101
109
/* Create a new plugin */
102
110
plugin *new_plugin = malloc(sizeof(plugin));
103
111
if (new_plugin == NULL){
107
new_plugin->name = name;
114
char *copy_name = NULL;
116
copy_name = strdup(name);
117
if(copy_name == NULL){
122
*new_plugin = (plugin) { .name = copy_name,
125
.next = plugin_list };
108
127
new_plugin->argv = malloc(sizeof(char *) * 2);
109
128
if (new_plugin->argv == NULL){
113
new_plugin->argv[0] = name;
133
new_plugin->argv[0] = copy_name;
114
134
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
136
new_plugin->environ = malloc(sizeof(char *));
137
if(new_plugin->environ == NULL){
139
free(new_plugin->argv);
143
new_plugin->environ[0] = NULL;
118
145
/* Append the new plugin to the list */
119
*plugin_list = new_plugin;
146
plugin_list = new_plugin;
120
147
return new_plugin;
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){
131
p->argv[p->argc] = NULL;
150
/* Helper function for add_argument and add_environment */
151
static bool add_to_char_array(const char *new, char ***array,
153
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
160
/* Make a copy of the new string */
161
char *copy = strdup(new);
165
/* Insert the copy */
166
(*array)[*len] = copy;
168
/* Add a new terminating NULL pointer to the last element */
169
(*array)[*len] = NULL;
173
/* Add to a plugin's argument vector */
174
static bool add_argument(plugin *p, const char *arg){
178
return add_to_char_array(arg, &(p->argv), &(p->argc));
181
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
186
/* namelen = length of name of environment variable */
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
191
/* It already exists */
193
char *new = realloc(*e, strlen(def) + 1);
203
return add_to_char_array(def, &(p->environ), &(p->envc));
221
341
{ .name = "global-options", .key = 'g',
222
342
.arg = "OPTION[,OPTION[,...]]",
223
343
.doc = "Options passed to all plugins" },
344
{ .name = "global-env", .key = 'G',
346
.doc = "Environment variable passed to all plugins" },
224
347
{ .name = "options-for", .key = 'o',
225
348
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
226
349
.doc = "Options passed only to specified plugin" },
350
{ .name = "env-for", .key = 'E',
351
.arg = "PLUGIN:ENV=value",
352
.doc = "Environment variable passed to specified plugin" },
227
353
{ .name = "disable", .key = 'd',
229
355
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
358
.doc = "Enable a specific plugin", .group = 1 },
230
359
{ .name = "plugin-dir", .key = 128,
231
360
.arg = "DIRECTORY",
232
361
.doc = "Specify a different plugin directory", .group = 2 },
233
{ .name = "userid", .key = 129,
234
.arg = "ID", .flags = 0,
235
.doc = "User ID the plugins will run as", .group = 2 },
236
{ .name = "groupid", .key = 130,
237
.arg = "ID", .flags = 0,
238
.doc = "Group ID the plugins will run as", .group = 2 },
239
{ .name = "debug", .key = 131,
240
.doc = "Debug mode", .group = 3 },
362
{ .name = "config-file", .key = 129,
364
.doc = "Specify a different configuration file", .group = 2 },
365
{ .name = "userid", .key = 130,
366
.arg = "ID", .flags = 0,
367
.doc = "User ID the plugins will run as", .group = 3 },
368
{ .name = "groupid", .key = 131,
369
.arg = "ID", .flags = 0,
370
.doc = "Group ID the plugins will run as", .group = 3 },
371
{ .name = "debug", .key = 132,
372
.doc = "Debug mode", .group = 4 },
244
error_t parse_opt (int key, char *arg, struct argp_state *state) {
245
/* Get the INPUT argument from `argp_parse', which we know is a
246
pointer to our plugin list pointer. */
247
plugin **plugins = state->input;
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
379
case 'g': /* --global-options */
250
380
if (arg != NULL){
252
382
while((p = strsep(&arg, ",")) != NULL){
253
if(strcmp(p, "") == 0){
256
addargument(getplugin(NULL, plugins), p);
386
if(not add_argument(getplugin(NULL), p)){
387
perror("add_argument");
388
return ARGP_ERR_UNKNOWN;
393
case 'G': /* --global-env */
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
