/mandos/release : revision 147

65

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

66

67

#define BUFFER_SIZE 256

68

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

68

69

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

70

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

69

71

70

72

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

71

73

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

72

74

73

struct process;

74

75

typedef struct process{

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*/

76

86

pid_t pid;

77

87

int fd;

78

88

char *buffer;

81

91

bool eof;

82

92

volatile bool completed;

83

93

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

98

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

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){

99

104

if ((p->name == name)

100

105

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

101

106

return p;

113

118

return NULL;

114

119

}

115

120

}

116

121

117

122

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

118

123

.argc = 1,

119

.envc = 0,

120

124

.disabled = false,

121

.next = *plugin_list };

125

.next = plugin_list };

122

126

123

127

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

124

128

if (new_plugin->argv == NULL){

128

132

}

129

133

new_plugin->argv[0] = copy_name;

130

134

new_plugin->argv[1] = NULL;

131

135

132

136

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

133

137

if(new_plugin->environ == NULL){

134

138

free(copy_name);

137

141

return NULL;

138

142

}

139

143

new_plugin->environ[0] = NULL;

144

140

145

/* Append the new plugin to the list */

141

*plugin_list = new_plugin;

146

plugin_list = new_plugin;

142

147

return new_plugin;

143

148

}

144

149

174

179

}

175

180

176

181

/* Add to a plugin's environment */

177

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

182

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

178

183

if(p == NULL){

179

184

return false;

180

185

}

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

}

181

203

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

182

204

}

183

205

184

185

206

/*

186

207

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

187

208

* Descriptor Flags".

198

219

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

199

220

}

200

221

201

process *process_list = NULL;

202

222

203

223

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

204

224

status. */

205

225

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

206

226

while(true){

207

process *proc = process_list;

227

plugin *proc = plugin_list;

208

228

int status;

209

229

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

210

230

if(pid == 0){

232

252

}

233

253

}

234

254

255

/* Prints out a password to stdout */

235

256

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

236

257

ssize_t ret;

237

258

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

247

268

return true;

248

269

}

249

270

250

static void free_plugin_list(plugin *plugin_list){

251

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

252

next = plugin_list->next;

253

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

254

free(*arg);

255

}

256

free(plugin_list->argv);

257

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

258

free(*env);

259

}

260

free(plugin_list->environ);

261

free(plugin_list);

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

}

295

}

296

}

297

298

free(plugin_node);

299

}

300

301

static void free_plugin_list(void){

302

while(plugin_list != NULL){

303

free_plugin(plugin_list);

262

304

}

263

305

}

264

306

265

307

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

266

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

267

const char *argfile = ARGFILE;

308

char *plugindir = NULL;

309

char *argfile = NULL;

268

310

FILE *conffp;

269

311

size_t d_name_len;

270

312

DIR *dir = NULL;

302

344

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

303

345

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

304

346

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

305

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

347

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

306

348

.arg = "VAR=value",

307

349

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

308

350

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

309

351

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

310

352

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

311

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

353

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

312

354

.arg = "PLUGIN:ENV=value",

313

355

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

314

356

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

315

357

.arg = "PLUGIN",

316

358

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

359

{ .name = "enable", .key = 'e',

360

.arg = "PLUGIN",

361

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

317

362

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

318

363

.arg = "DIRECTORY",

319

364

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

320

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

321

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

322

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

323

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

324

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

325

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

326

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

327

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

365

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

366

.arg = "FILE",

367

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

368

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

369

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

370

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

371

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

372

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

373

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

374

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

375

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

328

376

{ .name = NULL }

329

377

};

330

378

331

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

332

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

333

pointer to our plugin list pointer. */

334

plugin **plugins = state->input;

379

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

380

struct argp_state *state) {

335

381

switch (key) {

336

case 'g':

382

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

337

383

if (arg != NULL){

338

384

char *p;

339

385

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

340

386

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

341

387

continue;

342

388

}

343

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

389

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

344

390

perror("add_argument");

345

391

return ARGP_ERR_UNKNOWN;

346

392

}

347

393

}

348

394

}

349

395

break;

350

case 'e':

