/mandos/trunk : revision 105

65

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

66

67

#define BUFFER_SIZE 256

68

69

#define PDIR "/lib/mandos/plugins.d"

70

#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"

68

#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"

71

69

72

70

const char *argp_program_version = "plugin-runner 1.0";

73

71

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

74

72

75

struct plugin;

76

77

typedef struct plugin{

78

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

79

char **argv;

80

int argc;

81

char **environ;

82

int envc;

83

bool disabled;

84

85

/* Variables used for running processes*/

73

struct process;

74

75

typedef struct process{

86

76

pid_t pid;

87

77

int fd;

88

78

char *buffer;

91

81

bool eof;

92

82

volatile bool completed;

93

83

volatile int status;

84

struct process *next;

85

} process;

86

87

typedef struct plugin{

88

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

89

char **argv;

90

int argc;

91

char **environ;

92

int envc;

93

bool disabled;

94

struct plugin *next;

95

} plugin;

96

97

static plugin *plugin_list = NULL;

98

99

/* Gets a existing plugin based on name,

100

or if none is found, creates a new one */

101

static plugin *getplugin(char *name){

102

/* Check for exiting plugin with that name */

103

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

97

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

98

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

104

99

if ((p->name == name)

105

100

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

106

101

return p;

118

113

return NULL;

119

114

}

120

115

}

121

116

122

117

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

123

118

.argc = 1,

119

.envc = 0,

124

120

.disabled = false,

125

.next = plugin_list };

121

.next = *plugin_list };

126

122

127

123

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

128

124

if (new_plugin->argv == NULL){

132

128

}

133

129

new_plugin->argv[0] = copy_name;

134

130

new_plugin->argv[1] = NULL;

135

131

136

132

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

137

133

if(new_plugin->environ == NULL){

138

134

free(copy_name);

141

137

return NULL;

142

138

}

143

139

new_plugin->environ[0] = NULL;

144

145

140

/* Append the new plugin to the list */

146

plugin_list = new_plugin;

141

*plugin_list = new_plugin;

147

142

return new_plugin;

148

143

}

149

144

179

174

}

180

175

181

176

/* Add to a plugin's environment */

182

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

177

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

183

178

if(p == NULL){

184

179

return false;

185

180

}

186

/* namelen = length of name of environment variable */

187

size_t namelen = (size_t)(strchrnul(def, '=') - def);

188

/* Search for this environment variable */

189

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

190

if(strncmp(*e, def, namelen+1) == 0){

191

/* It already exists */

192

if(replace){

193

char *new = realloc(*e, strlen(def));

194

if(new == NULL){

195

return false;

196

}

197

*e = new;

198

strcpy(*e, def);

199

}

200

return true;

201

}

202

}

203

181

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

204

182

}

205

183

184

206

185

/*

207

186

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

208

187

* Descriptor Flags".

219

198

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

220

199

}

221

200

201

process *process_list = NULL;

222

202

223

203

/* Mark processes as completed when they exit, and save their exit

224

204

status. */

225

205

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

226

206

while(true){

227

plugin *proc = plugin_list;

207

process *proc = process_list;

228

208

int status;

229

209

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

230

210

if(pid == 0){

252

232

}

253

233

}

254

234

255

/* Prints out a password to stdout */

256

235

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

257

236

ssize_t ret;

258

237

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

268

247

return true;

269

248

}

270

249

271

/* Removes and free a plugin from the plugin list */

272

static void free_plugin(plugin *plugin_node){

273

274

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

275

free(*arg);

276

}

277

free(plugin_node->argv);

278

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

279

free(*env);

280

}

281

free(plugin_node->environ);

282

free(plugin_node->buffer);

283

284

/* Removes the plugin from the singly-linked list */

285

if(plugin_node == plugin_list){

286

/* First one - simple */

287

plugin_list = plugin_list->next;

288

} else {

289

/* Second one or later */

290

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

291

if(p->next == plugin_node){

292

p->next = plugin_node->next;

293

break;

294

}

250

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

251

if (argv == NULL){

252

*argc = 1;

253

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

254

if(argv == NULL){

255

return NULL;

295

256

}

296

}

297

298

free(plugin_node);

257

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

258

parsing */

259

argv[1] = NULL;

260

}

261

*argc += 1;

262

argv = realloc(argv, sizeof(char *)

263

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

264

if(argv == NULL){

265

return NULL;

266

}

267

argv[*argc-1] = arg;

