101
108
/* Create a new plugin */
102
109
plugin *new_plugin = malloc(sizeof(plugin));
103
110
if (new_plugin == NULL){
107
new_plugin->name = name;
113
char *copy_name = NULL;
115
copy_name = strdup(name);
116
if(copy_name == NULL){
121
*new_plugin = (plugin) { .name = copy_name,
124
.next = plugin_list };
108
126
new_plugin->argv = malloc(sizeof(char *) * 2);
109
127
if (new_plugin->argv == NULL){
113
new_plugin->argv[0] = name;
132
new_plugin->argv[0] = copy_name;
114
133
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
135
new_plugin->environ = malloc(sizeof(char *));
136
if(new_plugin->environ == NULL){
138
free(new_plugin->argv);
142
new_plugin->environ[0] = NULL;
118
144
/* Append the new plugin to the list */
119
*plugin_list = new_plugin;
145
plugin_list = new_plugin;
120
146
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;
149
/* Helper function for add_argument and add_environment */
150
static bool add_to_char_array(const char *new, char ***array,
152
/* Resize the pointed-to array to hold one more pointer */
153
*array = realloc(*array, sizeof(char *)
154
* (size_t) ((*len) + 2));
159
/* Make a copy of the new string */
160
char *copy = strdup(new);
164
/* Insert the copy */
165
(*array)[*len] = copy;
167
/* Add a new terminating NULL pointer to the last element */
168
(*array)[*len] = NULL;
172
/* Add to a plugin's argument vector */
173
static bool add_argument(plugin *p, const char *arg){
177
return add_to_char_array(arg, &(p->argv), &(p->argc));
180
/* Add to a plugin's environment */
181
static bool add_environment(plugin *p, const char *def, bool replace){
185
/* namelen = length of name of environment variable */
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
187
/* Search for this environment variable */
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
190
/* It already exists */
192
char *new = realloc(*e, strlen(def) + 1);
202
return add_to_char_array(def, &(p->environ), &(p->envc));
221
339
{ .name = "global-options", .key = 'g',
222
340
.arg = "OPTION[,OPTION[,...]]",
223
341
.doc = "Options passed to all plugins" },
342
{ .name = "global-env", .key = 'G',
344
.doc = "Environment variable passed to all plugins" },
224
345
{ .name = "options-for", .key = 'o',
225
346
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
226
347
.doc = "Options passed only to specified plugin" },
348
{ .name = "env-for", .key = 'E',
349
.arg = "PLUGIN:ENV=value",
350
.doc = "Environment variable passed to specified plugin" },
227
351
{ .name = "disable", .key = 'd',
229
353
.doc = "Disable a specific plugin", .group = 1 },
354
{ .name = "enable", .key = 'e',
356
.doc = "Enable a specific plugin", .group = 1 },
230
357
{ .name = "plugin-dir", .key = 128,
231
358
.arg = "DIRECTORY",
232
359
.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 },
360
{ .name = "config-file", .key = 129,
362
.doc = "Specify a different configuration file", .group = 2 },
363
{ .name = "userid", .key = 130,
364
.arg = "ID", .flags = 0,
365
.doc = "User ID the plugins will run as", .group = 3 },
366
{ .name = "groupid", .key = 131,
367
.arg = "ID", .flags = 0,
368
.doc = "Group ID the plugins will run as", .group = 3 },
369
{ .name = "debug", .key = 132,
370
.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;
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
377
case 'g': /* --global-options */
250
378
if (arg != NULL){
252
380
while((p = strsep(&arg, ",")) != NULL){
253
if(strcmp(p, "") == 0){
256
addargument(getplugin(NULL, plugins), p);
384
if(not add_argument(getplugin(NULL), p)){
385
perror("add_argument");
386
return ARGP_ERR_UNKNOWN;
391
case 'G': /* --global-env */
395
if(not add_environment(getplugin(NULL), arg, true)){
396
perror("add_environment");
399
case 'o': /* --options-for */
261
400
if (arg != NULL){
262
char *name = strsep(&arg, ":");
263
if(strcmp(name, "") == 0){
401
char *p_name = strsep(&arg, ":");
402
if(p_name[0] == '\0' or arg == NULL){
266
405
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;
406
if(opt[0] == '\0' or opt == NULL){
410
while((p = strsep(&opt, ",")) != NULL){
414
if(not add_argument(getplugin(p_name), p)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
421
case 'E': /* --env-for */
426
char *envdef = strchr(arg, ':');
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
436
case 'd': /* --disable */
438
plugin *p = getplugin(arg);
440
return ARGP_ERR_UNKNOWN;
445
case 'e': /* --enable */
447
plugin *p = getplugin(arg);
449
return ARGP_ERR_UNKNOWN;
454
case 128: /* --plugin-dir */
456
plugindir = strdup(arg);
457
if(plugindir == NULL){
461
case 129: /* --config-file */
462
/* This is already done by parse_opt_config_file() */
464
case 130: /* --userid */
290
465
uid = (uid_t)strtol(arg, NULL, 10);
467
case 131: /* --groupid */
293
468
gid = (gid_t)strtol(arg, NULL, 10);
470
case 132: /* --debug */
298
473
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]",
474
/* Cryptsetup always passes an argument, which is an empty
475
