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- Committer: Teddy Hogeborn
- Date: 2012-05-05 09:20:23 UTC
- mfrom: (569.1.2 ctl-using-properties)
- Revision ID: teddy@recompile.se-20120505092023-es5pn711z02193ny
* mandos-ctl (main): Use D-Bus properties instead of methods.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- .bzrignore
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008-2012 Teddy Hogeborn
6
* Copyright © 2008-2012 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
20
21
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
22
23
*/
23
24
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
51
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
55
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
69
#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() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
78
#define PDIR "/lib/mandos/plugins.d"
70
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
80
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;
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
76
83
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
89
96
size_t buffer_size;
90
97
size_t buffer_length;
91
98
bool eof;
92
volatile bool completed;
93
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
97
104
static plugin *plugin_list = NULL;
98
105
99
/* Gets a existing plugin based on name,
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
101
108
static plugin *getplugin(char *name){
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))){
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))){
106
113
return p;
107
114
}
108
115
}
109
116
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
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){
112
122
return NULL;
113
123
}
114
124
char *copy_name = NULL;
115
125
if(name != NULL){
116
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
117
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
118
133
return NULL;
119
134
}
120
135
}
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){
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;
129
147
free(copy_name);
130
148
free(new_plugin);
149
errno = e;
131
150
return NULL;
132
151
}
133
152
new_plugin->argv[0] = copy_name;
134
153
new_plugin->argv[1] = NULL;
135
154
136
new_plugin->environ = malloc(sizeof(char *));
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
137
158
if(new_plugin->environ == NULL){
159
int e = errno;
138
160
free(copy_name);
139
161
free(new_plugin->argv);
140
162
free(new_plugin);
163
errno = e;
141
164
return NULL;
142
165
}
143
166
new_plugin->environ[0] = NULL;
148
171
}
149
172
150
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
151
175
static bool add_to_char_array(const char *new, char ***array,
152
176
int *len){
153
177
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
178
do {
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
156
182
/* Malloc check */
157
183
if(*array == NULL){
158
184
return false;
159
185
}
160
186
/* Make a copy of the new string */
161
char *copy = strdup(new);
187
char *copy;
188
do {
189
copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
162
191
if(copy == NULL){
163
192
return false;
164
193
}
171
200
}
172
201
173
202
/* Add to a plugin's argument vector */
203
__attribute__((nonnull(2)))
174
204
static bool add_argument(plugin *p, const char *arg){
175
205
if(p == NULL){
176
206
return false;
179
209
}
180
210
181
211
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def){
212
__attribute__((nonnull(2)))
213
static bool add_environment(plugin *p, const char *def, bool replace){
183
214
if(p == NULL){
184
215
return false;
185
216
}
187
218
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
219
/* Search for this environment variable */
189
220
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen+1) == 0){
191
/* Refuse to add an existing variable */
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
}
192
234
return true;
193
235
}
194
236
}
198
240
/*
199
241
* Based on the example in the GNU LibC manual chapter 13.13 "File
200
242
* Descriptor Flags".
201
* *Note File Descriptor Flags:(libc)Descriptor Flags.
