/mandos/trunk : revision 24.1.30

21

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

22

*/

23

24

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),

25

asprintf() */

24

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

25

26

#include <stddef.h> /* size_t, NULL */

27

#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,

28

EXIT_SUCCESS, realloc() */

51

close() */

52

#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,

53

FD_CLOEXEC */

54

#include <string.h> /* strsep, strlen(), asprintf() */

54

#include <string.h> /* strtok, strlen(), strcpy(),

55

strcat() */

55

56

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

56

57

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

57

58

argp_state, struct argp,

64

65

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

65

66

67

#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>";

71

68

72

69

struct process;

73

70

87

84

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

88

85

char **argv;

89

86

int argc;

90

char **environ;

91

int envc;

92

87

bool disabled;

93

88

struct plugin *next;

94

89

} plugin;

103

98

/* Create a new plugin */

104

99

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

105

100

if (new_plugin == NULL){

106

return NULL;

107

}

108

char *copy_name = NULL;

109

if(name != NULL){

110

copy_name = strdup(name);

111

}

112

if(copy_name == NULL){

113

return NULL;

114

}

115

116

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

117

.argc = 1,

118

.envc = 0,

119

.disabled = false,

120

.next = *plugin_list };

121

101

perror("malloc");

102

exit(EXIT_FAILURE);

103

}

104

new_plugin->name = name;

122

105

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

123

106

if (new_plugin->argv == NULL){

124

free(copy_name);

125

free(new_plugin);

126

return NULL;

107

perror("malloc");

108

exit(EXIT_FAILURE);

127

109

}

128

new_plugin->argv[0] = copy_name;

110

new_plugin->argv[0] = name;

129

111

new_plugin->argv[1] = NULL;

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;

112

new_plugin->argc = 1;

113

new_plugin->disabled = false;

114

new_plugin->next = *plugin_list;

139

115

/* Append the new plugin to the list */

140

116

*plugin_list = new_plugin;

141

117

return new_plugin;

142

118

}

143

119

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

120

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

121

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

122

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

123

if (p->argv == NULL){

124

perror("malloc");

125

exit(EXIT_FAILURE);

126

}

127

p->argc++;

128

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

129

}

183

130

184

131

/*

185

132

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

197

144

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

198

145

}

199

146

147

const char *argp_program_version = "plugbasedclient 0.9";

148

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

149

200

150

process *process_list = NULL;

201

151

202

152

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

220

170

proc->completed = true;

221

171

}

222

172

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; plugin_list != NULL; plugin_list = next){

261

next = plugin_list->next;

262

free(plugin_list->name);

263

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

264

free(*arg);

265

}

266

free(plugin_list->argv);

267

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

268

free(*env);

269

}

270

free(plugin_list->environ);

271

free(plugin_list);

272

}

273

}

274

275

173

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

276

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

277

const char *argfile = ARGFILE;

278

FILE *conffp;

174

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

279

175

size_t d_name_len;

280

176

DIR *dir = NULL;

281

177

struct dirent *dirst;

289

185

struct sigaction old_sigchld_action;

290

186

struct sigaction sigchld_action = { .sa_handler = handle_sigchld,

291

187

.sa_flags = SA_NOCLDSTOP };

292

char **custom_argv = NULL;

293

int custom_argc = 0;

188

char *plus_options = NULL;

189

char **plus_argv = NULL;

294

190

295

191

/* Establish a signal handler */

296

192

sigemptyset(&sigchld_action.sa_mask);

297

193

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

298

if(ret == -1){

194

if(ret < 0){

299

195

perror("sigaddset");

300

exitstatus = EXIT_FAILURE;

301

goto fallback;

196

exit(EXIT_FAILURE);

302

197

}

303

198

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

304

if(ret == -1){

199

if(ret < 0){

305

200

perror("sigaction");

306

exitstatus = EXIT_FAILURE;

307

goto fallback;

201

exit(EXIT_FAILURE);

