To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to mandos-client.c
- browse files at revision 24.1.33
- compare with another revision
- download diff
- download tarball
- view history from revision 24.1.33
- Committer: Björn Påhlsson
- Date: 2008-08-10 00:07:24 UTC
- mfrom: (56 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 58.
- Revision ID: belorn@braxen-20080810000724-zm9y5iasq9iujuo5
synopsis changed
- files added:
- network-protocol.txt
- files removed:
- .bzrignore
- 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,
66
66
67
67
#define BUFFER_SIZE 256
68
68
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
69
struct process;
76
70
77
71
typedef struct process{
81
75
size_t buffer_size;
82
76
size_t buffer_length;
83
77
bool eof;
84
volatile bool completed;
85
volatile int status;
78
bool completed;
79
int status;
86
80
struct process *next;
87
81
} process;
88
82
90
84
char *name; /* can be NULL or any plugin name */
91
85
char **argv;
92
86
int argc;
93
char **environ;
94
int envc;
95
87
bool disabled;
96
88
struct plugin *next;
97
89
} plugin;
106
98
/* Create a new plugin */
107
99
plugin *new_plugin = malloc(sizeof(plugin));
108
100
if (new_plugin == NULL){
109
return NULL;
110
}
111
char *copy_name = NULL;
112
if(name != NULL){
113
copy_name = strdup(name);
114
if(copy_name == NULL){
115
return NULL;
116
}
117
}
118
119
*new_plugin = (plugin) { .name = copy_name,
120
.argc = 1,
121
.envc = 0,
122
.disabled = false,
123
.next = *plugin_list };
124
101
perror("malloc");
102
exit(EXIT_FAILURE);
103
}
104
new_plugin->name = name;
125
105
new_plugin->argv = malloc(sizeof(char *) * 2);
126
106
if (new_plugin->argv == NULL){
127
free(copy_name);
128
free(new_plugin);
129
return NULL;
107
perror("malloc");
108
exit(EXIT_FAILURE);
130
109
}
131
new_plugin->argv[0] = copy_name;
110
new_plugin->argv[0] = name;
132
111
new_plugin->argv[1] = NULL;
133
134
new_plugin->environ = malloc(sizeof(char *));
135
if(new_plugin->environ == NULL){
136
free(copy_name);
137
free(new_plugin->argv);
138
free(new_plugin);
139
return NULL;
140
}
141
new_plugin->environ[0] = NULL;
112
new_plugin->argc = 1;
113
new_plugin->disabled = false;
114
new_plugin->next = *plugin_list;
142
115
/* Append the new plugin to the list */
143
116
*plugin_list = new_plugin;
144
117
return new_plugin;
145
118
}
146
119
147
/* Helper function for add_argument and add_environment */
148
static bool add_to_char_array(const char *new, char ***array,
149
int *len){
150
/* Resize the pointed-to array to hold one more pointer */
151
*array = realloc(*array, sizeof(char *)
152
* (size_t) ((*len) + 2));
153
/* Malloc check */
154
if(*array == NULL){
155
return false;
156
}
157
/* Make a copy of the new string */
158
char *copy = strdup(new);
159
if(copy == NULL){
160
return false;
161
}
162
/* Insert the copy */
163
(*array)[*len] = copy;
164
(*len)++;
165
/* Add a new terminating NULL pointer to the last element */
166
(*array)[*len] = NULL;
167
return true;
168
}
169
170
/* Add to a plugin's argument vector */
171
static bool add_argument(plugin *p, const char *arg){
172
if(p == NULL){
173
return false;
174
}
175
return add_to_char_array(arg, &(p->argv), &(p->argc));
176
}
177
178
/* Add to a plugin's environment */
179
static bool add_environment(plugin *p, const char *def){
180
if(p == NULL){
181
return false;
182
}
183
return add_to_char_array(def, &(p->environ), &(p->envc));
184
}
185
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
}
186