243
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
202
244
*/
203
static int set_cloexec_flag(int fd)
204
{
205
int ret = fcntl(fd, F_GETFD, 0);
245
static int set_cloexec_flag(int fd){
246
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
206
247
/* If reading the flags failed, return error indication now. */
207
248
if(ret < 0){
208
249
return ret;
209
250
}
210
251
/* Store modified flag word in the descriptor. */
211
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
252
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
253
ret | FD_CLOEXEC));
212
254
}
213
255
214
256
215
257
/* Mark processes as completed when they exit, and save their exit
216
258
status. */
217
void handle_sigchld(__attribute__((unused)) int sig){
259
static void handle_sigchld(__attribute__((unused)) int sig){
260
int old_errno = errno;
218
261
while(true){
219
262
plugin *proc = plugin_list;
220
263
int status;
224
267
break;
225
268
}
226
269
if(pid == -1){
227
if (errno != ECHILD){
228
perror("waitpid");
270
if(errno == ECHILD){
271
/* No child processes */
272
break;
229
273
}
230
/* No child processes */
231
break;
274
error(0, errno, "waitpid");
232
275
}
233
276
234
277
/* A child exited, find it in process_list */
235
278
while(proc != NULL and proc->pid != pid){
236
279
proc = proc->next;
240
283
continue;
241
284
}
242
285
proc->status = status;
243
proc->completed = true;
286
proc->completed = 1;
244
287
}
288
errno = old_errno;
245
289
}
246
290
247
291
/* Prints out a password to stdout */
248
bool print_out_password(const char *buffer, size_t length){
292
__attribute__((nonnull))
293
static bool print_out_password(const char *buffer, size_t length){
249
294
ssize_t ret;
250
if(length>0 and buffer[length-1] == '\n'){
251
length--;
252
}
253
295
for(size_t written = 0; written < length; written += (size_t)ret){
254
296
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
255
297
length - written));
261
303
}
262
304
263
305
/* Removes and free a plugin from the plugin list */
306
__attribute__((nonnull))
264
307
static void free_plugin(plugin *plugin_node){
265
308
266
309
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
272
315
}
273
316
free(plugin_node->environ);
274
317
free(plugin_node->buffer);
275
318
276
319
/* Removes the plugin from the singly-linked list */
277
320
if(plugin_node == plugin_list){
278
321
/* First one - simple */
306
349
struct stat st;
307
350
fd_set rfds_all;
308
351
int ret, maxfd = 0;
352
ssize_t sret;
309
353
uid_t uid = 65534;
310
354
gid_t gid = 65534;
311
355
bool debug = false;
320
364
sigemptyset(&sigchld_action.sa_mask);
321
365
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
322
366
if(ret == -1){
323
perror("sigaddset");
324
exitstatus = EXIT_FAILURE;
367
error(0, errno, "sigaddset");
368
exitstatus = EX_OSERR;
325
369
goto fallback;
326
370
}
327
371
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
328
372
if(ret == -1){
329
perror("sigaction");
330
exitstatus = EXIT_FAILURE;
373
error(0, errno, "sigaction");
374
exitstatus = EX_OSERR;
331
375
goto fallback;
332
376
}
333
377
336
380
{ .name = "global-options", .key = 'g',
337
381
.arg = "OPTION[,OPTION[,...]]",
338
382
.doc = "Options passed to all plugins" },
339
{ .name = "global-env", .key = 'e',
383
{ .name = "global-env", .key = 'G',
340
384
.arg = "VAR=value",
341
385
.doc = "Environment variable passed to all plugins" },
342
386
{ .name = "options-for", .key = 'o',
343
387
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
344
388
.doc = "Options passed only to specified plugin" },
345
{ .name = "env-for", .key = 'f',
389
{ .name = "env-for", .key = 'E',
346
390
.arg = "PLUGIN:ENV=value",
347
391
.doc = "Environment variable passed to specified plugin" },
348
392
{ .name = "disable", .key = 'd',
349
393
.arg = "PLUGIN",
350
394
.doc = "Disable a specific plugin", .group = 1 },
395
{ .name = "enable", .key = 'e',
396
.arg = "PLUGIN",
397
.doc = "Enable a specific plugin", .group = 1 },
351
398
{ .name = "plugin-dir", .key = 128,
352
399
.arg = "DIRECTORY",
353
400
.doc = "Specify a different plugin directory", .group = 2 },
362
409
.doc = "Group ID the plugins will run as", .group = 3 },
