/mandos/release : revision 165

65

#include <errno.h> /* errno, EBADF */

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#define BUFFER_SIZE 256

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#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"

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#define PDIR "/lib/mandos/plugins.d"

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#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"

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const char *argp_program_version = "plugin-runner 1.0";

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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";

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struct process;

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typedef struct process{

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struct plugin;

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typedef struct plugin{

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char *name; /* can be NULL or any plugin name */

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char **argv;

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int argc;

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char **environ;

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int envc;

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bool disabled;

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/* Variables used for running processes*/

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pid_t pid;

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int fd;

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char *buffer;

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bool eof;

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volatile bool completed;

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volatile int status;

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struct process *next;

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} process;

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typedef struct plugin{

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char *name; /* can be NULL or any plugin name */

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char **argv;

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int argc;

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char **environ;

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int envc;

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bool disabled;

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struct plugin *next;

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} plugin;

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static plugin *getplugin(char *name, plugin **plugin_list){

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for (plugin *p = *plugin_list; p != NULL; p = p->next){

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static plugin *plugin_list = NULL;

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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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static plugin *getplugin(char *name){

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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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return p;

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*new_plugin = (plugin) { .name = copy_name,

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.argc = 1,

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.envc = 0,

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.disabled = false,

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.next = *plugin_list };

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.next = plugin_list };

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new_plugin->argv = malloc(sizeof(char *) * 2);

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if (new_plugin->argv == NULL){

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}

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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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if(new_plugin->environ == NULL){

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free(copy_name);

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return NULL;

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}

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new_plugin->environ[0] = NULL;

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/* Append the new plugin to the list */

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*plugin_list = new_plugin;

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plugin_list = new_plugin;

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return new_plugin;

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}

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}

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/* Add to a plugin's environment */

177

static bool add_environment(plugin *p, const char *def){

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static bool add_environment(plugin *p, const char *def, bool replace){

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183

if(p == NULL){

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return false;

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185

}

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/* namelen = length of name of environment variable */

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size_t namelen = (size_t)(strchrnul(def, '=') - def);

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/* Search for this environment variable */

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for(char **e = p->environ; *e != NULL; e++){

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if(strncmp(*e, def, namelen + 1) == 0){

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/* It already exists */

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if(replace){

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char *new = realloc(*e, strlen(def) + 1);

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if(new == NULL){

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return false;

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}

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*e = new;

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strcpy(*e, def);

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}

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return true;

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}

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}

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return add_to_char_array(def, &(p->environ), &(p->envc));

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}

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/*

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* Based on the example in the GNU LibC manual chapter 13.13 "File

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* Descriptor Flags".

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return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);

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}

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process *process_list = NULL;

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/* Mark processes as completed when they exit, and save their exit

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status. */

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void handle_sigchld(__attribute__((unused)) int sig){

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while(true){

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process *proc = process_list;

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plugin *proc = plugin_list;

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int status;

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pid_t pid = waitpid(-1, &status, WNOHANG);

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if(pid == 0){

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/* No child processes */

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break;

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}

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/* A child exited, find it in process_list */

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while(proc != NULL and proc->pid != pid){

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proc = proc->next;

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}

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}

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/* Prints out a password to stdout */

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bool print_out_password(const char *buffer, size_t length){

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257

ssize_t ret;

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if(length>0 and buffer[length-1] == '\n'){

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return true;

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}

249

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char **add_to_argv(char **argv, int *argc, char *arg){

251

if (argv == NULL){

252

*argc = 1;

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argv = malloc(sizeof(char*) * 2);

254

if(argv == NULL){

255

return NULL;

271

/* Removes and free a plugin from the plugin list */

272

static void free_plugin(plugin *plugin_node){

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for(char **arg = plugin_node->argv; *arg != NULL; arg++){

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free(*arg);

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}

277

free(plugin_node->argv);

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for(char **env = plugin_node->environ; *env != NULL; env++){

279

free(*env);

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}

281

free(plugin_node->environ);

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free(plugin_node->buffer);

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/* Removes the plugin from the singly-linked list */

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if(plugin_node == plugin_list){

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/* First one - simple */

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plugin_list = plugin_list->next;

288

} else {

289

/* Second one or later */

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for(plugin *p = plugin_list; p != NULL; p = p->next){

291

if(p->next == plugin_node){

292

p->next = plugin_node->next;

293

break;

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}

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}

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argv[0] = NULL; /* Will be set to argv[0] in main before parsing */

258

argv[1] = NULL;

