/mandos/trunk : revision 604

9

* "browse_callback", and parts of "main".

10

*

11

* Everything else is

12

13

12

13

14

*

15

* This program is free software: you can redistribute it and/or

16

* modify it under the terms of the GNU General Public License as

32

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

33

#ifndef _LARGEFILE_SOURCE

34

#define _LARGEFILE_SOURCE

35

#endif /* not _LARGEFILE_SOURCE */

35

#endif

36

#ifndef _FILE_OFFSET_BITS

37

#define _FILE_OFFSET_BITS 64

38

#endif /* not _FILE_OFFSET_BITS */

38

#endif

39

40

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

41

42

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

43

stdout, ferror() */

43

stdout, ferror(), remove() */

44

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

45

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

46

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

55

opendir(), DIR */

56

#include <sys/stat.h> /* open(), S_ISREG */

57

#include <sys/socket.h> /* socket(), struct sockaddr_in6,

58

inet_pton(), connect(),

59

getnameinfo() */

60

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

58

inet_pton(), connect() */

59

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

61

60

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

62

61

*/

63

62

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

73

72

*/

74

73

#include <unistd.h> /* close(), SEEK_SET, off_t, write(),

75

74

getuid(), getgid(), seteuid(),

76

setgid(), pause(), _exit(),

77

unlinkat() */

78

#include <arpa/inet.h> /* inet_pton(), htons() */

75

setgid(), pause(), _exit() */

76

#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */

79

77

#include <iso646.h> /* not, or, and */

80

78

#include <argp.h> /* struct argp_option, error_t, struct

81

79

argp_state, struct argp,

93

91

argz_delete(), argz_append(),

94

92

argz_stringify(), argz_add(),

95

93

argz_count() */

96

#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,

97

EAI_SYSTEM, gai_strerror() */

98

94

99

95

#ifdef __linux__

100

96

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

142

138

static const char sys_class_net[] = "/sys/class/net";

143

139

char *connect_to = NULL;

144

140

const char *hookdir = HOOKDIR;

145

int hookdir_fd = -1;

146

141

uid_t uid = 65534;

147

142

gid_t gid = 65534;

148

143

185

180

perror(print_text);

186

181

}

187

182

188

__attribute__((format (gnu_printf, 2, 3), nonnull))

183

__attribute__((format (gnu_printf, 2, 3)))

189

184

int fprintf_plus(FILE *stream, const char *format, ...){

190

185

va_list ap;

191

186

va_start (ap, format);

192

187

193

188

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",

194

189

program_invocation_short_name));

195

return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));

190

return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));

196

191

}

197

192

198

193

/*

200

195

* bytes. "buffer_capacity" is how much is currently allocated,

201

196

* "buffer_length" is how much is already used.

202

197

*/

203

__attribute__((nonnull, warn_unused_result))

204

198

size_t incbuffer(char **buffer, size_t buffer_length,

205

199

size_t buffer_capacity){

206

200

if(buffer_length + BUFFER_SIZE > buffer_capacity){

207

char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);

208

if(new_buf == NULL){

209

int old_errno = errno;

210

free(*buffer);

211

errno = old_errno;

212

*buffer = NULL;

201

*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);

202

if(buffer == NULL){

213

203

return 0;

214

204

}

215

*buffer = new_buf;

216

205

buffer_capacity += BUFFER_SIZE;

217

206

}

218

207

return buffer_capacity;

219

208

}

220

209

221

210

/* Add server to set of servers to retry periodically */

222

__attribute__((nonnull, warn_unused_result))

223

211

bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,

224

212

int af, server **current_server){

225

213

int ret;

234

222

.af = af };

235

223

if(new_server->ip == NULL){

236

224

perror_plus("strdup");

237

free(new_server);

238

return false;

239

}

240

ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));

241

if(ret == -1){

242

perror_plus("clock_gettime");

243

free(new_server->ip);

244

free(new_server);

245

225

return false;

246

226

}

247

227

/* Special case of first server */

249

229

new_server->next = new_server;

250

230

new_server->prev = new_server;

251

231

*current_server = new_server;

232

/* Place the new server last in the list */

252

233

} else {

253

/* Place the new server last in the list */

254

234

new_server->next = *current_server;

255

235

new_server->prev = (*current_server)->prev;

256

236

new_server->prev->next = new_server;

257

237

(*current_server)->prev = new_server;

258

238

}

239

ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);

240

if(ret == -1){

241

perror_plus("clock_gettime");

242

return false;

243

}

259

244

return true;

260

245

}

261

246

262

247

/*

263

248

* Initialize GPGME.

264

249

*/

265

__attribute__((nonnull, warn_unused_result))

266

static bool init_gpgme(const char * const seckey,

267

const char * const pubkey,

268

const char * const tempdir,

269

mandos_context *mc){

250

static bool init_gpgme(const char *seckey, const char *pubkey,

251

const char *tempdir, mandos_context *mc){

270

252

gpgme_error_t rc;

271

253

gpgme_engine_info_t engine_info;

272

254

273

255

/*

274

256

* Helper function to insert pub and seckey to the engine keyring.

275

257

*/

276

bool import_key(const char * const filename){

258

bool import_key(const char *filename){

277

259

int ret;

278

260

int fd;

279

261

gpgme_data_t pgp_data;

360

342

* Decrypt OpenPGP data.

