/mandos/trunk : revision 24.1.149

23

*/

24

25

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

26

asprintf() */

26

asprintf(), O_CLOEXEC */

27

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

28

#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,

29

EXIT_SUCCESS, realloc() */

28

#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,

29

realloc() */

30

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

31

#include <stdio.h> /* perror, fileno(), fprintf(),

32

stderr, STDOUT_FILENO */

33

#include <sys/types.h> /* DIR, opendir(), stat(), struct

33

#include <sys/types.h> /* DIR, fdopendir(), stat(), struct

34

stat, waitpid(), WIFEXITED(),

35

WEXITSTATUS(), wait(), pid_t,

36

uid_t, gid_t, getuid(), getgid(),

42

WCOREDUMP() */

43

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

44

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

45

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

45

#include <dirent.h> /* DIR, struct dirent, fdopendir(),

46

readdir(), closedir(), dirfd() */

47

#include <unistd.h> /* struct stat, stat(), S_ISREG(),

48

fcntl(), setuid(), setgid(),

54

#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,

55

FD_CLOEXEC */

56

#include <string.h> /* strsep, strlen(), asprintf(),

57

strsignal() */

57

strsignal(), strcmp(), strncmp() */

58

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

59

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

60

argp_state, struct argp,

68

*/

69

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

70

#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */

71

#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,

72

EX_CONFIG, EX_UNAVAILABLE, EX_OK */

71

73

72

74

#define BUFFER_SIZE 256

73

75

102

104

/* Gets an existing plugin based on name,

103

105

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

104

106

static plugin *getplugin(char *name){

105

/* Check for exiting plugin with that name */

107

/* Check for existing plugin with that name */

106

108

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

107

109

if((p->name == name)

108

110

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

123

125

copy_name = strdup(name);

124

126

} while(copy_name == NULL and errno == EINTR);

125

127

if(copy_name == NULL){

128

int e = errno;

126

129

free(new_plugin);

130

errno = e;

127

131

return NULL;

128

132

}

129

133

}

137

141

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

138

142

} while(new_plugin->argv == NULL and errno == EINTR);

139

143

if(new_plugin->argv == NULL){

144

int e = errno;

140

145

free(copy_name);

141

146

free(new_plugin);

147

errno = e;

142

148

return NULL;

143

149

}

144

150

new_plugin->argv[0] = copy_name;

148

154

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

149

155

} while(new_plugin->environ == NULL and errno == EINTR);

150

156

if(new_plugin->environ == NULL){

157

int e = errno;

151

158

free(copy_name);

152

159

free(new_plugin->argv);

153

160

free(new_plugin);

161

errno = e;

154

162

return NULL;

155

163

}

156

164

new_plugin->environ[0] = NULL;

230

238

| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |

231

239

*/

232

240

static int set_cloexec_flag(int fd){

233

int ret = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));

241

int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));

234

242

/* If reading the flags failed, return error indication now. */

235

243

if(ret < 0){

236

244

return ret;

237

245

}

238

246

/* Store modified flag word in the descriptor. */

239

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

247

return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,

248

ret | FD_CLOEXEC));

240

249

}

241

250

242

251

349

358

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

350

359

if(ret == -1){

351

360

perror("sigaddset");

352

exitstatus = EXIT_FAILURE;

361

exitstatus = EX_OSERR;

353

362

goto fallback;

354

363

}

355

364

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

356

365

if(ret == -1){

357

366

perror("sigaction");

358

exitstatus = EXIT_FAILURE;

367

exitstatus = EX_OSERR;

359

368

goto fallback;

360

369

}

361

370

393

402

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

394

403

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

395

404

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

405

/*

406

* These reproduce what we would get without ARGP_NO_HELP

407

*/

408

{ .name = "help", .key = '?',

409

.doc = "Give this help list", .group = -1 },

410

{ .name = "usage", .key = -3,

411

.doc = "Give a short usage message", .group = -1 },

412

{ .name = "version", .key = 'V',

413

.doc = "Print program version", .group = -1 },

396

414

{ .name = NULL }

397

415

};

