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- Committer: Teddy Hogeborn
- Date: 2009-09-22 20:18:43 UTC
- Revision ID: teddy@fukt.bsnet.se-20090922201843-cd5uqnthf3eegg4l
* mandos (Client.start_checker): Bug fix: Fix race condition with
short intervals.
short intervals.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- etc-plugins.d-README
- 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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 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
27
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
29
EXIT_SUCCESS, realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
32
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
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
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
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() */
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() */
66
71
67
72
#define BUFFER_SIZE 256
68
73
69
74
#define PDIR "/lib/mandos/plugins.d"
70
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
76
72
const char *argp_program_version = "plugin-runner 1.0";
77
const char *argp_program_version = "plugin-runner " VERSION;
73
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
79
75
struct plugin;
76
77
80
typedef struct plugin{
78
81
char *name; /* can be NULL or any plugin name */
79
82
char **argv;
81
84
char **environ;
82
85
int envc;
83
86
bool disabled;
84
87
85
88
/* Variables used for running processes*/
86
89
pid_t pid;
87
90
int fd;
89
92
size_t buffer_size;
90
93
size_t buffer_length;
91
94
bool eof;
92
volatile bool completed;
93
volatile int status;
95
volatile sig_atomic_t completed;
96
int status;
94
97
struct plugin *next;
95
98
} plugin;
96
99
100
103
or if none is found, creates a new one */
101
104
static plugin *getplugin(char *name){
102
105
/* 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))){
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
if((p->name == name)
108
or (p->name and name and (strcmp(p->name, name) == 0))){
106
109
return p;
107
110
}
108
111
}
109
112
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
113
plugin *new_plugin = NULL;
114
do {
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
112
118
return NULL;
113
119
}
114
120
char *copy_name = NULL;
115
121
if(name != NULL){
116
copy_name = strdup(name);
122
do {
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
117
125
if(copy_name == NULL){
126
free(new_plugin);
118
127
return NULL;
119
128
}
120
129
}
121
130
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
131
*new_plugin = (plugin){ .name = copy_name,
132
.argc = 1,
133
.disabled = false,
134
.next = plugin_list };
126
135
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
136
do {
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
129
140
free(copy_name);
130
141
free(new_plugin);
131
142
return NULL;
133
144
new_plugin->argv[0] = copy_name;
134
145
new_plugin->argv[1] = NULL;
135
146
136
new_plugin->environ = malloc(sizeof(char *));
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
137
150
if(new_plugin->environ == NULL){
138
151
free(copy_name);
139
152
free(new_plugin->argv);
151
164
static bool add_to_char_array(const char *new, char ***array,
152
165
int *len){
153
166
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
156
171
/* Malloc check */
157
172
if(*array == NULL){
158
173
return false;
159
174
}
160
175
/* Make a copy of the new string */
161
char *copy = strdup(new);
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
162
180
if(copy == NULL){
163
181
return false;
164
182
}
190
208
if(strncmp(*e, def, namelen + 1) == 0){
191
209
/* It already exists */
192
210
if(replace){
193
char *new = realloc(*e, strlen(def) + 1);
211
char *new;
212
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
194
215
if(new == NULL){
195
216
return false;
196
217
}
206
227
/*
207
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
208
229
* Descriptor Flags".
209
* *Note File Descriptor Flags:(libc)Descriptor Flags.
