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- Committer: Björn Påhlsson
- Date: 2008-08-15 20:17:32 UTC
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 77.
- Revision ID: belorn@braxen-20080815201732-b7uux3yqs05b3fy9
Added configuration files support for mandos-client
Removed plus argument support for mandos-client
Removed plus argument support for mandos-client
- 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> /* strsep, 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,
65
65
#include <errno.h> /* errno, EBADF */
66
66
67
67
#define BUFFER_SIZE 256
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";
68
#define CONFFILE "/conf/conf.d/mandos/client.conf"
69
70
const char *argp_program_version = "mandos-client 1.0";
73
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
72
75
struct plugin;
76
77
typedef struct plugin{
78
char *name; /* can be NULL or any plugin name */
79
char **argv;
80
int argc;
81
char **environ;
82
int envc;
83
bool disabled;
84
85
/* Variables used for running processes*/
73
struct process;
74
75
typedef struct process{
86
76
pid_t pid;
87
77
int fd;
88
78
char *buffer;
89
79
size_t buffer_size;
90
80
size_t buffer_length;
91
81
bool eof;
92
volatile bool completed;
93
volatile int status;
82
bool completed;
83
int status;
84
struct process *next;
85
} process;
86
87
typedef struct plugin{
88
char *name; /* can be NULL or any plugin name */
89
char **argv;
90
int argc;
91
bool disabled;
94
92
struct plugin *next;
95
93
} plugin;
96
94
97
static plugin *plugin_list = NULL;
98
99
/* Gets a existing plugin based on name,
100
or if none is found, creates a new one */
101
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
95
static plugin *getplugin(char *name, plugin **plugin_list){
96
for (plugin *p = *plugin_list; p != NULL; p = p->next){
104
97
if ((p->name == name)
105
98
or (p->name and name and (strcmp(p->name, name) == 0))){
106
99
return p;
109
102
/* Create a new plugin */
110
103
plugin *new_plugin = malloc(sizeof(plugin));
111
104
if (new_plugin == NULL){
112
return NULL;
113
}
114
char *copy_name = NULL;
115
if(name != NULL){
116
copy_name = strdup(name);
117
if(copy_name == NULL){
118
return NULL;
119
}
120
}
121
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
126
105
perror("malloc");
106
exit(EXIT_FAILURE);
107
}
108
new_plugin->name = name;
127
109
new_plugin->argv = malloc(sizeof(char *) * 2);
128
110
if (new_plugin->argv == NULL){
129
free(copy_name);
130
free(new_plugin);
131
return NULL;
111
perror("malloc");
112
exit(EXIT_FAILURE);
132
113
}
133
new_plugin->argv[0] = copy_name;
114
new_plugin->argv[0] = name;
134
115
new_plugin->argv[1] = NULL;
135
136
new_plugin->environ = malloc(sizeof(char *));
137
if(new_plugin->environ == NULL){
138
free(copy_name);
139
free(new_plugin->argv);
140
free(new_plugin);
141
return NULL;
142
}
143
new_plugin->environ[0] = NULL;
144
116
new_plugin->argc = 1;
117
new_plugin->disabled = false;
118
new_plugin->next = *plugin_list;
145
119
/* Append the new plugin to the list */
146
plugin_list = new_plugin;
120
*plugin_list = new_plugin;
147
121
return new_plugin;
148
122
}
149
123
150
/* Helper function for add_argument and add_environment */
151
static bool add_to_char_array(const char *new, char ***array,
152
int *len){
153
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
156
/* Malloc check */
157
if(*array == NULL){
158
return false;
159
}
160
/* Make a copy of the new string */
161
char *copy = strdup(new);
162
if(copy == NULL){
163
return false;
164
}
165
