/mandos/release : revision 24.1.35

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";

69

const char *argp_program_version = "plugbasedclient 1.0";

70

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

71

72

struct process;

87

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

88

char **argv;

89

int argc;

90

char **environ;

91

int envc;

92

90

bool disabled;

93

91

struct plugin *next;

94

92

} plugin;

103

101

/* Create a new plugin */

104

102

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

105

103

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

104

perror("malloc");

105

exit(EXIT_FAILURE);

106

}

107

new_plugin->name = name;

122

108

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

123

109

if (new_plugin->argv == NULL){

124

free(copy_name);

125

free(new_plugin);

126

return NULL;

110

perror("malloc");

111

exit(EXIT_FAILURE);

127

112

}

128

new_plugin->argv[0] = copy_name;

113

new_plugin->argv[0] = name;

129

114

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;

115

new_plugin->argc = 1;

116

new_plugin->disabled = false;

117

new_plugin->next = *plugin_list;

139

118

/* Append the new plugin to the list */

140

119

*plugin_list = new_plugin;

141

120

return new_plugin;

142

121

}

143

122

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

123

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

124

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

125

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

126

if (p->argv == NULL){

127

perror("malloc");

128

exit(EXIT_FAILURE);

129

}

130

p->argc++;

131

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

132

}

183

133

184

134

/*

185

135

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

199

149

200

150

process *process_list = NULL;

201

151

202

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

152

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

203

153

status. */

204

154

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

205

155

process *proc = process_list;

206

while(true){

207

int status;

208

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

209

if(pid == 0){

210

break;

211

}

212

if(pid == -1){

213

if (errno != ECHILD){

214

perror("waitpid");

215

}

216

return;

217

}

218

219

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

220

proc = proc->next;

221

}

222

if(proc == NULL){

223

/* Process not found in process list */

224

continue;

225

}

226

proc->status = status;

227

proc->completed = true;

228

}

229

}

230

231

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

232

ssize_t ret;

233

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

234

length--;

235

}

236

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

237

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

238

length - written));

239

if(ret < 0){

240

return false;

241

}

242

}

243

return true;

244

}

245

246

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

247

if (argv == NULL){

248

*argc = 1;

249

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

250

if(argv == NULL){

251

return NULL;

252

}

253

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

254

argv[1] = NULL;

255

}

256

*argc += 1;

257

argv = realloc(argv, sizeof(char *)

258

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

259

if(argv == NULL){

260

return NULL;

261

}

262

argv[*argc-1] = arg;

263

argv[*argc] = NULL;

264

return argv;

265

}

266

267

static void free_plugin_list(plugin *plugin_list){

268

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

269

next = plugin_list->next;

270

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

271

free(*arg);

272

}

273

free(plugin_list->argv);

274

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

275

free(*env);

276

}

277

free(plugin_list->environ);

278

free(plugin_list);

279

}

156

int status;

157

pid_t pid = wait(&status);

158

if(pid == -1){

159

perror("wait");

160

return;

161

}

162

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

163

proc = proc->next;

164

}

165

if(proc == NULL){

166

/* Process not found in process list */

167

return;

168

}

169

proc->status = status;

170

proc->completed = true;

280

171

}

281

172

282

173

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

283

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

284

const char *argfile = ARGFILE;

285

FILE *conffp;

174

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

286

175

size_t d_name_len;

287

176

DIR *dir = NULL;

288

177

struct dirent *dirst;

296

185

struct sigaction old_sigchld_action;

297

186

struct sigaction sigchld_action = { .sa_handler = handle_sigchld,

298

187

.sa_flags = SA_NOCLDSTOP };

299

char **custom_argv = NULL;

300

int custom_argc = 0;

188

char *plus_options = NULL;

189

char **plus_argv = NULL;

301

190

302

191

/* Establish a signal handler */

303

192

sigemptyset(&sigchld_action.sa_mask);

304

193

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

305

if(ret == -1){

194

if(ret < 0){

306

195

perror("sigaddset");

307

exitstatus = EXIT_FAILURE;

308

goto fallback;

196

exit(EXIT_FAILURE);

309

197

}

310

198

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

311

if(ret == -1){

199

if(ret < 0){

312

200

perror("sigaction");

313

exitstatus = EXIT_FAILURE;

314

goto fallback;

201

exit(EXIT_FAILURE);

315

202

}

316

203

317

204

/* The options we understand. */

319

206

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

320

207

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

321

208

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

322

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

323

.arg = "VAR=value",

324

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

325

209

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

326

210

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

327

211

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

328

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

329

.arg = "PLUGIN:ENV=value",

330

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

331

212

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

332

213

.arg = "PLUGIN",

333

214

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

352

233

switch (key) {

353

234

case 'g':

354

235

if (arg != NULL){

355

char *p;

356

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

357

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

358

continue;

359

}

360

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

361

perror("add_argument");

362

return ARGP_ERR_UNKNOWN;

363

}

364

}

365

}

366

break;