130
187
131
/*
188
132
* Based on the example in the GNU LibC manual chapter 13.13 "File
200
144
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
201
145
}
202
146
147
const char *argp_program_version = "plugbasedclient 0.9";
148
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
149
203
150
process *process_list = NULL;
204
151
205
/* Mark processes as completed when they exit, and save their exit
152
/* Mark a process as completed when it exits, and save its exit
206
153
status. */
207
154
void handle_sigchld(__attribute__((unused)) int sig){
208
while(true){
209
process *proc = process_list;
210
int status;
211
pid_t pid = waitpid(-1, &status, WNOHANG);
212
if(pid == 0){
213
/* Only still running child processes */
214
break;
215
}
216
if(pid == -1){
217
if (errno != ECHILD){
218
perror("waitpid");
219
}
220
/* No child processes */
221
break;
222
}
223
224
/* A child exited, find it in process_list */
225
while(proc != NULL and proc->pid != pid){
226
proc = proc->next;
227
}
228
if(proc == NULL){
229
/* Process not found in process list */
230
continue;
231
}
232
proc->status = status;
233
proc->completed = true;
234
}
235
}
236
237
bool print_out_password(const char *buffer, size_t length){
238
ssize_t ret;
239
if(length>0 and buffer[length-1] == '\n'){
240
length--;
241
}
242
for(size_t written = 0; written < length; written += (size_t)ret){
243
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
244
length - written));
245
if(ret < 0){
246
return false;
247
}
248
}
249
return true;
250
}
251
252
static void free_plugin_list(plugin *plugin_list){
253
for(plugin *next; plugin_list != NULL; plugin_list = next){
254
next = plugin_list->next;
255
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
256
free(*arg);
257
}
258
free(plugin_list->argv);
259
for(char **env = plugin_list->environ; *env != NULL; env++){
260
free(*env);
261
}
262
free(plugin_list->environ);
263
free(plugin_list);
264
}
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;
265
171
}
266
172
267
173
int main(int argc, char *argv[]){
268
char *plugindir = NULL;
269
char *argfile = NULL;
270
FILE *conffp;
174
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
271
175
size_t d_name_len;
272
176
DIR *dir = NULL;
273
177
struct dirent *dirst;
281
185
struct sigaction old_sigchld_action;
282
186
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
283
187
.sa_flags = SA_NOCLDSTOP };
284
char **custom_argv = NULL;
285
int custom_argc = 0;
188
char *plus_options = NULL;
189
char **plus_argv = NULL;
286
190
287
191
/* Establish a signal handler */
288
192
sigemptyset(&sigchld_action.sa_mask);
289
193
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
290
if(ret == -1){
194
if(ret < 0){
291
195
perror("sigaddset");
292
exitstatus = EXIT_FAILURE;
293
goto fallback;
196
exit(EXIT_FAILURE);
294
197
}
295
198
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
296
if(ret == -1){
199
if(ret < 0){
297
200
perror("sigaction");
298
exitstatus = EXIT_FAILURE;
299
goto fallback;
201
exit(EXIT_FAILURE);
300
202
}
301
203
302
204
/* The options we understand. */
304
206
{ .name = "global-options", .key = 'g',
305
207
.arg = "OPTION[,OPTION[,...]]",
306
208
.doc = "Options passed to all plugins" },
307
{ .name = "global-envs", .key = 'e',
308
.arg = "VAR=value",
309
.doc = "Environment variable passed to all plugins" },
310
209
{ .name = "options-for", .key = 'o',
311
210
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
312
211
