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* Mandos plugin runner - Run Mandos plugins
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* Copyright © 2008-2013 Teddy Hogeborn
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* Copyright © 2008-2013 Björn Påhlsson
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* Copyright © 2008-2011 Teddy Hogeborn
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* Copyright © 2008-2011 Björn Påhlsson
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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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/* Gets an existing plugin based on name,
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or if none is found, creates a new one */
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__attribute__((warn_unused_result))
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static plugin *getplugin(char *name){
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/* Check for existing plugin with that name */
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for(plugin *p = plugin_list; p != NULL; p = p->next){
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/* Helper function for add_argument and add_environment */
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__attribute__((nonnull, warn_unused_result))
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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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char **new_array = NULL;
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new_array = realloc(*array, sizeof(char *)
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* (size_t) ((*len) + 2));
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} while(new_array == NULL and errno == EINTR);
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*array = realloc(*array, sizeof(char *)
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* (size_t) ((*len) + 2));
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} while(*array == NULL and errno == EINTR);
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/* Malloc check */
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if(new_array == NULL){
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/* Make a copy of the new string */
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/* Add to a plugin's environment */
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__attribute__((nonnull(2), warn_unused_result))
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static bool add_environment(plugin *p, const char *def, bool replace){
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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 **envdef = p->environ; *envdef != NULL; envdef++){
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if(strncmp(*envdef, def, namelen + 1) == 0){
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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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new_envdef = realloc(*envdef, strlen(def) + 1);
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} while(new_envdef == NULL and errno == EINTR);
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if(new_envdef == NULL){
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new = realloc(*e, strlen(def) + 1);
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} while(new == NULL and errno == EINTR);
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*envdef = new_envdef;
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strcpy(*envdef, def);
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* Descriptor Flags".
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| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
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__attribute__((warn_unused_result))
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static int set_cloexec_flag(int fd){
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int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
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/* If reading the flags failed, return error indication now. */
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/* Prints out a password to stdout */
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__attribute__((nonnull, warn_unused_result))
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static bool print_out_password(const char *buffer, size_t length){
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for(size_t written = 0; written < length; written += (size_t)ret){
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case 'G': /* --global-env */
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if(add_environment(getplugin(NULL), arg, true)){
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add_environment(getplugin(NULL), arg, true);
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case 'o': /* --options-for */
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if(add_environment(getplugin(arg), envdef, true)){
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add_environment(getplugin(arg), envdef, true);
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case 'd': /* --disable */
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plugin *p = getplugin(arg);
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p->disabled = false;
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case 128: /* --plugin-dir */
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plugindir = strdup(arg);
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if(plugindir != NULL){
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case 129: /* --config-file */
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/* This is already done by parse_opt_config_file() */
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case 130: /* --userid */
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tmp_id = strtoimax(arg, &tmp, 10);
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tmpmax = strtoimax(arg, &tmp, 10);
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if(errno != 0 or tmp == arg or *tmp != '\0'
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or tmp_id != (uid_t)tmp_id){
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or tmpmax != (uid_t)tmpmax){
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argp_error(state, "Bad user ID number: \"%s\", using %"
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PRIdMAX, arg, (intmax_t)uid);
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case 131: /* --groupid */
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tmp_id = strtoimax(arg, &tmp, 10);
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tmpmax = strtoimax(arg, &tmp, 10);
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if(errno != 0 or tmp == arg or *tmp != '\0'
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or tmp_id != (gid_t)tmp_id){
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or tmpmax != (gid_t)tmpmax){
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argp_error(state, "Bad group ID number: \"%s\", using %"
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PRIdMAX, arg, (intmax_t)gid);
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case 132: /* --debug */
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custom_argc += 1;
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char **new_argv = realloc(custom_argv, sizeof(char *)
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if(new_argv == NULL){
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error(0, errno, "realloc");
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exitstatus = EX_OSERR;
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custom_argv = new_argv;
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custom_argv = realloc(custom_argv, sizeof(char *)
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* ((unsigned int) custom_argc + 1));
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if(custom_argv == NULL){
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error(0, errno, "realloc");
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exitstatus = EX_OSERR;
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custom_argv[custom_argc-1] = new_arg;
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custom_argv[custom_argc] = NULL;
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bool bad_name = false;
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const char * const bad_prefixes[] = { ".", "#", NULL };
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const char const *bad_prefixes[] = { ".", "#", NULL };
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const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
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const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
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".dpkg-divert", NULL };
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wcast-qual"
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for(const char **pre = (const char **)bad_prefixes;
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*pre != NULL; pre++){
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#pragma GCC diagnostic pop
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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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if((d_name_len >= pre_len)
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and strncmp((dirst->d_name), *pre, pre_len) == 0){
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wcast-qual"
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for(const char **suf = (const char **)bad_suffixes;
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*suf != NULL; suf++){
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#pragma GCC diagnostic pop
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for(const char **suf = bad_suffixes; *suf != NULL; suf++){
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size_t suf_len = strlen(*suf);
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if((d_name_len >= suf_len)
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and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-conversion"
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FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
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-Wconversion in GNU libc
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic pop
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if(maxfd < new_plugin->fd){
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maxfd = new_plugin->fd;
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/* Remove the plugin */
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-conversion"
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FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
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-Wconversion in GNU libc
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic pop
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/* Block signal while modifying process_list */
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ret = (int)TEMP_FAILURE_RETRY(sigprocmask
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/* This process has not completed. Does it have any output? */
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wsign-conversion"
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if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
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#if defined (__GNUC__) and defined (__GLIBC__)
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#if not __GLIBC_PREREQ(2, 16)
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#pragma GCC diagnostic pop
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/* This process had nothing to say at this time */
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proc = proc->next;
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/* Before reading, make the process' data buffer large enough */
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if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
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char *new_buffer = realloc(proc->buffer, proc->buffer_size
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+ (size_t) BUFFER_SIZE);
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if(new_buffer == NULL){
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proc->buffer = realloc(proc->buffer, proc->buffer_size
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+ (size_t) BUFFER_SIZE);
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if(proc->buffer == NULL){
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error(0, errno, "malloc");
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exitstatus = EX_OSERR;
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proc->buffer = new_buffer;
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proc->buffer_size += BUFFER_SIZE;
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/* Read from the process */
added
removed
plugin-runner.c
