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* Contact the authors at <mandos@fukt.bsnet.se>.
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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline() */
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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
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#include <stddef.h> /* size_t, NULL */
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#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
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EXIT_SUCCESS, realloc() */
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#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
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#include <string.h> /* strsep, strlen(), strcpy(),
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#include <string.h> /* strsep, strlen(), asprintf() */
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#include <errno.h> /* errno */
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#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
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/* Create a new plugin */
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plugin *new_plugin = malloc(sizeof(plugin));
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if (new_plugin == NULL){
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new_plugin->name = name;
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*new_plugin = (plugin) { .name = name,
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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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new_plugin->argv[0] = name;
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new_plugin->argv[1] = NULL;
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new_plugin->argc = 1;
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new_plugin->disabled = false;
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new_plugin->next = *plugin_list;
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new_plugin->environ = malloc(sizeof(char *));
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if(new_plugin->environ == NULL){
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free(new_plugin->argv);
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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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return new_plugin;
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static void addargument(plugin *p, char *arg){
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p->argv[p->argc] = arg;
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p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
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if (p->argv == NULL){
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p->argv[p->argc] = NULL;
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/* Helper function for add_argument and add_environment */
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static bool add_to_char_array(const char *new, char ***array,
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/* Resize the pointed-to array to hold one more pointer */
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*array = realloc(*array, sizeof(char *)
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* (size_t) ((*len) + 2));
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/* Make a copy of the new string */
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char *copy = strdup(new);
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/* Insert the copy */
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(*array)[*len] = copy;
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/* Add a new terminating NULL pointer to the last element */
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(*array)[*len] = NULL;
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/* Add to a plugin's argument vector */
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static bool add_argument(plugin *p, const char *arg){
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return add_to_char_array(arg, &(p->argv), &(p->argc));
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/* Add to a plugin's environment */
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static bool add_environment(plugin *p, const char *def){
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return add_to_char_array(def, &(p->environ), &(p->envc));
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* Based on the example in the GNU LibC manual chapter 13.13 "File
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char ** addcustomargument(char **argv, int *argc, char *arg){
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char **add_to_argv(char **argv, int *argc, char *arg){
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if (argv == NULL){
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argv = malloc(sizeof(char*) * 2);
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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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.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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.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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.doc = "Disable a specific plugin", .group = 1 },
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if(p[0] == '\0'){
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addargument(getplugin(NULL, plugins), p);
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if(not add_argument(getplugin(NULL, plugins), p)){
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perror("add_argument");
327
return ARGP_ERR_UNKNOWN;
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char *envdef = strdup(arg);
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
342
perror("add_environment");
286
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if (arg != NULL){
287
char *name = strsep(&arg, ":");
348
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
291
352
char *opt = strsep(&arg, ":");
298
359
if(p[0] == '\0'){
301
addargument(getplugin(name, plugins), p);
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
375
char *envdef = strchr(arg, ':');
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
385
perror("add_environment");
307
390
if (arg != NULL){
308
getplugin(arg, plugins)->disabled = true;
391
plugin *p = getplugin(arg, plugins);
393
return ARGP_ERR_UNKNOWN;
368
455
new_arg = strdup(p);
369
custom_argv = addcustomargument(custom_argv, &custom_argc, new_arg);
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
370
457
if (custom_argv == NULL){
371
perror("addcustomargument");
458
perror("add_to_argv");
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459
exitstatus = EXIT_FAILURE;
402
489
for(char **a = p->argv; *a != NULL; a++){
403
490
fprintf(stderr, "\tArg: %s\n", *a);
492
fprintf(stderr, "...and %u environment variables\n", p->envc);
493
for(char **a = p->environ; *a != NULL; a++){
494
fprintf(stderr, "\t%s\n", *a);
500
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
501
if (filename == NULL){
592
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
505
strcpy(filename, plugindir); /* Spurious warning */
506
strcat(filename, "/"); /* Spurious warning */
507
strcat(filename, dirst->d_name); /* Spurious warning */
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598
ret = stat(filename, &st);
524
if(getplugin(dirst->d_name, &plugin_list)->disabled){
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
526
621
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
532
plugin *p = getplugin(dirst->d_name, &plugin_list);
534
628
/* Add global arguments to argument list for this plugin */
535
629
plugin *g = getplugin(NULL, &plugin_list);
536
for(char **a = g->argv + 1; *a != NULL; a++){
631
for(char **a = g->argv + 1; *a != NULL; a++){
632
if(not add_argument(p, *a)){
633
perror("add_argument");
636
/* Add global environment variables */
637
for(char **e = g->environ; *e != NULL; e++){
638
if(not add_environment(p, *e)){
639
perror("add_environment");
644
/* If this plugin has any environment variables, we will call
645
using execve and need to duplicate the environment from this
647
if(p->environ[0] != NULL){
648
for(char **e = environ; *e != NULL; e++){
649
char *copy = strdup(*e);
654
if(not add_environment(p, copy)){
655
perror("add_environment");
541
661
ret = pipe(pipefd);
594
714
above and must now close it manually here. */
597
if(execv(filename, p->argv) < 0){
717
if(p->environ[0] == NULL){
718
if(execv(filename, p->argv) < 0){
723
if(execve(filename, p->argv, p->environ) < 0){
783
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
784
916
next = plugin_list->next;
785
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
923
free(plugin_list->environ);
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free(plugin_list);