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- Committer: Björn Påhlsson
- Date: 2008-08-09 20:07:37 UTC
- mfrom: (54 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 56.
- Revision ID: belorn@braxen-20080809200737-nkb9rigetzv0ew60
merge
- files added:
- network-protocol.txt
- files removed:
- COPYING
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- files modified:
- Makefile
added
removed
mandos-client.c
21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
22
*/
23
23
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
26
26
#include <stddef.h> /* size_t, NULL */
27
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
28
EXIT_SUCCESS, realloc() */
51
51
close() */
52
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
53
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
54
#include <string.h> /* strtok, strlen(), strcpy(),
55
strcat() */
55
56
#include <errno.h> /* errno */
56
57
#include <argp.h> /* struct argp_option, struct
57
58
argp_state, struct argp,
58
59
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
error_t */
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
61
61
#include <signal.h> /* struct sigaction, sigemptyset(),
62
62
sigaddset(), sigaction(),
63
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
65
#include <errno.h> /* errno, EBADF */
66
66
67
67
#define BUFFER_SIZE 256
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
70
const char *argp_program_version = "plugin-runner 1.0";
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
72
68
73
69
struct process;
74
70
79
75
size_t buffer_size;
80
76
size_t buffer_length;
81
77
bool eof;
82
volatile bool completed;
83
volatile int status;
78
bool completed;
79
int status;
84
80
struct process *next;
85
81
} process;
86
82
88
84
char *name; /* can be NULL or any plugin name */
89
85
char **argv;
90
86
int argc;
91
char **environ;
92
int envc;
93
87
bool disabled;
94
88
struct plugin *next;
95
89
} plugin;
104
98
/* Create a new plugin */
105
99
plugin *new_plugin = malloc(sizeof(plugin));
106
100
if (new_plugin == NULL){
107
return NULL;
108
}
109
char *copy_name = NULL;
110
if(name != NULL){
111
copy_name = strdup(name);
112
if(copy_name == NULL){
113
return NULL;
114
}
115
}
116
117
*new_plugin = (plugin) { .name = copy_name,
118
.argc = 1,
119
.envc = 0,
120
.disabled = false,
121
.next = *plugin_list };
122
101
perror("malloc");
102
exit(EXIT_FAILURE);
103
}
104
new_plugin->name = name;
123
105
new_plugin->argv = malloc(sizeof(char *) * 2);
124
106
if (new_plugin->argv == NULL){
125
free(copy_name);
126
free(new_plugin);
127
return NULL;
107
perror("malloc");
108
exit(EXIT_FAILURE);
128
109
}
129
new_plugin->argv[0] = copy_name;
110
new_plugin->argv[0] = name;
130
111
new_plugin->argv[1] = NULL;
131
132
new_plugin->environ = malloc(sizeof(char *));
133
if(new_plugin->environ == NULL){
134
free(copy_name);
135
free(new_plugin->argv);
136
free(new_plugin);
137
return NULL;
138
}
139
new_plugin->environ[0] = NULL;
112
new_plugin->argc = 1;
113
new_plugin->disabled = false;
114
new_plugin->next = *plugin_list;
140
115
/* Append the new plugin to the list */
141
116
*plugin_list = new_plugin;
142
117
return new_plugin;
143
118
}
144
119
145
/* Helper function for add_argument and add_environment */
146
static bool add_to_char_array(const char *new, char ***array,
147
int *len){
148
/* Resize the pointed-to array to hold one more pointer */
149
*array = realloc(*array, sizeof(char *)
150
* (size_t) ((*len) + 2));
151
/* Malloc check */
152
if(*array == NULL){
153
return false;
154
}
155
/* Make a copy of the new string */
156
char *copy = strdup(new);
157
if(copy == NULL){
158
return false;
159
}
160
/* Insert the copy */
161
(*array)[*len] = copy;
162
(*len)++;
163
/* Add a new terminating NULL pointer to the last element */
164
(*array)[*len] = NULL;
165
return true;
166
}
167
168