398

416

399

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

400

struct argp_state *state){

417

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

418

errno = 0;

401

419

switch(key){

402

420

char *tmp;

403

421

intmax_t tmpmax;

404

422

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

405

if(arg != NULL){

423

{

406

424

char *plugin_option;

407

425

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

408

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

409

continue;

410

}

411

426

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

412

perror("add_argument");

413

return ARGP_ERR_UNKNOWN;

427

break;

414

428

}

415

429

}

416

430

}

417

431

break;

418

432

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

419

if(arg == NULL){

420

break;

421

}

422

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

423

perror("add_environment");

424

}

433

add_environment(getplugin(NULL), arg, true);

425

434

break;

426

435

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

427

if(arg != NULL){

428

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

429

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

430

break;

431

}

432

char *plugin_option;

433

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

434

if(not add_argument(getplugin(plugin_name), plugin_option)){

435

perror("add_argument");

436

return ARGP_ERR_UNKNOWN;

436

{

437

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

438

if(option_list == NULL){

439

argp_error(state, "No colon in \"%s\"", arg);

440

errno = EINVAL;

441

break;

442

}

443

*option_list = '\0';

444

option_list++;

445

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

446

argp_error(state, "Empty plugin name");

447

errno = EINVAL;

448

break;

449

}

450

char *option;

451

while((option = strsep(&option_list, ",")) != NULL){

452

if(not add_argument(getplugin(arg), option)){

453

break;

437

454

}

438

455

}

439

456

}

440

457

break;

441

458

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

442

if(arg == NULL){

443

break;

444

}

445

459

{

446

460

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

447

461

if(envdef == NULL){

462

argp_error(state, "No colon in \"%s\"", arg);

463

errno = EINVAL;

448

464

break;

449

465

}

450

466

*envdef = '\0';

451

if(not add_environment(getplugin(arg), envdef+1, true)){

452

perror("add_environment");

467

envdef++;

468

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

469

argp_error(state, "Empty plugin name");

470

errno = EINVAL;

471

break;

453

472

}

473

add_environment(getplugin(arg), envdef, true);

454

474

}

455

475

break;

456

476

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

457

if(arg != NULL){

477

{

458

478

plugin *p = getplugin(arg);

459

if(p == NULL){

460

return ARGP_ERR_UNKNOWN;

479

if(p != NULL){

480

p->disabled = true;

461

481

}

462

p->disabled = true;

463

482

}

464

483

break;

465

484

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

466

if(arg != NULL){

485

{

467

486

plugin *p = getplugin(arg);

468

if(p == NULL){

469

return ARGP_ERR_UNKNOWN;

487

if(p != NULL){

488

p->disabled = false;

470

489

}

471

p->disabled = false;

472

490

}

473

491

break;

474

492

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

475

493

free(plugindir);

476

494

plugindir = strdup(arg);

477

if(plugindir == NULL){

478

perror("strdup");

479

}

480

495

break;

481

496

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

482

497

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

483

498

break;

484

499

case 130: /* --userid */

485

errno = 0;

486

500

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

487

501

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

488

502

or tmpmax != (uid_t)tmpmax){

489

fprintf(stderr, "Bad user ID number: \"%s\", using %"

490

PRIdMAX "\n", arg, (intmax_t)uid);

491

} else {

492

uid = (uid_t)tmpmax;

503

argp_error(state, "Bad user ID number: \"%s\", using %"

504

PRIdMAX, arg, (intmax_t)uid);

505

break;

493

506

}

507

uid = (uid_t)tmpmax;

494

508

break;

495

509

case 131: /* --groupid */

496

errno = 0;

497

510

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

498

511

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

499

512

or tmpmax != (gid_t)tmpmax){

500

fprintf(stderr, "Bad group ID number: \"%s\", using %"

501

PRIdMAX "\n", arg, (intmax_t)gid);

502

} else {

503

gid = (gid_t)tmpmax;

