/mandos/release : revision 237.2.122

30

*/

31

32

/* Needed by GPGME, specifically gpgme_data_seek() */

33

#ifndef _LARGEFILE_SOURCE

33

34

#define _LARGEFILE_SOURCE

35

#endif

36

#ifndef _FILE_OFFSET_BITS

34

37

#define _FILE_OFFSET_BITS 64

38

#endif

35

39

36

40

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

37

41

38

42

#include <stdio.h> /* fprintf(), stderr, fwrite(),

39

stdout, ferror(), sscanf(),

40

remove() */

43

stdout, ferror(), remove() */

41

44

#include <stdint.h> /* uint16_t, uint32_t */

42

45

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

43

46

#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,

44

srand() */

47

srand(), strtof() */

45

48

#include <stdbool.h> /* bool, false, true */

46

49

#include <string.h> /* memset(), strcmp(), strlen(),

47

50

strerror(), asprintf(), strcpy() */

56

59

#include <fcntl.h> /* open() */

57

60

#include <dirent.h> /* opendir(), struct dirent, readdir()

58

61

*/

59

#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */

62

#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,

63

strtoimax() */

60

64

#include <assert.h> /* assert() */

61

65

#include <errno.h> /* perror(), errno */

62

66

#include <time.h> /* nanosleep(), time() */

76

80

argp_parse(), ARGP_KEY_ARG,

77

81

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

78

82

#include <signal.h> /* sigemptyset(), sigaddset(),

79

sigaction(), SIGTERM, sigaction,

80

sig_atomic_t */

83

sigaction(), SIGTERM, sig_atomic_t,

84

raise() */

81

85

82

86

#ifdef __linux__

83

87

#include <sys/klog.h> /* klogctl() */

134

138

} mandos_context;

135

139

136

140

/* global context so signal handler can reach it*/

137

mandos_context mc;

141

mandos_context mc = { .simple_poll = NULL, .server = NULL,

142

.dh_bits = 1024, .priority = "SECURE256"

143

":!CTYPE-X.509:+CTYPE-OPENPGP" };

138

144

139

145

/*

140

146

* Make additional room in "buffer" for at least BUFFER_SIZE more

243

249

return false;

244

250

}

245

251

246

return true;

252

return true;

247

253

}

248

254

249

255

/*

303

309

}

304

310

gpgme_recipient_t recipient;

305

311

recipient = result->recipients;

306

if(recipient){

307

while(recipient != NULL){

308

fprintf(stderr, "Public key algorithm: %s\n",

309

gpgme_pubkey_algo_name(recipient->pubkey_algo));

310

fprintf(stderr, "Key ID: %s\n", recipient->keyid);

311

fprintf(stderr, "Secret key available: %s\n",

312

recipient->status == GPG_ERR_NO_SECKEY

313

? "No" : "Yes");

314

recipient = recipient->next;

315

}

312

while(recipient != NULL){

313

fprintf(stderr, "Public key algorithm: %s\n",

314

gpgme_pubkey_algo_name(recipient->pubkey_algo));

315

fprintf(stderr, "Key ID: %s\n", recipient->keyid);

316

fprintf(stderr, "Secret key available: %s\n",

317

recipient->status == GPG_ERR_NO_SECKEY

318

? "No" : "Yes");

319

recipient = recipient->next;

316

320

}

317

321

}

318

322

}

510

514

static void empty_log(__attribute__((unused)) AvahiLogLevel level,

511

515

__attribute__((unused)) const char *txt){}

512

516

517

sig_atomic_t quit_now = 0;

518

int signal_received = 0;

519

513

520

/* Called when a Mandos server is found */

514

521

static int start_mandos_communication(const char *ip, uint16_t port,

515

522

AvahiIfIndex if_index,

516

523

int af){

517

int ret, tcp_sd;

524

int ret, tcp_sd = -1;

518

525

ssize_t sret;

519

526

union {

520

527

struct sockaddr_in in;