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}

260

*argc += 1;

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argv = realloc(argv, sizeof(char *)

262

* ((unsigned int) *argc + 1));

263

if(argv == NULL){

264

return NULL;

265

}

266

argv[*argc-1] = arg;

267

argv[*argc] = NULL;

268

return argv;

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}

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free(plugin_node);

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}

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static void free_plugin_list(plugin *plugin_list){

272

for(plugin *next; plugin_list != NULL; plugin_list = next){

273

next = plugin_list->next;

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for(char **arg = plugin_list->argv; *arg != NULL; arg++){

275

free(*arg);

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}

277

free(plugin_list->argv);

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for(char **env = plugin_list->environ; *env != NULL; env++){

279

free(*env);

280

}

281

free(plugin_list->environ);

282

free(plugin_list);

301

static void free_plugin_list(void){

302

while(plugin_list != NULL){

303

free_plugin(plugin_list);

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}

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}

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int main(int argc, char *argv[]){

287

const char *plugindir = "/lib/mandos/plugins.d";

288

const char *argfile = ARGFILE;

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char *plugindir = NULL;

309

char *argfile = NULL;

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FILE *conffp;

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size_t d_name_len;

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DIR *dir = NULL;

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{ .name = "global-options", .key = 'g',

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.arg = "OPTION[,OPTION[,...]]",

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.doc = "Options passed to all plugins" },

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{ .name = "global-envs", .key = 'e',

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{ .name = "global-env", .key = 'G',

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.arg = "VAR=value",

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.doc = "Environment variable passed to all plugins" },

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{ .name = "options-for", .key = 'o',

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.arg = "PLUGIN:OPTION[,OPTION[,...]]",

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.doc = "Options passed only to specified plugin" },

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{ .name = "envs-for", .key = 'f',

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{ .name = "env-for", .key = 'E',

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.arg = "PLUGIN:ENV=value",

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.doc = "Environment variable passed to specified plugin" },

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{ .name = "disable", .key = 'd',

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.arg = "PLUGIN",

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.doc = "Disable a specific plugin", .group = 1 },

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{ .name = "enable", .key = 'e',

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.arg = "PLUGIN",

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.doc = "Enable a specific plugin", .group = 1 },

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{ .name = "plugin-dir", .key = 128,

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.arg = "DIRECTORY",

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.doc = "Specify a different plugin directory", .group = 2 },

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{ .name = "userid", .key = 129,

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.arg = "ID", .flags = 0,

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.doc = "User ID the plugins will run as", .group = 2 },

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{ .name = "groupid", .key = 130,

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.arg = "ID", .flags = 0,

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.doc = "Group ID the plugins will run as", .group = 2 },

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{ .name = "debug", .key = 131,

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.doc = "Debug mode", .group = 3 },

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{ .name = "config-file", .key = 129,

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.arg = "FILE",

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.doc = "Specify a different configuration file", .group = 2 },

368

{ .name = "userid", .key = 130,

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.arg = "ID", .flags = 0,

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.doc = "User ID the plugins will run as", .group = 3 },

371

{ .name = "groupid", .key = 131,

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.arg = "ID", .flags = 0,

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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 = NULL }

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377

};

351

378

352

error_t parse_opt (int key, char *arg, struct argp_state *state) {

353

/* Get the INPUT argument from `argp_parse', which we know is a

354

pointer to our plugin list pointer. */

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plugin **plugins = state->input;

379

error_t parse_opt (int key, char *arg, __attribute__((unused))

380

struct argp_state *state) {

356

381

switch (key) {

357

case 'g':

382

case 'g': /* --global-options */

358

383

if (arg != NULL){

359

384

char *p;

360

385

while((p = strsep(&arg, ",")) != NULL){

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if(p[0] == '\0'){

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387

continue;

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388

}

364

if(not add_argument(getplugin(NULL, plugins), p)){

389

if(not add_argument(getplugin(NULL), p)){

365

390

perror("add_argument");

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391

return ARGP_ERR_UNKNOWN;

367

392

}

368

393

}

369

394

}

370

395

break;

371

case 'e':

396

case 'G': /* --global-env */

372

397

if(arg == NULL){

373

398

break;

374

399

}

377

402

if(envdef == NULL){

378

403

break;

379

404

}

380

if(not add_environment(getplugin(NULL, plugins), envdef)){

405

if(not add_environment(getplugin(NULL), envdef, true)){

381

406

perror("add_environment");

382

407

}

383

408

}

384

409

break;