361

343

* Returns -1 on error

362

344

*/

363

__attribute__((nonnull, warn_unused_result))

364

345

static ssize_t pgp_packet_decrypt(const char *cryptotext,

365

346

size_t crypto_size,

366

347

char **plaintext,

486

467

return plaintext_length;

487

468

}

488

469

489

__attribute__((warn_unused_result))

490

static const char *safer_gnutls_strerror(int value){

470

static const char * safer_gnutls_strerror(int value){

491

471

const char *ret = gnutls_strerror(value);

492

472

if(ret == NULL)

493

473

ret = "(unknown)";

495

475

}

496

476

497

477

/* GnuTLS log function callback */

498

__attribute__((nonnull))

499

478

static void debuggnutls(__attribute__((unused)) int level,

500

479

const char* string){

501

480

fprintf_plus(stderr, "GnuTLS: %s", string);

502

481

}

503

482

504

__attribute__((nonnull, warn_unused_result))

505

483

static int init_gnutls_global(const char *pubkeyfilename,

506

484

const char *seckeyfilename,

507

485

mandos_context *mc){

581

559

return -1;

582

560

}

583

561

584

__attribute__((nonnull, warn_unused_result))

585

562

static int init_gnutls_session(gnutls_session_t *session,

586

563

mandos_context *mc){

587

564

int ret;

644

621

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

645

622

646

623

/* Called when a Mandos server is found */

647

__attribute__((nonnull, warn_unused_result))

648

624

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

649

625

AvahiIfIndex if_index,

650

626

int af, mandos_context *mc){

651

627

int ret, tcp_sd = -1;

652

628

ssize_t sret;

653

struct sockaddr_storage to;

629

union {

630

struct sockaddr_in in;

631

struct sockaddr_in6 in6;

632

} to;

654

633

char *buffer = NULL;

655

634

char *decrypted_buffer = NULL;

656

635

size_t buffer_length = 0;

680

659

return -1;

681

660

}

682

661

683

/* If the interface is specified and we have a list of interfaces */

684

662

if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){

685

663

/* Check if the interface is one of the interfaces we are using */

686

664

bool match = false;

695

673

}

696

674

}

697

675

if(not match){

698

/* This interface does not match any in the list, so we don't

699

connect to the server */

700

676

if(debug){

701

677

char interface[IF_NAMESIZE];

702

678

if(if_indextoname((unsigned int)if_index, interface) == NULL){

737

713

738

714

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

739

715

if(af == AF_INET6){

740

((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;

741

ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);

716

to.in6.sin6_family = (sa_family_t)af;

717

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

742

718

} else { /* IPv4 */

743

((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;

744

ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);

719

to.in.sin_family = (sa_family_t)af;

720

ret = inet_pton(af, ip, &to.in.sin_addr);

745

721

}

746

722

if(ret < 0 ){

747

723

int e = errno;

756

732

goto mandos_end;

757

733

}

758

734

if(af == AF_INET6){

759

((struct sockaddr_in6 *)&to)->sin6_port = htons(port);

760

if(IN6_IS_ADDR_LINKLOCAL

761

(&((struct sockaddr_in6 *)&to)->sin6_addr)){

735

to.in6.sin6_port = htons(port);

736

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

737

(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and

738

-Wunreachable-code*/

762

739

if(if_index == AVAHI_IF_UNSPEC){

763

740

fprintf_plus(stderr, "An IPv6 link-local address is"

764

741

" incomplete without a network interface\n");

766

743

goto mandos_end;

767

744

}

768

745

/* Set the network interface number as scope */

769

((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;

746

to.in6.sin6_scope_id = (uint32_t)if_index;

770

747

}

771

748

} else {

772

((struct sockaddr_in *)&to)->sin_port = htons(port);

749

to.in.sin_port = htons(port); /* Spurious warnings from

750

-Wconversion and

751

-Wunreachable-code */

773

752

}

774

753

775

754

if(quit_now){

792

771

}

793

772

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

794

773

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

774

const char *pcret;

795

775

if(af == AF_INET6){

796

ret = getnameinfo((struct sockaddr *)&to,

797

sizeof(struct sockaddr_in6),

798

addrstr, sizeof(addrstr), NULL, 0,

799

NI_NUMERICHOST);

776

pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,

777

sizeof(addrstr));

800

778

} else {

801

ret = getnameinfo((struct sockaddr *)&to,

802

sizeof(struct sockaddr_in),

803

addrstr, sizeof(addrstr), NULL, 0,

804

NI_NUMERICHOST);

779

pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,

780

sizeof(addrstr));

805

781

}

806

if(ret == EAI_SYSTEM){

807

perror_plus("getnameinfo");

808

} else if(ret != 0) {

809

fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));

810

} else if(strcmp(addrstr, ip) != 0){

811

fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);

782

if(pcret == NULL){

783

perror_plus("inet_ntop");

784

} else {

785

if(strcmp(addrstr, ip) != 0){

786

fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);

787

}

812

788

}

813

789

}

814

790

818

794

}

819

795

820

796

if(af == AF_INET6){

821

ret = connect(tcp_sd, (struct sockaddr *)&to,

822

sizeof(struct sockaddr_in6));

797

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

823

798

} else {

824

ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */

825

sizeof(struct sockaddr_in));

799

ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */

826

800

}

827

801

if(ret < 0){

828

if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){

802

if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){

829

803

int e = errno;

830

804

perror_plus("connect");

831

805

errno = e;

1046

1020

return retval;

1047

1021

}

1048

1022

1049

__attribute__((nonnull))

1050

1023

static void resolve_callback(AvahiSServiceResolver *r,

1051

1024

AvahiIfIndex interface,

1052

1025

AvahiProtocol proto,

1060

1033

AVAHI_GCC_UNUSED AvahiStringList *txt,

1061

1034

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1062

1035

flags,

1063

void *mc){

1036

void* mc){

1064

1037

if(r == NULL){

1065

1038

return;

1066

1039

}

1119

1092

const char *domain,

1120

1093

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1121

1094

flags,

1122

void *mc){

1095

void* mc){

1123

1096

if(b == NULL){

1124

1097

return;

1125

1098

}

1185

1158

errno = old_errno;

1186

1159

}

1187

1160

1188

__attribute__((nonnull, warn_unused_result))

1189

1161

bool get_flags(const char *ifname, struct ifreq *ifr){

1190

1162

int ret;

1191

1163

error_t ret_errno;

1210

1182

return true;

1211

1183

}

1212

1184

1213

__attribute__((nonnull, warn_unused_result))

1214

1185

bool good_flags(const char *ifname, const struct ifreq *ifr){

1215

1186

1216

1187

/* Reject the loopback device */

1258

1229

* corresponds to an acceptable network device.

