/mandos/trunk : revision 451

2

/*

3

* Mandos plugin runner - Run Mandos plugins

4

*

5

6

5

6

7

*

8

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

9

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

25

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

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(),

31

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

32

stderr, STDOUT_FILENO */

33

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

34

stat, waitpid(), WIFEXITED(),

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 */

73

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

74

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

71

75

72

76

#define BUFFER_SIZE 256

73

77

102

106

/* Gets an existing plugin based on name,

103

107

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

104

108

static plugin *getplugin(char *name){

105

/* Check for exiting plugin with that name */

109

/* Check for existing plugin with that name */

106

110

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

107

111

if((p->name == name)

108

112

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

123

127

copy_name = strdup(name);

124

128

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

125

129

if(copy_name == NULL){

130

int e = errno;

126

131

free(new_plugin);

132

errno = e;

127

133

return NULL;

128

134

}

129

135

}

137

143

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

138

144

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

139

145

if(new_plugin->argv == NULL){

146

int e = errno;

140

147

free(copy_name);

141

148

free(new_plugin);

149

errno = e;

142

150

return NULL;

143

151

}

144

152

new_plugin->argv[0] = copy_name;

148

156

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

149

157

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

150

158

if(new_plugin->environ == NULL){

159

int e = errno;

151

160

free(copy_name);

152

161

free(new_plugin->argv);

153

162

free(new_plugin);

163

errno = e;

154

164

return NULL;

155

165

}

156

166

new_plugin->environ[0] = NULL;

258

268

/* No child processes */

259

269

break;

260

270

}

261

perror("waitpid");

271

error(0, errno, "waitpid");

262

272

}

263

273

264

274

/* A child exited, find it in process_list */

349

359

sigemptyset(&sigchld_action.sa_mask);

350

360

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

351

361

if(ret == -1){

352

perror("sigaddset");

353

exitstatus = EXIT_FAILURE;

362

error(0, errno, "sigaddset");

363

exitstatus = EX_OSERR;

354

364

goto fallback;

355

365

}

356

366

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

357

367

if(ret == -1){

358

perror("sigaction");

359

exitstatus = EXIT_FAILURE;

368

error(0, errno, "sigaction");

369

exitstatus = EX_OSERR;

360

370

goto fallback;

361

371

}

362

372

394

404

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

395

405

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

396

406

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

407

/*

408

* These reproduce what we would get without ARGP_NO_HELP

409

*/

410

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

411

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

412

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

413

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

414

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

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

397

416

{ .name = NULL }

398

417

};

399

418

400

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

401

struct argp_state *state){

419

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

420

errno = 0;

402

421

switch(key){

403

422

char *tmp;

404

423

intmax_t tmpmax;

405

424

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

406

if(arg != NULL){

425

{

407

426

char *plugin_option;

408

427

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

409

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

410

continue;

411

}

412

428

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

413

perror("add_argument");

414

return ARGP_ERR_UNKNOWN;

429

break;

415

430

}

416

431

}

417

432

}

418

433

break;

419

434

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

420

if(arg == NULL){

421

break;

422

}

423

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

424

perror("add_environment");

425

}

435

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

426

436

break;

427

437

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

428

if(arg != NULL){

429

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

430

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

431

break;

432

}

433

char *plugin_option;

434

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

435

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

436

perror("add_argument");

437

return ARGP_ERR_UNKNOWN;

438

{

439

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

440

if(option_list == NULL){

441

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

442

errno = EINVAL;

443

break;

444

}

445

*option_list = '\0';

446

option_list++;

447

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

448

argp_error(state, "Empty plugin name");

449

errno = EINVAL;

450

break;

451

}

452

char *option;

453

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

454

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

455

break;

438

456

}

439

457

}

440

458

}

441

459

break;

442

460

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

443

if(arg == NULL){

444

break;

445

}

446

461

{

447

462

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

448

463

if(envdef == NULL){

464

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

465

errno = EINVAL;

449

466

break;

450

467

}

451

468

*envdef = '\0';

452

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

453

perror("add_environment");

469

envdef++;

470

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

471

argp_error(state, "Empty plugin name");

472

errno = EINVAL;

473

break;

454

474

}

475

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

455

476

}

456

477

break;

457

478

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

458

if(arg != NULL){

479

{

459

480

plugin *p = getplugin(arg);