268

argv[*argc] = NULL;

269

return argv;

299

270

}

300

271

301

static void free_plugin_list(void){

302

while(plugin_list != NULL){

303

free_plugin(plugin_list);

272

static void free_plugin_list(plugin *plugin_list){

273

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

274

next = plugin_list->next;

275

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

276

free(*arg);

277

}

278

free(plugin_list->argv);

279

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

280

free(*env);

281

}

282

free(plugin_list->environ);

283

free(plugin_list);

304

284

}

305

285

}

306

286

307

287

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

308

char *plugindir = NULL;

309

char *argfile = NULL;

288

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

289

const char *argfile = ARGFILE;

310

290

FILE *conffp;

311

291

size_t d_name_len;

312

292

DIR *dir = NULL;

344

324

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

345

325

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

346

326

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

347

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

327

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

348

328

.arg = "VAR=value",

349

329

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

350

330

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

351

331

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

352

332

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

353

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

333

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

354

334

.arg = "PLUGIN:ENV=value",

355

335

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

356

336

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

359

339

{ .name = "plugin-dir", .key = 128,

360

340

.arg = "DIRECTORY",

361

341

.doc = "Specify a different plugin directory", .group = 2 },

362

{ .name = "config-file", .key = 129,

363

.arg = "FILE",

364

.doc = "Specify a different configuration file", .group = 2 },

365

{ .name = "userid", .key = 130,

366

.arg = "ID", .flags = 0,

367

.doc = "User ID the plugins will run as", .group = 3 },

368

{ .name = "groupid", .key = 131,

369

.arg = "ID", .flags = 0,

370

.doc = "Group ID the plugins will run as", .group = 3 },

371

{ .name = "debug", .key = 132,

372

.doc = "Debug mode", .group = 4 },

342

{ .name = "userid", .key = 129,

343

.arg = "ID", .flags = 0,

344

.doc = "User ID the plugins will run as", .group = 2 },

345

{ .name = "groupid", .key = 130,

346

.arg = "ID", .flags = 0,

347

.doc = "Group ID the plugins will run as", .group = 2 },

348

{ .name = "debug", .key = 131,

349

.doc = "Debug mode", .group = 3 },

373

350

{ .name = NULL }

374

351

};

375

352

376

error_t parse_opt (int key, char *arg, __attribute__((unused))

377

struct argp_state *state) {

353

error_t parse_opt (int key, char *arg, struct argp_state *state) {

354

/* Get the INPUT argument from `argp_parse', which we know is a

355

pointer to our plugin list pointer. */

356

plugin **plugins = state->input;

378

357

switch (key) {

379

case 'g': /* --global-options */

358

case 'g':

380

359

if (arg != NULL){

381

360

char *p;

382

361

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

383

362

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

384

363

continue;

385

364

}

386

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

365

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

387

366

perror("add_argument");

388

367

return ARGP_ERR_UNKNOWN;

389

368

}

390

369

}

391

370

}

392

371

break;

393

case 'e': /* --global-env */

372

case 'e':

394

373

if(arg == NULL){

395

374

break;

396

375

}

399

378

if(envdef == NULL){

400

379

break;

401

380

}

402

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

381

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

403

382

perror("add_environment");

404

383

}

405

384

}

406

385

break;

407

case 'o': /* --options-for */

386

case 'o':

408

387

if (arg != NULL){

409

388

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

410

389

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

420

399

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

421

400

continue;

422

401

}

423

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

402

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

424

403

perror("add_argument");

425

404

return ARGP_ERR_UNKNOWN;

426

405

}

428

407

}

429

408

}

430

409

break;

431

case 'f': /* --env-for */

410

case 'f':

432

411

if(arg == NULL){

433

412

break;

434

413

}

442

421

break;

443

422

}

444

423

envdef++;

445

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

424

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

446

425

perror("add_environment");

447

426

}

448

427

}

449

428

break;

450

case 'd': /* --disable */

429

case 'd':

451

430

if (arg != NULL){

452

plugin *p = getplugin(arg);

431

plugin *p = getplugin(arg, plugins);

453

432

if(p == NULL){

454

433

return ARGP_ERR_UNKNOWN;

455

434

}

456

435

p->disabled = true;

457

436

}

458

437

break;

459

case 128: /* --plugin-dir */

460

plugindir = strdup(arg);

461

if(plugindir == NULL){

462

perror("strdup");

463

}

464

break;