/* Add to a plugin's argument vector */
169
static bool add_argument(plugin *p, const char *arg){
170
if(p == NULL){
171
return false;
172
}
173
return add_to_char_array(arg, &(p->argv), &(p->argc));
174
}
175
176
/* Add to a plugin's environment */
177
static bool add_environment(plugin *p, const char *def){
178
if(p == NULL){
179
return false;
180
}
181
return add_to_char_array(def, &(p->environ), &(p->envc));
182
}
183
120
static void addargument(plugin *p, char *arg){
121
p->argv[p->argc] = arg;
122
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
123
if (p->argv == NULL){
124
perror("malloc");
125
exit(EXIT_FAILURE);
126
}
127
p->argc++;
128
p->argv[p->argc] = NULL;
129
}
184
130
185
131
/*
186
132
* Based on the example in the GNU LibC manual chapter 13.13 "File
198
144
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
199
145
}
200
146
147
const char *argp_program_version = "plugbasedclient 0.9";
148
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
149
201
150
process *process_list = NULL;
202
151
203
/* Mark processes as completed when they exit, and save their exit
152
/* Mark a process as completed when it exits, and save its exit
204
153
status. */
205
154
void handle_sigchld(__attribute__((unused)) int sig){
206
while(true){
207
process *proc = process_list;
208
int status;
209
pid_t pid = waitpid(-1, &status, WNOHANG);
210
if(pid == 0){
211
/* Only still running child processes */
212
break;
213
}
214
if(pid == -1){
215
if (errno != ECHILD){
216
perror("waitpid");
217
}
218
/* No child processes */
219
break;
220
}
221
222
/* A child exited, find it in process_list */
223
while(proc != NULL and proc->pid != pid){
224
proc = proc->next;
225
}
226
if(proc == NULL){
227
/* Process not found in process list */
228
continue;
229
}
230
proc->status = status;
231
proc->completed = true;
232
}
233
}
234
235
bool print_out_password(const char *buffer, size_t length){
236
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
240
for(size_t written = 0; written < length; written += (size_t)ret){
241
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
242
length - written));
243
if(ret < 0){
244
return false;
245
}
246
}
247
return true;
248
}
249
250
char **add_to_argv(char **argv, int *argc, char *arg){
251
if (argv == NULL){
252
*argc = 1;
253
argv = malloc(sizeof(char*) * 2);
254
if(argv == NULL){
255
return NULL;
256
}
257
argv[0] = NULL; /* Will be set to argv[0] in main before
258
parsing */
259
argv[1] = NULL;
260
}
261
*argc += 1;
262
argv = realloc(argv, sizeof(char *)
263
* ((unsigned int) *argc + 1));
264
if(argv == NULL){
265
return NULL;
266
}
267
argv[*argc-1] = arg;
268
argv[*argc] = NULL;
269
return argv;
270
}
271
272
static void free_plugin_list(plugin *plugin_list){
273
for(plugin *next; plugin_list != NULL; plugin_list = next){
274
next = plugin_list->next;
275
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
276
free(*arg);
277
}
278
free(plugin_list->argv);
279
for(char **env = plugin_list->environ; *env != NULL; env++){
280
free(*env);
281
}
282
free(plugin_list->environ);
283
free(plugin_list);
284
}
155
process *proc = process_list;
156
int status;
157
pid_t pid = wait(&status);
158
if(pid == -1){
159
perror("wait");
160
return;
161
}
162
while(proc != NULL and proc->pid != pid){
163
proc = proc->next;
164
}
165
if(proc == NULL){
166
/* Process not found in process list */
167
return;
168
}
169
proc->status = status;
170
proc->completed = true;
285
171
}
286
172
287
173
int main(int argc, char *argv[]){
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
290
FILE *conffp;
174
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
291
175
size_t d_name_len;
292
176
DIR *dir = NULL;
293
177
struct dirent *dirst;
301
185
struct sigaction old_sigchld_action;
302
186
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
303
187
.sa_flags = SA_NOCLDSTOP };
304
