/mandos/release : revision 101

21

* Contact the authors at <mandos@fukt.bsnet.se>.

22

*/

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

202

/* Mark a process as completed when it exits, and save its exit

141

205

process *proc = process_list;

142

206

int status;

143

207

pid_t pid = wait(&status);

208

if(pid == -1){

209

perror("wait");

210

return;

211

}

144

212

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

145

213

proc = proc->next;

146

214

}

152

220

proc->completed = true;

153

221

}

154

222

223

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

224

ssize_t ret;

225

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

226

length--;

227

}

228

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

229

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

230

length - written));

231

if(ret < 0){

232

return false;

233

}

234

}

235

return true;

236

}

237

238

char **add_to_argv(char **argv, int *argc, char *arg){

239

if (argv == NULL){

240

*argc = 1;

241

argv = malloc(sizeof(char*) * 2);

242

if(argv == NULL){

243

return NULL;

244

}

245

argv[0] = NULL; /* Will be set to argv[0] in main before parsing */

246

argv[1] = NULL;

247

}

248

*argc += 1;

249

argv = realloc(argv, sizeof(char *)

250

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

251

if(argv == NULL){

252

return NULL;

253

}

254

argv[*argc-1] = arg;

255

argv[*argc] = NULL;

256

return argv;

257

}

258

259

static void free_plugin_list(plugin *plugin_list){

260

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

261

next = plugin_list->next;

262

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

263

free(*arg);

264

}

265

free(plugin_list->argv);

266

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

267

free(*env);

268

}

269

free(plugin_list->environ);

270

free(plugin_list);

271

}

272

}

273

155

274

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

156

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

275

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

276

const char *argfile = ARGFILE;

277

FILE *conffp;

157

278

size_t d_name_len;

158

279

DIR *dir = NULL;

159

280

struct dirent *dirst;

167

288

struct sigaction old_sigchld_action;

168

289

struct sigaction sigchld_action = { .sa_handler = handle_sigchld,

169

290

.sa_flags = SA_NOCLDSTOP };

170

char *plus_options = NULL;

171

char **plus_argv = NULL;

291

char **custom_argv = NULL;

292

int custom_argc = 0;

172

293

173

294

/* Establish a signal handler */

174

295

sigemptyset(&sigchld_action.sa_mask);

175

296

ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);

176

if(ret < 0){

297

if(ret == -1){

177

298

perror("sigaddset");

178

exit(EXIT_FAILURE);

299

exitstatus = EXIT_FAILURE;

300

goto fallback;

179

301

}

180

302

ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);

181

if(ret < 0){

303

if(ret == -1){

182

304

perror("sigaction");

183

exit(EXIT_FAILURE);

305

exitstatus = EXIT_FAILURE;

306

goto fallback;

184

307

}

185

308

186

309

/* The options we understand. */

188

311

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

189

312

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

190

313

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

314

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

315

.arg = "VAR=value",

316

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

191

317

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

192

318

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

193

319

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

320

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

321

.arg = "PLUGIN:ENV=value",

322

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

194

323

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

195

324

.arg = "PLUGIN",

196

325

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

215

344

switch (key) {

216

345

case 'g':

217

346

if (arg != NULL){

218

char *p = strtok(arg, ",");

219

do{

220

addargument(getplugin(NULL, plugins), p);

221

p = strtok(NULL, ",");

222

} while (p != NULL);

347

char *p;

348

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

349

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

350

continue;

351

}

352

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

353

perror("add_argument");

354

return ARGP_ERR_UNKNOWN;

355

}

356

}

357

}

358

break;

359

case 'e':

360

if(arg == NULL){

361

break;

362

}

363

{

364

char *envdef = strdup(arg);

365

if(envdef == NULL){

366

break;

367

}

368

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

369

perror("add_environment");

370

}

223

371

}

224

372

break;

225

373

case 'o':

226

374

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);

375

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

376

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

377

break;

378

}

379

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

380

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

381

break;