.doc = "Options passed only to specified plugin" },
313
{ .name = "envs-for", .key = 'f',
314
.arg = "PLUGIN:ENV=value",
315
.doc = "Environment variable passed to specified plugin" },
316
212
{ .name = "disable", .key = 'd',
317
213
.arg = "PLUGIN",
318
214
.doc = "Disable a specific plugin", .group = 1 },
319
215
{ .name = "plugin-dir", .key = 128,
320
216
.arg = "DIRECTORY",
321
217
.doc = "Specify a different plugin directory", .group = 2 },
322
{ .name = "config-file", .key = 129,
323
.arg = "FILE",
324
.doc = "Specify a different configuration file", .group = 2 },
325
{ .name = "userid", .key = 130,
326
.arg = "ID", .flags = 0,
327
.doc = "User ID the plugins will run as", .group = 3 },
328
{ .name = "groupid", .key = 131,
329
.arg = "ID", .flags = 0,
330
.doc = "Group ID the plugins will run as", .group = 3 },
331
{ .name = "debug", .key = 132,
332
.doc = "Debug mode", .group = 4 },
218
{ .name = "userid", .key = 129,
219
.arg = "ID", .flags = 0,
220
.doc = "User ID the plugins will run as", .group = 2 },
221
{ .name = "groupid", .key = 130,
222
.arg = "ID", .flags = 0,
223
.doc = "Group ID the plugins will run as", .group = 2 },
224
{ .name = "debug", .key = 131,
225
.doc = "Debug mode", .group = 3 },
333
226
{ .name = NULL }
334
227
};
335
228
340
233
switch (key) {
341
234
case 'g':
342
235
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
}
236
char *p = strtok(arg, ",");
237
do{
238
addargument(getplugin(NULL, plugins), p);
239
p = strtok(NULL, ",");
240
} while (p != NULL);
367
241
}
368
242
break;
369
243
case 'o':
370
244
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");
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);
409
253
}
410
254
}
411
255
break;
412
256
case 'd':
413
257
if (arg != NULL){
414
plugin *p = getplugin(arg, plugins);
415
if(p == NULL){
416
return ARGP_ERR_UNKNOWN;
417
}
418
p->disabled = true;
258
getplugin(arg, plugins)->disabled = true;
419
259
}
420
260
break;
421
261
case 128:
422
plugindir = strdup(arg);
423
if(plugindir == NULL){
424
perror("strdup");
425
}
262
plugindir = arg;
426
263
break;
427
264
case 129:
428
argfile = strdup(arg);
429
if(argfile == NULL){
430
perror("strdup");
431
}
432
break;
265
uid = (uid_t)strtol(arg, NULL, 10);
266
break;
433
267
case 130:
434
uid = (uid_t)strtol(arg, NULL, 10);
268
gid = (gid_t)strtol(arg, NULL, 10);
435
269
break;
436
270
case 131:
437
gid = (gid_t)strtol(arg, NULL, 10);
438
break;
439
case 132:
440
271
debug = true;
441
272
break;
442
273
case ARGP_KEY_ARG:
443
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;
444
278
break;
445
279
case ARGP_KEY_END:
446
280
break;
458
292
459
293
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
460
294
if (ret == ARGP_ERR_UNKNOWN){
461
fprintf(stderr, "Unknown error while parsing arguments\n");
295
fprintf(stderr, "Unkown error while parsing arguments\n");
462
296
exitstatus = EXIT_FAILURE;
463
goto fallback;
464
}
465
466
if (argfile == NULL){
467
conffp = fopen(AFILE, "r");
468
} else {
469
conffp = fopen(argfile, "r");
297
goto end;
470
298
}
471
299
472
if(conffp != NULL){
473
char *org_line = NULL;
474
char *p, *arg, *new_arg, *line;
475
size_t size = 0;
476
ssize_t sret;
477
const char whitespace_delims[] = " \r\t\f\v\n";
478
const char comment_delim[] = "#";
479
480
custom_argc = 1;
481
custom_argv = malloc(sizeof(char*) * 2);
482
if(custom_argv == NULL){
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){
483
310
perror("malloc");
484
311
exitstatus = EXIT_FAILURE;
485
goto fallback;