465

case 129: /* --config-file */

466

/* This is already done by parse_opt_config_file() */

467

break;

468

case 130: /* --userid */

438

case 128:

439

plugindir = arg;

440

break;

441

case 129:

469

442

uid = (uid_t)strtol(arg, NULL, 10);

470

443

break;

471

case 131: /* --groupid */

444

case 130:

472

445

gid = (gid_t)strtol(arg, NULL, 10);

473

446

break;

474

case 132: /* --debug */

447

case 131:

475

448

debug = true;

476

449

break;

477

450

case ARGP_KEY_ARG:

485

458

return 0;

486

459

}

487

460

488

/* This option parser is the same as parse_opt() above, except it

489

ignores everything but the --config-file option. */

490

error_t parse_opt_config_file (int key, char *arg,

491

__attribute__((unused))

492

struct argp_state *state) {

493

switch (key) {

494

case 'g': /* --global-options */

495

case 'e': /* --global-env */

496

case 'o': /* --options-for */

497

case 'f': /* --env-for */

498

case 'd': /* --disable */

499

case 128: /* --plugin-dir */

500

break;

501

case 129: /* --config-file */

502

argfile = strdup(arg);

503

if(argfile == NULL){

504

perror("strdup");

505

}

506

break;

507

case 130: /* --userid */

508

case 131: /* --groupid */

509

case 132: /* --debug */

510

case ARGP_KEY_ARG:

511

case ARGP_KEY_END:

512

break;

513

default:

514

return ARGP_ERR_UNKNOWN;

515

}

516

return 0;

517

}

461

plugin *plugin_list = NULL;

518

462

519

struct argp argp = { .options = options,

520

.parser = parse_opt_config_file,

521

.args_doc = "",

463

struct argp argp = { .options = options, .parser = parse_opt,

464

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

522

465

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

523

466

524

/* Parse using the parse_opt_config_file in order to get the custom

525

config file location, if any. */

526

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

467

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

527

468

if (ret == ARGP_ERR_UNKNOWN){

528

469

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

529

470

exitstatus = EXIT_FAILURE;

530

471

goto fallback;

531

472

}

532

533

/* Reset to the normal argument parser */

534

argp.parser = parse_opt;

535

536

/* Open the configfile if available */

537

if (argfile == NULL){

538

conffp = fopen(AFILE, "r");

539

} else {

540

conffp = fopen(argfile, "r");

541

}

473

474

conffp = fopen(argfile, "r");

542

475

if(conffp != NULL){

543

476

char *org_line = NULL;

544

477

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

547

480

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

548

481

const char comment_delim[] = "#";

549

482

550

custom_argc = 1;

551

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

552

if(custom_argv == NULL){

553

perror("malloc");

554

exitstatus = EXIT_FAILURE;

555

goto fallback;

556

}

557

custom_argv[0] = argv[0];

558

custom_argv[1] = NULL;

559

560

/* for each line in the config file, strip whitespace and ignore

561

commented text */

562

483

while(true){

563

484

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

564

485

if(sret == -1){

572

493

continue;

573

494

}

574

495

new_arg = strdup(p);

575

if(new_arg == NULL){

576

perror("strdup");

577

exitstatus = EXIT_FAILURE;

578

free(org_line);

579

goto fallback;

580

}

581

582

custom_argc += 1;

583

custom_argv = realloc(custom_argv, sizeof(char *)

584

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

585

if(custom_argv == NULL){

586

perror("realloc");

587

exitstatus = EXIT_FAILURE;

588

free(org_line);

589

goto fallback;

590

}

591

custom_argv[custom_argc-1] = new_arg;

592

custom_argv[custom_argc] = NULL;

496

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

497

if (custom_argv == NULL){

498

perror("add_to_argv");

499

exitstatus = EXIT_FAILURE;

500

goto fallback;

501

}

593

502

}

594

503

}

595

504

free(org_line);

596

} else {

505

} else{

597

506

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

598

507

not affect opening plugins */

599

508

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

602

511

goto fallback;

603

512

}

604

513

}

605

/* If there was any arguments from configuration file,

606

pass them to parser as command arguments */

514

607

515

if(custom_argv != NULL){

608

ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,

609

0, NULL);

516

custom_argv[0] = argv[0];

517

ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,

518

&plugin_list);

610

519

if (ret == ARGP_ERR_UNKNOWN){

611

520

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

612

521

exitstatus = EXIT_FAILURE;

