/mandos/release : revision 171

65

#include <errno.h> /* errno, EBADF */

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#define BUFFER_SIZE 256

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#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"

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#define PDIR "/lib/mandos/plugins.d"

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#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"

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const char *argp_program_version = "plugin-runner 1.0";

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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";

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struct process;

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typedef struct process{

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struct plugin;

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typedef struct plugin{

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char *name; /* can be NULL or any plugin name */

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char **argv;

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int argc;

81

char **environ;

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int envc;

83

bool disabled;

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/* Variables used for running processes*/

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pid_t pid;

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int fd;

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char *buffer;

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91

bool eof;

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92

volatile bool completed;

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volatile int status;

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struct process *next;

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} process;

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typedef struct plugin{

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char *name; /* can be NULL or any plugin name */

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char **argv;

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int argc;

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char **environ;

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int envc;

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bool disabled;

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struct plugin *next;

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} plugin;

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static plugin *getplugin(char *name, plugin **plugin_list){

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for (plugin *p = *plugin_list; p != NULL; p = p->next){

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static plugin *plugin_list = NULL;

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/* Gets an existing plugin based on name,

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or if none is found, creates a new one */

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static plugin *getplugin(char *name){

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/* Check for exiting plugin with that name */

103

for (plugin *p = plugin_list; p != NULL; p = p->next){

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if ((p->name == name)

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or (p->name and name and (strcmp(p->name, name) == 0))){

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return p;

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*new_plugin = (plugin) { .name = copy_name,

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.argc = 1,

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.envc = 0,

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.disabled = false,

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.next = *plugin_list };

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.next = plugin_list };

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new_plugin->argv = malloc(sizeof(char *) * 2);

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128

if (new_plugin->argv == NULL){

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132

}

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new_plugin->argv[0] = copy_name;

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new_plugin->argv[1] = NULL;

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135

132

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new_plugin->environ = malloc(sizeof(char *));

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137

if(new_plugin->environ == NULL){

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138

free(copy_name);

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141

return NULL;

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142

}

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143

new_plugin->environ[0] = NULL;

144

140

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/* Append the new plugin to the list */

141

*plugin_list = new_plugin;

146

plugin_list = new_plugin;

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147

return new_plugin;

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148

}

144

149

174

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}

175

180

176

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/* Add to a plugin's environment */

177

static bool add_environment(plugin *p, const char *def){

182

static bool add_environment(plugin *p, const char *def, bool replace){

178

183

if(p == NULL){

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184

return false;

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185

}

186

/* namelen = length of name of environment variable */

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size_t namelen = (size_t)(strchrnul(def, '=') - def);

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/* 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 */

192

if(replace){

193

char *new = realloc(*e, strlen(def) + 1);

194

if(new == NULL){

195

return false;

196

}

197

*e = new;

198

strcpy(*e, def);

199

}

200

return true;

201

}

202

}

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return add_to_char_array(def, &(p->environ), &(p->envc));

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}

183

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184

185

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/*

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* Based on the example in the GNU LibC manual chapter 13.13 "File

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* Descriptor Flags".

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return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);

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220

}

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process *process_list = NULL;

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203

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/* Mark processes as completed when they exit, and save their exit

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status. */

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void handle_sigchld(__attribute__((unused)) int sig){

206

226

while(true){

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process *proc = process_list;

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plugin *proc = plugin_list;

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int status;

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pid_t pid = waitpid(-1, &status, WNOHANG);

210

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if(pid == 0){

218

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/* No child processes */

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break;

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}

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/* A child exited, find it in process_list */

223

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while(proc != NULL and proc->pid != pid){

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proc = proc->next;

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}

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253

}

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255

/* Prints out a password to stdout */

235

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bool print_out_password(const char *buffer, size_t length){

236

257

ssize_t ret;

237

if(length>0 and buffer[length-1] == '\n'){

238

length--;

239

}

240

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for(size_t written = 0; written < length; written += (size_t)ret){

241

259

ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,

242

260

length - written));

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return true;

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}

249

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static void free_plugin_list(plugin *plugin_list){

251

for(plugin *next; plugin_list != NULL; plugin_list = next){

252

next = plugin_list->next;

253

for(char **arg = plugin_list->argv; *arg != NULL; arg++){

254

free(*arg);

255

}

256

free(plugin_list->argv);

257

for(char **env = plugin_list->environ; *env != NULL; env++){

258

free(*env);