367

case 'e':

368

if(arg == NULL){

369

break;

370

}

371

{

372

char *envdef = strdup(arg);

373

if(envdef == NULL){

374

break;

375

}

376

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

377

perror("add_environment");

378

}

236

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

237

do{

238

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

239

p = strtok(NULL, ",");

240

} while (p != NULL);

379

241

}

380

242

break;

381

243

case 'o':

382

244

if (arg != NULL){

383

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

384

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

385

break;

386

}

387

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

388

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

389

break;

390

}

391

if(opt != NULL){

392

char *p;

393

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

394

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

395

continue;

396

}

397

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

398

perror("add_argument");

399

return ARGP_ERR_UNKNOWN;

400

}

401

}

402

}

403

}

404

break;

405

case 'f':

406

if(arg == NULL){

407

break;

408

}

409

{

410

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

411

if(envdef == NULL){

412

break;

413

}

414

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

415

if(p_name == NULL){

416

break;

417

}

418

envdef++;

419

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

420

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);

421

253

}

422

254

}

423

255

break;

424

256

case 'd':

425

257

if (arg != NULL){

426

plugin *p = getplugin(arg, plugins);

427

if(p == NULL){

428

return ARGP_ERR_UNKNOWN;

429

}

430

p->disabled = true;

258

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

431

259

}

432

260

break;

433

261

case 128:

443

271

debug = true;

444

272

break;

445

273

case ARGP_KEY_ARG:

446

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;

447

278

break;

448

279

case ARGP_KEY_END:

449

280

break;

461

292

462

293

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

463

294

if (ret == ARGP_ERR_UNKNOWN){

464

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

295

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

465

296

exitstatus = EXIT_FAILURE;

466

goto fallback;

297

goto end;

467

298

}

468

469

conffp = fopen(argfile, "r");

470

if(conffp != NULL){

471

char *org_line = NULL;

472

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

473

size_t size = 0;

474

ssize_t sret;

475

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

476

const char comment_delim[] = "#";

477

478

while(true){

479

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

480

if(sret == -1){

481

break;

482

}

483

484

line = org_line;

485

arg = strsep(&line, comment_delim);

486

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

487

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

488

continue;

489

}

490

new_arg = strdup(p);

491

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

492

if (custom_argv == NULL){

493

perror("add_to_argv");

494

exitstatus = EXIT_FAILURE;

495

goto fallback;

496

}

497

}

498

}

499

free(org_line);

500

} else{

501

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

502

not affect opening plugins */

503

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

504

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");

505

311

exitstatus = EXIT_FAILURE;

506

goto fallback;

507

}

508

}

509

510

if(custom_argv != NULL){

511

custom_argv[0] = argv[0];

512

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);

513

331

if (ret == ARGP_ERR_UNKNOWN){

514

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

332

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

515

333

exitstatus = EXIT_FAILURE;

516

goto fallback;

334

goto end;

517

335

}

518

336

}

519

337

524

342

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

525

343

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

526

344

}

527

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

528

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

529

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

530

}

531

345

}

532

346

}

533

347

545

359

if(dir == NULL){

546

360

perror("Could not open plugin dir");

547

361

exitstatus = EXIT_FAILURE;

548

goto fallback;

362

goto end;

549

363

}

550

364

551

365

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

556

370

if(ret < 0){

557

371

perror("set_cloexec_flag");

558

372

exitstatus = EXIT_FAILURE;

559

goto fallback;

373

goto end;

560

374

}

561

375

}

562

376

}

571

385

if (errno == EBADF){

572

386

perror("readdir");

573

387

exitstatus = EXIT_FAILURE;

574

goto fallback;

388

goto end;

575

389

}

576

390

break;

577

391

}

622

436

continue;

623

437

}

624

438

}

625

626

char *filename;

627

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

628

if(ret < 0){

629

perror("asprintf");

630

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;

631

445

}

446

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

447

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

448

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

632

449

633

450

ret = stat(filename, &st);

634

451

if (ret == -1){

635

452

perror("stat");

636

free(filename);

637

continue;

453

exitstatus = EXIT_FAILURE;

454

goto end;

638

455

}

639

456

640

457

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

645

462

free(filename);

646

463

continue;

647

464

}

648

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

649

if(p == NULL){

650

perror("getplugin");

651

free(filename);

652

continue;

653

}

654

if(p->disabled){

465

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

655

466

if(debug){

656

467

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

657

468

dirst->d_name);

659

470

free(filename);

660

471

continue;

661

472

}

473

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

662

474

{

663

475

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

664

476

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

665

if(g != NULL){

666

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

667

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

668

perror("add_argument");

669

}

670

}

671

/* Add global environment variables */

672

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

673

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

674

perror("add_environment");

675

}

676

}

677

}

678

}

679

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

680

using execve and need to duplicate the environment from this

681

process, too. */

682

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

683

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

684

char *copy = strdup(*e);

685

if(copy == NULL){

686

perror("strdup");

687

continue;