614

523

}

615

524

}

616

525

617

/* Parse actual command line arguments, to let them override the

618

config file */

619

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

620

if (ret == ARGP_ERR_UNKNOWN){

621

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

622

exitstatus = EXIT_FAILURE;

623

goto fallback;

624

}

625

626

526

if(debug){

627

527

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

628

528

fprintf(stderr, "Plugin: %s has %d arguments\n",

637

537

}

638

538

}

639

539

640

/* Strip permissions down to nobody */

641

540

ret = setuid(uid);

642

541

if (ret == -1){

643

542

perror("setuid");

644

}

543

}

544

645

545

setgid(gid);

646

546

if (ret == -1){

647

547

perror("setgid");

648

548

}

649

549

650

if (plugindir == NULL){

651

dir = opendir(PDIR);

652

} else {

653

dir = opendir(plugindir);

654

}

655

550

dir = opendir(plugindir);

656

551

if(dir == NULL){

657

552

perror("Could not open plugin dir");

658

553

exitstatus = EXIT_FAILURE;

674

569

675

570

FD_ZERO(&rfds_all);

676

571

677

/* Read and execute any executable in the plugin directory*/

678

572

while(true){

679

573

dirst = readdir(dir);

680

574

681

/* All directory entries have been processed */

575

// All directory entries have been processed

682

576

if(dirst == NULL){

683

577

if (errno == EBADF){

684

578

perror("readdir");

690

584

691

585

d_name_len = strlen(dirst->d_name);

692

586

693

/* Ignore dotfiles, backup files and other junk */

587

// Ignore dotfiles, backup files and other junk

694

588

{

695

589

bool bad_name = false;

696

590

711

605

break;

712

606

}

713

607

}

608

714

609

if(bad_name){

715

610

continue;

716

611

}

612

717

613

for(const char **suf = bad_suffixes; *suf != NULL; suf++){

718

614

size_t suf_len = strlen(*suf);

719

615

if((d_name_len >= suf_len)

746

642

free(filename);

747

643

continue;

748

644

}

749

750

/* Ignore non-executable files */

645

751

646

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

752

647

if(debug){

753

648

fprintf(stderr, "Ignoring plugin dir entry \"%s\""

756

651

free(filename);

757

652

continue;

758

653

}

759

760

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

654

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

761

655

if(p == NULL){

762

656

perror("getplugin");

763

657

free(filename);

773

667

}

774

668

{

775

669

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

776

plugin *g = getplugin(NULL);

670

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

777

671

if(g != NULL){

778

672

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

779

673

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

782

676

}

783

677

/* Add global environment variables */

784

678

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

785

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

679

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

786

680

perror("add_environment");

787

681

}

788

682

}

793

687

process, too. */

794

688

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

795

689

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

796

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

690

char *copy = strdup(*e);

691

if(copy == NULL){

692

perror("strdup");

693

continue;

694

}

695

if(not add_environment(p, copy)){

797

696

perror("add_environment");

798

697

}

799

698

}

806

705

exitstatus = EXIT_FAILURE;

807

706

goto fallback;

808

707

}

809

/* Ask OS to automatic close the pipe on exec */

810

708

ret = set_cloexec_flag(pipefd[0]);

811

709

if(ret < 0){

812

710

perror("set_cloexec_flag");

826

724

exitstatus = EXIT_FAILURE;

827

725

goto fallback;

828

726

}

829

/* Starting a new process to be watched */

727

// Starting a new process to be watched

830

728

pid_t pid = fork();

831

729

if(pid == -1){

832

730

perror("fork");

870

768

}

871

769

/* no return */

872

770

}

873

/* Parent process */

874

close(pipefd[1]); /* Close unused write end of pipe */

771

/* parent process */

875

772

free(filename);

876

plugin *new_plugin = getplugin(dirst->d_name);

877

if (new_plugin == NULL){

878

perror("getplugin");

773

close(pipefd[1]); /* close unused write end of pipe */

774

process *new_process = malloc(sizeof(process));

775

if (new_process == NULL){

776

perror("malloc");

879

777

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

880

778

if(ret < 0){

881

perror("sigprocmask");

779

perror("sigprocmask");

882

780

}

883

781

exitstatus = EXIT_FAILURE;

884

782

goto fallback;

885

783

}

886

784

887

new_plugin->pid = pid;

888

new_plugin->fd = pipefd[0];

889

785

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

786

.fd = pipefd[0],

787

.next = process_list };

788

// List handling

789

process_list = new_process;

