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- Committer: Teddy Hogeborn
- Date: 2008-08-02 21:06:12 UTC
- Revision ID: teddy@fukt.bsnet.se-20080802210612-4c1waup4z0f66ya7
Non-tested commit for merge purposes.
* plugbasedclient.c (getplugin, addargument, set_cloexec): Made static.
* plugins.d/passprompt.c (termination_handler): Made static.
* plugbasedclient.c (getplugin, addargument, set_cloexec): Made static.
* plugins.d/passprompt.c (termination_handler): Made static.
- files added:
- ca.pem
- files removed:
- COPYING
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/password-request.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugbasedclient.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() */
26
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
29
#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
33
stat, waitpid(), WIFEXITED(),
34
WEXITSTATUS(), wait(), pid_t,
35
uid_t, gid_t, getuid(), getgid(),
36
dirfd() */
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
FD_SET(), FD_ISSET(), FD_CLR */
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
27
stderr, STDOUT_FILENO */
42
28
#include <iso646.h> /* and, or, not */
29
#include <sys/types.h> /* DIR, opendir(), stat(),
30
struct stat, waitpid(),
31
WIFEXITED(), WEXITSTATUS(),
32
wait() */
33
#include <sys/wait.h> /* wait() */
43
34
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
35
readdir(), closedir() */
36
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
45
37
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
fcntl(), setuid(), setgid(),
47
F_GETFD, F_SETFD, FD_CLOEXEC,
48
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
51
close() */
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
38
fcntl() */
39
#include <fcntl.h> /* fcntl() */
40
#include <stddef.h> /* NULL */
41
#include <stdlib.h> /* EXIT_FAILURE */
42
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
43
FD_SET(), FD_ISSET() */
44
#include <string.h> /* strlen(), strcpy(), strcat() */
45
#include <stdbool.h> /* true */
46
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
47
WEXITSTATUS() */
55
48
#include <errno.h> /* errno */
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
60
#include <signal.h> /* struct sigaction, sigemptyset(),
61
sigaddset(), sigaction(),
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
64
#include <errno.h> /* errno, EBADF */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
51
argp_parse() */
65
52
66
53
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
69
const char *argp_program_version = "plugin-runner 1.0";
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
54
72
55
struct process;
73
56
87
70
char *name; /* can be NULL or any plugin name */
88
71
char **argv;
89
72
int argc;
90
char **environ;
91
int envc;
92
73
bool disabled;
93
74
struct plugin *next;
94
75
} plugin;
103
84
/* Create a new plugin */
104
85
plugin *new_plugin = malloc(sizeof(plugin));
105
86
if (new_plugin == NULL){
106
return NULL;
107
}
108
char *copy_name = strdup(name);
109
if(copy_name == NULL){
110
return NULL;
111
}
112
113
*new_plugin = (plugin) { .name = copy_name,
114
.argc = 1,
115
.envc = 0,
116
.disabled = false,
117
.next = *plugin_list };
118
87
perror("malloc");
88
exit(EXIT_FAILURE);
89
}
90
new_plugin->name = name;
119
91
new_plugin->argv = malloc(sizeof(char *) * 2);
120
92
if (new_plugin->argv == NULL){
121
free(new_plugin);
122
return NULL;
93
perror("malloc");
94
exit(EXIT_FAILURE);
123
95
}
124
new_plugin->argv[0] = copy_name;
96
new_plugin->argv[0] = name;
125
97
new_plugin->argv[1] = NULL;
126
127
new_plugin->environ = malloc(sizeof(char *));
128
if(new_plugin->environ == NULL){
129
free(new_plugin->argv);
130
free(new_plugin);
131
return NULL;
132
}
133
new_plugin->environ[0] = NULL;
98
new_plugin->argc = 1;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
134
101
/* Append the new plugin to the list */
135
102
*plugin_list = new_plugin;
136
103
return new_plugin;
137
104
}
138
105
139
/* Helper function for add_argument and add_environment */