688

}

689

if(not add_environment(p, copy)){

690

perror("add_environment");

691

}

692

}

693

}

694

695

int pipefd[2];

477

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

478

addargument(p, *a);

479

}

480

}

481

int pipefd[2];

696

482

ret = pipe(pipefd);

697

483

if (ret == -1){

698

484

perror("pipe");

699

485

exitstatus = EXIT_FAILURE;

700

goto fallback;

486

goto end;

701

487

}

702

488

ret = set_cloexec_flag(pipefd[0]);

703

489

if(ret < 0){

704

490

perror("set_cloexec_flag");

705

491

exitstatus = EXIT_FAILURE;

706

goto fallback;

492

goto end;

707

493

}

708

494

ret = set_cloexec_flag(pipefd[1]);

709

495

if(ret < 0){

710

496

perror("set_cloexec_flag");

711

497

exitstatus = EXIT_FAILURE;

712

goto fallback;

498

goto end;

713

499

}

714

500

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

715

501

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

716

502

if(ret < 0){

717

503

perror("sigprocmask");

718

504

exitstatus = EXIT_FAILURE;

719

goto fallback;

505

goto end;

720

506

}

721

507

// Starting a new process to be watched

722

508

pid_t pid = fork();

723

if(pid == -1){

724

perror("fork");

725

exitstatus = EXIT_FAILURE;

726

goto fallback;

727

}

728

509

if(pid == 0){

729

510

/* this is the child process */

730

511

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

749

530

above and must now close it manually here. */

750

531

closedir(dir);

751

532

}

752

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

753

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

754

perror("execv");

755

_exit(EXIT_FAILURE);

756

}

757

} else {

758

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

759

perror("execve");

760

_exit(EXIT_FAILURE);

761

}

533

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

534

perror("execv");

535

_exit(EXIT_FAILURE);

762

536

}

763

537

/* no return */

764

538

}

773

547

perror("sigprocmask");

774

548

}

775

549

exitstatus = EXIT_FAILURE;

776

goto fallback;

550

goto end;

777

551

}

778

552

779

553

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

787

561

if(ret < 0){

788

562

perror("sigprocmask");

789

563

exitstatus = EXIT_FAILURE;

790

goto fallback;

564

goto end;

791

565

}

792

566

793

567

FD_SET(new_process->fd, &rfds_all);

798

572

799

573

}

800

574

801

free_plugin_list(plugin_list);

802

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

}

803

581

804

582

closedir(dir);

805

583

dir = NULL;

806

584

807

585

if (process_list == NULL){

808

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

809

" directory?\n");

810

process_list = NULL;

586

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

587

exitstatus = EXIT_FAILURE;

588

goto end;

811

589

}

812

590

while(process_list){

813

591

fd_set rfds = rfds_all;

815

593

if (select_ret == -1){

816

594

perror("select");

817

595

exitstatus = EXIT_FAILURE;

818

goto fallback;

596

goto end;

819

597

}

820

598

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

821

599

from one of them */

828

606

/* Bad exit by plugin */

829

607

if(debug){

830

608

if(WIFEXITED(proc->status)){

831

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

832

(unsigned int) (proc->pid),

833

WEXITSTATUS(proc->status));

609

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

610

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

834

611

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

835

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

836

(unsigned int) (proc->pid),

837

WTERMSIG(proc->status));

612

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

613

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

838

614

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

839

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

840

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

615

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

841

616

}

842

617

}

843

618

/* Remove the plugin */

847

622

if(ret < 0){

848

623

perror("sigprocmask");

849

624

exitstatus = EXIT_FAILURE;

850

goto fallback;

625

goto end;

851

626

}

852

627

/* Delete this process entry from the list */

853

628

if(process_list == proc){

876

651

break;

877

652

}

878

653

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

879

880

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

881

if(not bret){

882

perror("print_out_password");

883

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

}

884

665

}

885

goto fallback;

666

goto end;

886

667

}

887

668

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

888

669

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

896

677

if (proc->buffer == NULL){

897

678

perror("malloc");

898

679

exitstatus = EXIT_FAILURE;

899

goto fallback;

680

goto end;

900

681

}

901

682

proc->buffer_size += BUFFER_SIZE;

902

683

}

915

696

}

916

697

}

917

698

}

918

919

920

fallback:

921

922

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

923

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

924

bool bret;

925

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

926

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

927

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

928

if(not bret){

929

perror("print_out_password");

930

exitstatus = EXIT_FAILURE;

931

}

699

if(process_list == NULL){

700

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

701

exitstatus = EXIT_FAILURE;

932

702

}

933

703

704

end:

934

705

/* Restore old signal handler */

935

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

936

if(ret == -1){

937

perror("sigaction");

938

exitstatus = EXIT_FAILURE;

939

}

940

941

if(custom_argv != NULL){

942

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

943

free(*arg);

944

}

945

free(custom_argv);

946

}

947

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

}

948

716

949

717

if(dir != NULL){

950

718

closedir(dir);