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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,
60
error_t */
61
#include <signal.h> /* struct sigaction, sigemptyset(),
62
sigaddset(), sigaction(),
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
65
#include <errno.h> /* errno, EBADF */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
51
argp_parse() */
66
52
67
53
#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
54
73
55
struct process;
74
56
79
61
size_t buffer_size;
80
62
size_t buffer_length;
81
63
bool eof;
82
volatile bool completed;
83
volatile int status;
64
bool completed;
65
int status;
84
66
struct process *next;
85
67
} process;
86
68
88
70
char *name; /* can be NULL or any plugin name */
89
71
char **argv;
90
72
int argc;
91
char **environ;
92
int envc;
93
73
bool disabled;
94
74
struct plugin *next;
95
75
} plugin;
104
84
/* Create a new plugin */
105
85
plugin *new_plugin = malloc(sizeof(plugin));
106
86
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
87
perror("malloc");
88
exit(EXIT_FAILURE);
89
}
90
new_plugin->name = name;
123
91
new_plugin->argv = malloc(sizeof(char *) * 2);
124
92
if (new_plugin->argv == NULL){
125
free(copy_name);
126
free(new_plugin);
127
return NULL;
93
perror("malloc");
94
exit(EXIT_FAILURE);
128
95
}
129
new_plugin->argv[0] = copy_name;
96
new_plugin->argv[0] = name;
130
97
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;
98
new_plugin->argc = 1;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
140
101
/* Append the new plugin to the list */
141
102
*plugin_list = new_plugin;
142
103
return new_plugin;
143
104
}
144
105
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
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
}
184
116
185
117
/*
186
118
* Based on the example in the GNU LibC manual chapter 13.13 "File
198
130
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
199
131
}
200
132
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
201
136
process *process_list = NULL;
202
137
203
/* Mark processes as completed when they exit, and save their exit
138
/* Mark a process as completed when it exits, and save its exit
204
139
status. */
205
140
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
static void free_plugin_list(plugin *plugin_list){
251
for(plugin *next; plugin_list != NULL; plugin_list = next){
252
next = plugin_list->next;
253
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
254
free(*arg);
255
}
256
free(plugin_list->argv);
257
for(char **env = plugin_list->environ; *env != NULL; env++){
258
free(*env);
259
}
260
free(plugin_list->environ);
261
free(plugin_list);
262
}
141
process *proc = process_list;
142
int status;
143
pid_t pid = wait(&status);
144
while(proc != NULL and proc->pid != pid){
145
proc = proc->next;
146
}
147
if(proc == NULL){
148
/* Process not found in process list */
149
return;
150
}
151
proc->status = status;
152
proc->completed = true;
263
153
}
264
154
265
155
int main(int argc, char *argv[]){
266
const char *plugindir = "/lib/mandos/plugins.d";
267
const char *argfile = ARGFILE;
268
FILE *conffp;
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
269
157
size_t d_name_len;
270
158
DIR *dir = NULL;
271
159
struct dirent *dirst;
279
167
struct sigaction old_sigchld_action;
280
168
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
281
169
.sa_flags = SA_NOCLDSTOP };
282
char **custom_argv = NULL;
283
int custom_argc = 0;
170
char *plus_options = NULL;
171
char **plus_argv = NULL;
284
172
285
173
/* Establish a signal handler */
286
174
sigemptyset(&sigchld_action.sa_mask);
287
175
