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> /* strtok, 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"
69
const char *argp_program_version = "plugin-runner 1.0";
69
const char *argp_program_version = "mandos-client 1.0";
70
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
103
101
/* Create a new plugin */
104
102
plugin *new_plugin = malloc(sizeof(plugin));
105
103
if (new_plugin == NULL){
108
*new_plugin = (plugin) { .name = name,
112
.next = *plugin_list };
107
new_plugin->name = name;
114
108
new_plugin->argv = malloc(sizeof(char *) * 2);
115
109
if (new_plugin->argv == NULL){
119
113
new_plugin->argv[0] = name;
120
114
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;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
129
118
/* Append the new plugin to the list */
130
119
*plugin_list = new_plugin;
131
120
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));
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
131
p->argv[p->argc] = NULL;
175
135
* Based on the example in the GNU LibC manual chapter 13.13 "File
228
char **add_to_argv(char **argv, int *argc, char *arg){
231
argv = malloc(sizeof(char*) * 2);
235
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
239
argv = realloc(argv, sizeof(char *)
240
* ((unsigned int) *argc + 1));
249
188
int main(int argc, char *argv[]){
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
189
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
253
190
size_t d_name_len;
255
192
struct dirent *dirst;
263
200
struct sigaction old_sigchld_action;
264
201
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
265
202
.sa_flags = SA_NOCLDSTOP };
266
char **custom_argv = NULL;
203
char *plus_options = NULL;
204
char **plus_argv = NULL;
269
208
/* Establish a signal handler */
270
209
sigemptyset(&sigchld_action.sa_mask);
284
223
{ .name = "global-options", .key = 'g',
285
224
.arg = "OPTION[,OPTION[,...]]",
286
225
.doc = "Options passed to all plugins" },
287
{ .name = "global-envs", .key = 'e',
289
.doc = "Environment variable passed to all plugins" },
290
226
{ .name = "options-for", .key = 'o',
291
227
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
292
228
.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
229
{ .name = "disable", .key = 'd',
298
231
.doc = "Disable a specific plugin", .group = 1 },
319
252
if (arg != NULL){
321
while((p = strsep(&arg, ",")) != NULL){
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");
253
char *p = strtok(arg, ",");
255
addargument(getplugin(NULL, plugins), p);
256
p = strtok(NULL, ",");
347
261
if (arg != NULL){
348
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
352
char *opt = strsep(&arg, ":");
358
while((p = strsep(&opt, ",")) != NULL){
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
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");
262
char *name = strtok(arg, ":");
263
char *p = strtok(NULL, ":");
267
addargument(getplugin(name, plugins), p);
268
p = strtok(NULL, ",");
390
274
if (arg != NULL){
391
plugin *p = getplugin(arg, plugins);
393
return ARGP_ERR_UNKNOWN;
275
getplugin(arg, plugins)->disabled = true;
430
313
exitstatus = EXIT_FAILURE;
434
conffp = fopen(argfile, "r");
436
char *org_line = NULL;
439
char *p, *arg, *new_arg, *line;
440
const char whitespace_delims[] = " \r\t\f\v\n";
441
const char comment_delim[] = "#";
444
sret = getline(&org_line, &size, conffp);
450
arg = strsep(&line, comment_delim);
451
while((p = strsep(&arg, whitespace_delims)) != NULL){
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
457
if (custom_argv == NULL){
458
perror("add_to_argv");
459
exitstatus = EXIT_FAILURE;
466
/* Check for harmful errors and go to fallback. Other errors might
467
not affect opening plugins */
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
318
/* This is a mangled argument in the form of
319
"+--option+--other-option=parameter+--yet-another-option", etc */
320
/* Make new argc and argv vars, and call argp_parse() again. */
321
plus_options++; /* skip the first '+' character */
322
const char delims[] = "+";
325
plus_argv = malloc(sizeof(char*) * 2);
326
if(plus_argv == NULL){
470
328
exitstatus = EXIT_FAILURE;
475
if(custom_argv != NULL){
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
331
plus_argv[0] = argv[0];
333
arg = strtok(plus_options, delims); /* Get first argument */
336
plus_argv = realloc(plus_argv, sizeof(char *)
337
* ((unsigned int) new_argc + 1));
338
if(plus_argv == NULL){
340
exitstatus = EXIT_FAILURE;
343
plus_argv[new_argc-1] = arg;
344
plus_argv[new_argc] = NULL;
345
arg = strtok(NULL, delims); /* Get next argument */
347
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
478
348
if (ret == ARGP_ERR_UNKNOWN){
479
349
fprintf(stderr, "Unknown error while parsing arguments\n");
480
350
exitstatus = EXIT_FAILURE;
489
359
for(char **a = p->argv; *a != NULL; a++){
490
360
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);
457
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
458
if (filename == NULL){
462
strcpy(filename, plugindir); /* Spurious warning */
463
strcat(filename, "/"); /* Spurious warning */
464
strcat(filename, dirst->d_name); /* Spurious warning */
598
466
ret = stat(filename, &st);
489
plugin *p = getplugin(dirst->d_name, &plugin_list);
628
491
/* Add global arguments to argument list for this plugin */
629
492
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");
493
for(char **a = g->argv + 1; *a != NULL; a++){
661
498
ret = pipe(pipefd);
714
551
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){
554
if(execv(filename, p->argv) < 0){
909
734
/* Restore old signal handler */
910
735
sigaction(SIGCHLD, &old_sigchld_action, NULL);
914
739
/* Free the plugin list */
915
740
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
741
next = plugin_list->next;
917
742
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
743
free(plugin_list);