/mandos/release : revision 24.1.8

21

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

22

*/

23

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() */

24

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

25

26

#include <stdio.h> /* popen(), fileno(), fprintf(),

27

stderr, STDOUT_FILENO */

42

28

#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() */

43

34

#include <dirent.h> /* DIR, struct dirent, opendir(),

44

readdir(), closedir(), dirfd() */

35

readdir(), closedir() */

36

#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */

45

37

#include <unistd.h> /* struct stat, stat(), S_ISREG(),

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() */

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() */

55

48

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

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 */

65

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>";

49

#include <argp.h> /* struct argp_option,

50

struct argp_state, struct argp,

51

argp_parse() */

71

52

72

53

struct process;

73

54

87

68

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

88

69

char **argv;

89

70

int argc;

90

char **environ;

91

int envc;

92

71

bool disabled;

93

72

struct plugin *next;

94

73

} plugin;

95

74

96

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

75

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

97

76

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

98

77

if ((p->name == name)

99

78

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

103

82

/* Create a new plugin */

104

83

plugin *new_plugin = malloc(sizeof(plugin));

105

84

if (new_plugin == NULL){

106

return NULL;

85

perror("malloc");

86

exit(EXIT_FAILURE);

107

87

}

108

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

109

.argc = 1,

110

.envc = 0,

111

.disabled = false,

112

.next = *plugin_list };

113

88

new_plugin->name = name;

114

89

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

115

90

if (new_plugin->argv == NULL){

116

free(new_plugin);

117

return NULL;

91

perror("malloc");

92

exit(EXIT_FAILURE);

118

93

}

119

94

new_plugin->argv[0] = name;

120

95

new_plugin->argv[1] = NULL;

121

122

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

123

if(new_plugin->environ == NULL){

124

free(new_plugin->argv);

125

free(new_plugin);

126

return NULL;

127

}

128

new_plugin->environ[0] = NULL;

96

new_plugin->argc = 1;

97

new_plugin->disabled = false;

98

new_plugin->next = *plugin_list;

129

99

/* Append the new plugin to the list */

130

100

*plugin_list = new_plugin;

131

101

return new_plugin;

132

102

}

133

103

134

/* Helper function for add_argument and add_environment */

135

static bool add_to_char_array(const char *new, char ***array,

136

int *len){

137

/* Resize the pointed-to array to hold one more pointer */

138

*array = realloc(*array, sizeof(char *)

139

* (size_t) ((*len) + 2));

140

/* Malloc check */

141

if(*array == NULL){

142

return false;

143

}

144

/* Make a copy of the new string */

145

char *copy = strdup(new);

146

if(copy == NULL){

147

return false;

148

}

149

/* Insert the copy */

150

(*array)[*len] = copy;

151

(*len)++;

152

/* Add a new terminating NULL pointer to the last element */

153

(*array)[*len] = NULL;

154

return true;

155

}

156

157

/* Add to a plugin's argument vector */

158

static bool add_argument(plugin *p, const char *arg){

159

if(p == NULL){

160

return false;

161

}

162

return add_to_char_array(arg, &(p->argv), &(p->argc));

163

}

164

165

/* Add to a plugin's environment */

166

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

167

if(p == NULL){

168

return false;

169

}

170

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

171

}

172

104

void addargument(plugin *p, char *arg){

105

p->argv[p->argc] = arg;

106

p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));

107

if (p->argv == NULL){

108

perror("malloc");

109

exit(EXIT_FAILURE);

110

}

111

p->argc++;

112

p->argv[p->argc] = NULL;

113

}

173

114

174

115

/*

175

116

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

176

117

* Descriptor Flags".

177

118

* *Note File Descriptor Flags:(libc)Descriptor Flags.

178

119

*/

179

static int set_cloexec_flag(int fd)

120

int set_cloexec_flag(int fd)

180

121

{

181

122

int ret = fcntl(fd, F_GETFD, 0);

182

123

/* If reading the flags failed, return error indication now. */

187

128

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

188

129

}

189

130

131

#define BUFFER_SIZE 256

132

133

const char *argp_program_version = "plugbasedclient 0.9";

134

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

135

190

136

process *process_list = NULL;

191

137

192

138

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

195

141

process *proc = process_list;

196

142

int status;

197

143

pid_t pid = wait(&status);

198

if(pid == -1){

199

perror("wait");

200

return;

201

}

202

144

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

203

145

proc = proc->next;

204

146

}

210

152

proc->completed = true;

211

153

}

212

154

213

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

214

ssize_t ret;

215

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

216

length--;

217

}

218

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

219

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

220

length - written));

221

if(ret < 0){

222

return false;

223

}

224

}

225

return true;

226

}

227

228

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

229

if (argv == NULL){

230

*argc = 1;

231

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

232

if(argv == NULL){

233

return NULL;

234

}

235

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

236

argv[1] = NULL;

237

}

238

*argc += 1;

239

argv = realloc(argv, sizeof(char *)

