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- Committer: Björn Påhlsson
- Date: 2008-08-24 23:13:57 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 102.
- Revision ID: belorn@braxen-20080824231357-e304pw7ls2dnnvw5
* plugin-runner.c (handle_sigchld): Loop until all exited children
have been wait()ed for.
have been wait()ed for.
- files added:
- COPYING
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- plugbasedclient.c => plugin-runner.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- plugins.d/mandosclient.c => plugins.d/password-request.c
- 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
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
27
stderr, STDOUT_FILENO */
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() */
28
42
#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() */
34
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
35
readdir(), closedir() */
36
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
readdir(), closedir(), dirfd() */
37
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
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() */
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() */
48
55
#include <errno.h> /* errno */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
51
argp_parse() */
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
60
#include <signal.h> /* struct sigaction, sigemptyset(),
61
sigaddset(), sigaction(),
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
64
#include <errno.h> /* errno, EBADF */
52
65
53
66
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
69
const char *argp_program_version = "plugin-runner 1.0";
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
54
71
55
72
struct process;
56
73
70
87
char *name; /* can be NULL or any plugin name */
71
88
char **argv;
72
89
int argc;
90
char **environ;
91
int envc;
73
92
bool disabled;
74
93
struct plugin *next;
75
94
} plugin;
84
103
/* Create a new plugin */
85
104
plugin *new_plugin = malloc(sizeof(plugin));
86
105
if (new_plugin == NULL){
87
perror("malloc");
88
exit(EXIT_FAILURE);
89
}
90
new_plugin->name = name;
106
return NULL;
107
}
108
char *copy_name = NULL;
109
if(name != NULL){
110
copy_name = strdup(name);
111
if(copy_name == NULL){
112
return NULL;
113
}
114
}
115
116
*new_plugin = (plugin) { .name = copy_name,
117
.argc = 1,
118
.envc = 0,
119
.disabled = false,
120
.next = *plugin_list };
121
91
122
new_plugin->argv = malloc(sizeof(char *) * 2);
92
123
if (new_plugin->argv == NULL){
93
perror("malloc");
94
exit(EXIT_FAILURE);
124
free(copy_name);
125
free(new_plugin);
126
return NULL;
95
127
}
96
new_plugin->argv[0] = name;
128
new_plugin->argv[0] = copy_name;
97
129
new_plugin->argv[1] = NULL;
98
new_plugin->argc = 1;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
130
131
new_plugin->environ = malloc(sizeof(char *));
132
if(new_plugin->environ == NULL){
133
free(copy_name);
134
free(new_plugin->argv);
135
free(new_plugin);
136
return NULL;
137
}
138
new_plugin->environ[0] = NULL;
101
139
/* Append the new plugin to the list */
102
140
*plugin_list = new_plugin;
103
141
return new_plugin;
104
142
}
105
143
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
}
144
/* Helper function for add_argument and add_environment */
145
static bool add_to_char_array(const char *new, char ***array,
146
int *len){
147
/* Resize the pointed-to array to hold one more pointer */
148
*array = realloc(*array, sizeof(char *)
149
* (size_t) ((*len) + 2));
150
/* Malloc check */
151
if(*array == NULL){
152
return false;
153
}
154
/* Make a copy of the new string */
155
char *copy = strdup(new);
156