/* Insert the copy */
166
(*array)[*len] = copy;
167
(*len)++;
168
/* Add a new terminating NULL pointer to the last element */
169
(*array)[*len] = NULL;
170
return true;
171
}
172
173
/* Add to a plugin's argument vector */
174
static bool add_argument(plugin *p, const char *arg){
175
if(p == NULL){
176
return false;
177
}
178
return add_to_char_array(arg, &(p->argv), &(p->argc));
179
}
180
181
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def){
183
if(p == NULL){
184
return false;
185
}
186
return add_to_char_array(def, &(p->environ), &(p->envc));
124
static void addargument(plugin *p, char *arg){
125
p->argv[p->argc] = arg;
126
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
127
if (p->argv == NULL){
128
perror("malloc");
129
exit(EXIT_FAILURE);
130
}
131
p->argc++;
132
p->argv[p->argc] = NULL;
187
133
}
188
134
189
135
/*
202
148
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
203
149
}
204
150
151
process *process_list = NULL;
205
152
206
/* Mark processes as completed when they exit, and save their exit
153
/* Mark a process as completed when it exits, and save its exit
207
154
status. */
208
155
void handle_sigchld(__attribute__((unused)) int sig){
209
while(true){
210
plugin *proc = plugin_list;
211
int status;
212
pid_t pid = waitpid(-1, &status, WNOHANG);
213
if(pid == 0){
214
/* Only still running child processes */
215
break;
216
}
217
if(pid == -1){
218
if (errno != ECHILD){
219
perror("waitpid");
220
}
221
/* No child processes */
222
break;
223
}
224
225
/* A child exited, find it in process_list */
226
while(proc != NULL and proc->pid != pid){
227
proc = proc->next;
228
}
229
if(proc == NULL){
230
/* Process not found in process list */
231
continue;
232
}
233
proc->status = status;
234
proc->completed = true;
235
}
156
process *proc = process_list;
157
int status;
158
pid_t pid = wait(&status);
159
if(pid == -1){
160
perror("wait");
161
return;
162
}
163
while(proc != NULL and proc->pid != pid){
164
proc = proc->next;
165
}
166
if(proc == NULL){
167
/* Process not found in process list */
168
return;
169
}
170
proc->status = status;
171
proc->completed = true;
236
172
}
237
173
238
/* Prints out a password to stdout */
239
174
bool print_out_password(const char *buffer, size_t length){
240
175
ssize_t ret;
241
176
if(length>0 and buffer[length-1] == '\n'){
251
186
return true;
252
187
}
253
188
254
/* Removes and free a plugin from the plugin list */
255
static void free_plugin(plugin *plugin_node){
256
257
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
258
free(*arg);
259
}
260
free(plugin_node->argv);
261
for(char **env = plugin_node->environ; *env != NULL; env++){
262
free(*env);
263
}
264
free(plugin_node->environ);
265
free(plugin_node->buffer);
189
char ** addcustomargument(char **argv, int *argc, char *arg){
266
190
267
/* Removes the plugin from the singly-linked list */
268
if(plugin_node == plugin_list){
269
/* First one - simple */
270
plugin_list = plugin_list->next;
271
} else {
272
/* Second one or later */
273
for(plugin *p = plugin_list; p != NULL; p = p->next){
274
if(p->next == plugin_node){
275
p->next = plugin_node->next;
276
break;
277
}
191
if (argv == NULL){
192
*argc = 1;
193
argv = malloc(sizeof(char*) * 2);
194
if(argv == NULL){
195
return NULL;
278
196
}
279
}
280
281
free(plugin_node);
282
}
283
284
static void free_plugin_list(void){
285
while(plugin_list != NULL){
286
free_plugin(plugin_list);
287
}
197
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
198
argv[1] = NULL;
199
}
200
*argc += 1;
201
argv = realloc(argv, sizeof(char *)