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
288
if(ret == -1){
176
if(ret < 0){
289
177
perror("sigaddset");
290
exitstatus = EXIT_FAILURE;
291
goto fallback;
178
exit(EXIT_FAILURE);
292
179
}
293
180
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
294
if(ret == -1){
181
if(ret < 0){
295
182
perror("sigaction");
296
exitstatus = EXIT_FAILURE;
297
goto fallback;
183
exit(EXIT_FAILURE);
298
184
}
299
185
300
186
/* The options we understand. */
302
188
{ .name = "global-options", .key = 'g',
303
189
.arg = "OPTION[,OPTION[,...]]",
304
190
.doc = "Options passed to all plugins" },
305
{ .name = "global-envs", .key = 'e',
306
.arg = "VAR=value",
307
.doc = "Environment variable passed to all plugins" },
308
191
{ .name = "options-for", .key = 'o',
309
192
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
310
193
.doc = "Options passed only to specified plugin" },
311
{ .name = "envs-for", .key = 'f',
312
.arg = "PLUGIN:ENV=value",
313
.doc = "Environment variable passed to specified plugin" },
314
194
{ .name = "disable", .key = 'd',
315
195
.arg = "PLUGIN",
316
196
.doc = "Disable a specific plugin", .group = 1 },
335
215
switch (key) {
336
216
case 'g':
337
217
if (arg != NULL){
338
char *p;
339
while((p = strsep(&arg, ",")) != NULL){
340
if(p[0] == '\0'){
341
continue;
342
}
343
if(not add_argument(getplugin(NULL, plugins), p)){
344
perror("add_argument");
345
return ARGP_ERR_UNKNOWN;
346
}
347
}
348
}
349
break;
350
case 'e':
351
if(arg == NULL){
352
break;
353
}
354
{
355
char *envdef = strdup(arg);
356
if(envdef == NULL){
357
break;
358
}
359
if(not add_environment(getplugin(NULL, plugins), envdef)){
360
perror("add_environment");
361
}
218
char *p = strtok(arg, ",");
219
do{
220
addargument(getplugin(NULL, plugins), p);
221
p = strtok(NULL, ",");
222
} while (p != NULL);
362
223
}
363
224
break;
364
225
case 'o':
365
226
if (arg != NULL){
366
char *p_name = strsep(&arg, ":");
367
if(p_name[0] == '\0'){
368
break;
369
}
370
char *opt = strsep(&arg, ":");
371
if(opt[0] == '\0'){
372
break;
373
}
374
if(opt != NULL){
375
char *p;
376
while((p = strsep(&opt, ",")) != NULL){
377
if(p[0] == '\0'){
378
continue;
379
}
380
if(not add_argument(getplugin(p_name, plugins), p)){
381
perror("add_argument");
382
return ARGP_ERR_UNKNOWN;
383
}
384
}
385
}
386
}
387
break;
388
case 'f':
389
if(arg == NULL){
390
break;
391
}
392
{
393
char *envdef = strchr(arg, ':');
394
if(envdef == NULL){
395
break;
396
}
397
char *p_name = strndup(arg, (size_t) (envdef-arg));
398
if(p_name == NULL){
399
break;
400
}
401
envdef++;
402
if(not add_environment(getplugin(p_name, plugins), envdef)){
403
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);
404
235
}
405
236
}
406
237
break;
407
238
case 'd':
408
239
if (arg != NULL){
409
plugin *p = getplugin(arg, plugins);
410
if(p == NULL){
411
return ARGP_ERR_UNKNOWN;
412
}
413
p->disabled = true;
240
getplugin(arg, plugins)->disabled = true;
414
241
}
415
242
break;
416
243
case 128:
426
253
debug = true;
427
254
break;
428
255
case ARGP_KEY_ARG:
429
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;
430
260
break;
431
261
case ARGP_KEY_END:
432
262
break;
442
272
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
443
273
.doc = "Mandos plugin runner -- Run plugins" };
444
274
445
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
446
if (ret == ARGP_ERR_UNKNOWN){
447
fprintf(stderr, "Unknown error while parsing arguments\n");
448
exitstatus = EXIT_FAILURE;
449
goto fallback;
450
}
451
452
conffp = fopen(argfile, "r");
453
if(conffp != NULL){
454
char *org_line = NULL;
455
char *p, *arg, *new_arg, *line;
456
size_t size = 0;
