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- Committer: Teddy Hogeborn
- Date: 2008-08-29 06:38:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20080829063827-hbjl6t92tyjl5305
* mandos-clients.conf.xml (ENTITY TIMESTAMP): New. Automatically
updated by Emacs
time-stamp by using
Emacs local variables.
(/refentry/refentryinfo/date): New; set to "&TIMESTAMP;".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/password-request.xml: - '' -
updated by Emacs
time-stamp by using
Emacs local variables.
(/refentry/refentryinfo/date): New; set to "&TIMESTAMP;".
* 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
}
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
}
171
265
}
172
266
173
267
int main(int argc, char *argv[]){
174
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
268
char *plugindir = NULL;
269
char *argfile = NULL;
270
FILE *conffp;
175
271
size_t d_name_len;
176
272
DIR *dir = NULL;
177
273
struct dirent *dirst;
185
281
struct sigaction old_sigchld_action;
186
282
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
187
283
.sa_flags = SA_NOCLDSTOP };
188
char *plus_options = NULL;
189
char **plus_argv = NULL;
284
char **custom_argv = NULL;
285
int custom_argc = 0;
190
286
191
287
/* Establish a signal handler */
192
288
sigemptyset(&sigchld_action.sa_mask);
193
289
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
194
if(ret < 0){
290
if(ret == -1){
195
291
perror("sigaddset");
196
exit(EXIT_FAILURE);
292
exitstatus = EXIT_FAILURE;
293
goto fallback;
197
294
}
198
295
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
199
if(ret < 0){
296
if(ret == -1){
200
297
perror("sigaction");
201
exit(EXIT_FAILURE);
298
exitstatus = EXIT_FAILURE;
299
goto fallback;
202
300
}
203
301
204
302
/* The options we understand. */
206
304
{ .name = "global-options", .key = 'g',
207
305
.arg = "OPTION[,OPTION[,...]]",
208
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" },
209
310
{ .name = "options-for", .key = 'o',
210
311
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
211
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" },
212
316
{ .name = "disable", .key = 'd',
213
317
.arg = "PLUGIN",
214
318
.doc = "Disable a specific plugin", .group = 1 },
215
319
{ .name = "plugin-dir", .key = 128,
216
320
.arg = "DIRECTORY",
217
321
.doc = "Specify a different plugin directory", .group = 2 },
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 },
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 },
226
333
{ .name = NULL }
227
334
};
228
335
233
340
switch (key) {
234
341
case 'g':
235
342
if (arg != NULL){
236
char *p = strtok(arg, ",");
237
do{
238
addargument(getplugin(NULL, plugins), p);
239
p = strtok(NULL, ",");
240
} 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
}
241
367
}
242
368
break;
243
369
case 'o':
244
370
if (arg != NULL){
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);
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");
253
409
}
254
410
}
255
411
break;
256
412
case 'd':
257
413
if (arg != NULL){
258
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;
259
419
}
260
420
break;
261
421
case 128:
262
plugindir = arg;
422
plugindir = strdup(arg);
423
if(plugindir == NULL){
424
perror("strdup");
425
}
263
426
break;
264
427
case 129:
428
argfile = strdup(arg);
429
if(argfile == NULL){
430
perror("strdup");
431
}
432
break;
433
case 130:
265
434
uid = (uid_t)strtol(arg, NULL, 10);
266
435
break;
267
case 130:
436
case 131:
268
437
gid = (gid_t)strtol(arg, NULL, 10);
269
438
break;
270
case 131:
439
case 132:
271
440
debug = true;
272
441
break;
273
442
case ARGP_KEY_ARG:
274
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
275
argp_usage (state);
276
}
277
plus_options = arg;
443
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
278
444
break;
279
445
case ARGP_KEY_END:
280
446
break;
292
458
293
459
