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- Committer: Björn Påhlsson
- Date: 2008-08-08 01:31:58 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 50.
- Revision ID: belorn@braxen-20080808013158-weqgqkxni7du1ke5
Added manual pages for:
clients.conf
mandos.conf
mandos
mandos-client
password-prompt
password-request
clients.conf
mandos.conf
mandos
mandos-client
password-prompt
password-request
- files added:
- network-protocol.txt
- files removed:
- COPYING
- files renamed:
- mandos-clients.conf.xml => clients.conf.xml
- 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() */
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 = NULL;
109
if(name != NULL){
110
copy_name = strdup(name);
111
if(copy_name == NULL){
112
return NULL;
113
}
114
}
115
116
*new_plugin = (plugin) { .name = copy_name,
117
.argc = 1,
118
.envc = 0,
119
.disabled = false,
120
.next = *plugin_list };
121
87
perror("malloc");
88
exit(EXIT_FAILURE);
89
}
90
new_plugin->name = name;
122
91
new_plugin->argv = malloc(sizeof(char *) * 2);
123
92
if (new_plugin->argv == NULL){
124
free(copy_name);
125
free(new_plugin);
126
return NULL;
93
perror("malloc");
94
exit(EXIT_FAILURE);
127
95
}
128
new_plugin->argv[0] = copy_name;
96
new_plugin->argv[0] = name;
129
97
new_plugin->argv[1] = NULL;
130
131
new_plugin->environ = malloc(sizeof(char *));
132
if(new_plugin->environ == NULL){
133
free(copy_name);
134
free(new_plugin->argv);
135
free(new_plugin);
136
return NULL;
137
}
138
new_plugin->environ[0] = NULL;
98
new_plugin->argc = 1;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
139
101
/* Append the new plugin to the list */
140
102
*plugin_list = new_plugin;
141
103
return new_plugin;
142
104
}
143
105
144
/* Helper function for add_argument and add_environment */
145
static bool add_to_char_array(const char *new, char ***array,
146
int *len){
147
/* Resize the pointed-to array to hold one more pointer */
148
*array = realloc(*array, sizeof(char *)
149
* (size_t) ((*len) + 2));
150
/* Malloc check */
151
if(*array == NULL){
152
return false;
153
}
154
/* Make a copy of the new string */
155
char *copy = strdup(new);
156
if(copy == NULL){
157
return false;
158
}
159
/* Insert the copy */
160
(*array)[*len] = copy;
161
(*len)++;
162
/* Add a new terminating NULL pointer to the last element */
163
(*array)[*len] = NULL;
164
return true;
165
}
166
167
/* Add to a plugin's argument vector */
168
static bool add_argument(plugin *p, const char *arg){
169
if(p == NULL){
170
return false;
171
}
172
return add_to_char_array(arg, &(p->argv), &(p->argc));
173
}
174
175
/* Add to a plugin's environment */
176
static bool add_environment(plugin *p, const char *def){
177
if(p == NULL){
178
return false;
179
}
180
return add_to_char_array(def, &(p->environ), &(p->envc));
181
}
182
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
}
183
116
184
117
/*
185
118
* Based on the example in the GNU LibC manual chapter 13.13 "File
197
130
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
198
131
}
199
132
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
200
136
process *process_list = NULL;
201
137
202
138
/* Mark a process as completed when it exits, and save its exit
205
141
process *proc = process_list;
206
142
int status;
207
143
pid_t pid = wait(&status);
208
if(pid == -1){
209
perror("wait");
210
return;
211
}
212
144
while(proc != NULL and proc->pid != pid){
213
145
proc = proc->next;
214
146
}
220
152
proc->completed = true;
221
153
}
222
154
223
bool print_out_password(const char *buffer, size_t length){
224
ssize_t ret;
225