363
410
{ .name = "debug", .key = 132,
364
411
.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 },
365
421
{ .name = NULL }
366
422
};
367
423
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) {
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;
373
430
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
}
391
431
{
392
char *envdef = strdup(arg);
393
if(envdef == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), envdef)){
397
perror("add_environment");
432
char *plugin_option;
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
435
break;
436
}
398
437
}
399
438
}
400
439
break;
440
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
442
break;
401
443
case 'o': /* --options-for */
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
}
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;
421
462
}
422
463
}
423
464
}
424
465
break;
425
case 'f': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
466
case 'E': /* --env-for */
429
467
{
430
468
char *envdef = strchr(arg, ':');
431
469
if(envdef == NULL){
432
break;
433
}
434
char *p_name = strndup(arg, (size_t) (envdef-arg));
435
if(p_name == NULL){
436
break;
437
}
470
argp_error(state, "No colon in \"%s\"", arg);
471
errno = EINVAL;
472
break;
473
}
474
*envdef = '\0';
438
475
envdef++;
439
if(not add_environment(getplugin(p_name), envdef)){
440
perror("add_environment");
476
if(arg[0] == '\0'){
477
argp_error(state, "Empty plugin name");
478
errno = EINVAL;
479
break;
441
480
}
481
add_environment(getplugin(arg), envdef, true);
442
482
}
443
483
break;
444
484
case 'd': /* --disable */
445
if (arg != NULL){
446
plugin *p = getplugin(arg);
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
449
}
450
p->disabled = true;
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
}
451
498
}
452
499
break;
453
500
case 128: /* --plugin-dir */
501
free(plugindir);
454
502
plugindir = strdup(arg);
455
if(plugindir == NULL){
456
perror("strdup");
457
}
458
break;
459
case 129: /* --config-file */
503
break;
504
case 129: /* --config-file */
505
/* This is already done by parse_opt_config_file() */
506
break;
507
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;
516
break;
517
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;
526
break;
527
case 132: /* --debug */
528
debug = true;
529
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);
460
578
argfile = strdup(arg);
461
if(argfile == NULL){
462
perror("strdup");
463
}
464
break;
579
break;
465
580
case 130: /* --userid */
466
uid = (uid_t)strtol(arg, NULL, 10);
467
break;
468
581
case 131: /* --groupid */
469
gid = (gid_t)strtol(arg, NULL, 10);
470
break;
471
582
case 132: /* --debug */
472
debug = true;
473
break;
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
474
586
case ARGP_KEY_ARG:
475
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
476
break;
477
case ARGP_KEY_END:
478
587
break;
479
588
default:
480
589
return ARGP_ERR_UNKNOWN;
481
590
}
482
return 0;
591
return errno;
483
592
}
484
593
485
struct argp argp = { .options = options, .parser = parse_opt,
486
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
594
struct argp argp = { .options = options,
595
.parser = parse_opt_config_file,
596
.args_doc = "",
487
597
.doc = "Mandos plugin runner -- Run plugins" };
488
598
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;
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;
493
615
goto fallback;
494
616
}
495
496
/* Opens the configfile if aviable */
497
if (argfile == NULL){
617
618
/* Reset to the normal argument parser */
619
argp.parser = parse_opt;
620
621
/* Open the configfile if available */
622
if(argfile == NULL){
498
623
conffp = fopen(AFILE, "r");
499
624
} else {
500
625
conffp = fopen(argfile, "r");
501
}
626
}
502
627
if(conffp != NULL){
503
628
char *org_line = NULL;
504
629
char *p, *arg, *new_arg, *line;
505
630
size_t size = 0;
506
ssize_t sret;
507
631
const char whitespace_delims[] = " \r\t\f\v\n";
508
632
const char comment_delim[] = "#";
509
633
510
634
custom_argc = 1;
511
635
custom_argv = malloc(sizeof(char*) * 2);
512
636
if(custom_argv == NULL){
513
perror("malloc");
514
exitstatus = EXIT_FAILURE;