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
210
231
*/
211
static int set_cloexec_flag(int fd)
212
{
213
int ret = fcntl(fd, F_GETFD, 0);
232
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
214
234
/* If reading the flags failed, return error indication now. */
215
235
if(ret < 0){
216
236
return ret;
217
237
}
218
238
/* Store modified flag word in the descriptor. */
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
ret | FD_CLOEXEC));
220
241
}
221
242
222
243
223
244
/* Mark processes as completed when they exit, and save their exit
224
245
status. */
225
void handle_sigchld(__attribute__((unused)) int sig){
246
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
226
248
while(true){
227
249
plugin *proc = plugin_list;
228
250
int status;
232
254
break;
233
255
}
234
256
if(pid == -1){
235
if (errno != ECHILD){
236
perror("waitpid");
257
if(errno == ECHILD){
258
/* No child processes */
259
break;
237
260
}
238
/* No child processes */
239
break;
261
perror("waitpid");
240
262
}
241
263
242
264
/* A child exited, find it in process_list */
248
270
continue;
249
271
}
250
272
proc->status = status;
251
proc->completed = true;
273
proc->completed = 1;
252
274
}
275
errno = old_errno;
253
276
}
254
277
255
278
/* Prints out a password to stdout */
256
bool print_out_password(const char *buffer, size_t length){
279
static bool print_out_password(const char *buffer, size_t length){
257
280
ssize_t ret;
258
281
for(size_t written = 0; written < length; written += (size_t)ret){
259
282
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
277
300
}
278
301
free(plugin_node->environ);
279
302
free(plugin_node->buffer);
280
303
281
304
/* Removes the plugin from the singly-linked list */
282
305
if(plugin_node == plugin_list){
283
306
/* First one - simple */
311
334
struct stat st;
312
335
fd_set rfds_all;
313
336
int ret, maxfd = 0;
337
ssize_t sret;
314
338
uid_t uid = 65534;
315
339
gid_t gid = 65534;
316
340
bool debug = false;
373
397
{ .name = NULL }
374
398
};
375
399
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
378
switch (key) {
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
402
switch(key){
403
char *tmp;
404
intmax_t tmpmax;
379
405
case 'g': /* --global-options */
380
if (arg != NULL){
381
char *p;
382
while((p = strsep(&arg, ",")) != NULL){
383
if(p[0] == '\0'){
406
if(arg != NULL){
407
char *plugin_option;
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
384
410
continue;
385
411
}
386
if(not add_argument(getplugin(NULL), p)){
412
if(not add_argument(getplugin(NULL), plugin_option)){
387
413
perror("add_argument");
388
414
return ARGP_ERR_UNKNOWN;
389
415
}
399
425
}
400
426
break;
401
427
case 'o': /* --options-for */
402
if (arg != NULL){
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0' or arg == NULL){
405
break;
406
}
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0' or opt == NULL){
409
break;
410
}
411
char *p;
412
while((p = strsep(&opt, ",")) != NULL){
413
if(p[0] == '\0'){
414
continue;
415
}
416
if(not add_argument(getplugin(p_name), p)){
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
417
436
perror("add_argument");
418
437
return ARGP_ERR_UNKNOWN;
419
438
}
436
455
}
437
456
break;
438
457
case 'd': /* --disable */
439
if (arg != NULL){
458
if(arg != NULL){
440
459
plugin *p = getplugin(arg);
441
460
if(p == NULL){
442
461
return ARGP_ERR_UNKNOWN;
445
464
}
446
465
break;
447
466
case 'e': /* --enable */
448
if (arg != NULL){
467
if(arg != NULL){
449
468
plugin *p = getplugin(arg);
450
469
if(p == NULL){
451
470
return ARGP_ERR_UNKNOWN;
458
477
plugindir = strdup(arg);
459
478
if(plugindir == NULL){
460
479
perror("strdup");
461
}
480
}
462
481
break;
463
482
case 129: /* --config-file */
464
483
/* This is already done by parse_opt_config_file() */
465
484
break;
466
485
case 130: /* --userid */
467
uid = (uid_t)strtol(arg, NULL, 10);
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
494
}
468
495
break;
469
496
case 131: /* --groupid */
470
gid = (gid_t)strtol(arg, NULL, 10);
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
505
}
471
506
break;
472
507
case 132: /* --debug */
473
508
debug = true;
474
509
break;
510
/*
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
513
*/
475
514
case ARGP_KEY_ARG:
476
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
515
/* Cryptsetup always passes an argument, which is an empty
516
string if "none" was specified in /etc/crypttab. So if
517
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
520
}
477
521
break;
478
522
case ARGP_KEY_END:
479
523
break;
485
529
486
530
/* This option parser is the same as parse_opt() above, except it