259

}

260

free(plugin_list->environ);

261

free(plugin_list);

268

/* Removes and free a plugin from the plugin list */

269

static void free_plugin(plugin *plugin_node){

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for(char **arg = plugin_node->argv; *arg != NULL; arg++){

272

free(*arg);

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}

274

free(plugin_node->argv);

275

for(char **env = plugin_node->environ; *env != NULL; env++){

276

free(*env);

277

}

278

free(plugin_node->environ);

279

free(plugin_node->buffer);

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/* Removes the plugin from the singly-linked list */

282

if(plugin_node == plugin_list){

283

/* First one - simple */

284

plugin_list = plugin_list->next;

285

} else {

286

/* Second one or later */

287

for(plugin *p = plugin_list; p != NULL; p = p->next){

288

if(p->next == plugin_node){

289

p->next = plugin_node->next;

290

break;

291

}

292

}

293

}

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free(plugin_node);

296

}

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static void free_plugin_list(void){

299

while(plugin_list != NULL){

300

free_plugin(plugin_list);

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301

}

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302

}

264

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int main(int argc, char *argv[]){

266

const char *plugindir = "/lib/mandos/plugins.d";

267

const char *argfile = ARGFILE;

305

char *plugindir = NULL;

306

char *argfile = NULL;

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FILE *conffp;

269

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size_t d_name_len;

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DIR *dir = NULL;

302

341

{ .name = "global-options", .key = 'g',

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342

.arg = "OPTION[,OPTION[,...]]",

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.doc = "Options passed to all plugins" },

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{ .name = "global-envs", .key = 'e',

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{ .name = "global-env", .key = 'G',

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.arg = "VAR=value",

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.doc = "Environment variable passed to all plugins" },

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{ .name = "options-for", .key = 'o',

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.arg = "PLUGIN:OPTION[,OPTION[,...]]",

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.doc = "Options passed only to specified plugin" },

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{ .name = "envs-for", .key = 'f',

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{ .name = "env-for", .key = 'E',

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.arg = "PLUGIN:ENV=value",

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.doc = "Environment variable passed to specified plugin" },

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{ .name = "disable", .key = 'd',

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.arg = "PLUGIN",

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.doc = "Disable a specific plugin", .group = 1 },

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{ .name = "enable", .key = 'e',

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.arg = "PLUGIN",

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.doc = "Enable a specific plugin", .group = 1 },

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{ .name = "plugin-dir", .key = 128,

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.arg = "DIRECTORY",

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.doc = "Specify a different plugin directory", .group = 2 },

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{ .name = "userid", .key = 129,

321

.arg = "ID", .flags = 0,

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.doc = "User ID the plugins will run as", .group = 2 },

323

{ .name = "groupid", .key = 130,

324

.arg = "ID", .flags = 0,

325

.doc = "Group ID the plugins will run as", .group = 2 },

326

{ .name = "debug", .key = 131,

327

.doc = "Debug mode", .group = 3 },

362

{ .name = "config-file", .key = 129,

363

.arg = "FILE",

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 },

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373

{ .name = NULL }

329

374

};

330

375

331

error_t parse_opt (int key, char *arg, struct argp_state *state) {

332

/* Get the INPUT argument from `argp_parse', which we know is a

333

pointer to our plugin list pointer. */

334

plugin **plugins = state->input;

376

error_t parse_opt (int key, char *arg, __attribute__((unused))

377

struct argp_state *state) {

335

378

switch (key) {

336

case 'g':

379

case 'g': /* --global-options */

337

380

if (arg != NULL){

338

381

char *p;

339

382

while((p = strsep(&arg, ",")) != NULL){

340

383

if(p[0] == '\0'){

341

384

continue;

342

385

}

343

if(not add_argument(getplugin(NULL, plugins), p)){

386

if(not add_argument(getplugin(NULL), p)){

344

387

perror("add_argument");

345

388

return ARGP_ERR_UNKNOWN;

346

389

}

347

390

}

348

391

}

349

392

break;

350

case 'e':

393

case 'G': /* --global-env */

351

394

if(arg == NULL){

352

395

break;

353

396

}

356

399

if(envdef == NULL){

357

400

break;

358

401

}

359

if(not add_environment(getplugin(NULL, plugins), envdef)){

402

if(not add_environment(getplugin(NULL), envdef, true)){

360

403

perror("add_environment");

361

404

}

362

405

}

363

406

break;

364

case 'o':