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
515
639
goto fallback;
516
640
}
517
641
custom_argv[0] = argv[0];
518
642
custom_argv[1] = NULL;
519
643
520
644
/* for each line in the config file, strip whitespace and ignore
521
645
commented text */
522
646
while(true){
524
648
if(sret == -1){
525
649
break;
526
650
}
527
651
528
652
line = org_line;
529
653
arg = strsep(&line, comment_delim);
530
654
while((p = strsep(&arg, whitespace_delims)) != NULL){
533
657
}
534
658
new_arg = strdup(p);
535
659
if(new_arg == NULL){
536
perror("strdup");
537
exitstatus = EXIT_FAILURE;
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
538
662
free(org_line);
539
663
goto fallback;
540
664
}
543
667
custom_argv = realloc(custom_argv, sizeof(char *)
544
668
* ((unsigned int) custom_argc + 1));
545
669
if(custom_argv == NULL){
546
perror("realloc");
547
exitstatus = EXIT_FAILURE;
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
548
672
free(org_line);
549
673
goto fallback;
550
674
}
551
675
custom_argv[custom_argc-1] = new_arg;
552
custom_argv[custom_argc] = NULL;
676
custom_argv[custom_argc] = NULL;
553
677
}
554
678
}
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
}
555
687
free(org_line);
556
} else{
688
} else {
557
689
/* Check for harmful errors and go to fallback. Other errors might
558
690
not affect opening plugins */
559
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
560
perror("fopen");
561
exitstatus = EXIT_FAILURE;
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
562
694
goto fallback;
563
695
}
564
696
}
565
/* If there was any arguments from configuration file,
566
pass them to parser as command arguments */
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
567
699
if(custom_argv != NULL){
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;
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;
572
714
goto fallback;
573
715
}
574
716
}
575
717
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
576
737
if(debug){
577
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
578
739
fprintf(stderr, "Plugin: %s has %d arguments\n",
580
741
for(char **a = p->argv; *a != NULL; a++){
581
742
fprintf(stderr, "\tArg: %s\n", *a);
582
743
}
583
fprintf(stderr, "...and %u environment variables\n", p->envc);
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
584
745
for(char **a = p->environ; *a != NULL; a++){
585
746
fprintf(stderr, "\t%s\n", *a);
586
747
}
587
748
}
588
749
}
589
590
/* Strip permissions down to nobody */
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
setgid(gid);
775
if(ret == -1){
776
error(0, errno, "setgid");
777
}
591
778
ret = setuid(uid);
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 */
779
if(ret == -1){
780
error(0, errno, "setuid");
781
}
782
783
/* Open plugin directory with close_on_exec flag */
613
784
{
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
}
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;
622
826
}
623
827
}
624
828
625
829
FD_ZERO(&rfds_all);
626
830
627
831
/* Read and execute any executable in the plugin directory*/
628
832
while(true){
629
dirst = readdir(dir);
833
do {
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
630
836
631
// All directory entries have been processed
837
/* All directory entries have been processed */
632
838
if(dirst == NULL){
633
if (errno == EBADF){
634
perror("readdir");
635
exitstatus = EXIT_FAILURE;
839
if(errno == EBADF){
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
636
842
goto fallback;
637
843
}
638
844
break;
640
846
641
847
d_name_len = strlen(dirst->d_name);
642
848
643
// Ignore dotfiles, backup files and other junk
849
/* Ignore dotfiles, backup files and other junk */
644
850
{
645
851
bool bad_name = false;
646
852
648
854
649
855
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
650
856
".dpkg-old",
857
".dpkg-bak",
651
858
".dpkg-divert", NULL };
652
859
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
653
860
size_t pre_len = strlen(*pre);
667
874
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
668
875
size_t suf_len = strlen(*suf);
669
876
if((d_name_len >= suf_len)
670
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
877