487
531
ignores everything but the --config-file option. */
488
error_t parse_opt_config_file (int key, char *arg,
489
__attribute__((unused))
490
struct argp_state *state) {
491
switch (key) {
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
535
switch(key){
492
536
case 'g': /* --global-options */
493
537
case 'G': /* --global-env */
494
538
case 'o': /* --options-for */
503
547
if(argfile == NULL){
504
548
perror("strdup");
505
549
}
506
break;
550
break;
507
551
case 130: /* --userid */
508
552
case 131: /* --groupid */
509
553
case 132: /* --debug */
521
565
.args_doc = "",
522
566
.doc = "Mandos plugin runner -- Run plugins" };
523
567
524
/* Parse using the parse_opt_config_file in order to get the custom
568
/* Parse using parse_opt_config_file() in order to get the custom
525
569
config file location, if any. */
526
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
527
if (ret == ARGP_ERR_UNKNOWN){
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
528
572
fprintf(stderr, "Unknown error while parsing arguments\n");
529
573
exitstatus = EXIT_FAILURE;
530
574
goto fallback;
534
578
argp.parser = parse_opt;
535
579
536
580
/* Open the configfile if available */
537
if (argfile == NULL){
581
if(argfile == NULL){
538
582
conffp = fopen(AFILE, "r");
539
583
} else {
540
584
conffp = fopen(argfile, "r");
541
}
585
}
542
586
if(conffp != NULL){
543
587
char *org_line = NULL;
544
588
char *p, *arg, *new_arg, *line;
545
589
size_t size = 0;
546
ssize_t sret;
547
590
const char whitespace_delims[] = " \r\t\f\v\n";
548
591
const char comment_delim[] = "#";
549
592
550
593
custom_argc = 1;
551
594
custom_argv = malloc(sizeof(char*) * 2);
552
595
if(custom_argv == NULL){
556
599
}
557
600
custom_argv[0] = argv[0];
558
601
custom_argv[1] = NULL;
559
602
560
603
/* for each line in the config file, strip whitespace and ignore
561
604
commented text */
562
605
while(true){
564
607
if(sret == -1){
565
608
break;
566
609
}
567
610
568
611
line = org_line;
569
612
arg = strsep(&line, comment_delim);
570
613
while((p = strsep(&arg, whitespace_delims)) != NULL){
589
632
goto fallback;
590
633
}
591
634
custom_argv[custom_argc-1] = new_arg;
592
custom_argv[custom_argc] = NULL;
635
custom_argv[custom_argc] = NULL;
593
636
}
594
637
}
638
do {
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
641
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
644
goto fallback;
645
}
595
646
free(org_line);
596
647
} else {
597
648
/* Check for harmful errors and go to fallback. Other errors might
598
649
not affect opening plugins */
599
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
600
651
perror("fopen");
601
652
exitstatus = EXIT_FAILURE;
602
653
goto fallback;
605
656
/* If there was any arguments from configuration file,
606
657
pass them to parser as command arguments */
607
658
if(custom_argv != NULL){
608
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
609
0, NULL);
610
if (ret == ARGP_ERR_UNKNOWN){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
611
662
fprintf(stderr, "Unknown error while parsing arguments\n");
612
663
exitstatus = EXIT_FAILURE;
613
664
goto fallback;
616
667
617
668
/* Parse actual command line arguments, to let them override the
618
669
config file */
619
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
620
if (ret == ARGP_ERR_UNKNOWN){
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
621
672
fprintf(stderr, "Unknown error while parsing arguments\n");
622
673
exitstatus = EXIT_FAILURE;
623
674
goto fallback;
630
681
for(char **a = p->argv; *a != NULL; a++){
631
682
fprintf(stderr, "\tArg: %s\n", *a);
632
683
}
633
fprintf(stderr, "...and %u environment variables\n", p->envc);
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
634
685
for(char **a = p->environ; *a != NULL; a++){
635
686
fprintf(stderr, "\t%s\n", *a);
636
687
}
638
689
}
639
690
640
691
/* Strip permissions down to nobody */
692
setgid(gid);
693
if(ret == -1){
694
perror("setgid");
695
}
641
696
ret = setuid(uid);
642
if (ret == -1){
697
if(ret == -1){
643
698
perror("setuid");
644
}
645
setgid(gid);
646
if (ret == -1){
647
perror("setgid");
648
699
}
649
700
650
if (plugindir == NULL){
701
if(plugindir == NULL){
651
702
dir = opendir(PDIR);
652
703
} else {
653
704
dir = opendir(plugindir);
676
727
677
728
/* Read and execute any executable in the plugin directory*/
678
729
while(true){
679
dirst = readdir(dir);
730
do {
731
dirst = readdir(dir);
732
} while(dirst == NULL and errno == EINTR);
680
733
681
734
/* All directory entries have been processed */
682
735
if(dirst == NULL){
683
if (errno == EBADF){
736
if(errno == EBADF){
684
737
perror("readdir");