140
static bool add_to_char_array(const char *new, char ***array,
141
int *len){
142
/* Resize the pointed-to array to hold one more pointer */
143
*array = realloc(*array, sizeof(char *)
144
* (size_t) ((*len) + 2));
145
/* Malloc check */
146
if(*array == NULL){
147
return false;
148
}
149
/* Make a copy of the new string */
150
char *copy = strdup(new);
151
if(copy == NULL){
152
return false;
153
}
154
/* Insert the copy */
155
(*array)[*len] = copy;
156
(*len)++;
157
/* Add a new terminating NULL pointer to the last element */
158
(*array)[*len] = NULL;
159
return true;
160
}
161
162
/* Add to a plugin's argument vector */
163
static bool add_argument(plugin *p, const char *arg){
164
if(p == NULL){
165
return false;
166
}
167
return add_to_char_array(arg, &(p->argv), &(p->argc));
168
}
169
170
/* Add to a plugin's environment */
171
static bool add_environment(plugin *p, const char *def){
172
if(p == NULL){
173
return false;
174
}
175
return add_to_char_array(def, &(p->environ), &(p->envc));
176
}
177
106
static void addargument(plugin *p, char *arg){
107
p->argv[p->argc] = arg;
108
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
109
if (p->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
112
}
113
p->argc++;
114
p->argv[p->argc] = NULL;
115
}
178
116
179
117
/*
180
118
* Based on the example in the GNU LibC manual chapter 13.13 "File
192
130
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
193
131
}
194
132
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
195
136
process *process_list = NULL;
196
137
197
138
/* Mark a process as completed when it exits, and save its exit
200
141
process *proc = process_list;
201
142
int status;
202
143
pid_t pid = wait(&status);
203
if(pid == -1){
204
perror("wait");
205
return;
206
}
207
144
while(proc != NULL and proc->pid != pid){
208
proc = proc->next;
145
proc = proc->next;
209
146
}
210
147
if(proc == NULL){
211
148
/* Process not found in process list */
215
152
proc->completed = true;
216
153
}
217
154
218
bool print_out_password(const char *buffer, size_t length){
219
ssize_t ret;
220
if(length>0 and buffer[length-1] == '\n'){
221
length--;
222
}
223
for(size_t written = 0; written < length; written += (size_t)ret){
224
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
225
length - written));
226
if(ret < 0){
227
return false;
228
}
229
}
230
return true;
231
}
232
233
char **add_to_argv(char **argv, int *argc, char *arg){
234
if (argv == NULL){
235
*argc = 1;
236
argv = malloc(sizeof(char*) * 2);
237
if(argv == NULL){
238
return NULL;
239
}
240
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
241
argv[1] = NULL;
242
}
243
*argc += 1;
244
argv = realloc(argv, sizeof(char *)
245
* ((unsigned int) *argc + 1));
246
if(argv == NULL){
247
return NULL;
248
}
249
argv[*argc-1] = arg;
250
argv[*argc] = NULL;
251
return argv;
252
}
253
254
static void free_plugin_list(plugin *plugin_list){
255
for(plugin *next = plugin_list; plugin_list != NULL; plugin_list = next){
256
next = plugin_list->next;
257
free(plugin_list->name);
258
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
259
free(*arg);
260
}
261
free(plugin_list->argv);
262
for(char **env = plugin_list->environ; *env != NULL; env++){
263
free(*env);
264
}
265
free(plugin_list->environ);
266
free(plugin_list);
267
}
268
}
269
270
155
int main(int argc, char *argv[]){
271
const char *plugindir = "/lib/mandos/plugins.d";
272
const char *argfile = ARGFILE;
273
FILE *conffp;
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
274
157
size_t d_name_len;
275
158
DIR *dir = NULL;
276
159
struct dirent *dirst;
277
160
struct stat st;
278
161
fd_set rfds_all;
279
162
int ret, maxfd = 0;
280
uid_t uid = 65534;
281
gid_t gid = 65534;
282
163
bool debug = false;
283
164
int exitstatus = EXIT_SUCCESS;
284
struct sigaction old_sigchld_action;
285
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
286
.sa_flags = SA_NOCLDSTOP };
287
char **custom_argv = NULL;
288
int custom_argc = 0;
289
165
290
166
/* Establish a signal handler */
167