513

argp_error(state, "Bad group ID number: \"%s\", using %"

514

PRIdMAX, arg, (intmax_t)gid);

515

break;

504

516

}

517

gid = (gid_t)tmpmax;

505

518

break;

506

519

case 132: /* --debug */

507

520

debug = true;

508

521

break;

522

/*

523

* These reproduce what we would get without ARGP_NO_HELP

524

*/

525

case '?': /* --help */

526

state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */

527

argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);

528

case -3: /* --usage */

529

state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */

530

argp_state_help(state, state->out_stream,

531

ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);

532

case 'V': /* --version */

533

fprintf(state->out_stream, "%s\n", argp_program_version);

534

exit(EXIT_SUCCESS);

535

break;

509

536

/*

510

537

* When adding more options before this line, remember to also add a

511

538

* "case" to the "parse_opt_config_file" function below.

514

541

/* Cryptsetup always passes an argument, which is an empty

515

542

string if "none" was specified in /etc/crypttab. So if

516

543

argument was empty, we ignore it silently. */

517

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

518

fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);

544

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

545

break;

519

546

}

520

break;

521

case ARGP_KEY_END:

522

break;

523

547

default:

524

548

return ARGP_ERR_UNKNOWN;

525

549

}

526

return 0;

550

return errno; /* Set to 0 at start */

527

551

}

528

552

529

553

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

531

555

error_t parse_opt_config_file(int key, char *arg,

532

556

__attribute__((unused))

533

557

struct argp_state *state){

558

errno = 0;

534

559

switch(key){

535

560

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

536

561

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

543

568

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

544

569

free(argfile);

545

570

argfile = strdup(arg);

546

if(argfile == NULL){

547

perror("strdup");

548

}

549

571

break;

550

572

case 130: /* --userid */

551

573

case 131: /* --groupid */

552

574

case 132: /* --debug */

575

case '?': /* --help */

576

case -3: /* --usage */

577

case 'V': /* --version */

553

578

case ARGP_KEY_ARG:

554

case ARGP_KEY_END:

555

579

break;

556

580

default:

557

581

return ARGP_ERR_UNKNOWN;

558

582

}

559

return 0;

583

return errno;

560

584

}

561

585

562

586

struct argp argp = { .options = options,

566

590

567

591

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

568

592

config file location, if any. */

569

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

570

if(ret == ARGP_ERR_UNKNOWN){

571

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

572

exitstatus = EXIT_FAILURE;

593

ret = argp_parse(&argp, argc, argv,

594

ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,

595

NULL, NULL);

596

switch(ret){

597

case 0:

598

break;

599

case ENOMEM:

600

default:

601

errno = ret;

602

perror("argp_parse");

603

exitstatus = EX_OSERR;

604

goto fallback;

605

case EINVAL:

606

exitstatus = EX_USAGE;

573

607

goto fallback;

574

608

}

575

609

593

627

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

594

628

if(custom_argv == NULL){

595

629

perror("malloc");

596

exitstatus = EXIT_FAILURE;

630

exitstatus = EX_OSERR;

597

631

goto fallback;

598

632

}

599

633

custom_argv[0] = argv[0];

616

650

new_arg = strdup(p);

617

651

if(new_arg == NULL){

618

652

perror("strdup");

619

exitstatus = EXIT_FAILURE;

653

exitstatus = EX_OSERR;

620

654

free(org_line);

621

655

goto fallback;

622

656

}

626

660

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

627

661

if(custom_argv == NULL){

628

662

perror("realloc");

629

exitstatus = EXIT_FAILURE;

663

exitstatus = EX_OSERR;

630

664

free(org_line);

631

665

goto fallback;

632

666

}

639

673

} while(ret == EOF and errno == EINTR);

640

674

if(ret == EOF){

641

675

perror("fclose");

642

exitstatus = EXIT_FAILURE;

676

exitstatus = EX_IOERR;

643

677

goto fallback;

644

678

}

645

679

free(org_line);

648

682

not affect opening plugins */

649

683

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

650

684

perror("fopen");