407

case 'o': /* --options-for */

365

408

if (arg != NULL){

366

409

char *p_name = strsep(&arg, ":");

367

if(p_name[0] == '\0'){

410

if(p_name[0] == '\0' or arg == NULL){

368

411

break;

369

412

}

370

413

char *opt = strsep(&arg, ":");

371

if(opt[0] == '\0'){

414

if(opt[0] == '\0' or opt == NULL){

372

415

break;

373

416

}

374

if(opt != NULL){

375

char *p;

376

while((p = strsep(&opt, ",")) != NULL){

377

if(p[0] == '\0'){

378

continue;

379

}

380

if(not add_argument(getplugin(p_name, plugins), p)){

381

perror("add_argument");

382

return ARGP_ERR_UNKNOWN;

383

}

417

char *p;

418

while((p = strsep(&opt, ",")) != NULL){

419

if(p[0] == '\0'){

420

continue;

421

}

422

if(not add_argument(getplugin(p_name), p)){

423

perror("add_argument");

424

return ARGP_ERR_UNKNOWN;

384

425

}

385

426

}

386

427

}

387

428

break;

388

case 'f':

429

case 'E': /* --env-for */

389

430

if(arg == NULL){

390

431

break;

391

432

}

399

440

break;

400

441

}

401

442

envdef++;

402

if(not add_environment(getplugin(p_name, plugins), envdef)){

443

if(not add_environment(getplugin(p_name), envdef, true)){

403

444

perror("add_environment");

404

445

}

405

446

}

406

447

break;

407

case 'd':

448

case 'd': /* --disable */

408

449

if (arg != NULL){

409

plugin *p = getplugin(arg, plugins);

450

plugin *p = getplugin(arg);

410

451

if(p == NULL){

411

452

return ARGP_ERR_UNKNOWN;

412

453

}

413

454

p->disabled = true;

414

455

}

415

456

break;

416

case 128:

417

plugindir = arg;

418

break;

419

case 129:

457

case 'e': /* --enable */

458

if (arg != NULL){

459

plugin *p = getplugin(arg);

460

if(p == NULL){

461

return ARGP_ERR_UNKNOWN;

462

}

463

p->disabled = false;

464

}

465

break;

466

case 128: /* --plugin-dir */

467

plugindir = strdup(arg);

468

if(plugindir == NULL){

469

perror("strdup");

470

}

471

break;

472

case 129: /* --config-file */

473

/* This is already done by parse_opt_config_file() */

474

break;

475

case 130: /* --userid */

420

476

uid = (uid_t)strtol(arg, NULL, 10);

421

477

break;

422

case 130:

478

case 131: /* --groupid */

423

479

gid = (gid_t)strtol(arg, NULL, 10);

424

480

break;

425

case 131:

481

case 132: /* --debug */

426

482

debug = true;

427

483

break;

428

484

case ARGP_KEY_ARG:

436

492

return 0;

437

493

}

438

494

439

plugin *plugin_list = NULL;

495

/* This option parser is the same as parse_opt() above, except it

496

ignores everything but the --config-file option. */

497

error_t parse_opt_config_file (int key, char *arg,

498

__attribute__((unused))

499

struct argp_state *state) {

500

switch (key) {

501

case 'g': /* --global-options */

502

case 'G': /* --global-env */

503

case 'o': /* --options-for */

504

case 'E': /* --env-for */

505

case 'd': /* --disable */

506

case 'e': /* --enable */

507

case 128: /* --plugin-dir */

508

break;

509

case 129: /* --config-file */

510

argfile = strdup(arg);

511

if(argfile == NULL){

512

perror("strdup");

513

}

514

break;

515

case 130: /* --userid */

516

case 131: /* --groupid */

517

case 132: /* --debug */

518

case ARGP_KEY_ARG:

519

case ARGP_KEY_END:

520

break;

521

default:

522

return ARGP_ERR_UNKNOWN;

523

}

524

return 0;

525

}

440

526

441

struct argp argp = { .options = options, .parser = parse_opt,

442

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

527

struct argp argp = { .options = options,

528

.parser = parse_opt_config_file,

529

.args_doc = "",

443

530

.doc = "Mandos plugin runner -- Run plugins" };

444

531

445

ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);

532

/* Parse using the parse_opt_config_file in order to get the custom

533

config file location, if any. */

534

ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

446

535

if (ret == ARGP_ERR_UNKNOWN){

447

536

fprintf(stderr, "Unknown error while parsing arguments\n");