685
738
exitstatus = EXIT_FAILURE;
686
739
goto fallback;
698
751
699
752
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
700
753
".dpkg-old",
754
".dpkg-bak",
701
755
".dpkg-divert", NULL };
702
756
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
703
757
size_t pre_len = strlen(*pre);
732
786
continue;
733
787
}
734
788
}
735
789
736
790
char *filename;
737
791
if(plugindir == NULL){
738
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
792
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
793
dirst->d_name));
739
794
} else {
740
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
795
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
796
plugindir,
797
dirst->d_name));
741
798
}
742
799
if(ret < 0){
743
800
perror("asprintf");
744
801
continue;
745
802
}
746
803
747
ret = stat(filename, &st);
748
if (ret == -1){
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
805
if(ret == -1){
749
806
perror("stat");
750
807
free(filename);
751
808
continue;
752
809
}
753
810
754
811
/* Ignore non-executable files */
755
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
812
if(not S_ISREG(st.st_mode)
813
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
756
814
if(debug){
757
815
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
758
816
" with bad type or mode\n", filename);
804
862
}
805
863
806
864
int pipefd[2];
807
ret = pipe(pipefd);
808
if (ret == -1){
865
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
866
if(ret == -1){
809
867
perror("pipe");
810
868
exitstatus = EXIT_FAILURE;
811
869
goto fallback;
824
882
goto fallback;
825
883
}
826
884
/* Block SIGCHLD until process is safely in process list */
827
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
885
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
886
&sigchld_action.sa_mask,
887
NULL));
828
888
if(ret < 0){
829
889
perror("sigprocmask");
830
890
exitstatus = EXIT_FAILURE;
831
891
goto fallback;
832
892
}
833
893
/* Starting a new process to be watched */
834
pid_t pid = fork();
894
pid_t pid;
895
do {
896
pid = fork();
897
} while(pid == -1 and errno == EINTR);
835
898
if(pid == -1){
836
899
perror("fork");
837
900
exitstatus = EXIT_FAILURE;
844
907
perror("sigaction");
845
908
_exit(EXIT_FAILURE);
846
909
}
847
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
848
911
if(ret < 0){
849
912
perror("sigprocmask");
850
913
_exit(EXIT_FAILURE);
851
914
}
852
915
853
916
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
854
917
if(ret == -1){
855
918
perror("dup2");
875
938
/* no return */
876
939
}
877
940
/* Parent process */
878
close(pipefd[1]); /* Close unused write end of pipe */
941
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
942
pipe */
879
943
free(filename);
880
944
plugin *new_plugin = getplugin(dirst->d_name);
881
if (new_plugin == NULL){
945
if(new_plugin == NULL){
882
946
perror("getplugin");
883
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
947
ret = (int)(TEMP_FAILURE_RETRY
948
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
949
NULL)));
884
950
if(ret < 0){
885
951
perror("sigprocmask");
886
952
}
893
959
894
960
/* Unblock SIGCHLD so signal handler can be run if this process
895
961
has already completed */
896
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
962
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
963
&sigchld_action.sa_mask,
964
NULL));
897
965
if(ret < 0){
898
966
perror("sigprocmask");
899
967
exitstatus = EXIT_FAILURE;
900
968
goto fallback;
901
969
}
902
970
903
FD_SET(new_plugin->fd, &rfds_all);
971
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
972
-Wconversion */
904
973
905
if (maxfd < new_plugin->fd){
974
if(maxfd < new_plugin->fd){
906
975
maxfd = new_plugin->fd;
907
976
}
908
909
977
}
910
978
911
closedir(dir);
979
TEMP_FAILURE_RETRY(closedir(dir));
912
980
dir = NULL;
913
981
free_plugin(getplugin(NULL));
982
914
983
for(plugin *p = plugin_list; p != NULL; p = p->next){
915
984
if(p->pid != 0){
916
985
break;
921
990
free_plugin_list();
922
991
}
923
992
}
924
993
925
994
/* Main loop while running plugins exist */
926
995
while(plugin_list){
927
996
fd_set rfds = rfds_all;
928
997
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
929
if (select_ret == -1){
998
if(select_ret == -1 and errno != EINTR){
930
999
perror("select");
931
1000
exitstatus = EXIT_FAILURE;
932
1001
goto fallback;
935
1004
from one of them */
936
1005
for(plugin *proc = plugin_list; proc != NULL;){
937
1006
/* Is this process completely done? */
938
if(proc->eof and proc->completed){
1007
if(proc->completed and proc->eof){
939
1008
/* Only accept the plugin output if it exited cleanly */
940