486
}
487
custom_argv[0] = argv[0];
488
custom_argv[1] = NULL;
489
490
while(true){
491
sret = getline(&org_line, &size, conffp);
492
if(sret == -1){
493
break;
494
}
495
496
line = org_line;
497
arg = strsep(&line, comment_delim);
498
while((p = strsep(&arg, whitespace_delims)) != NULL){
499
if(p[0] == '\0'){
500
continue;
501
}
502
new_arg = strdup(p);
503
if(new_arg == NULL){
504
perror("strdup");
505
exitstatus = EXIT_FAILURE;
506
free(org_line);
507
goto fallback;
508
}
509
510
custom_argc += 1;
511
custom_argv = realloc(custom_argv, sizeof(char *)
512
* ((unsigned int) custom_argc + 1));
513
if(custom_argv == NULL){
514
perror("realloc");
515
exitstatus = EXIT_FAILURE;
516
free(org_line);
517
goto fallback;
518
}
519
custom_argv[custom_argc-1] = new_arg;
520
custom_argv[custom_argc] = NULL;
521
}
522
}
523
free(org_line);
524
} else{
525
/* Check for harmful errors and go to fallback. Other errors might
526
not affect opening plugins */
527
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
528
perror("fopen");
529
exitstatus = EXIT_FAILURE;
530
goto fallback;
531
}
532
}
533
534
if(custom_argv != NULL){
535
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &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);
536
331
if (ret == ARGP_ERR_UNKNOWN){
537
fprintf(stderr, "Unknown error while parsing arguments\n");
332
fprintf(stderr, "Unkown error while parsing arguments\n");
538
333
exitstatus = EXIT_FAILURE;
539
goto fallback;
334
goto end;
540
335
}
541
336
}
542
337
547
342
for(char **a = p->argv; *a != NULL; a++){
548
343
fprintf(stderr, "\tArg: %s\n", *a);
549
344
}
550
fprintf(stderr, "...and %u environment variables\n", p->envc);
551
for(char **a = p->environ; *a != NULL; a++){
552
fprintf(stderr, "\t%s\n", *a);
553
}
554
345
}
555
346
}
556
347
563
354
if (ret == -1){
564
355
perror("setgid");
565
356
}
566
567
if (plugindir == NULL){
568
dir = opendir(PDIR);
569
} else {
570
dir = opendir(plugindir);
571
}
572
357
358
dir = opendir(plugindir);
573
359
if(dir == NULL){
574
360
perror("Could not open plugin dir");
575
361
exitstatus = EXIT_FAILURE;
576
goto fallback;
362
goto end;
577
363
}
578
364
579
365
/* Set the FD_CLOEXEC flag on the directory, if possible */
584
370
if(ret < 0){
585
371
perror("set_cloexec_flag");
586
372
exitstatus = EXIT_FAILURE;
587
goto fallback;
373
goto end;
588
374
}
589
375
}
590
376
}
599
385
if (errno == EBADF){
600
386
perror("readdir");
601
387
exitstatus = EXIT_FAILURE;
602
goto fallback;
388
goto end;
603
389
}
604
390
break;
605
391
}
650
436
continue;
651
437
}
652
438
}
653
654
char *filename;
655
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
656
if(ret < 0){
657
perror("asprintf");
658
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;
659
445
}
446
strcpy(filename, plugindir); /* Spurious warning */
447
strcat(filename, "/"); /* Spurious warning */
448
strcat(filename, dirst->d_name); /* Spurious warning */
660
449
661
450
ret = stat(filename, &st);
662
451
if (ret == -1){
663
452
perror("stat");
664
free(filename);
665
continue;
453
exitstatus = EXIT_FAILURE;
454
goto end;
666
455
}
667
456
668
457
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
673
462
free(filename);
674
463
continue;
675
464
}
676
plugin *p = getplugin(dirst->d_name, &plugin_list);
677
if(p == NULL){
678
perror("getplugin");
679
free(filename);
680
continue;
681
}
682
if(p->disabled){
465
if(getplugin(dirst->d_name, &plugin_list)->disabled){
683
466
if(debug){
684
467
