/mandos/trunk : revision 105

65

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

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#define BUFFER_SIZE 256

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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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#define ARGFILE "/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 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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struct process;

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typedef struct process{

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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 *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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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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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 */

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

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

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if(p == NULL){

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return false;

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}

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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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plugin *proc = plugin_list;

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process *proc = process_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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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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}

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

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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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}

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free(plugin_node->argv);

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

279

free(*env);

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}

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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;

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} else {

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/* Second one or later */

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

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if(p->next == plugin_node){

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p->next = plugin_node->next;

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break;

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}

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

251

if (argv == NULL){

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*argc = 1;

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

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if(argv == NULL){

255

return NULL;

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}

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}

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free(plugin_node);

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

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parsing */

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argv[1] = NULL;

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}

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*argc += 1;

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argv = realloc(argv, sizeof(char *)

263

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

264

if(argv == NULL){

265

return NULL;

266

}

267

argv[*argc-1] = arg;

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argv[*argc] = NULL;

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return argv;

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}

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static void free_plugin_list(void){

302

while(plugin_list != NULL){

303

free_plugin(plugin_list);

272

static void free_plugin_list(plugin *plugin_list){

273

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

274

next = plugin_list->next;

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

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free(*arg);

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}

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free(plugin_list->argv);

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

280

free(*env);

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}

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free(plugin_list->environ);

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free(plugin_list);

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}

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}

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

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char *plugindir = NULL;

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char *argfile = NULL;

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

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const char *argfile = ARGFILE;

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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-env", .key = 'G',

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

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

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

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

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.arg = "FILE",

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

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{ .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 },

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{ .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 = "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 = NULL }

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};

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

380

struct argp_state *state) {

353

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

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

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pointer to our plugin list pointer. */

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plugin **plugins = state->input;

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switch (key) {

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

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case 'g':

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if (arg != NULL){

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char *p;

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

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

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continue;

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364

}

389

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

365

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

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perror("add_argument");

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return ARGP_ERR_UNKNOWN;

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}

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}

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370

}

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break;

396

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

372

case 'e':

397

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if(arg == NULL){

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374

break;

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375

}

402

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if(envdef == NULL){

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break;

404

380

}

405

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

381

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

406

382

perror("add_environment");

407

383

}

408

384

}

409

385

break;

410

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

386

case 'o':

411

387

if (arg != NULL){

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388

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

413

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

389

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

414

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break;

415

391

}

416

392

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

417

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

393

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

418

394

break;

419

395

}

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;

396

if(opt != NULL){

397

char *p;

398

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

399

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

400

continue;

401

}

402

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

403

perror("add_argument");

404

return ARGP_ERR_UNKNOWN;

405

}

428

406

}

429

407

}

430

408

}

431

409

break;

432

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

410

case 'f':

433

411

if(arg == NULL){

434

412

break;

435

413

}

443

421

break;

444

422

}

445

423

envdef++;

446

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

424

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

447

425

perror("add_environment");

448

426

}

449

427

}

450

428

break;

451

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

429

case 'd':

452

430

if (arg != NULL){

453

plugin *p = getplugin(arg);

431

plugin *p = getplugin(arg, plugins);

454

432

if(p == NULL){

455

433

return ARGP_ERR_UNKNOWN;

456

434

}

457

435

p->disabled = true;

458

436

}

459

437

break;

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 */

438

case 128:

439

plugindir = arg;

440

break;

441

case 129:

479

442

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

480

443

break;

481

case 131: /* --groupid */

444

case 130:

482

445

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

483

446

break;

484

case 132: /* --debug */

447

case 131:

485

448

debug = true;

486

449

break;

487

450

case ARGP_KEY_ARG:

495

458

return 0;

496

459

}

497

460

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

plugin *plugin_list = NULL;

529

462

530

struct argp argp = { .options = options,

531

.parser = parse_opt_config_file,

532

.args_doc = "",

463

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

464

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

533

465

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

534

466

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

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

538

468

if (ret == ARGP_ERR_UNKNOWN){

539

469

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

540

470

exitstatus = EXIT_FAILURE;

541

471

goto fallback;

542

472

}

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

}

473

474

conffp = fopen(argfile, "r");

