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- Committer: Teddy Hogeborn
- Date: 2008-08-29 07:09:04 UTC
- Revision ID: teddy@fukt.bsnet.se-20080829070904-i6u8xb0aueytvfii
* mandos-clients.conf.xml (/refentry/refentryinfo/title): Changed to
"Mandos
Manual".
(/refentry/refentryinfo/productname): Changed to "Mandos".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/password-request.xml: - '' -
"Mandos
Manual".
(/refentry/refentryinfo/productname): Changed to "Mandos".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/password-request.xml: - '' -
- files added:
- .bzrignore
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
22
*/
23
23
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
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> /* strtok, strlen(), strcpy(),
55
strcat() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
55
#include <errno.h> /* errno */
57
56
#include <argp.h> /* struct argp_option, struct
58
57
argp_state, struct argp,
59
58
argp_parse(), ARGP_ERR_UNKNOWN,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
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
const char *argp_program_version = "mandos-client 1.0";
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";
70
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
74
72
75
struct process;
78
81
size_t buffer_size;
79
82
size_t buffer_length;
80
83
bool eof;
81
bool completed;
82
int status;
84
volatile bool completed;
85
volatile int status;
83
86
struct process *next;
84
87
} process;
85
88
87
90
char *name; /* can be NULL or any plugin name */
88
91
char **argv;
89
92
int argc;
93
char **environ;
94
int envc;
90
95
bool disabled;
91
96
struct plugin *next;
92
97
} plugin;
101
106
/* Create a new plugin */
102
107
plugin *new_plugin = malloc(sizeof(plugin));
103
108
if (new_plugin == NULL){
104
perror("malloc");
105
exit(EXIT_FAILURE);
106
}
107
new_plugin->name = name;
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
108
125
new_plugin->argv = malloc(sizeof(char *) * 2);
109
126
if (new_plugin->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
127
free(copy_name);
128
free(new_plugin);
129
return NULL;
112
130
}
113
new_plugin->argv[0] = name;
131
new_plugin->argv[0] = copy_name;
114
132
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
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;
118
142
/* Append the new plugin to the list */
119
143
*plugin_list = new_plugin;
120
144
return new_plugin;
121
145
}
122
146
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
127
perror("malloc");
128
exit(EXIT_FAILURE);
129
}
130
p->argc++;
131
p->argv[p->argc] = NULL;
132
}
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
133
186
134
187
/*
135
188
* Based on the example in the GNU LibC manual chapter 13.13 "File
149
202
150
203
process *process_list = NULL;
151
204
152
/* Mark a process as completed when it exits, and save its exit
205
/* Mark processes as completed when they exit, and save their exit
153
206
status. */
154
207
void handle_sigchld(__attribute__((unused)) int sig){
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;
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
}
171
235
}
172
236
173
237
bool print_out_password(const char *buffer, size_t length){
174
size_t ret;
175
for(size_t written = 0; written < length; written += ret){
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){
176
243
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
177
244
length - written));
178
245
if(ret < 0){
182
249
return true;
183
250
}
184
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
}
265
}
266
185
267
int main(int argc, char *argv[]){
186
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
268
char *plugindir = NULL;
269
char *argfile = NULL;
270
FILE *conffp;
187
271
size_t d_name_len;
188
272
DIR *dir = NULL;
189
273
struct dirent *dirst;
197
281
struct sigaction old_sigchld_action;
198
282
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
199
283
.sa_flags = SA_NOCLDSTOP };
200
char *plus_options = NULL;
201
char **plus_argv = NULL;
284