457
ssize_t sret;
458
const char whitespace_delims[] = " \r\t\f\v\n";
459
const char comment_delim[] = "#";
460
461
custom_argc = 1;
462
custom_argv = malloc(sizeof(char*) * 2);
463
if(custom_argv == NULL){
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){
464
287
perror("malloc");
465
288
exitstatus = EXIT_FAILURE;
466
goto fallback;
467
}
468
custom_argv[0] = argv[0];
469
custom_argv[1] = NULL;
470
471
while(true){
472
sret = getline(&org_line, &size, conffp);
473
if(sret == -1){
474
break;
475
}
476
477
line = org_line;
478
arg = strsep(&line, comment_delim);
479
while((p = strsep(&arg, whitespace_delims)) != NULL){
480
if(p[0] == '\0'){
481
continue;
482
}
483
new_arg = strdup(p);
484
485
custom_argc += 1;
486
custom_argv = realloc(custom_argv, sizeof(char *)
487
* ((unsigned int) custom_argc + 1));
488
if(custom_argv == NULL){
489
perror("realloc");
490
exitstatus = EXIT_FAILURE;
491
free(org_line);
492
goto fallback;
493
}
494
custom_argv[custom_argc-1] = new_arg;
495
custom_argv[custom_argc] = NULL;
496
}
497
}
498
free(org_line);
499
} else{
500
/* Check for harmful errors and go to fallback. Other errors might
501
not affect opening plugins */
502
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
503
perror("fopen");
504
exitstatus = EXIT_FAILURE;
505
goto fallback;
506
}
507
}
508
509
if(custom_argv != NULL){
510
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
511
if (ret == ARGP_ERR_UNKNOWN){
512
fprintf(stderr, "Unknown error while parsing arguments\n");
513
exitstatus = EXIT_FAILURE;
514
goto fallback;
515
}
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);
516
308
}
517
309
518
310
if(debug){
522
314
for(char **a = p->argv; *a != NULL; a++){
523
315
fprintf(stderr, "\tArg: %s\n", *a);
524
316
}
525
fprintf(stderr, "...and %u environment variables\n", p->envc);
526
for(char **a = p->environ; *a != NULL; a++){
527
fprintf(stderr, "\t%s\n", *a);
528
}
529
317
}
530
318
}
531
319
543
331
if(dir == NULL){
544
332
perror("Could not open plugin dir");
545
333
exitstatus = EXIT_FAILURE;
546
goto fallback;
334
goto end;
547
335
}
548
336
549
337
/* Set the FD_CLOEXEC flag on the directory, if possible */
554
342
if(ret < 0){
555
343
perror("set_cloexec_flag");
556
344
exitstatus = EXIT_FAILURE;
557
goto fallback;
345
goto end;
558
346
}
559
347
}
560
348
}
566
354
567
355
// All directory entries have been processed
568
356
if(dirst == NULL){
569
if (errno == EBADF){
570
perror("readdir");
571
exitstatus = EXIT_FAILURE;
572
goto fallback;
573
}
574
357
break;
575
358
}
576
359
620
403
continue;
621
404
}
622
405
}
623
624
char *filename;
625
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
626
if(ret < 0){
627
perror("asprintf");
628
continue;
629
}
630
631
ret = stat(filename, &st);
632
if (ret == -1){
633
perror("stat");
634
free(filename);
635
continue;
636
}
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);
637
418
638
419
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
639
420
if(debug){
643
424
free(filename);
644
425
continue;
645
426
}
646
plugin *p = getplugin(dirst->d_name, &plugin_list);
647
if(p == NULL){
648
perror("getplugin");
649
free(filename);
650
continue;
651
}
652
if(p->disabled){
427
if(getplugin(dirst->d_name, &plugin_list)->disabled){
653
428
if(debug){
654
429
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
655
430
dirst->d_name);
657
432
free(filename);
658
433
continue;
659
434
}
435
plugin *p = getplugin(dirst->d_name, &plugin_list);
660
436
{
661
437
/* Add global arguments to argument list for this plugin */
662
438
plugin *g = getplugin(NULL, &plugin_list);
663
if(g != NULL){