651

exitstatus = EXIT_FAILURE;

685

exitstatus = EX_OSERR;

652

686

goto fallback;

653

687

}

654

688

}

655

/* If there was any arguments from configuration file,

656

pass them to parser as command arguments */

689

/* If there were any arguments from the configuration file, pass

690

them to parser as command line arguments */

657

691

if(custom_argv != NULL){

658

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

659

0, NULL);

660

if(ret == ARGP_ERR_UNKNOWN){

661

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

662

exitstatus = EXIT_FAILURE;

692

ret = argp_parse(&argp, custom_argc, custom_argv,

693

ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,

694

NULL, NULL);

695

switch(ret){

696

case 0:

697

break;

698

case ENOMEM:

699

default:

700

errno = ret;

701

perror("argp_parse");

702

exitstatus = EX_OSERR;

703

goto fallback;

704

case EINVAL:

705

exitstatus = EX_CONFIG;

663

706

goto fallback;

664

707

}

665

708

}

666

709

667

710

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

668

711

config file */

669

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

670

if(ret == ARGP_ERR_UNKNOWN){

671

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

672

exitstatus = EXIT_FAILURE;

712

ret = argp_parse(&argp, argc, argv,

713

ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,

714

NULL, NULL);

715

switch(ret){

716

case 0:

717

break;

718

case ENOMEM:

719

default:

720

errno = ret;

721

perror("argp_parse");

722

exitstatus = EX_OSERR;

723

goto fallback;

724

case EINVAL:

725

exitstatus = EX_USAGE;

673

726

goto fallback;

674

727

}

675

728

697

750

perror("setuid");

698

751

}

699

752

700

if(plugindir == NULL){

701

dir = opendir(PDIR);

702

} else {

703

dir = opendir(plugindir);

704

}

705

706

if(dir == NULL){

707

perror("Could not open plugin dir");

708

exitstatus = EXIT_FAILURE;

709

goto fallback;

710

}

711

712

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

753

/* Open plugin directory with close_on_exec flag */

713

754

{

714

int dir_fd = dirfd(dir);

715

if(dir_fd >= 0){

716

ret = set_cloexec_flag(dir_fd);

717

if(ret < 0){

718

perror("set_cloexec_flag");

719

exitstatus = EXIT_FAILURE;

720

goto fallback;

721

}

755

int dir_fd = -1;

756

if(plugindir == NULL){

757

dir_fd = open(PDIR, O_RDONLY |

758

#ifdef O_CLOEXEC

759

O_CLOEXEC

760

#else /* not O_CLOEXEC */

761

0

762

#endif /* not O_CLOEXEC */

763

);

764

} else {

765

dir_fd = open(plugindir, O_RDONLY |

766

#ifdef O_CLOEXEC

767

O_CLOEXEC

768

#else /* not O_CLOEXEC */

769

0

770

#endif /* not O_CLOEXEC */

771

);

772

}

773

if(dir_fd == -1){

774

perror("Could not open plugin dir");

775

exitstatus = EX_UNAVAILABLE;

776

goto fallback;

777

}

778

779

#ifndef O_CLOEXEC

780

/* Set the FD_CLOEXEC flag on the directory */

781

ret = set_cloexec_flag(dir_fd);

782

if(ret < 0){

783

perror("set_cloexec_flag");

784

TEMP_FAILURE_RETRY(close(dir_fd));

785

exitstatus = EX_OSERR;

786

goto fallback;

787

}

788

#endif /* O_CLOEXEC */

789

790

dir = fdopendir(dir_fd);

791

if(dir == NULL){

792

perror("Could not open plugin dir");

793

TEMP_FAILURE_RETRY(close(dir_fd));

794

exitstatus = EX_OSERR;

795

goto fallback;

722

796

}

723

797

}

724

798

734

808

if(dirst == NULL){

735

809

if(errno == EBADF){

736

810

perror("readdir");

737

exitstatus = EXIT_FAILURE;

811

exitstatus = EX_IOERR;

738

812

goto fallback;