202
* ((unsigned int) *argc + 1));
203
if(argv == NULL){
204
return NULL;
205
}
206
argv[*argc-1] = arg;
207
argv[*argc] = NULL;
208
return argv;
288
209
}
289
210
290
211
int main(int argc, char *argv[]){
291
char *plugindir = NULL;
292
char *argfile = NULL;
212
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
213
const char *conffile = CONFFILE;
293
214
FILE *conffp;
294
215
size_t d_name_len;
295
216
DIR *dir = NULL;
310
231
/* Establish a signal handler */
311
232
sigemptyset(&sigchld_action.sa_mask);
312
233
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
313
if(ret == -1){
234
if(ret < 0){
314
235
perror("sigaddset");
315
exitstatus = EXIT_FAILURE;
316
goto fallback;
236
exit(EXIT_FAILURE);
317
237
}
318
238
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
319
if(ret == -1){
239
if(ret < 0){
320
240
perror("sigaction");
321
exitstatus = EXIT_FAILURE;
322
goto fallback;
241
exit(EXIT_FAILURE);
323
242
}
324
243
325
244
/* The options we understand. */
327
246
{ .name = "global-options", .key = 'g',
328
247
.arg = "OPTION[,OPTION[,...]]",
329
248
.doc = "Options passed to all plugins" },
330
{ .name = "global-envs", .key = 'e',
331
.arg = "VAR=value",
332
.doc = "Environment variable passed to all plugins" },
333
249
{ .name = "options-for", .key = 'o',
334
250
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
335
251
.doc = "Options passed only to specified plugin" },
336
{ .name = "envs-for", .key = 'f',
337
.arg = "PLUGIN:ENV=value",
338
.doc = "Environment variable passed to specified plugin" },
339
252
{ .name = "disable", .key = 'd',
340
253
.arg = "PLUGIN",
341
254
.doc = "Disable a specific plugin", .group = 1 },
342
255
{ .name = "plugin-dir", .key = 128,
343
256
.arg = "DIRECTORY",
344
257
.doc = "Specify a different plugin directory", .group = 2 },
345
{ .name = "config-file", .key = 129,
346
.arg = "FILE",
347
.doc = "Specify a different configuration file", .group = 2 },
348
{ .name = "userid", .key = 130,
349
.arg = "ID", .flags = 0,
350
.doc = "User ID the plugins will run as", .group = 3 },
351
{ .name = "groupid", .key = 131,
352
.arg = "ID", .flags = 0,
353
.doc = "Group ID the plugins will run as", .group = 3 },
354
{ .name = "debug", .key = 132,
355
.doc = "Debug mode", .group = 4 },
258
{ .name = "userid", .key = 129,
259
.arg = "ID", .flags = 0,
260
.doc = "User ID the plugins will run as", .group = 2 },
261
{ .name = "groupid", .key = 130,
262
.arg = "ID", .flags = 0,
263
.doc = "Group ID the plugins will run as", .group = 2 },
264
{ .name = "debug", .key = 131,
265
.doc = "Debug mode", .group = 3 },
356
266
{ .name = NULL }
357
267
};
358
268
359
error_t parse_opt (int key, char *arg, __attribute__((unused)) struct argp_state *state) {
269
error_t parse_opt (int key, char *arg, struct argp_state *state) {
360
270
/* Get the INPUT argument from `argp_parse', which we know is a
361
271
pointer to our plugin list pointer. */
272
plugin **plugins = state->input;
362
273
switch (key) {
363
case 'g': /* --global-options */
274
case 'g':
364
275
if (arg != NULL){
365
276
char *p;
366
277
while((p = strsep(&arg, ",")) != NULL){
367
278
if(p[0] == '\0'){
368
279
continue;
369
280
}
370
if(not add_argument(getplugin(NULL), p)){
371
perror("add_argument");
372
return ARGP_ERR_UNKNOWN;
373
}
374
}
375
}
376
break;
377
case 'e': /* --global-envs */
378
if(arg == NULL){
379
break;
380
}
381
{
382
char *envdef = strdup(arg);
383
if(envdef == NULL){
384
break;
385
}
386
if(not add_environment(getplugin(NULL), envdef)){
387