240

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

241

if(argv == NULL){

242

return NULL;

243

}

244

argv[*argc-1] = arg;

245

argv[*argc] = NULL;

246

return argv;

247

}

248

249

155

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

250

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

251

const char *argfile = ARGFILE;

252

FILE *conffp;

156

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

253

157

size_t d_name_len;

254

158

DIR *dir = NULL;

255

159

struct dirent *dirst;

263

167

struct sigaction old_sigchld_action;

264

168

struct sigaction sigchld_action = { .sa_handler = handle_sigchld,

265

169

.sa_flags = SA_NOCLDSTOP };

266

char **custom_argv = NULL;

267

int custom_argc = 0;

170

char *plus_options = NULL;

171

char **plus_argv = NULL;

268

172

269

173

/* Establish a signal handler */

270

174

sigemptyset(&sigchld_action.sa_mask);

284

188

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

285

189

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

286

190

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

287

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

288

.arg = "VAR=value",

289

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

290

191

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

291

192

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

292

193

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

293

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

294

.arg = "PLUGIN:ENV=value",

295

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

296

194

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

297

195

.arg = "PLUGIN",

298

196

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

317

215

switch (key) {

318

216

case 'g':

319

217

if (arg != NULL){

320

char *p;

321

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

322

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

323

continue;

324

}

325

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

326

perror("add_argument");

327

return ARGP_ERR_UNKNOWN;

328

}

329

}

330

}

331

break;

332

case 'e':

333

if(arg == NULL){

334

break;

335

}

336

{

337

char *envdef = strdup(arg);

338

if(envdef == NULL){

339

break;

340

}

341

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

342

perror("add_environment");

343

}

218

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

219

do{

220

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

221

p = strtok(NULL, ",");

222

} while (p != NULL);

344

223

}

345

224

break;

346

225

case 'o':

347

226

if (arg != NULL){

348

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

349

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

350

break;

351

}

352

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

353

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

354

break;

355

}

356

if(opt != NULL){

357

char *p;

358

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

359

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

360

continue;

361

}

362

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

363

perror("add_argument");

364

return ARGP_ERR_UNKNOWN;

365

}

366

}

367

}

368

}

369

break;

370

case 'f':

371

if(arg == NULL){

372

break;

373

}

374

{

375

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

376

if(envdef == NULL){

377

break;

378

}

379

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

380

if(p_name == NULL){

381

break;

382

}

383

envdef++;

384

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

385

perror("add_environment");

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);

386

235

}

387

236

}

388

237

break;

389

238

case 'd':

390

239

if (arg != NULL){

391

plugin *p = getplugin(arg, plugins);

392

if(p == NULL){

393

return ARGP_ERR_UNKNOWN;

394

}

395

p->disabled = true;

240

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

396

241

}

397

242

break;

398

243

case 128:

408

253

debug = true;

409

254

break;

410

255

case ARGP_KEY_ARG:

411

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

256

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

257

argp_usage (state);

258

}

259

plus_options = arg;

412

260

break;

413

261

case ARGP_KEY_END:

414

262

break;

424

272

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

425

273

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

426

274

427

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

428

if (ret == ARGP_ERR_UNKNOWN){

429

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

430

exitstatus = EXIT_FAILURE;

431

goto end;

432

}

433

434

conffp = fopen(argfile, "r");

435

if(conffp != NULL){

436

char *org_line = NULL;

437

size_t size = 0;

438

ssize_t sret;

439

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

440

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

441

const char comment_delim[] = "#";

442

443

while(true){

444

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

445

if(sret == -1){

446

break;

447

}

448

449

line = org_line;

450

arg = strsep(&line, comment_delim);

451

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

452

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

453

continue;

454

}

455

new_arg = strdup(p);

456

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

457

if (custom_argv == NULL){

458

perror("add_to_argv");

459

exitstatus = EXIT_FAILURE;

460

goto end;

461

}

462

}

463

}

464

free(org_line);

465

} else{

466

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

467

not affect opening plugins */

468

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

469

perror("fopen");

470

exitstatus = EXIT_FAILURE;

471

goto end;

472

}

473

}

474

475

if(custom_argv != NULL){

476

custom_argv[0] = argv[0];

477

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

478

if (ret == ARGP_ERR_UNKNOWN){

479

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

480

exitstatus = EXIT_FAILURE;

481

goto end;

482

}

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);

483

308

}

484

309

485

310

if(debug){

489

314

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

490

315

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

491

316

}

492

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

493

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

494

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

495

}

496

317

}

497

318

}

498

319

503

324

504

325

setgid(gid);

505

326

if (ret == -1){

506

perror("setgid");

327

perror("setuid");

507

328

}

508

329

509

330

dir = opendir(plugindir);

533

354

534

355

// All directory entries have been processed

535

356

if(dirst == NULL){

536

if (errno == EBADF){

537

perror("readdir");

538

exitstatus = EXIT_FAILURE;

539

goto end;