struct sigaction old_sigchld_action,
168
sigchld_action = { .sa_handler = handle_sigchld,
169
.sa_flags = SA_NOCLDSTOP };
291
170
sigemptyset(&sigchld_action.sa_mask);
292
171
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
293
if(ret == -1){
172
if(ret < 0){
294
173
perror("sigaddset");
295
exitstatus = EXIT_FAILURE;
296
goto fallback;
174
exit(EXIT_FAILURE);
297
175
}
298
176
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
299
if(ret == -1){
177
if(ret < 0){
300
178
perror("sigaction");
301
exitstatus = EXIT_FAILURE;
302
goto fallback;
179
exit(EXIT_FAILURE);
303
180
}
304
181
305
182
/* The options we understand. */
307
184
{ .name = "global-options", .key = 'g',
308
185
.arg = "OPTION[,OPTION[,...]]",
309
186
.doc = "Options passed to all plugins" },
310
{ .name = "global-envs", .key = 'e',
311
.arg = "VAR=value",
312
.doc = "Environment variable passed to all plugins" },
313
187
{ .name = "options-for", .key = 'o',
314
188
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
315
189
.doc = "Options passed only to specified plugin" },
316
{ .name = "envs-for", .key = 'f',
317
.arg = "PLUGIN:ENV=value",
318
.doc = "Environment variable passed to specified plugin" },
319
190
{ .name = "disable", .key = 'd',
320
191
.arg = "PLUGIN",
321
192
.doc = "Disable a specific plugin", .group = 1 },
322
193
{ .name = "plugin-dir", .key = 128,
323
194
.arg = "DIRECTORY",
324
195
.doc = "Specify a different plugin directory", .group = 2 },
325
{ .name = "userid", .key = 129,
326
.arg = "ID", .flags = 0,
327
.doc = "User ID the plugins will run as", .group = 2 },
328
{ .name = "groupid", .key = 130,
329
.arg = "ID", .flags = 0,
330
.doc = "Group ID the plugins will run as", .group = 2 },
331
{ .name = "debug", .key = 131,
196
{ .name = "debug", .key = 129,
332
197
.doc = "Debug mode", .group = 3 },
333
198
{ .name = NULL }
334
199
};
340
205
switch (key) {
341
206
case 'g':
342
207
if (arg != NULL){
343
char *p;
344
while((p = strsep(&arg, ",")) != NULL){
345
if(p[0] == '\0'){
346
continue;
347
}
348
if(not add_argument(getplugin(NULL, plugins), p)){
349
perror("add_argument");
350
return ARGP_ERR_UNKNOWN;
351
}
352
}
353
}
354
break;
355
case 'e':
356
if(arg == NULL){
357
break;
358
}
359
{
360
char *envdef = strdup(arg);
361
if(envdef == NULL){
362
break;
363
}
364
if(not add_environment(getplugin(NULL, plugins), envdef)){
365
perror("add_environment");
366
}
208
char *p = strtok(arg, ",");
209
do{
210
addargument(getplugin(NULL, plugins), p);
211
p = strtok(NULL, ",");
212
} while (p);
367
213
}
368
214
break;
369
215
case 'o':
370
216
if (arg != NULL){
371
char *p_name = strsep(&arg, ":");
372
if(p_name[0] == '\0'){
373
break;
374
}
375
char *opt = strsep(&arg, ":");
376
if(opt[0] == '\0'){
377
break;
378
}
379
if(opt != NULL){
380
char *p;
381
while((p = strsep(&opt, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(p_name, plugins), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
388
}
389
}
390
}
391
}
392
break;
393
case 'f':
394
if(arg == NULL){
395
break;
396
}
397
{
398
char *envdef = strchr(arg, ':');
399
if(envdef == NULL){
400
break;
401
}
402
char *p_name = strndup(arg, (size_t) (envdef-arg));
403
if(p_name == NULL){
404
break;
405
}
406
envdef++;
407
if(not add_environment(getplugin(p_name, plugins), envdef)){
408
perror("add_environment");
217
char *name = strtok(arg, ":");
218
char *p = strtok(NULL, ":");
219
if(p){
220
p = strtok(p, ",");
221
do{
222
addargument(getplugin(name, plugins), p);
223
p = strtok(NULL, ",");
224
} while (p);
409
225
}
410
226
}
411
227
break;
412
228
case 'd':
413
229
if (arg != NULL){
414
plugin *p = getplugin(arg, plugins);
415
if(p == NULL){
416
return ARGP_ERR_UNKNOWN;
417
}
418
p->disabled = true;
230
getplugin(arg, plugins)->disabled = true;
419
231
}
420
232
break;
421
233
case 128:
422
234
plugindir = arg;
423
235
break;
424
236
case 129:
425
uid = (uid_t)strtol(arg, NULL, 10);
426
break;
427
case 130:
428
gid = (gid_t)strtol(arg, NULL, 10);
429
break;
430
case 131:
431
237
debug = true;
432
238
break;
433