553

475

if(conffp != NULL){

554

476

char *org_line = NULL;

555

477

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

558

480

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

559

481

const char comment_delim[] = "#";

560

482

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 */

573

483

while(true){

574

484

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

575

485

if(sret == -1){

583

493

continue;

584

494

}

585

495

new_arg = strdup(p);

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;

496

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

497

if (custom_argv == NULL){

498

perror("add_to_argv");

499

exitstatus = EXIT_FAILURE;

500

goto fallback;

501

}

604

502

}

605

503

}

606

504

free(org_line);

607

} else {

505

} else{

608

506

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

609

507

not affect opening plugins */

610

508

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

613

511

goto fallback;

614

512

}

615

513

}

616

/* If there was any arguments from configuration file,

617

pass them to parser as command arguments */

514

618

515

if(custom_argv != NULL){

619

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

620

0, NULL);

516

custom_argv[0] = argv[0];

517

ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,

518

&plugin_list);

621

519

if (ret == ARGP_ERR_UNKNOWN){

622

520

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

623

521

exitstatus = EXIT_FAILURE;

625

523

}

626

524

}

627

525

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

637

526

if(debug){

638

527

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

639

528

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

648

537

}

649

538

}

650

539

651

/* Strip permissions down to nobody */

652

540

ret = setuid(uid);

653

541

if (ret == -1){

654

542

perror("setuid");

655

}

543

}

544

656

545

setgid(gid);

657

546

if (ret == -1){

658

547

perror("setgid");

659

548

}

660

549

661

if (plugindir == NULL){

662

dir = opendir(PDIR);

663

} else {

664

dir = opendir(plugindir);

665

}

666

550

dir = opendir(plugindir);

667

551

if(dir == NULL){

668

552

perror("Could not open plugin dir");

669

553

exitstatus = EXIT_FAILURE;

685

569

686

570

FD_ZERO(&rfds_all);

687

571

688

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

689

572

while(true){

690

573

dirst = readdir(dir);

691

574

692

/* All directory entries have been processed */

575

// All directory entries have been processed

693

576

if(dirst == NULL){

694

577

if (errno == EBADF){

695

578

perror("readdir");

701

584

702

585

d_name_len = strlen(dirst->d_name);

703

586

704

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

587

// Ignore dotfiles, backup files and other junk

705

588

{

706

589

bool bad_name = false;

707

590

722

605

break;

723

606

}

724

607

}

608

725

609

if(bad_name){

726

610

continue;

727

611

}

612

728

613

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

729

614

size_t suf_len = strlen(*suf);

730

615

if((d_name_len >= suf_len)

757

642

free(filename);

758

643

continue;

759

644

}

760

761

/* Ignore non-executable files */

645

762

646

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

763

647

if(debug){

764

648

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

767

651

free(filename);

768

652

continue;

769

653

}

770

771

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

654

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

772

655

if(p == NULL){

773

656

perror("getplugin");

774

657

free(filename);

784

667

}

785

668

{

786

669

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

787

plugin *g = getplugin(NULL);

670

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

788

671

if(g != NULL){

789

672

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

790

673

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

793

676

}

794

677

/* Add global environment variables */

795

678

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

796

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

679

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

797

680

perror("add_environment");

798

681

}

799

682

}

804

687

process, too. */

805

688

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

806

689

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

807

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

690

char *copy = strdup(*e);

691

if(copy == NULL){

692

perror("strdup");

693

continue;

694

}

695

if(not add_environment(p, copy)){

808

696

perror("add_environment");

809

697

}

810

698

}

817

705

exitstatus = EXIT_FAILURE;

818

706

goto fallback;

819

707

}

820

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

821

708

ret = set_cloexec_flag(pipefd[0]);

822

709

if(ret < 0){

823

710

perror("set_cloexec_flag");

837

724

exitstatus = EXIT_FAILURE;

838

725

goto fallback;

839

726

}

840

/* Starting a new process to be watched */

727

// Starting a new process to be watched

841

728

pid_t pid = fork();

842

729

if(pid == -1){

843

730

perror("fork");

881

768

}

882

769

/* no return */

883

770

}

884

/* Parent process */

885

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

771

/* parent process */

886

772

free(filename);

