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- Committer: Teddy Hogeborn
- Date: 2014-03-10 07:04:09 UTC
- Revision ID: teddy@recompile.se-20140310070409-ho6p1wrnpopi2ny1
White space fix: change "if (" to "if(" in C code.
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
* plugins.d/askpass-fifo.c (error_plus): White space fix.
* plugins.d/password-prompt.c (error_plus, conflict_detection,
main): - '' -
* plugins.d/plymouth.c (error_plus, exec_and_wait, get_pid): - '' -
* plugins.d/splashy.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
- 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 © 2008-2013 Teddy Hogeborn
6
* Copyright © 2008-2013 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
99
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
136
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
126
141
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
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
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);
156
183
/* Malloc check */
157
if(*array == NULL){
184
if(new_array == NULL){
158
185
return false;
159
186
}
187
*array = new_array;
160
188
/* Make a copy of the new string */
161
char *copy = strdup(new);
189
char *copy;
190
do {
191
copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
162
193
if(copy == NULL){
163
194
return false;
164
195
}
171
202
}
172
203
173
204
/* Add to a plugin's argument vector */
205
__attribute__((nonnull(2)))
174
206
static bool add_argument(plugin *p, const char *arg){
175
207
if(p == NULL){
176
208
return false;
179
211
}
180
212
181
213
/* Add to a plugin's environment */
214
__attribute__((nonnull(2)))
182
215
static bool add_environment(plugin *p, const char *def, bool replace){
183
216
if(p == NULL){
184
217
return false;
186
219
/* namelen = length of name of environment variable */
187
220
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
221
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
222
for(char **envdef = p->environ; *envdef != NULL; envdef++){
223
if(strncmp(*envdef, def, namelen + 1) == 0){
191
224
/* It already exists */
192
225
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
194
if(new == NULL){
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){
195
231
return false;
196
232
}
197
*e = new;
198
strcpy(*e, def);
233
*envdef = new_envdef;
234
strcpy(*envdef, def);
199
235
}
200
236
return true;
201
237
}
206
242
/*
207
243
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
244
* Descriptor Flags".
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
245
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
246
*/
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
247
static int set_cloexec_flag(int fd){
248
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
249
/* If reading the flags failed, return error indication now. */
215
250
if(ret < 0){
216
251
return ret;
217
252
}
218
253
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
254
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
255
ret | FD_CLOEXEC));
220
256
}
221
257
222
258
223
259
/* Mark processes as completed when they exit, and save their exit
224
260
status. */
225
void handle_sigchld(__attribute__((unused)) int sig){
261
static void handle_sigchld(__attribute__((unused)) int sig){
262
int old_errno = errno;
226
263
while(true){
227
264
plugin *proc = plugin_list;
228
265
int status;
232
269
break;
233
270
}
234
271
if(pid == -1){
235
if (errno != ECHILD){
236
perror("waitpid");
272
if(errno == ECHILD){
273
/* No child processes */
274
break;
237
275
}
238
/* No child processes */
239
break;
276
error(0, errno, "waitpid");
240
277
}
241
278
242
279
/* A child exited, find it in process_list */
248
285
continue;
249
286
}
250
287
proc->status = status;
251
proc->completed = true;
288
proc->completed = 1;
252
289
}
290
errno = old_errno;
253
291
}
254
292
255
293
/* Prints out a password to stdout */
256
bool print_out_password(const char *buffer, size_t length){
294
__attribute__((nonnull))
295
