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/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
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/* -*- coding: utf-8 -*- */
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3
* Mandos plugin runner - Run Mandos plugins
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* Copyright © 2008-2017 Teddy Hogeborn
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* Copyright © 2008-2017 Björn Påhlsson
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* This file is part of Mandos.
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* Mandos is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* Mandos is distributed in the hope that it will be useful, but
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* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful, but
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13
* WITHOUT ANY WARRANTY; without even the implied warranty of
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14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15
* General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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* Contact the authors at <mandos@recompile.se>.
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* Contact the authors at <mandos@fukt.bsnet.se>.
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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
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#include <stddef.h> /* size_t, NULL */
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#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
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#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
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EXIT_SUCCESS, realloc() */
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#include <stdbool.h> /* bool, true, false */
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#include <stdio.h> /* fileno(), fprintf(),
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stderr, STDOUT_FILENO, fclose() */
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#include <sys/types.h> /* fstat(), struct stat, waitpid(),
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WIFEXITED(), WEXITSTATUS(), wait(),
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pid_t, uid_t, gid_t, getuid(),
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#include <stdio.h> /* perror, popen(), fileno(),
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fprintf(), stderr, STDOUT_FILENO */
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#include <sys/types.h> /* DIR, opendir(), stat(), struct
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stat, waitpid(), WIFEXITED(),
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WEXITSTATUS(), wait(), pid_t,
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uid_t, gid_t, getuid(), getgid(),
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#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
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FD_SET(), FD_ISSET(), FD_CLR */
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#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
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WEXITSTATUS(), WTERMSIG() */
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#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
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#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
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#include <iso646.h> /* and, or, not */
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#include <dirent.h> /* struct dirent, scandirat() */
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#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
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FD_CLOEXEC, write(), STDOUT_FILENO,
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struct stat, fstat(), close(),
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setgid(), setuid(), S_ISREG(),
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faccessat() pipe2(), fork(),
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_exit(), dup2(), fexecve(), read()
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#include <dirent.h> /* DIR, struct dirent, opendir(),
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readdir(), closedir(), dirfd() */
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#include <unistd.h> /* struct stat, stat(), S_ISREG(),
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fcntl(), setuid(), setgid(),
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F_GETFD, F_SETFD, FD_CLOEXEC,
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access(), pipe(), fork(), close()
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dup2, STDOUT_FILENO, _exit(),
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execv(), write(), read(),
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#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
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FD_CLOEXEC, openat(), scandirat(),
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#include <string.h> /* strsep, strlen(), strsignal(),
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strcmp(), strncmp() */
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#include <string.h> /* strsep, strlen(), asprintf() */
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#include <errno.h> /* errno */
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#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
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/* Gets an existing plugin based on name,
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or if none is found, creates a new one */
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__attribute__((warn_unused_result))
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static plugin *getplugin(char *name){
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/* Check for existing plugin with that name */
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for(plugin *p = plugin_list; p != NULL; p = p->next){
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or (p->name and name and (strcmp(p->name, name) == 0))){
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/* Check for exiting plugin with that name */
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for (plugin *p = plugin_list; p != NULL; p = p->next){
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if ((p->name == name)
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or (p->name and name and (strcmp(p->name, name) == 0))){
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/* Create a new plugin */
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plugin *new_plugin = NULL;
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new_plugin = malloc(sizeof(plugin));
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} while(new_plugin == NULL and errno == EINTR);
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if(new_plugin == NULL){
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plugin *new_plugin = malloc(sizeof(plugin));