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
294
460
if (ret == ARGP_ERR_UNKNOWN){
295
fprintf(stderr, "Unkown error while parsing arguments\n");
461
fprintf(stderr, "Unknown error while parsing arguments\n");
296
462
exitstatus = EXIT_FAILURE;
297
goto end;
463
goto fallback;
464
}
465
466
if (argfile == NULL){
467
conffp = fopen(AFILE, "r");
468
} else {
469
conffp = fopen(argfile, "r");
298
470
}
299
471
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){
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){
310
483
perror("malloc");
311
484
exitstatus = EXIT_FAILURE;
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);
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);
331
536
if (ret == ARGP_ERR_UNKNOWN){
332
fprintf(stderr, "Unkown error while parsing arguments\n");
537
fprintf(stderr, "Unknown error while parsing arguments\n");
333
538
exitstatus = EXIT_FAILURE;
334
goto end;
539
goto fallback;
335
540
}
336
541
}
337
542
342
547
for(char **a = p->argv; *a != NULL; a++){
343
548
fprintf(stderr, "\tArg: %s\n", *a);
344
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
}
345
554
}
346
555
}
347
556
354
563
if (ret == -1){
355
564
perror("setgid");
356
565
}
566
567
if (plugindir == NULL){
568
dir = opendir(PDIR);
569
} else {
570
dir = opendir(plugindir);
571
}
357
572
358
dir = opendir(plugindir);
359
573
if(dir == NULL){
360
574
perror("Could not open plugin dir");
361
575
exitstatus = EXIT_FAILURE;
362
goto end;
576
goto fallback;
363
577
}
364
578
365
579
/* Set the FD_CLOEXEC flag on the directory, if possible */
370
584
if(ret < 0){
371
585
perror("set_cloexec_flag");
372
586
exitstatus = EXIT_FAILURE;
373
goto end;
587
goto fallback;
374
588
}
375
589
}
376
590
}
385
599
if (errno == EBADF){
386
600
perror("readdir");
387
601
exitstatus = EXIT_FAILURE;
388
goto end;
602
goto fallback;
389
603
}
390
604
break;
391
605
}
436
650
continue;
437
651
}
438
652
}
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;
653
654
char *filename;
655
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
656
if(ret < 0){
657
perror("asprintf");
658
continue;
445
659
}
446
strcpy(filename, plugindir); /* Spurious warning */
447
strcat(filename, "/"); /* Spurious warning */
448
strcat(filename, dirst->d_name); /* Spurious warning */
449
660
450
661
ret = stat(filename, &st);
451
662
if (ret == -1){
452
663
perror("stat");
453
exitstatus = EXIT_FAILURE;
454
goto end;
664
free(filename);
665
continue;
455
666
}
456
667
457
668
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
462
673
free(filename);
463
674
continue;
464
675
}
465
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){
466
683
if(debug){
467
684
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
468
685
dirst->d_name);
470
687
free(filename);
471
688
continue;
472
689
}
473
plugin *p = getplugin(dirst->d_name, &plugin_list);
474
690
{
475
691
/* Add global arguments to argument list for this plugin */
476
692
plugin *g = getplugin(NULL, &plugin_list);
477
for(char **a = g->argv + 1; *a != NULL; a++){
478
addargument(p, *a);
479
}
480
}
481
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];
482
724
ret = pipe(pipefd);
483
725
if (ret == -1){
484
726
perror("pipe");
485
727
exitstatus = EXIT_FAILURE;
486
goto end;
728
goto fallback;
487
729
}
488
730
ret = set_cloexec_flag(pipefd[0]);
489
731
if(ret < 0){
490
732
perror("set_cloexec_flag");
491
733
exitstatus = EXIT_FAILURE;
492
goto end;
734
goto fallback;
493
735
}
494
736
ret = set_cloexec_flag(pipefd[1]);
495
737
if(ret < 0){
496
738
perror("set_cloexec_flag");
497
739
exitstatus = EXIT_FAILURE;
498
goto end;
740
goto fallback;
499
741
}
500
742
/* Block SIGCHLD until process is safely in process list */
501
743
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
502
744
if(ret < 0){
503
745
perror("sigprocmask");
504
746
exitstatus = EXIT_FAILURE;
505