448

537

exitstatus = EXIT_FAILURE;

449

538

goto fallback;

450

539

}

451

452

conffp = fopen(argfile, "r");

540

541

/* Reset to the normal argument parser */

542

argp.parser = parse_opt;

543

544

/* Open the configfile if available */

545

if (argfile == NULL){

546

conffp = fopen(AFILE, "r");

547

} else {

548

conffp = fopen(argfile, "r");

549

}

453

550

if(conffp != NULL){

454

551

char *org_line = NULL;

455

552

char *p, *arg, *new_arg, *line;

467

564

}

468

565

custom_argv[0] = argv[0];

469

566

custom_argv[1] = NULL;

470

567

568

/* for each line in the config file, strip whitespace and ignore

569

commented text */

471

570

while(true){

472

571

sret = getline(&org_line, &size, conffp);

473

572

if(sret == -1){

481

580

continue;

482

581

}

483

582

new_arg = strdup(p);

484

583

if(new_arg == NULL){

584

perror("strdup");

585

exitstatus = EXIT_FAILURE;

586

free(org_line);

587

goto fallback;

588

}

589

485

590

custom_argc += 1;

486

591

custom_argv = realloc(custom_argv, sizeof(char *)

487

592

* ((unsigned int) custom_argc + 1));

496

601

}

497

602

}

498

603

free(org_line);

499

} else{

604

} else {

500

605

/* Check for harmful errors and go to fallback. Other errors might

501

606

not affect opening plugins */

502

607

if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){

505

610

goto fallback;

506

611

}

507

612

}

508

613

/* If there was any arguments from configuration file,

614

pass them to parser as command arguments */

509

615

if(custom_argv != NULL){

510

ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);

616

ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,

617

0, NULL);

511

618

if (ret == ARGP_ERR_UNKNOWN){

512

619

fprintf(stderr, "Unknown error while parsing arguments\n");

513

620

exitstatus = EXIT_FAILURE;

515

622

}

516

623

}

517

624

625

/* Parse actual command line arguments, to let them override the

626

config file */

627

ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

628

if (ret == ARGP_ERR_UNKNOWN){

629

fprintf(stderr, "Unknown error while parsing arguments\n");

630

exitstatus = EXIT_FAILURE;

631

goto fallback;

632

}

633

518

634

if(debug){

519

635

for(plugin *p = plugin_list; p != NULL; p=p->next){

520

636

fprintf(stderr, "Plugin: %s has %d arguments\n",

529

645

}

530

646

}

531

647

648

/* Strip permissions down to nobody */

532

649

ret = setuid(uid);

533

650

if (ret == -1){

534

651

perror("setuid");

535

}

536

652

}

537

653

setgid(gid);

538

654

if (ret == -1){

539

655

perror("setgid");

540

656

}

541

657

542

dir = opendir(plugindir);

658

if (plugindir == NULL){

659

dir = opendir(PDIR);

660

} else {

661

dir = opendir(plugindir);

662

}

663

543

664

if(dir == NULL){

544

665

perror("Could not open plugin dir");

545

666

exitstatus = EXIT_FAILURE;

561

682

562

683

FD_ZERO(&rfds_all);

563

684

685

/* Read and execute any executable in the plugin directory*/

564

686

while(true){

565

687

dirst = readdir(dir);

566

688

567

// All directory entries have been processed

689

/* All directory entries have been processed */

568

690

if(dirst == NULL){

569

691

if (errno == EBADF){

570

692

perror("readdir");

576

698

577

699

d_name_len = strlen(dirst->d_name);

578

700

579

// Ignore dotfiles, backup files and other junk

701

/* Ignore dotfiles, backup files and other junk */

580

702

{

581

703

bool bad_name = false;

582

704

597

719

break;

598

720

}

599

721

}

600

601

722

if(bad_name){

602

723

continue;

603

724

}

604

605

725

for(const char **suf = bad_suffixes; *suf != NULL; suf++){

606

726

size_t suf_len = strlen(*suf);

607

727

if((d_name_len >= suf_len)

622

742

}

623

743

624

744

char *filename;

625

ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);

745

if(plugindir == NULL){

746

ret = asprintf(&filename, PDIR "/%s", dirst->d_name);

747

} else {

748

ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);

749

}

626

750

if(ret < 0){

627

751

perror("asprintf");

628

752

continue;

634

758

free(filename);

635

759

continue;