401
case 'o': /* --options-for */
261
402
if (arg != NULL){
262
char *name = strsep(&arg, ":");
263
if(strcmp(name, "") == 0){
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0' or arg == NULL){
266
407
char *opt = strsep(&arg, ":");
267
if(strcmp(opt, "") == 0){
272
while((p = strsep(&opt, ",")) != NULL){
273
if(strcmp(p, "") == 0){
276
addargument(getplugin(name, plugins), p);
283
getplugin(arg, plugins)->disabled = true;
408
if(opt[0] == '\0' or opt == NULL){
412
while((p = strsep(&opt, ",")) != NULL){
416
if(not add_argument(getplugin(p_name), p)){
417
perror("add_argument");
418
return ARGP_ERR_UNKNOWN;
423
case 'E': /* --env-for */
428
char *envdef = strchr(arg, ':');
433
if(not add_environment(getplugin(arg), envdef+1, true)){
434
perror("add_environment");
438
case 'd': /* --disable */
440
plugin *p = getplugin(arg);
442
return ARGP_ERR_UNKNOWN;
447
case 'e': /* --enable */
449
plugin *p = getplugin(arg);
451
return ARGP_ERR_UNKNOWN;
456
case 128: /* --plugin-dir */
458
plugindir = strdup(arg);
459
if(plugindir == NULL){
463
case 129: /* --config-file */
464
/* This is already done by parse_opt_config_file() */
466
case 130: /* --userid */
290
467
uid = (uid_t)strtol(arg, NULL, 10);
469
case 131: /* --groupid */
293
470
gid = (gid_t)strtol(arg, NULL, 10);
472
case 132: /* --debug */
298
475
case ARGP_KEY_ARG:
299
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
307
return ARGP_ERR_UNKNOWN;
312
plugin *plugin_list = NULL;
314
struct argp argp = { .options = options, .parser = parse_opt,
315
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
476
/* Cryptsetup always passes an argument, which is an empty
477
string if "none" was specified in /etc/crypttab. So if
478
argument was empty, we ignore it silently. */
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
486
return ARGP_ERR_UNKNOWN;
491
/* This option parser is the same as parse_opt() above, except it
492
ignores everything but the --config-file option. */
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
497
case 'g': /* --global-options */
498
case 'G': /* --global-env */
499
case 'o': /* --options-for */
500
case 'E': /* --env-for */
501
case 'd': /* --disable */
502
case 'e': /* --enable */
503
case 128: /* --plugin-dir */
505
case 129: /* --config-file */
507
argfile = strdup(arg);
512
case 130: /* --userid */
513
case 131: /* --groupid */
514
case 132: /* --debug */
519
return ARGP_ERR_UNKNOWN;
524
struct argp argp = { .options = options,
525
.parser = parse_opt_config_file,
316
527
.doc = "Mandos plugin runner -- Run plugins" };
318
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
529
/* Parse using the parse_opt_config_file in order to get the custom
530
config file location, if any. */
531
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
319
532
if (ret == ARGP_ERR_UNKNOWN){
320
533
fprintf(stderr, "Unknown error while parsing arguments\n");
321
534
exitstatus = EXIT_FAILURE;
326
/* This is a mangled argument in the form of
327
"+--option+--other-option=parameter+--yet-another-option", etc */
328
/* Make new argc and argv vars, and call argp_parse() again. */
329
plus_options++; /* skip the first '+' character */
330
const char delims[] = "+";
333
plus_argv = malloc(sizeof(char*) * 2);
334
if(plus_argv == NULL){
538
/* Reset to the normal argument parser */
539
argp.parser = parse_opt;
541
/* Open the configfile if available */
542
if (argfile == NULL){
543
conffp = fopen(AFILE, "r");
545
conffp = fopen(argfile, "r");
548
char *org_line = NULL;
549
char *p, *arg, *new_arg, *line;
552
const char whitespace_delims[] = " \r\t\f\v\n";
553
const char comment_delim[] = "#";
556
custom_argv = malloc(sizeof(char*) * 2);
557
if(custom_argv == NULL){
335
558
perror("malloc");
336
559
exitstatus = EXIT_FAILURE;
339
plus_argv[0] = argv[0];
342
while((arg = strsep(&plus_options, delims)) != NULL){
344
plus_argv = realloc(plus_argv, sizeof(char *)
345
* ((unsigned int) new_argc + 1));
346
if(plus_argv == NULL){
348
exitstatus = EXIT_FAILURE;