goto end;
747
goto fallback;
506
748
}
507
749
// Starting a new process to be watched
508
750
pid_t pid = fork();
751
if(pid == -1){
752
perror("fork");
753
exitstatus = EXIT_FAILURE;
754
goto fallback;
755
}
509
756
if(pid == 0){
510
757
/* this is the child process */
511
758
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
530
777
above and must now close it manually here. */
531
778
closedir(dir);
532
779
}
533
if(execv(filename, p->argv) < 0){
534
perror("execv");
535
_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
}
536
790
}
537
791
/* no return */
538
792
}
547
801
perror("sigprocmask");
548
802
}
549
803
exitstatus = EXIT_FAILURE;
550
goto end;
804
goto fallback;
551
805
}
552
806
553
807
*new_process = (struct process){ .pid = pid,
561
815
if(ret < 0){
562
816
perror("sigprocmask");
563
817
exitstatus = EXIT_FAILURE;
564
goto end;
818
goto fallback;
565
819
}
566
820
567
821
FD_SET(new_process->fd, &rfds_all);
571
825
}
572
826
573
827
}
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
}
828
829
free_plugin_list(plugin_list);
830
plugin_list = NULL;
581
831
582
832
closedir(dir);
583
833
dir = NULL;
584
834
585
835
if (process_list == NULL){
586
fprintf(stderr, "No plugin processes started, exiting\n");
587
exitstatus = EXIT_FAILURE;
588
goto end;
836
fprintf(stderr, "No plugin processes started. Incorrect plugin"
837
" directory?\n");
838
process_list = NULL;
589
839
}
590
840
while(process_list){
591
841
fd_set rfds = rfds_all;
593
843
if (select_ret == -1){
594
844
perror("select");
595
845
exitstatus = EXIT_FAILURE;
596
goto end;
846
goto fallback;
597
847
}
598
848
/* OK, now either a process completed, or something can be read
599
849
from one of them */
621
871
/* Remove the plugin */
622
872
FD_CLR(proc->fd, &rfds_all);
623
873
/* Block signal while modifying process_list */
624
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
874
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
625
875
if(ret < 0){
626
876
perror("sigprocmask");
627
877
exitstatus = EXIT_FAILURE;
628
goto end;
878
goto fallback;
629
879
}
630
880
/* Delete this process entry from the list */
631
881
if(process_list == proc){
654
904
break;
655
905
}
656
906
/* This process exited nicely, so print its buffer */
657
for(size_t written = 0; written < proc->buffer_length;
658
written += (size_t)ret){
659
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
660
proc->buffer + written,
661
proc->buffer_length
662
- written));
663
if(ret < 0){
664
perror("write");
665
exitstatus = EXIT_FAILURE;
666
goto end;
667
}
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;
668
913
}
669
goto end;
914
goto fallback;
670
915
}
671
916
/* This process has not completed. Does it have any output? */
672
917
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
680
925
if (proc->buffer == NULL){
681
926
perror("malloc");
682
927
exitstatus = EXIT_FAILURE;
683
goto end;
928
goto fallback;
684
929
}
685
930
proc->buffer_size += BUFFER_SIZE;
686
931
}
699
944
}
700
945
}
701
946
}
702
if(process_list == NULL){
703
fprintf(stderr, "All plugin processes failed, exiting\n");
704
exitstatus = EXIT_FAILURE;
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
}
705
962
}
706
963
707
end:
708
964
/* Restore old signal handler */
709
sigaction(SIGCHLD, &old_sigchld_action, NULL);
710
711
free(plus_argv);
712
713
/* Free the plugin list */
714
for(plugin *next; plugin_list != NULL; plugin_list = next){
715
next = plugin_list->next;
716
free(plugin_list->argv);
717
free(plugin_list);
718
}
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);
719
978
720
979
if(dir != NULL){
721
980
closedir(dir);
741
1000
if(errno != ECHILD){
742
1001
perror("wait");
743
1002
}
1003
1004
free(plugindir);
1005
free(argfile);
744
1006
745
1007
return exitstatus;
746
1008
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0