308

202

}

309

203

310

204

/* The options we understand. */

312

206

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

313

207

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

314

208

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

315

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

316

.arg = "VAR=value",

317

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

318

209

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

319

210

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

320

211

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

321

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

322

.arg = "PLUGIN:ENV=value",

323

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

324

212

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

325

213

.arg = "PLUGIN",

326

214

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

345

233

switch (key) {

346

234

case 'g':

347

235

if (arg != NULL){

348

char *p;

349

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

350

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

351

continue;

352

}

353

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

354

perror("add_argument");

355

return ARGP_ERR_UNKNOWN;

356

}

357

}

358

}

359

break;

360

case 'e':

361

if(arg == NULL){

362

break;

363

}

364

{

365

char *envdef = strdup(arg);

366

if(envdef == NULL){

367

break;

368

}

369

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

370

perror("add_environment");

371

}

236

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

237

do{

238

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

239

p = strtok(NULL, ",");

240

} while (p != NULL);

372

241

}

373

242

break;

374

243

case 'o':

375

244

if (arg != NULL){

376

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

377

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

378

break;

379

}

380

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

381

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

382

break;

383

}

384

if(opt != NULL){

385

char *p;

386

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

387

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

388

continue;

389

}

390

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

391

perror("add_argument");

392

return ARGP_ERR_UNKNOWN;

393

}

394

}

395

}

396

}

397

break;

398

case 'f':

399

if(arg == NULL){

400

break;

401

}

402

{

403

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

404

if(envdef == NULL){

405

break;

406

}

407

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

408

if(p_name == NULL){

409

break;

410

}

411

envdef++;

412

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

413

perror("add_environment");

245

char *name = strtok(arg, ":");

246

char *p = strtok(NULL, ":");

247

if(p != NULL){

248

p = strtok(p, ",");

249

do{

250

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

251

p = strtok(NULL, ",");

252

} while (p != NULL);

414

253

}

415

254

}

416

255

break;

417

256

case 'd':

418

257

if (arg != NULL){

419

plugin *p = getplugin(arg, plugins);

420

if(p == NULL){

421

return ARGP_ERR_UNKNOWN;

422

}

423

p->disabled = true;

258

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

424

259

}

425

260

break;

426

261

case 128:

436

271

debug = true;

437

272

break;

438

273

case ARGP_KEY_ARG:

439

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

274

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

275

argp_usage (state);

276

}

277

plus_options = arg;

440

278

break;

441

279

case ARGP_KEY_END:

442

280

break;

454

292

455

293

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

456

294

if (ret == ARGP_ERR_UNKNOWN){

457

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

295

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

458

296

exitstatus = EXIT_FAILURE;

459

goto fallback;

297

goto end;

460

298

}

461

462

conffp = fopen(argfile, "r");

463

if(conffp != NULL){

464

char *org_line = NULL;

465

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

466

size_t size = 0;

467

ssize_t sret;

468

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

469

const char comment_delim[] = "#";

470

471

while(true){

472

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

473

if(sret == -1){

474

break;

475

}

476

477

line = org_line;

478

arg = strsep(&line, comment_delim);

479

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

480

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

481

continue;

482

}

483

new_arg = strdup(p);

484

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

485

if (custom_argv == NULL){

486

perror("add_to_argv");

487

exitstatus = EXIT_FAILURE;

488

goto fallback;

489

}

490

}

491

}

492

free(org_line);

493

} else{

494

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

495

not affect opening plugins */

496

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

497

perror("fopen");

299

300

if(plus_options){

301

/* This is a mangled argument in the form of

302

"+--option+--other-option=parameter+--yet-another-option", etc */

303

/* Make new argc and argv vars, and call argp_parse() again. */

304

plus_options++; /* skip the first '+' character */

305

const char delims[] = "+";

306

char *arg;

307

int new_argc = 1;

308

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

309

if(plus_argv == NULL){

310

perror("malloc");

498

311

exitstatus = EXIT_FAILURE;

499

goto fallback;

500

}

501

}

502

503

if(custom_argv != NULL){

504

custom_argv[0] = argv[0];

505

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

312

goto end;

313

}

314

plus_argv[0] = argv[0];

315

plus_argv[1] = NULL;

316

arg = strtok(plus_options, delims); /* Get first argument */

317

while(arg != NULL){

318

new_argc++;