460

if(p == NULL){

461

return ARGP_ERR_UNKNOWN;

481

if(p != NULL){

482

p->disabled = true;

462

483

}

463

p->disabled = true;

464

484

}

465

485

break;

466

486

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

467

if(arg != NULL){

487

{

468

488

plugin *p = getplugin(arg);

469

if(p == NULL){

470

return ARGP_ERR_UNKNOWN;

489

if(p != NULL){

490

p->disabled = false;

471

491

}

472

p->disabled = false;

473

492

}

474

493

break;

475

494

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

476

495

free(plugindir);

477

496

plugindir = strdup(arg);

478

if(plugindir == NULL){

479

perror("strdup");

480

}

481

497

break;

482

498

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

483

499

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

484

500

break;

485

501

case 130: /* --userid */

486

errno = 0;

487

502

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

488

503

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

489

504

or tmpmax != (uid_t)tmpmax){

490

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

491

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

492

} else {

493

uid = (uid_t)tmpmax;

505

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

506

PRIdMAX, arg, (intmax_t)uid);

507

break;

494

508

}

509

uid = (uid_t)tmpmax;

495

510

break;

496

511

case 131: /* --groupid */

497

errno = 0;

498

512

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

499

513

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

500

514

or tmpmax != (gid_t)tmpmax){

501

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

502

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

503

} else {

504

gid = (gid_t)tmpmax;

515

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

516

PRIdMAX, arg, (intmax_t)gid);

517

break;

505

518

}

519

gid = (gid_t)tmpmax;

506

520

break;

507

521

case 132: /* --debug */

508

522

debug = true;

509

523

break;

524

/*

525

* These reproduce what we would get without ARGP_NO_HELP

526

*/

527

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

528

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

529

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

530

case -3: /* --usage */

531

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

532

argp_state_help(state, state->out_stream,

533

ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);

534

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

535

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

536

exit(EXIT_SUCCESS);

537

break;

510

538

/*

511

539

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

512

540

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

515

543

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

516

544

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

517

545

argument was empty, we ignore it silently. */

518

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

519

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

546

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

547

break;

520

548

}

521

break;

522

case ARGP_KEY_END:

523

break;

524

549

default:

525

550

return ARGP_ERR_UNKNOWN;

526

551

}

527

return 0;

552

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

528

553

}

529

554

530

555

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

532

557

error_t parse_opt_config_file(int key, char *arg,

533

558

__attribute__((unused))

534

559

struct argp_state *state){

560

errno = 0;

535

561

switch(key){

536

562

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

537

563

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

544

570

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

545

571

free(argfile);

546

572

argfile = strdup(arg);

547

if(argfile == NULL){

548

perror("strdup");

549

}

550

573

break;

551

574

case 130: /* --userid */

552

575

case 131: /* --groupid */

553

576

case 132: /* --debug */

577

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

578

case -3: /* --usage */

579

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

554

580

case ARGP_KEY_ARG:

555

case ARGP_KEY_END:

556

581

break;

557

582

default:

558

583

return ARGP_ERR_UNKNOWN;

559

584

}

560

return 0;

585

return errno;

561

586

}

562

587

563

588

struct argp argp = { .options = options,

567

592

568

593

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

569

594

config file location, if any. */

570

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

571

if(ret == ARGP_ERR_UNKNOWN){

572

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

573

exitstatus = EXIT_FAILURE;

595

ret = argp_parse(&argp, argc, argv,

596

ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,

597

NULL, NULL);

598

switch(ret){

599

case 0:

600

break;

601

case ENOMEM:

602

default:

603

errno = ret;

604

error(0, errno, "argp_parse");

605

exitstatus = EX_OSERR;

606

goto fallback;

607

case EINVAL:

608

exitstatus = EX_USAGE;

574

609

goto fallback;

575

610

}

576

611

593

628

custom_argc = 1;

594

629

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

595

630

if(custom_argv == NULL){

596

perror("malloc");

597

exitstatus = EXIT_FAILURE;

631

error(0, errno, "malloc");

632

exitstatus = EX_OSERR;

598

633

goto fallback;

599

634

}

600

635

custom_argv[0] = argv[0];

616

651

}

617

652

new_arg = strdup(p);

618

653

if(new_arg == NULL){

619

perror("strdup");