perror("add_environment");
388
}
389
}
390
break;
391
case 'o': /* --options-for */
281
addargument(getplugin(NULL, plugins), p);
282
}
283
}
284
break;
285
case 'o':
392
286
if (arg != NULL){
393
char *p_name = strsep(&arg, ":");
394
if(p_name[0] == '\0'){
287
char *name = strsep(&arg, ":");
288
if(name[0] == '\0'){
395
289
break;
396
290
}
397
291
char *opt = strsep(&arg, ":");
404
298
if(p[0] == '\0'){
405
299
continue;
406
300
}
407
if(not add_argument(getplugin(p_name), p)){
408
perror("add_argument");
409
return ARGP_ERR_UNKNOWN;
410
}
301
addargument(getplugin(name, plugins), p);
411
302
}
412
303
}
413
304
}
414
305
break;
415
case 'f': /* --envs-for */
416
if(arg == NULL){
417
break;
418
}
419
{
420
char *envdef = strchr(arg, ':');
421
if(envdef == NULL){
422
break;
423
}
424
char *p_name = strndup(arg, (size_t) (envdef-arg));
425
if(p_name == NULL){
426
break;
427
}
428
envdef++;
429
if(not add_environment(getplugin(p_name), envdef)){
430
perror("add_environment");
431
}
432
}
433
break;
434
case 'd': /* --disable */
306
case 'd':
435
307
if (arg != NULL){
436
plugin *p = getplugin(arg);
437
if(p == NULL){
438
return ARGP_ERR_UNKNOWN;
439
}
440
p->disabled = true;
441
}
442
break;
443
case 128: /* --plugin-dir */
444
plugindir = strdup(arg);
445
if(plugindir == NULL){
446
perror("strdup");
447
}
448
break;
449
case 129: /* --config-file */
450
argfile = strdup(arg);
451
if(argfile == NULL){
452
perror("strdup");
453
}
454
break;
455
case 130: /* --userid */
308
getplugin(arg, plugins)->disabled = true;
309
}
310
break;
311
case 128:
312
plugindir = arg;
313
break;
314
case 129:
456
315
uid = (uid_t)strtol(arg, NULL, 10);
457
316
break;
458
case 131: /* --groupid */
317
case 130:
459
318
gid = (gid_t)strtol(arg, NULL, 10);
460
319
break;
461
case 132: /* --debug */
320
case 131:
462
321
debug = true;
463
322
break;
464
323
case ARGP_KEY_ARG:
465
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
324
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
466
325
break;
467
326
case ARGP_KEY_END:
468
327
break;
472
331
return 0;
473
332
}
474
333
334
plugin *plugin_list = NULL;
335
475
336
struct argp argp = { .options = options, .parser = parse_opt,
476
337
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
477
338
.doc = "Mandos plugin runner -- Run plugins" };
478
339
479
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
340
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
480
341
if (ret == ARGP_ERR_UNKNOWN){
481
342
fprintf(stderr, "Unknown error while parsing arguments\n");
482
343
exitstatus = EXIT_FAILURE;
483
goto fallback;
344
goto end;
484
345
}
485
346
486
/* Opens the configfile if aviable */
487
if (argfile == NULL){
488
conffp = fopen(AFILE, "r");
489
} else {
490
conffp = fopen(argfile, "r");
491
}
347
conffp = fopen(conffile, "r");
492
348
if(conffp != NULL){
493
349
char *org_line = NULL;
494
char *p, *arg, *new_arg, *line;
495
350
size_t size = 0;
496
351
ssize_t sret;
352
char *p, *arg, *new_arg, *line;
497
353
const char whitespace_delims[] = " \r\t\f\v\n";
498
354
const char comment_delim[] = "#";
499
355
500
custom_argc = 1;
501
custom_argv = malloc(sizeof(char*) * 2);
502
if(custom_argv == NULL){
503
perror("malloc");
504
exitstatus = EXIT_FAILURE;
505
goto fallback;
506
}
507
custom_argv[0] = argv[0];
508
custom_argv[1] = NULL;
509
510
/* for each line in the config file, strip whitespace and ignore commented text */
511
356
while(true){
512
357
sret = getline(&org_line, &size, conffp);
513
358
if(sret == -1){
521
366
continue;
522
367
}
523
368