static bool print_out_password(const char *buffer, size_t length){
257
296
ssize_t ret;
258
if(length>0 and buffer[length-1] == '\n'){
259
length--;
260
}
261
297
for(size_t written = 0; written < length; written += (size_t)ret){
262
298
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
263
299
length - written));
269
305
}
270
306
271
307
/* Removes and free a plugin from the plugin list */
308
__attribute__((nonnull))
272
309
static void free_plugin(plugin *plugin_node){
273
310
274
311
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
280
317
}
281
318
free(plugin_node->environ);
282
319
free(plugin_node->buffer);
283
320
284
321
/* Removes the plugin from the singly-linked list */
285
322
if(plugin_node == plugin_list){
286
323
/* First one - simple */
314
351
struct stat st;
315
352
fd_set rfds_all;
316
353
int ret, maxfd = 0;
354
ssize_t sret;
317
355
uid_t uid = 65534;
318
356
gid_t gid = 65534;
319
357
bool debug = false;
328
366
sigemptyset(&sigchld_action.sa_mask);
329
367
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
330
368
if(ret == -1){
331
perror("sigaddset");
332
exitstatus = EXIT_FAILURE;
369
error(0, errno, "sigaddset");
370
exitstatus = EX_OSERR;
333
371
goto fallback;
334
372
}
335
373
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
336
374
if(ret == -1){
337
perror("sigaction");
338
exitstatus = EXIT_FAILURE;
375
error(0, errno, "sigaction");
376
exitstatus = EX_OSERR;
339
377
goto fallback;
340
378
}
341
379
373
411
.doc = "Group ID the plugins will run as", .group = 3 },
374
412
{ .name = "debug", .key = 132,
375
413
.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 },
376
423
{ .name = NULL }
377
424
};
378
425
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
381
switch (key) {
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;
382
432
case 'g': /* --global-options */
383
if (arg != NULL){
384
char *p;
385
while((p = strsep(&arg, ",")) != NULL){
386
if(p[0] == '\0'){
387
continue;
388
}
389
if(not add_argument(getplugin(NULL), p)){
390
perror("add_argument");
391
return ARGP_ERR_UNKNOWN;
433
{
434
char *plugin_option;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
437
break;
392
438
}
393
439
}
394
440
}
395
441
break;
396
442
case 'G': /* --global-env */
397
if(arg == NULL){
398
break;
399
}
400
{
401
char *envdef = strdup(arg);
402
if(envdef == NULL){
403
break;
404
}
405
if(not add_environment(getplugin(NULL), envdef, true)){
406
perror("add_environment");
407
}
408
}
443
add_environment(getplugin(NULL), arg, true);
409
444
break;
410
445
case 'o': /* --options-for */
411
if (arg != NULL){
412
char *p_name = strsep(&arg, ":");
413
if(p_name[0] == '\0' or arg == NULL){
414
break;
415
}
416
char *opt = strsep(&arg, ":");
417
if(opt[0] == '\0' or opt == NULL){
418
break;
419
}
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;
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;
428
464
}
429
465
}
430
466
}
431
467
break;
432
468
case 'E': /* --env-for */
433
if(arg == NULL){
434
break;
435
}
436
469
{
437
470
char *envdef = strchr(arg, ':');
438
471
if(envdef == NULL){
439
break;
440
}
441
char *p_name = strndup(arg, (size_t) (envdef-arg));
442
if(p_name == NULL){
443
break;
444
}
472
argp_error(state, "No colon in \"%s\"", arg);
473
errno = EINVAL;
474
break;
475
}
476
*envdef = '\0';
445
477
envdef++;
446
if(not add_environment(getplugin(p_name), envdef, true)){
447
perror("add_environment");
478
if(arg[0] == '\0'){
479
argp_error(state, "Empty plugin name");
480
errno = EINVAL;
481
break;
448
482
}
483
add_environment(getplugin(arg), envdef, true);
449
484
}
450
485
break;
451
486
case 'd': /* --disable */
452
if (arg != NULL){
487
{
453
488
plugin *p = getplugin(arg);
454
if(p == NULL){
455
return ARGP_ERR_UNKNOWN;
489
if(p != NULL){
490
p->disabled = true;
456
491
}
457
p->disabled = true;
458
492
}
459
493
break;
460
494
case 'e': /* --enable */
461
if (arg != NULL){
495
{
462
496
plugin *p = getplugin(arg);
463
if(p == NULL){
464
return ARGP_ERR_UNKNOWN;
497
if(p != NULL){
498
p->disabled = false;
465
499
}
466