530

537

gnutls_session_t session;

531

538

int pf; /* Protocol family */

532

539

540

if(quit_now){

541

return -1;

542

}

543

533

544

switch(af){

534

545

case AF_INET6:

535

546

pf = PF_INET6;

555

566

tcp_sd = socket(pf, SOCK_STREAM, 0);

556

567

if(tcp_sd < 0){

557

568

perror("socket");

558

return -1;

569

retval = -1;

570

goto mandos_end;

571

}

572

573

if(quit_now){

574

goto mandos_end;

559

575

}

560

576

561

577

memset(&to, 0, sizeof(to));

562

578

if(af == AF_INET6){

563

to.in6.sin6_family = (uint16_t)af;

579

to.in6.sin6_family = (sa_family_t)af;

564

580

ret = inet_pton(af, ip, &to.in6.sin6_addr);

565

581

} else { /* IPv4 */

566

582

to.in.sin_family = (sa_family_t)af;

568

584

}

569

585

if(ret < 0 ){

570

586

perror("inet_pton");

571

return -1;

587

retval = -1;

588

goto mandos_end;

572

589

}

573

590

if(ret == 0){

574

591

fprintf(stderr, "Bad address: %s\n", ip);

575

return -1;

592

retval = -1;

593

goto mandos_end;

576

594

}

577

595

if(af == AF_INET6){

578

596

to.in6.sin6_port = htons(port); /* Spurious warnings from

585

603

if(if_index == AVAHI_IF_UNSPEC){

586

604

fprintf(stderr, "An IPv6 link-local address is incomplete"

587

605

" without a network interface\n");

588

return -1;

606

retval = -1;

607

goto mandos_end;

589

608

}

590

609

/* Set the network interface number as scope */

591

610

to.in6.sin6_scope_id = (uint32_t)if_index;

596

615

-Wunreachable-code */

597

616

}

598

617

618

if(quit_now){

619

goto mandos_end;

620

}

621

599

622

if(debug){

600

623

if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){

601

624

char interface[IF_NAMESIZE];

628

651

}

629

652

}

630

653

654

if(quit_now){

655

goto mandos_end;

656

}

657

631

658

if(af == AF_INET6){

632

659

ret = connect(tcp_sd, &to.in6, sizeof(to));

633

660

} else {

635

662

}

636

663

if(ret < 0){

637

664

perror("connect");

638

return -1;

665

retval = -1;

666

goto mandos_end;

667

}

668

669

if(quit_now){

670

goto mandos_end;

639

671

}

640

672

641

673

const char *out = mandos_protocol_version;

660

692

break;

661

693

}

662

694

}

695

696

if(quit_now){

697

goto mandos_end;

698

}

663

699

}

664

700

665

701

if(debug){

666

702

fprintf(stderr, "Establishing TLS session with %s\n", ip);

667

703

}

668

704

705

if(quit_now){

706

goto mandos_end;

707

}

708

669

709

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

670

710

711

if(quit_now){

712

goto mandos_end;

713

}

714

671

715

do{

672

716

ret = gnutls_handshake(session);

717

if(quit_now){

718

goto mandos_end;

719

}

673

720

} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);

674

721

675

722

if(ret != GNUTLS_E_SUCCESS){

689

736

}

690

737

691

738

while(true){

739

740

if(quit_now){

741

goto mandos_end;

742

}

743

692

744

buffer_capacity = incbuffer(&buffer, buffer_length,

693

745

buffer_capacity);

694

746

if(buffer_capacity == 0){

697

749

goto mandos_end;

698

750

}

699

751

752

if(quit_now){

753

goto mandos_end;

754

}

755

700

756

sret = gnutls_record_recv(session, buffer+buffer_length,

701

757

BUFFER_SIZE);

702

758

if(sret == 0){

710

766

case GNUTLS_E_REHANDSHAKE:

711

767

do{

712

768

ret = gnutls_handshake(session);