char **custom_argv = NULL;
285
int custom_argc = 0;
202
286
203
287
/* Establish a signal handler */
204
288
sigemptyset(&sigchld_action.sa_mask);
205
289
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
206
if(ret < 0){
290
if(ret == -1){
207
291
perror("sigaddset");
208
exit(EXIT_FAILURE);
292
exitstatus = EXIT_FAILURE;
293
goto fallback;
209
294
}
210
295
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
211
if(ret < 0){
296
if(ret == -1){
212
297
perror("sigaction");
213
exit(EXIT_FAILURE);
298
exitstatus = EXIT_FAILURE;
299
goto fallback;
214
300
}
215
301
216
302
/* The options we understand. */
218
304
{ .name = "global-options", .key = 'g',
219
305
.arg = "OPTION[,OPTION[,...]]",
220
306
.doc = "Options passed to all plugins" },
307
{ .name = "global-envs", .key = 'e',
308
.arg = "VAR=value",
309
.doc = "Environment variable passed to all plugins" },
221
310
{ .name = "options-for", .key = 'o',
222
311
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
223
312
.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" },
224
316
{ .name = "disable", .key = 'd',
225
317
.arg = "PLUGIN",
226
318
.doc = "Disable a specific plugin", .group = 1 },
227
319
{ .name = "plugin-dir", .key = 128,
228
320
.arg = "DIRECTORY",
229
321
.doc = "Specify a different plugin directory", .group = 2 },
230
{ .name = "userid", .key = 129,
231
.arg = "ID", .flags = 0,
232
.doc = "User ID the plugins will run as", .group = 2 },
233
{ .name = "groupid", .key = 130,
234
.arg = "ID", .flags = 0,
235
.doc = "Group ID the plugins will run as", .group = 2 },
236
{ .name = "debug", .key = 131,
237
.doc = "Debug mode", .group = 3 },
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 },
238
333
{ .name = NULL }
239
334
};
240
335
245
340
switch (key) {
246
341
case 'g':
247
342
if (arg != NULL){
248
char *p = strtok(arg, ",");
249
do{
250
addargument(getplugin(NULL, plugins), p);
251
p = strtok(NULL, ",");
252
} while (p != 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
}
253
367
}
254
368
break;
255
369
case 'o':
256
370
if (arg != NULL){
257
char *name = strtok(arg, ":");
258
char *p = strtok(NULL, ":");
259
if(p != NULL){
260
p = strtok(p, ",");
261
do{
262
addargument(getplugin(name, plugins), p);
263
p = strtok(NULL, ",");
264
} while (p != 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");
265
409
}
266
410
}
267
411
break;
268
412
case 'd':
269
413
if (arg != NULL){
270
getplugin(arg, plugins)->disabled = true;
414
plugin *p = getplugin(arg, plugins);
415
if(p == NULL){
416
return ARGP_ERR_UNKNOWN;
417
}
418
p->disabled = true;
271
419
}
272
420
break;
273
421
case 128:
274
plugindir = arg;
422
plugindir = strdup(arg);
423
if(plugindir == NULL){
424
perror("strdup");
425
}
275
426
break;
276
427
case 129:
428
argfile = strdup(arg);
429
if(argfile == NULL){
430
perror("strdup");
431
}
432
break;
433
case 130:
277
434
uid = (uid_t)strtol(arg, NULL, 10);
278
435
break;
279
case 130:
436
case 131:
280
437
gid = (gid_t)strtol(arg, NULL, 10);
281
438
break;
282
case 131:
439
case 132:
283
440
debug = true;
284
441
break;
285
442
case ARGP_KEY_ARG:
286
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
287
argp_usage (state);
288
}
289
plus_options = arg;
443
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
290
444
break;
291
445
case ARGP_KEY_END:
292
446
break;
304
458
305
459
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
306
460
if (ret == ARGP_ERR_UNKNOWN){
307
fprintf(stderr, "Unkown error while parsing arguments\n");
461
fprintf(stderr, "Unknown error while parsing arguments\n");
308
462
exitstatus = EXIT_FAILURE;
309
goto end;
463
goto fallback;
464
}
465
466
if (argfile == NULL){
467
conffp = fopen(AFILE, "r");
468
} else {
469
conffp = fopen(argfile, "r");
310
470
}
311
471
312
if(plus_options){
313
/* This is a mangled argument in the form of
314
"+--option+--other-option=parameter+--yet-another-option", etc */
315
/* Make new argc and argv vars, and call argp_parse() again. */
316
plus_options++; /* skip the first '+' character */
317
const char delims[] = "+";
318