p->disabled = false;
467
500
}
468
501
break;
469
502
case 128: /* --plugin-dir */
503
free(plugindir);
470
504
plugindir = strdup(arg);
471
if(plugindir == NULL){
472
perror("strdup");
473
}
474
505
break;
475
506
case 129: /* --config-file */
476
507
/* This is already done by parse_opt_config_file() */
477
508
break;
478
509
case 130: /* --userid */
479
uid = (uid_t)strtol(arg, NULL, 10);
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;
480
518
break;
481
519
case 131: /* --groupid */
482
gid = (gid_t)strtol(arg, NULL, 10);
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;
483
528
break;
484
529
case 132: /* --debug */
485
530
debug = true;
486
531
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
*/
487
550
case ARGP_KEY_ARG:
488
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
489
break;
490
case ARGP_KEY_END:
491
break;
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
}
492
557
default:
493
558
return ARGP_ERR_UNKNOWN;
494
559
}
495
return 0;
560
return errno; /* Set to 0 at start */
496
561
}
497
562
498
563
/* This option parser is the same as parse_opt() above, except it
499
564
ignores everything but the --config-file option. */
500
error_t parse_opt_config_file (int key, char *arg,
501
__attribute__((unused))
502
struct argp_state *state) {
503
switch (key) {
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){
504
570
case 'g': /* --global-options */
505
571
case 'G': /* --global-env */
506
572
case 'o': /* --options-for */
510
576
case 128: /* --plugin-dir */
511
577
break;
512
578
case 129: /* --config-file */
579
free(argfile);
513
580
argfile = strdup(arg);
514
if(argfile == NULL){
515
perror("strdup");
516
}
517
break;
581
break;
518
582
case 130: /* --userid */
519
583
case 131: /* --groupid */
520
584
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
521
588
case ARGP_KEY_ARG:
522
case ARGP_KEY_END:
523
589
break;
524
590
default:
525
591
return ARGP_ERR_UNKNOWN;
526
592
}
527
return 0;
593
return errno;
528
594
}
529
595
530
596
struct argp argp = { .options = options,
532
598
.args_doc = "",
533
599
.doc = "Mandos plugin runner -- Run plugins" };
534
600
535
/* Parse using the parse_opt_config_file in order to get the custom
601
/* Parse using parse_opt_config_file() in order to get the custom
536
602
config file location, if any. */
537
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
538
if (ret == ARGP_ERR_UNKNOWN){
539
fprintf(stderr, "Unknown error while parsing arguments\n");
540
exitstatus = EXIT_FAILURE;
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;
541
617
goto fallback;
542
618
}
543
619
545
621
argp.parser = parse_opt;
546
622
547
623
/* Open the configfile if available */
548
if (argfile == NULL){
624
if(argfile == NULL){
549
625
conffp = fopen(AFILE, "r");
550
626
} else {
551
627
conffp = fopen(argfile, "r");
552
}
628
}
553
629
if(conffp != NULL){
554
630
char *org_line = NULL;
555
631
char *p, *arg, *new_arg, *line;
556
632
size_t size = 0;
557
ssize_t sret;
558
633
const char whitespace_delims[] = " \r\t\f\v\n";
559
634
const char comment_delim[] = "#";
560
635
561
636
custom_argc = 1;
562
637
custom_argv = malloc(sizeof(char*) * 2);
563
638
if(custom_argv == NULL){
564
perror("malloc");
565
exitstatus = EXIT_FAILURE;
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
566
641
goto fallback;
567
642
}
568
643
custom_argv[0] = argv[0];
569
644
custom_argv[1] = NULL;
570
645
571
646
/* for each line in the config file, strip whitespace and ignore
572
647
commented text */
573
648
while(true){
575
650
if(sret == -1){
576
651
break;
577
652
}
578
653
579
654
line = org_line;
580
655
arg = strsep(&line, comment_delim);
581
656
while((p = strsep(&arg, whitespace_delims)) != NULL){
584
659
}
585
660
new_arg = strdup(p);
586
661
if(new_arg == NULL){
587
perror("strdup");
588
exitstatus = EXIT_FAILURE;
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
589
664
free(org_line);
590
665
goto fallback;
591
666
}
592
667
593
668
custom_argc += 1;
594
custom_argv = realloc(custom_argv, sizeof(char *)