769

770

if(quit_now){

771

goto mandos_end;

772

}

713

773

} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);

714

774

if(ret < 0){

715

775

fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");

734

794

fprintf(stderr, "Closing TLS session\n");

735

795

}

736

796

797

if(quit_now){

798

goto mandos_end;

799

}

800

737

801

gnutls_bye(session, GNUTLS_SHUT_RDWR);

738

802

803

if(quit_now){

804

goto mandos_end;

805

}

806

739

807

if(buffer_length > 0){

740

808

decrypted_buffer_size = pgp_packet_decrypt(buffer,

741

809

buffer_length,

743

811

if(decrypted_buffer_size >= 0){

744

812

written = 0;

745

813

while(written < (size_t) decrypted_buffer_size){

814

if(quit_now){

815

goto mandos_end;

816

}

817

746

818

ret = (int)fwrite(decrypted_buffer + written, 1,

747

819

(size_t)decrypted_buffer_size - written,

748

820

stdout);

768

840

769

841

mandos_end:

770

842

free(buffer);

771

ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));

843

if(tcp_sd >= 0){

844

ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));

845

}

772

846

if(ret == -1){

773

847

perror("close");

774

848

}

775

849

gnutls_deinit(session);

850

if(quit_now){

851

retval = -1;

852

}

776

853

return retval;

777

854

}

778

855

795

872

/* Called whenever a service has been resolved successfully or

796

873

timed out */

797

874

875

if(quit_now){

876

return;

877

}

878

798

879

switch(event){

799

880

default:

800

881

case AVAHI_RESOLVER_FAILURE:

837

918

/* Called whenever a new services becomes available on the LAN or

838

919

is removed from the LAN */

839

920

921

if(quit_now){

922

return;

923

}

924

840

925

switch(event){

841

926

default:

842

927

case AVAHI_BROWSER_FAILURE:

852

937

the callback function is called the Avahi server will free the

853

938

resolver for us. */

854

939

855

if(!(avahi_s_service_resolver_new(mc.server, interface,

856

protocol, name, type, domain,

857

AVAHI_PROTO_INET6, 0,

858

resolve_callback, NULL)))

940

if(avahi_s_service_resolver_new(mc.server, interface, protocol,

941

name, type, domain, protocol, 0,

942

resolve_callback, NULL) == NULL)

859

943

fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",

860

944

name, avahi_strerror(avahi_server_errno(mc.server)));

861

945

break;

872

956

}

873

957

}

874

958

875

sig_atomic_t quit_now = 0;

876

877

static void handle_sigterm(__attribute__((unused)) int sig){

959

/* stop main loop after sigterm has been called */

960

static void handle_sigterm(int sig){

878

961

if(quit_now){

879

962

return;

880

963

}

881

964

quit_now = 1;

965

signal_received = sig;

882

966

int old_errno = errno;

883

967

if(mc.simple_poll != NULL){

884

968

avahi_simple_poll_quit(mc.simple_poll);

891

975

int error;

892

976

int ret;

893

977

intmax_t tmpmax;

894

int numchars;

978

char *tmp;

895

979

int exitcode = EXIT_SUCCESS;

896

980

const char *interface = "eth0";

897

981

struct ifreq network;

898

int sd;

982

int sd = -1;

983

bool take_down_interface = false;

899

984

uid_t uid;

900

985

gid_t gid;

901

986

char *connect_to = NULL;

905

990

const char *seckey = PATHDIR "/" SECKEY;

906

991

const char *pubkey = PATHDIR "/" PUBKEY;

907

992

908

/* Initialize Mandos context */

909

mc = (mandos_context){ .simple_poll = NULL, .server = NULL,

910

.dh_bits = 1024, .priority = "SECURE256"

911

":!CTYPE-X.509:+CTYPE-OPENPGP" };

912

993

bool gnutls_initialized = false;

913

994

bool gpgme_initialized = false;

914

double delay = 2.5;

915

995

float delay = 2.5f;