739

813

}

740

814

break;

770

844

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

771

845

size_t suf_len = strlen(*suf);

772

846

if((d_name_len >= suf_len)

773

and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)

847

and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)

774

848

== 0)){

775

849

if(debug){

776

850

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

788

862

789

863

char *filename;

790

864

if(plugindir == NULL){

791

ret = TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",

792

dirst->d_name));

865

ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",

866

dirst->d_name));

793

867

} else {

794

ret = TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s", plugindir,

795

dirst->d_name));

868

ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",

869

plugindir,

870

dirst->d_name));

796

871

}

797

872

if(ret < 0){

798

873

perror("asprintf");

799

874

continue;

800

875

}

801

876

802

ret = TEMP_FAILURE_RETRY(stat(filename, &st));

877

ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));

803

878

if(ret == -1){

804

879

perror("stat");

805

880

free(filename);

860

935

}

861

936

862

937

int pipefd[2];

863

ret = TEMP_FAILURE_RETRY(pipe(pipefd));

938

ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));

864

939

if(ret == -1){

865

940

perror("pipe");

866

exitstatus = EXIT_FAILURE;

941

exitstatus = EX_OSERR;

867

942

goto fallback;

868

943

}

869

944

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

870

945

ret = set_cloexec_flag(pipefd[0]);

871

946

if(ret < 0){

872

947

perror("set_cloexec_flag");

873

exitstatus = EXIT_FAILURE;

948

exitstatus = EX_OSERR;

874

949

goto fallback;

875

950

}

876

951

ret = set_cloexec_flag(pipefd[1]);

877

952

if(ret < 0){

878

953

perror("set_cloexec_flag");

879

exitstatus = EXIT_FAILURE;

954

exitstatus = EX_OSERR;

880

955

goto fallback;

881

956

}

882

957

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

883

ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,

884

&sigchld_action.sa_mask,

885

NULL));

958

ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,

959

&sigchld_action.sa_mask,

960

NULL));

886

961

if(ret < 0){

887

962

perror("sigprocmask");

888

exitstatus = EXIT_FAILURE;

963

exitstatus = EX_OSERR;

889

964

goto fallback;

890

965

}

891

966

/* Starting a new process to be watched */

895

970

} while(pid == -1 and errno == EINTR);

896

971

if(pid == -1){

897

972

perror("fork");

898

exitstatus = EXIT_FAILURE;

973

exitstatus = EX_OSERR;

899

974

goto fallback;

900

975

}

901

976

if(pid == 0){

903

978

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

904

979

if(ret < 0){

905

980

perror("sigaction");

906

_exit(EXIT_FAILURE);

981

_exit(EX_OSERR);

907

982

}

908

983

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

909

984

if(ret < 0){

910

985

perror("sigprocmask");

911

_exit(EXIT_FAILURE);

986

_exit(EX_OSERR);

912

987

}

913

988

914

989

ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */

915

990

if(ret == -1){

916

991

perror("dup2");

917

_exit(EXIT_FAILURE);

992

_exit(EX_OSERR);

918

993

}

919

994

920

995

if(dirfd(dir) < 0){

925

1000

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

926

1001

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

927

1002

perror("execv");

928

_exit(EXIT_FAILURE);

1003

_exit(EX_OSERR);

929

1004

}

930

1005

} else {

931

1006

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

932

1007

perror("execve");

933

_exit(EXIT_FAILURE);

1008

_exit(EX_OSERR);

934

1009

}

935

1010

}

936

1011

/* no return */

942

1017

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

943

1018

if(new_plugin == NULL){

944

1019

perror("getplugin");

945

ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,

946

&sigchld_action.sa_mask,

947

NULL));

1020

ret = (int)(TEMP_FAILURE_RETRY

1021

(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,

1022

NULL)));

948

1023

if(ret < 0){

949

1024

perror("sigprocmask");

950

1025

}

951

exitstatus = EXIT_FAILURE;

1026

exitstatus = EX_OSERR;

952

1027

goto fallback;