595
* ((unsigned int) custom_argc + 1));
596
if(custom_argv == NULL){
597
perror("realloc");
598
exitstatus = EXIT_FAILURE;
599
free(org_line);
600
goto fallback;
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
}
601
682
}
602
683
custom_argv[custom_argc-1] = new_arg;
603
custom_argv[custom_argc] = NULL;
684
custom_argv[custom_argc] = NULL;
604
685
}
605
686
}
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
}
606
695
free(org_line);
607
696
} else {
608
697
/* Check for harmful errors and go to fallback. Other errors might
609
698
not affect opening plugins */
610
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
611
perror("fopen");
612
exitstatus = EXIT_FAILURE;
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
613
702
goto fallback;
614
703
}
615
704
}
616
/* If there was any arguments from configuration file,
617
pass them to parser as command arguments */
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
618
707
if(custom_argv != NULL){
619
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
620
0, NULL);
621
if (ret == ARGP_ERR_UNKNOWN){
622
fprintf(stderr, "Unknown error while parsing arguments\n");
623
exitstatus = EXIT_FAILURE;
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;
624
722
goto fallback;
625
723
}
626
724
}
627
725
628
726
/* Parse actual command line arguments, to let them override the
629
727
config file */
630
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
631
if (ret == ARGP_ERR_UNKNOWN){
632
fprintf(stderr, "Unknown error while parsing arguments\n");
633
exitstatus = EXIT_FAILURE;
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;
634
742
goto fallback;
635
743
}
636
744
641
749
for(char **a = p->argv; *a != NULL; a++){
642
750
fprintf(stderr, "\tArg: %s\n", *a);
643
751
}
644
fprintf(stderr, "...and %u environment variables\n", p->envc);
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
645
753
for(char **a = p->environ; *a != NULL; a++){
646
754
fprintf(stderr, "\t%s\n", *a);
647
755
}
648
756
}
649
757
}
650
758
651
/* Strip permissions down to nobody */
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
}
652
786
ret = setuid(uid);
653
if (ret == -1){
654
perror("setuid");
655
}
656
setgid(gid);
657
if (ret == -1){
658
perror("setgid");
659
}
660
661
if (plugindir == NULL){
662
dir = opendir(PDIR);
663
} else {
664
dir = opendir(plugindir);
665
}
666
667
if(dir == NULL){
668
perror("Could not open plugin dir");
669
exitstatus = EXIT_FAILURE;
670
goto fallback;
671
}
672
673
/* Set the FD_CLOEXEC flag on the directory, if possible */
787
if(ret == -1){
788
error(0, errno, "setuid");
789
}
790
791
/* Open plugin directory with close_on_exec flag */
674
792
{
675
int dir_fd = dirfd(dir);
676
if(dir_fd >= 0){
677
ret = set_cloexec_flag(dir_fd);
678
if(ret < 0){
679
perror("set_cloexec_flag");
680
exitstatus = EXIT_FAILURE;
681
goto fallback;
682
}
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;
683
834
}
684
835
}
685
836
687
838
688
839
/* Read and execute any executable in the plugin directory*/
689
840
while(true){
690
dirst = readdir(dir);
841
do {
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
691
844
692
845
/* All directory entries have been processed */
693
846
if(dirst == NULL){
694
if (errno == EBADF){
695
perror("readdir");
696
exitstatus = EXIT_FAILURE;
847
if(errno == EBADF){
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
697
850
goto fallback;
698
851
}
699
852
break;
705
858
{
706
859
bool bad_name = false;
707
860
708
const char const *bad_prefixes[] = { ".", "#", NULL };
861
const char * const bad_prefixes[] = { ".", "#", NULL };
709
862
710
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
863
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
711
864
".dpkg-old",
865
".dpkg-bak",
712
866
".dpkg-divert", NULL };
713
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
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
714
876
size_t pre_len = strlen(*pre);
715
877
if((d_name_len >= pre_len)
716
878
and strncmp((dirst->d_name), *pre, pre_len) == 0){