540

}

541

357

break;

542

358

}

543

359

587

403

continue;

588

404

}

589

405

}

590

591

char *filename;

592

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

593

if(ret < 0){

594

perror("asprintf");

595

continue;

596

}

597

598

ret = stat(filename, &st);

599

if (ret == -1){

600

perror("stat");

601

free(filename);

602

continue;

603

}

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);

604

418

605

419

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

606

420

if(debug){

610

424

free(filename);

611

425

continue;

612

426

}

613

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

614

if(p == NULL){

615

perror("getplugin");

616

free(filename);

617

continue;

618

}

619

if(p->disabled){

427

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

620

428

if(debug){

621

429

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

622

430

dirst->d_name);

624

432

free(filename);

625

433

continue;

626

434

}

435

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

627

436

{

628

437

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

629

438

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

630

if(g != NULL){

631

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

632

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

633

perror("add_argument");

634

}

635

}

636

/* Add global environment variables */

637

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

638

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

639

perror("add_environment");

640

}

641

}

642

}

643

}

644

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

645

using execve and need to duplicate the environment from this

646

process, too. */

647

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

648

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

649

char *copy = strdup(*e);

650

if(copy == NULL){

651

perror("strdup");

652

continue;

653

}

654

if(not add_environment(p, copy)){

655

perror("add_environment");

656

}

657

}

658

}

659

439

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

440

addargument(p, *a);

441

}

442

}

660

443

int pipefd[2];

661

444

ret = pipe(pipefd);

662

445

if (ret == -1){

685

468

}

686

469

// Starting a new process to be watched

687

470

pid_t pid = fork();

688

if(pid == -1){

689

perror("fork");

690

exitstatus = EXIT_FAILURE;

691

goto end;

692

}

693

471

if(pid == 0){

694

472

/* this is the child process */

695

473

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

702

480

perror("sigprocmask");

703

481

_exit(EXIT_FAILURE);

704

482

}

705

706

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

707

if(ret == -1){

708

perror("dup2");

709

_exit(EXIT_FAILURE);

710

}

483

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

711

484

712

485

if(dirfd(dir) < 0){

713

486

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

714

487

above and must now close it manually here. */

715

488

closedir(dir);

716

489

}

717

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

718

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

719

perror("execv");

720

_exit(EXIT_FAILURE);

721

}

722

} else {

723

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

724

perror("execve");

725

_exit(EXIT_FAILURE);

726

}

490

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

491

perror("execv");

492

_exit(EXIT_FAILURE);

727

493

}

728

494

/* no return */

729

495

}

767

533

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

768

534

next = plugin_list->next;

769

535

free(plugin_list->argv);

770

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

771

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

772

free(*e);

773

}

774

}

775

536

free(plugin_list);

776

537

}

777

538

778

539

closedir(dir);

779

540

dir = NULL;

780

541

781

542

if (process_list == NULL){

782

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

783

" directory?\n");

784

process_list = NULL;

543

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

544

exitstatus = EXIT_FAILURE;

545

goto end;

785

546

}

786

547

while(process_list){

787

548

fd_set rfds = rfds_all;

802

563

/* Bad exit by plugin */

803

564

if(debug){

804

565

if(WIFEXITED(proc->status)){

805

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

806

(unsigned int) (proc->pid),

807

WEXITSTATUS(proc->status));

566

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

567

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

808

568

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

809

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

810

(unsigned int) (proc->pid),

811

WTERMSIG(proc->status));

569

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

570

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

812

571

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

813

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

814

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

572

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

815

573

}

816

574

}

817

575

/* Remove the plugin */

850

608

break;

851

609

}

852

610

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

853

854

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

855

if(not bret){

856

perror("print_out_password");

857

exitstatus = EXIT_FAILURE;

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

}

858

622

}

859

623

goto end;

860

624

}

889

653

}

890

654

}

891

655

}

892

893

656

if(process_list == NULL){

657

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

658

exitstatus = EXIT_FAILURE;

659

}

660

894

661

end:

895

896

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

897

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

898

bool bret;

899

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

900

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

901

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

902

if(not bret){

903

perror("print_out_password");

904

exitstatus = EXIT_FAILURE;

905

goto end;

906

}

907

}

908

909

662

/* Restore old signal handler */

910

663

sigaction(SIGCHLD, &old_sigchld_action, NULL);

911

664

912

free(custom_argv);

665

free(plus_argv);

913

666

914

667

/* Free the plugin list */

915

668

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

916

669

next = plugin_list->next;

917

670

free(plugin_list->argv);

918

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

919

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

920

free(*e);

921

}

922

}

923

free(plugin_list->environ);

924

671

free(plugin_list);

925

672

}

926

673

932

679

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

933

680

next = process_list->next;

934

681

close(process_list->fd);

935

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

936

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

937

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

938

perror("kill");

939

}

682

kill(process_list->pid, SIGTERM);

940

683

free(process_list->buffer);

941

684

free(process_list);

942

685

}