if(length>0 and buffer[length-1] == '\n'){
226
length--;
227
}
228
for(size_t written = 0; written < length; written += (size_t)ret){
229
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
230
length - written));
231
if(ret < 0){
232
return false;
233
}
234
}
235
return true;
236
}
237
238
char **add_to_argv(char **argv, int *argc, char *arg){
239
if (argv == NULL){
240
*argc = 1;
241
argv = malloc(sizeof(char*) * 2);
242
if(argv == NULL){
243
return NULL;
244
}
245
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
246
argv[1] = NULL;
247
}
248
*argc += 1;
249
argv = realloc(argv, sizeof(char *)
250
* ((unsigned int) *argc + 1));
251
if(argv == NULL){
252
return NULL;
253
}
254
argv[*argc-1] = arg;
255
argv[*argc] = NULL;
256
return argv;
257
}
258
259
static void free_plugin_list(plugin *plugin_list){
260
for(plugin *next; plugin_list != NULL; plugin_list = next){
261
next = plugin_list->next;
262
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
263
free(*arg);
264
}
265
free(plugin_list->argv);
266
for(char **env = plugin_list->environ; *env != NULL; env++){
267
free(*env);
268
}
269
free(plugin_list->environ);
270
free(plugin_list);
271
}
272
}
273
274
155
int main(int argc, char *argv[]){
275
const char *plugindir = "/lib/mandos/plugins.d";
276
const char *argfile = ARGFILE;
277
FILE *conffp;
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
278
157
size_t d_name_len;
279
158
DIR *dir = NULL;
280
159
struct dirent *dirst;
288
167
struct sigaction old_sigchld_action;
289
168
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
290
169
.sa_flags = SA_NOCLDSTOP };
291
char **custom_argv = NULL;
292
int custom_argc = 0;
170
char *plus_options = NULL;
171
char **plus_argv = NULL;
293
172
294
173
/* Establish a signal handler */
295
174
sigemptyset(&sigchld_action.sa_mask);
296
175
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
297
if(ret == -1){
176
if(ret < 0){
298
177
perror("sigaddset");
299
exitstatus = EXIT_FAILURE;
300
goto fallback;
178
exit(EXIT_FAILURE);
301
179
}
302
180
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
303
if(ret == -1){
181
if(ret < 0){
304
182
perror("sigaction");
305
exitstatus = EXIT_FAILURE;
306
goto fallback;
183
exit(EXIT_FAILURE);
307
184
}
308
185
309
186
/* The options we understand. */
311
188
{ .name = "global-options", .key = 'g',
312
189
.arg = "OPTION[,OPTION[,...]]",
313
190
.doc = "Options passed to all plugins" },
314
{ .name = "global-envs", .key = 'e',
315
.arg = "VAR=value",
316
.doc = "Environment variable passed to all plugins" },
317
191
{ .name = "options-for", .key = 'o',
318
192
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
319
193
.doc = "Options passed only to specified plugin" },
320
{ .name = "envs-for", .key = 'f',
321
.arg = "PLUGIN:ENV=value",
322
.doc = "Environment variable passed to specified plugin" },
323
194
{ .name = "disable", .key = 'd',
324
195
.arg = "PLUGIN",
325
196
.doc = "Disable a specific plugin", .group = 1 },
344
215
switch (key) {
345
216
case 'g':
346
217
if (arg != NULL){
347
char *p;
348
while((p = strsep(&arg, ",")) != NULL){
349
if(p[0] == '\0'){
350
continue;
351
}
352
if(not add_argument(getplugin(NULL, plugins), p)){
353
perror("add_argument");
354
return ARGP_ERR_UNKNOWN;
355
}
356
}
357
}
358
break;
359
case 'e':
360
if(arg == NULL){
361
break;
362
}
363
{
364
char *envdef = strdup(arg);
365
if(envdef == NULL){
366
break;
367
}
368
if(not add_environment(getplugin(NULL, plugins), envdef)){
369
perror("add_environment");
370
}
218
char *p = strtok(arg, ",");
219
do{
220