char **custom_argv = NULL;
305
int custom_argc = 0;
188
char *plus_options = NULL;
189
char **plus_argv = NULL;
306
190
307
191
/* Establish a signal handler */
308
192
sigemptyset(&sigchld_action.sa_mask);
309
193
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
310
if(ret == -1){
194
if(ret < 0){
311
195
perror("sigaddset");
312
exitstatus = EXIT_FAILURE;
313
goto fallback;
196
exit(EXIT_FAILURE);
314
197
}
315
198
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
316
if(ret == -1){
199
if(ret < 0){
317
200
perror("sigaction");
318
exitstatus = EXIT_FAILURE;
319
goto fallback;
201
exit(EXIT_FAILURE);
320
202
}
321
203
322
204
/* The options we understand. */
324
206
{ .name = "global-options", .key = 'g',
325
207
.arg = "OPTION[,OPTION[,...]]",
326
208
.doc = "Options passed to all plugins" },
327
{ .name = "global-envs", .key = 'e',
328
.arg = "VAR=value",
329
.doc = "Environment variable passed to all plugins" },
330
209
{ .name = "options-for", .key = 'o',
331
210
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
332
211
.doc = "Options passed only to specified plugin" },
333
{ .name = "envs-for", .key = 'f',
334
.arg = "PLUGIN:ENV=value",
335
.doc = "Environment variable passed to specified plugin" },
336
212
{ .name = "disable", .key = 'd',
337
213
.arg = "PLUGIN",
338
214
.doc = "Disable a specific plugin", .group = 1 },
357
233
switch (key) {
358
234
case 'g':
359
235
if (arg != NULL){
360
char *p;
361
while((p = strsep(&arg, ",")) != NULL){
362
if(p[0] == '\0'){
363
continue;
364
}
365
if(not add_argument(getplugin(NULL, plugins), p)){
366
perror("add_argument");
367
return ARGP_ERR_UNKNOWN;
368
}
369
}
370
}
371
break;
372
case 'e':
373
if(arg == NULL){
374
break;
375
}
376
{
377
char *envdef = strdup(arg);
378
if(envdef == NULL){
379
break;
380
}
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
382
perror("add_environment");
383
}
236
char *p = strtok(arg, ",");
237
do{
238
addargument(getplugin(NULL, plugins), p);
239
p = strtok(NULL, ",");
240
} while (p != NULL);
384
241
}
385
242
break;
386
243
case 'o':
387
244
if (arg != NULL){
388
char *p_name = strsep(&arg, ":");
389
if(p_name[0] == '\0'){
390
break;
391
}
392
char *opt = strsep(&arg, ":");
393
if(opt[0] == '\0'){
394
break;
395
}
396
if(opt != NULL){
397
char *p;
398
while((p = strsep(&opt, ",")) != NULL){
399
if(p[0] == '\0'){
400
continue;
401
}
402
if(not add_argument(getplugin(p_name, plugins), p)){
403
perror("add_argument");
404
return ARGP_ERR_UNKNOWN;
405
}
406
}
407
}
408
}
409
break;
410
case 'f':
411
if(arg == NULL){
412
break;
413
}
414
{
415
char *envdef = strchr(arg, ':');
416
if(envdef == NULL){
417
break;
418
}
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
420
if(p_name == NULL){
421
break;
422
}
423
envdef++;
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
425
perror("add_environment");
245
char *name = strtok(arg, ":");
246
char *p = strtok(NULL, ":");
247
if(p != NULL){
248
p = strtok(p, ",");
249
do{
250
addargument(getplugin(name, plugins), p);
251
p = strtok(NULL, ",");
252
} while (p != NULL);
426
253
}
427
254
}
428
255
break;
429
256
case 'd':
430
257
if (arg != NULL){
431
plugin *p = getplugin(arg, plugins);
432
if(p == NULL){
433
return ARGP_ERR_UNKNOWN;
434
}
435
p->disabled = true;
258
getplugin(arg, plugins)->disabled = true;
436
259
}
437
260
break;
438
261
case 128:
448
271
debug = true;
449
272
break;
450
273
case ARGP_KEY_ARG:
451
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
274
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
275
argp_usage (state);
276
}
277
plus_options = arg;
452
278
break;
453
279
case ARGP_KEY_END:
454
280
break;
466
292
467
293
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
468
294
if (ret == ARGP_ERR_UNKNOWN){
469
fprintf(stderr, "Unknown error while parsing arguments\n");
295
fprintf(stderr, "Unkown error while parsing arguments\n");
