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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 © 2008-2018 Teddy Hogeborn
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* Copyright © 2008-2018 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 © 2008,2009 Teddy Hogeborn
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* Copyright © 2008,2009 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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* WITHOUT ANY WARRANTY; without even the implied warranty of
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15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16
* 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, fileno(), fprintf(),
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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){
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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)){
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perror("add_argument");
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return ARGP_ERR_UNKNOWN;
453
392
case 'G': /* --global-env */
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if(add_environment(getplugin(NULL), arg, true)){
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if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
458
400
case 'o': /* --options-for */
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char *option_list = strchr(arg, ':');
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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){
475
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;
482
422
case 'E': /* --env-for */
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427
char *envdef = strchr(arg, ':');
485
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if(envdef == 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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if(add_environment(getplugin(arg), envdef, true)){
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
502
437
case 'd': /* --disable */
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plugin *p = getplugin(arg);
441
return ARGP_ERR_UNKNOWN;
511
446
case 'e': /* --enable */
513
448
plugin *p = getplugin(arg);
450
return ARGP_ERR_UNKNOWN;
520
455
case 128: /* --plugin-dir */
522
457
plugindir = strdup(arg);
523
if(plugindir != NULL){
458
if(plugindir == NULL){
527
462
case 129: /* --config-file */
528
463
/* This is already done by parse_opt_config_file() */
530
465
case 130: /* --userid */
531
tmp_id = strtoimax(arg, &tmp, 10);
532
if(errno != 0 or tmp == arg or *tmp != '\0'
533
or tmp_id != (uid_t)tmp_id){
534
argp_error(state, "Bad user ID number: \"%s\", using %"
535
PRIdMAX, arg, (intmax_t)uid);
466
uid = (uid_t)strtol(arg, NULL, 10);
541
468
case 131: /* --groupid */
542
tmp_id = strtoimax(arg, &tmp, 10);
543
if(errno != 0 or tmp == arg or *tmp != '\0'
544
or tmp_id != (gid_t)tmp_id){
545
argp_error(state, "Bad group ID number: \"%s\", using %"
546
PRIdMAX, arg, (intmax_t)gid);
469
gid = (gid_t)strtol(arg, NULL, 10);
552
471
case 132: /* --debug */
555
case 133: /* --plugin-helper-dir */
556
free(pluginhelperdir);
557
pluginhelperdir = strdup(arg);
558
if(pluginhelperdir != NULL){
563
* These reproduce what we would get without ARGP_NO_HELP
565
case '?': /* --help */
566
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
567
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
568
__builtin_unreachable();
569
case -3: /* --usage */
570
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
571
argp_state_help(state, state->out_stream,
572
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
573
__builtin_unreachable();
574
case 'V': /* --version */
575
fprintf(state->out_stream, "%s\n", argp_program_version);
579
* When adding more options before this line, remember to also add a
580
* "case" to the "parse_opt_config_file" function below.
582
474
case ARGP_KEY_ARG:
583
475
/* Cryptsetup always passes an argument, which is an empty
584
476
string if "none" was specified in /etc/crypttab. So if
585
477
argument was empty, we ignore it silently. */
479
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
590
__attribute__((fallthrough));
595
485
return ARGP_ERR_UNKNOWN;
597
return errno; /* Set to 0 at start */
600
490
/* This option parser is the same as parse_opt() above, except it
601
491
ignores everything but the --config-file option. */
602
error_t parse_opt_config_file(int key, char *arg,
603