1009
if(not WIFEXITED(proc->status)
941
1010
or WEXITSTATUS(proc->status) != 0){
942
1011
/* Bad exit by plugin */
943
1012
944
1013
if(debug){
945
1014
if(WIFEXITED(proc->status)){
946
fprintf(stderr, "Plugin %u exited with status %d\n",
947
(unsigned int) (proc->pid),
1015
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1016
" status %d\n", proc->name,
1017
(intmax_t) (proc->pid),
948
1018
WEXITSTATUS(proc->status));
949
} else if(WIFSIGNALED(proc->status)) {
950
fprintf(stderr, "Plugin %u killed by signal %d\n",
951
(unsigned int) (proc->pid),
952
WTERMSIG(proc->status));
1019
} else if(WIFSIGNALED(proc->status)){
1020
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1021
" signal %d: %s\n", proc->name,
1022
(intmax_t) (proc->pid),
1023
WTERMSIG(proc->status),
1024
strsignal(WTERMSIG(proc->status)));
953
1025
} else if(WCOREDUMP(proc->status)){
954
fprintf(stderr, "Plugin %d dumped core\n",
955
(unsigned int) (proc->pid));
1026
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1027
" core\n", proc->name, (intmax_t) (proc->pid));
956
1028
}
957
1029
}
958
1030
959
1031
/* Remove the plugin */
960
FD_CLR(proc->fd, &rfds_all);
961
1032
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1033
-Wconversion */
1034
962
1035
/* Block signal while modifying process_list */
963
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1036
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1037
(SIG_BLOCK,
1038
&sigchld_action.sa_mask,
1039
NULL));
964
1040
if(ret < 0){
965
1041
perror("sigprocmask");
966
1042
exitstatus = EXIT_FAILURE;
967
1043
goto fallback;
968
1044
}
969
1045
1046
plugin *next_plugin = proc->next;
1047
free_plugin(proc);
1048
proc = next_plugin;
1049
970
1050
/* We are done modifying process list, so unblock signal */
971
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
972
NULL);
1051
ret = (int)(TEMP_FAILURE_RETRY
1052
(sigprocmask(SIG_UNBLOCK,
1053
&sigchld_action.sa_mask, NULL)));
973
1054
if(ret < 0){
974
1055
perror("sigprocmask");
975
1056
exitstatus = EXIT_FAILURE;
980
1061
break;
981
1062
}
982
1063
983
plugin *next_plugin = proc->next;
984
free_plugin(proc);
985
proc = next_plugin;
986
1064
continue;
987
1065
}
988
1066
989
1067
/* This process exited nicely, so print its buffer */
990
1068
991
1069
bool bret = print_out_password(proc->buffer,
992
1070
proc->buffer_length);
993
1071
if(not bret){
998
1076
}
999
1077
1000
1078
/* This process has not completed. Does it have any output? */
1001
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1079
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1080
warning from
1081
-Wconversion */
1002
1082
/* This process had nothing to say at this time */
1003
1083
proc = proc->next;
1004
1084
continue;
1007
1087
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1008
1088
proc->buffer = realloc(proc->buffer, proc->buffer_size
1009
1089
+ (size_t) BUFFER_SIZE);
1010
if (proc->buffer == NULL){
1090
if(proc->buffer == NULL){
1011
1091
perror("malloc");
1012
1092
exitstatus = EXIT_FAILURE;
1013
1093
goto fallback;
1015
1095
proc->buffer_size += BUFFER_SIZE;
1016
1096
}
1017
1097
/* Read from the process */
1018
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1019
BUFFER_SIZE);
1020
if(ret < 0){
1098
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1099
proc->buffer
1100
+ proc->buffer_length,
1101
BUFFER_SIZE));
1102
if(sret < 0){
1021
1103
/* Read error from this process; ignore the error */
1022
1104
proc = proc->next;
1023
1105
continue;
1024
1106
}
1025
if(ret == 0){
1107
if(sret == 0){
1026
1108
/* got EOF */
1027
1109
proc->eof = true;
1028
1110
} else {
1029
proc->buffer_length += (size_t) ret;
1111
proc->buffer_length += (size_t) sret;
1030
1112
}
1031
1113
}
1032
1114
}
1033
1034
1115
1116
1035
1117
fallback:
1036
1118
1037
1119
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1059
1141
perror("sigaction");
1060
1142
exitstatus = EXIT_FAILURE;
1061
1143
}
1062
1144
1063
1145
if(custom_argv != NULL){
1064
1146
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1065
1147
free(*arg);
1071
1153
closedir(dir);
1072
1154
}
1073
1155
1074
/* Free the process list and kill the processes */
1156
/* Kill the processes */
1075
1157
for(plugin *p = plugin_list; p != NULL; p = p->next){
1076
1158
if(p->pid != 0){
1077
1159
close(p->fd);
1084
1166
}
1085
1167
1086
1168
/* Wait for any remaining child processes to terminate */
1087
do{
1169
do {
1088
1170
ret = wait(NULL);
1089
1171
} while(ret >= 0);
1090
1172
if(errno != ECHILD){
1091
1173
perror("wait");
1092
1174
}
1093
1175
1094
1176
free_plugin_list();
1095
1177
1096
1178
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0