56
56
#include <argp.h> /* struct argp_option, struct
57
57
argp_state, struct argp,
58
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
61
#include <signal.h> /* struct sigaction, sigemptyset(),
61
62
sigaddset(), sigaction(),
62
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
65
#include <errno.h> /* errno, EBADF */
66
67
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
72
const char *argp_program_version = "plugin-runner 1.0";
70
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
200
203
process *process_list = NULL;
202
/* Mark a process as completed when it exits, and save its exit
205
/* Mark processes as completed when they exit, and save their exit
204
207
void handle_sigchld(__attribute__((unused)) int sig){
205
process *proc = process_list;
207
pid_t pid = wait(&status);
212
while(proc != NULL and proc->pid != pid){
216
/* Process not found in process list */
219
proc->status = status;
220
proc->completed = true;
209
process *proc = process_list;
211
pid_t pid = waitpid(-1, &status, WNOHANG);
213
/* Only still running child processes */
217
if (errno != ECHILD){
220
/* No child processes */
224
/* A child exited, find it in process_list */
225
while(proc != NULL and proc->pid != pid){
229
/* Process not found in process list */
232
proc->status = status;
233
proc->completed = true;
223
237
bool print_out_password(const char *buffer, size_t length){
238
char **add_to_argv(char **argv, int *argc, char *arg){
241
argv = malloc(sizeof(char*) * 2);
245
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
249
argv = realloc(argv, sizeof(char *)
250
* ((unsigned int) *argc + 1));
259
252
static void free_plugin_list(plugin *plugin_list){
260
253
for(plugin *next; plugin_list != NULL; plugin_list = next){
261
254
next = plugin_list->next;
326
319
{ .name = "plugin-dir", .key = 128,
327
320
.arg = "DIRECTORY",
328
321
.doc = "Specify a different plugin directory", .group = 2 },
329
{ .name = "userid", .key = 129,
330
.arg = "ID", .flags = 0,
331
.doc = "User ID the plugins will run as", .group = 2 },
332
{ .name = "groupid", .key = 130,
333
.arg = "ID", .flags = 0,
334
.doc = "Group ID the plugins will run as", .group = 2 },
335
{ .name = "debug", .key = 131,
336
.doc = "Debug mode", .group = 3 },
322
{ .name = "config-file", .key = 129,
324
.doc = "Specify a different configuration file", .group = 2 },
325
{ .name = "userid", .key = 130,
326
.arg = "ID", .flags = 0,
327
.doc = "User ID the plugins will run as", .group = 3 },
328
{ .name = "groupid", .key = 131,
329
.arg = "ID", .flags = 0,
330
.doc = "Group ID the plugins will run as", .group = 3 },
331
{ .name = "debug", .key = 132,
332
.doc = "Debug mode", .group = 4 },
461
conffp = fopen(argfile, "r");
466
if (argfile == NULL){
467
conffp = fopen(AFILE, "r");
469
conffp = fopen(argfile, "r");
462
472
if(conffp != NULL){
463
473
char *org_line = NULL;
464
474
char *p, *arg, *new_arg, *line;
467
477
const char whitespace_delims[] = " \r\t\f\v\n";
468
478
const char comment_delim[] = "#";
481
custom_argv = malloc(sizeof(char*) * 2);
482
if(custom_argv == NULL){
484
exitstatus = EXIT_FAILURE;
487
custom_argv[0] = argv[0];
488
custom_argv[1] = NULL;
471
491
sret = getline(&org_line, &size, conffp);
482
502
new_arg = strdup(p);
483
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
484
if (custom_argv == NULL){
485
perror("add_to_argv");
486
exitstatus = EXIT_FAILURE;
505
exitstatus = EXIT_FAILURE;
511
custom_argv = realloc(custom_argv, sizeof(char *)
512
* ((unsigned int) custom_argc + 1));
513
if(custom_argv == NULL){
515
exitstatus = EXIT_FAILURE;
519
custom_argv[custom_argc-1] = new_arg;
520
custom_argv[custom_argc] = NULL;
502
534
if(custom_argv != NULL){
503
custom_argv[0] = argv[0];
504
535
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
505
536
if (ret == ARGP_ERR_UNKNOWN){
506
537
fprintf(stderr, "Unknown error while parsing arguments\n");
835
871
/* Remove the plugin */
836
872
FD_CLR(proc->fd, &rfds_all);
837
873
/* Block signal while modifying process_list */
838
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
874
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
840
876
perror("sigprocmask");
841
877
exitstatus = EXIT_FAILURE;
870
906
/* This process exited nicely, so print its buffer */
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
908
bool bret = print_out_password(proc->buffer,
909
proc->buffer_length);
874
911
perror("print_out_password");
875
912
exitstatus = EXIT_FAILURE;
914
951
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
952
/* Fallback if all plugins failed, none are found or an error
917
955
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
918
956
char *passwordbuffer = getpass("Password: ");