470
296
exitstatus = EXIT_FAILURE;
471
goto fallback;
297
goto end;
472
298
}
473
474
conffp = fopen(argfile, "r");
475
if(conffp != NULL){
476
char *org_line = NULL;
477
char *p, *arg, *new_arg, *line;
478
size_t size = 0;
479
ssize_t sret;
480
const char whitespace_delims[] = " \r\t\f\v\n";
481
const char comment_delim[] = "#";
482
483
while(true){
484
sret = getline(&org_line, &size, conffp);
485
if(sret == -1){
486
break;
487
}
488
489
line = org_line;
490
arg = strsep(&line, comment_delim);
491
while((p = strsep(&arg, whitespace_delims)) != NULL){
492
if(p[0] == '\0'){
493
continue;
494
}
495
new_arg = strdup(p);
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
500
goto fallback;
501
}
502
}
503
}
504
free(org_line);
505
} else{
506
/* Check for harmful errors and go to fallback. Other errors might
507
not affect opening plugins */
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
509
perror("fopen");
299
300
if(plus_options){
301
/* This is a mangled argument in the form of
302
"+--option+--other-option=parameter+--yet-another-option", etc */
303
/* Make new argc and argv vars, and call argp_parse() again. */
304
plus_options++; /* skip the first '+' character */
305
const char delims[] = "+";
306
char *arg;
307
int new_argc = 1;
308
plus_argv = malloc(sizeof(char*) * 2);
309
if(plus_argv == NULL){
310
perror("malloc");
510
311
exitstatus = EXIT_FAILURE;
511
goto fallback;
512
}
513
}
514
515
if(custom_argv != NULL){
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
518
&plugin_list);
312
goto end;
313
}
314
plus_argv[0] = argv[0];
315
plus_argv[1] = NULL;
316
arg = strtok(plus_options, delims); /* Get first argument */
317
while(arg != NULL){
318
new_argc++;
319
plus_argv = realloc(plus_argv, sizeof(char *)
320
* ((unsigned int) new_argc + 1));
321
if(plus_argv == NULL){
322
perror("realloc");
323
exitstatus = EXIT_FAILURE;
324
goto end;
325
}
326
plus_argv[new_argc-1] = arg;
327
plus_argv[new_argc] = NULL;
328
arg = strtok(NULL, delims); /* Get next argument */
329
}
330
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
519
331
if (ret == ARGP_ERR_UNKNOWN){
520
fprintf(stderr, "Unknown error while parsing arguments\n");
332
fprintf(stderr, "Unkown error while parsing arguments\n");
521
333
exitstatus = EXIT_FAILURE;
522
goto fallback;
334
goto end;
523
335
}
524
336
}
525
337
530
342
for(char **a = p->argv; *a != NULL; a++){
531
343
fprintf(stderr, "\tArg: %s\n", *a);
532
344
}
533
fprintf(stderr, "...and %u environment variables\n", p->envc);
534
for(char **a = p->environ; *a != NULL; a++){
535
fprintf(stderr, "\t%s\n", *a);
536
}
537
345
}
538
346
}
539
347
551
359
if(dir == NULL){
552
360
perror("Could not open plugin dir");
553
361
exitstatus = EXIT_FAILURE;
554
goto fallback;
362
goto end;
555
363
}
556
364
557
365
/* Set the FD_CLOEXEC flag on the directory, if possible */
562
370
if(ret < 0){
563
371
perror("set_cloexec_flag");
564
372
exitstatus = EXIT_FAILURE;
565
goto fallback;
373
goto end;
566
374
}
567
375
}
568
376
}
577
385
if (errno == EBADF){
578
386
perror("readdir");
579
387
exitstatus = EXIT_FAILURE;
580
goto fallback;
388
goto end;
581
389
}
582
390
break;
583
391
}
628
436
continue;
629
437
}
630
438
}
631
632
char *filename;
633
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
634
if(ret < 0){
635
perror("asprintf");
636
continue;
439
440
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
441
if (filename == NULL){
442
perror("malloc");
443
exitstatus = EXIT_FAILURE;
444
goto end;
637
445
}
446
strcpy(filename, plugindir); /* Spurious warning */
447
strcat(filename, "/"); /* Spurious warning */
448
strcat(filename, dirst->d_name); /* Spurious warning */
638
449
639
450
ret = stat(filename, &st);
640
451
if (ret == -1){
641
452
perror("stat");
642
free(filename);
643
continue;
453
exitstatus = EXIT_FAILURE;
454
goto end;
644
455
}
645
456
646
