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plugin-runner.c
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/*
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 * Mandos plugin runner - Run Mandos plugins
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 *
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 * Copyright © 2008 Teddy Hogeborn
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 * Copyright © 2008 Björn Påhlsson
 
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 * Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
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 * 
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 * This program is free software: you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License as
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#include <stdlib.h>             /* malloc(), exit(), EXIT_FAILURE,
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                                   EXIT_SUCCESS, realloc() */
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#include <stdbool.h>            /* bool, true, false */
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#include <stdio.h>              /* perror, fileno(), fprintf(),
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                                   stderr, STDOUT_FILENO */
 
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#include <stdio.h>              /* perror, popen(), fileno(),
 
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                                   fprintf(), stderr, STDOUT_FILENO */
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#include <sys/types.h>          /* DIR, opendir(), stat(), struct
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                                   stat, waitpid(), WIFEXITED(),
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                                   WEXITSTATUS(), wait(), pid_t,
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                                   fcntl(), setuid(), setgid(),
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                                   F_GETFD, F_SETFD, FD_CLOEXEC,
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                                   access(), pipe(), fork(), close()
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                                   dup2(), STDOUT_FILENO, _exit(),
 
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                                   dup2, STDOUT_FILENO, _exit(),
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                                   execv(), write(), read(),
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                                   close() */
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#include <fcntl.h>              /* fcntl(), F_GETFD, F_SETFD,
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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 " VERSION;
 
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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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typedef struct plugin{
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      const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
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                                           ".dpkg-old",
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                                           ".dpkg-bak",
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                                           ".dpkg-divert", NULL };
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      for(const char **pre = bad_prefixes; *pre != NULL; pre++){
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        size_t pre_len = strlen(*pre);
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        perror("sigaction");
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        _exit(EXIT_FAILURE);
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      }
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      ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
 
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      ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
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      if(ret < 0){
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        perror("sigprocmask");
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        _exit(EXIT_FAILURE);
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      }
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      ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
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      if(ret == -1){
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        perror("dup2");
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    if (maxfd < new_plugin->fd){
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      maxfd = new_plugin->fd;
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    }
 
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  }
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  closedir(dir);
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  dir = NULL;
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  for(plugin *p = plugin_list; p != NULL; p = p->next){
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    if(p->pid != 0){
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      break;
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      free_plugin_list();
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    }
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  }
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  /* Main loop while running plugins exist */
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  while(plugin_list){
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    fd_set rfds = rfds_all;
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            goto fallback;
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          }
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          plugin *next_plugin = proc->next;
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          free_plugin(proc);
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          proc = next_plugin;
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          /* We are done modifying process list, so unblock signal */
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          ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
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                             NULL);
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            break;
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          }
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          plugin *next_plugin = proc->next;
 
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          free_plugin(proc);
 
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          proc = next_plugin;
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          continue;
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        }
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        /* This process exited nicely, so print its buffer */
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        bool bret = print_out_password(proc->buffer,
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                                       proc->buffer_length);
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        if(not bret){
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    perror("sigaction");
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    exitstatus = EXIT_FAILURE;
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  }
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  if(custom_argv != NULL){
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    for(char **arg = custom_argv+1; *arg != NULL; arg++){
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      free(*arg);
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    closedir(dir);
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  }
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  /* Kill the processes */
 
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  /* Free the process list and kill the processes */
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  for(plugin *p = plugin_list; p != NULL; p = p->next){
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    if(p->pid != 0){
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      close(p->fd);
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  if(errno != ECHILD){
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    perror("wait");
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  }
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  free_plugin_list();
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  free(plugindir);