1259

1230

* (This function is passed to scandir(3) as a filter function.)

1260

1231

*/

1261

__attribute__((nonnull, warn_unused_result))

1262

1232

int good_interface(const struct dirent *if_entry){

1263

1233

if(if_entry->d_name[0] == '.'){

1264

1234

return 0;

1282

1252

/*

1283

1253

* This function determines if a network interface is up.

1284

1254

*/

1285

__attribute__((nonnull, warn_unused_result))

1286

1255

bool interface_is_up(const char *interface){

1287

1256

struct ifreq ifr;

1288

1257

if(not get_flags(interface, &ifr)){

1299

1268

/*

1300

1269

* This function determines if a network interface is running

1301

1270

*/

1302

__attribute__((nonnull, warn_unused_result))

1303

1271

bool interface_is_running(const char *interface){

1304

1272

struct ifreq ifr;

1305

1273

if(not get_flags(interface, &ifr)){

1313

1281

return (bool)(ifr.ifr_flags & IFF_RUNNING);

1314

1282

}

1315

1283

1316

__attribute__((nonnull, pure, warn_unused_result))

1317

1284

int notdotentries(const struct dirent *direntry){

1318

1285

/* Skip "." and ".." */

1319

1286

if(direntry->d_name[0] == '.'

1326

1293

}

1327

1294

1328

1295

/* Is this directory entry a runnable program? */

1329

__attribute__((nonnull, warn_unused_result))

1330

1296

int runnable_hook(const struct dirent *direntry){

1331

1297

int ret;

1332

1298

size_t sret;

1340

1306

sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

1341

1307

"abcdefghijklmnopqrstuvwxyz"

1342

1308

"0123456789"

1343

"_.-");

1309

"_-");

1344

1310

if((direntry->d_name)[sret] != '\0'){

1345

1311

/* Contains non-allowed characters */

1346

1312

if(debug){

1350

1316

return 0;

1351

1317

}

1352

1318

1353

ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);

1319

char *fullname = NULL;

1320

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1321

if(ret < 0){

1322

perror_plus("asprintf");

1323

return 0;

1324

}

1325

1326

ret = stat(fullname, &st);

1354

1327

if(ret == -1){

1355

1328

if(debug){

1356

1329

perror_plus("Could not stat hook");

1380

1353

return 1;

1381

1354

}

1382

1355

1383

__attribute__((nonnull, warn_unused_result))

1384

1356

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1385

1357

mandos_context *mc){

1386

1358

int ret;

1390

1362

1391

1363

while(true){

1392

1364

if(mc->current_server == NULL){

1393

if(debug){

1365

if (debug){

1394

1366

fprintf_plus(stderr, "Wait until first server is found."

1395

1367

" No timeout!\n");

1396

1368

}

1397

1369

ret = avahi_simple_poll_iterate(s, -1);

1398

1370

} else {

1399

if(debug){

1371

if (debug){

1400

1372

fprintf_plus(stderr, "Check current_server if we should run"

1401

1373

" it, or wait\n");

1402

1374

}

1419

1391

- ((intmax_t)waited_time.tv_sec * 1000))

1420

1392

- ((intmax_t)waited_time.tv_nsec / 1000000));

1421

1393

1422

if(debug){

1394

if (debug){

1423

1395

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",

1424

1396

block_time);

1425

1397

}

1447

1419

ret = avahi_simple_poll_iterate(s, (int)block_time);

1448

1420

}

1449

1421

if(ret != 0){

1450

if(ret > 0 or errno != EINTR){

1422

if (ret > 0 or errno != EINTR){

1451

1423

return (ret != 1) ? ret : 0;

1452

1424

}

1453

1425

}

1455

1427

}

1456

1428

1457

1429

/* Set effective uid to 0, return errno */

1458

__attribute__((warn_unused_result))

1459

1430

error_t raise_privileges(void){

1460

1431

error_t old_errno = errno;

1461

1432

error_t ret_errno = 0;

1462

1433

if(seteuid(0) == -1){

1463

1434

ret_errno = errno;

1435

perror_plus("seteuid");

1464

1436

}

1465

1437

errno = old_errno;

1466

1438

return ret_errno;

1467

1439

}

1468

1440

1469

1441

/* Set effective and real user ID to 0. Return errno. */

1470

__attribute__((warn_unused_result))

1471

1442

error_t raise_privileges_permanently(void){

1472

1443

error_t old_errno = errno;

1473

1444

error_t ret_errno = raise_privileges();

1477

1448

}

1478

1449

if(setuid(0) == -1){

1479

1450

ret_errno = errno;

1451

perror_plus("seteuid");

1480

1452

}

1481

1453

errno = old_errno;

1482

1454

return ret_errno;