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if (new_plugin == NULL){
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char *copy_name = NULL;
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if(name != NULL){
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copy_name = strdup(name);
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} while(copy_name == NULL and errno == EINTR);
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copy_name = strdup(name);
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if(copy_name == NULL){
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*new_plugin = (plugin){ .name = copy_name,
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.next = plugin_list };
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*new_plugin = (plugin) { .name = copy_name,
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.next = plugin_list };
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new_plugin->argv = malloc(sizeof(char *) * 2);
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} while(new_plugin->argv == NULL and errno == EINTR);
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if(new_plugin->argv == NULL){
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new_plugin->argv = malloc(sizeof(char *) * 2);
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if (new_plugin->argv == NULL){
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free(new_plugin);
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new_plugin->argv[0] = copy_name;
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new_plugin->argv[1] = NULL;
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new_plugin->environ = malloc(sizeof(char *));
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} while(new_plugin->environ == NULL and errno == EINTR);
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new_plugin->environ = malloc(sizeof(char *));
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if(new_plugin->environ == NULL){
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free(new_plugin->argv);
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free(new_plugin);
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new_plugin->environ[0] = NULL;
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.doc = "Group ID the plugins will run as", .group = 3 },
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{ .name = "debug", .key = 132,
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.doc = "Debug mode", .group = 4 },
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{ .name = "plugin-helper-dir", .key = 133,
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.doc = "Specify a different plugin helper directory",
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* These reproduce what we would get without ARGP_NO_HELP
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{ .name = "help", .key = '?',
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.doc = "Give this help list", .group = -1 },
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{ .name = "usage", .key = -3,
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.doc = "Give a short usage message", .group = -1 },
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{ .name = "version", .key = 'V',
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.doc = "Print program version", .group = -1 },
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__attribute__((nonnull(3)))
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error_t parse_opt(int key, char *arg, struct argp_state *state){
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
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struct argp_state *state) {
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case 'g': /* --global-options */
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while((plugin_option = strsep(&arg, ",")) != NULL){
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if(not add_argument(getplugin(NULL), plugin_option)){
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while((p = strsep(&arg, ",")) != NULL){
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if(not add_argument(getplugin(NULL), p)){
387
perror("add_argument");
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return ARGP_ERR_UNKNOWN;
452
393
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
457
401
case 'o': /* --options-for */
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
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argp_error(state, "No colon in \"%s\"", arg);
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argp_error(state, "Empty plugin name");
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while((option = strsep(&option_list, ",")) != NULL){
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if(not add_argument(getplugin(arg), option)){
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char *p_name = strsep(&arg, ":");
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if(p_name[0] == '\0' or arg == NULL){
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char *opt = strsep(&arg, ":");
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if(opt[0] == '\0' or opt == NULL){
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while((p = strsep(&opt, ",")) != NULL){
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if(not add_argument(getplugin(p_name), p)){
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perror("add_argument");
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return ARGP_ERR_UNKNOWN;
481
423
case 'E': /* --env-for */
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428
char *envdef = strchr(arg, ':');
484
429
if(envdef == NULL){
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argp_error(state, "No colon in \"%s\"", arg);
492
argp_error(state, "Empty plugin name");
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if(add_environment(getplugin(arg), envdef, true)){
433
if(not add_environment(getplugin(arg), envdef+1, true)){
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perror("add_environment");
501
438
case 'd': /* --disable */
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440
plugin *p = getplugin(arg);
442
return ARGP_ERR_UNKNOWN;
510
447
case 'e': /* --enable */
512
449
plugin *p = getplugin(arg);
451
return ARGP_ERR_UNKNOWN;
519
456
case 128: /* --plugin-dir */
521
458
plugindir = strdup(arg);
522
if(plugindir != NULL){
459
if(plugindir == NULL){
526
463
case 129: /* --config-file */
527
464
/* This is already done by parse_opt_config_file() */
529
466
case 130: /* --userid */
530
tmp_id = strtoimax(arg, &tmp, 10);
531
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
467
uid = (uid_t)strtol(arg, NULL, 10);
540
469
case 131: /* --groupid */
541
tmp_id = strtoimax(arg, &tmp, 10);
542
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
470
gid = (gid_t)strtol(arg, NULL, 10);
551
472
case 132: /* --debug */
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
562
* These reproduce what we would get without ARGP_NO_HELP
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
576
* When adding more options before this line, remember to also add a
577
* "case" to the "parse_opt_config_file" function below.