__attribute__((unused))
604
struct argp_state *state){
492
error_t parse_opt_config_file (int key, char *arg,
493
__attribute__((unused))
494
struct argp_state *state) {
607
496
case 'g': /* --global-options */
608
497
case 'G': /* --global-env */
609
498
case 'o': /* --options-for */
701
577
new_arg = strdup(p);
702
578
if(new_arg == NULL){
703
error(0, errno, "strdup");
704
exitstatus = EX_OSERR;
580
exitstatus = EXIT_FAILURE;
709
585
custom_argc += 1;
711
char **new_argv = realloc(custom_argv, sizeof(char *)
712
* ((size_t)custom_argc + 1));
713
if(new_argv == NULL){
714
error(0, errno, "realloc");
715
exitstatus = EX_OSERR;
720
custom_argv = new_argv;
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
590
exitstatus = EXIT_FAILURE;
723
594
custom_argv[custom_argc-1] = new_arg;
724
custom_argv[custom_argc] = NULL;
595
custom_argv[custom_argc] = NULL;
728
ret = fclose(conffp);
729
} while(ret == EOF and errno == EINTR);
731
error(0, errno, "fclose");
732
exitstatus = EX_IOERR;
737
600
/* Check for harmful errors and go to fallback. Other errors might
738
601
not affect opening plugins */
739
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
740
error(0, errno, "fopen");
741
exitstatus = EX_OSERR;
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
exitstatus = EXIT_FAILURE;
745
/* If there were any arguments from the configuration file, pass
746
them to parser as command line arguments */
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
747
610
if(custom_argv != NULL){
748
ret = argp_parse(&argp, custom_argc, custom_argv,
749
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
757
error(0, errno, "argp_parse");
758
exitstatus = EX_OSERR;
761
exitstatus = EX_CONFIG;
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
613
if (ret == ARGP_ERR_UNKNOWN){
614
fprintf(stderr, "Unknown error while parsing arguments\n");
615
exitstatus = EXIT_FAILURE;
766
620
/* Parse actual command line arguments, to let them override the
768
ret = argp_parse(&argp, argc, argv,
769
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
777
error(0, errno, "argp_parse");
778
exitstatus = EX_OSERR;
781
exitstatus = EX_USAGE;
786
char *pluginhelperenv;
788
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
791
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
793
if(ret == -1 or not bret){
794
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
795
" environment variable to \"%s\" for all plugins\n",
796
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
799
free(pluginhelperenv);
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
804
for(plugin *p = plugin_list; p != NULL; p = p->next){
630
for(plugin *p = plugin_list; p != NULL; p=p->next){
805
631
fprintf(stderr, "Plugin: %s has %d arguments\n",
806
632
p->name ? p->name : "Global", p->argc - 1);
807
633
for(char **a = p->argv; *a != NULL; a++){
808
634
fprintf(stderr, "\tArg: %s\n", *a);
810
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
811
637
for(char **a = p->environ; *a != NULL; a++){
812
638
fprintf(stderr, "\t%s\n", *a);
818
/* Work around Debian bug #633582:
819
<https://bugs.debian.org/633582> */
820
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
821
if(plugindir_fd == -1){
823
error(0, errno, "open(\"" PDIR "\")");
826
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
828
error(0, errno, "fstat");
830
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
831
ret = fchown(plugindir_fd, uid, gid);
833
error(0, errno, "fchown");
841
/* Lower permissions */
844
error(0, errno, "setgid");
643
/* Strip permissions down to nobody */
846
644
ret = setuid(uid);
848
error(0, errno, "setuid");
851
/* Open plugin directory with close_on_exec flag */
653
if (plugindir == NULL){
656
dir = opendir(plugindir);
660
perror("Could not open plugin dir");
661
exitstatus = EXIT_FAILURE;
665
/* Set the FD_CLOEXEC flag on the directory, if possible */
853
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
856
#else /* not O_CLOEXEC */
858
#endif /* not O_CLOEXEC */
861
error(0, errno, "Could not open plugin dir");
862
exitstatus = EX_UNAVAILABLE;
867
/* Set the FD_CLOEXEC flag on the directory */
868
ret = set_cloexec_flag(dir_fd);
870
error(0, errno, "set_cloexec_flag");
871
exitstatus = EX_OSERR;
874
#endif /* O_CLOEXEC */
877
int good_name(const struct dirent * const dirent){
878
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
879
"*.dpkg-old", "*.dpkg-bak",
880
"*.dpkg-divert", NULL };
882
#pragma GCC diagnostic push
883
#pragma GCC diagnostic ignored "-Wcast-qual"