725
887
if(bad_name){
726
888
continue;
727
889
}
728
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
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
729
899
size_t suf_len = strlen(*suf);
730
900
if((d_name_len >= suf_len)
731
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
901
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
732
902
== 0)){
733
903
if(debug){
734
904
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
743
913
continue;
744
914
}
745
915
}
746
916
747
917
char *filename;
748
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
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
}
749
926
if(ret < 0){
750
perror("asprintf");
927
error(0, errno, "asprintf");
751
928
continue;
752
929
}
753
930
754
ret = stat(filename, &st);
755
if (ret == -1){
756
perror("stat");
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
932
if(ret == -1){
933
error(0, errno, "stat");
757
934
free(filename);
758
935
continue;
759
936
}
760
937
761
938
/* Ignore non-executable files */
762
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
939
if(not S_ISREG(st.st_mode)
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
763
941
if(debug){
764
942
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
765
943
" with bad type or mode\n", filename);
770
948
771
949
plugin *p = getplugin(dirst->d_name);
772
950
if(p == NULL){
773
perror("getplugin");
951
error(0, errno, "getplugin");
774
952
free(filename);
775
953
continue;
776
954
}
788
966
if(g != NULL){
789
967
for(char **a = g->argv + 1; *a != NULL; a++){
790
968
if(not add_argument(p, *a)){
791
perror("add_argument");
969
error(0, errno, "add_argument");
792
970
}
793
971
}
794
972
/* Add global environment variables */
795
973
for(char **e = g->environ; *e != NULL; e++){
796
974
if(not add_environment(p, *e, false)){
797
perror("add_environment");
975
error(0, errno, "add_environment");
798
976
}
799
977
}
800
978
}
805
983
if(p->environ[0] != NULL){
806
984
for(char **e = environ; *e != NULL; e++){
807
985
if(not add_environment(p, *e, false)){
808
perror("add_environment");
986
error(0, errno, "add_environment");
809
987
}
810
988
}
811
989
}
812
990
813
991
int pipefd[2];
814
ret = pipe(pipefd);
815
if (ret == -1){
816
perror("pipe");
817
exitstatus = EXIT_FAILURE;
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
if(ret == -1){
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
818
996
goto fallback;
819
997
}
820
998
/* Ask OS to automatic close the pipe on exec */
821
999
ret = set_cloexec_flag(pipefd[0]);
822
1000
if(ret < 0){
823
perror("set_cloexec_flag");
824
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
825
1003
goto fallback;
826
1004
}
827
1005
ret = set_cloexec_flag(pipefd[1]);
828
1006
if(ret < 0){
829
perror("set_cloexec_flag");
830
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
831
1009
goto fallback;
832
1010
}
833
1011
/* Block SIGCHLD until process is safely in process list */
834
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
1014
NULL));
835
1015
if(ret < 0){
836
perror("sigprocmask");
837
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
838
1018
goto fallback;
839
1019
}
840
1020
/* Starting a new process to be watched */
841
pid_t pid = fork();
1021
pid_t pid;
1022
do {
1023
pid = fork();
1024
} while(pid == -1 and errno == EINTR);
842
1025
if(pid == -1){
843
perror("fork");
844
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
845
1028
goto fallback;
846
1029
}
847
1030
if(pid == 0){
848
1031
/* this is the child process */
849
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
850
1033
if(ret < 0){
851
perror("sigaction");
852
_exit(EXIT_FAILURE);
1034
error(0, errno, "sigaction");
1035
_exit(EX_OSERR);
853
1036
}
854
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
855
1038
if(ret < 0){
856
perror("sigprocmask");
857
_exit(EXIT_FAILURE);
1039
error(0, errno, "sigprocmask");
1040
_exit(EX_OSERR);
858
1041
}
859
1042
860
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
861
1044
if(ret == -1){
862
perror("dup2");