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
671
878
== 0)){
672
879
if(debug){
673
880
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
682
889
continue;
683
890
}
684
891
}
685
892
686
893
char *filename;
687
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
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
}
688
902
if(ret < 0){
689
perror("asprintf");
903
error(0, errno, "asprintf");
690
904
continue;
691
905
}
692
906
693
ret = stat(filename, &st);
694
if (ret == -1){
695
perror("stat");
907
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
908
if(ret == -1){
909
error(0, errno, "stat");
696
910
free(filename);
697
911
continue;
698
912
}
699
913
700
914
/* Ignore non-executable files */
701
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
915
if(not S_ISREG(st.st_mode)
916
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
702
917
if(debug){
703
918
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
704
919
" with bad type or mode\n", filename);
709
924
710
925
plugin *p = getplugin(dirst->d_name);
711
926
if(p == NULL){
712
perror("getplugin");
927
error(0, errno, "getplugin");
713
928
free(filename);
714
929
continue;
715
930
}
727
942
if(g != NULL){
728
943
for(char **a = g->argv + 1; *a != NULL; a++){
729
944
if(not add_argument(p, *a)){
730
perror("add_argument");
945
error(0, errno, "add_argument");
731
946
}
732
947
}
733
948
/* Add global environment variables */
734
949
for(char **e = g->environ; *e != NULL; e++){
735
if(not add_environment(p, *e)){
736
perror("add_environment");
950
if(not add_environment(p, *e, false)){
951
error(0, errno, "add_environment");
737
952
}
738
953
}
739
954
}
743
958
process, too. */
744
959
if(p->environ[0] != NULL){
745
960
for(char **e = environ; *e != NULL; e++){
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");
961
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
753
963
}
754
964
}
755
965
}
756
966
757
967
int pipefd[2];
758
ret = pipe(pipefd);
759
if (ret == -1){
760
perror("pipe");
761
exitstatus = EXIT_FAILURE;
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
969
if(ret == -1){
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
762
972
goto fallback;
763
973
}
764
974
/* Ask OS to automatic close the pipe on exec */
765
975
ret = set_cloexec_flag(pipefd[0]);
766
976
if(ret < 0){
767
perror("set_cloexec_flag");
768
exitstatus = EXIT_FAILURE;
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
769
979
goto fallback;
770
980
}
771
981
ret = set_cloexec_flag(pipefd[1]);
772
982
if(ret < 0){
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
775
985
goto fallback;
776
986
}
777
987
/* Block SIGCHLD until process is safely in process list */
778
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
&sigchld_action.sa_mask,
990
NULL));
779
991
if(ret < 0){
780
perror("sigprocmask");
781
exitstatus = EXIT_FAILURE;
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
782
994
goto fallback;
783
995
}
784
// Starting a new process to be watched
785
pid_t pid = fork();
996
/* Starting a new process to be watched */
997
pid_t pid;
998
do {
999
pid = fork();
1000
} while(pid == -1 and errno == EINTR);
786
1001
if(pid == -1){
787
perror("fork");
788
exitstatus = EXIT_FAILURE;
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
789
1004
goto fallback;
790
1005
}
791
1006
if(pid == 0){
792
1007
/* this is the child process */
793
1008
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
794
1009
if(ret < 0){
795
perror("sigaction");
796
_exit(EXIT_FAILURE);
1010
error(0, errno, "sigaction");
1011
_exit(EX_OSERR);
797
1012
}
798
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
799
1014
if(ret < 0){
800
perror("sigprocmask");
801
_exit(EXIT_FAILURE);
1015
error(0, errno, "sigprocmask");
1016
_exit(EX_OSERR);
802
1017
}
803
1018
804
1019
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
805
1020
if(ret == -1){
806
perror("dup2");
807
_exit(EXIT_FAILURE);
1021
error(0, errno, "dup2");
1022
_exit(EX_OSERR);
808
1023
}
809
1024
810
1025
if(dirfd(dir) < 0){
814
1029
}
815
1030
if(p->environ[0] == NULL){
816
1031
if(execv(filename, p->argv) < 0){
817
perror("execv");
818
_exit(EXIT_FAILURE);
1032
error(0, errno, "execv for %s", filename);