1483

1455

}

1484

1456

1485

1457

/* Set effective user ID to unprivileged saved user ID */

1486

__attribute__((warn_unused_result))

1487

1458

error_t lower_privileges(void){

1488

1459

error_t old_errno = errno;

1489

1460

error_t ret_errno = 0;

1490

1461

if(seteuid(uid) == -1){

1491

1462

ret_errno = errno;

1463

perror_plus("seteuid");

1492

1464

}

1493

1465

errno = old_errno;

1494

1466

return ret_errno;

1495

1467

}

1496

1468

1497

1469

/* Lower privileges permanently */

1498

__attribute__((warn_unused_result))

1499

1470

error_t lower_privileges_permanently(void){

1500

1471

error_t old_errno = errno;

1501

1472

error_t ret_errno = 0;

1502

1473

if(setuid(uid) == -1){

1503

1474

ret_errno = errno;

1475

perror_plus("setuid");

1504

1476

}

1505

1477

errno = old_errno;

1506

1478

return ret_errno;

1507

1479

}

1508

1480

1509

__attribute__((nonnull))

1510

void run_network_hooks(const char *mode, const char *interface,

1481

bool run_network_hooks(const char *mode, const char *interface,

1511

1482

const float delay){

1512

struct dirent **direntries = NULL;

1513

if(hookdir_fd == -1){

1514

hookdir_fd = open(hookdir, O_RDONLY);

1515

if(hookdir_fd == -1){

1516

if(errno == ENOENT){

1517

if(debug){

1518

fprintf_plus(stderr, "Network hook directory \"%s\" not"

1519

" found\n", hookdir);

1520

}

1521

} else {

1522

perror_plus("open");

1523

}

1524

return;

1525

}

1526

}

1527

#ifdef __GLIBC__

1528

#if __GLIBC_PREREQ(2, 15)

1529

int numhooks = scandirat(hookdir_fd, ".", &direntries,

1530

runnable_hook, alphasort);

1531

#else /* not __GLIBC_PREREQ(2, 15) */

1532

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1533

alphasort);

1534

#endif /* not __GLIBC_PREREQ(2, 15) */

1535

#else /* not __GLIBC__ */

1536

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1537

alphasort);

1538

#endif /* not __GLIBC__ */

1483

struct dirent **direntries;

1484

struct dirent *direntry;

1485

int ret;

1486

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1487

alphasort);

1539

1488

if(numhooks == -1){

1540

perror_plus("scandir");

1541

return;

1542

}

1543

struct dirent *direntry;

1544

int ret;

1545

int devnull = open("/dev/null", O_RDONLY);

1546

for(int i = 0; i < numhooks; i++){

1547

direntry = direntries[i];

1548

if(debug){

1549

fprintf_plus(stderr, "Running network hook \"%s\"\n",

1550

direntry->d_name);

1489

if(errno == ENOENT){

1490

if(debug){

1491

fprintf_plus(stderr, "Network hook directory \"%s\" not"

1492

" found\n", hookdir);

1493

}

1494

} else {

1495

perror_plus("scandir");

1551

1496

}

1552

pid_t hook_pid = fork();

1553

if(hook_pid == 0){

1554

/* Child */

1555

/* Raise privileges */

1556

errno = raise_privileges_permanently();

1557

if(errno != 0){

1558

perror_plus("Failed to raise privileges");

1559

_exit(EX_NOPERM);

1560

}

1561

/* Set group */

1562

errno = 0;

1563

ret = setgid(0);

1564

if(ret == -1){

1565

perror_plus("setgid");

1566

_exit(EX_NOPERM);

1567

}

1568

/* Reset supplementary groups */

1569

errno = 0;

1570

ret = setgroups(0, NULL);

1571

if(ret == -1){

1572

perror_plus("setgroups");

1573

_exit(EX_NOPERM);

1574

}

1575

ret = dup2(devnull, STDIN_FILENO);

1576

if(ret == -1){

1577

perror_plus("dup2(devnull, STDIN_FILENO)");

1578

_exit(EX_OSERR);

1579

}

1580

ret = close(devnull);

1581

if(ret == -1){

1582

perror_plus("close");

1583

_exit(EX_OSERR);

1584

}

1585

ret = dup2(STDERR_FILENO, STDOUT_FILENO);

1586

if(ret == -1){

1587

perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");

1588

_exit(EX_OSERR);

1589

}

1590

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1591

if(ret == -1){

1592

perror_plus("setenv");

1593

_exit(EX_OSERR);

1594

}

1595

ret = setenv("DEVICE", interface, 1);

1596

if(ret == -1){

1597

perror_plus("setenv");

1598

_exit(EX_OSERR);

1599

}

1600

ret = setenv("VERBOSITY", debug ? "1" : "0", 1);

1601

if(ret == -1){

1602

perror_plus("setenv");

1603

_exit(EX_OSERR);

1604

}

1605

ret = setenv("MODE", mode, 1);

1606

if(ret == -1){

1607

perror_plus("setenv");

1608

_exit(EX_OSERR);

1609

}

1610

char *delaystring;

1611

ret = asprintf(&delaystring, "%f", (double)delay);

1612

if(ret == -1){

1497

} else {

1498

int devnull = open("/dev/null", O_RDONLY);

1499

for(int i = 0; i < numhooks; i++){

1500

direntry = direntries[i];

1501

char *fullname = NULL;

1502

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1503

if(ret < 0){

1613

1504

perror_plus("asprintf");

1614

_exit(EX_OSERR);

1615

}

1616

ret = setenv("DELAY", delaystring, 1);

1617

if(ret == -1){

1505

continue;

1506

}

1507

if(debug){

1508

fprintf_plus(stderr, "Running network hook \"%s\"\n",

1509

direntry->d_name);