385

case 'o':

410

case 'o': /* --options-for */

386

411

if (arg != NULL){

387

412

char *p_name = strsep(&arg, ":");

388

if(p_name[0] == '\0'){

413

if(p_name[0] == '\0' or arg == NULL){

389

414

break;

390

415

}

391

416

char *opt = strsep(&arg, ":");

392

if(opt[0] == '\0'){

417

if(opt[0] == '\0' or opt == NULL){

393

418

break;

394

419

}

395

if(opt != NULL){

396

char *p;

397

while((p = strsep(&opt, ",")) != NULL){

398

if(p[0] == '\0'){

399

continue;

400

}

401

if(not add_argument(getplugin(p_name, plugins), p)){

402

perror("add_argument");

403

return ARGP_ERR_UNKNOWN;

404

}

420

char *p;

421

while((p = strsep(&opt, ",")) != NULL){

422

if(p[0] == '\0'){

423

continue;

424

}

425

if(not add_argument(getplugin(p_name), p)){

426

perror("add_argument");

427

return ARGP_ERR_UNKNOWN;

405

428

}

406

429

}

407

430

}

408

431

break;

409

case 'f':

432

case 'E': /* --env-for */

410

433

if(arg == NULL){

411

434

break;

412

435

}

420

443

break;

421

444

}

422

445

envdef++;

423

if(not add_environment(getplugin(p_name, plugins), envdef)){

446

if(not add_environment(getplugin(p_name), envdef, true)){

424

447

perror("add_environment");

425

448

}

426

449

}

427

450

break;

428

case 'd':

451

case 'd': /* --disable */

429

452

if (arg != NULL){

430

plugin *p = getplugin(arg, plugins);

453

plugin *p = getplugin(arg);

431

454

if(p == NULL){

432

455

return ARGP_ERR_UNKNOWN;

433

456

}

434

457

p->disabled = true;

435

458

}

436

459

break;

437

case 128:

438

plugindir = arg;

439

break;

440

case 129:

460

case 'e': /* --enable */

461

if (arg != NULL){

462

plugin *p = getplugin(arg);

463

if(p == NULL){

464

return ARGP_ERR_UNKNOWN;

465

}

466

p->disabled = false;

467

}

468

break;

469

case 128: /* --plugin-dir */

470

plugindir = strdup(arg);

471

if(plugindir == NULL){

472

perror("strdup");

473

}

474

break;

475

case 129: /* --config-file */

476

/* This is already done by parse_opt_config_file() */

477

break;

478

case 130: /* --userid */

441

479

uid = (uid_t)strtol(arg, NULL, 10);

442

480

break;

443

case 130:

481

case 131: /* --groupid */

444

482

gid = (gid_t)strtol(arg, NULL, 10);

445

483

break;

446

case 131:

484

case 132: /* --debug */

447

485

debug = true;

448

486

break;

449

487

case ARGP_KEY_ARG:

457

495

return 0;

458

496

}

459

497

460

plugin *plugin_list = NULL;

498

/* This option parser is the same as parse_opt() above, except it

499

ignores everything but the --config-file option. */

500

error_t parse_opt_config_file (int key, char *arg,

501

__attribute__((unused))

502

struct argp_state *state) {

503

switch (key) {

504

case 'g': /* --global-options */

505

case 'G': /* --global-env */

506

case 'o': /* --options-for */

507

case 'E': /* --env-for */

508

case 'd': /* --disable */

509

case 'e': /* --enable */

510

case 128: /* --plugin-dir */

511

break;

512

case 129: /* --config-file */

513

argfile = strdup(arg);

514

if(argfile == NULL){

515

perror("strdup");

516

}

517

break;

518

case 130: /* --userid */

519

case 131: /* --groupid */

520

case 132: /* --debug */

521

case ARGP_KEY_ARG:

522

case ARGP_KEY_END:

523

break;

524

default:

525

return ARGP_ERR_UNKNOWN;

526

}

527

return 0;

528

}

461

529

462

struct argp argp = { .options = options, .parser = parse_opt,

463

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

530

struct argp argp = { .options = options,

531

.parser = parse_opt_config_file,

532

.args_doc = "",

464

533

.doc = "Mandos plugin runner -- Run plugins" };

465

534

466

ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);

535

/* Parse using the parse_opt_config_file in order to get the custom

536

config file location, if any. */

537

ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

467

538

if (ret == ARGP_ERR_UNKNOWN){

468

539

fprintf(stderr, "Unknown error while parsing arguments\n");