if(copy == NULL){
157
return false;
158
}
159
/* Insert the copy */
160
(*array)[*len] = copy;
161
(*len)++;
162
/* Add a new terminating NULL pointer to the last element */
163
(*array)[*len] = NULL;
164
return true;
165
}
166
167
/* Add to a plugin's argument vector */
168
static bool add_argument(plugin *p, const char *arg){
169
if(p == NULL){
170
return false;
171
}
172
return add_to_char_array(arg, &(p->argv), &(p->argc));
173
}
174
175
/* Add to a plugin's environment */
176
static bool add_environment(plugin *p, const char *def){
177
if(p == NULL){
178
return false;
179
}
180
return add_to_char_array(def, &(p->environ), &(p->envc));
181
}
182
116
183
117
184
/*
118
185
* Based on the example in the GNU LibC manual chapter 13.13 "File
130
197
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
131
198
}
132
199
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
136
200
process *process_list = NULL;
137
201
138
/* Mark a process as completed when it exits, and save its exit
202
/* Mark processes as completed when it exits, and save its exit
139
203
status. */
140
204
void handle_sigchld(__attribute__((unused)) int sig){
141
205
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;
206
while(true){
207
int status;
208
pid_t pid = waitpid(-1, &status, WNOHANG);
209
if(pid == 0){
210
break;
211
}
212
if(pid == -1){
213
if (errno != ECHILD){
214
perror("waitpid");
215
}
216
return;
217
}
218
219
while(proc != NULL and proc->pid != pid){
220
proc = proc->next;
221
}
222
if(proc == NULL){
223
/* Process not found in process list */
224
continue;
225
}
226
proc->status = status;
227
proc->completed = true;
228
}
229
}
230
231
bool print_out_password(const char *buffer, size_t length){
232
ssize_t ret;
233
if(length>0 and buffer[length-1] == '\n'){
234
length--;
235
}
236
for(size_t written = 0; written < length; written += (size_t)ret){
237
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
238
length - written));
239
if(ret < 0){
240
return false;
241
}
242
}
243
return true;
244
}
245
246
char **add_to_argv(char **argv, int *argc, char *arg){
247
if (argv == NULL){
248
*argc = 1;
249
argv = malloc(sizeof(char*) * 2);
250
if(argv == NULL){
251
return NULL;
252
}
253
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
254
argv[1] = NULL;
255
}
256
*argc += 1;
257
argv = realloc(argv, sizeof(char *)
258
* ((unsigned int) *argc + 1));
259
if(argv == NULL){
260
return NULL;
261
}
262
argv[*argc-1] = arg;
263
argv[*argc] = NULL;
264
return argv;
265
}
266
267
static void free_plugin_list(plugin *plugin_list){
268
for(plugin *next; plugin_list != NULL; plugin_list = next){
269
next = plugin_list->next;
270
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
271
free(*arg);
272
}
273
free(plugin_list->argv);
274
for(char **env = plugin_list->environ; *env != NULL; env++){
275
free(*env);
276
}
277
free(plugin_list->environ);
278
free(plugin_list);
279
}
153
280
}
154
281
155
282
int main(int argc, char *argv[]){
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
283
const char *plugindir = "/lib/mandos/plugins.d";
284
const char *argfile = ARGFILE;
285
FILE *conffp;
157
286
size_t d_name_len;
158
287
DIR *dir = NULL;
159
288
struct dirent *dirst;
167
296
struct sigaction old_sigchld_action;
168
297
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
169
298
.sa_flags = SA_NOCLDSTOP };
170
char *plus_options = NULL;
171
char **plus_argv = NULL;
299
char **custom_argv = NULL;
300
int custom_argc = 0;
172
301
173
302
/* Establish a signal handler */
174
303
sigemptyset(&sigchld_action.sa_mask);
175
304
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
176