457
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
651
462
free(filename);
652
463
continue;
653
464
}
654
plugin *p = getplugin(dirst->d_name, &plugin_list);
655
if(p == NULL){
656
perror("getplugin");
657
free(filename);
658
continue;
659
}
660
if(p->disabled){
465
if(getplugin(dirst->d_name, &plugin_list)->disabled){
661
466
if(debug){
662
467
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
663
468
dirst->d_name);
665
470
free(filename);
666
471
continue;
667
472
}
473
plugin *p = getplugin(dirst->d_name, &plugin_list);
668
474
{
669
475
/* Add global arguments to argument list for this plugin */
670
476
plugin *g = getplugin(NULL, &plugin_list);
671
if(g != NULL){
672
for(char **a = g->argv + 1; *a != NULL; a++){
673
if(not add_argument(p, *a)){
674
perror("add_argument");
675
}
676
}
677
/* Add global environment variables */
678
for(char **e = g->environ; *e != NULL; e++){
679
if(not add_environment(p, *e)){
680
perror("add_environment");
681
}
682
}
683
}
684
}
685
/* If this plugin has any environment variables, we will call
686
using execve and need to duplicate the environment from this
687
process, too. */
688
if(p->environ[0] != NULL){
689
for(char **e = environ; *e != NULL; e++){
690
char *copy = strdup(*e);
691
if(copy == NULL){
692
perror("strdup");
693
continue;
694
}
695
if(not add_environment(p, copy)){
696
perror("add_environment");
697
}
698
}
699
}
700
701
int pipefd[2];
477
for(char **a = g->argv + 1; *a != NULL; a++){
478
addargument(p, *a);
479
}
480
}
481
int pipefd[2];
702
482
ret = pipe(pipefd);
703
483
if (ret == -1){
704
484
perror("pipe");
705
485
exitstatus = EXIT_FAILURE;
706
goto fallback;
486
goto end;
707
487
}
708
488
ret = set_cloexec_flag(pipefd[0]);
709
489
if(ret < 0){
710
490
perror("set_cloexec_flag");
711
491
exitstatus = EXIT_FAILURE;
712
goto fallback;
492
goto end;
713
493
}
714
494
ret = set_cloexec_flag(pipefd[1]);
715
495
if(ret < 0){
716
496
perror("set_cloexec_flag");
717
497
exitstatus = EXIT_FAILURE;
718
goto fallback;
498
goto end;
719
499
}
720
500
/* Block SIGCHLD until process is safely in process list */
721
501
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
722
502
if(ret < 0){
723
503
perror("sigprocmask");
724
504
exitstatus = EXIT_FAILURE;
725
goto fallback;
505
goto end;
726
506
}
727
507
// Starting a new process to be watched
728
508
pid_t pid = fork();
729
if(pid == -1){
730
perror("fork");
731
exitstatus = EXIT_FAILURE;
732
goto fallback;
733
}
734
509
if(pid == 0){
735
510
/* this is the child process */
736
511
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
755
530
above and must now close it manually here. */
756
531
closedir(dir);
757
532
}
758
if(p->environ[0] == NULL){
759
if(execv(filename, p->argv) < 0){
760
perror("execv");
761
_exit(EXIT_FAILURE);
762
}
763
} else {
764
if(execve(filename, p->argv, p->environ) < 0){
765
perror("execve");
766
_exit(EXIT_FAILURE);
767
}
533
if(execv(filename, p->argv) < 0){
534
perror("execv");
535
_exit(EXIT_FAILURE);
768
536
}
769
537
/* no return */
770
538
}
779
547
perror("sigprocmask");
780
548
}
781
549
exitstatus = EXIT_FAILURE;
782
goto fallback;
550
goto end;
783
551
}
784
552
785
553
*new_process = (struct process){ .pid = pid,
793
561
if(ret < 0){
794
562
perror("sigprocmask");
795
563
exitstatus = EXIT_FAILURE;
796
goto fallback;
564
goto end;
797
565
}
798
566
799
567
FD_SET(new_process->fd, &rfds_all);
804
572
805
573
}
806
574
807
free_plugin_list(plugin_list);
808
plugin_list = NULL;
575
/* Free the plugin list */
576
for(plugin *next; plugin_list != NULL; plugin_list = next){
577
next = plugin_list->next;
578
free(plugin_list->argv);
579
free(plugin_list);
580
}
809
581
810
582
closedir(dir);
811
583
dir = NULL;
812
584
813
585
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
815
" directory?\n");
816
process_list = NULL;
586