469

540

exitstatus = EXIT_FAILURE;

470

541

goto fallback;

471

542

}

472

473

conffp = fopen(argfile, "r");

543

544

/* Reset to the normal argument parser */

545

argp.parser = parse_opt;

546

547

/* Open the configfile if available */

548

if (argfile == NULL){

549

conffp = fopen(AFILE, "r");

550

} else {

551

conffp = fopen(argfile, "r");

552

}

474

553

if(conffp != NULL){

475

554

char *org_line = NULL;

476

555

char *p, *arg, *new_arg, *line;

479

558

const char whitespace_delims[] = " \r\t\f\v\n";

480

559

const char comment_delim[] = "#";

481

560

561

custom_argc = 1;

562

custom_argv = malloc(sizeof(char*) * 2);

563

if(custom_argv == NULL){

564

perror("malloc");

565

exitstatus = EXIT_FAILURE;

566

goto fallback;

567

}

568

custom_argv[0] = argv[0];

569

custom_argv[1] = NULL;

570

571

/* for each line in the config file, strip whitespace and ignore

572

commented text */

482

573

while(true){

483

574

sret = getline(&org_line, &size, conffp);

484

575

if(sret == -1){

492

583

continue;

493

584

}

494

585

new_arg = strdup(p);

495

custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);

496

if (custom_argv == NULL){

497

perror("add_to_argv");

498

exitstatus = EXIT_FAILURE;

499

goto fallback;

500

}

586

if(new_arg == NULL){

587

perror("strdup");

588

exitstatus = EXIT_FAILURE;

589

free(org_line);

590

goto fallback;

591

}

592

593

custom_argc += 1;

594

custom_argv = realloc(custom_argv, sizeof(char *)

595

* ((unsigned int) custom_argc + 1));

596

if(custom_argv == NULL){

597

perror("realloc");

598

exitstatus = EXIT_FAILURE;

599

free(org_line);

600

goto fallback;

601

}

602

custom_argv[custom_argc-1] = new_arg;

603

custom_argv[custom_argc] = NULL;

501

604

}

502

605

}

503

606

free(org_line);

504

} else{

607

} else {

505

608

/* Check for harmful errors and go to fallback. Other errors might

506

609

not affect opening plugins */

507

610

if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){

510

613

goto fallback;

511

614

}

512

615

}

513

616

/* If there was any arguments from configuration file,

617

pass them to parser as command arguments */

514

618

if(custom_argv != NULL){

515

custom_argv[0] = argv[0];

516

ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);

619

ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,

620

0, NULL);

517

621

if (ret == ARGP_ERR_UNKNOWN){

518

622

fprintf(stderr, "Unknown error while parsing arguments\n");

519

623

exitstatus = EXIT_FAILURE;

521

625

}

522

626

}

523

627

628

/* Parse actual command line arguments, to let them override the

629

config file */

630

ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

631

if (ret == ARGP_ERR_UNKNOWN){

632

fprintf(stderr, "Unknown error while parsing arguments\n");

633

exitstatus = EXIT_FAILURE;

634

goto fallback;

635

}

636

524

637

if(debug){

525

638

for(plugin *p = plugin_list; p != NULL; p=p->next){

526

639

fprintf(stderr, "Plugin: %s has %d arguments\n",

535

648

}

536

649

}

537

650

651

/* Strip permissions down to nobody */

538

652

ret = setuid(uid);

539

653

if (ret == -1){

540

654

perror("setuid");

541

}

542

655

}

543

656

setgid(gid);

544

657

if (ret == -1){

545

658

perror("setgid");

546

659

}

547

660

548

dir = opendir(plugindir);

661

if (plugindir == NULL){

662

dir = opendir(PDIR);

663

} else {

664

dir = opendir(plugindir);

665

}

666

549

667

if(dir == NULL){

550

668

perror("Could not open plugin dir");

551

669

exitstatus = EXIT_FAILURE;

567

685

568

686

FD_ZERO(&rfds_all);

569

687

688

/* Read and execute any executable in the plugin directory*/

570

689

while(true){

571

690

dirst = readdir(dir);

572

691

573

// All directory entries have been processed

692

/* All directory entries have been processed */

574

693

if(dirst == NULL){

575

694

if (errno == EBADF){

576

695

perror("readdir");

582

701

583

702

d_name_len = strlen(dirst->d_name);

584

703

585

// Ignore dotfiles, backup files and other junk

704

/* Ignore dotfiles, backup files and other junk */

586

705

{

587

706

bool bad_name = false;