579
475
case ARGP_KEY_ARG:
580
476
/* Cryptsetup always passes an argument, which is an empty
581
477
string if "none" was specified in /etc/crypttab. So if
582
478
argument was empty, we ignore it silently. */
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
587
486
return ARGP_ERR_UNKNOWN;
589
return errno; /* Set to 0 at start */
592
491
/* This option parser is the same as parse_opt() above, except it
593
492
ignores everything but the --config-file option. */
594
error_t parse_opt_config_file(int key, char *arg,
595
__attribute__((unused))
596
struct argp_state *state){
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
599
497
case 'g': /* --global-options */
600
498
case 'G': /* --global-env */
601
499
case 'o': /* --options-for */
693
579
new_arg = strdup(p);
694
580
if(new_arg == NULL){
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
582
exitstatus = EXIT_FAILURE;
701
587
custom_argc += 1;
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((size_t)custom_argc + 1));
705
if(new_argv == NULL){
706
error(0, errno, "realloc");
707
exitstatus = EX_OSERR;
712
custom_argv = new_argv;
588
custom_argv = realloc(custom_argv, sizeof(char *)
589
* ((unsigned int) custom_argc + 1));
590
if(custom_argv == NULL){
592
exitstatus = EXIT_FAILURE;
715
596
custom_argv[custom_argc-1] = new_arg;
716
custom_argv[custom_argc] = NULL;
597
custom_argv[custom_argc] = NULL;
720
ret = fclose(conffp);
721
} while(ret == EOF and errno == EINTR);
723
error(0, errno, "fclose");
724
exitstatus = EX_IOERR;
729
602
/* Check for harmful errors and go to fallback. Other errors might
730
603
not affect opening plugins */
731
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
732
error(0, errno, "fopen");
733
exitstatus = EX_OSERR;
604
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
606
exitstatus = EXIT_FAILURE;
737
/* If there were any arguments from the configuration file, pass
738
them to parser as command line arguments */
610
/* If there was any arguments from configuration file,
611
pass them to parser as command arguments */
739
612
if(custom_argv != NULL){
740
ret = argp_parse(&argp, custom_argc, custom_argv,
741
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
error(0, errno, "argp_parse");
750
exitstatus = EX_OSERR;
753
exitstatus = EX_CONFIG;
613
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
615
if (ret == ARGP_ERR_UNKNOWN){
616
fprintf(stderr, "Unknown error while parsing arguments\n");
617
exitstatus = EXIT_FAILURE;
758
622
/* Parse actual command line arguments, to let them override the
760
ret = argp_parse(&argp, argc, argv,
761
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
769
error(0, errno, "argp_parse");
770
exitstatus = EX_OSERR;
773
exitstatus = EX_USAGE;
778
char *pluginhelperenv;
780
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
781
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
if(ret == -1 or not bret){
786
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
787
" environment variable to \"%s\" for all plugins\n",
788
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
791
free(pluginhelperenv);
624
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
625
if (ret == ARGP_ERR_UNKNOWN){
626
fprintf(stderr, "Unknown error while parsing arguments\n");
627
exitstatus = EXIT_FAILURE;
796
for(plugin *p = plugin_list; p != NULL; p = p->next){
632
for(plugin *p = plugin_list; p != NULL; p=p->next){
797
633
fprintf(stderr, "Plugin: %s has %d arguments\n",
798
634
p->name ? p->name : "Global", p->argc - 1);
799
635
for(char **a = p->argv; *a != NULL; a++){
800
636
fprintf(stderr, "\tArg: %s\n", *a);
802
fprintf(stderr, "...and %d environment variables\n", p->envc);
638
fprintf(stderr, "...and %u environment variables\n", p->envc);
803
639
for(char **a = p->environ; *a != NULL; a++){
804
640
fprintf(stderr, "\t%s\n", *a);
810
