3
3
* Mandos plugin runner - Run Mandos plugins
5
* Copyright © 2008-2018 Teddy Hogeborn
6
* Copyright © 2008-2018 Björn Påhlsson
8
* This file is part of Mandos.
10
* Mandos is free software: you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by
12
* the Free Software Foundation, either version 3 of the License, or
13
* (at your option) any later version.
15
* Mandos is distributed in the hope that it will be useful, but
5
* Copyright © 2008-2015 Teddy Hogeborn
6
* Copyright © 2008-2015 Björn Påhlsson
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
10
* published by the Free Software Foundation, either version 3 of the
11
* License, or (at your option) any later version.
13
* This program is distributed in the hope that it will be useful, but
16
14
* WITHOUT ANY WARRANTY; without even the implied warranty of
17
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18
16
* General Public License for more details.
20
18
* You should have received a copy of the GNU General Public License
21
* along with Mandos. If not, see <http://www.gnu.org/licenses/>.
19
* along with this program. If not, see
20
* <http://www.gnu.org/licenses/>.
23
22
* Contact the authors at <mandos@recompile.se>.
26
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
26
O_CLOEXEC, pipe2() */
28
27
#include <stddef.h> /* size_t, NULL */
29
#include <stdlib.h> /* malloc(), reallocarray(), realloc(),
30
EXIT_SUCCESS, exit() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
31
30
#include <stdbool.h> /* bool, true, false */
32
31
#include <stdio.h> /* fileno(), fprintf(),
33
32
stderr, STDOUT_FILENO, fclose() */
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG() */
40
WEXITSTATUS(), WTERMSIG(),
42
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
43
43
#include <iso646.h> /* and, or, not */
44
44
#include <dirent.h> /* struct dirent, scandirat() */
179
179
/* Resize the pointed-to array to hold one more pointer */
180
180
char **new_array = NULL;
182
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
183
new_array = reallocarray(*array, (size_t)((*len) + 2),
186
if(((size_t)((*len) + 2)) > (SIZE_MAX / sizeof(char *))){
191
new_array = realloc(*array, (size_t)((*len) + 2)
182
new_array = realloc(*array, sizeof(char *)
183
* (size_t) ((*len) + 2));
195
184
} while(new_array == NULL and errno == EINTR);
196
185
/* Malloc check */
197
186
if(new_array == NULL){
324
313
__attribute__((nonnull))
325
314
static void free_plugin(plugin *plugin_node){
327
for(char **arg = (plugin_node->argv)+1; *arg != NULL; arg++){
316
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
330
free(plugin_node->name);
331
319
free(plugin_node->argv);
332
320
for(char **env = plugin_node->environ; *env != NULL; env++){
576
564
case '?': /* --help */
577
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
578
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
579
__builtin_unreachable();
580
567
case -3: /* --usage */
581
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
582
569
argp_state_help(state, state->out_stream,
583
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
584
__builtin_unreachable();
585
571
case 'V': /* --version */
586
572
fprintf(state->out_stream, "%s\n", argp_program_version);
587
573
exit(EXIT_SUCCESS);
720
701
custom_argc += 1;
722
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
723
char **new_argv = reallocarray(custom_argv, (size_t)custom_argc + 1,
726
char **new_argv = NULL;
727
if(((size_t)custom_argc + 1) > (SIZE_MAX / sizeof(char *))){
731
new_argv = realloc(custom_argv, ((size_t)custom_argc + 1)
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((size_t)custom_argc + 1));
735
705
if(new_argv == NULL){
736
error(0, errno, "reallocarray");
706
error(0, errno, "realloc");
737
707
exitstatus = EX_OSERR;
826
for(plugin *p = plugin_list; p != NULL; p = p->next){
796
for(plugin *p = plugin_list; p != NULL; p=p->next){
827
797
fprintf(stderr, "Plugin: %s has %d arguments\n",
828
798
p->name ? p->name : "Global", p->argc - 1);
829
799
for(char **a = p->argv; *a != NULL; a++){
839
809
if(getuid() == 0){
840
810
/* Work around Debian bug #633582:
841
<https://bugs.debian.org/633582> */
811
<http://bugs.debian.org/633582> */
842
812
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
843
813
if(plugindir_fd == -1){
844
814
if(errno != ENOENT){
895
#if __GLIBC_PREREQ(2, 15)
924
896
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
#else /* not __GLIBC_PREREQ(2, 15) */
899
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
900
&direntries, good_name, alphasort);
901
#endif /* not __GLIBC_PREREQ(2, 15) */
902
#else /* not __GLIBC__ */
903
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
904
&direntries, good_name, alphasort);
905
#endif /* not __GLIBC__ */
926
906
if(numplugins == -1){
927
907
error(0, errno, "Could not scan plugin dir");
928
908
direntries = NULL;
1123
1103
new_plugin->pid = pid;
1124
1104
new_plugin->fd = pipefd[0];
1127
fprintf(stderr, "Plugin %s started (PID %" PRIdMAX ")\n",
1128
new_plugin->name, (intmax_t) (new_plugin->pid));
1131
1106
/* Unblock SIGCHLD so signal handler can be run if this process
1132
1107
has already completed */
1133
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1142
FD_SET(new_plugin->fd, &rfds_all);
1117
#if defined (__GNUC__) and defined (__GLIBC__)
1118
#if not __GLIBC_PREREQ(2, 16)
1119
#pragma GCC diagnostic push
1120
#pragma GCC diagnostic ignored "-Wsign-conversion"
1123
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1124
-Wconversion in GNU libc
1126
#if defined (__GNUC__) and defined (__GLIBC__)
1127
#if not __GLIBC_PREREQ(2, 16)
1128
#pragma GCC diagnostic pop
1144
1132
if(maxfd < new_plugin->fd){
1145
1133
maxfd = new_plugin->fd;
1194
1182
(intmax_t) (proc->pid),
1195
1183
WTERMSIG(proc->status),
1196
1184
strsignal(WTERMSIG(proc->status)));
1185
} else if(WCOREDUMP(proc->status)){
1186
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1187
" core\n", proc->name, (intmax_t) (proc->pid));
1200
1191
/* Remove the plugin */
1201
FD_CLR(proc->fd, &rfds_all);
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic push
1195
#pragma GCC diagnostic ignored "-Wsign-conversion"
1198
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1199
-Wconversion in GNU libc
1201
#if defined (__GNUC__) and defined (__GLIBC__)
1202
#if not __GLIBC_PREREQ(2, 16)
1203
#pragma GCC diagnostic pop
1203
1207
/* Block signal while modifying process_list */
1204
1208
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1246
1250
/* This process has not completed. Does it have any output? */
1247
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1251
#if defined (__GNUC__) and defined (__GLIBC__)
1252
#if not __GLIBC_PREREQ(2, 16)
1253
#pragma GCC diagnostic push
1254
#pragma GCC diagnostic ignored "-Wsign-conversion"
1257
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1263
#if defined (__GNUC__) and defined (__GLIBC__)
1264
#if not __GLIBC_PREREQ(2, 16)
1265
#pragma GCC diagnostic pop
1248
1268
/* This process had nothing to say at this time */
1249
1269
proc = proc->next;
added
removed
plugin-runner.c