890

790

/* Unblock SIGCHLD so signal handler can be run if this process

891

791

has already completed */

892

792

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

896

796

goto fallback;

897

797

}

898

798

899

FD_SET(new_plugin->fd, &rfds_all);

799

FD_SET(new_process->fd, &rfds_all);

900

800

901

if (maxfd < new_plugin->fd){

902

maxfd = new_plugin->fd;

801

if (maxfd < new_process->fd){

802

maxfd = new_process->fd;

903

803

}

904

804

905

805

}

906

806

807

free_plugin_list(plugin_list);

808

plugin_list = NULL;

809

907

810

closedir(dir);

908

811

dir = NULL;

909

910

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

911

if(p->pid != 0){

912

break;

913

}

914

if(p->next == NULL){

915

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

916

" directory?\n");

917

free_plugin_list();

918

}

812

813

if (process_list == NULL){

814

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

815

" directory?\n");

816

process_list = NULL;

919

817

}

920

921

/* Main loop while running plugins exist */

922

while(plugin_list){

818

while(process_list){

923

819

fd_set rfds = rfds_all;

924

820

int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);

925

821

if (select_ret == -1){

929

825

}

930

826

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

931

827

from one of them */

932

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

828

for(process *proc = process_list; proc ; proc = proc->next){

933

829

/* Is this process completely done? */

934

830

if(proc->eof and proc->completed){

935

831

/* Only accept the plugin output if it exited cleanly */

936

832

if(not WIFEXITED(proc->status)

937

833

or WEXITSTATUS(proc->status) != 0){

938

834

/* Bad exit by plugin */

939

940

835

if(debug){

941

836

if(WIFEXITED(proc->status)){

942

837

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

951

846

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

952

847

}

953

848

}

954

955

849

/* Remove the plugin */

956

850

FD_CLR(proc->fd, &rfds_all);

957

958

851

/* Block signal while modifying process_list */

959

852

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

960

853

if(ret < 0){

962

855

exitstatus = EXIT_FAILURE;

963

856

goto fallback;

964

857

}

965

free_plugin(proc);

858

/* Delete this process entry from the list */

859

if(process_list == proc){

860

/* First one - simple */

861

process_list = proc->next;

862

} else {

863

/* Second one or later */

864

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

865

if(p->next == proc){

866

p->next = proc->next;

867

break;

868

}

869

}

870

}

966

871

/* We are done modifying process list, so unblock signal */

967

872

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

968

873

NULL);

969

874

if(ret < 0){

970

875

perror("sigprocmask");

971

exitstatus = EXIT_FAILURE;

972

goto fallback;

973

}

974

975

if(plugin_list == NULL){

976

break;

977

}

978

continue;

876

}

877

free(proc->buffer);

878

free(proc);

879

/* We deleted this process from the list, so we can't go

880

proc->next. Therefore, start over from the beginning of

881

the process list */

882

break;

979

883

}

980

981

884

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

982

885

983

886

bool bret = print_out_password(proc->buffer,

988

891

}

989

892

goto fallback;

990

893

}

991

992

894

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

993

895

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

994

896

/* This process had nothing to say at this time */

1024

926

1025

927

fallback:

1026

928

1027

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

929

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

1028

930

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

1029

931

occured */

1030

932

bool bret;

1045

947

}

1046

948

1047

949

if(custom_argv != NULL){

1048

for(char **arg = custom_argv+1; *arg != NULL; arg++){

950

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

1049

951

free(*arg);

1050

952

}

1051

953

free(custom_argv);

1052

954

}

955

free_plugin_list(plugin_list);

1053

956

1054

957

if(dir != NULL){

1055

958

closedir(dir);

1056

959

}

1057

960

1058

961

/* Free the process list and kill the processes */

1059

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

1060

if(p->pid != 0){

1061

close(p->fd);

1062

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

1063

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

1064

/* Set-uid proccesses might not get closed */

1065

perror("kill");

1066

}

962

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

963

next = process_list->next;

964

close(process_list->fd);

965

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

966

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

967

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

968

perror("kill");

1067

969

}

970

free(process_list->buffer);

971

free(process_list);

1068

972

}

1069

973

1070

974

/* Wait for any remaining child processes to terminate */

1074

978

if(errno != ECHILD){

1075

979

perror("wait");

1076

980

}

1077

1078

free_plugin_list();

1079

1080

free(plugindir);

1081

free(argfile);

1082

981

1083

982

return exitstatus;

1084

983

}