351
plus_argv[new_argc-1] = arg;
352
plus_argv[new_argc] = NULL;
355
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
562
custom_argv[0] = argv[0];
563
custom_argv[1] = NULL;
565
/* for each line in the config file, strip whitespace and ignore
568
sret = getline(&org_line, &size, conffp);
574
arg = strsep(&line, comment_delim);
575
while((p = strsep(&arg, whitespace_delims)) != NULL){
582
exitstatus = EXIT_FAILURE;
588
custom_argv = realloc(custom_argv, sizeof(char *)
589
* ((unsigned int) custom_argc + 1));
590
if(custom_argv == NULL){
592
exitstatus = EXIT_FAILURE;
596
custom_argv[custom_argc-1] = new_arg;
597
custom_argv[custom_argc] = NULL;
602
/* Check for harmful errors and go to fallback. Other errors might
603
not affect opening plugins */
604
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
606
exitstatus = EXIT_FAILURE;
610
/* If there was any arguments from configuration file,
611
pass them to parser as command arguments */
612
if(custom_argv != NULL){
613
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
356
615
if (ret == ARGP_ERR_UNKNOWN){
357
616
fprintf(stderr, "Unknown error while parsing arguments\n");
358
617
exitstatus = EXIT_FAILURE;
622
/* Parse actual command line arguments, to let them override the
624
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
625
if (ret == ARGP_ERR_UNKNOWN){
626
fprintf(stderr, "Unknown error while parsing arguments\n");
627
exitstatus = EXIT_FAILURE;
364
632
for(plugin *p = plugin_list; p != NULL; p=p->next){
365
633
fprintf(stderr, "Plugin: %s has %d arguments\n",
559
866
above and must now close it manually here. */
562
if(execv(filename, p->argv) < 0){
869
if(p->environ[0] == NULL){
870
if(execv(filename, p->argv) < 0){
875
if(execve(filename, p->argv, p->environ) < 0){
883
close(pipefd[1]); /* Close unused write end of pipe */
570
close(pipefd[1]); /* close unused write end of pipe */
571
process *new_process = malloc(sizeof(process));
572
if (new_process == NULL){
885
plugin *new_plugin = getplugin(dirst->d_name);
886
if (new_plugin == NULL){
574
888
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
576
perror("sigprocmask");
890
perror("sigprocmask");
578
892
exitstatus = EXIT_FAILURE;
582
*new_process = (struct process){ .pid = pid,
584
.next = process_list };
586
process_list = new_process;
896
new_plugin->pid = pid;
897
new_plugin->fd = pipefd[0];
587
899
/* Unblock SIGCHLD so signal handler can be run if this process
588
900
has already completed */
589
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
591
903
perror("sigprocmask");
592
904
exitstatus = EXIT_FAILURE;
596
FD_SET(new_process->fd, &rfds_all);
598
if (maxfd < new_process->fd){
599
maxfd = new_process->fd;
604
/* Free the plugin list */
605
for(plugin *next; plugin_list != NULL; plugin_list = next){
606
next = plugin_list->next;
607
free(plugin_list->argv);
908
FD_SET(new_plugin->fd, &rfds_all);
910
if (maxfd < new_plugin->fd){
911
maxfd = new_plugin->fd;
614
if (process_list == NULL){
615
fprintf(stderr, "No plugin processes started. Incorrect plugin"
919
for(plugin *p = plugin_list; p != NULL; p = p->next){
924
fprintf(stderr, "No plugin processes started. Incorrect plugin"
930
/* Main loop while running plugins exist */
620
932
fd_set rfds = rfds_all;
621
933
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
622
934
if (select_ret == -1){
623
935
perror("select");
624
936
exitstatus = EXIT_FAILURE;
627
939
/* OK, now either a process completed, or something can be read
628
940
from one of them */
629
for(process *proc = process_list; proc ; proc = proc->next){
941
for(plugin *proc = plugin_list; proc != NULL;){
630
942
/* Is this process completely done? */
631
943
if(proc->eof and proc->completed){
632
944
/* Only accept the plugin output if it exited cleanly */
633
945
if(not WIFEXITED(proc->status)
634
946
or WEXITSTATUS(proc->status) != 0){
635
947
/* Bad exit by plugin */
637
950
if(WIFEXITED(proc->status)){
638
951
fprintf(stderr, "Plugin %u exited with status %d\n",