new_arg = strdup(p);
524
if(new_arg == NULL){
525
perror("strdup");
526
exitstatus = EXIT_FAILURE;
527
free(org_line);
528
goto fallback;
529
}
530
531
custom_argc += 1;
532
custom_argv = realloc(custom_argv, sizeof(char *)
533
* ((unsigned int) custom_argc + 1));
534
if(custom_argv == NULL){
535
perror("realloc");
536
exitstatus = EXIT_FAILURE;
537
free(org_line);
538
goto fallback;
539
}
540
custom_argv[custom_argc-1] = new_arg;
541
custom_argv[custom_argc] = NULL;
369
custom_argv = addcustomargument(custom_argv, &custom_argc, new_arg);
370
if (custom_argv == NULL){
371
perror("addcustomargument");
372
exitstatus = EXIT_FAILURE;
373
goto end;
374
}
542
375
}
543
376
}
544
377
free(org_line);
545
378
} else{
546
/* Check for harmful errors and go to fallback. Other errors might
547
not affect opening plugins */
379
/* check for harmfull errors */
548
380
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
549
381
perror("fopen");
550
382
exitstatus = EXIT_FAILURE;
551
goto fallback;
383
goto end;
552
384
}
553
385
}
554
/* If there was any arguments from configuration file,
555
pass them to parser as command arguments */
386
556
387
if(custom_argv != NULL){
557
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
388
custom_argv[0] = argv[0];
389
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
558
390
if (ret == ARGP_ERR_UNKNOWN){
559
391
fprintf(stderr, "Unknown error while parsing arguments\n");
560
392
exitstatus = EXIT_FAILURE;
561
goto fallback;
393
goto end;
562
394
}
563
395
}
564
396
569
401
for(char **a = p->argv; *a != NULL; a++){
570
402
fprintf(stderr, "\tArg: %s\n", *a);
571
403
}
572
fprintf(stderr, "...and %u environment variables\n", p->envc);
573
for(char **a = p->environ; *a != NULL; a++){
574
fprintf(stderr, "\t%s\n", *a);
575
}
576
404
}
577
405
}
578
579
/* Strip permissions down to nobody */
406
580
407
ret = setuid(uid);
581
408
if (ret == -1){
582
409
perror("setuid");
583
}
410
}
411
584
412
setgid(gid);
585
413
if (ret == -1){
586
414
perror("setgid");
587
415
}
588
589
if (plugindir == NULL){
590
dir = opendir(PDIR);
591
} else {
592
dir = opendir(plugindir);
593
}
594
416
417
dir = opendir(plugindir);
595
418
if(dir == NULL){
596
419
perror("Could not open plugin dir");
597
420
exitstatus = EXIT_FAILURE;
598
goto fallback;
421
goto end;
599
422
}
600
423
601
424
/* Set the FD_CLOEXEC flag on the directory, if possible */
606
429
if(ret < 0){
607
430
perror("set_cloexec_flag");
608
431
exitstatus = EXIT_FAILURE;
609
goto fallback;
432
goto end;
610
433
}
611
434
}
612
435
}
613
436
614
437
FD_ZERO(&rfds_all);
615
616
/* Read and execute any executable in the plugin directory*/
438
617
439
while(true){
618
440
dirst = readdir(dir);
619
441
622
444
if (errno == EBADF){
623
445
perror("readdir");
624
446
exitstatus = EXIT_FAILURE;
625
goto fallback;
447
goto end;
626
448
}
627
449
break;
628
450
}
650
472
break;
651
473
}
652
474
}
475
653
476
if(bad_name){
654
477
continue;
655
478
}
479
656
480
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
657
481
size_t suf_len = strlen(*suf);
658
482
if((d_name_len >= suf_len)
671
495
continue;
672
496
}
673
497
}
674
675
char *filename;
676
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
677
if(ret < 0){
678
perror("asprintf");
498
499
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
500
if (filename == NULL){
501
perror("malloc");
679
502
continue;
680
503
}
504
strcpy(filename, plugindir); /* Spurious warning */
505
strcat(filename, "/"); /* Spurious warning */
506
strcat(filename, dirst->d_name); /* Spurious warning */