addargument(getplugin(NULL, plugins), p);
221
p = strtok(NULL, ",");
222
} while (p != NULL);
371
223
}
372
224
break;
373
225
case 'o':
374
226
if (arg != NULL){
375
char *p_name = strsep(&arg, ":");
376
if(p_name[0] == '\0'){
377
break;
378
}
379
char *opt = strsep(&arg, ":");
380
if(opt[0] == '\0'){
381
break;
382
}
383
if(opt != NULL){
384
char *p;
385
while((p = strsep(&opt, ",")) != NULL){
386
if(p[0] == '\0'){
387
continue;
388
}
389
if(not add_argument(getplugin(p_name, plugins), p)){
390
perror("add_argument");
391
return ARGP_ERR_UNKNOWN;
392
}
393
}
394
}
395
}
396
break;
397
case 'f':
398
if(arg == NULL){
399
break;
400
}
401
{
402
char *envdef = strchr(arg, ':');
403
if(envdef == NULL){
404
break;
405
}
406
char *p_name = strndup(arg, (size_t) (envdef-arg));
407
if(p_name == NULL){
408
break;
409
}
410
envdef++;
411
if(not add_environment(getplugin(p_name, plugins), envdef)){
412
perror("add_environment");
227
char *name = strtok(arg, ":");
228
char *p = strtok(NULL, ":");
229
if(p != NULL){
230
p = strtok(p, ",");
231
do{
232
addargument(getplugin(name, plugins), p);
233
p = strtok(NULL, ",");
234
} while (p != NULL);
413
235
}
414
236
}
415
237
break;
416
238
case 'd':
417
239
if (arg != NULL){
418
plugin *p = getplugin(arg, plugins);
419
if(p == NULL){
420
return ARGP_ERR_UNKNOWN;
421
}
422
p->disabled = true;
240
getplugin(arg, plugins)->disabled = true;
423
241
}
424
242
break;
425
243
case 128:
435
253
debug = true;
436
254
break;
437
255
case ARGP_KEY_ARG:
438
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
256
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
257
argp_usage (state);
258
}
259
plus_options = arg;
439
260
break;
440
261
case ARGP_KEY_END:
441
262
break;
451
272
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
452
273
.doc = "Mandos plugin runner -- Run plugins" };
453
274
454
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
455
if (ret == ARGP_ERR_UNKNOWN){
456
fprintf(stderr, "Unknown error while parsing arguments\n");
457
exitstatus = EXIT_FAILURE;
458
goto fallback;
459
}
460
461
conffp = fopen(argfile, "r");
462
if(conffp != NULL){
463
char *org_line = NULL;
464
char *p, *arg, *new_arg, *line;
465
size_t size = 0;
466
ssize_t sret;
467
const char whitespace_delims[] = " \r\t\f\v\n";
468
const char comment_delim[] = "#";
469
470
while(true){
471
sret = getline(&org_line, &size, conffp);
472
if(sret == -1){
473
break;
474
}
475
476
line = org_line;
477
arg = strsep(&line, comment_delim);
478
while((p = strsep(&arg, whitespace_delims)) != NULL){
479
if(p[0] == '\0'){
480
continue;
481
}
482
new_arg = strdup(p);
483
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
484
if (custom_argv == NULL){
485
perror("add_to_argv");
486
exitstatus = EXIT_FAILURE;
487
goto fallback;
488
}
489
}
490
}
491
free(org_line);
492
} else{
493
/* Check for harmful errors and go to fallback. Other errors might
494
not affect opening plugins */
495
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
496
perror("fopen");
497
exitstatus = EXIT_FAILURE;
498
goto fallback;
499
}
500
}
501
502
if(custom_argv != NULL){
503
custom_argv[0] = argv[0];
504
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
505
if (ret == ARGP_ERR_UNKNOWN){
506
fprintf(stderr, "Unknown error while parsing arguments\n");
507
exitstatus = EXIT_FAILURE;
508
goto fallback;
509
}
275
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
276
277
if(plus_options){
278
/* This is a mangled argument in the form of
279
"+--option+--other-option=parameter+--yet-another-option", etc */
280