1510

}

1511

pid_t hook_pid = fork();

1512

if(hook_pid == 0){

1513

/* Child */

1514

/* Raise privileges */

1515

raise_privileges_permanently();

1516

/* Set group */

1517

errno = 0;

1518

ret = setgid(0);

1519

if(ret == -1){

1520

perror_plus("setgid");

1521

}

1522

/* Reset supplementary groups */

1523

errno = 0;

1524

ret = setgroups(0, NULL);

1525

if(ret == -1){

1526

perror_plus("setgroups");

1527

}

1528

dup2(devnull, STDIN_FILENO);

1529

close(devnull);

1530

dup2(STDERR_FILENO, STDOUT_FILENO);

1531

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1532

if(ret == -1){

1533

perror_plus("setenv");

1534

_exit(EX_OSERR);

1535

}

1536

ret = setenv("DEVICE", interface, 1);

1537

if(ret == -1){

1538

perror_plus("setenv");

1539

_exit(EX_OSERR);

1540

}

1541

ret = setenv("VERBOSITY", debug ? "1" : "0", 1);

1542

if(ret == -1){

1543

perror_plus("setenv");

1544

_exit(EX_OSERR);

1545

}

1546

ret = setenv("MODE", mode, 1);

1547

if(ret == -1){

1548

perror_plus("setenv");

1549

_exit(EX_OSERR);

1550

}

1551

char *delaystring;

1552

ret = asprintf(&delaystring, "%f", delay);

1553

if(ret == -1){

1554

perror_plus("asprintf");

1555

_exit(EX_OSERR);

1556

}

1557

ret = setenv("DELAY", delaystring, 1);

1558

if(ret == -1){

1559

free(delaystring);

1560

perror_plus("setenv");

1561

_exit(EX_OSERR);

1562

}

1618

1563

free(delaystring);

1619

perror_plus("setenv");

1620

_exit(EX_OSERR);

1621

}

1622

free(delaystring);

1623

if(connect_to != NULL){

1624

ret = setenv("CONNECT", connect_to, 1);

1625

if(ret == -1){

1626

perror_plus("setenv");

1627

_exit(EX_OSERR);

1628

}

1629

}

1630

int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);

1631

if(hook_fd == -1){

1632

perror_plus("openat");

1633

_exit(EXIT_FAILURE);

1634

}

1635

if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){

1636

perror_plus("close");

1637

_exit(EXIT_FAILURE);

1638

}

1639

if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },

1640

environ) == -1){

1641

perror_plus("fexecve");

1642

_exit(EXIT_FAILURE);

1643

}

1644

} else {

1645

int status;

1646

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1647

perror_plus("waitpid");

1648

continue;

1649

}

1650

if(WIFEXITED(status)){

1651

if(WEXITSTATUS(status) != 0){

1652

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1653

" with status %d\n", direntry->d_name,

1654

WEXITSTATUS(status));

1655

continue;

1656

}

1657

} else if(WIFSIGNALED(status)){

1658

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1659

" signal %d\n", direntry->d_name,

1660

WTERMSIG(status));

1661

continue;

1564

if(connect_to != NULL){

1565

ret = setenv("CONNECT", connect_to, 1);

1566

if(ret == -1){

1567

perror_plus("setenv");

1568

_exit(EX_OSERR);

1569

}

1570

}

1571

if(execl(fullname, direntry->d_name, mode, NULL) == -1){

1572

perror_plus("execl");

1573

_exit(EXIT_FAILURE);

1574

}

1662

1575

} else {

1663

fprintf_plus(stderr, "Warning: network hook \"%s\""

1664

" crashed\n", direntry->d_name);

1665

continue;

1666

}

1667

}

1668

if(debug){

1669

fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",

1670

direntry->d_name);

1671

}

1672

}

1673

free(direntries);

1674

if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){

1675

perror_plus("close");

1676

} else {

1677

hookdir_fd = -1;

1678

}

1679

close(devnull);

1576

int status;

1577

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1578

perror_plus("waitpid");

1579

free(fullname);

1580

continue;

1581

}

1582

if(WIFEXITED(status)){

1583

if(WEXITSTATUS(status) != 0){

1584

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1585

" with status %d\n", direntry->d_name,

1586

WEXITSTATUS(status));

1587

free(fullname);

1588

continue;

1589

}

1590

} else if(WIFSIGNALED(status)){

1591

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1592

" signal %d\n", direntry->d_name,

1593

WTERMSIG(status));

1594

free(fullname);

1595

continue;

1596

} else {

1597

fprintf_plus(stderr, "Warning: network hook \"%s\""

1598

" crashed\n", direntry->d_name);

1599

free(fullname);

1600

continue;

1601

}

1602

}

1603

free(fullname);

1604

if(debug){

1605

fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",

1606

direntry->d_name);

1607

}

1608

}

1609

close(devnull);

1610

}

1611

return true;

1680

1612

}

1681

1613

1682

__attribute__((nonnull, warn_unused_result))

1683

1614

error_t bring_up_interface(const char *const interface,

1684

1615

const float delay){

1616

int sd = -1;

1685

1617

error_t old_errno = errno;

1686

int ret;

1618

error_t ret_errno = 0;

1619

int ret, ret_setflags;

1687

1620

struct ifreq network;

1688

1621

unsigned int if_index = if_nametoindex(interface);

1689

1622

if(if_index == 0){

1698

1631

}

1699

1632

1700

1633

if(not interface_is_up(interface)){

1701

error_t ret_errno = 0, ioctl_errno = 0;

1702

if(not get_flags(interface, &network)){

1634

if(not get_flags(interface, &network) and debug){

1703

1635

ret_errno = errno;