239
case ARGP_KEY_ARG:
434
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
240
argp_usage (state);
435
241
break;
436
242
case ARGP_KEY_END:
437
243
break;
444
250
plugin *plugin_list = NULL;
445
251
446
252
struct argp argp = { .options = options, .parser = parse_opt,
447
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
253
.args_doc = "",
448
254
.doc = "Mandos plugin runner -- Run plugins" };
449
255
450
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
451
if (ret == ARGP_ERR_UNKNOWN){
452
fprintf(stderr, "Unknown error while parsing arguments\n");
453
exitstatus = EXIT_FAILURE;
454
goto fallback;
455
}
456
457
conffp = fopen(argfile, "r");
458
if(conffp != NULL){
459
char *org_line = NULL;
460
char *p, *arg, *new_arg, *line;
461
size_t size = 0;
462
ssize_t sret;
463
const char whitespace_delims[] = " \r\t\f\v\n";
464
const char comment_delim[] = "#";
465
466
while(true){
467
sret = getline(&org_line, &size, conffp);
468
if(sret == -1){
469
break;
470
}
471
472
line = org_line;
473
arg = strsep(&line, comment_delim);
474
while((p = strsep(&arg, whitespace_delims)) != NULL){
475
if(p[0] == '\0'){
476
continue;
477
}
478
new_arg = strdup(p);
479
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
480
if (custom_argv == NULL){
481
perror("add_to_argv");
482
exitstatus = EXIT_FAILURE;
483
goto fallback;
484
}
485
}
486
}
487
free(org_line);
488
} else{
489
/* Check for harmful errors and go to fallback. Other errors might
490
not affect opening plugins */
491
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
492
perror("fopen");
493
exitstatus = EXIT_FAILURE;
494
goto fallback;
495
}
496
}
497
498
if(custom_argv != NULL){
499
custom_argv[0] = argv[0];
500
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
501
if (ret == ARGP_ERR_UNKNOWN){
502
fprintf(stderr, "Unknown error while parsing arguments\n");
503
exitstatus = EXIT_FAILURE;
504
goto fallback;
505
}
506
}
256
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
507
257
508
258
if(debug){
509
259
for(plugin *p = plugin_list; p != NULL; p=p->next){
512
262
for(char **a = p->argv; *a != NULL; a++){
513
263
fprintf(stderr, "\tArg: %s\n", *a);
514
264
}
515
fprintf(stderr, "...and %u environment variables\n", p->envc);
516
for(char **a = p->environ; *a != NULL; a++){
517
fprintf(stderr, "\t%s\n", *a);
518
}
519
265
}
520
266
}
521
267
522
ret = setuid(uid);
523
if (ret == -1){
524
perror("setuid");
525
}
526
527
setgid(gid);
528
if (ret == -1){
529
perror("setgid");
530
}
531
532
268
dir = opendir(plugindir);
533
269
if(dir == NULL){
534
270
perror("Could not open plugin dir");
535
271
exitstatus = EXIT_FAILURE;
536
goto fallback;
272
goto end;
537
273
}
538
274
539
275
/* Set the FD_CLOEXEC flag on the directory, if possible */
544
280
if(ret < 0){
545
281
perror("set_cloexec_flag");
546
282
exitstatus = EXIT_FAILURE;
547
goto fallback;
283
goto end;
548
284
}
549
285
}
550
286
}
556
292
557
293
// All directory entries have been processed
558
294
if(dirst == NULL){
559
if (errno == EBADF){
560
perror("readdir");
561
exitstatus = EXIT_FAILURE;
562
goto fallback;
563
}
564
295
break;
565
296
}
566
297
610
341
continue;
611
342
}
612
343
}
613
614
char *filename;
615
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
616
if(ret < 0){
617
perror("asprintf");
618
continue;
619
}
620
621
ret = stat(filename, &st);
622
if (ret == -1){
623
perror("stat");
624
free(filename);
625
continue;
626
}
344
345
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
346
if (filename == NULL){
347
perror("malloc");
348
exitstatus = EXIT_FAILURE;
349
goto end;
350
}
351
strcpy(filename, plugindir); /* Spurious warning */
352
strcat(filename, "/"); /* Spurious warning */
353
strcat(filename, dirst->d_name); /* Spurious warning */
354
355
stat(filename, &st);
627
356
628
357
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
629
358
if(debug){
633
362
free(filename);
634
363
continue;
635
364
}
636
plugin *p = getplugin(dirst->d_name, &plugin_list);
637
if(p == NULL){
638
perror("getplugin");
639