887

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

888

if (new_plugin == NULL){

889

perror("getplugin");

773

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

774

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

775

if (new_process == NULL){

776

perror("malloc");

890

777

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

891

778

if(ret < 0){

892

perror("sigprocmask");

779

perror("sigprocmask");

893

780

}

894

781

exitstatus = EXIT_FAILURE;

895

782

goto fallback;

896

783

}

897

784

898

new_plugin->pid = pid;

899

new_plugin->fd = pipefd[0];

900

785

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

786

.fd = pipefd[0],

787

.next = process_list };

788

// List handling

789

process_list = new_process;

901

790

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

902

791

has already completed */

903

792

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

907

796

goto fallback;

908

797

}

909

798

910

FD_SET(new_plugin->fd, &rfds_all);

799

FD_SET(new_process->fd, &rfds_all);

911

800

912

if (maxfd < new_plugin->fd){

913

maxfd = new_plugin->fd;

801

if (maxfd < new_process->fd){

802

maxfd = new_process->fd;

914

803

}

915

804

916

805

}

917

806

807

free_plugin_list(plugin_list);

808

plugin_list = NULL;

809

918

810

closedir(dir);

919

811

dir = 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

}

812

813

if (process_list == NULL){

814

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

815

" directory?\n");

816

process_list = NULL;

930

817

}

931

932

/* Main loop while running plugins exist */

933

while(plugin_list){

818

while(process_list){

934

819

fd_set rfds = rfds_all;

935

820

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

936

821

if (select_ret == -1){

940

825

}

941

826

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

942

827

from one of them */

943

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

828

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

944

829

/* Is this process completely done? */

945

830

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

946

831

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

947

832

if(not WIFEXITED(proc->status)

948

833

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

949

834

/* Bad exit by plugin */

950

951

835

if(debug){

952

836

if(WIFEXITED(proc->status)){

953

837

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

962

846

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

963

847

}

964

848

}

965

966

849

/* Remove the plugin */

967

850

FD_CLR(proc->fd, &rfds_all);

968

969

851

/* Block signal while modifying process_list */

970

852

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

971

853

if(ret < 0){

973

855

exitstatus = EXIT_FAILURE;

974

856

goto fallback;

975

857

}

976

free_plugin(proc);

858

/* Delete this process entry from the list */

859

if(process_list == proc){

860

/* First one - simple */

861

process_list = proc->next;

862

} else {

863

/* Second one or later */

864

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

865

if(p->next == proc){

866

p->next = proc->next;

867

break;

868

}

869

}

870

}

977

871

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

978

872

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

979

873

NULL);

980

874

if(ret < 0){

981

875

perror("sigprocmask");

982

exitstatus = EXIT_FAILURE;

983

goto fallback;

984

}

985

986

if(plugin_list == NULL){

987

break;

988

}

989

continue;

876

}

877

free(proc->buffer);

878

free(proc);

879

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

880

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

881

the process list */

882

break;

990

883

}

991

992

884

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

993

885

994

886

bool bret = print_out_password(proc->buffer,

999

891

}

1000

892

goto fallback;

1001

893

}

1002

1003

894

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

1004

895

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

1005

896

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

1035

926

1036

927

fallback:

1037

928

1038

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

929

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

1039

930

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

1040

931

occured */

1041

932

bool bret;

1056

947

}

1057

948

1058

949

if(custom_argv != NULL){

1059

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

950

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

1060

951

free(*arg);

1061

952

}

1062

953

free(custom_argv);

1063

954

}

955

free_plugin_list(plugin_list);

1064

956

1065

957

if(dir != NULL){

1066

958

closedir(dir);

1067

959

}

1068

960

1069

961

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

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

}

962

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

963

next = process_list->next;

964

close(process_list->fd);

965

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

966

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

967

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

968

perror("kill");

1078

969

}

970

free(process_list->buffer);

971

free(process_list);

1079

972

}

1080

973

1081

974

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

1085

978

if(errno != ECHILD){

1086

979

perror("wait");

1087

980

}

1088

1089

free_plugin_list();

1090

1091

free(plugindir);

1092

free(argfile);

1093

981

1094

982

return exitstatus;

1095

983

}