1704

1636

fprintf_plus(stderr, "Failed to get flags for interface "

1705

1637

"\"%s\"\n", interface);

1706

errno = old_errno;

1707

1638

return ret_errno;

1708

1639

}

1709

network.ifr_flags |= IFF_UP; /* set flag */

1640

network.ifr_flags |= IFF_UP;

1710

1641

1711

int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1712

if(sd == -1){

1642

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1643

if(sd < 0){

1713

1644

ret_errno = errno;

1714

1645

perror_plus("socket");

1715

1646

errno = old_errno;

1716

1647

return ret_errno;

1717

1648

}

1718

1649

1719

1650

if(quit_now){

1720

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

1721

if(ret == -1){

1722

perror_plus("close");

1723

}

1651

close(sd);

1724

1652

errno = old_errno;

1725

1653

return EINTR;

1726

1654

}

1730

1658

interface);

1731

1659

}

1732

1660

1733

/* Raise privileges */

1734

ret_errno = raise_privileges();

1735

if(ret_errno != 0){

1736

errno = ret_errno;

1737

perror_plus("Failed to raise privileges");

1738

}

1661

/* Raise priviliges */

1662

raise_privileges();

1739

1663

1740

1664

#ifdef __linux__

1741

int ret_linux;

1742

bool restore_loglevel = false;

1743

if(ret_errno == 0){

1744

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1745

messages about the network interface to mess up the prompt */

1746

ret_linux = klogctl(8, NULL, 5);

1747

if(ret_linux == -1){

1748

perror_plus("klogctl");

1749

} else {

1750

restore_loglevel = true;

1751

}

1665

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1666

messages about the network interface to mess up the prompt */

1667

int ret_linux = klogctl(8, NULL, 5);

1668

bool restore_loglevel = true;

1669

if(ret_linux == -1){

1670

restore_loglevel = false;

1671

perror_plus("klogctl");

1752

1672

}

1753

1673

#endif /* __linux__ */

1754

int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);

1755

ioctl_errno = errno;

1674

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

1675

ret_errno = errno;

1756

1676

#ifdef __linux__

1757

1677

if(restore_loglevel){

1758

1678

ret_linux = klogctl(7, NULL, 0);

1762

1682

}

1763

1683

#endif /* __linux__ */

1764

1684

1765

/* If raise_privileges() succeeded above */

1766

if(ret_errno == 0){

1767

/* Lower privileges */

1768

ret_errno = lower_privileges();

1769

if(ret_errno != 0){

1770

errno = ret_errno;

1771

perror_plus("Failed to lower privileges");

1772

}

1773

}

1685

/* Lower privileges */

1686

lower_privileges();

1774

1687

1775

1688

/* Close the socket */

1776

1689

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

1779

1692

}

1780

1693

1781

1694

if(ret_setflags == -1){

1782

errno = ioctl_errno;

1695

errno = ret_errno;

1783

1696

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1784

1697

errno = old_errno;

1785

return ioctl_errno;

1698

return ret_errno;

1786

1699

}

1787

1700

} else if(debug){

1788

1701

fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",

1806

1719

return 0;

1807

1720

}

1808

1721

1809

__attribute__((nonnull, warn_unused_result))

1810

1722

error_t take_down_interface(const char *const interface){

1723

int sd = -1;

1811

1724

error_t old_errno = errno;

1725

error_t ret_errno = 0;

1726

int ret, ret_setflags;

1812

1727

struct ifreq network;

1813

1728

unsigned int if_index = if_nametoindex(interface);

1814

1729

if(if_index == 0){

1817

1732

return ENXIO;

1818

1733

}

1819

1734

if(interface_is_up(interface)){

1820

error_t ret_errno = 0, ioctl_errno = 0;

1821

1735

if(not get_flags(interface, &network) and debug){

1822

1736

ret_errno = errno;

1823

1737

fprintf_plus(stderr, "Failed to get flags for interface "

1824

1738

"\"%s\"\n", interface);

1825

errno = old_errno;

1826

1739

return ret_errno;

1827

1740

}

1828

1741

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

1829

1742

1830

int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1831

if(sd == -1){

1743

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1744

if(sd < 0){

1832

1745

ret_errno = errno;

1833

1746

perror_plus("socket");

1834

1747

errno = old_errno;

1840

1753

interface);

1841

1754

}

1842

1755

1843

/* Raise privileges */

1844

ret_errno = raise_privileges();

1845

if(ret_errno != 0){

1846

errno = ret_errno;

1847

perror_plus("Failed to raise privileges");

1848

}

1849

1850

int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);

1851

ioctl_errno = errno;

1852

1853

/* If raise_privileges() succeeded above */

1854

if(ret_errno == 0){

1855

/* Lower privileges */

1856

ret_errno = lower_privileges();

1857

if(ret_errno != 0){

1858

errno = ret_errno;

1859

perror_plus("Failed to lower privileges");

1860

}

1861

}

1756

/* Raise priviliges */

1757

raise_privileges();

1758

1759

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

1760

ret_errno = errno;

1761

1762

/* Lower privileges */

1763

lower_privileges();

1862

1764

1863

1765

/* Close the socket */

1864

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

1766

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

1865

1767

if(ret == -1){

1866

1768

perror_plus("close");

1867

1769

}

1868

1770

1869

1771

if(ret_setflags == -1){

1870

errno = ioctl_errno;

1772

errno = ret_errno;

1871

1773

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1872

1774

errno = old_errno;

1873

return ioctl_errno;

1775

return ret_errno;

