/mandos/trunk : revision 147

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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91

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;

91

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 a 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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return NULL;

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}

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}

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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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128

if (new_plugin->argv == NULL){

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132

}

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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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148

}

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174

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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){

182

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

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183

if(p == NULL){

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184

return false;

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185

}

186

/* 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));

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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);

199

}

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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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252

}

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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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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 */

285

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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}

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

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parsing */

259

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){

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return NULL;

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}

267

argv[*argc-1] = arg;

268

argv[*argc] = NULL;

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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){

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++){

276

free(*arg);

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}

278

free(plugin_list->argv);

279

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

280

free(*env);

281

}

282

free(plugin_list->environ);

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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[]){

288

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

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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 },

365

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

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.arg = "FILE",

367

.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 },

371

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

372

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

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

374

{ .name = "debug", .key = 132,

375

.doc = "Debug mode", .group = 4 },

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{ .name = NULL }

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377

};

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378

353

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

354

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

355

pointer to our plugin list pointer. */

356

plugin **plugins = state->input;

379

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

380

struct argp_state *state) {

357

381

switch (key) {

358

case 'g':

382

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

359

383

if (arg != NULL){

360

384

char *p;

361

385

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

362

386

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

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387

continue;

364

388

}

365

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

389

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

366

390

perror("add_argument");

367

391

return ARGP_ERR_UNKNOWN;

368

392

}

369

393

}

370

394

}

371

395

break;

372

case 'e':

396

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

373

397

if(arg == NULL){

374

398

break;

375

399

}

378

402

if(envdef == NULL){

379

403

break;

380

404

}

381

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

405

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

382

406

perror("add_environment");

383

407

}

384

408

}

385

409

break;

386

case 'o':

410

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

387

411

if (arg != NULL){

388

412

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

389

413

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

399

423

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

400

424

continue;

401

425

}

402

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

426

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

403

427

perror("add_argument");

404

428

return ARGP_ERR_UNKNOWN;

405

429

}

407

431

}

408

432

}

409

433

break;

410

case 'f':

434

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

411

435

if(arg == NULL){

412

436

break;

413

437

}

421

445

break;

422

446

}

423

447

envdef++;

424

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

448

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

425

449

perror("add_environment");

426

450

}

427

451

}

428

452

break;

429

case 'd':

453

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

430

454

if (arg != NULL){

431

plugin *p = getplugin(arg, plugins);

455

plugin *p = getplugin(arg);

432

456

if(p == NULL){

433

457

return ARGP_ERR_UNKNOWN;

434

458

}

435

459

p->disabled = true;

436

460

}

437

461

break;

438

case 128:

439

plugindir = arg;

440

break;

441

case 129:

462

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

463

if (arg != NULL){

464

plugin *p = getplugin(arg);

465

if(p == NULL){

466

return ARGP_ERR_UNKNOWN;

467

}

468

p->disabled = false;

469

}

470

break;

471

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

472

plugindir = strdup(arg);

473

if(plugindir == NULL){

474

perror("strdup");

475

}

476

break;

477

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

478

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

479

break;

480

case 130: /* --userid */

442

481

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

443

482

break;

444

case 130:

483

case 131: /* --groupid */

445

484

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

446

485

break;

447

case 131:

486

case 132: /* --debug */

448

487

debug = true;

449

488

break;

450

489

case ARGP_KEY_ARG:

458

497

return 0;

459

498

}

460

499

461

plugin *plugin_list = NULL;

500

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

501

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

502

error_t parse_opt_config_file (int key, char *arg,

503

__attribute__((unused))

504

struct argp_state *state) {

505

switch (key) {

506

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

507

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

508

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

509

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

510

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

511

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

512

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

513

break;

514

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

515

argfile = strdup(arg);

516

if(argfile == NULL){

517

perror("strdup");

518

}

519

break;

520

case 130: /* --userid */

521

case 131: /* --groupid */

522

case 132: /* --debug */

523

case ARGP_KEY_ARG:

524

case ARGP_KEY_END:

525

break;

526

default:

527

return ARGP_ERR_UNKNOWN;

528

}

529

return 0;

530

}

462

531

463

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

464

.args_doc = "[+PLUS_SEPARATED_OPTIONS]",

532

struct argp argp = { .options = options,

533

.parser = parse_opt_config_file,

534

.args_doc = "",

465

535

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

466

536

467

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

537

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

538

config file location, if any. */

539

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

468

540

if (ret == ARGP_ERR_UNKNOWN){

469

541

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

470

542

exitstatus = EXIT_FAILURE;

471

543

goto fallback;

472

544

}

473

474

conffp = fopen(argfile, "r");