885
for(const char **pat = (const char **)patterns;
886
*pat != NULL; pat++){
888
#pragma GCC diagnostic pop
890
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
893
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
894
" matching pattern %s\n", dirent->d_name, *pat);
667
int dir_fd = dirfd(dir);
669
ret = set_cloexec_flag(dir_fd);
671
perror("set_cloexec_flag");
672
exitstatus = EXIT_FAILURE;
902
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
904
if(numplugins == -1){
905
error(0, errno, "Could not scan plugin dir");
907
exitstatus = EX_OSERR;
911
678
FD_ZERO(&rfds_all);
913
680
/* Read and execute any executable in the plugin directory*/
914
for(int i = 0; i < numplugins; i++){
916
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
918
error(0, errno, "Could not open plugin");
922
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
924
error(0, errno, "stat");
682
dirst = readdir(dir);
684
/* All directory entries have been processed */
688
exitstatus = EXIT_FAILURE;
694
d_name_len = strlen(dirst->d_name);
696
/* Ignore dotfiles, backup files and other junk */
698
bool bad_name = false;
700
const char const *bad_prefixes[] = { ".", "#", NULL };
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
705
".dpkg-divert", NULL };
706
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
707
size_t pre_len = strlen(*pre);
708
if((d_name_len >= pre_len)
709
and strncmp((dirst->d_name), *pre, pre_len) == 0){
711
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
712
" with bad prefix %s\n", dirst->d_name, *pre);
721
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
722
size_t suf_len = strlen(*suf);
723
if((d_name_len >= suf_len)
724
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
727
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
728
" with bad suffix %s\n", dirst->d_name, *suf);
741
if(plugindir == NULL){
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
744
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
751
ret = stat(filename, &st);
930
758
/* Ignore non-executable files */
931
if(not S_ISREG(st.st_mode)
932
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
935
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
936
" with bad type or mode\n",
937
plugindir != NULL ? plugindir : PDIR,
938
direntries[i]->d_name);
761
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
" with bad type or mode\n", filename);
945
plugin *p = getplugin(direntries[i]->d_name);
768
plugin *p = getplugin(dirst->d_name);
947
error(0, errno, "getplugin");
954
776
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
955
direntries[i]->d_name);
965
786
for(char **a = g->argv + 1; *a != NULL; a++){
966
787
if(not add_argument(p, *a)){
967
error(0, errno, "add_argument");
788
perror("add_argument");
970
791
/* Add global environment variables */
971
792
for(char **e = g->environ; *e != NULL; e++){
972
793
if(not add_environment(p, *e, false)){
973
error(0, errno, "add_environment");
794
perror("add_environment");
978
/* If this plugin has any environment variables, we need to
979
duplicate the environment from this process, too. */
799
/* If this plugin has any environment variables, we will call
800
using execve and need to duplicate the environment from this
980
802
if(p->environ[0] != NULL){
981
803
for(char **e = environ; *e != NULL; e++){
982
804
if(not add_environment(p, *e, false)){
983
error(0, errno, "add_environment");
805
perror("add_environment");
990
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
991
#else /* O_CLOEXEC */
992
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
993
#endif /* O_CLOEXEC */
995
error(0, errno, "pipe");
996
exitstatus = EX_OSERR;
1000
if(pipefd[0] >= FD_SETSIZE){
1001
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1005
exitstatus = EX_OSERR;
1006
free(direntries[i]);
814
exitstatus = EXIT_FAILURE;
1010
817
/* Ask OS to automatic close the pipe on exec */
1011
818
ret = set_cloexec_flag(pipefd[0]);
1013
error(0, errno, "set_cloexec_flag");
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
820
perror("set_cloexec_flag");
821
exitstatus = EXIT_FAILURE;
1020
824
ret = set_cloexec_flag(pipefd[1]);
1022
error(0, errno, "set_cloexec_flag");
1025
exitstatus = EX_OSERR;
1026
free(direntries[i]);
826
perror("set_cloexec_flag");
827
exitstatus = EXIT_FAILURE;
1029
#endif /* not O_CLOEXEC */
1030
830
/* Block SIGCHLD until process is safely in process list */
1031
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1032