588

707

603

722

break;

604

723

}

605

724

}

606

607

725

if(bad_name){

608

726

continue;

609

727

}

610

611

728

for(const char **suf = bad_suffixes; *suf != NULL; suf++){

612

729

size_t suf_len = strlen(*suf);

613

730

if((d_name_len >= suf_len)

640

757

free(filename);

641

758

continue;

642

759

}

643

760

761

/* Ignore non-executable files */

644

762

if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){

645

763

if(debug){

646

764

fprintf(stderr, "Ignoring plugin dir entry \"%s\""

649

767

free(filename);

650

768

continue;

651

769

}

652

plugin *p = getplugin(dirst->d_name, &plugin_list);

770

771

plugin *p = getplugin(dirst->d_name);

653

772

if(p == NULL){

654

773

perror("getplugin");

655

774

free(filename);

665

784

}

666

785

{

667

786

/* Add global arguments to argument list for this plugin */

668

plugin *g = getplugin(NULL, &plugin_list);

787

plugin *g = getplugin(NULL);

669

788

if(g != NULL){

670

789

for(char **a = g->argv + 1; *a != NULL; a++){

671

790

if(not add_argument(p, *a)){

674

793

}

675

794

/* Add global environment variables */

676

795

for(char **e = g->environ; *e != NULL; e++){

677

if(not add_environment(p, *e)){

796

if(not add_environment(p, *e, false)){

678

797

perror("add_environment");

679

798

}

680

799

}

685

804

process, too. */

686

805

if(p->environ[0] != NULL){

687

806

for(char **e = environ; *e != NULL; e++){

688

char *copy = strdup(*e);

689

if(copy == NULL){

690

perror("strdup");

691

continue;

692

}

693

if(not add_environment(p, copy)){

807

if(not add_environment(p, *e, false)){

694

808

perror("add_environment");

695

809

}

696

810

}

703

817

exitstatus = EXIT_FAILURE;

704

818

goto fallback;

705

819

}

820

/* Ask OS to automatic close the pipe on exec */

706

821

ret = set_cloexec_flag(pipefd[0]);

707

822

if(ret < 0){

708

823

perror("set_cloexec_flag");

722

837

exitstatus = EXIT_FAILURE;

723

838

goto fallback;

724

839

}

725

// Starting a new process to be watched

840

/* Starting a new process to be watched */

726

841

pid_t pid = fork();

727

842

if(pid == -1){

728

843

perror("fork");

766

881

}

767

882

/* no return */

768

883

}

769

/* parent process */

884

/* Parent process */

885

close(pipefd[1]); /* Close unused write end of pipe */

770

886

free(filename);

771

close(pipefd[1]); /* close unused write end of pipe */

772

process *new_process = malloc(sizeof(process));

773

if (new_process == NULL){

774

perror("malloc");

887

plugin *new_plugin = getplugin(dirst->d_name);

888

if (new_plugin == NULL){

889

perror("getplugin");

775

890

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

776

891

if(ret < 0){

777

perror("sigprocmask");

892

perror("sigprocmask");

778

893

}

779

894

exitstatus = EXIT_FAILURE;

780

895

goto fallback;

781

896

}

782

897

783

*new_process = (struct process){ .pid = pid,

784

.fd = pipefd[0],

785

.next = process_list };

786

// List handling

787

process_list = new_process;

898

new_plugin->pid = pid;

899

new_plugin->fd = pipefd[0];

900

788

901

/* Unblock SIGCHLD so signal handler can be run if this process

789

902

has already completed */

790

903

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

794

907

goto fallback;

795

908

}

796

909

797

FD_SET(new_process->fd, &rfds_all);

910

FD_SET(new_plugin->fd, &rfds_all);

798

911

799

if (maxfd < new_process->fd){

800

maxfd = new_process->fd;

912

if (maxfd < new_plugin->fd){

913

maxfd = new_plugin->fd;

801

914

}

802

915

803

916

}

804

917

805

free_plugin_list(plugin_list);

806

plugin_list = NULL;

807

808

918

closedir(dir);

809

919

dir = NULL;

810

811

if (process_list == NULL){

812

fprintf(stderr, "No plugin processes started. Incorrect plugin"

813

" directory?\n");

814

process_list = NULL;

920

921

for(plugin *p = plugin_list; p != NULL; p = p->next){

922

if(p->pid != 0){

923

break;

924

}

925

if(p->next == NULL){

926

fprintf(stderr, "No plugin processes started. Incorrect plugin"