319

plus_argv = realloc(plus_argv, sizeof(char *)

320

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

321

if(plus_argv == NULL){

322

perror("realloc");

323

exitstatus = EXIT_FAILURE;

324

goto end;

325

}

326

plus_argv[new_argc-1] = arg;

327

plus_argv[new_argc] = NULL;

328

arg = strtok(NULL, delims); /* Get next argument */

329

}

330

ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);

506

331

if (ret == ARGP_ERR_UNKNOWN){

507

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

332

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

508

333

exitstatus = EXIT_FAILURE;

509

goto fallback;

334

goto end;

510

335

}

511

336

}

512

337

517

342

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

518

343

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

519

344

}

520

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

521

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

522

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

523

}

524

345

}

525

346

}

526

347

538

359

if(dir == NULL){

539

360

perror("Could not open plugin dir");

540

361

exitstatus = EXIT_FAILURE;

541

goto fallback;

362

goto end;

542

363

}

543

364

544

365

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

549

370

if(ret < 0){

550

371

perror("set_cloexec_flag");

551

372

exitstatus = EXIT_FAILURE;

552

goto fallback;

373

goto end;

553

374

}

554

375

}

555

376

}

564

385

if (errno == EBADF){

565

386

perror("readdir");

566

387

exitstatus = EXIT_FAILURE;

567

goto fallback;

388

goto end;

568

389

}

569

390

break;

570

391

}

615

436

continue;

616

437

}

617

438

}

618

619

char *filename;

620

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

621

if(ret < 0){

622

perror("asprintf");

623

continue;

439

440

char *filename = malloc(d_name_len + strlen(plugindir) + 2);

441

if (filename == NULL){

442

perror("malloc");

443

exitstatus = EXIT_FAILURE;

444

goto end;

624

445

}

446

strcpy(filename, plugindir); /* Spurious warning */

447

strcat(filename, "/"); /* Spurious warning */

448

strcat(filename, dirst->d_name); /* Spurious warning */

625

449

626

450

ret = stat(filename, &st);

627

451

if (ret == -1){

628

452

perror("stat");

629

free(filename);

630

continue;

453

exitstatus = EXIT_FAILURE;

454

goto end;

631

455

}

632

456

633

457

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

638

462

free(filename);

639

463

continue;

640

464

}

641

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

642

if(p == NULL){

643

perror("getplugin");

644

free(filename);

645

continue;

646

}

647

if(p->disabled){

465

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

648

466

if(debug){

649

467

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

650

468

dirst->d_name);

652

470

free(filename);

653

471

continue;

654

472

}

473

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

655

474

{

656

475

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

657

476

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

658

if(g != NULL){

659

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

660

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

661

perror("add_argument");

662

}

663

}

664

/* Add global environment variables */

665

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

666

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

667

perror("add_environment");

668

}

669

}

670

}

671

}

672

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

673

using execve and need to duplicate the environment from this

674

process, too. */

675

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

676

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

677

char *copy = strdup(*e);

678

if(copy == NULL){

679

perror("strdup");

680

continue;

681

}

682

if(not add_environment(p, copy)){

683

perror("add_environment");

684

}

685

}

686

}

687

477

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

478

addargument(p, *a);

479

}

480

}

688

481

int pipefd[2];

689

482

ret = pipe(pipefd);

690

483

if (ret == -1){

691

484

perror("pipe");

692

485

exitstatus = EXIT_FAILURE;

693

goto fallback;

486

goto end;

694

487

}

695

488

ret = set_cloexec_flag(pipefd[0]);

696

489

if(ret < 0){

697

490

perror("set_cloexec_flag");

698

491

exitstatus = EXIT_FAILURE;

699

goto fallback;

492

goto end;

700

493

}

701

494

ret = set_cloexec_flag(pipefd[1]);

702

495

if(ret < 0){

703

496

perror("set_cloexec_flag");

704

497

exitstatus = EXIT_FAILURE;

705

goto fallback;

498

goto end;

706

499

}

707

500

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

708

501

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

709

502

if(ret < 0){

710

503

perror("sigprocmask");