545

546

/* Reset to the normal argument parser */

547

argp.parser = parse_opt;

548

549

/* Open the configfile if available */

550

if (argfile == NULL){

551

conffp = fopen(AFILE, "r");

552

} else {

553

conffp = fopen(argfile, "r");

554

}

475

555

if(conffp != NULL){

476

556

char *org_line = NULL;

477

557

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

480

560

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

481

561

const char comment_delim[] = "#";

482

562

563

custom_argc = 1;

564

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

565

if(custom_argv == NULL){

566

perror("malloc");

567

exitstatus = EXIT_FAILURE;

568

goto fallback;

569

}

570

custom_argv[0] = argv[0];

571

custom_argv[1] = NULL;

572

573

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

574

commented text */

483

575

while(true){

484

576

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

485

577

if(sret == -1){

493

585

continue;

494

586

}

495

587

new_arg = strdup(p);

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

}

588

if(new_arg == NULL){

589

perror("strdup");

590

exitstatus = EXIT_FAILURE;

591

free(org_line);

592

goto fallback;

593

}

594

595

custom_argc += 1;

596

custom_argv = realloc(custom_argv, sizeof(char *)

597

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

598

if(custom_argv == NULL){

599

perror("realloc");

600

exitstatus = EXIT_FAILURE;

601

free(org_line);

602

goto fallback;

603

}

604

custom_argv[custom_argc-1] = new_arg;

605

custom_argv[custom_argc] = NULL;

502

606

}

503

607

}

504

608

free(org_line);

505

} else{

609

} else {

506

610

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

507

611

not affect opening plugins */

508

612

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

511

615

goto fallback;

512

616

}

513

617

}

514

618

/* If there was any arguments from configuration file,

619

pass them to parser as command arguments */

515

620

if(custom_argv != NULL){

516

custom_argv[0] = argv[0];

517

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

518

&plugin_list);

621

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

622

0, NULL);

519

623

if (ret == ARGP_ERR_UNKNOWN){

520

624

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

521

625

exitstatus = EXIT_FAILURE;

523

627

}

524

628

}

525

629

630

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

631

config file */

632

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

633

if (ret == ARGP_ERR_UNKNOWN){

634

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

635

exitstatus = EXIT_FAILURE;

636

goto fallback;

637

}

638

526

639

if(debug){

527

640

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

528

641

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

537

650

}

538

651

}

539

652

653

/* Strip permissions down to nobody */

540

654

ret = setuid(uid);

541

655

if (ret == -1){

542

656

perror("setuid");

543

}

544

657

}

545

658

setgid(gid);

546

659

if (ret == -1){

547

660

perror("setgid");

548

661

}

549

662

550

dir = opendir(plugindir);

663

if (plugindir == NULL){

664

dir = opendir(PDIR);

665

} else {

666

dir = opendir(plugindir);

667

}

668

551

669

if(dir == NULL){

552

670

perror("Could not open plugin dir");

553

671

exitstatus = EXIT_FAILURE;

569

687

570

688

FD_ZERO(&rfds_all);

571

689

690

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

572

691

while(true){

573

692

dirst = readdir(dir);

574

693

575

// All directory entries have been processed

694

/* All directory entries have been processed */

576

695

if(dirst == NULL){

577

696

if (errno == EBADF){

578

697

perror("readdir");

584

703

585

704

d_name_len = strlen(dirst->d_name);

586

705

587

// Ignore dotfiles, backup files and other junk

706

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

588

707

{

589

708

bool bad_name = false;

590

709

605

724

break;

606

725

}

607

726

}

608

609

727

if(bad_name){

610

728

continue;

611

729

}

612

613

730

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

614

731

size_t suf_len = strlen(*suf);

615

732

if((d_name_len >= suf_len)

642

759

free(filename);

643

760

continue;

644

761

}

645

762

763

/* Ignore non-executable files */

646

764

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

647

765

if(debug){

648

766

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

651

769

free(filename);

652

770

continue;

653

771

}

654

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

772

773

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

655

774

if(p == NULL){

656

775

perror("getplugin");

657

776

free(filename);

667

786

}

668

787

{

669

788

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

670

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

789

plugin *g = getplugin(NULL);

671

790

if(g != NULL){

672

791

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

673

792

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

676

795

}

677

796

/* Add global environment variables */

678

797

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

679

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

798

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

680

799

perror("add_environment");

681

800

}

682

801

}

687

806

process, too. */

688

807

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

689

808

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

690

char *copy = strdup(*e);

691

if(copy == NULL){

692

perror("strdup");

693

continue;

694

}

695

if(not add_environment(p, copy)){

809

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

696

810

perror("add_environment");