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
685
468
dirst->d_name);
687
470
free(filename);
688
471
continue;
689
472
}
473
plugin *p = getplugin(dirst->d_name, &plugin_list);
690
474
{
691
475
/* Add global arguments to argument list for this plugin */
692
476
plugin *g = getplugin(NULL, &plugin_list);
693
if(g != NULL){
694
for(char **a = g->argv + 1; *a != NULL; a++){
695
if(not add_argument(p, *a)){
696
perror("add_argument");
697
}
698
}
699
/* Add global environment variables */
700
for(char **e = g->environ; *e != NULL; e++){
701
if(not add_environment(p, *e)){
702
perror("add_environment");
703
}
704
}
705
}
706
}
707
/* If this plugin has any environment variables, we will call
708
using execve and need to duplicate the environment from this
709
process, too. */
710
if(p->environ[0] != NULL){
711
for(char **e = environ; *e != NULL; e++){
712
char *copy = strdup(*e);
713
if(copy == NULL){
714
perror("strdup");
715
continue;
716
}
717
if(not add_environment(p, copy)){
718
perror("add_environment");
719
}
720
}
721
}
722
723
int pipefd[2];
477
for(char **a = g->argv + 1; *a != NULL; a++){
478
addargument(p, *a);
479
}
480
}
481
int pipefd[2];
724
482
ret = pipe(pipefd);
725
483
if (ret == -1){
726
484
perror("pipe");
727
485
exitstatus = EXIT_FAILURE;
728
goto fallback;
486
goto end;
729
487
}
730
488
ret = set_cloexec_flag(pipefd[0]);
731
489
if(ret < 0){
732
490
perror("set_cloexec_flag");
733
491
exitstatus = EXIT_FAILURE;
734
goto fallback;
492
goto end;
735
493
}
736
494
ret = set_cloexec_flag(pipefd[1]);
737
495
if(ret < 0){
738
496
perror("set_cloexec_flag");
739
497
exitstatus = EXIT_FAILURE;
740
goto fallback;
498
goto end;
741
499
}
742
500
/* Block SIGCHLD until process is safely in process list */
743
501
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
744
502
if(ret < 0){
745
503
perror("sigprocmask");
746
504
exitstatus = EXIT_FAILURE;
747
goto fallback;
505
goto end;
748
506
}
749
507
// Starting a new process to be watched
750
508
pid_t pid = fork();
751
if(pid == -1){
752
perror("fork");
753
exitstatus = EXIT_FAILURE;
754
goto fallback;
755
}
756
509
if(pid == 0){
757
510
/* this is the child process */
758
511
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
777
530
above and must now close it manually here. */
778
531
closedir(dir);
779
532
}
780
if(p->environ[0] == NULL){
781
if(execv(filename, p->argv) < 0){
782
perror("execv");
783
_exit(EXIT_FAILURE);
784
}
785
} else {
786
if(execve(filename, p->argv, p->environ) < 0){
787
perror("execve");
788
_exit(EXIT_FAILURE);
789
}
533
if(execv(filename, p->argv) < 0){
534
perror("execv");
535
_exit(EXIT_FAILURE);
790
536
}
791
537
/* no return */
792
538
}
801
547
perror("sigprocmask");
802
548
}
803
549
exitstatus = EXIT_FAILURE;
804
goto fallback;
550
goto end;
805
551
}
806
552
807
553
*new_process = (struct process){ .pid = pid,
815
561
if(ret < 0){
816
562
perror("sigprocmask");
817
563
exitstatus = EXIT_FAILURE;
818
goto fallback;
564
goto end;
819
565
}
820
566
821
567
FD_SET(new_process->fd, &rfds_all);
825
571
}
826
572
827
573
}
828
829
free_plugin_list(plugin_list);
830
plugin_list = NULL;
574
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
}
831
581
832
582
closedir(dir);
833
583
dir = NULL;
834
584
835
585
if (process_list == NULL){
836
fprintf(stderr, "No plugin processes started. Incorrect plugin"
837
" directory?\n");
838
process_list = NULL;
586
fprintf(stderr, "No plugin processes started, exiting\n");
587