/* Make new argc and argv vars, and call argp_parse() again. */
281
plus_options++; /* skip the first '+' character */
282
const char delims[] = "+";
283
char *arg;
284
int new_argc = 1;
285
plus_argv = malloc(sizeof(char*) * 2);
286
if(plus_argv == NULL){
287
perror("malloc");
288
exitstatus = EXIT_FAILURE;
289
goto end;
290
}
291
plus_argv[0] = argv[0];
292
plus_argv[1] = NULL;
293
arg = strtok(plus_options, delims); /* Get first argument */
294
while(arg != NULL){
295
new_argc++;
296
plus_argv = realloc(plus_argv, sizeof(char *)
297
* ((unsigned int) new_argc + 1));
298
if(plus_argv == NULL){
299
perror("malloc");
300
exitstatus = EXIT_FAILURE;
301
goto end;
302
}
303
plus_argv[new_argc-1] = arg;
304
plus_argv[new_argc] = NULL;
305
arg = strtok(NULL, delims); /* Get next argument */
306
}
307
argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
510
308
}
511
309
512
310
if(debug){
516
314
for(char **a = p->argv; *a != NULL; a++){
517
315
fprintf(stderr, "\tArg: %s\n", *a);
518
316
}
519
fprintf(stderr, "...and %u environment variables\n", p->envc);
520
for(char **a = p->environ; *a != NULL; a++){
521
fprintf(stderr, "\t%s\n", *a);
522
}
523
317
}
524
318
}
525
319
537
331
if(dir == NULL){
538
332
perror("Could not open plugin dir");
539
333
exitstatus = EXIT_FAILURE;
540
goto fallback;
334
goto end;
541
335
}
542
336
543
337
/* Set the FD_CLOEXEC flag on the directory, if possible */
548
342
if(ret < 0){
549
343
perror("set_cloexec_flag");
550
344
exitstatus = EXIT_FAILURE;
551
goto fallback;
345
goto end;
552
346
}
553
347
}
554
348
}
560
354
561
355
// All directory entries have been processed
562
356
if(dirst == NULL){
563
if (errno == EBADF){
564
perror("readdir");
565
exitstatus = EXIT_FAILURE;
566
goto fallback;
567
}
568
357
break;
569
358
}
570
359
614
403
continue;
615
404
}
616
405
}
617
618
char *filename;
619
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
620
if(ret < 0){
621
perror("asprintf");
622
continue;
623
}
624
625
ret = stat(filename, &st);
626
if (ret == -1){
627
perror("stat");
628
free(filename);
629
continue;
630
}
406
407
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
408
if (filename == NULL){
409
perror("malloc");
410
exitstatus = EXIT_FAILURE;
411
goto end;
412
}
413
strcpy(filename, plugindir); /* Spurious warning */
414
strcat(filename, "/"); /* Spurious warning */
415
strcat(filename, dirst->d_name); /* Spurious warning */
416
417
stat(filename, &st);
631
418
632
419
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
633
420
if(debug){
637
424
free(filename);
638
425
continue;
639
426
}
640
plugin *p = getplugin(dirst->d_name, &plugin_list);
641
if(p == NULL){
642
perror("getplugin");
643
free(filename);
644
continue;
645
}
646
if(p->disabled){
427
if(getplugin(dirst->d_name, &plugin_list)->disabled){
647
428
if(debug){
648
429
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
649
430
dirst->d_name);
651
432
free(filename);
652
433
continue;
653
434
}
435
plugin *p = getplugin(dirst->d_name, &plugin_list);
654
436
{
655
437
/* Add global arguments to argument list for this plugin */
656
438
plugin *g = getplugin(NULL, &plugin_list);
657
if(g != NULL){
658
for(char **a = g->argv + 1; *a != NULL; a++){
659
if(not add_argument(p, *a)){
660
perror("add_argument");
661
}
662
}
663
/* Add global environment variables */
664
for(char **e = g->environ; *e != NULL; e++){
665
if(not add_environment(p, *e)){
666
perror("add_environment");
667
}
668
}
669
}
670
}
671
/* If this plugin has any environment variables, we will call
672
using execve and need to duplicate the environment from this