&sigchld_action.sa_mask,
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1035
error(0, errno, "sigprocmask");
1036
exitstatus = EX_OSERR;
1037
free(direntries[i]);
833
perror("sigprocmask");
834
exitstatus = EXIT_FAILURE;
1040
837
/* Starting a new process to be watched */
1044
} while(pid == -1 and errno == EINTR);
1046
error(0, errno, "fork");
1047
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1048
&sigchld_action.sa_mask, NULL));
1051
exitstatus = EX_OSERR;
1052
free(direntries[i]);
841
exitstatus = EXIT_FAILURE;
1056
845
/* this is the child process */
1057
846
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1059
error(0, errno, "sigaction");
1062
851
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1064
error(0, errno, "sigprocmask");
853
perror("sigprocmask");
1068
857
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1070
error(0, errno, "dup2");
1074
if(fexecve(plugin_fd, p->argv,
1075
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1076
error(0, errno, "fexecve for %s/%s",
1077
plugindir != NULL ? plugindir : PDIR,
1078
direntries[i]->d_name);
864
/* If dir has no file descriptor, we could not set FD_CLOEXEC
865
above and must now close it manually here. */
868
if(p->environ[0] == NULL){
869
if(execv(filename, p->argv) < 0){
874
if(execve(filename, p->argv, p->environ) < 0){
1083
881
/* Parent process */
1084
882
close(pipefd[1]); /* Close unused write end of pipe */
1086
plugin *new_plugin = getplugin(direntries[i]->d_name);
1087
if(new_plugin == NULL){
1088
error(0, errno, "getplugin");
1089
ret = (int)(TEMP_FAILURE_RETRY
1090
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
884
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1093
error(0, errno, "sigprocmask");
889
perror("sigprocmask");
1095
exitstatus = EX_OSERR;
1096
free(direntries[i]);
891
exitstatus = EXIT_FAILURE;
1099
free(direntries[i]);
1101
895
new_plugin->pid = pid;
1102
896
new_plugin->fd = pipefd[0];
1105
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1106
new_plugin->name, (intmax_t) (new_plugin->pid));
1109
898
/* Unblock SIGCHLD so signal handler can be run if this process
1110
899
has already completed */
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1112
&sigchld_action.sa_mask,
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1115
error(0, errno, "sigprocmask");
1116
exitstatus = EX_OSERR;
902
perror("sigprocmask");
903
exitstatus = EXIT_FAILURE;
1120
907
FD_SET(new_plugin->fd, &rfds_all);
1122
if(maxfd < new_plugin->fd){
909
if (maxfd < new_plugin->fd){
1123
910
maxfd = new_plugin->fd;
1131
free_plugin(getplugin(NULL));
1133
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
1134
918
if(p->pid != 0){
1145
929
while(plugin_list){
1146
930
fd_set rfds = rfds_all;
1147
931
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1148
if(select_ret == -1 and errno != EINTR){
1149
error(0, errno, "select");
1150
exitstatus = EX_OSERR;
932
if (select_ret == -1){
934
exitstatus = EXIT_FAILURE;
1153
937
/* OK, now either a process completed, or something can be read
1154
938
from one of them */
1155
939
for(plugin *proc = plugin_list; proc != NULL;){
1156
940
/* Is this process completely done? */
1157
if(proc->completed and proc->eof){
941
if(proc->eof and proc->completed){
1158
942
/* Only accept the plugin output if it exited cleanly */
1159
943
if(not WIFEXITED(proc->status)
1160
944
or WEXITSTATUS(proc->status) != 0){
1161
945
/* Bad exit by plugin */
1164
948
if(WIFEXITED(proc->status)){
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1166
" status %d\n", proc->name,
1167
(intmax_t) (proc->pid),
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
1168
951
WEXITSTATUS(proc->status));
1169
} else if(WIFSIGNALED(proc->status)){
1170
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1171
" signal %d: %s\n", proc->name,
1172
(intmax_t) (proc->pid),
1173
WTERMSIG(proc->status),
1174
strsignal(WTERMSIG(proc->status)));
952
} else if(WIFSIGNALED(proc->status)) {
953
fprintf(stderr, "Plugin %u killed by signal %d\n",
954
(unsigned int) (proc->pid),
955
WTERMSIG(proc->status));
956
} else if(WCOREDUMP(proc->status)){
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
1178
962
/* Remove the plugin */
1179
963
FD_CLR(proc->fd, &rfds_all);
1181
965
/* Block signal while modifying process_list */
1182
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1184
&sigchld_action.sa_mask,
966
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
968
perror("sigprocmask");
969
exitstatus = EXIT_FAILURE;