21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
26
26
#include <stddef.h> /* size_t, NULL */
27
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
28
EXIT_SUCCESS, realloc() */
52
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
54
#include <string.h> /* strsep, strlen(), strcpy(),
55
56
#include <errno.h> /* errno */
56
57
#include <argp.h> /* struct argp_option, struct
57
58
argp_state, struct argp,
64
65
#include <errno.h> /* errno, EBADF */
66
67
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
#define CONFFILE "/conf/conf.d/mandos/client.conf"
69
const char *argp_program_version = "plugin-runner 1.0";
70
const char *argp_program_version = "mandos-client 1.0";
70
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
103
102
/* Create a new plugin */
104
103
plugin *new_plugin = malloc(sizeof(plugin));
105
104
if (new_plugin == NULL){
108
*new_plugin = (plugin) { .name = name,
112
.next = *plugin_list };
108
new_plugin->name = name;
114
109
new_plugin->argv = malloc(sizeof(char *) * 2);
115
110
if (new_plugin->argv == NULL){
119
114
new_plugin->argv[0] = name;
120
115
new_plugin->argv[1] = NULL;
122
new_plugin->environ = malloc(sizeof(char *));
123
if(new_plugin->environ == NULL){
124
free(new_plugin->argv);
128
new_plugin->environ[0] = NULL;
116
new_plugin->argc = 1;
117
new_plugin->disabled = false;
118
new_plugin->next = *plugin_list;
129
119
/* Append the new plugin to the list */
130
120
*plugin_list = new_plugin;
131
121
return new_plugin;
134
/* Helper function for add_argument and add_environment */
135
static bool add_to_char_array(const char *new, char ***array,
137
/* Resize the pointed-to array to hold one more pointer */
138
*array = realloc(*array, sizeof(char *)
139
* (size_t) ((*len) + 2));
144
/* Make a copy of the new string */
145
char *copy = strdup(new);
149
/* Insert the copy */
150
(*array)[*len] = copy;
152
/* Add a new terminating NULL pointer to the last element */
153
(*array)[*len] = NULL;
157
/* Add to a plugin's argument vector */
158
static bool add_argument(plugin *p, const char *arg){
162
return add_to_char_array(arg, &(p->argv), &(p->argc));
165
/* Add to a plugin's environment */
166
static bool add_environment(plugin *p, const char *def){
170
return add_to_char_array(def, &(p->environ), &(p->envc));
124
static void addargument(plugin *p, char *arg){
125
p->argv[p->argc] = arg;
126
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
127
if (p->argv == NULL){
132
p->argv[p->argc] = NULL;
175
136
* Based on the example in the GNU LibC manual chapter 13.13 "File
228
char **add_to_argv(char **argv, int *argc, char *arg){
189
char ** addcustomargument(char **argv, int *argc, char *arg){
229
191
if (argv == NULL){
231
193
argv = malloc(sizeof(char*) * 2);
249
211
int main(int argc, char *argv[]){
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
212
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
213
const char *conffile = CONFFILE;
253
215
size_t d_name_len;
284
246
{ .name = "global-options", .key = 'g',
285
247
.arg = "OPTION[,OPTION[,...]]",
286
248
.doc = "Options passed to all plugins" },
287
{ .name = "global-envs", .key = 'e',
289
.doc = "Environment variable passed to all plugins" },
290
249
{ .name = "options-for", .key = 'o',
291
250
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
292
251
.doc = "Options passed only to specified plugin" },
293
{ .name = "envs-for", .key = 'f',
294
.arg = "PLUGIN:ENV=value",
295
.doc = "Environment variable passed to specified plugin" },
296
252
{ .name = "disable", .key = 'd',
298
254
.doc = "Disable a specific plugin", .group = 1 },
322
278
if(p[0] == '\0'){
325
if(not add_argument(getplugin(NULL, plugins), p)){
326
perror("add_argument");
327
return ARGP_ERR_UNKNOWN;
337
char *envdef = strdup(arg);
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
342
perror("add_environment");
281
addargument(getplugin(NULL, plugins), p);
347
286
if (arg != NULL){
348
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
287
char *name = strsep(&arg, ":");
352
291
char *opt = strsep(&arg, ":");
359
298
if(p[0] == '\0'){
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
301
addargument(getplugin(name, plugins), p);
375
char *envdef = strchr(arg, ':');
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
385
perror("add_environment");
390
307
if (arg != NULL){
391
plugin *p = getplugin(arg, plugins);
393
return ARGP_ERR_UNKNOWN;
308
getplugin(arg, plugins)->disabled = true;
455
368
new_arg = strdup(p);
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
369
custom_argv = addcustomargument(custom_argv, &custom_argc, new_arg);
457
370
if (custom_argv == NULL){
458
perror("add_to_argv");
371
perror("addcustomargument");
459
372
exitstatus = EXIT_FAILURE;
466
/* Check for harmful errors and go to fallback. Other errors might
467
not affect opening plugins */
379
/* check for harmfull errors */
468
380
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
470
382
exitstatus = EXIT_FAILURE;
489
401
for(char **a = p->argv; *a != NULL; a++){
490
402
fprintf(stderr, "\tArg: %s\n", *a);
492
fprintf(stderr, "...and %u environment variables\n", p->envc);
493
for(char **a = p->environ; *a != NULL; a++){
494
fprintf(stderr, "\t%s\n", *a);
592
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
499
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
500
if (filename == NULL){
504
strcpy(filename, plugindir); /* Spurious warning */
505
strcat(filename, "/"); /* Spurious warning */
506
strcat(filename, dirst->d_name); /* Spurious warning */
598
508
ret = stat(filename, &st);
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
523
if(getplugin(dirst->d_name, &plugin_list)->disabled){
621
525
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
531
plugin *p = getplugin(dirst->d_name, &plugin_list);
628
533
/* Add global arguments to argument list for this plugin */
629
534
plugin *g = getplugin(NULL, &plugin_list);
631
for(char **a = g->argv + 1; *a != NULL; a++){
632
if(not add_argument(p, *a)){
633
perror("add_argument");
636
/* Add global environment variables */
637
for(char **e = g->environ; *e != NULL; e++){
638
if(not add_environment(p, *e)){
639
perror("add_environment");
644
/* If this plugin has any environment variables, we will call
645
using execve and need to duplicate the environment from this
647
if(p->environ[0] != NULL){
648
for(char **e = environ; *e != NULL; e++){
649
char *copy = strdup(*e);
654
if(not add_environment(p, copy)){
655
perror("add_environment");
535
for(char **a = g->argv + 1; *a != NULL; a++){
661
540
ret = pipe(pipefd);
714
593
above and must now close it manually here. */
717
if(p->environ[0] == NULL){
718
if(execv(filename, p->argv) < 0){
723
if(execve(filename, p->argv, p->environ) < 0){
596
if(execv(filename, p->argv) < 0){
915
782
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
783
next = plugin_list->next;
917
784
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
923
free(plugin_list->environ);
924
785
free(plugin_list);