382

}

383

if(opt != NULL){

384

char *p;

385

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

386

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

387

continue;

388

}

389

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

390

perror("add_argument");

391

return ARGP_ERR_UNKNOWN;

392

}

393

}

394

}

395

}

396

break;

397

case 'f':

398

if(arg == NULL){

399

break;

400

}

401

{

402

char *envdef = strchr(arg, ':');

403

if(envdef == NULL){

404

break;

405

}

406

char *p_name = strndup(arg, (size_t) (envdef-arg));

407

if(p_name == NULL){

408

break;

409

}

410

envdef++;

411

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

412

perror("add_environment");

235

413

}

236

414

}

237

415

break;

238

416

case 'd':

239

417

if (arg != NULL){

240

getplugin(arg, plugins)->disabled = true;

418

plugin *p = getplugin(arg, plugins);

419

if(p == NULL){

420

return ARGP_ERR_UNKNOWN;

421

}

422

p->disabled = true;

241

423

}

242

424

break;

243

425

case 128:

253

435

debug = true;

254

436

break;

255

437

case ARGP_KEY_ARG:

256

if(plus_options != NULL or arg == NULL or arg[0] != '+'){

257

argp_usage (state);

258

}

259

plus_options = arg;

438

fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);

260

439

break;

261

440

case ARGP_KEY_END:

262

441

break;

272

451

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

273

452

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

274

453

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);

454

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

455

if (ret == ARGP_ERR_UNKNOWN){

456

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

457

exitstatus = EXIT_FAILURE;

458

goto fallback;

459

}

460

461

conffp = fopen(argfile, "r");

462

if(conffp != NULL){

463

char *org_line = NULL;

464

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

465

size_t size = 0;

466

ssize_t sret;

467

const char whitespace_delims[] = " \r\t\f\v\n";

468

const char comment_delim[] = "#";

469

470

while(true){

471

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

472

if(sret == -1){

473

break;

474

}

475

476

line = org_line;

477

arg = strsep(&line, comment_delim);

478

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

479

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

480

continue;

481

}

482

new_arg = strdup(p);

483

custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);

484

if (custom_argv == NULL){

485

perror("add_to_argv");

486

exitstatus = EXIT_FAILURE;

487

goto fallback;

488

}

489

}

490

}

491

free(org_line);

492

} else{

493

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

494

not affect opening plugins */

495

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

496

perror("fopen");

497

exitstatus = EXIT_FAILURE;

498

goto fallback;

499

}

500

}

501

502

if(custom_argv != NULL){

503

custom_argv[0] = argv[0];

504

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

505

if (ret == ARGP_ERR_UNKNOWN){

506

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

507

exitstatus = EXIT_FAILURE;

508

goto fallback;

509

}

308

510

}

309

511

310

512

if(debug){

314

516

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

315

517

fprintf(stderr, "\tArg: %s\n", *a);

316

518

}

519

fprintf(stderr, "...and %u environment variables\n", p->envc);

520

for(char **a = p->environ; *a != NULL; a++){

521

fprintf(stderr, "\t%s\n", *a);

522

}

317

523

}

318

524

}

319

525

331

537

if(dir == NULL){

332

538

perror("Could not open plugin dir");

333

539

exitstatus = EXIT_FAILURE;

334

goto end;

540

goto fallback;

335

541

}

336

542

337

543

/* Set the FD_CLOEXEC flag on the directory, if possible */

342

548

if(ret < 0){

343

549

perror("set_cloexec_flag");

344

550

exitstatus = EXIT_FAILURE;

345

goto end;

551

goto fallback;

346

552

}

347

553

}

348

554

}

354

560

355

561

// All directory entries have been processed

356

562

if(dirst == NULL){

563

if (errno == EBADF){

564

perror("readdir");

565

exitstatus = EXIT_FAILURE;

566

goto fallback;

567

}

357

568

break;

358

569

}

359

570

403

614

continue;