681
507
682
508
ret = stat(filename, &st);
683
509
if (ret == -1){
685
511
free(filename);
686
512
continue;
687
513
}
688
689
/* Ignore non-executable files */
514
690
515
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
691
516
if(debug){
692
517
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
695
520
free(filename);
696
521
continue;
697
522
}
698
699
plugin *p = getplugin(dirst->d_name);
700
if(p == NULL){
701
perror("getplugin");
702
free(filename);
703
continue;
704
}
705
if(p->disabled){
523
if(getplugin(dirst->d_name, &plugin_list)->disabled){
706
524
if(debug){
707
525
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
708
526
dirst->d_name);
710
528
free(filename);
711
529
continue;
712
530
}
531
plugin *p = getplugin(dirst->d_name, &plugin_list);
713
532
{
714
533
/* Add global arguments to argument list for this plugin */
715
plugin *g = getplugin(NULL);
716
if(g != NULL){
717
for(char **a = g->argv + 1; *a != NULL; a++){
718
if(not add_argument(p, *a)){
719
perror("add_argument");
720
}
721
}
722
/* Add global environment variables */
723
for(char **e = g->environ; *e != NULL; e++){
724
if(not add_environment(p, *e)){
725
perror("add_environment");
726
}
727
}
728
}
729
}
730
/* If this plugin has any environment variables, we will call
731
using execve and need to duplicate the environment from this
732
process, too. */
733
if(p->environ[0] != NULL){
734
for(char **e = environ; *e != NULL; e++){
735
char *copy = strdup(*e);
736
if(copy == NULL){
737
perror("strdup");
738
continue;
739
}
740
if(not add_environment(p, copy)){
741
perror("add_environment");
742
}
743
}
744
}
745
746
int pipefd[2];
534
plugin *g = getplugin(NULL, &plugin_list);
535
for(char **a = g->argv + 1; *a != NULL; a++){
536
addargument(p, *a);
537
}
538
}
539
int pipefd[2];
747
540
ret = pipe(pipefd);
748
541
if (ret == -1){
749
542
perror("pipe");
750
543
exitstatus = EXIT_FAILURE;
751
goto fallback;
544
goto end;
752
545
}
753
/* Ask OS to automatic close the pipe on exec */
754
546
ret = set_cloexec_flag(pipefd[0]);
755
547
if(ret < 0){
756
548
perror("set_cloexec_flag");
757
549
exitstatus = EXIT_FAILURE;
758
goto fallback;
550
goto end;
759
551
}
760
552
ret = set_cloexec_flag(pipefd[1]);
761
553
if(ret < 0){
762
554
perror("set_cloexec_flag");
763
555
exitstatus = EXIT_FAILURE;
764
goto fallback;
556
goto end;
765
557
}
766
558
/* Block SIGCHLD until process is safely in process list */
767
559
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
768
560
if(ret < 0){
769
561
perror("sigprocmask");
770
562
exitstatus = EXIT_FAILURE;
771
goto fallback;
563
goto end;
772
564
}
773
565
// Starting a new process to be watched
774
566
pid_t pid = fork();
775
567
if(pid == -1){
776
568
perror("fork");
777
569
exitstatus = EXIT_FAILURE;
778
goto fallback;
570
goto end;
779
571
}
780
572
if(pid == 0){
781
573
/* this is the child process */
801
593
above and must now close it manually here. */
802
594
closedir(dir);
803
595
}
804
if(p->environ[0] == NULL){
805
if(execv(filename, p->argv) < 0){
806
perror("execv");
807
_exit(EXIT_FAILURE);
808
}
809
} else {
810
if(execve(filename, p->argv, p->environ) < 0){
811
perror("execve");
812
_exit(EXIT_FAILURE);
813
}
596
if(execv(filename, p->argv) < 0){
597
perror("execv");
598
_exit(EXIT_FAILURE);
814
599
}
815
600
/* no return */
816
601
}
817
/* Parent process */
818
close(pipefd[1]); /* Close unused write end of pipe */
602
/* parent process */
819
603
free(filename);
820
plugin *new_plugin = getplugin(dirst->d_name);