396

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

351

397

if(arg == NULL){

352

398

break;

353

399

}

356

402

if(envdef == NULL){

357

403

break;

358

404

}

359

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

405

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

360

406

perror("add_environment");

361

407

}

362

408

}

363

409

break;

364

case 'o':

410

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

365

411

if (arg != NULL){

366

412

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

367

413

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

377

423

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

378

424

continue;

379

425

}

380

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

426

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

381

427

perror("add_argument");

382

428

return ARGP_ERR_UNKNOWN;

383

429

}

385

431

}

386

432

}

387

433

break;

388

case 'f':

434

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

389

435

if(arg == NULL){

390

436

break;

391

437

}

399

445

break;

400

446

}

401

447

envdef++;

402

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

448

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

403

449

perror("add_environment");

404

450

}

405

451

}

406

452

break;

407

case 'd':

453

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

408

454

if (arg != NULL){

409

plugin *p = getplugin(arg, plugins);

455

plugin *p = getplugin(arg);

410

456

if(p == NULL){

411

457

return ARGP_ERR_UNKNOWN;

412

458

}

413

459

p->disabled = true;

414

460

}

415

461

break;

416

case 128:

417

plugindir = arg;

418

break;

419

case 129:

462

case 'e': /* --enable */

463

if (arg != NULL){

464

plugin *p = getplugin(arg);

465

if(p == NULL){

466

return ARGP_ERR_UNKNOWN;

467

}

468

p->disabled = false;

469

}

470

break;

471

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

472

plugindir = strdup(arg);

473

if(plugindir == NULL){

474

perror("strdup");

475

}

476

break;

477

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

478

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

479

break;

480

case 130: /* --userid */

420

481

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

421

482

break;

422

case 130:

483

case 131: /* --groupid */

423

484

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

424

485

break;

425

case 131:

486

case 132: /* --debug */

426

487

debug = true;

427

488

break;

428

489

case ARGP_KEY_ARG:

436

497

return 0;

437

498

}

438

499

439

plugin *plugin_list = NULL;

500

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

501

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

502

error_t parse_opt_config_file (int key, char *arg,

503

__attribute__((unused))

504

struct argp_state *state) {

505

switch (key) {

506

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

507

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

508

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

509

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

510

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

511

case 'e': /* --enable */

512

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

513

break;

514

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

515

argfile = strdup(arg);

516

if(argfile == NULL){

517

perror("strdup");

518

}

519

break;

520

case 130: /* --userid */

521

case 131: /* --groupid */

522

case 132: /* --debug */

523

case ARGP_KEY_ARG:

524

case ARGP_KEY_END:

525

break;

526

default:

527

return ARGP_ERR_UNKNOWN;

528

}

529

return 0;

530

}

440

531

441

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

442

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

532

struct argp argp = { .options = options,

533

.parser = parse_opt_config_file,

534

.args_doc = "",

443

535

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

444

536

445

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

537

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

538

config file location, if any. */

539

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

446

540

if (ret == ARGP_ERR_UNKNOWN){

447

541

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

448

542

exitstatus = EXIT_FAILURE;

449

543

goto fallback;

450

544

}

451

452

conffp = fopen(argfile, "r");

545

546

/* Reset to the normal argument parser */

547

argp.parser = parse_opt;

548

549

/* Open the configfile if available */

550

if (argfile == NULL){

551

conffp = fopen(AFILE, "r");

552

} else {

553

conffp = fopen(argfile, "r");

554

}

453

555

if(conffp != NULL){

454

556

char *org_line = NULL;

455

557

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

467

569

}

468

570

custom_argv[0] = argv[0];

469

571

custom_argv[1] = NULL;

470

572

573

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

574

commented text */

471

575

while(true){

472

576

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

473

577

if(sret == -1){

481

585

continue;

482

586

}

483

587

new_arg = strdup(p);

484

588

if(new_arg == NULL){

589

perror("strdup");

590

exitstatus = EXIT_FAILURE;

591

free(org_line);

592

goto fallback;

593

}

594

485

595

custom_argc += 1;

486

596

custom_argv = realloc(custom_argv, sizeof(char *)