927

" directory?\n");

928

free_plugin_list();

929

}

815

930

}

816

while(process_list){

931

932

/* Main loop while running plugins exist */

933

while(plugin_list){

817

934

fd_set rfds = rfds_all;

818

935

int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);

819

936

if (select_ret == -1){

823

940

}

824

941

/* OK, now either a process completed, or something can be read

825

942

from one of them */

826

for(process *proc = process_list; proc ; proc = proc->next){

943

for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){

827

944

/* Is this process completely done? */

828

945

if(proc->eof and proc->completed){

829

946

/* Only accept the plugin output if it exited cleanly */

830

947

if(not WIFEXITED(proc->status)

831

948

or WEXITSTATUS(proc->status) != 0){

832

949

/* Bad exit by plugin */

950

833

951

if(debug){

834

952

if(WIFEXITED(proc->status)){

835

953

fprintf(stderr, "Plugin %u exited with status %d\n",

844

962

(unsigned int) (proc->pid));

845

963

}

846

964

}

965

847

966

/* Remove the plugin */

848

967

FD_CLR(proc->fd, &rfds_all);

968

849

969

/* Block signal while modifying process_list */

850

970

ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);

851

971

if(ret < 0){

853

973

exitstatus = EXIT_FAILURE;

854

974

goto fallback;

855

975

}

856

/* Delete this process entry from the list */

857

if(process_list == proc){

858

/* First one - simple */

859

process_list = proc->next;

860

} else {

861

/* Second one or later */

862

for(process *p = process_list; p != NULL; p = p->next){

863

if(p->next == proc){

864

p->next = proc->next;

865

break;

866

}

867

}

868

}

976

free_plugin(proc);

869

977

/* We are done modifying process list, so unblock signal */

870

978

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

871

979

NULL);

872

980

if(ret < 0){

873

981

perror("sigprocmask");

874

}

875

free(proc->buffer);

876

free(proc);

877

/* We deleted this process from the list, so we can't go

878

proc->next. Therefore, start over from the beginning of

879

the process list */

880

break;

982

exitstatus = EXIT_FAILURE;

983

goto fallback;

984

}

985

986

if(plugin_list == NULL){

987

break;

988

}

989

continue;

881

990

}

991

882

992

/* This process exited nicely, so print its buffer */

883

993

884

994

bool bret = print_out_password(proc->buffer,

889

999

}

890

1000

goto fallback;

891

1001

}

1002

892

1003

/* This process has not completed. Does it have any output? */

893

1004

if(proc->eof or not FD_ISSET(proc->fd, &rfds)){

894

1005

/* This process had nothing to say at this time */

924

1035

925

1036

fallback:

926

1037

927

if(process_list == NULL or exitstatus != EXIT_SUCCESS){

1038

if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){

928

1039

/* Fallback if all plugins failed, none are found or an error

929

1040

occured */

930

1041

bool bret;

945

1056

}

946

1057

947

1058

if(custom_argv != NULL){

948

for(char **arg = custom_argv; *arg != NULL; arg++){

1059

for(char **arg = custom_argv+1; *arg != NULL; arg++){

949

1060

free(*arg);

950

1061

}

951

1062

free(custom_argv);

952

1063

}

953

free_plugin_list(plugin_list);

954

1064

955

1065

if(dir != NULL){

956

1066

closedir(dir);

957

1067

}

958

1068

959

1069

/* Free the process list and kill the processes */

960

for(process *next; process_list != NULL; process_list = next){

961

next = process_list->next;

962

close(process_list->fd);

963

ret = kill(process_list->pid, SIGTERM);

964

if(ret == -1 and errno != ESRCH){

965

/* set-uid proccesses migth not get closed */

966

perror("kill");

1070

for(plugin *p = plugin_list; p != NULL; p = p->next){

1071

if(p->pid != 0){

1072

close(p->fd);

1073

ret = kill(p->pid, SIGTERM);

1074

if(ret == -1 and errno != ESRCH){

1075

/* Set-uid proccesses might not get closed */

1076

perror("kill");

1077

}

967

1078

}

968

free(process_list->buffer);

969

free(process_list);

970

1079

}

971

1080

972

1081

/* Wait for any remaining child processes to terminate */

976

1085

if(errno != ECHILD){

977

1086

perror("wait");

978

1087

}

1088

1089

free_plugin_list();

1090

1091

free(plugindir);

1092

free(argfile);

979

1093

980

1094

return exitstatus;

981

1095

}