636

760

}

637

761

762

/* Ignore non-executable files */

638

763

if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){

639

764

if(debug){

640

765

fprintf(stderr, "Ignoring plugin dir entry \"%s\""

643

768

free(filename);

644

769

continue;

645

770

}

646

plugin *p = getplugin(dirst->d_name, &plugin_list);

771

772

plugin *p = getplugin(dirst->d_name);

647

773

if(p == NULL){

648

774

perror("getplugin");

649

775

free(filename);

659

785

}

660

786

{

661

787

/* Add global arguments to argument list for this plugin */

662

plugin *g = getplugin(NULL, &plugin_list);

788

plugin *g = getplugin(NULL);

663

789

if(g != NULL){

664

790

for(char **a = g->argv + 1; *a != NULL; a++){

665

791

if(not add_argument(p, *a)){

668

794

}

669

795

/* Add global environment variables */

670

796

for(char **e = g->environ; *e != NULL; e++){

671

if(not add_environment(p, *e)){

797

if(not add_environment(p, *e, false)){

672

798

perror("add_environment");

673

799

}

674

800

}

679

805

process, too. */

680

806

if(p->environ[0] != NULL){

681

807

for(char **e = environ; *e != NULL; e++){

682

char *copy = strdup(*e);

683

if(copy == NULL){

684

perror("strdup");

685

continue;

686

}

687

if(not add_environment(p, copy)){

808

if(not add_environment(p, *e, false)){

688

809

perror("add_environment");

689

810

}

690

811

}

697

818

exitstatus = EXIT_FAILURE;

698

819

goto fallback;

699

820

}

821

/* Ask OS to automatic close the pipe on exec */

700

822

ret = set_cloexec_flag(pipefd[0]);

701

823

if(ret < 0){

702

824

perror("set_cloexec_flag");

716

838

exitstatus = EXIT_FAILURE;

717

839

goto fallback;

718

840

}

719

// Starting a new process to be watched

841

/* Starting a new process to be watched */

720

842

pid_t pid = fork();

721

843

if(pid == -1){

722

844

perror("fork");

760

882

}

761

883

/* no return */

762

884

}

763

/* parent process */

885

/* Parent process */

886

close(pipefd[1]); /* Close unused write end of pipe */

764

887

free(filename);

765

close(pipefd[1]); /* close unused write end of pipe */

766

process *new_process = malloc(sizeof(process));

767

if (new_process == NULL){

768

perror("malloc");

888

plugin *new_plugin = getplugin(dirst->d_name);

889

if (new_plugin == NULL){

890

perror("getplugin");

769

891

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

770

892

if(ret < 0){

771

perror("sigprocmask");

893

perror("sigprocmask");

772

894

}

773

895

exitstatus = EXIT_FAILURE;

774

896

goto fallback;

775

897

}

776

898

777

*new_process = (struct process){ .pid = pid,

778

.fd = pipefd[0],

779

.next = process_list };

780

// List handling

781

process_list = new_process;

899

new_plugin->pid = pid;

900

new_plugin->fd = pipefd[0];

901

782

902

/* Unblock SIGCHLD so signal handler can be run if this process

783

903

has already completed */

784

904

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

788

908

goto fallback;

789

909

}

790

910

791

FD_SET(new_process->fd, &rfds_all);

911

FD_SET(new_plugin->fd, &rfds_all);

792

912

793

if (maxfd < new_process->fd){

794

maxfd = new_process->fd;

913

if (maxfd < new_plugin->fd){

914

maxfd = new_plugin->fd;

795

915

}

796

916

797

917

}

798

918

799

free_plugin_list(plugin_list);

800

plugin_list = NULL;

801

802

919

closedir(dir);

803

920

dir = NULL;

804

805

if (process_list == NULL){

806

fprintf(stderr, "No plugin processes started. Incorrect plugin"

807

" directory?\n");

808

process_list = NULL;

921

922

for(plugin *p = plugin_list; p != NULL; p = p->next){

923

if(p->pid != 0){

924

break;

925

}

926

if(p->next == NULL){

927

fprintf(stderr, "No plugin processes started. Incorrect plugin"

928

" directory?\n");

929

free_plugin_list();

930

}

809

931

}

810

while(process_list){

932

933

/* Main loop while running plugins exist */

934

while(plugin_list){

811

935

fd_set rfds = rfds_all;

812

936

int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);