if(ret < 0){
305
if(ret == -1){
177
306
perror("sigaddset");
178
exit(EXIT_FAILURE);
307
exitstatus = EXIT_FAILURE;
308
goto fallback;
179
309
}
180
310
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
181
if(ret < 0){
311
if(ret == -1){
182
312
perror("sigaction");
183
exit(EXIT_FAILURE);
313
exitstatus = EXIT_FAILURE;
314
goto fallback;
184
315
}
185
316
186
317
/* The options we understand. */
188
319
{ .name = "global-options", .key = 'g',
189
320
.arg = "OPTION[,OPTION[,...]]",
190
321
.doc = "Options passed to all plugins" },
322
{ .name = "global-envs", .key = 'e',
323
.arg = "VAR=value",
324
.doc = "Environment variable passed to all plugins" },
191
325
{ .name = "options-for", .key = 'o',
192
326
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
193
327
.doc = "Options passed only to specified plugin" },
328
{ .name = "envs-for", .key = 'f',
329
.arg = "PLUGIN:ENV=value",
330
.doc = "Environment variable passed to specified plugin" },
194
331
{ .name = "disable", .key = 'd',
195
332
.arg = "PLUGIN",
196
333
.doc = "Disable a specific plugin", .group = 1 },
215
352
switch (key) {
216
353
case 'g':
217
354
if (arg != NULL){
218
char *p = strtok(arg, ",");
219
do{
220
addargument(getplugin(NULL, plugins), p);
221
p = strtok(NULL, ",");
222
} while (p != NULL);
355
char *p;
356
while((p = strsep(&arg, ",")) != NULL){
357
if(p[0] == '\0'){
358
continue;
359
}
360
if(not add_argument(getplugin(NULL, plugins), p)){
361
perror("add_argument");
362
return ARGP_ERR_UNKNOWN;
363
}
364
}
365
}
366
break;
367
case 'e':
368
if(arg == NULL){
369
break;
370
}
371
{
372
char *envdef = strdup(arg);
373
if(envdef == NULL){
374
break;
375
}
376
if(not add_environment(getplugin(NULL, plugins), envdef)){
377
perror("add_environment");
378
}
223
379
}
224
380
break;
225
381
case 'o':
226
382
if (arg != NULL){
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);
383
char *p_name = strsep(&arg, ":");
384
if(p_name[0] == '\0'){
385
break;
386
}
387
char *opt = strsep(&arg, ":");
388
if(opt[0] == '\0'){
389
break;
390
}
391
if(opt != NULL){
392
char *p;
393
while((p = strsep(&opt, ",")) != NULL){
394
if(p[0] == '\0'){
395
continue;
396
}
397
if(not add_argument(getplugin(p_name, plugins), p)){
398
perror("add_argument");
399
return ARGP_ERR_UNKNOWN;
400
}
401
}
402
}
403
}
404
break;
405
case 'f':
406
if(arg == NULL){
407
break;
408
}
409
{
410
char *envdef = strchr(arg, ':');
411
if(envdef == NULL){
412
break;
413
}
414
char *p_name = strndup(arg, (size_t) (envdef-arg));
415
if(p_name == NULL){
416
break;
417
}
418
envdef++;
419
if(not add_environment(getplugin(p_name, plugins), envdef)){
420
perror("add_environment");
235
421
}
236
422
}
237
423
break;
238
424
case 'd':
239
425
if (arg != NULL){
240
getplugin(arg, plugins)->disabled = true;
426
plugin *p = getplugin(arg, plugins);
427
if(p == NULL){
428
return ARGP_ERR_UNKNOWN;
429
}
430
p->disabled = true;
241
431
}
242
432
break;
243
433
case 128:
253
443
debug = true;
254
444
break;
255
445
case ARGP_KEY_ARG:
256
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
257
argp_usage (state);
258
}
259
plus_options = arg;
446
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
260
447
break;
261
448
case ARGP_KEY_END:
262
449
break;
272
459
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
273
460
.doc = "Mandos plugin runner -- Run plugins" };
274
461
275
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
276
277
if(plus_options){
278
/* This is a mangled argument in the form of
279
"+--option+--other-option=parameter+--yet-another-option", etc */
280
/* Make new argc and argv vars, and call argp_parse() again. */