1874

1776

}

1875

1777

} else if(debug){

1876

1778

fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",

1884

1786

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

1885

1787

mandos_context mc = { .server = NULL, .dh_bits = 1024,

1886

1788

.priority = "SECURE256:!CTYPE-X.509:"

1887

"+CTYPE-OPENPGP", .current_server = NULL,

1789

"+CTYPE-OPENPGP", .current_server = NULL,

1888

1790

.interfaces = NULL, .interfaces_size = 0 };

1889

1791

AvahiSServiceBrowser *sb = NULL;

1890

1792

error_t ret_errno;

1894

1796

int exitcode = EXIT_SUCCESS;

1895

1797

char *interfaces_to_take_down = NULL;

1896

1798

size_t interfaces_to_take_down_size = 0;

1897

char run_tempdir[] = "/run/tmp/mandosXXXXXX";

1898

char old_tempdir[] = "/tmp/mandosXXXXXX";

1899

char *tempdir = NULL;

1799

char tempdir[] = "/tmp/mandosXXXXXX";

1800

bool tempdir_created = false;

1900

1801

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1901

1802

const char *seckey = PATHDIR "/" SECKEY;

1902

1803

const char *pubkey = PATHDIR "/" PUBKEY;

1903

1804

char *interfaces_hooks = NULL;

1805

size_t interfaces_hooks_size = 0;

1904

1806

1905

1807

bool gnutls_initialized = false;

1906

1808

bool gpgme_initialized = false;

2084

1986

/* Work around Debian bug #633582:

2085

1987

<http://bugs.debian.org/633582> */

2086

1988

2087

/* Re-raise privileges */

2088

ret_errno = raise_privileges();

2089

if(ret_errno != 0){

2090

errno = ret_errno;

2091

perror_plus("Failed to raise privileges");

2092

} else {

1989

/* Re-raise priviliges */

1990

if(raise_privileges() == 0){

2093

1991

struct stat st;

2094

1992

2095

1993

if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){

2135

2033

}

2136

2034

2137

2035

/* Lower privileges */

2138

ret_errno = lower_privileges();

2139

if(ret_errno != 0){

2140

errno = ret_errno;

2141

perror_plus("Failed to lower privileges");

2142

}

2036

lower_privileges();

2143

2037

}

2144

2038

}

2145

2039

2169

2063

goto end;

2170

2064

}

2171

2065

memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);

2172

argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');

2173

}

2174

run_network_hooks("start", interfaces_hooks != NULL ?

2175

interfaces_hooks : "", delay);

2066

interfaces_hooks_size = mc.interfaces_size;

2067

argz_stringify(interfaces_hooks, interfaces_hooks_size,

2068

(int)',');

2069

}

2070

if(not run_network_hooks("start", interfaces_hooks != NULL ?

2071

interfaces_hooks : "", delay)){

2072

goto end;

2073

}

2176

2074

}

2177

2075

2178

2076

if(not debug){

2256

2154

2257

2155

/* If no interfaces were specified, make a list */

2258

2156

if(mc.interfaces == NULL){

2259

struct dirent **direntries = NULL;

2157

struct dirent **direntries;

2260

2158

/* Look for any good interfaces */

2261

2159

ret = scandir(sys_class_net, &direntries, good_interface,

2262

2160

alphasort);

2266

2164

ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,

2267

2165

direntries[i]->d_name);

2268

2166

if(ret_errno != 0){

2269

errno = ret_errno;

2270

2167

perror_plus("argz_add");

2271

2168

continue;

2272

2169

}

2277

2174

}

2278

2175

free(direntries);

2279

2176

} else {

2280

if(ret == 0){

2281

free(direntries);

2282

}

2177

free(direntries);

2283

2178

fprintf_plus(stderr, "Could not find a network interface\n");

2284

2179

exitcode = EXIT_FAILURE;

2285

2180

goto end;

2286

2181

}

2287

2182

}

2288

2183

2289

/* Bring up interfaces which are down, and remove any "none"s */

2184

/* Bring up interfaces which are down */

2290

2185

{

2291

2186

char *interface = NULL;

2292

2187

while((interface = argz_next(mc.interfaces, mc.interfaces_size,

2308

2203

break;

2309

2204

}

2310

2205

bool interface_was_up = interface_is_up(interface);

2311

errno = bring_up_interface(interface, delay);

2206

ret = bring_up_interface(interface, delay);

2312

2207

if(not interface_was_up){

2313

if(errno != 0){

2208

if(ret != 0){

2209

errno = ret;

2314

2210

perror_plus("Failed to bring up interface");

2315

2211

} else {

2316

errno = argz_add(&interfaces_to_take_down,

2317

&interfaces_to_take_down_size,

2318

interface);

2319

if(errno != 0){

2320

perror_plus("argz_add");

2321

}

2212

ret_errno = argz_add(&interfaces_to_take_down,

2213

&interfaces_to_take_down_size,

2214

interface);

2322

2215

}

2323

2216

}

2324

2217

}

2353

2246

goto end;

2354

2247

}

2355

2248

2356

/* Try /run/tmp before /tmp */

2357

tempdir = mkdtemp(run_tempdir);

2358

if(tempdir == NULL and errno == ENOENT){

2359

if(debug){

2360

fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",

2361

run_tempdir, old_tempdir);

2362

}

2363

tempdir = mkdtemp(old_tempdir);

2364

}

2365

if(tempdir == NULL){

2249

if(mkdtemp(tempdir) == NULL){

2366

2250

perror_plus("mkdtemp");

2367

2251

goto end;

2368

2252

}

2253

tempdir_created = true;

2369

2254

2370

2255

if(quit_now){

2371

2256

goto end;