1033
_exit(EX_OSERR);
819
1034
}
820
1035
} else {
821
1036
if(execve(filename, p->argv, p->environ) < 0){
822
perror("execve");
823
_exit(EXIT_FAILURE);
1037
error(0, errno, "execve for %s", filename);
1038
_exit(EX_OSERR);
824
1039
}
825
1040
}
826
1041
/* no return */
827
1042
}
828
1043
/* Parent process */
829
close(pipefd[1]); /* Close unused write end of pipe */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1045
pipe */
830
1046
free(filename);
831
1047
plugin *new_plugin = getplugin(dirst->d_name);
832
if (new_plugin == NULL){
833
perror("getplugin");
834
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
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)));
835
1053
if(ret < 0){
836
perror("sigprocmask");
1054
error(0, errno, "sigprocmask");
837
1055
}
838
exitstatus = EXIT_FAILURE;
1056
exitstatus = EX_OSERR;
839
1057
goto fallback;
840
1058
}
841
1059
844
1062
845
1063
/* Unblock SIGCHLD so signal handler can be run if this process
846
1064
has already completed */
847
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
1067
NULL));
848
1068
if(ret < 0){
849
perror("sigprocmask");
850
exitstatus = EXIT_FAILURE;
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
851
1071
goto fallback;
852
1072
}
853
1073
854
FD_SET(new_plugin->fd, &rfds_all);
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1075
-Wconversion */
855
1076
856
if (maxfd < new_plugin->fd){
1077
if(maxfd < new_plugin->fd){
857
1078
maxfd = new_plugin->fd;
858
1079
}
859
860
1080
}
861
1081
862
closedir(dir);
1082
TEMP_FAILURE_RETRY(closedir(dir));
863
1083
dir = NULL;
864
1084
free_plugin(getplugin(NULL));
1085
865
1086
for(plugin *p = plugin_list; p != NULL; p = p->next){
866
1087
if(p->pid != 0){
867
1088
break;
872
1093
free_plugin_list();
873
1094
}
874
1095
}
875
1096
876
1097
/* Main loop while running plugins exist */
877
1098
while(plugin_list){
878
1099
fd_set rfds = rfds_all;
879
1100
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
880
if (select_ret == -1){
881
perror("select");
882
exitstatus = EXIT_FAILURE;
1101
if(select_ret == -1 and errno != EINTR){
1102
error(0, errno, "select");
1103
exitstatus = EX_OSERR;
883
1104
goto fallback;
884
1105
}
885
1106
/* OK, now either a process completed, or something can be read
886
1107
from one of them */
887
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1108
for(plugin *proc = plugin_list; proc != NULL;){
888
1109
/* Is this process completely done? */
889
if(proc->eof and proc->completed){
1110
if(proc->completed and proc->eof){
890
1111
/* Only accept the plugin output if it exited cleanly */
891
1112
if(not WIFEXITED(proc->status)
892
1113
or WEXITSTATUS(proc->status) != 0){
893
1114
/* Bad exit by plugin */
894
1115
895
1116
if(debug){
896
1117
if(WIFEXITED(proc->status)){
897
fprintf(stderr, "Plugin %u exited with status %d\n",
898
(unsigned int) (proc->pid),
1118
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1119
" status %d\n", proc->name,
1120
(intmax_t) (proc->pid),
899
1121
WEXITSTATUS(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));
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)));
904
1128
} else if(WCOREDUMP(proc->status)){
905
fprintf(stderr, "Plugin %d dumped core\n",
906
(unsigned int) (proc->pid));
1129
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1130
" core\n", proc->name, (intmax_t) (proc->pid));
907
1131
}
908
1132
}
909
1133
910
1134
/* Remove the plugin */
911
FD_CLR(proc->fd, &rfds_all);
912
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1136
-Wconversion */
1137
913
1138
/* Block signal while modifying process_list */
914
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1139
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1140
(SIG_BLOCK,
1141
&sigchld_action.sa_mask,
1142
NULL));
915
1143
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1144
error(0, errno, "sigprocmask");
1145
exitstatus = EX_OSERR;
918
1146
goto fallback;
919
1147
}
1148
1149
plugin *next_plugin = proc->next;
920
1150
free_plugin(proc);
1151
proc = next_plugin;
1152
921
1153
/* We are done modifying process list, so unblock signal */
922
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