863
_exit(EXIT_FAILURE);
1045
error(0, errno, "dup2");
1046
_exit(EX_OSERR);
864
1047
}
865
1048
866
1049
if(dirfd(dir) < 0){
870
1053
}
871
1054
if(p->environ[0] == NULL){
872
1055
if(execv(filename, p->argv) < 0){
873
perror("execv");
874
_exit(EXIT_FAILURE);
1056
error(0, errno, "execv for %s", filename);
1057
_exit(EX_OSERR);
875
1058
}
876
1059
} else {
877
1060
if(execve(filename, p->argv, p->environ) < 0){
878
perror("execve");
879
_exit(EXIT_FAILURE);
1061
error(0, errno, "execve for %s", filename);
1062
_exit(EX_OSERR);
880
1063
}
881
1064
}
882
1065
/* no return */
883
1066
}
884
1067
/* Parent process */
885
close(pipefd[1]); /* Close unused write end of pipe */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1069
pipe */
886
1070
free(filename);
887
1071
plugin *new_plugin = getplugin(dirst->d_name);
888
if (new_plugin == NULL){
889
perror("getplugin");
890
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
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)));
891
1077
if(ret < 0){
892
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
893
1079
}
894
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
895
1081
goto fallback;
896
1082
}
897
1083
900
1086
901
1087
/* Unblock SIGCHLD so signal handler can be run if this process
902
1088
has already completed */
903
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
1091
NULL));
904
1092
if(ret < 0){
905
perror("sigprocmask");
906
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
907
1095
goto fallback;
908
1096
}
909
1097
910
FD_SET(new_plugin->fd, &rfds_all);
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
911
1112
912
if (maxfd < new_plugin->fd){
1113
if(maxfd < new_plugin->fd){
913
1114
maxfd = new_plugin->fd;
914
1115
}
915
916
1116
}
917
1117
918
closedir(dir);
1118
TEMP_FAILURE_RETRY(closedir(dir));
919
1119
dir = NULL;
920
1120
free_plugin(getplugin(NULL));
1121
921
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
922
1123
if(p->pid != 0){
923
1124
break;
928
1129
free_plugin_list();
929
1130
}
930
1131
}
931
1132
932
1133
/* Main loop while running plugins exist */
933
1134
while(plugin_list){
934
1135
fd_set rfds = rfds_all;
935
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
936
if (select_ret == -1){
937
perror("select");
938
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
939
1140
goto fallback;
940
1141
}
941
1142
/* OK, now either a process completed, or something can be read
942
1143
from one of them */
943
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1144
for(plugin *proc = plugin_list; proc != NULL;){
944
1145
/* Is this process completely done? */
945
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
946
1147
/* Only accept the plugin output if it exited cleanly */
947
1148
if(not WIFEXITED(proc->status)
948
1149
or WEXITSTATUS(proc->status) != 0){
949
1150
/* Bad exit by plugin */
950
1151
951
1152
if(debug){
952
1153
if(WIFEXITED(proc->status)){
953
fprintf(stderr, "Plugin %u exited with status %d\n",
954
(unsigned int) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
955
1157
WEXITSTATUS(proc->status));
956
} else if(WIFSIGNALED(proc->status)) {
957
fprintf(stderr, "Plugin %u killed by signal %d\n",
958
(unsigned int) (proc->pid),
959
WTERMSIG(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)));
960
1164
} else if(WCOREDUMP(proc->status)){
961
fprintf(stderr, "Plugin %d dumped core\n",
962
(unsigned int) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
963
1167
}
964
1168
}
965
1169
966
1170
/* Remove the plugin */
967
FD_CLR(proc->fd, &rfds_all);
968
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
969
1186
/* Block signal while modifying process_list */
970
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1188
(SIG_BLOCK,
1189
&sigchld_action.sa_mask,
1190
NULL));
971
1191
if(ret < 0){
972
perror("sigprocmask");
973
exitstatus = EXIT_FAILURE;
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
974
1194
goto fallback;
975
1195
}
1196
1197
plugin *next_plugin = proc->next;
976
1198
free_plugin(proc);
1199