821
if (new_plugin == NULL){
822
perror("getplugin");
604
close(pipefd[1]); /* close unused write end of pipe */
605
process *new_process = malloc(sizeof(process));
606
if (new_process == NULL){
607
perror("malloc");
823
608
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
824
609
if(ret < 0){
825
perror("sigprocmask");
610
perror("sigprocmask");
826
611
}
827
612
exitstatus = EXIT_FAILURE;
828
goto fallback;
613
goto end;
829
614
}
830
615
831
new_plugin->pid = pid;
832
new_plugin->fd = pipefd[0];
833
616
*new_process = (struct process){ .pid = pid,
617
.fd = pipefd[0],
618
.next = process_list };
619
// List handling
620
process_list = new_process;
834
621
/* Unblock SIGCHLD so signal handler can be run if this process
835
622
has already completed */
836
623
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
837
624
if(ret < 0){
838
625
perror("sigprocmask");
839
626
exitstatus = EXIT_FAILURE;
840
goto fallback;
841
}
842
843
FD_SET(new_plugin->fd, &rfds_all);
844
845
if (maxfd < new_plugin->fd){
846
maxfd = new_plugin->fd;
847
}
848
627
goto end;
628
}
629
630
FD_SET(new_process->fd, &rfds_all);
631
632
if (maxfd < new_process->fd){
633
maxfd = new_process->fd;
634
}
635
636
}
637
638
/* Free the plugin list */
639
for(plugin *next; plugin_list != NULL; plugin_list = next){
640
next = plugin_list->next;
641
free(plugin_list->argv);
642
free(plugin_list);
849
643
}
850
644
851
645
closedir(dir);
852
646
dir = NULL;
853
854
for(plugin *p = plugin_list; p != NULL; p = p->next){
855
if(p->pid != 0){
856
break;
857
}
858
if(p->next == NULL){
859
fprintf(stderr, "No plugin processes started. Incorrect plugin"
860
" directory?\n");
861
free_plugin_list();
862
}
647
648
if (process_list == NULL){
649
fprintf(stderr, "No plugin processes started. Incorrect plugin"
650
" directory?\n");
651
process_list = NULL;
863
652
}
864
865
/* Main loop while running plugins exist */
866
while(plugin_list){
653
while(process_list){
867
654
fd_set rfds = rfds_all;
868
655
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
869
656
if (select_ret == -1){
870
657
perror("select");
871
658
exitstatus = EXIT_FAILURE;
872
goto fallback;
659
goto end;
873
660
}
874
661
/* OK, now either a process completed, or something can be read
875
662
from one of them */
876
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
663
for(process *proc = process_list; proc ; proc = proc->next){
877
664
/* Is this process completely done? */
878
665
if(proc->eof and proc->completed){
879
666
/* Only accept the plugin output if it exited cleanly */
880
667
if(not WIFEXITED(proc->status)
881
668
or WEXITSTATUS(proc->status) != 0){
882
669
/* Bad exit by plugin */
883
884
670
if(debug){
885
671
if(WIFEXITED(proc->status)){
886
672
fprintf(stderr, "Plugin %u exited with status %d\n",
895
681
(unsigned int) (proc->pid));
896
682
}
897
683
}
898
899
684
/* Remove the plugin */
900
685
FD_CLR(proc->fd, &rfds_all);
901
902
686
/* Block signal while modifying process_list */
903
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
687
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
904
688
if(ret < 0){
905
689
perror("sigprocmask");
906
690
exitstatus = EXIT_FAILURE;
907
goto fallback;
908
}
909
free_plugin(proc);
691
goto end;
692
}
693
/* Delete this process entry from the list */
694
if(process_list == proc){
695
/* First one - simple */
696
process_list = proc->next;
697
} else {
698
/* Second one or later */
699
for(process *p = process_list; p != NULL; p = p->next){
700
if(p->next == proc){
701
p->next = proc->next;