664
for(char **a = g->argv + 1; *a != NULL; a++){
665
if(not add_argument(p, *a)){
666
perror("add_argument");
667
}
668
}
669
/* Add global environment variables */
670
for(char **e = g->environ; *e != NULL; e++){
671
if(not add_environment(p, *e)){
672
perror("add_environment");
673
}
674
}
675
}
676
}
677
/* If this plugin has any environment variables, we will call
678
using execve and need to duplicate the environment from this
679
process, too. */
680
if(p->environ[0] != NULL){
681
for(char **e = environ; *e != NULL; e++){
682
char *copy = strdup(*e);
683
if(copy == NULL){
684
perror("strdup");
685
continue;
686
}
687
if(not add_environment(p, copy)){
688
perror("add_environment");
689
}
690
}
691
}
692
693
int pipefd[2];
439
for(char **a = g->argv + 1; *a != NULL; a++){
440
addargument(p, *a);
441
}
442
}
443
int pipefd[2];
694
444
ret = pipe(pipefd);
695
445
if (ret == -1){
696
446
perror("pipe");
697
447
exitstatus = EXIT_FAILURE;
698
goto fallback;
448
goto end;
699
449
}
700
450
ret = set_cloexec_flag(pipefd[0]);
701
451
if(ret < 0){
702
452
perror("set_cloexec_flag");
703
453
exitstatus = EXIT_FAILURE;
704
goto fallback;
454
goto end;
705
455
}
706
456
ret = set_cloexec_flag(pipefd[1]);
707
457
if(ret < 0){
708
458
perror("set_cloexec_flag");
709
459
exitstatus = EXIT_FAILURE;
710
goto fallback;
460
goto end;
711
461
}
712
462
/* Block SIGCHLD until process is safely in process list */
713
463
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
714
464
if(ret < 0){
715
465
perror("sigprocmask");
716
466
exitstatus = EXIT_FAILURE;
717
goto fallback;
467
goto end;
718
468
}
719
469
// Starting a new process to be watched
720
470
pid_t pid = fork();
721
if(pid == -1){
722
perror("fork");
723
exitstatus = EXIT_FAILURE;
724
goto fallback;
725
}
726
471
if(pid == 0){
727
472
/* this is the child process */
728
473
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
735
480
perror("sigprocmask");
736
481
_exit(EXIT_FAILURE);
737
482
}
738
739
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
740
if(ret == -1){
741
perror("dup2");
742
_exit(EXIT_FAILURE);
743
}
483
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
744
484
745
485
if(dirfd(dir) < 0){
746
486
/* If dir has no file descriptor, we could not set FD_CLOEXEC
747
487
above and must now close it manually here. */
748
488
closedir(dir);
749
489
}
750
if(p->environ[0] == NULL){
751
if(execv(filename, p->argv) < 0){
752
perror("execv");
753
_exit(EXIT_FAILURE);
754
}
755
} else {
756
if(execve(filename, p->argv, p->environ) < 0){
757
perror("execve");
758
_exit(EXIT_FAILURE);
759
}
490
if(execv(filename, p->argv) < 0){
491
perror("execv");
492
_exit(EXIT_FAILURE);
760
493
}
761
494
/* no return */
762
495
}
771
504
perror("sigprocmask");
772
505
}
773
506
exitstatus = EXIT_FAILURE;
774
goto fallback;
507
goto end;
775
508
}
776
509
777
510
*new_process = (struct process){ .pid = pid,
785
518
if(ret < 0){
786
519
perror("sigprocmask");
787
520
exitstatus = EXIT_FAILURE;
788
goto fallback;
521
goto end;
789
522
}
790
523
791
524
FD_SET(new_process->fd, &rfds_all);
796
529
797
530
}
798
531
799
free_plugin_list(plugin_list);
800
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
}
801
538
802
539
closedir(dir);
803
540
dir = NULL;
804
541
805
542
if (process_list == NULL){
806
fprintf(stderr, "No plugin processes started. Incorrect plugin"
807
" directory?\n");
808
process_list = NULL;
543
fprintf(stderr, "No plugin processes started, exiting\n");
544
exitstatus = EXIT_FAILURE;
545
goto end;
809
546
}
810
547
while(process_list){
811
548
fd_set rfds = rfds_all;
813
550