281
plus_options++; /* skip the first '+' character */
282
const char delims[] = "+";
283
char *arg;
284
int new_argc = 1;
285
plus_argv = malloc(sizeof(char*) * 2);
286
if(plus_argv == NULL){
287
perror("malloc");
288
exitstatus = EXIT_FAILURE;
289
goto end;
290
}
291
plus_argv[0] = argv[0];
292
plus_argv[1] = NULL;
293
arg = strtok(plus_options, delims); /* Get first argument */
294
while(arg != NULL){
295
new_argc++;
296
plus_argv = realloc(plus_argv, sizeof(char *)
297
* ((unsigned int) new_argc + 1));
298
if(plus_argv == NULL){
299
perror("malloc");
300
exitstatus = EXIT_FAILURE;
301
goto end;
302
}
303
plus_argv[new_argc-1] = arg;
304
plus_argv[new_argc] = NULL;
305
arg = strtok(NULL, delims); /* Get next argument */
306
}
307
argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
462
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
463
if (ret == ARGP_ERR_UNKNOWN){
464
fprintf(stderr, "Unknown error while parsing arguments\n");
465
exitstatus = EXIT_FAILURE;
466
goto fallback;
467
}
468
469
conffp = fopen(argfile, "r");
470
if(conffp != NULL){
471
char *org_line = NULL;
472
char *p, *arg, *new_arg, *line;
473
size_t size = 0;
474
ssize_t sret;
475
const char whitespace_delims[] = " \r\t\f\v\n";
476
const char comment_delim[] = "#";
477
478
while(true){
479
sret = getline(&org_line, &size, conffp);
480
if(sret == -1){
481
break;
482
}
483
484
line = org_line;
485
arg = strsep(&line, comment_delim);
486
while((p = strsep(&arg, whitespace_delims)) != NULL){
487
if(p[0] == '\0'){
488
continue;
489
}
490
new_arg = strdup(p);
491
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
492
if (custom_argv == NULL){
493
perror("add_to_argv");
494
exitstatus = EXIT_FAILURE;
495
goto fallback;
496
}
497
}
498
}
499
free(org_line);
500
} else{
501
/* Check for harmful errors and go to fallback. Other errors might
502
not affect opening plugins */
503
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
504
perror("fopen");
505
exitstatus = EXIT_FAILURE;
506
goto fallback;
507
}
508
}
509
510
if(custom_argv != NULL){
511
custom_argv[0] = argv[0];
512
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
513
if (ret == ARGP_ERR_UNKNOWN){
514
fprintf(stderr, "Unknown error while parsing arguments\n");
515
exitstatus = EXIT_FAILURE;
516
goto fallback;
517
}
308
518
}
309
519
310
520
if(debug){
314
524
for(char **a = p->argv; *a != NULL; a++){
315
525
fprintf(stderr, "\tArg: %s\n", *a);
316
526
}
527
fprintf(stderr, "...and %u environment variables\n", p->envc);
528
for(char **a = p->environ; *a != NULL; a++){
529
fprintf(stderr, "\t%s\n", *a);
530
}
317
531
}
318
532
}
319
533
331
545
if(dir == NULL){
332
546
perror("Could not open plugin dir");
333
547
exitstatus = EXIT_FAILURE;
334
goto end;
548
goto fallback;
335
549
}
336
550
337
551
/* Set the FD_CLOEXEC flag on the directory, if possible */
342
556
if(ret < 0){
343
557
perror("set_cloexec_flag");
344
558
exitstatus = EXIT_FAILURE;
345
goto end;
559
goto fallback;
346
560
}
347
561
}
348
562
}
354
568
355
569
// All directory entries have been processed
356
570
if(dirst == NULL){
571
if (errno == EBADF){
572
perror("readdir");
573
exitstatus = EXIT_FAILURE;
574
goto fallback;
575
}
357
576
break;
358
577
}
359
578
403
622
continue;
404
623
}
405
624
}
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);
625
626
char *filename;
627
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
628
if(ret < 0){
629
perror("asprintf");
630
continue;
631
}
632
633
ret = stat(filename, &st);
634
if (ret == -1){
635
perror("stat");
636
free(filename);
637
continue;
638
}
418
639
419
640
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