620

exitstatus = EXIT_FAILURE;

654

error(0, errno, "strdup");

655

exitstatus = EX_OSERR;

621

656

free(org_line);

622

657

goto fallback;

623

658

}

626

661

custom_argv = realloc(custom_argv, sizeof(char *)

627

662

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

628

663

if(custom_argv == NULL){

629

perror("realloc");

630

exitstatus = EXIT_FAILURE;

664

error(0, errno, "realloc");

665

exitstatus = EX_OSERR;

631

666

free(org_line);

632

667

goto fallback;

633

668

}

639

674

ret = fclose(conffp);

640

675

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

641

676

if(ret == EOF){

642

perror("fclose");

643

exitstatus = EXIT_FAILURE;

677

error(0, errno, "fclose");

678

exitstatus = EX_IOERR;

644

679

goto fallback;

645

680

}

646

681

free(org_line);

648

683

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

649

684

not affect opening plugins */

650

685

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

651

perror("fopen");

652

exitstatus = EXIT_FAILURE;

686

error(0, errno, "fopen");

687

exitstatus = EX_OSERR;

653

688

goto fallback;

654

689

}

655

690

}

656

/* If there was any arguments from configuration file,

657

pass them to parser as command arguments */

691

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

692

them to parser as command line arguments */

658

693

if(custom_argv != NULL){

659

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

660

0, NULL);

661

if(ret == ARGP_ERR_UNKNOWN){

662

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

663

exitstatus = EXIT_FAILURE;

694

ret = argp_parse(&argp, custom_argc, custom_argv,

695

ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,

696

NULL, NULL);

697

switch(ret){

698

case 0:

699

break;

700

case ENOMEM:

701

default:

702

errno = ret;

703

error(0, errno, "argp_parse");

704

exitstatus = EX_OSERR;

705

goto fallback;

706

case EINVAL:

707

exitstatus = EX_CONFIG;

664

708

goto fallback;

665

709

}

666

710

}

667

711

668

712

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

669

713

config file */

670

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

671

if(ret == ARGP_ERR_UNKNOWN){

672

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

673

exitstatus = EXIT_FAILURE;

714

ret = argp_parse(&argp, argc, argv,

715

ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,

716

NULL, NULL);

717

switch(ret){

718

case 0:

719

break;

720

case ENOMEM:

721

default:

722

errno = ret;

723

error(0, errno, "argp_parse");

724

exitstatus = EX_OSERR;

725

goto fallback;

726

case EINVAL:

727

exitstatus = EX_USAGE;

674

728

goto fallback;

675

729

}

676

730

691

745

/* Strip permissions down to nobody */

692

746

setgid(gid);

693

747

if(ret == -1){

694

perror("setgid");

748

error(0, errno, "setgid");

695

749

}

696

750

ret = setuid(uid);

697

751

if(ret == -1){

698

perror("setuid");

752

error(0, errno, "setuid");

699

753

}

700

754

701

755

/* Open plugin directory with close_on_exec flag */

719

773

);

720

774

}

721

775

if(dir_fd == -1){

722

perror("Could not open plugin dir");

723

exitstatus = EXIT_FAILURE;

776

error(0, errno, "Could not open plugin dir");

777

exitstatus = EX_UNAVAILABLE;

724

778

goto fallback;

725

779

}

726

780

728

782

/* Set the FD_CLOEXEC flag on the directory */

729

783

ret = set_cloexec_flag(dir_fd);

730

784

if(ret < 0){

731

perror("set_cloexec_flag");

785

error(0, errno, "set_cloexec_flag");

732

786

TEMP_FAILURE_RETRY(close(dir_fd));

733

exitstatus = EXIT_FAILURE;

787

exitstatus = EX_OSERR;

734

788

goto fallback;

735

789

}

736

790

#endif /* O_CLOEXEC */

737

791

738

792

dir = fdopendir(dir_fd);

739

793

if(dir == NULL){

740

perror("Could not open plugin dir");

794

error(0, errno, "Could not open plugin dir");

741

795

TEMP_FAILURE_RETRY(close(dir_fd));

742

exitstatus = EXIT_FAILURE;

796

exitstatus = EX_OSERR;

743

797

goto fallback;

744

798

}

745

799

}

755

809

/* All directory entries have been processed */

756

810

if(dirst == NULL){

757

811

if(errno == EBADF){

758

perror("readdir");