if (select_ret == -1){
814
551
perror("select");
815
552
exitstatus = EXIT_FAILURE;
816
goto fallback;
553
goto end;
817
554
}
818
555
/* OK, now either a process completed, or something can be read
819
556
from one of them */
826
563
/* Bad exit by plugin */
827
564
if(debug){
828
565
if(WIFEXITED(proc->status)){
829
fprintf(stderr, "Plugin %u exited with status %d\n",
830
(unsigned int) (proc->pid),
831
WEXITSTATUS(proc->status));
566
fprintf(stderr, "Plugin %d exited with status %d\n",
567
proc->pid, WEXITSTATUS(proc->status));
832
568
} else if(WIFSIGNALED(proc->status)) {
833
fprintf(stderr, "Plugin %u killed by signal %d\n",
834
(unsigned int) (proc->pid),
835
WTERMSIG(proc->status));
569
fprintf(stderr, "Plugin %d killed by signal %d\n",
570
proc->pid, WTERMSIG(proc->status));
836
571
} else if(WCOREDUMP(proc->status)){
837
fprintf(stderr, "Plugin %d dumped core\n",
838
(unsigned int) (proc->pid));
572
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
839
573
}
840
574
}
841
575
/* Remove the plugin */
842
576
FD_CLR(proc->fd, &rfds_all);
843
577
/* Block signal while modifying process_list */
844
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
578
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
845
579
if(ret < 0){
846
580
perror("sigprocmask");
847
581
exitstatus = EXIT_FAILURE;
848
goto fallback;
582
goto end;
849
583
}
850
584
/* Delete this process entry from the list */
851
585
if(process_list == proc){
874
608
break;
875
609
}
876
610
/* This process exited nicely, so print its buffer */
877
878
bool bret = print_out_password(proc->buffer,
879
proc->buffer_length);
880
if(not bret){
881
perror("print_out_password");
882
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
}
883
622
}
884
goto fallback;
623
goto end;
885
624
}
886
625
/* This process has not completed. Does it have any output? */
887
626
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
895
634
if (proc->buffer == NULL){
896
635
perror("malloc");
897
636
exitstatus = EXIT_FAILURE;
898
goto fallback;
637
goto end;
899
638
}
900
639
proc->buffer_size += BUFFER_SIZE;
901
640
}
914
653
}
915
654
}
916
655
}
917
918
919
fallback:
920
921
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
922
/* Fallback if all plugins failed, none are found or an error
923
occured */
924
bool bret;
925
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
926
char *passwordbuffer = getpass("Password: ");
927
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
928
if(not bret){
929
perror("print_out_password");
930
exitstatus = EXIT_FAILURE;
931
}
656
if(process_list == NULL){
657
fprintf(stderr, "All plugin processes failed, exiting\n");
658
exitstatus = EXIT_FAILURE;
932
659
}
933
660
661
end:
934
662
/* Restore old signal handler */
935
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
936
if(ret == -1){
937
perror("sigaction");
938
exitstatus = EXIT_FAILURE;
939
}
940
941
if(custom_argv != NULL){
942
for(char **arg = custom_argv+1; *arg != NULL; arg++){
943
free(*arg);
944
}
945
free(custom_argv);
946
}
947
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
}
948
673
949
674
if(dir != NULL){
950
675
closedir(dir);
954
679
for(process *next; process_list != NULL; process_list = next){
955
680
next = process_list->next;
956
681
close(process_list->fd);
957
ret = kill(process_list->pid, SIGTERM);
958
if(ret == -1 and errno != ESRCH){
959
/* set-uid proccesses migth not get closed */
960
perror("kill");
961
}
682
kill(process_list->pid, SIGTERM);
962
683
free(process_list->buffer);
963
684
free(process_list);
964
685
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0