2443

2328

fprintf_plus(stderr, "Retrying in %d seconds\n",

2444

2329

(int)retry_interval);

2445

2330

}

2446

sleep((unsigned int)retry_interval);

2331

sleep((int)retry_interval);

2447

2332

}

2448

2333

2449

if(not quit_now){

2334

if (not quit_now){

2450

2335

exitcode = EXIT_SUCCESS;

2451

2336

}

2452

2337

2507

2392

if(debug){

2508

2393

fprintf_plus(stderr, "Starting Avahi loop search\n");

2509

2394

}

2510

2395

2511

2396

ret = avahi_loop_with_timeout(simple_poll,

2512

2397

(int)(retry_interval * 1000), &mc);

2513

2398

if(debug){

2554

2439

}

2555

2440

}

2556

2441

2557

/* Re-raise privileges */

2442

/* Re-raise priviliges */

2558

2443

{

2559

ret_errno = raise_privileges();

2560

if(ret_errno != 0){

2561

errno = ret_errno;

2562

perror_plus("Failed to raise privileges");

2563

} else {

2564

2565

/* Run network hooks */

2566

run_network_hooks("stop", interfaces_hooks != NULL ?

2567

interfaces_hooks : "", delay);

2568

2569

/* Take down the network interfaces which were brought up */

2570

{

2571

char *interface = NULL;

2572

while((interface=argz_next(interfaces_to_take_down,

2573

interfaces_to_take_down_size,

2574

interface))){

2575

ret_errno = take_down_interface(interface);

2576

if(ret_errno != 0){

2577

errno = ret_errno;

2578

perror_plus("Failed to take down interface");

2579

}

2580

}

2581

if(debug and (interfaces_to_take_down == NULL)){

2582

fprintf_plus(stderr, "No interfaces needed to be taken"

2583

" down\n");

2584

}

2585

}

2586

}

2587

2588

ret_errno = lower_privileges_permanently();

2589

if(ret_errno != 0){

2590

errno = ret_errno;

2591

perror_plus("Failed to lower privileges permanently");

2592

}

2444

raise_privileges();

2445

2446

/* Run network hooks */

2447

run_network_hooks("stop", interfaces_hooks != NULL ?

2448

interfaces_hooks : "", delay);

2449

2450

/* Take down the network interfaces which were brought up */

2451

{

2452

char *interface = NULL;

2453

while((interface=argz_next(interfaces_to_take_down,

2454

interfaces_to_take_down_size,

2455

interface))){

2456

ret_errno = take_down_interface(interface);

2457

if(ret_errno != 0){

2458

errno = ret_errno;

2459

perror_plus("Failed to take down interface");

2460

}

2461

}

2462

if(debug and (interfaces_to_take_down == NULL)){

2463

fprintf_plus(stderr, "No interfaces needed to be taken"

2464

" down\n");

2465

}

2466

}

2467

2468

lower_privileges_permanently();

2593

2469

}

2594

2470

2595

2471

free(interfaces_to_take_down);

2596

2472

free(interfaces_hooks);

2597

2473

2598

2474

/* Removes the GPGME temp directory and all files inside */

2599

if(tempdir != NULL){

2475

if(tempdir_created){

2600

2476

struct dirent **direntries = NULL;

2601

int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |

2602

O_NOFOLLOW));

2603

if(tempdir_fd == -1){

2604

perror_plus("open");

2605

} else {

2606

#ifdef __GLIBC__

2607

#if __GLIBC_PREREQ(2, 15)

2608

int numentries = scandirat(tempdir_fd, ".", &direntries,

2609

notdotentries, alphasort);

2610

#else /* not __GLIBC_PREREQ(2, 15) */

2611

int numentries = scandir(tempdir, &direntries, notdotentries,

2612

alphasort);

2613

#endif /* not __GLIBC_PREREQ(2, 15) */

2614

#else /* not __GLIBC__ */

2615

int numentries = scandir(tempdir, &direntries, notdotentries,

2616

alphasort);

2617

#endif /* not __GLIBC__ */

2618

if(numentries >= 0){

2619

for(int i = 0; i < numentries; i++){

2620

ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);

2621

if(ret == -1){

2622

fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"

2623

" \"%s\", 0): %s\n", tempdir,

2624

direntries[i]->d_name, strerror(errno));

2625

}

2626

}

2627

2628

/* need to clean even if 0 because man page doesn't specify */

2629

free(direntries);

2630

if(numentries == -1){

2631

perror_plus("scandir");

2632

}

2633

ret = rmdir(tempdir);

2634

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

2635

perror_plus("rmdir");

2636

}

2477

struct dirent *direntry = NULL;

2478

int numentries = scandir(tempdir, &direntries, notdotentries,

2479

alphasort);

2480

if (numentries > 0){

2481

for(int i = 0; i < numentries; i++){

2482

direntry = direntries[i];

2483

char *fullname = NULL;

2484

ret = asprintf(&fullname, "%s/%s", tempdir,

2485

direntry->d_name);

2486

if(ret < 0){

2487

perror_plus("asprintf");

2488

continue;

2489

}

2490

ret = remove(fullname);

2491

if(ret == -1){

2492

fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,

2493

strerror(errno));

2494

}

2495

free(fullname);

2637

2496

}

2638

TEMP_FAILURE_RETRY(close(tempdir_fd));

2497

}

2498

2499

/* need to clean even if 0 because man page doesn't specify */

2500

free(direntries);

2501

if (numentries == -1){

2502

perror_plus("scandir");

2503

}

2504

ret = rmdir(tempdir);

2505

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

2506

perror_plus("rmdir");

2639

2507

}

2640

2508

}

2641

2509