923
NULL);
1154
ret = (int)(TEMP_FAILURE_RETRY
1155
(sigprocmask(SIG_UNBLOCK,
1156
&sigchld_action.sa_mask, NULL)));
924
1157
if(ret < 0){
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1158
error(0, errno, "sigprocmask");
1159
exitstatus = EX_OSERR;
927
1160
goto fallback;
928
1161
}
929
1162
930
1163
if(plugin_list == NULL){
931
1164
break;
932
1165
}
1166
933
1167
continue;
934
1168
}
935
1169
936
1170
/* This process exited nicely, so print its buffer */
937
1171
938
1172
bool bret = print_out_password(proc->buffer,
939
1173
proc->buffer_length);
940
1174
if(not bret){
941
perror("print_out_password");
942
exitstatus = EXIT_FAILURE;
1175
error(0, errno, "print_out_password");
1176
exitstatus = EX_IOERR;
943
1177
}
944
1178
goto fallback;
945
1179
}
946
1180
947
1181
/* This process has not completed. Does it have any output? */
948
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1182
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1183
warning from
1184
-Wconversion */
949
1185
/* This process had nothing to say at this time */
1186
proc = proc->next;
950
1187
continue;
951
1188
}
952
1189
/* Before reading, make the process' data buffer large enough */
953
1190
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
954
1191
proc->buffer = realloc(proc->buffer, proc->buffer_size
955
1192
+ (size_t) BUFFER_SIZE);
956
if (proc->buffer == NULL){
957
perror("malloc");
958
exitstatus = EXIT_FAILURE;
1193
if(proc->buffer == NULL){
1194
error(0, errno, "malloc");
1195
exitstatus = EX_OSERR;
959
1196
goto fallback;
960
1197
}
961
1198
proc->buffer_size += BUFFER_SIZE;
962
1199
}
963
1200
/* Read from the process */
964
ret = read(proc->fd, proc->buffer + proc->buffer_length,
965
BUFFER_SIZE);
966
if(ret < 0){
1201
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1202
proc->buffer
1203
+ proc->buffer_length,
1204
BUFFER_SIZE));
1205
if(sret < 0){
967
1206
/* Read error from this process; ignore the error */
1207
proc = proc->next;
968
1208
continue;
969
1209
}
970
if(ret == 0){
1210
if(sret == 0){
971
1211
/* got EOF */
972
1212
proc->eof = true;
973
1213
} else {
974
proc->buffer_length += (size_t) ret;
1214
proc->buffer_length += (size_t) sret;
975
1215
}
976
1216
}
977
1217
}
978
979
1218
1219
980
1220
fallback:
981
1221
982
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1222
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1223
and exitstatus != EX_OK)){
983
1224
/* Fallback if all plugins failed, none are found or an error
984
1225
occured */
985
1226
bool bret;
986
1227
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
987
1228
char *passwordbuffer = getpass("Password: ");
988
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
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);
989
1236
if(not bret){
990
perror("print_out_password");
991
exitstatus = EXIT_FAILURE;
1237
error(0, errno, "print_out_password");
1238
exitstatus = EX_IOERR;
992
1239
}
993
1240
}
994
1241
995
1242
/* Restore old signal handler */
996
1243
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
997
1244
if(ret == -1){
998
perror("sigaction");
999
exitstatus = EXIT_FAILURE;
1245
error(0, errno, "sigaction");
1246
exitstatus = EX_OSERR;
1000
1247
}
1001
1248
1002
1249
if(custom_argv != NULL){
1003
1250
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1004
1251
free(*arg);
1010
1257
closedir(dir);
1011
1258
}
1012
1259
1013
/* Free the process list and kill the processes */
1260
/* Kill the processes */
1014
1261
for(plugin *p = plugin_list; p != NULL; p = p->next){
1015
1262
if(p->pid != 0){
1016
1263
close(p->fd);
1017
1264
ret = kill(p->pid, SIGTERM);
1018
1265
if(ret == -1 and errno != ESRCH){
1019
1266
/* Set-uid proccesses might not get closed */
1020
perror("kill");
1267
error(0, errno, "kill");
1021
1268
}
1022
1269
}
1023
1270
}
1024
1271
1025
1272
/* Wait for any remaining child processes to terminate */
1026
do{
1273
do {
1027
1274
ret = wait(NULL);
1028
1275
} while(ret >= 0);
1029
1276
if(errno != ECHILD){
1030
perror("wait");
1277
error(0, errno, "wait");
1031
1278
}
1032
1279
1033
1280
free_plugin_list();
1034
1281
1035
1282
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0