673
process, too. */
674
if(p->environ[0] != NULL){
675
for(char **e = environ; *e != NULL; e++){
676
char *copy = strdup(*e);
677
if(copy == NULL){
678
perror("strdup");
679
continue;
680
}
681
if(not add_environment(p, copy)){
682
perror("add_environment");
683
}
684
}
685
}
686
687
int pipefd[2];
439
for(char **a = g->argv + 1; *a != NULL; a++){
440
addargument(p, *a);
441
}
442
}
443
int pipefd[2];
688
444
ret = pipe(pipefd);
689
445
if (ret == -1){
690
446
perror("pipe");
691
447
exitstatus = EXIT_FAILURE;
692
goto fallback;
448
goto end;
693
449
}
694
450
ret = set_cloexec_flag(pipefd[0]);
695
451
if(ret < 0){
696
452
perror("set_cloexec_flag");
697
453
exitstatus = EXIT_FAILURE;
698
goto fallback;
454
goto end;
699
455
}
700
456
ret = set_cloexec_flag(pipefd[1]);
701
457
if(ret < 0){
702
458
perror("set_cloexec_flag");
703
459
exitstatus = EXIT_FAILURE;
704
goto fallback;
460
goto end;
705
461
}
706
462
/* Block SIGCHLD until process is safely in process list */
707
463
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
708
464
if(ret < 0){
709
465
perror("sigprocmask");
710
466
exitstatus = EXIT_FAILURE;
711
goto fallback;
467
goto end;
712
468
}
713
469
// Starting a new process to be watched
714
470
pid_t pid = fork();
715
if(pid == -1){
716
perror("fork");
717
exitstatus = EXIT_FAILURE;
718
goto fallback;
719
}
720
471
if(pid == 0){
721
472
/* this is the child process */
722
473
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
729
480
perror("sigprocmask");
730
481
_exit(EXIT_FAILURE);
731
482
}
732
733
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
734
if(ret == -1){
735
perror("dup2");
736
_exit(EXIT_FAILURE);
737
}
483
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
738
484
739
485
if(dirfd(dir) < 0){
740
486
/* If dir has no file descriptor, we could not set FD_CLOEXEC
741
487
above and must now close it manually here. */
742
488
closedir(dir);
743
489
}
744
if(p->environ[0] == NULL){
745
if(execv(filename, p->argv) < 0){
746
perror("execv");
747
_exit(EXIT_FAILURE);
748
}
749
} else {
750
if(execve(filename, p->argv, p->environ) < 0){
751
perror("execve");
752
_exit(EXIT_FAILURE);
753
}
490
if(execv(filename, p->argv) < 0){
491
perror("execv");
492
_exit(EXIT_FAILURE);
754
493
}
755
494
/* no return */
756
495
}
765
504
perror("sigprocmask");
766
505
}
767
506
exitstatus = EXIT_FAILURE;
768
goto fallback;
507
goto end;
769
508
}
770
509
771
510
*new_process = (struct process){ .pid = pid,
779
518
if(ret < 0){
780
519
perror("sigprocmask");
781
520
exitstatus = EXIT_FAILURE;
782
goto fallback;
521
goto end;
783
522
}
784
523
785
524
FD_SET(new_process->fd, &rfds_all);
790
529
791
530
}
792
531
793
free_plugin_list(plugin_list);
794
plugin_list = NULL;
532
/* Free the plugin list */
533
for(plugin *next; plugin_list != NULL; plugin_list = next){
534
next = plugin_list->next;
535
free(plugin_list->argv);
536
free(plugin_list);
537
}
795
538
796
539
closedir(dir);
797
540
dir = NULL;
798
541
799
542
if (process_list == NULL){
800
fprintf(stderr, "No plugin processes started. Incorrect plugin"
801
" directory?\n");
802
process_list = NULL;
543
fprintf(stderr, "No plugin processes started, exiting\n");
544
exitstatus = EXIT_FAILURE;
545
goto end;
803
546
}
804
547
while(process_list){
805
548
fd_set rfds = rfds_all;
807
550
if (select_ret == -1){
808
551
perror("select");
809
552
exitstatus = EXIT_FAILURE;
810
goto fallback;
553
goto end;
811
554
}
812
555
/* OK, now either a process completed, or something can be read
813
556
from one of them */
820
563
/* Bad exit by plugin */