/* Work around Debian bug #633582:
811
<https://bugs.debian.org/633582> */
812
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
813
if(plugindir_fd == -1){
815
error(0, errno, "open(\"" PDIR "\")");
818
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
error(0, errno, "fstat");
822
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
823
ret = fchown(plugindir_fd, uid, gid);
825
error(0, errno, "fchown");
833
/* Lower permissions */
836
error(0, errno, "setgid");
645
/* Strip permissions down to nobody */
838
646
ret = setuid(uid);
840
error(0, errno, "setuid");
843
/* Open plugin directory with close_on_exec flag */
655
if (plugindir == NULL){
658
dir = opendir(plugindir);
662
perror("Could not open plugin dir");
663
exitstatus = EXIT_FAILURE;
667
/* Set the FD_CLOEXEC flag on the directory, if possible */
845
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
848
#else /* not O_CLOEXEC */
850
#endif /* not O_CLOEXEC */
853
error(0, errno, "Could not open plugin dir");
854
exitstatus = EX_UNAVAILABLE;
859
/* Set the FD_CLOEXEC flag on the directory */
860
ret = set_cloexec_flag(dir_fd);
862
error(0, errno, "set_cloexec_flag");
863
exitstatus = EX_OSERR;
866
#endif /* O_CLOEXEC */
869
int good_name(const struct dirent * const dirent){
870
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
871
"*.dpkg-old", "*.dpkg-bak",
872
"*.dpkg-divert", NULL };
874
#pragma GCC diagnostic push
875
#pragma GCC diagnostic ignored "-Wcast-qual"
877
for(const char **pat = (const char **)patterns;
878
*pat != NULL; pat++){
880
#pragma GCC diagnostic pop
882
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
885
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
886
" matching pattern %s\n", dirent->d_name, *pat);
669
int dir_fd = dirfd(dir);
671
ret = set_cloexec_flag(dir_fd);
673
perror("set_cloexec_flag");
674
exitstatus = EXIT_FAILURE;
894
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
896
if(numplugins == -1){
897
error(0, errno, "Could not scan plugin dir");
899
exitstatus = EX_OSERR;
903
680
FD_ZERO(&rfds_all);
905
682
/* Read and execute any executable in the plugin directory*/
906
for(int i = 0; i < numplugins; i++){
908
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
910
error(0, errno, "Could not open plugin");
914
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
916
error(0, errno, "stat");
684
dirst = readdir(dir);
686
/* All directory entries have been processed */
690
exitstatus = EXIT_FAILURE;
696
d_name_len = strlen(dirst->d_name);
698
/* Ignore dotfiles, backup files and other junk */
700
bool bad_name = false;
702
const char const *bad_prefixes[] = { ".", "#", NULL };
704
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
706
".dpkg-divert", NULL };
707
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
708
size_t pre_len = strlen(*pre);
709
if((d_name_len >= pre_len)
710
and strncmp((dirst->d_name), *pre, pre_len) == 0){
712
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
713
" with bad prefix %s\n", dirst->d_name, *pre);
722
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
723
size_t suf_len = strlen(*suf);
724
if((d_name_len >= suf_len)
725
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
728
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
729
" with bad suffix %s\n", dirst->d_name, *suf);
742
if(plugindir == NULL){
743
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
745
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
752
ret = stat(filename, &st);
922
759
/* Ignore non-executable files */
923
if(not S_ISREG(st.st_mode)
924
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
760
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
927
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
928
" with bad type or mode\n",
929
plugindir != NULL ? plugindir : PDIR,
930
direntries[i]->d_name);
762