711

504

exitstatus = EXIT_FAILURE;

712

goto fallback;

505

goto end;

713

506

}

714

507

// Starting a new process to be watched

715

508

pid_t pid = fork();

716

if(pid == -1){

717

perror("fork");

718

exitstatus = EXIT_FAILURE;

719

goto fallback;

720

}

721

509

if(pid == 0){

722

510

/* this is the child process */

723

511

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

742

530

above and must now close it manually here. */

743

531

closedir(dir);

744

532

}

745

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

746

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

747

perror("execv");

748

_exit(EXIT_FAILURE);

749

}

750

} else {

751

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

752

perror("execve");

753

_exit(EXIT_FAILURE);

754

}

533

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

534

perror("execv");

535

_exit(EXIT_FAILURE);

755

536

}

756

537

/* no return */

757

538

}

766

547

perror("sigprocmask");

767

548

}

768

549

exitstatus = EXIT_FAILURE;

769

goto fallback;

550

goto end;

770

551

}

771

552

772

553

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

780

561

if(ret < 0){

781

562

perror("sigprocmask");

782

563

exitstatus = EXIT_FAILURE;

783

goto fallback;

564

goto end;

784

565

}

785

566

786

567

FD_SET(new_process->fd, &rfds_all);

791

572

792

573

}

793

574

794

free_plugin_list(plugin_list);

575

/* Free the plugin list */

576

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

577

next = plugin_list->next;

578

free(plugin_list->argv);

579

free(plugin_list);

580

}

795

581

796

582

closedir(dir);

797

583

dir = NULL;

798

584

799

585

if (process_list == NULL){

800

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

801

" directory?\n");

802

process_list = NULL;

586

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

587

exitstatus = EXIT_FAILURE;

588

goto end;

803

589

}

804

590

while(process_list){

805

591

fd_set rfds = rfds_all;

807

593

if (select_ret == -1){

808

594

perror("select");

809

595

exitstatus = EXIT_FAILURE;

810

goto fallback;

596

goto end;

811

597

}

812

598

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

813

599

from one of them */

820

606

/* Bad exit by plugin */

821

607

if(debug){

822

608

if(WIFEXITED(proc->status)){

823

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

824

(unsigned int) (proc->pid),

825

WEXITSTATUS(proc->status));

609

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

610

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

826

611

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

827

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

828

(unsigned int) (proc->pid),

829

WTERMSIG(proc->status));

612

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

613

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

830

614

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

831

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

832

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

615

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

833

616

}

834

617

}

835

618

/* Remove the plugin */

839

622

if(ret < 0){

840

623

perror("sigprocmask");

841

624

exitstatus = EXIT_FAILURE;

842

goto fallback;

625

goto end;

843

626

}

844

627

/* Delete this process entry from the list */

845

628

if(process_list == proc){

868

651

break;

869

652

}

870

653

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

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;

654

for(size_t written = 0; written < proc->buffer_length;

655

written += (size_t)ret){

656

ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,

657

proc->buffer + written,

658

proc->buffer_length

659

- written));

660

if(ret < 0){

661

perror("write");

662

exitstatus = EXIT_FAILURE;

663

goto end;

664

}

876

665

}

877

goto fallback;

666

goto end;

878

667

}

879

668

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

880

669

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

888

677

if (proc->buffer == NULL){

889

678

perror("malloc");

890

679

exitstatus = EXIT_FAILURE;

891

goto fallback;

680

goto end;

892

681

}

893

682

proc->buffer_size += BUFFER_SIZE;

894

683

}

907

696

}

908

697

}

909

698

}

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

}

699

if(process_list == NULL){

700

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

701

exitstatus = EXIT_FAILURE;

924

702

}

925

703

704

end:

926

705

/* Restore old signal handler */

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);

706

sigaction(SIGCHLD, &old_sigchld_action, NULL);

707

708

free(plus_argv);

709

710

/* Free the plugin list */

711

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

712

next = plugin_list->next;

713

free(plugin_list->argv);

714

free(plugin_list);

715

}

940

716

941

717

if(dir != NULL){

942

718

closedir(dir);