404

615

}

405

616

}

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);

617

618

char *filename;

619

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

620

if(ret < 0){

621

perror("asprintf");

622

continue;

623

}

624

625

ret = stat(filename, &st);

626

if (ret == -1){

627

perror("stat");

628

free(filename);

629

continue;

630

}

418

631

419

632

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

420

633

if(debug){

424

637

free(filename);

425

638

continue;

426

639

}

427

if(getplugin(dirst->d_name, &plugin_list)->disabled){

640

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

641

if(p == NULL){

642

perror("getplugin");

643

free(filename);

644

continue;

645

}

646

if(p->disabled){

428

647

if(debug){

429

648

fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",

430

649

dirst->d_name);

432

651

free(filename);

433

652

continue;

434

653

}

435

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

436

654

{

437

655

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

438

656

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];

657

if(g != NULL){

658

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

659

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

660

perror("add_argument");

661

}

662

}

663

/* Add global environment variables */

664

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

665

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

666

perror("add_environment");

667

}

668

}

669

}

670

}

671

/* If this plugin has any environment variables, we will call

672

using execve and need to duplicate the environment from this

673

process, too. */

674

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

675

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

676

char *copy = strdup(*e);

677

if(copy == NULL){

678

perror("strdup");

679

continue;

680

}

681

if(not add_environment(p, copy)){

682

perror("add_environment");

683

}

684

}

685

}

686

687

int pipefd[2];

444

688

ret = pipe(pipefd);

445

689

if (ret == -1){

446

690

perror("pipe");

447

691

exitstatus = EXIT_FAILURE;

448

goto end;

692

goto fallback;

449

693

}

450

694

ret = set_cloexec_flag(pipefd[0]);

451

695

if(ret < 0){

452

696

perror("set_cloexec_flag");

453

697

exitstatus = EXIT_FAILURE;

454

goto end;

698

goto fallback;

455

699

}

456

700

ret = set_cloexec_flag(pipefd[1]);

457

701

if(ret < 0){

458

702

perror("set_cloexec_flag");

459

703

exitstatus = EXIT_FAILURE;

460

goto end;

704

goto fallback;

461

705

}

462

706

/* Block SIGCHLD until process is safely in process list */

463

707

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

464

708

if(ret < 0){

465

709

perror("sigprocmask");

466

710

exitstatus = EXIT_FAILURE;

467

goto end;

711

goto fallback;

468

712

}

469

713

// Starting a new process to be watched

470

714

pid_t pid = fork();

715

if(pid == -1){

716

perror("fork");

717

exitstatus = EXIT_FAILURE;

718

goto fallback;

719

}

471

720

if(pid == 0){

472

721

/* this is the child process */

473

722

ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);

480

729

perror("sigprocmask");

481

730

_exit(EXIT_FAILURE);

482

731

}

483

dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */

732

733

ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */

734

if(ret == -1){

735

perror("dup2");

736

_exit(EXIT_FAILURE);

737

}

484

738

485

739

if(dirfd(dir) < 0){

486

740

/* If dir has no file descriptor, we could not set FD_CLOEXEC

487

741

above and must now close it manually here. */

488

742

closedir(dir);

489

743

}

490

if(execv(filename, p->argv) < 0){

491

perror("execv");

492

_exit(EXIT_FAILURE);

744

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

745

if(execv(filename, p->argv) < 0){

746

perror("execv");

747

_exit(EXIT_FAILURE);

748

}

749

} else {

750

if(execve(filename, p->argv, p->environ) < 0){

751

perror("execve");

752

_exit(EXIT_FAILURE);

753

}

493

754

}

494

755

/* no return */

495

756

}

504

765

perror("sigprocmask");

505

766

}

506

767

exitstatus = EXIT_FAILURE;

507

goto end;

768

goto fallback;

508

769

}

509

770

510

771

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

518

779

if(ret < 0){

519

780

perror("sigprocmask");