953

1028

}

954

1029

957

1032

958

1033

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

959

1034

has already completed */

960

ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,

961

&sigchld_action.sa_mask,

962

NULL));

1035

ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,

1036

&sigchld_action.sa_mask,

1037

NULL));

963

1038

if(ret < 0){

964

1039

perror("sigprocmask");

965

exitstatus = EXIT_FAILURE;

1040

exitstatus = EX_OSERR;

966

1041

goto fallback;

967

1042

}

968

1043

969

FD_SET(new_plugin->fd, &rfds_all);

1044

FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from

1045

-Wconversion */

970

1046

971

1047

if(maxfd < new_plugin->fd){

972

1048

maxfd = new_plugin->fd;

994

1070

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

995

1071

if(select_ret == -1 and errno != EINTR){

996

1072

perror("select");

997

exitstatus = EXIT_FAILURE;

1073

exitstatus = EX_OSERR;

998

1074

goto fallback;

999

1075

}

1000

1076

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

1026

1102

}

1027

1103

1028

1104

/* Remove the plugin */

1029

FD_CLR(proc->fd, &rfds_all);

1105

FD_CLR(proc->fd, &rfds_all); /* Spurious warning from

1106

-Wconversion */

1030

1107

1031

1108

/* Block signal while modifying process_list */

1032

ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,

1033

&sigchld_action.sa_mask,

1034

NULL));

1109

ret = (int)TEMP_FAILURE_RETRY(sigprocmask

1110

(SIG_BLOCK,

1111

&sigchld_action.sa_mask,

1112

NULL));

1035

1113

if(ret < 0){

1036

1114

perror("sigprocmask");

1037

exitstatus = EXIT_FAILURE;

1115

exitstatus = EX_OSERR;

1038

1116

goto fallback;

1039

1117

}

1040

1118

1043

1121

proc = next_plugin;

1044

1122

1045

1123

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

1046

ret = TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,

1047

&sigchld_action.sa_mask,

1048

NULL));

1124

ret = (int)(TEMP_FAILURE_RETRY

1125

(sigprocmask(SIG_UNBLOCK,

1126

&sigchld_action.sa_mask, NULL)));

1049

1127

if(ret < 0){

1050

1128

perror("sigprocmask");

1051

exitstatus = EXIT_FAILURE;

1129

exitstatus = EX_OSERR;

1052

1130

goto fallback;

1053

1131

}

1054

1132

1065

1143

proc->buffer_length);

1066

1144

if(not bret){

1067

1145

perror("print_out_password");

1068

exitstatus = EXIT_FAILURE;

1146

exitstatus = EX_IOERR;

1069

1147

}

1070

1148

goto fallback;

1071

1149

}

1072

1150

1073

1151

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

1074

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

1152

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

1153

warning from

1154

-Wconversion */

1075

1155

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

1076

1156

proc = proc->next;

1077

1157

continue;

1082

1162

+ (size_t) BUFFER_SIZE);

1083

1163

if(proc->buffer == NULL){

1084

1164

perror("malloc");

1085

exitstatus = EXIT_FAILURE;

1165

exitstatus = EX_OSERR;

1086

1166

goto fallback;

1087

1167

}

1088

1168

proc->buffer_size += BUFFER_SIZE;

1109

1189

1110

1190

fallback:

1111

1191

1112

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

1192

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

1193

and exitstatus != EX_OK)){

1113

1194

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

1114

1195

occured */

1115

1196

bool bret;

1124

1205

bret = print_out_password(passwordbuffer, len);

1125

1206

if(not bret){

1126

1207

perror("print_out_password");

1127

exitstatus = EXIT_FAILURE;

1208

exitstatus = EX_IOERR;

1128

1209

}

1129

1210

}

1130

1211

1132

1213

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

1133

1214

if(ret == -1){

1134

1215

perror("sigaction");

1135

exitstatus = EXIT_FAILURE;

1216

exitstatus = EX_OSERR;

1136

1217

}

1137

1218

1138

1219

if(custom_argv != NULL){