char *arg;
319
int new_argc = 1;
320
plus_argv = malloc(sizeof(char*) * 2);
321
if(plus_argv == NULL){
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){
322
483
perror("malloc");
323
484
exitstatus = EXIT_FAILURE;
324
goto end;
325
}
326
plus_argv[0] = argv[0];
327
plus_argv[1] = NULL;
328
arg = strtok(plus_options, delims); /* Get first argument */
329
while(arg != NULL){
330
new_argc++;
331
plus_argv = realloc(plus_argv, sizeof(char *)
332
* ((unsigned int) new_argc + 1));
333
if(plus_argv == NULL){
334
perror("realloc");
335
exitstatus = EXIT_FAILURE;
336
goto end;
337
}
338
plus_argv[new_argc-1] = arg;
339
plus_argv[new_argc] = NULL;
340
arg = strtok(NULL, delims); /* Get next argument */
341
}
342
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
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);
343
536
if (ret == ARGP_ERR_UNKNOWN){
344
fprintf(stderr, "Unkown error while parsing arguments\n");
537
fprintf(stderr, "Unknown error while parsing arguments\n");
345
538
exitstatus = EXIT_FAILURE;
346
goto end;
539
goto fallback;
347
540
}
348
541
}
349
542
354
547
for(char **a = p->argv; *a != NULL; a++){
355
548
fprintf(stderr, "\tArg: %s\n", *a);
356
549
}
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
}
357
554
}
358
555
}
359
556
366
563
if (ret == -1){
367
564
perror("setgid");
368
565
}
566
567
if (plugindir == NULL){
568
dir = opendir(PDIR);
569
} else {
570
dir = opendir(plugindir);
571
}
369
572
370
dir = opendir(plugindir);
371
573
if(dir == NULL){
372
574
perror("Could not open plugin dir");
373
575
exitstatus = EXIT_FAILURE;
374
goto end;
576
goto fallback;
375
577
}
376
578
377
579
/* Set the FD_CLOEXEC flag on the directory, if possible */
382
584
if(ret < 0){
383
585
perror("set_cloexec_flag");
384
586
exitstatus = EXIT_FAILURE;
385
goto end;
587
goto fallback;
386
588
}
387
589
}
388
590
}
397
599
if (errno == EBADF){
398
600
perror("readdir");
399
601
exitstatus = EXIT_FAILURE;
400
goto end;
602
goto fallback;
401
603
}
402
604
break;
403
605
}
448
650
continue;
449
651
}
450
652
}
451
452
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
453
if (filename == NULL){
454
perror("malloc");
455
exitstatus = EXIT_FAILURE;
456
goto end;
653
654
char *filename;
655
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
656
if(ret < 0){
657
perror("asprintf");
658
continue;
457
659
}
458
strcpy(filename, plugindir); /* Spurious warning */
459
strcat(filename, "/"); /* Spurious warning */
460
strcat(filename, dirst->d_name); /* Spurious warning */
461
660
462
661
ret = stat(filename, &st);
463
662
if (ret == -1){
464
663
perror("stat");
465
exitstatus = EXIT_FAILURE;
466
goto end;
664
free(filename);
665
continue;
467
666
}
468
667
469
668
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
474
673
free(filename);
475
674
continue;
476
675
}
477
if(getplugin(dirst->d_name, &plugin_list)->disabled){
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){
478
683
if(debug){
479
684
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
480
685
dirst->d_name);
482
687
free(filename);
483
688
continue;
484
689
}
485
plugin *p = getplugin(dirst->d_name, &plugin_list);
486
690
{
487
691
/* Add global arguments to argument list for this plugin */
488
692
plugin *g = getplugin(NULL, &plugin_list);
489
for(char **a = g->argv + 1; *a != NULL; a++){
490
addargument(p, *a);
491
}
492
}
493
int pipefd[2];
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];
494
724
ret = pipe(pipefd);
495
725
if (ret == -1){
496
726
perror("pipe");
497
727
exitstatus = EXIT_FAILURE;
498
goto end;
728
goto fallback;
499
729
}
500
730
ret = set_cloexec_flag(pipefd[0]);
501
731
if(ret < 0){
502
732
perror("set_cloexec_flag");
503
733
exitstatus = EXIT_FAILURE;
504
goto end;
734
goto fallback;
505
735
}
506
736
ret = set_cloexec_flag(pipefd[1]);
507
737
if(ret < 0){
508
738
perror("set_cloexec_flag");
509
739
exitstatus = EXIT_FAILURE;
510
goto end;
740
goto fallback;
511
741
}
512
742
/* Block SIGCHLD until process is safely in process list */
513
743
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