996

916

997

struct sigaction old_sigterm_action;

917

998

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

918

999

972

1053

pubkey = arg;

973

1054

break;

974

1055

case 129: /* --dh-bits */

975

ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);

976

if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax

977

or arg[numchars] != '\0'){

1056

errno = 0;

1057

tmpmax = strtoimax(arg, &tmp, 10);

1058

if(errno != 0 or tmp == arg or *tmp != '\0'

1059

or tmpmax != (typeof(mc.dh_bits))tmpmax){

978

1060

fprintf(stderr, "Bad number of DH bits\n");

979

1061

exit(EXIT_FAILURE);

980

1062

}

984

1066

mc.priority = arg;

985

1067

break;

986

1068

case 131: /* --delay */

987

ret = sscanf(arg, "%lf%n", &delay, &numchars);

988

if(ret < 1 or arg[numchars] != '\0'){

1069

errno = 0;

1070

delay = strtof(arg, &tmp);

1071

if(errno != 0 or tmp == arg or *tmp != '\0'){

989

1072

fprintf(stderr, "Bad delay\n");

990

1073

exit(EXIT_FAILURE);

991

1074

}

1012

1095

}

1013

1096

}

1014

1097

1098

if(not debug){

1099

avahi_set_log_function(empty_log);

1100

}

1101

1102

/* Initialize Avahi early so avahi_simple_poll_quit() can be called

1103

from the signal handler */

1104

/* Initialize the pseudo-RNG for Avahi */

1105

srand((unsigned int) time(NULL));

1106

mc.simple_poll = avahi_simple_poll_new();

1107

if(mc.simple_poll == NULL){

1108

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1109

exitcode = EXIT_FAILURE;

1110

goto end;

1111

}

1112

1113

sigemptyset(&sigterm_action.sa_mask);

1114

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1115

if(ret == -1){

1116

perror("sigaddset");

1117

exitcode = EXIT_FAILURE;

1118

goto end;

1119

}

1120

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1121

if(ret == -1){

1122

perror("sigaddset");

1123

exitcode = EXIT_FAILURE;

1124

goto end;

1125

}

1126

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1127

if(ret == -1){

1128

perror("sigaddset");

1129

exitcode = EXIT_FAILURE;

1130

goto end;

1131

}

1132

/* Need to check if the handler is SIG_IGN before handling:

1133

| [[info:libc:Initial Signal Actions]] |

1134

| [[info:libc:Basic Signal Handling]] |

1135

*/

1136

ret = sigaction(SIGINT, NULL, &old_sigterm_action);

1137

if(ret == -1){

1138

perror("sigaction");

1139

return EXIT_FAILURE;

1140

}

1141

if(old_sigterm_action.sa_handler != SIG_IGN){

1142

ret = sigaction(SIGINT, &sigterm_action, NULL);

1143

if(ret == -1){

1144

perror("sigaction");

1145

exitcode = EXIT_FAILURE;

1146

goto end;

1147

}

1148

}

1149

ret = sigaction(SIGHUP, NULL, &old_sigterm_action);

1150

if(ret == -1){

1151

perror("sigaction");

1152

return EXIT_FAILURE;

1153

}

1154

if(old_sigterm_action.sa_handler != SIG_IGN){

1155

ret = sigaction(SIGHUP, &sigterm_action, NULL);

1156

if(ret == -1){

1157

perror("sigaction");

1158

exitcode = EXIT_FAILURE;

1159

goto end;

1160

}

1161

}

1162

ret = sigaction(SIGTERM, NULL, &old_sigterm_action);

1163

if(ret == -1){

1164

perror("sigaction");

1165

return EXIT_FAILURE;

1166

}

1167

if(old_sigterm_action.sa_handler != SIG_IGN){

1168

ret = sigaction(SIGTERM, &sigterm_action, NULL);

1169

if(ret == -1){

1170

perror("sigaction");

1171

exitcode = EXIT_FAILURE;