697

811

}

698

812

}

705

819

exitstatus = EXIT_FAILURE;

706

820

goto fallback;

707

821

}

822

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

708

823

ret = set_cloexec_flag(pipefd[0]);

709

824

if(ret < 0){

710

825

perror("set_cloexec_flag");

724

839

exitstatus = EXIT_FAILURE;

725

840

goto fallback;

726

841

}

727

// Starting a new process to be watched

842

/* Starting a new process to be watched */

728

843

pid_t pid = fork();

729

844

if(pid == -1){

730

845

perror("fork");

768

883

}

769

884

/* no return */

770

885

}

771

/* parent process */

886

/* Parent process */

887

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

772

888

free(filename);

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");

889

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

890

if (new_plugin == NULL){

891

perror("getplugin");

777

892

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

778

893

if(ret < 0){

779

perror("sigprocmask");

894

perror("sigprocmask");

780

895

}

781

896

exitstatus = EXIT_FAILURE;

782

897

goto fallback;

783

898

}

784

899

785

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

786

.fd = pipefd[0],

787

.next = process_list };

788

// List handling

789

process_list = new_process;

900

new_plugin->pid = pid;

901

new_plugin->fd = pipefd[0];

902

790

903

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

791

904

has already completed */

792

905

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

796

909

goto fallback;

797

910

}

798

911

799

FD_SET(new_process->fd, &rfds_all);

912

FD_SET(new_plugin->fd, &rfds_all);

800

913

801

if (maxfd < new_process->fd){

802

maxfd = new_process->fd;

914

if (maxfd < new_plugin->fd){

915

maxfd = new_plugin->fd;

803

916

}

804

917

805

918

}

806

919

807

free_plugin_list(plugin_list);

808

plugin_list = NULL;

809

810

920

closedir(dir);

811

921

dir = NULL;

812

813

if (process_list == NULL){

814

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

815

" directory?\n");

816

process_list = NULL;

922

923

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

924

if(p->pid != 0){

925

break;

926

}

927

if(p->next == NULL){

928

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

929

" directory?\n");

930

free_plugin_list();

931

}

817

932

}

818

while(process_list){

933

934

/* Main loop while running plugins exist */

935

while(plugin_list){

819

936

fd_set rfds = rfds_all;

820

937

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

821

938

if (select_ret == -1){

825

942

}

826

943

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

827

944

from one of them */

828

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

945

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

829

946

/* Is this process completely done? */

830

947

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

831

948

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

832

949

if(not WIFEXITED(proc->status)

833

950

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

834

951

/* Bad exit by plugin */

952

835

953

if(debug){

836

954

if(WIFEXITED(proc->status)){

837

955

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

846

964

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

847

965

}

848

966

}

967

849

968

/* Remove the plugin */

850

969

FD_CLR(proc->fd, &rfds_all);

970

851

971

/* Block signal while modifying process_list */

852

972

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

853

973

if(ret < 0){

855

975

exitstatus = EXIT_FAILURE;

856

976

goto fallback;

857

977

}

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

}

978

free_plugin(proc);

871

979

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

872

980

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

873

981

NULL);

874

982

if(ret < 0){

875

983

perror("sigprocmask");

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;

984

exitstatus = EXIT_FAILURE;

985

goto fallback;

986

}

987

988

if(plugin_list == NULL){

989

break;

990

}

991

continue;

883

992

}

993

884

994

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

885

995

886

996

bool bret = print_out_password(proc->buffer,

891

1001

}

892

1002

goto fallback;

893

1003

}

1004

894

1005

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

895

1006

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

896

1007

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

926

1037

927

1038

fallback:

928

1039

929

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

1040

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

930

1041

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

931

1042

occured */

932

1043

bool bret;

947

1058

}

948

1059

949

1060

if(custom_argv != NULL){

950

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

1061

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

951

1062

free(*arg);

952

1063

}

953

1064

free(custom_argv);

954

1065

}

955

free_plugin_list(plugin_list);

956

1066

957

1067

if(dir != NULL){

958

1068

closedir(dir);

959

1069

}

960

1070

961

1071

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

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");

1072

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

1073

if(p->pid != 0){

1074

close(p->fd);

1075

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

1076

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

1077

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

1078

perror("kill");

1079

}

969

1080

}

970

free(process_list->buffer);

971

free(process_list);

972

1081

}

973

1082

974

1083

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

978

1087

if(errno != ECHILD){

979

1088

perror("wait");

980

1089

}

1090

1091

free_plugin_list();

1092

1093

free(plugindir);

1094

free(argfile);

981

1095

982

1096

return exitstatus;

983

1097

}