813

937

if (select_ret == -1){

817

941

}

818

942

/* OK, now either a process completed, or something can be read

819

943

from one of them */

820

for(process *proc = process_list; proc ; proc = proc->next){

944

for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){

821

945

/* Is this process completely done? */

822

946

if(proc->eof and proc->completed){

823

947

/* Only accept the plugin output if it exited cleanly */

824

948

if(not WIFEXITED(proc->status)

825

949

or WEXITSTATUS(proc->status) != 0){

826

950

/* Bad exit by plugin */

951

827

952

if(debug){

828

953

if(WIFEXITED(proc->status)){

829

954

fprintf(stderr, "Plugin %u exited with status %d\n",

838

963

(unsigned int) (proc->pid));

839

964

}

840

965

}

966

841

967

/* Remove the plugin */

842

968

FD_CLR(proc->fd, &rfds_all);

969

843

970

/* Block signal while modifying process_list */

844

971

ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);

845

972

if(ret < 0){

847

974

exitstatus = EXIT_FAILURE;

848

975

goto fallback;

849

976

}

850

/* Delete this process entry from the list */

851

if(process_list == proc){

852

/* First one - simple */

853

process_list = proc->next;

854

} else {

855

/* Second one or later */

856

for(process *p = process_list; p != NULL; p = p->next){

857

if(p->next == proc){

858

p->next = proc->next;

859

break;

860

}

861

}

862

}

977

free_plugin(proc);

863

978

/* We are done modifying process list, so unblock signal */

864

979

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

865

980

NULL);

866

981

if(ret < 0){

867

982

perror("sigprocmask");

868

}

869

free(proc->buffer);

870

free(proc);

871

/* We deleted this process from the list, so we can't go

872

proc->next. Therefore, start over from the beginning of

873

the process list */

874

break;

983

exitstatus = EXIT_FAILURE;

984

goto fallback;

985

}

986

987

if(plugin_list == NULL){

988

break;

989

}

990

continue;

875

991

}

992

876

993

/* This process exited nicely, so print its buffer */

877

994

878

995

bool bret = print_out_password(proc->buffer,

883

1000

}

884

1001

goto fallback;

885

1002

}

1003

886

1004

/* This process has not completed. Does it have any output? */

887

1005

if(proc->eof or not FD_ISSET(proc->fd, &rfds)){

888

1006

/* This process had nothing to say at this time */

918

1036

919

1037

fallback:

920

1038

921

if(process_list == NULL or exitstatus != EXIT_SUCCESS){

1039

if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){

922

1040

/* Fallback if all plugins failed, none are found or an error

923

1041

occured */

924

1042

bool bret;

925

1043

fprintf(stderr, "Going to fallback mode using getpass(3)\n");

926

1044

char *passwordbuffer = getpass("Password: ");

927

bret = print_out_password(passwordbuffer, strlen(passwordbuffer));

1045

size_t len = strlen(passwordbuffer);

1046

/* Strip trailing newline */

1047

if(len > 0 and passwordbuffer[len-1] == '\n'){

1048

passwordbuffer[len-1] = '\0'; /* not strictly necessary */

1049

len--;

1050

}

1051

bret = print_out_password(passwordbuffer, len);

928

1052

if(not bret){

929

1053

perror("print_out_password");

930

1054

exitstatus = EXIT_FAILURE;

944

1068

}

945

1069

free(custom_argv);

946

1070

}

947

free_plugin_list(plugin_list);

948

1071

949

1072

if(dir != NULL){

950

1073

closedir(dir);

951

1074

}

952

1075

953

1076

/* Free the process list and kill the processes */

954

for(process *next; process_list != NULL; process_list = next){

955

next = process_list->next;

956

close(process_list->fd);

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");

1077

for(plugin *p = plugin_list; p != NULL; p = p->next){

1078

if(p->pid != 0){

1079

close(p->fd);

1080

ret = kill(p->pid, SIGTERM);

1081

if(ret == -1 and errno != ESRCH){

1082

/* Set-uid proccesses might not get closed */

1083

perror("kill");

1084

}

961

1085

}

962

free(process_list->buffer);

963

free(process_list);

964

1086

}

965

1087

966

1088

/* Wait for any remaining child processes to terminate */

970

1092

if(errno != ECHILD){

971

1093

perror("wait");

972

1094

}

1095

1096

free_plugin_list();

1097

1098

free(plugindir);

1099

free(argfile);

973

1100

974

1101

return exitstatus;

975

1102

}