1172

goto end;

1173

}

1174

}

1175

1015

1176

/* If the interface is down, bring it up */

1016

1177

if(interface[0] != '\0'){

1178

if_index = (AvahiIfIndex) if_nametoindex(interface);

1179

if(if_index == 0){

1180

fprintf(stderr, "No such interface: \"%s\"\n", interface);

1181

exitcode = EXIT_FAILURE;

1182

goto end;

1183

}

1184

1185

if(quit_now){

1186

goto end;

1187

}

1188

1017

1189

#ifdef __linux__

1018

1190

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1019

1191

messages to mess up the prompt */

1056

1228

}

1057

1229

if((network.ifr_flags & IFF_UP) == 0){

1058

1230

network.ifr_flags |= IFF_UP;

1231

take_down_interface = true;

1059

1232

ret = ioctl(sd, SIOCSIFFLAGS, &network);

1060

1233

if(ret == -1){

1234

take_down_interface = false;

1061

1235

perror("ioctl SIOCSIFFLAGS");

1062

1236

exitcode = EXIT_FAILURE;

1063

1237

#ifdef __linux__

1085

1259

perror("nanosleep");

1086

1260

}

1087

1261

}

1088

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1089

if(ret == -1){

1090

perror("close");

1262

if(not take_down_interface){

1263

/* We won't need the socket anymore */

1264

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1265

if(ret == -1){

1266

perror("close");

1267

}

1091

1268

}

1092

1269

#ifdef __linux__

1093

1270

if(restore_loglevel){

1100

1277

#endif /* __linux__ */

1101

1278

}

1102

1279

1280

if(quit_now){

1281

goto end;

1282

}

1283

1103

1284

uid = getuid();

1104

1285

gid = getgid();

1105

1286

1114

1295

perror("setuid");

1115

1296

}

1116

1297

1298

if(quit_now){

1299

goto end;

1300

}

1301

1117

1302

ret = init_gnutls_global(pubkey, seckey);

1118

1303

if(ret == -1){

1119

1304

fprintf(stderr, "init_gnutls_global failed\n");

1123

1308

gnutls_initialized = true;

1124

1309

}

1125

1310

1311

if(quit_now){

1312

goto end;

1313

}

1314

1315

tempdir_created = true;

1126

1316

if(mkdtemp(tempdir) == NULL){

1317

tempdir_created = false;

1127

1318

perror("mkdtemp");

1128

1319

goto end;

1129

1320

}

1130

tempdir_created = true;

1321

1322

if(quit_now){

1323

goto end;

1324

}

1131

1325

1132

1326

if(not init_gpgme(pubkey, seckey, tempdir)){

1133

1327

fprintf(stderr, "init_gpgme failed\n");

1137

1331

gpgme_initialized = true;

1138

1332

}

1139

1333

1140

if(interface[0] != '\0'){

1141

if_index = (AvahiIfIndex) if_nametoindex(interface);

1142

if(if_index == 0){

1143

fprintf(stderr, "No such interface: \"%s\"\n", interface);

1144

exitcode = EXIT_FAILURE;

1145

goto end;

1146

}

1334

if(quit_now){

1335

goto end;

1147

1336

}

1148

1337

1149

1338

if(connect_to != NULL){

1155

1344

exitcode = EXIT_FAILURE;

1156

1345

goto end;

1157

1346

}

1347

1348

if(quit_now){

1349

goto end;

1350

}

1351

1158

1352

uint16_t port;

1159

ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);

1160

if(ret < 1 or tmpmax != (uint16_t)tmpmax

1161

or address[numchars+1] != '\0'){

1353

errno = 0;

1354

tmpmax = strtoimax(address+1, &tmp, 10);

1355

if(errno != 0 or tmp == address+1 or *tmp != '\0'

1356

or tmpmax != (uint16_t)tmpmax){

1162

1357

fprintf(stderr, "Bad port number\n");

1163

1358

exitcode = EXIT_FAILURE;

