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#include <signal.h> /* struct sigaction, sigemptyset(),
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sigaddset(), sigaction(),
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sigprocmask(), SIG_BLOCK, SIGCHLD,
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SIG_UNBLOCK, kill(), sig_atomic_t
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SIG_UNBLOCK, kill() */
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#include <errno.h> /* errno, EBADF */
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#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
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#define BUFFER_SIZE 256
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if(name != NULL){
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copy_name = strdup(name);
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if(copy_name == NULL){
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*new_plugin = (plugin){ .name = copy_name,
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.next = plugin_list };
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*new_plugin = (plugin) { .name = copy_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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error_t parse_opt(int key, char *arg, __attribute__((unused))
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struct argp_state *state){
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struct argp_state *state) {
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case 'g': /* --global-options */
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while((plugin_option = strsep(&arg, ",")) != NULL){
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if(plugin_option[0] == '\0'){
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while((p = strsep(&arg, ",")) != NULL){
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if(not add_argument(getplugin(NULL), plugin_option)){
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if(not add_argument(getplugin(NULL), p)){
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perror("add_argument");
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return ARGP_ERR_UNKNOWN;
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case 'o': /* --options-for */
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char *plugin_name = strsep(&arg, ":");
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if(plugin_name[0] == '\0'){
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while((plugin_option = strsep(&arg, ",")) != NULL){
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if(not add_argument(getplugin(plugin_name), plugin_option)){
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char *p_name = strsep(&arg, ":");
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if(p_name[0] == '\0' or arg == NULL){
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char *opt = strsep(&arg, ":");
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if(opt[0] == '\0' or opt == NULL){
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while((p = strsep(&opt, ",")) != NULL){
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if(not add_argument(getplugin(p_name), p)){
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perror("add_argument");
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return ARGP_ERR_UNKNOWN;
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/* This is already done by parse_opt_config_file() */
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case 130: /* --userid */
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ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
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if(ret < 1 or tmpmax != (uid_t)tmpmax
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or arg[numchars] != '\0'){
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fprintf(stderr, "Bad user ID number: \"%s\", using %"
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PRIdMAX "\n", arg, (intmax_t)uid);
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/* In the GNU C library, uid_t is always unsigned int */
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ret = sscanf(arg, "%u", &uid);
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fprintf(stderr, "Bad user ID number: \"%s\", using %u\n", arg,
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case 131: /* --groupid */
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ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
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if(ret < 1 or tmpmax != (gid_t)tmpmax
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or arg[numchars] != '\0'){
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fprintf(stderr, "Bad group ID number: \"%s\", using %"
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PRIdMAX "\n", arg, (intmax_t)gid);
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/* In the GNU C library, gid_t is always unsigned int */
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ret = sscanf(arg, "%u", &gid);
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fprintf(stderr, "Bad group ID number: \"%s\", using %u\n",
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case 132: /* --debug */
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ignores everything but the --config-file option. */
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error_t parse_opt_config_file(int key, char *arg,
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__attribute__((unused))
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struct argp_state *state){
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struct argp_state *state) {
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case 'g': /* --global-options */
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case 'G': /* --global-env */
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case 'o': /* --options-for */
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for(char **a = p->argv; *a != NULL; a++){
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fprintf(stderr, "\tArg: %s\n", *a);
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fprintf(stderr, "...and %d environment variables\n", p->envc);
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fprintf(stderr, "...and %u environment variables\n", p->envc);
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for(char **a = p->environ; *a != NULL; a++){
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fprintf(stderr, "\t%s\n", *a);
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from one of them */
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for(plugin *proc = plugin_list; proc != NULL;){
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/* Is this process completely done? */
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if(proc->completed and proc->eof){
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if(proc->eof and proc->completed){
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/* Only accept the plugin output if it exited cleanly */
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if(not WIFEXITED(proc->status)
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or WEXITSTATUS(proc->status) != 0){
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if(WIFEXITED(proc->status)){
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fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
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" status %d\n", proc->name,
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(intmax_t) (proc->pid),
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fprintf(stderr, "Plugin %u exited with status %d\n",
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(unsigned int) (proc->pid),
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WEXITSTATUS(proc->status));
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} else if(WIFSIGNALED(proc->status)){
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fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
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" signal %d\n", proc->name,
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(intmax_t) (proc->pid),
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} else if(WIFSIGNALED(proc->status)) {
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fprintf(stderr, "Plugin %u killed by signal %d\n",
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(unsigned int) (proc->pid),
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WTERMSIG(proc->status));
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} else if(WCOREDUMP(proc->status)){
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fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
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" core\n", proc->name, (intmax_t) (proc->pid));
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fprintf(stderr, "Plugin %u dumped core\n",
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(unsigned int) (proc->pid));