702
break;
703
}
704
}
705
}
910
706
/* We are done modifying process list, so unblock signal */
911
707
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
912
708
NULL);
913
709
if(ret < 0){
914
710
perror("sigprocmask");
915
exitstatus = EXIT_FAILURE;
916
goto fallback;
917
}
918
919
if(plugin_list == NULL){
920
break;
921
}
922
continue;
711
}
712
free(proc->buffer);
713
free(proc);
714
/* We deleted this process from the list, so we can't go
715
proc->next. Therefore, start over from the beginning of
716
the process list */
717
break;
923
718
}
924
925
719
/* This process exited nicely, so print its buffer */
926
720
927
bool bret = print_out_password(proc->buffer,
928
proc->buffer_length);
721
bool bret = print_out_password(proc->buffer, proc->buffer_length);
929
722
if(not bret){
930
723
perror("print_out_password");
931
724
exitstatus = EXIT_FAILURE;
932
725
}
933
goto fallback;
726
goto end;
934
727
}
935
936
728
/* This process has not completed. Does it have any output? */
937
729
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
938
730
/* This process had nothing to say at this time */
945
737
if (proc->buffer == NULL){
946
738
perror("malloc");
947
739
exitstatus = EXIT_FAILURE;
948
goto fallback;
740
goto end;
949
741
}
950
742
proc->buffer_size += BUFFER_SIZE;
951
743
}
966
758
}
967
759
968
760
969
fallback:
761
end:
970
762
971
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
972
/* Fallback if all plugins failed, none are found or an error
973
occured */
763
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
764
/* Fallback if all plugins failed, none are found or an error occured */
974
765
bool bret;
975
766
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
976
767
char *passwordbuffer = getpass("Password: ");
978
769
if(not bret){
979
770
perror("print_out_password");
980
771
exitstatus = EXIT_FAILURE;
772
goto end;
981
773
}
982
774
}
983
775
984
776
/* Restore old signal handler */
985
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
986
if(ret == -1){
987
perror("sigaction");
988
exitstatus = EXIT_FAILURE;
989
}
990
991
if(custom_argv != NULL){
992
for(char **arg = custom_argv+1; *arg != NULL; arg++){
993
free(*arg);
994
}
995
free(custom_argv);
777
sigaction(SIGCHLD, &old_sigchld_action, NULL);
778
779
free(custom_argv);
780
781
/* Free the plugin list */
782
for(plugin *next; plugin_list != NULL; plugin_list = next){
783
next = plugin_list->next;
784
free(plugin_list->argv);
785
free(plugin_list);
996
786
}
997
787
998
788
if(dir != NULL){
1000
790
}
1001
791
1002
792
/* Free the process list and kill the processes */
1003
for(plugin *p = plugin_list; p != NULL; p = p->next){
1004
if(p->pid != 0){
1005
close(p->fd);
1006
ret = kill(p->pid, SIGTERM);
1007
if(ret == -1 and errno != ESRCH){
1008
/* Set-uid proccesses might not get closed */
1009
perror("kill");
1010
}
793
for(process *next; process_list != NULL; process_list = next){
794
next = process_list->next;
795
close(process_list->fd);
796
ret = kill(process_list->pid, SIGTERM);
797
if(ret == -1 and errno != ESRCH){
798
/* set-uid proccesses migth not get closed */
799
perror("kill");
1011
800
}
801
free(process_list->buffer);
802
free(process_list);
1012
803
}
1013
804
1014
805
/* Wait for any remaining child processes to terminate */
1018
809
if(errno != ECHILD){
1019
810
perror("wait");
1020
811
}
1021
1022
free_plugin_list();
1023
1024
free(plugindir);
1025
free(argfile);
1026
812
1027
813
return exitstatus;
1028
814
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0