759

exitstatus = EXIT_FAILURE;

812

error(0, errno, "readdir");

813

exitstatus = EX_IOERR;

760

814

goto fallback;

761

815

}

762

816

break;

792

846

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

793

847

size_t suf_len = strlen(*suf);

794

848

if((d_name_len >= suf_len)

795

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

849

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

796

850

== 0)){

797

851

if(debug){

798

852

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

818

872

dirst->d_name));

819

873

}

820

874

if(ret < 0){

821

perror("asprintf");

875

error(0, errno, "asprintf");

822

876

continue;

823

877

}

824

878

825

879

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

826

880

if(ret == -1){

827

perror("stat");

881

error(0, errno, "stat");

828

882

free(filename);

829

883

continue;

830

884

}

842

896

843

897

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

844

898

if(p == NULL){

845

perror("getplugin");

899

error(0, errno, "getplugin");

846

900

free(filename);

847

901

continue;

848

902

}

860

914

if(g != NULL){

861

915

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

862

916

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

863

perror("add_argument");

917

error(0, errno, "add_argument");

864

918

}

865

919

}

866

920

/* Add global environment variables */

867

921

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

868

922

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

869

perror("add_environment");

923

error(0, errno, "add_environment");

870

924

}

871

925

}

872

926

}

877

931

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

878

932

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

879

933

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

880

perror("add_environment");

934

error(0, errno, "add_environment");

881

935

}

882

936

}

883

937

}

885

939

int pipefd[2];

886

940

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

887

941

if(ret == -1){

888

perror("pipe");

889

exitstatus = EXIT_FAILURE;

942

error(0, errno, "pipe");

943

exitstatus = EX_OSERR;

890

944

goto fallback;

891

945

}

892

946

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

893

947

ret = set_cloexec_flag(pipefd[0]);

894

948

if(ret < 0){

895

perror("set_cloexec_flag");

896

exitstatus = EXIT_FAILURE;

949

error(0, errno, "set_cloexec_flag");

950

exitstatus = EX_OSERR;

897

951

goto fallback;

898

952

}

899

953

ret = set_cloexec_flag(pipefd[1]);

900

954

if(ret < 0){

901

perror("set_cloexec_flag");

902

exitstatus = EXIT_FAILURE;

955

error(0, errno, "set_cloexec_flag");

956

exitstatus = EX_OSERR;

903

957

goto fallback;

904

958

}

905

959

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

907

961

&sigchld_action.sa_mask,

908

962

NULL));

909

963

if(ret < 0){

910

perror("sigprocmask");

911

exitstatus = EXIT_FAILURE;

964

error(0, errno, "sigprocmask");

965

exitstatus = EX_OSERR;

912

966

goto fallback;

913

967

}

914

968

/* Starting a new process to be watched */

917

971

pid = fork();

918

972

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

919

973

if(pid == -1){

920

perror("fork");

921

exitstatus = EXIT_FAILURE;

974

error(0, errno, "fork");

975

exitstatus = EX_OSERR;

922

976

goto fallback;

923

977

}

924

978

if(pid == 0){

925

979

/* this is the child process */

926

980

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

927

981

if(ret < 0){

928

perror("sigaction");

929

_exit(EXIT_FAILURE);

982

error(0, errno, "sigaction");

983

_exit(EX_OSERR);

930

984

}

931

985

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

932

986

if(ret < 0){

933

perror("sigprocmask");

934

_exit(EXIT_FAILURE);

987

error(0, errno, "sigprocmask");

988

_exit(EX_OSERR);

935

989

}

936

990

937

991

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

938

992

if(ret == -1){

939

perror("dup2");

940

_exit(EXIT_FAILURE);

993

error(0, errno, "dup2");

994

_exit(EX_OSERR);

941

995

}

942

996

943

997

if(dirfd(dir) < 0){

947

1001

}

948

1002

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

949

1003

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

950

perror("execv");

951

_exit(EXIT_FAILURE);

1004

error(0, errno, "execv for %s", filename);

1005

_exit(EX_OSERR);

952

1006

}

953

1007

} else {

954

1008

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

955

perror("execve");

956

_exit(EXIT_FAILURE);

1009

error(0, errno, "execve for %s", filename);

1010

_exit(EX_OSERR);