1164

1359

goto end;

1165

1360

}

1361

1362

if(quit_now){

1363

goto end;

1364

}

1365

1166

1366

port = (uint16_t)tmpmax;

1167

1367

*address = '\0';

1168

1368

address = connect_to;

1173

1373

} else {

1174

1374

af = AF_INET;

1175

1375

}

1376

1377

if(quit_now){

1378

goto end;

1379

}

1380

1176

1381

ret = start_mandos_communication(address, port, if_index, af);

1177

1382

if(ret < 0){

1178

1383

exitcode = EXIT_FAILURE;

1182

1387

goto end;

1183

1388

}

1184

1389

1185

if(not debug){

1186

avahi_set_log_function(empty_log);

1187

}

1188

1189

/* Initialize the pseudo-RNG for Avahi */

1190

srand((unsigned int) time(NULL));

1191

1192

/* Allocate main Avahi loop object */

1193

mc.simple_poll = avahi_simple_poll_new();

1194

if(mc.simple_poll == NULL){

1195

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1196

exitcode = EXIT_FAILURE;

1390

if(quit_now){

1197

1391

goto end;

1198

1392

}

1199

1393

1223

1417

goto end;

1224

1418

}

1225

1419

1420

if(quit_now){

1421

goto end;

1422

}

1423

1226

1424

/* Create the Avahi service browser */

1227

1425

sb = avahi_s_service_browser_new(mc.server, if_index,

1228

AVAHI_PROTO_INET6, "_mandos._tcp",

1426

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1229

1427

NULL, 0, browse_callback, NULL);

1230

1428

if(sb == NULL){

1231

1429

fprintf(stderr, "Failed to create service browser: %s\n",

1234

1432

goto end;

1235

1433

}

1236

1434

1237

sigemptyset(&sigterm_action.sa_mask);

1238

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1239

if(ret == -1){

1240

perror("sigaddset");

1241

exitcode = EXIT_FAILURE;

1242

goto end;

1243

}

1244

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1245

if(ret == -1){

1246

perror("sigaddset");

1247

exitcode = EXIT_FAILURE;

1248

goto end;

1249

}

1250

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1251

if(ret == -1){

1252

perror("sigaddset");

1253

exitcode = EXIT_FAILURE;

1254

goto end;

1255

}

1256

ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);

1257

if(ret == -1){

1258

perror("sigaction");

1259

exitcode = EXIT_FAILURE;

1260

goto end;

1261

}

1435

if(quit_now){

1436

goto end;

1437

}

1262

1438

1263

1439

/* Run the main loop */

1264

1440

1294

1470

gpgme_release(mc.ctx);

1295

1471

}

1296

1472

1473

/* Take down the network interface */

1474

if(take_down_interface){

1475

ret = ioctl(sd, SIOCGIFFLAGS, &network);

1476

if(ret == -1){

1477

perror("ioctl SIOCGIFFLAGS");

1478

} else if(network.ifr_flags & IFF_UP) {

1479

network.ifr_flags &= ~IFF_UP; /* clear flag */

1480

ret = ioctl(sd, SIOCSIFFLAGS, &network);

1481

if(ret == -1){

1482

perror("ioctl SIOCSIFFLAGS");

1483

}

1484

}

1485

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1486

if(ret == -1){

1487

perror("close");

1488

}

1489

}

1490

1297

1491

/* Removes the temp directory used by GPGME */

1298

1492

if(tempdir_created){

1299

1493

DIR *d;

1338

1532

}

1339

1533

}

1340

1534

1535

if(quit_now){

1536

sigemptyset(&old_sigterm_action.sa_mask);

1537

old_sigterm_action.sa_handler = SIG_DFL;

1538

ret = sigaction(signal_received, &old_sigterm_action, NULL);

1539

if(ret == -1){

1540

perror("sigaction");

1541

}

1542

raise(signal_received);

1543

}

1544

1341

1545

return exitcode;

1342

1546

}