/mandos/trunk : revision 57

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

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

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 != 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

274

173

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

275

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

276

const char *argfile = ARGFILE;

277

FILE *conffp;

174

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

278

175

size_t d_name_len;

279

176

DIR *dir = NULL;

280

177

struct dirent *dirst;

288

185

struct sigaction old_sigchld_action;

289

186

struct sigaction sigchld_action = { .sa_handler = handle_sigchld,

290

187

.sa_flags = SA_NOCLDSTOP };

291

char **custom_argv = NULL;

292

int custom_argc = 0;

188

char *plus_options = NULL;

189

char **plus_argv = NULL;

293

190

294

191

/* Establish a signal handler */

295

192

sigemptyset(&sigchld_action.sa_mask);

296

193

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

297

if(ret == -1){

194

if(ret < 0){

298

195

perror("sigaddset");

299

exitstatus = EXIT_FAILURE;

300

goto fallback;

196

exit(EXIT_FAILURE);

301

197

}

302

198

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

303

if(ret == -1){

199

if(ret < 0){

304

200

perror("sigaction");

305

exitstatus = EXIT_FAILURE;

306

goto fallback;

201

exit(EXIT_FAILURE);

307

202

}

308

203

309

204

/* The options we understand. */

311

206

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

312

207

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

313

208

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

314

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

315

.arg = "VAR=value",

316

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

317

209

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

318

210

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

319

211

.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" },

323

212

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

324

213

.arg = "PLUGIN",

325

214

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

344

233

switch (key) {

345

234

case 'g':

346

235

if (arg != 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

}

236

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

237

do{

238

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

239

p = strtok(NULL, ",");

240

} while (p != NULL);

371

241

}

372

242

break;

373

243

case 'o':

374

244

if (arg != 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");

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);

413

253

}

414

254

}

415

255

break;

416

256

case 'd':

417

257

if (arg != NULL){

418

plugin *p = getplugin(arg, plugins);

419

if(p == NULL){

420

return ARGP_ERR_UNKNOWN;

421

}

422

p->disabled = true;

258

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

423

259

}

424

260

break;

425

261

case 128:

435

271

debug = true;

436

272

break;

437

273

case ARGP_KEY_ARG:

438

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;

439

278

break;

440

279

case ARGP_KEY_END:

441

280

break;

453

292

454

293

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

455

294

if (ret == ARGP_ERR_UNKNOWN){

456

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

295

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

457

296

exitstatus = EXIT_FAILURE;

458

goto fallback;

297

goto end;

459

298

}

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");

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");

497

311

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);

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);

505

331

if (ret == ARGP_ERR_UNKNOWN){

506

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

332

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

507

333

exitstatus = EXIT_FAILURE;

508

goto fallback;

334

goto end;

509

335

}

510

336

}

511

337

516

342

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

517

343

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

518

344

}

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

}

523

345

}

524

346

}

525

347

537

359

if(dir == NULL){

538

360

perror("Could not open plugin dir");

539

361

exitstatus = EXIT_FAILURE;

540

goto fallback;

362

goto end;

541

363

}

542

364

543

365

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

548

370

if(ret < 0){

549

371

perror("set_cloexec_flag");

550

372

exitstatus = EXIT_FAILURE;

551

goto fallback;

373

goto end;

552

374

}

553

375

}

554

376

}

563

385

if (errno == EBADF){

564

386

perror("readdir");

565

387

exitstatus = EXIT_FAILURE;

566

goto fallback;

388

goto end;

567

389

}

568

390

break;

569

391

}

614

436

continue;

615

437

}

616

438

}

617

618

char *filename;

619

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

620

if(ret < 0){

621

perror("asprintf");

622

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;

623

445

}

446

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

447

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

448

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

624

449

625

450

ret = stat(filename, &st);

626

451

if (ret == -1){

627

452

perror("stat");

628

free(filename);

629

continue;

453

exitstatus = EXIT_FAILURE;

454

goto end;

630

455

}

631

456

632

457

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

637

462

free(filename);

638

463

continue;

639

464

}

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){

465

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

647

466

if(debug){

648

467

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

649

468

dirst->d_name);

651

470

free(filename);

652

471

continue;

653

472

}

473

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

654

474

{

655

475

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

656

476

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

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];

477

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

478

addargument(p, *a);

479

}

480

}

481

int pipefd[2];

688

482

ret = pipe(pipefd);

689

483

if (ret == -1){

690

484

perror("pipe");

691

485

exitstatus = EXIT_FAILURE;

692

goto fallback;

486

goto end;

693

487

}

694

488

ret = set_cloexec_flag(pipefd[0]);

695

489

if(ret < 0){

696

490

perror("set_cloexec_flag");

697

491

exitstatus = EXIT_FAILURE;

698

goto fallback;

492

goto end;

699

493

}

700

494

ret = set_cloexec_flag(pipefd[1]);

701

495

if(ret < 0){

702

496

perror("set_cloexec_flag");

703

497

exitstatus = EXIT_FAILURE;

704

goto fallback;

498

goto end;

705

499

}

706

500

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

707

501

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

708

502

if(ret < 0){

709

503

perror("sigprocmask");

710

504

exitstatus = EXIT_FAILURE;

711

goto fallback;

505

goto end;

712

506

}

713

507

// Starting a new process to be watched

714

508

pid_t pid = fork();

715

if(pid == -1){

716

perror("fork");

717

exitstatus = EXIT_FAILURE;

718

goto fallback;

719

}

720

509

if(pid == 0){

721

510

/* this is the child process */

722

511

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

741

530

above and must now close it manually here. */

742

531

closedir(dir);

743

532

}

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

}

533

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

534

perror("execv");

535

_exit(EXIT_FAILURE);

754

536

}

755

537

/* no return */

756

538

}

765

547

perror("sigprocmask");

766

548

}

767

549

exitstatus = EXIT_FAILURE;

768

goto fallback;

550

goto end;

769

551

}

770

552

771

553

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

779

561

if(ret < 0){

780

562

perror("sigprocmask");

781

563

exitstatus = EXIT_FAILURE;

782

goto fallback;

564

goto end;

783

565

}

784

566

785

567

FD_SET(new_process->fd, &rfds_all);

790

572

791

573

}

792

574

793

free_plugin_list(plugin_list);

794

plugin_list = NULL;

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);