free(filename);
640
continue;
641
}
642
if(p->disabled){
365
if(getplugin(dirst->d_name, &plugin_list)->disabled){
643
366
if(debug){
644
367
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
645
368
dirst->d_name);
647
370
free(filename);
648
371
continue;
649
372
}
373
plugin *p = getplugin(dirst->d_name, &plugin_list);
650
374
{
651
375
/* Add global arguments to argument list for this plugin */
652
376
plugin *g = getplugin(NULL, &plugin_list);
653
if(g != NULL){
654
for(char **a = g->argv + 1; *a != NULL; a++){
655
if(not add_argument(p, *a)){
656
perror("add_argument");
657
}
658
}
659
/* Add global environment variables */
660
for(char **e = g->environ; *e != NULL; e++){
661
if(not add_environment(p, *e)){
662
perror("add_environment");
663
}
664
}
665
}
666
}
667
/* If this plugin has any environment variables, we will call
668
using execve and need to duplicate the environment from this
669
process, too. */
670
if(p->environ[0] != NULL){
671
for(char **e = environ; *e != NULL; e++){
672
char *copy = strdup(*e);
673
if(copy == NULL){
674
perror("strdup");
675
continue;
676
}
677
if(not add_environment(p, copy)){
678
perror("add_environment");
679
}
680
}
681
}
682
377
for(char **a = g->argv + 1; *a != NULL; a++){
378
addargument(p, *a);
379
}
380
}
683
381
int pipefd[2];
684
382
ret = pipe(pipefd);
685
383
if (ret == -1){
686
384
perror("pipe");
687
385
exitstatus = EXIT_FAILURE;
688
goto fallback;
386
goto end;
689
387
}
690
388
ret = set_cloexec_flag(pipefd[0]);
691
389
if(ret < 0){
692
390
perror("set_cloexec_flag");
693
391
exitstatus = EXIT_FAILURE;
694
goto fallback;
392
goto end;
695
393
}
696
394
ret = set_cloexec_flag(pipefd[1]);
697
395
if(ret < 0){
698
396
perror("set_cloexec_flag");
699
397
exitstatus = EXIT_FAILURE;
700
goto fallback;
398
goto end;
701
399
}
702
400
/* Block SIGCHLD until process is safely in process list */
703
401
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
704
402
if(ret < 0){
705
403
perror("sigprocmask");
706
404
exitstatus = EXIT_FAILURE;
707
goto fallback;
405
goto end;
708
406
}
709
407
// Starting a new process to be watched
710
408
pid_t pid = fork();
711
if(pid == -1){
712
perror("fork");
713
exitstatus = EXIT_FAILURE;
714
goto fallback;
715
}
716
409
if(pid == 0){
717
410
/* this is the child process */
718
411
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
725
418
perror("sigprocmask");
726
419
_exit(EXIT_FAILURE);
727
420
}
728
729
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
730
if(ret == -1){
731
perror("dup2");
732
_exit(EXIT_FAILURE);
733
}
421
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
734
422
735
423
if(dirfd(dir) < 0){
736
424
/* If dir has no file descriptor, we could not set FD_CLOEXEC
737
425
above and must now close it manually here. */
738
426
closedir(dir);
739
427
}
740
if(p->environ[0] == NULL){
741
if(execv(filename, p->argv) < 0){
742
perror("execv");
743
_exit(EXIT_FAILURE);
744
}
745
} else {
746
if(execve(filename, p->argv, p->environ) < 0){
747
perror("execve");
748
_exit(EXIT_FAILURE);
749
}
428
if(execv(filename, p->argv) < 0){
429
perror("execv");
430
_exit(EXIT_FAILURE);
750
431
}
751
432
/* no return */
752
433
}
761
442
perror("sigprocmask");
762
443
}
763
444
exitstatus = EXIT_FAILURE;
764
goto fallback;
445
goto end;
765
446
}
766
447
767
448
*new_process = (struct process){ .pid = pid,
775
456
if(ret < 0){
776
457
perror("sigprocmask");
777
458
exitstatus = EXIT_FAILURE;
778
goto fallback;
459
goto end;
779
460
}
780
461
781
462
FD_SET(new_process->fd, &rfds_all);
786
467
787
468
}
788
469
789
free_plugin_list(plugin_list);
470
/* Free the plugin list */
471
for(plugin *next; plugin_list != NULL; plugin_list = next){
472
next = plugin_list->next;
473
free(plugin_list->argv);
474
free(plugin_list);
475
}
790
476
791
477
closedir(dir);
792
478
dir = NULL;
793
479
794
480
if (process_list == NULL){
795
fprintf(stderr, "No plugin processes started. Incorrect plugin"
796
" directory?\n");
797
process_list = NULL;
481
fprintf(stderr, "No plugin processes started, exiting\n");