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
763
" with bad type or mode\n", filename);
937
plugin *p = getplugin(direntries[i]->d_name);
769
plugin *p = getplugin(dirst->d_name);
939
error(0, errno, "getplugin");
946
777
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
947
direntries[i]->d_name);
957
787
for(char **a = g->argv + 1; *a != NULL; a++){
958
788
if(not add_argument(p, *a)){
959
error(0, errno, "add_argument");
789
perror("add_argument");
962
792
/* Add global environment variables */
963
793
for(char **e = g->environ; *e != NULL; e++){
964
794
if(not add_environment(p, *e, false)){
965
error(0, errno, "add_environment");
795
perror("add_environment");
970
/* If this plugin has any environment variables, we need to
971
duplicate the environment from this process, too. */
800
/* If this plugin has any environment variables, we will call
801
using execve and need to duplicate the environment from this
972
803
if(p->environ[0] != NULL){
973
804
for(char **e = environ; *e != NULL; e++){
974
805
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
806
perror("add_environment");
982
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
983
#else /* O_CLOEXEC */
984
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
985
#endif /* O_CLOEXEC */
987
error(0, errno, "pipe");
988
exitstatus = EX_OSERR;
992
if(pipefd[0] >= FD_SETSIZE){
993
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
997
exitstatus = EX_OSERR;
815
exitstatus = EXIT_FAILURE;
1002
818
/* Ask OS to automatic close the pipe on exec */
1003
819
ret = set_cloexec_flag(pipefd[0]);
1005
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
821
perror("set_cloexec_flag");
822
exitstatus = EXIT_FAILURE;
1012
825
ret = set_cloexec_flag(pipefd[1]);
1014
error(0, errno, "set_cloexec_flag");
1017
exitstatus = EX_OSERR;
1018
free(direntries[i]);
827
perror("set_cloexec_flag");
828
exitstatus = EXIT_FAILURE;
1021
#endif /* not O_CLOEXEC */
1022
831
/* Block SIGCHLD until process is safely in process list */
1023
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1024
&sigchld_action.sa_mask,
832
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1027
error(0, errno, "sigprocmask");
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
834
perror("sigprocmask");
835
exitstatus = EXIT_FAILURE;
1032
838
/* Starting a new process to be watched */
1036
} while(pid == -1 and errno == EINTR);
1038
error(0, errno, "fork");
1039
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1040
&sigchld_action.sa_mask, NULL));
1043
exitstatus = EX_OSERR;
1044
free(direntries[i]);
842
exitstatus = EXIT_FAILURE;
1048
846
/* this is the child process */
1049
847
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1051
error(0, errno, "sigaction");
1054
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
852
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1056
error(0, errno, "sigprocmask");
854
perror("sigprocmask");
1060
858
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1062
error(0, errno, "dup2");
1066
if(fexecve(plugin_fd, p->argv,
1067
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1068
error(0, errno, "fexecve for %s/%s",
1069
plugindir != NULL ? plugindir : PDIR,
1070
direntries[i]->d_name);
865
/* If dir has no file descriptor, we could not set FD_CLOEXEC
866
above and must now close it manually here. */
869
if(p->environ[0] == NULL){
870
if(execv(filename, p->argv) < 0){
875
if(execve(filename, p->argv, p->environ) < 0){
1075
882
/* Parent process */
1076
883
close(pipefd[1]); /* Close unused write end of pipe */
1078
plugin *new_plugin = getplugin(direntries[i]->d_name);
1079
if(new_plugin == NULL){
1080
error(0, errno, "getplugin");
1081
ret = (int)(TEMP_FAILURE_RETRY
1082
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
885
plugin *new_plugin = getplugin(dirst->d_name);
886