420
641
if(debug){
424
645
free(filename);
425
646
continue;
426
647
}
427
if(getplugin(dirst->d_name, &plugin_list)->disabled){
648
plugin *p = getplugin(dirst->d_name, &plugin_list);
649
if(p == NULL){
650
perror("getplugin");
651
free(filename);
652
continue;
653
}
654
if(p->disabled){
428
655
if(debug){
429
656
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
430
657
dirst->d_name);
432
659
free(filename);
433
660
continue;
434
661
}
435
plugin *p = getplugin(dirst->d_name, &plugin_list);
436
662
{
437
663
/* Add global arguments to argument list for this plugin */
438
664
plugin *g = getplugin(NULL, &plugin_list);
439
for(char **a = g->argv + 1; *a != NULL; a++){
440
addargument(p, *a);
441
}
442
}
443
int pipefd[2];
665
if(g != NULL){
666
for(char **a = g->argv + 1; *a != NULL; a++){
667
if(not add_argument(p, *a)){
668
perror("add_argument");
669
}
670
}
671
/* Add global environment variables */
672
for(char **e = g->environ; *e != NULL; e++){
673
if(not add_environment(p, *e)){
674
perror("add_environment");
675
}
676
}
677
}
678
}
679
/* If this plugin has any environment variables, we will call
680
using execve and need to duplicate the environment from this
681
process, too. */
682
if(p->environ[0] != NULL){
683
for(char **e = environ; *e != NULL; e++){
684
char *copy = strdup(*e);
685
if(copy == NULL){
686
perror("strdup");
687
continue;
688
}
689
if(not add_environment(p, copy)){
690
perror("add_environment");
691
}
692
}
693
}
694
695
int pipefd[2];
444
696
ret = pipe(pipefd);
445
697
if (ret == -1){
446
698
perror("pipe");
447
699
exitstatus = EXIT_FAILURE;
448
goto end;
700
goto fallback;
449
701
}
450
702
ret = set_cloexec_flag(pipefd[0]);
451
703
if(ret < 0){
452
704
perror("set_cloexec_flag");
453
705
exitstatus = EXIT_FAILURE;
454
goto end;
706
goto fallback;
455
707
}
456
708
ret = set_cloexec_flag(pipefd[1]);
457
709
if(ret < 0){
458
710
perror("set_cloexec_flag");
459
711
exitstatus = EXIT_FAILURE;
460
goto end;
712
goto fallback;
461
713
}
462
714
/* Block SIGCHLD until process is safely in process list */
463
715
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
464
716
if(ret < 0){
465
717
perror("sigprocmask");
466
718
exitstatus = EXIT_FAILURE;
467
goto end;
719
goto fallback;
468
720
}
469
721
// Starting a new process to be watched
470
722
pid_t pid = fork();
723
if(pid == -1){
724
perror("fork");
725
exitstatus = EXIT_FAILURE;
726
goto fallback;
727
}
471
728
if(pid == 0){
472
729
/* this is the child process */
473
730
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
480
737
perror("sigprocmask");
481
738
_exit(EXIT_FAILURE);
482
739
}
483
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
740
741
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
742
if(ret == -1){
743
perror("dup2");
744
_exit(EXIT_FAILURE);
745
}
484
746
485
747
if(dirfd(dir) < 0){
486
748
/* If dir has no file descriptor, we could not set FD_CLOEXEC
487
749
above and must now close it manually here. */
488
750
closedir(dir);
489
751
}
490
if(execv(filename, p->argv) < 0){
491
perror("execv");
492
_exit(EXIT_FAILURE);
752
if(p->environ[0] == NULL){
753
if(execv(filename, p->argv) < 0){
754
perror("execv");
755
_exit(EXIT_FAILURE);
756
}
757
} else {
758
if(execve(filename, p->argv, p->environ) < 0){
759
perror("execve");
760
_exit(EXIT_FAILURE);
761
}
493
762
}
494
763
/* no return */
495
764
}
504
773
perror("sigprocmask");
505
774
}
506
775
exitstatus = EXIT_FAILURE;
507
goto end;
776
goto fallback;
508
777
}
509
778
510
779
*new_process = (struct process){ .pid = pid,
518
787
if(ret < 0){
519
788
perror("sigprocmask");
520
789