520

781

exitstatus = EXIT_FAILURE;

521

goto end;

782

goto fallback;

522

783

}

523

784

524

785

FD_SET(new_process->fd, &rfds_all);

529

790

530

791

}

531

792

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

}

793

free_plugin_list(plugin_list);

794

plugin_list = NULL;

538

795

539

796

closedir(dir);

540

797

dir = NULL;

541

798

542

799

if (process_list == NULL){

543

fprintf(stderr, "No plugin processes started, exiting\n");

544

exitstatus = EXIT_FAILURE;

545

goto end;

800

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

801

" directory?\n");

802

process_list = NULL;

546

803

}

547

804

while(process_list){

548

805

fd_set rfds = rfds_all;

550

807

if (select_ret == -1){

551

808

perror("select");

552

809

exitstatus = EXIT_FAILURE;

553

goto end;

810

goto fallback;

554

811

}

555

812

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

556

813

from one of them */

563

820

/* Bad exit by plugin */

564

821

if(debug){

565

822

if(WIFEXITED(proc->status)){

566

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

567

proc->pid, WEXITSTATUS(proc->status));

823

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

824

(unsigned int) (proc->pid),

825

WEXITSTATUS(proc->status));

568

826

} else if(WIFSIGNALED(proc->status)) {

569

fprintf(stderr, "Plugin %d killed by signal %d\n",

570

proc->pid, WTERMSIG(proc->status));

827

fprintf(stderr, "Plugin %u killed by signal %d\n",

828

(unsigned int) (proc->pid),

829

WTERMSIG(proc->status));

571

830

} else if(WCOREDUMP(proc->status)){

572

fprintf(stderr, "Plugin %d dumped core\n", proc->pid);

831

fprintf(stderr, "Plugin %d dumped core\n",

832

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

573

833

}

574

834

}

575

835

/* Remove the plugin */

579

839

if(ret < 0){

580

840

perror("sigprocmask");

581

841

exitstatus = EXIT_FAILURE;

582

goto end;

842

goto fallback;

583

843

}

584

844

/* Delete this process entry from the list */

585

845

if(process_list == proc){

608

868

break;

609

869

}

610

870

/* 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

}

871

872

bool bret = print_out_password(proc->buffer, proc->buffer_length);

873

if(not bret){

874

perror("print_out_password");

875

exitstatus = EXIT_FAILURE;

622

876

}

623

goto end;

877

goto fallback;

624

878

}

625

879

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

626

880

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

634

888

if (proc->buffer == NULL){

635

889

perror("malloc");

636

890

exitstatus = EXIT_FAILURE;

637

goto end;

891

goto fallback;

638

892

}

639

893

proc->buffer_size += BUFFER_SIZE;

640

894

}

653

907

}

654

908

}

655

909

}

656

if(process_list == NULL){

657

fprintf(stderr, "All plugin processes failed, exiting\n");

658

exitstatus = EXIT_FAILURE;

910

911

912

fallback:

913

914

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

915

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

916

bool bret;

917

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

918

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

919

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

920

if(not bret){

921

perror("print_out_password");

922

exitstatus = EXIT_FAILURE;

923

}

659

924

}

660

925

661

end:

662

926

/* 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

}

927

ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);

928

if(ret == -1){

929

perror("sigaction");

930

exitstatus = EXIT_FAILURE;

931

}

932

933

if(custom_argv != NULL){

934

for(char **arg = custom_argv; *arg != NULL; arg++){

935

free(*arg);

936

}

937

free(custom_argv);

938

}

939

free_plugin_list(plugin_list);

673

940

674

941

if(dir != NULL){

675

942

closedir(dir);

679

946

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

680

947

next = process_list->next;

681

948

close(process_list->fd);

682

kill(process_list->pid, SIGTERM);

949

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

950

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

951

/* set-uid proccesses migth not get closed */

952

perror("kill");

953

}

683

954

free(process_list->buffer);

684

955

free(process_list);

685

956

}