957

1011

}

958

1012

}

959

1013

/* no return */

964

1018

free(filename);

965

1019

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

966

1020

if(new_plugin == NULL){

967

perror("getplugin");

1021

error(0, errno, "getplugin");

968

1022

ret = (int)(TEMP_FAILURE_RETRY

969

1023

(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,

970

1024

NULL)));

971

1025

if(ret < 0){

972

perror("sigprocmask");

1026

error(0, errno, "sigprocmask");

973

1027

}

974

exitstatus = EXIT_FAILURE;

1028

exitstatus = EX_OSERR;

975

1029

goto fallback;

976

1030

}

977

1031

984

1038

&sigchld_action.sa_mask,

985

1039

NULL));

986

1040

if(ret < 0){

987

perror("sigprocmask");

988

exitstatus = EXIT_FAILURE;

1041

error(0, errno, "sigprocmask");

1042

exitstatus = EX_OSERR;

989

1043

goto fallback;

990

1044

}

991

1045

1017

1071

fd_set rfds = rfds_all;

1018

1072

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

1019

1073

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

1020

perror("select");

1021

exitstatus = EXIT_FAILURE;

1074

error(0, errno, "select");

1075

exitstatus = EX_OSERR;

1022

1076

goto fallback;

1023

1077

}

1024

1078

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

1059

1113

&sigchld_action.sa_mask,

1060

1114

NULL));

1061

1115

if(ret < 0){

1062

perror("sigprocmask");

1063

exitstatus = EXIT_FAILURE;

1116

error(0, errno, "sigprocmask");

1117

exitstatus = EX_OSERR;

1064

1118

goto fallback;

1065

1119

}

1066

1120

1073

1127

(sigprocmask(SIG_UNBLOCK,

1074

1128

&sigchld_action.sa_mask, NULL)));

1075

1129

if(ret < 0){

1076

perror("sigprocmask");

1077

exitstatus = EXIT_FAILURE;

1130

error(0, errno, "sigprocmask");

1131

exitstatus = EX_OSERR;

1078

1132

goto fallback;

1079

1133

}

1080

1134

1090

1144

bool bret = print_out_password(proc->buffer,

1091

1145

proc->buffer_length);

1092

1146

if(not bret){

1093

perror("print_out_password");

1094

exitstatus = EXIT_FAILURE;

1147

error(0, errno, "print_out_password");

1148

exitstatus = EX_IOERR;

1095

1149

}

1096

1150

goto fallback;

1097

1151

}

1109

1163

proc->buffer = realloc(proc->buffer, proc->buffer_size

1110

1164

+ (size_t) BUFFER_SIZE);

1111

1165

if(proc->buffer == NULL){

1112

perror("malloc");

1113

exitstatus = EXIT_FAILURE;

1166

error(0, errno, "malloc");

1167

exitstatus = EX_OSERR;

1114

1168

goto fallback;

1115

1169

}

1116

1170

proc->buffer_size += BUFFER_SIZE;

1137

1191

1138

1192

fallback:

1139

1193

1140

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

1194

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

1195

and exitstatus != EX_OK)){

1141

1196

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

1142

1197

occured */

1143

1198

bool bret;

1151

1206

}

1152

1207

bret = print_out_password(passwordbuffer, len);

1153

1208

if(not bret){

1154

perror("print_out_password");

1155

exitstatus = EXIT_FAILURE;

1209

error(0, errno, "print_out_password");

1210

exitstatus = EX_IOERR;

1156

1211

}

1157

1212

}

1158

1213

1159

1214

/* Restore old signal handler */

1160

1215

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

1161

1216

if(ret == -1){

1162

perror("sigaction");

1163

exitstatus = EXIT_FAILURE;

1217

error(0, errno, "sigaction");

1218

exitstatus = EX_OSERR;

1164

1219

}

1165

1220

1166

1221

if(custom_argv != NULL){

1181

1236

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

1182

1237

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

1183

1238

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

1184

perror("kill");

1239

error(0, errno, "kill");

1185

1240

}

1186

1241

}

1187

1242

}

1191

1246

ret = wait(NULL);

1192

1247

} while(ret >= 0);

1193

1248

if(errno != ECHILD){

1194

perror("wait");

1249

error(0, errno, "wait");

1195

1250

}

1196

1251

1197

1252

free_plugin_list();