBC_PREREQ(2, 16)
1158
#pragma GCC diagnostic pop
1159
#endif
1160
#endif
1161
917
FD_CLR(proc->fd, &rfds_all);
918
1162
919
/* Block signal while modifying process_list */
1163
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1164
(SIG_BLOCK,
1165
&sigchld_action.sa_mask,
1166
NULL));
920
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1167
921
if(ret < 0){
1168
error(0, errno, "sigprocmask");
1169
exitstatus = EX_OSERR;
922
perror("sigprocmask");
923
exitstatus = EXIT_FAILURE;
1170
924
goto fallback;
1171
925
}
1172
1173
plugin *next_plugin = proc->next;
1174
926
free_plugin(proc);
1175
proc = next_plugin;
1176
1177
927
/* We are done modifying process list, so unblock signal */
1178
ret = (int)(TEMP_FAILURE_RETRY
1179
(sigprocmask(SIG_UNBLOCK,
1180
&sigchld_action.sa_mask, NULL)));
928
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
929
NULL);
1181
930
if(ret < 0){
1182
error(0, errno, "sigprocmask");
1183
exitstatus = EX_OSERR;
931
perror("sigprocmask");
932
exitstatus = EXIT_FAILURE;
1184
933
goto fallback;
1185
934
}
1186
935
1187
936
if(plugin_list == NULL){
1188
937
break;
1189
938
}
1190
1191
939
continue;
1192
940
}
1193
941
1194
942
/* This process exited nicely, so print its buffer */
1195
943
1196
944
bool bret = print_out_password(proc->buffer,
1197
945
proc->buffer_length);
1198
946
if(not bret){
1199
error(0, errno, "print_out_password");
1200
exitstatus = EX_IOERR;
947
perror("print_out_password");
948
exitstatus = EXIT_FAILURE;
1201
949
}
1202
950
goto fallback;
1203
951
}
1204
952
1205
953
/* This process has not completed. Does it have any output? */
1206
#if defined (__GNUC__) and defined (__GLIBC__)
1207
#if not __GLIBC_PREREQ(2, 16)
1208
#pragma GCC diagnostic push
1209
#pragma GCC diagnostic ignored "-Wsign-conversion"
1210
#endif
1211
#endif
1212
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1213
warning from
1214
-Wconversion
1215
in GNU libc
1216
before
1217
2.16 */
1218
#if defined (__GNUC__) and defined (__GLIBC__)
1219
#if not __GLIBC_PREREQ(2, 16)
1220
#pragma GCC diagnostic pop
1221
#endif
1222
#endif
954
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1223
955
/* This process had nothing to say at this time */
1224
proc = proc->next;
1225
956
continue;
1226
957
}
1227
958
/* Before reading, make the process' data buffer large enough */
1228
959
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1229
960
proc->buffer = realloc(proc->buffer, proc->buffer_size
1230
961
+ (size_t) BUFFER_SIZE);
1231
if(proc->buffer == NULL){
1232
error(0, errno, "malloc");
1233
exitstatus = EX_OSERR;
962
if (proc->buffer == NULL){
963
perror("malloc");
964
exitstatus = EXIT_FAILURE;
1234
965
goto fallback;
1235
966
}
1236
967
proc->buffer_size += BUFFER_SIZE;
1237
968
}
1238
969
/* Read from the process */
1239
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1240
proc->buffer
1241
+ proc->buffer_length,
1242
BUFFER_SIZE));
1243
if(sret < 0){
970
ret = read(proc->fd, proc->buffer + proc->buffer_length,
971
BUFFER_SIZE);
972
if(ret < 0){
1244
973
/* Read error from this process; ignore the error */
1245
proc = proc->next;
1246
974
continue;
1247
975
}
1248
if(sret == 0){
976
if(ret == 0){
1249
977
/* got EOF */
1250
978
proc->eof = true;
1251
979
} else {
1252
proc->buffer_length += (size_t) sret;
980
proc->buffer_length += (size_t) ret;
1253
981
}
1254
982
}
1255
983
}
1256
1257
984
985
1258
986
fallback:
1259
987
1260
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1261
and exitstatus != EX_OK)){
988
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1262
989
/* Fallback if all plugins failed, none are found or an error
1263
990
occured */
1264
991
bool bret;
1265
992
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1266
993
char *passwordbuffer = getpass("Password: ");
1267
size_t len = strlen(passwordbuffer);
1268
/* Strip trailing newline */
1269
if(len > 0 and passwordbuffer[len-1] == '\n'){
1270
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1271
len--;
1272
}
1273
bret = print_out_password(passwordbuffer, len);
994
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1274
995
if(not bret){
1275
error(0, errno, "print_out_password");
1276
exitstatus = EX_IOERR;
996
perror("print_out_password");
997
exitstatus = EXIT_FAILURE;
1277
998
}
1278
999
}
1279
1000
1280
1001
/* Restore old signal handler */
1281
1002
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1282
1003
if(ret == -1){
1283
error(0, errno, "sigaction");
1284
exitstatus = EX_OSERR;
1004
perror("sigaction");
1005
exitstatus = EXIT_FAILURE;
1285
1006
}
1286
1007
1287
1008
if(custom_argv != NULL){
1288
1009
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1289
1010
free(*arg);
1295
1016
closedir(dir);
1296
1017
}
1297
1018
1298
/* Kill the processes */
1019
/* Free the process list and kill the processes */
1299
1020
for(plugin *p = plugin_list; p != NULL; p = p->next){
1300
1021
if(p->pid != 0){
1301
1022
close(p->fd);
1302
1023
ret = kill(p->pid, SIGTERM);
1303
1024
if(ret == -1 and errno != ESRCH){
1304
1025
/* Set-uid proccesses might not get closed */
1305
error(0, errno, "kill");
1026
perror("kill");
1306
1027
}
1307
1028
}
1308
1029
}
1309
1030
1310
1031
/* Wait for any remaining child processes to terminate */
1311
do {
1032
do{
1312
1033
ret = wait(NULL);
1313
1034
} while(ret >= 0);
1314
1035
if(errno != ECHILD){
1315
error(0, errno, "wait");
1036
perror("wait");
1316
1037
}
1317
1038
1318
1039
free_plugin_list();
1319
1040
1320
1041
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0