proc = next_plugin;
1200
977
1201
/* We are done modifying process list, so unblock signal */
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
NULL);
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
980
1205
if(ret < 0){
981
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
983
1208
goto fallback;
984
1209
}
985
1210
986
1211
if(plugin_list == NULL){
987
1212
break;
988
1213
}
1214
989
1215
continue;
990
1216
}
991
1217
992
1218
/* This process exited nicely, so print its buffer */
993
1219
994
1220
bool bret = print_out_password(proc->buffer,
995
1221
proc->buffer_length);
996
1222
if(not bret){
997
perror("print_out_password");
998
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
999
1225
}
1000
1226
goto fallback;
1001
1227
}
1002
1228
1003
1229
/* This process has not completed. Does it have any output? */
1004
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
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
1005
1247
/* This process had nothing to say at this time */
1248
proc = proc->next;
1006
1249
continue;
1007
1250
}
1008
1251
/* Before reading, make the process' data buffer large enough */
1009
1252
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1010
proc->buffer = realloc(proc->buffer, proc->buffer_size
1011
+ (size_t) BUFFER_SIZE);
1012
if (proc->buffer == NULL){
1013
perror("malloc");
1014
exitstatus = EXIT_FAILURE;
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;
1015
1258
goto fallback;
1016
1259
}
1260
proc->buffer = new_buffer;
1017
1261
proc->buffer_size += BUFFER_SIZE;
1018
1262
}
1019
1263
/* Read from the process */
1020
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1021
BUFFER_SIZE);
1022
if(ret < 0){
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1265
proc->buffer
1266
+ proc->buffer_length,
1267
BUFFER_SIZE));
1268
if(sret < 0){
1023
1269
/* Read error from this process; ignore the error */
1270
proc = proc->next;
1024
1271
continue;
1025
1272
}
1026
if(ret == 0){
1273
if(sret == 0){
1027
1274
/* got EOF */
1028
1275
proc->eof = true;
1029
1276
} else {
1030
proc->buffer_length += (size_t) ret;
1277
proc->buffer_length += (size_t) sret;
1031
1278
}
1032
1279
}
1033
1280
}
1034
1035
1281
1282
1036
1283
fallback:
1037
1284
1038
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1039
1287
/* Fallback if all plugins failed, none are found or an error
1040
1288
occured */
1041
1289
bool bret;
1042
1290
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1043
1291
char *passwordbuffer = getpass("Password: ");
1044
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
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);
1045
1299
if(not bret){
1046
perror("print_out_password");
1047
exitstatus = EXIT_FAILURE;
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
1048
1302
}
1049
1303
}
1050
1304
1051
1305
/* Restore old signal handler */
1052
1306
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1053
1307
if(ret == -1){
1054
perror("sigaction");
1055
exitstatus = EXIT_FAILURE;
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
1056
1310
}
1057
1311
1058
1312
if(custom_argv != NULL){
1059
1313
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1060
1314
free(*arg);
1066
1320
closedir(dir);
1067
1321
}
1068
1322
1069
/* Free the process list and kill the processes */
1323
/* Kill the processes */
1070
1324
for(plugin *p = plugin_list; p != NULL; p = p->next){
1071
1325
if(p->pid != 0){
1072
1326
close(p->fd);
1073
1327
ret = kill(p->pid, SIGTERM);
1074
1328
if(ret == -1 and errno != ESRCH){
1075
1329
/* Set-uid proccesses might not get closed */
1076
perror("kill");
1330
error(0, errno, "kill");
1077
1331
}
1078
1332
}
1079
1333
}
1080
1334
1081
1335
/* Wait for any remaining child processes to terminate */
1082
do{
1336
do {
1083
1337
ret = wait(NULL);
1084
1338
} while(ret >= 0);
1085
1339
if(errno != ECHILD){
1086
perror("wait");
1340
error(0, errno, "wait");
1087
1341
}
1088
1342
1089
1343
free_plugin_list();
1090
1344
1091
1345
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0