fprintf(stderr, "No plugin processes started, exiting\n");
587
exitstatus = EXIT_FAILURE;
588
goto end;
817
589
}
818
590
while(process_list){
819
591
fd_set rfds = rfds_all;
821
593
if (select_ret == -1){
822
594
perror("select");
823
595
exitstatus = EXIT_FAILURE;
824
goto fallback;
596
goto end;
825
597
}
826
598
/* OK, now either a process completed, or something can be read
827
599
from one of them */
834
606
/* Bad exit by plugin */
835
607
if(debug){
836
608
if(WIFEXITED(proc->status)){
837
fprintf(stderr, "Plugin %u exited with status %d\n",
838
(unsigned int) (proc->pid),
839
WEXITSTATUS(proc->status));
609
fprintf(stderr, "Plugin %d exited with status %d\n",
610
proc->pid, WEXITSTATUS(proc->status));
840
611
} else if(WIFSIGNALED(proc->status)) {
841
fprintf(stderr, "Plugin %u killed by signal %d\n",
842
(unsigned int) (proc->pid),
843
WTERMSIG(proc->status));
612
fprintf(stderr, "Plugin %d killed by signal %d\n",
613
proc->pid, WTERMSIG(proc->status));
844
614
} else if(WCOREDUMP(proc->status)){
845
fprintf(stderr, "Plugin %d dumped core\n",
846
(unsigned int) (proc->pid));
615
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
847
616
}
848
617
}
849
618
/* Remove the plugin */
850
619
FD_CLR(proc->fd, &rfds_all);
851
620
/* Block signal while modifying process_list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
621
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
853
622
if(ret < 0){
854
623
perror("sigprocmask");
855
624
exitstatus = EXIT_FAILURE;
856
goto fallback;
625
goto end;
857
626
}
858
627
/* Delete this process entry from the list */
859
628
if(process_list == proc){
882
651
break;
883
652
}
884
653
/* This process exited nicely, so print its buffer */
885
886
bool bret = print_out_password(proc->buffer,
887
proc->buffer_length);
888
if(not bret){
889
perror("print_out_password");
890
exitstatus = EXIT_FAILURE;
654
for(size_t written = 0; written < proc->buffer_length;
655
written += (size_t)ret){
656
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
657
proc->buffer + written,
658
proc->buffer_length
659
- written));
660
if(ret < 0){
661
perror("write");
662
exitstatus = EXIT_FAILURE;
663
goto end;
664
}
891
665
}
892
goto fallback;
666
goto end;
893
667
}
894
668
/* This process has not completed. Does it have any output? */
895
669
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
903
677
if (proc->buffer == NULL){
904
678
perror("malloc");
905
679
exitstatus = EXIT_FAILURE;
906
goto fallback;
680
goto end;
907
681
}
908
682
proc->buffer_size += BUFFER_SIZE;
909
683
}
922
696
}
923
697
}
924
698
}
925
926
927
fallback:
928
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
930
/* Fallback if all plugins failed, none are found or an error
931
occured */
932
bool bret;
933
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
934
char *passwordbuffer = getpass("Password: ");
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
936
if(not bret){
937
perror("print_out_password");
938
exitstatus = EXIT_FAILURE;
939
}
699
if(process_list == NULL){
700
fprintf(stderr, "All plugin processes failed, exiting\n");
701
exitstatus = EXIT_FAILURE;
940
702
}
941
703
704
end:
942
705
/* Restore old signal handler */
943
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
944
if(ret == -1){
945
perror("sigaction");
946
exitstatus = EXIT_FAILURE;
947
}
948
949
if(custom_argv != NULL){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
951
free(*arg);
952
}
953
free(custom_argv);
954
}
955
free_plugin_list(plugin_list);
706
sigaction(SIGCHLD, &old_sigchld_action, NULL);
707
708
free(plus_argv);
709
710
/* Free the plugin list */
711
for(plugin *next; plugin_list != NULL; plugin_list = next){
712
next = plugin_list->next;
713
free(plugin_list->argv);
714
free(plugin_list);
715
}
956
716
957
717
if(dir != NULL){
958
718
closedir(dir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0