482
exitstatus = EXIT_FAILURE;
483
goto end;
798
484
}
799
485
while(process_list){
800
486
fd_set rfds = rfds_all;
802
488
if (select_ret == -1){
803
489
perror("select");
804
490
exitstatus = EXIT_FAILURE;
805
goto fallback;
491
goto end;
806
492
}
807
493
/* OK, now either a process completed, or something can be read
808
494
from one of them */
815
501
/* Bad exit by plugin */
816
502
if(debug){
817
503
if(WIFEXITED(proc->status)){
818
fprintf(stderr, "Plugin %u exited with status %d\n",
819
(unsigned int) (proc->pid),
820
WEXITSTATUS(proc->status));
504
fprintf(stderr, "Plugin %d exited with status %d\n",
505
proc->pid, WEXITSTATUS(proc->status));
821
506
} else if(WIFSIGNALED(proc->status)) {
822
fprintf(stderr, "Plugin %u killed by signal %d\n",
823
(unsigned int) (proc->pid),
824
WTERMSIG(proc->status));
507
fprintf(stderr, "Plugin %d killed by signal %d\n",
508
proc->pid, WTERMSIG(proc->status));
825
509
} else if(WCOREDUMP(proc->status)){
826
fprintf(stderr, "Plugin %d dumped core\n",
827
(unsigned int) (proc->pid));
510
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
828
511
}
829
512
}
830
513
/* Remove the plugin */
834
517
if(ret < 0){
835
518
perror("sigprocmask");
836
519
exitstatus = EXIT_FAILURE;
837
goto fallback;
520
goto end;
838
521
}
839
522
/* Delete this process entry from the list */
840
523
if(process_list == proc){
863
546
break;
864
547
}
865
548
/* This process exited nicely, so print its buffer */
866
867
bool bret = print_out_password(proc->buffer, proc->buffer_length);
868
if(not bret){
869
perror("print_out_password");
870
exitstatus = EXIT_FAILURE;
549
for(size_t written = 0; written < proc->buffer_length;
550
written += (size_t)ret){
551
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
552
proc->buffer + written,
553
proc->buffer_length
554
- written));
555
if(ret < 0){
556
perror("write");
557
exitstatus = EXIT_FAILURE;
558
goto end;
559
}
871
560
}
872
goto fallback;
561
goto end;
873
562
}
874
563
/* This process has not completed. Does it have any output? */
875
564
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
883
572
if (proc->buffer == NULL){
884
573
perror("malloc");
885
574
exitstatus = EXIT_FAILURE;
886
goto fallback;
575
goto end;
887
576
}
888
577
proc->buffer_size += BUFFER_SIZE;
889
578
}
902
591
}
903
592
}
904
593
}
905
906
907
fallback:
908
909
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
910
/* Fallback if all plugins failed, none are found or an error occured */
911
bool bret;
912
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
913
char *passwordbuffer = getpass("Password: ");
914
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
915
if(not bret){
916
perror("print_out_password");
917
exitstatus = EXIT_FAILURE;
918
}
594
if(process_list == NULL){
595
fprintf(stderr, "All plugin processes failed, exiting\n");
596
exitstatus = EXIT_FAILURE;
919
597
}
920
598
599
end:
921
600
/* Restore old signal handler */
922
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
923
if(ret == -1){
924
perror("sigaction");
925
exitstatus = EXIT_FAILURE;
926
}
927
928
if(custom_argv != NULL){
929
for(char **arg = custom_argv; *arg != NULL; arg++){
930
free(*arg);
931
}
932
free(custom_argv);
933
}
934
free_plugin_list(plugin_list);
601
sigaction(SIGCHLD, &old_sigchld_action, NULL);
602
603
/* Free the plugin list */
604
for(plugin *next; plugin_list != NULL; plugin_list = next){
605
next = plugin_list->next;
606
free(plugin_list->argv);
607
free(plugin_list);
608
}
935
609
936
610
if(dir != NULL){
937
611
closedir(dir);
941
615
for(process *next; process_list != NULL; process_list = next){
942
616
next = process_list->next;
943
617
close(process_list->fd);
944
ret = kill(process_list->pid, SIGTERM);
945
if(ret == -1 and errno != ESRCH){
946
/* set-uid proccesses migth not get closed */
947
perror("kill");
948
}
618
kill(process_list->pid, SIGTERM);
949
619
free(process_list->buffer);
950
620
free(process_list);
951
621
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0