string if "none" was specified in /etc/crypttab. So if
476
argument was empty, we ignore it silently. */
478
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
484
return ARGP_ERR_UNKNOWN;
489
/* This option parser is the same as parse_opt() above, except it
490
ignores everything but the --config-file option. */
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
495
case 'g': /* --global-options */
496
case 'G': /* --global-env */
497
case 'o': /* --options-for */
498
case 'E': /* --env-for */
499
case 'd': /* --disable */
500
case 'e': /* --enable */
501
case 128: /* --plugin-dir */
503
case 129: /* --config-file */
505
argfile = strdup(arg);
510
case 130: /* --userid */
511
case 131: /* --groupid */
512
case 132: /* --debug */
517
return ARGP_ERR_UNKNOWN;
522
struct argp argp = { .options = options,
523
.parser = parse_opt_config_file,
316
525
.doc = "Mandos plugin runner -- Run plugins" };
318
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
527
/* Parse using the parse_opt_config_file in order to get the custom
528
config file location, if any. */
529
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
319
530
if (ret == ARGP_ERR_UNKNOWN){
320
531
fprintf(stderr, "Unknown error while parsing arguments\n");
321
532
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){
536
/* Reset to the normal argument parser */
537
argp.parser = parse_opt;
539
/* Open the configfile if available */
540
if (argfile == NULL){
541
conffp = fopen(AFILE, "r");
543
conffp = fopen(argfile, "r");
546
char *org_line = NULL;
547
char *p, *arg, *new_arg, *line;
550
const char whitespace_delims[] = " \r\t\f\v\n";
551
const char comment_delim[] = "#";
554
custom_argv = malloc(sizeof(char*) * 2);
555
if(custom_argv == NULL){
335
556
perror("malloc");
336
557
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);
560
custom_argv[0] = argv[0];
561
custom_argv[1] = NULL;
563
/* for each line in the config file, strip whitespace and ignore
566
sret = getline(&org_line, &size, conffp);
572
arg = strsep(&line, comment_delim);
573
while((p = strsep(&arg, whitespace_delims)) != NULL){
580
exitstatus = EXIT_FAILURE;
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
590
exitstatus = EXIT_FAILURE;
594
custom_argv[custom_argc-1] = new_arg;
595
custom_argv[custom_argc] = NULL;
600
/* Check for harmful errors and go to fallback. Other errors might
601
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
exitstatus = EXIT_FAILURE;
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
610
if(custom_argv != NULL){
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
356
613
if (ret == ARGP_ERR_UNKNOWN){
357
614
fprintf(stderr, "Unknown error while parsing arguments\n");
358
615
exitstatus = EXIT_FAILURE;
620
/* Parse actual command line arguments, to let them override the
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
364
630
for(plugin *p = plugin_list; p != NULL; p=p->next){
365
631
fprintf(stderr, "Plugin: %s has %d arguments\n",
559
865
above and must now close it manually here. */
562
if(execv(filename, p->argv) < 0){
868
if(p->environ[0] == NULL){
869
if(execv(filename, p->argv) < 0){
874
if(execve(filename, p->argv, p->environ) < 0){
882
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){
884
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
574
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
576
perror("sigprocmask");
889
perror("sigprocmask");
578
891
exitstatus = EXIT_FAILURE;
582
*new_process = (struct process){ .pid = pid,
584
.next = process_list };
586
process_list = new_process;
895
new_plugin->pid = pid;
896
new_plugin->fd = pipefd[0];
587
898
/* Unblock SIGCHLD so signal handler can be run if this process
588
899
has already completed */
589
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
591
902
perror("sigprocmask");
592
903
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);
907
FD_SET(new_plugin->fd, &rfds_all);
909
if (maxfd < new_plugin->fd){
910
maxfd = new_plugin->fd;
614
if (process_list == NULL){
615
fprintf(stderr, "No plugin processes started. Incorrect plugin"
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
922
fprintf(stderr, "No plugin processes started. Incorrect plugin"
928
/* Main loop while running plugins exist */
620
930
fd_set rfds = rfds_all;
621
931
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
622
932
if (select_ret == -1){
623
933
perror("select");
624
934
exitstatus = EXIT_FAILURE;
627
937
/* OK, now either a process completed, or something can be read
628
938
from one of them */
629
for(process *proc = process_list; proc ; proc = proc->next){
939
for(plugin *proc = plugin_list; proc != NULL;){
630
940
/* Is this process completely done? */
631
941
if(proc->eof and proc->completed){
632
942
/* Only accept the plugin output if it exited cleanly */
633
943
if(not WIFEXITED(proc->status)
634
944
or WEXITSTATUS(proc->status) != 0){
635
945
/* Bad exit by plugin */
637
948
if(WIFEXITED(proc->status)){
638
949
fprintf(stderr, "Plugin %u exited with status %d\n",