exitstatus = EXIT_FAILURE;
588
goto end;
839
589
}
840
590
while(process_list){
841
591
fd_set rfds = rfds_all;
843
593
if (select_ret == -1){
844
594
perror("select");
845
595
exitstatus = EXIT_FAILURE;
846
goto fallback;
596
goto end;
847
597
}
848
598
/* OK, now either a process completed, or something can be read
849
599
from one of them */
856
606
/* Bad exit by plugin */
857
607
if(debug){
858
608
if(WIFEXITED(proc->status)){
859
fprintf(stderr, "Plugin %u exited with status %d\n",
860
(unsigned int) (proc->pid),
861
WEXITSTATUS(proc->status));
609
fprintf(stderr, "Plugin %d exited with status %d\n",
610
proc->pid, WEXITSTATUS(proc->status));
862
611
} else if(WIFSIGNALED(proc->status)) {
863
fprintf(stderr, "Plugin %u killed by signal %d\n",
864
(unsigned int) (proc->pid),
865
WTERMSIG(proc->status));
612
fprintf(stderr, "Plugin %d killed by signal %d\n",
613
proc->pid, WTERMSIG(proc->status));
866
614
} else if(WCOREDUMP(proc->status)){
867
fprintf(stderr, "Plugin %d dumped core\n",
868
(unsigned int) (proc->pid));
615
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
869
616
}
870
617
}
871
618
/* Remove the plugin */
872
619
FD_CLR(proc->fd, &rfds_all);
873
620
/* Block signal while modifying process_list */
874
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
621
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
875
622
if(ret < 0){
876
623
perror("sigprocmask");
877
624
exitstatus = EXIT_FAILURE;
878
goto fallback;
625
goto end;
879
626
}
880
627
/* Delete this process entry from the list */
881
628
if(process_list == proc){
904
651
break;
905
652
}
906
653
/* This process exited nicely, so print its buffer */
907
908
bool bret = print_out_password(proc->buffer,
909
proc->buffer_length);
910
if(not bret){
911
perror("print_out_password");
912
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
}
913
665
}
914
goto fallback;
666
goto end;
915
667
}
916
668
/* This process has not completed. Does it have any output? */
917
669
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
925
677
if (proc->buffer == NULL){
926
678
perror("malloc");
927
679
exitstatus = EXIT_FAILURE;
928
goto fallback;
680
goto end;
929
681
}
930
682
proc->buffer_size += BUFFER_SIZE;
931
683
}
944
696
}
945
697
}
946
698
}
947
948
949
fallback:
950
951
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
952
/* Fallback if all plugins failed, none are found or an error
953
occured */
954
bool bret;
955
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
956
char *passwordbuffer = getpass("Password: ");
957
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
958
if(not bret){
959
perror("print_out_password");
960
exitstatus = EXIT_FAILURE;
961
}
699
if(process_list == NULL){
700
fprintf(stderr, "All plugin processes failed, exiting\n");
701
exitstatus = EXIT_FAILURE;
962
702
}
963
703
704
end:
964
705
/* Restore old signal handler */
965
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
966
if(ret == -1){
967
perror("sigaction");
968
exitstatus = EXIT_FAILURE;
969
}
970
971
if(custom_argv != NULL){
972
for(char **arg = custom_argv+1; *arg != NULL; arg++){
973
free(*arg);
974
}
975
free(custom_argv);
976
}
977
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
}
978
716
979
717
if(dir != NULL){
980
718
closedir(dir);
1000
738
if(errno != ECHILD){
1001
739
perror("wait");
1002
740
}
1003
1004
free(plugindir);
1005
free(argfile);
1006
741
1007
742
return exitstatus;
1008
743
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0