821
564
if(debug){
822
565
if(WIFEXITED(proc->status)){
823
fprintf(stderr, "Plugin %u exited with status %d\n",
824
(unsigned int) (proc->pid),
825
WEXITSTATUS(proc->status));
566
fprintf(stderr, "Plugin %d exited with status %d\n",
567
proc->pid, WEXITSTATUS(proc->status));
826
568
} else if(WIFSIGNALED(proc->status)) {
827
fprintf(stderr, "Plugin %u killed by signal %d\n",
828
(unsigned int) (proc->pid),
829
WTERMSIG(proc->status));
569
fprintf(stderr, "Plugin %d killed by signal %d\n",
570
proc->pid, WTERMSIG(proc->status));
830
571
} else if(WCOREDUMP(proc->status)){
831
fprintf(stderr, "Plugin %d dumped core\n",
832
(unsigned int) (proc->pid));
572
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
833
573
}
834
574
}
835
575
/* Remove the plugin */
839
579
if(ret < 0){
840
580
perror("sigprocmask");
841
581
exitstatus = EXIT_FAILURE;
842
goto fallback;
582
goto end;
843
583
}
844
584
/* Delete this process entry from the list */
845
585
if(process_list == proc){
868
608
break;
869
609
}
870
610
/* This process exited nicely, so print its buffer */
871
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
873
if(not bret){
874
perror("print_out_password");
875
exitstatus = EXIT_FAILURE;
611
for(size_t written = 0; written < proc->buffer_length;
612
written += (size_t)ret){
613
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
614
proc->buffer + written,
615
proc->buffer_length
616
- written));
617
if(ret < 0){
618
perror("write");
619
exitstatus = EXIT_FAILURE;
620
goto end;
621
}
876
622
}
877
goto fallback;
623
goto end;
878
624
}
879
625
/* This process has not completed. Does it have any output? */
880
626
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
888
634
if (proc->buffer == NULL){
889
635
perror("malloc");
890
636
exitstatus = EXIT_FAILURE;
891
goto fallback;
637
goto end;
892
638
}
893
639
proc->buffer_size += BUFFER_SIZE;
894
640
}
907
653
}
908
654
}
909
655
}
910
911
912
fallback:
913
914
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
916
bool bret;
917
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
918
char *passwordbuffer = getpass("Password: ");
919
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
920
if(not bret){
921
perror("print_out_password");
922
exitstatus = EXIT_FAILURE;
923
}
656
if(process_list == NULL){
657
fprintf(stderr, "All plugin processes failed, exiting\n");
658
exitstatus = EXIT_FAILURE;
924
659
}
925
660
661
end:
926
662
/* Restore old signal handler */
927
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
928
if(ret == -1){
929
perror("sigaction");
930
exitstatus = EXIT_FAILURE;
931
}
932
933
if(custom_argv != NULL){
934
for(char **arg = custom_argv; *arg != NULL; arg++){
935
free(*arg);
936
}
937
free(custom_argv);
938
}
939
free_plugin_list(plugin_list);
663
sigaction(SIGCHLD, &old_sigchld_action, NULL);
664
665
free(plus_argv);
666
667
/* Free the plugin list */
668
for(plugin *next; plugin_list != NULL; plugin_list = next){
669
next = plugin_list->next;
670
free(plugin_list->argv);
671
free(plugin_list);
672
}
940
673
941
674
if(dir != NULL){
942
675
closedir(dir);
946
679
for(process *next; process_list != NULL; process_list = next){
947
680
next = process_list->next;
948
681
close(process_list->fd);
949
ret = kill(process_list->pid, SIGTERM);
950
if(ret == -1 and errno != ESRCH){
951
/* set-uid proccesses migth not get closed */
952
perror("kill");
953
}
682
kill(process_list->pid, SIGTERM);
954
683
free(process_list->buffer);
955
684
free(process_list);
956
685
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0