exitstatus = EXIT_FAILURE;
521
goto end;
790
goto fallback;
522
791
}
523
792
524
793
FD_SET(new_process->fd, &rfds_all);
529
798
530
799
}
531
800
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
free_plugin_list(plugin_list);
802
plugin_list = NULL;
538
803
539
804
closedir(dir);
540
805
dir = NULL;
541
806
542
807
if (process_list == NULL){
543
fprintf(stderr, "No plugin processes started, exiting\n");
544
exitstatus = EXIT_FAILURE;
545
goto end;
808
fprintf(stderr, "No plugin processes started. Incorrect plugin"
809
" directory?\n");
810
process_list = NULL;
546
811
}
547
812
while(process_list){
548
813
fd_set rfds = rfds_all;
550
815
if (select_ret == -1){
551
816
perror("select");
552
817
exitstatus = EXIT_FAILURE;
553
goto end;
818
goto fallback;
554
819
}
555
820
/* OK, now either a process completed, or something can be read
556
821
from one of them */
563
828
/* Bad exit by plugin */
564
829
if(debug){
565
830
if(WIFEXITED(proc->status)){
566
fprintf(stderr, "Plugin %d exited with status %d\n",
567
proc->pid, WEXITSTATUS(proc->status));
831
fprintf(stderr, "Plugin %u exited with status %d\n",
832
(unsigned int) (proc->pid),
833
WEXITSTATUS(proc->status));
568
834
} else if(WIFSIGNALED(proc->status)) {
569
fprintf(stderr, "Plugin %d killed by signal %d\n",
570
proc->pid, WTERMSIG(proc->status));
835
fprintf(stderr, "Plugin %u killed by signal %d\n",
836
(unsigned int) (proc->pid),
837
WTERMSIG(proc->status));
571
838
} else if(WCOREDUMP(proc->status)){
572
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
839
fprintf(stderr, "Plugin %d dumped core\n",
840
(unsigned int) (proc->pid));
573
841
}
574
842
}
575
843
/* Remove the plugin */
579
847
if(ret < 0){
580
848
perror("sigprocmask");
581
849
exitstatus = EXIT_FAILURE;
582
goto end;
850
goto fallback;
583
851
}
584
852
/* Delete this process entry from the list */
585
853
if(process_list == proc){
608
876
break;
609
877
}
610
878
/* This process exited nicely, so print its buffer */
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
}
879
880
bool bret = print_out_password(proc->buffer, proc->buffer_length);
881
if(not bret){
882
perror("print_out_password");
883
exitstatus = EXIT_FAILURE;
622
884
}
623
goto end;
885
goto fallback;
624
886
}
625
887
/* This process has not completed. Does it have any output? */
626
888
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
634
896
if (proc->buffer == NULL){
635
897
perror("malloc");
636
898
exitstatus = EXIT_FAILURE;
637
goto end;
899
goto fallback;
638
900
}
639
901
proc->buffer_size += BUFFER_SIZE;
640
902
}
653
915
}
654
916
}
655
917
}
656
if(process_list == NULL){
657
fprintf(stderr, "All plugin processes failed, exiting\n");
658
exitstatus = EXIT_FAILURE;
918
919
920
fallback:
921
922
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
923
/* Fallback if all plugins failed, none are found or an error 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
}
659
932
}
660
933
661
end:
662
934
/* Restore old signal handler */
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
}
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; *arg != NULL; arg++){
943
free(*arg);
944
}
945
free(custom_argv);
946
}
947
free_plugin_list(plugin_list);
673
948
674
949
if(dir != NULL){
675
950
closedir(dir);
679
954
for(process *next; process_list != NULL; process_list = next){
680
955
next = process_list->next;
681
956
close(process_list->fd);
682
kill(process_list->pid, SIGTERM);
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
}
683
962
free(process_list->buffer);
684
963
free(process_list);
685
964
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0