487

597

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

496

606

}

497

607

}

498

608

free(org_line);

499

} else{

609

} else {

500

610

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

501

611

not affect opening plugins */

502

612

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

505

615

goto fallback;

506

616

}

507

617

}

508

618

/* If there was any arguments from configuration file,

619

pass them to parser as command arguments */

509

620

if(custom_argv != NULL){

510

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

621

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

622

0, NULL);

511

623

if (ret == ARGP_ERR_UNKNOWN){

512

624

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

513

625

exitstatus = EXIT_FAILURE;

515

627

}

516

628

}

517

629

630

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

631

config file */

632

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

633

if (ret == ARGP_ERR_UNKNOWN){

634

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

635

exitstatus = EXIT_FAILURE;

636

goto fallback;

637

}

638

518

639

if(debug){

519

640

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

520

641

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

529

650

}

530

651

}

531

652

653

/* Strip permissions down to nobody */

532

654

ret = setuid(uid);

533

655

if (ret == -1){

534

656

perror("setuid");

535

}

536

657

}

537

658

setgid(gid);

538

659

if (ret == -1){

539

660

perror("setgid");

540

661

}

541

662

542

dir = opendir(plugindir);

663

if (plugindir == NULL){

664

dir = opendir(PDIR);

665

} else {

666

dir = opendir(plugindir);

667

}

668

543

669

if(dir == NULL){

544

670

perror("Could not open plugin dir");

545

671

exitstatus = EXIT_FAILURE;

561

687

562

688

FD_ZERO(&rfds_all);

563

689

690

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

564

691

while(true){

565

692

dirst = readdir(dir);

566

693

567

// All directory entries have been processed

694

/* All directory entries have been processed */

568

695

if(dirst == NULL){

569

696

if (errno == EBADF){

570

697

perror("readdir");

576

703

577

704

d_name_len = strlen(dirst->d_name);

578

705

579

// Ignore dotfiles, backup files and other junk

706

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

580

707

{

581

708

bool bad_name = false;

582

709

597

724

break;

598

725

}

599

726

}

600

601

727

if(bad_name){

602

728

continue;

603

729

}

604

605

730

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

606

731

size_t suf_len = strlen(*suf);

607

732

if((d_name_len >= suf_len)

634

759

free(filename);

635

760

continue;

636

761

}

637

762

763

/* Ignore non-executable files */

638

764

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

639

765

if(debug){

640

766

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

643

769

free(filename);

644

770

continue;

645

771

}

646

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

772

773

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

647

774

if(p == NULL){

648

775

perror("getplugin");

649

776

free(filename);

659

786

}

660

787

{

661

788

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

662

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

789

plugin *g = getplugin(NULL);

663

790

if(g != NULL){

664

791

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

665

792

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

668

795

}

669

796

/* Add global environment variables */

670

797

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

671

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

798

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

672

799

perror("add_environment");

673

800

}

674

801

}

679

806

process, too. */

680

807

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

681

808

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

682

char *copy = strdup(*e);

683

if(copy == NULL){

684

perror("strdup");

685

continue;

686

}

687

if(not add_environment(p, copy)){

809

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

688

810

perror("add_environment");

689

811

}

690

812

}

697

819

exitstatus = EXIT_FAILURE;

698

820

goto fallback;

699

821

}

822

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

700

823

ret = set_cloexec_flag(pipefd[0]);

701

824

if(ret < 0){

702

825

perror("set_cloexec_flag");

716

839

exitstatus = EXIT_FAILURE;

717

840

goto fallback;

718

841

}

719

// Starting a new process to be watched

842

/* Starting a new process to be watched */

720

843

pid_t pid = fork();

721

844

if(pid == -1){

722

845

perror("fork");

760

883

}

761

884

/* no return */

762

885

}

763

/* parent process */

886

/* Parent process */

887

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

764

888

free(filename);

765

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

766

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

767

if (new_process == NULL){

768

perror("malloc");

889

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

890

if (new_plugin == NULL){

891

perror("getplugin");

769

892

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

770

893

if(ret < 0){

771

perror("sigprocmask");

894

perror("sigprocmask");