514
744
if(ret < 0){
515
745
perror("sigprocmask");
516
746
exitstatus = EXIT_FAILURE;
517
goto end;
747
goto fallback;
518
748
}
519
749
// Starting a new process to be watched
520
750
pid_t pid = fork();
751
if(pid == -1){
752
perror("fork");
753
exitstatus = EXIT_FAILURE;
754
goto fallback;
755
}
521
756
if(pid == 0){
522
757
/* this is the child process */
523
758
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
542
777
above and must now close it manually here. */
543
778
closedir(dir);
544
779
}
545
if(execv(filename, p->argv) < 0){
546
perror("execv");
547
_exit(EXIT_FAILURE);
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
}
548
790
}
549
791
/* no return */
550
792
}
559
801
perror("sigprocmask");
560
802
}
561
803
exitstatus = EXIT_FAILURE;
562
goto end;
804
goto fallback;
563
805
}
564
806
565
807
*new_process = (struct process){ .pid = pid,
573
815
if(ret < 0){
574
816
perror("sigprocmask");
575
817
exitstatus = EXIT_FAILURE;
576
goto end;
818
goto fallback;
577
819
}
578
820
579
821
FD_SET(new_process->fd, &rfds_all);
583
825
}
584
826
585
827
}
586
587
/* Free the plugin list */
588
for(plugin *next; plugin_list != NULL; plugin_list = next){
589
next = plugin_list->next;
590
free(plugin_list->argv);
591
free(plugin_list);
592
}
828
829
free_plugin_list(plugin_list);
830
plugin_list = NULL;
593
831
594
832
closedir(dir);
595
833
dir = NULL;
605
843
if (select_ret == -1){
606
844
perror("select");
607
845
exitstatus = EXIT_FAILURE;
608
goto end;
846
goto fallback;
609
847
}
610
848
/* OK, now either a process completed, or something can be read
611
849
from one of them */
633
871
/* Remove the plugin */
634
872
FD_CLR(proc->fd, &rfds_all);
635
873
/* Block signal while modifying process_list */
636
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
874
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
637
875
if(ret < 0){
638
876
perror("sigprocmask");
639
877
exitstatus = EXIT_FAILURE;
640
goto end;
878
goto fallback;
641
879
}
642
880
/* Delete this process entry from the list */
643
881
if(process_list == proc){
667
905
}
668
906
/* This process exited nicely, so print its buffer */
669
907
670
bool bret = print_out_password(proc->buffer, proc->buffer_length);
908
bool bret = print_out_password(proc->buffer,
909
proc->buffer_length);
671
910
if(not bret){
672
911
perror("print_out_password");
673
912
exitstatus = EXIT_FAILURE;
674
913
}
675
goto end;
914
goto fallback;
676
915
}
677
916
/* This process has not completed. Does it have any output? */
678
917
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
686
925
if (proc->buffer == NULL){
687
926
perror("malloc");
688
927
exitstatus = EXIT_FAILURE;
689
goto end;
928
goto fallback;
690
929
}
691
930
proc->buffer_size += BUFFER_SIZE;
692
931
}
705
944
}
706
945
}
707
946
}
947
948
949
fallback:
708
950
709
if(process_list == NULL){
951
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
952
/* Fallback if all plugins failed, none are found or an error
953
occured */
710
954
bool bret;
711
955
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
712
956
char *passwordbuffer = getpass("Password: ");
714
958
if(not bret){
715
959
perror("print_out_password");
716
960
exitstatus = EXIT_FAILURE;
717
goto end;
718
}
719
bret = print_out_password("\n", 1);
720
if(not bret){
721
perror("print_out_password");
722
exitstatus = EXIT_FAILURE;
723
961
}
724
962
}
725
726
end:
727
963
728
964
/* Restore old signal handler */
729
sigaction(SIGCHLD, &old_sigchld_action, NULL);
730
731
free(plus_argv);
732
733
/* Free the plugin list */
734
for(plugin *next; plugin_list != NULL; plugin_list = next){
735
next = plugin_list->next;
736
free(plugin_list->argv);
737
free(plugin_list);
738
}
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);
739
978
740
979
if(dir != NULL){
741
980
closedir(dir);
761
1000
if(errno != ECHILD){
762
1001
perror("wait");
763
1002
}
1003
1004
free(plugindir);
1005
free(argfile);
764
1006
765
1007
return exitstatus;
766
1008
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0