if (new_plugin == NULL){
888
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1085
error(0, errno, "sigprocmask");
890
perror("sigprocmask");
1087
exitstatus = EX_OSERR;
1088
free(direntries[i]);
892
exitstatus = EXIT_FAILURE;
1091
free(direntries[i]);
1093
896
new_plugin->pid = pid;
1094
897
new_plugin->fd = pipefd[0];
1096
899
/* Unblock SIGCHLD so signal handler can be run if this process
1097
900
has already completed */
1098
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1099
&sigchld_action.sa_mask,
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1102
error(0, errno, "sigprocmask");
1103
exitstatus = EX_OSERR;
903
perror("sigprocmask");
904
exitstatus = EXIT_FAILURE;
1107
908
FD_SET(new_plugin->fd, &rfds_all);
1109
if(maxfd < new_plugin->fd){
910
if (maxfd < new_plugin->fd){
1110
911
maxfd = new_plugin->fd;
1118
free_plugin(getplugin(NULL));
1120
919
for(plugin *p = plugin_list; p != NULL; p = p->next){
1121
920
if(p->pid != 0){
1127
926
free_plugin_list();
1131
930
/* Main loop while running plugins exist */
1132
931
while(plugin_list){
1133
932
fd_set rfds = rfds_all;
1134
933
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1135
if(select_ret == -1 and errno != EINTR){
1136
error(0, errno, "select");
1137
exitstatus = EX_OSERR;
934
if (select_ret == -1){
936
exitstatus = EXIT_FAILURE;
1140
939
/* OK, now either a process completed, or something can be read
1141
940
from one of them */
1142
941
for(plugin *proc = plugin_list; proc != NULL;){
1143
942
/* Is this process completely done? */
1144
if(proc->completed and proc->eof){
943
if(proc->eof and proc->completed){
1145
944
/* Only accept the plugin output if it exited cleanly */
1146
945
if(not WIFEXITED(proc->status)
1147
946
or WEXITSTATUS(proc->status) != 0){
1148
947
/* Bad exit by plugin */
1151
950
if(WIFEXITED(proc->status)){
1152
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1153
" status %d\n", proc->name,
1154
(intmax_t) (proc->pid),
951
fprintf(stderr, "Plugin %u exited with status %d\n",
952
(unsigned int) (proc->pid),
1155
953
WEXITSTATUS(proc->status));
1156
} else if(WIFSIGNALED(proc->status)){
1157
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1158
" signal %d: %s\n", proc->name,
1159
(intmax_t) (proc->pid),
1160
WTERMSIG(proc->status),
1161
strsignal(WTERMSIG(proc->status)));
954
} else if(WIFSIGNALED(proc->status)) {
955
fprintf(stderr, "Plugin %u killed by signal %d\n",
956
(unsigned int) (proc->pid),
957
WTERMSIG(proc->status));
958
} else if(WCOREDUMP(proc->status)){
959
fprintf(stderr, "Plugin %d dumped core\n",
960
(unsigned int) (proc->pid));
1165
964
/* Remove the plugin */
1166
965
FD_CLR(proc->fd, &rfds_all);
1168
967
/* Block signal while modifying process_list */
1169
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1171
&sigchld_action.sa_mask,
1174
error(0, errno, "sigprocmask");
1175
exitstatus = EX_OSERR;
968
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
970
perror("sigprocmask");
971
exitstatus = EXIT_FAILURE;
975
/* We are done modifying process list, so unblock signal */
976
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
perror("sigprocmask");
980
exitstatus = EXIT_FAILURE;
984
if(plugin_list == NULL){
1179
988
plugin *next_plugin = proc->next;
1180
989
free_plugin(proc);
1181
990
proc = next_plugin;
1183
/* We are done modifying process list, so unblock signal */
1184
ret = (int)(TEMP_FAILURE_RETRY
1185
(sigprocmask(SIG_UNBLOCK,
1186
&sigchld_action.sa_mask, NULL)));
1188
error(0, errno, "sigprocmask");
1189
exitstatus = EX_OSERR;
1193
if(plugin_list == NULL){
1200
994
/* This process exited nicely, so print its buffer */
1202
996
bool bret = print_out_password(proc->buffer,
1203
997
proc->buffer_length);
1205
error(0, errno, "print_out_password");
1206
exitstatus = EX_IOERR;
999
perror("print_out_password");
1000
exitstatus = EXIT_FAILURE;