772

895

}

773

896

exitstatus = EXIT_FAILURE;

774

897

goto fallback;

775

898

}

776

899

777

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

778

.fd = pipefd[0],

779

.next = process_list };

780

// List handling

781

process_list = new_process;

900

new_plugin->pid = pid;

901

new_plugin->fd = pipefd[0];

902

782

903

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

783

904

has already completed */

784

905

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

788

909

goto fallback;

789

910

}

790

911

791

FD_SET(new_process->fd, &rfds_all);

912

FD_SET(new_plugin->fd, &rfds_all);

792

913

793

if (maxfd < new_process->fd){

794

maxfd = new_process->fd;

914

if (maxfd < new_plugin->fd){

915

maxfd = new_plugin->fd;

795

916

}

796

917

797

918

}

798

919

799

free_plugin_list(plugin_list);

800

plugin_list = NULL;

801

802

920

closedir(dir);

803

921

dir = NULL;

804

805

if (process_list == NULL){

806

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

807

" directory?\n");

808

process_list = NULL;

922

923

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

924

if(p->pid != 0){

925

break;

926

}

927

if(p->next == NULL){

928

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

929

" directory?\n");

930

free_plugin_list();

931

}

809

932

}

810

while(process_list){

933

934

/* Main loop while running plugins exist */

935

while(plugin_list){

811

936

fd_set rfds = rfds_all;

812

937

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

813

938

if (select_ret == -1){

817

942

}

818

943

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

819

944

from one of them */

820

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

945

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

821

946

/* Is this process completely done? */

822

947

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

823

948

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

824

949

if(not WIFEXITED(proc->status)

825

950

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

826

951

/* Bad exit by plugin */

952

827

953

if(debug){

828

954

if(WIFEXITED(proc->status)){

829

955

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

838

964

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

839

965

}

840

966

}

967

841

968

/* Remove the plugin */

842

969

FD_CLR(proc->fd, &rfds_all);

970

843

971

/* Block signal while modifying process_list */

844

972

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

845

973

if(ret < 0){

847

975

exitstatus = EXIT_FAILURE;

848

976

goto fallback;

849

977

}

850

/* Delete this process entry from the list */

851

if(process_list == proc){

852

/* First one - simple */

853

process_list = proc->next;

854

} else {

855

/* Second one or later */

856

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

857

if(p->next == proc){

858

p->next = proc->next;

859

break;

860

}

861

}

862

}

978

free_plugin(proc);

863

979

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

864

980

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

865

981

NULL);

866

982

if(ret < 0){

867

983

perror("sigprocmask");

868

}

869

free(proc->buffer);

870

free(proc);

871

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

872

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

873

the process list */

874

break;

984

exitstatus = EXIT_FAILURE;

985

goto fallback;

986

}

987

988

if(plugin_list == NULL){

989

break;

990

}

991

continue;

875

992

}

993

876

994

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

877

995

878

996

bool bret = print_out_password(proc->buffer,

883

1001

}

884

1002

goto fallback;

885

1003

}

1004

886

1005

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

887

1006

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

888

1007

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

918

1037

919

1038

fallback:

920

1039

921

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

1040

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

922

1041

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

923

1042

occured */

924

1043

bool bret;

944

1063

}

945

1064

free(custom_argv);

946

1065

}

947

free_plugin_list(plugin_list);

948

1066

949

1067

if(dir != NULL){

950

1068

closedir(dir);

951

1069

}

952

1070

953

1071

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

954

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

955

next = process_list->next;

956

close(process_list->fd);

957

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

958

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

959

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

960

perror("kill");

1072

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

1073

if(p->pid != 0){

1074

close(p->fd);

1075

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

1076

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

1077

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

1078

perror("kill");

1079

}

961

1080

}

962

free(process_list->buffer);

963

free(process_list);

964

1081

}

965

1082

966

1083

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

970

1087

if(errno != ECHILD){

971

1088

perror("wait");

972

1089

}

1090

1091

free_plugin_list();

1092

1093

free(plugindir);

1094

free(argfile);

973

1095

974

1096

return exitstatus;

975

1097

}