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- Committer: Björn Påhlsson
- Date: 2008-07-21 19:15:06 UTC
- mfrom: (19 mandos)
- mto: This revision was merged to the branch mainline in revision 22.
- Revision ID: belorn@braxen-20080721191506-f4av11wlu2cmmeid
merge
- files removed:
- server.conf
- files renamed:
- clients.conf => mandos-clients.conf
- files modified:
- Makefile
added
removed
plugbasedclient.c
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/* -*- coding: utf-8 -*- */
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/*
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* Mandos plugin runner - Run Mandos plugins
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*
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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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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Contact the authors at <mandos@fukt.bsnet.se>.
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*/
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1
#include <stdio.h> /* popen, fileno */
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#include <iso646.h> /* and, or, not */
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#include <sys/types.h> /* DIR, opendir, stat, struct stat, waitpid,
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#include <sys/stat.h> /* stat, struct stat */
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#include <unistd.h> /* stat, struct stat, chdir */
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#include <stdlib.h> /* EXIT_FAILURE */
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#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET,
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FD_ISSET */
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#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET, FD_ISSET */
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#include <string.h> /* strlen, strcpy, strcat */
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#include <stdbool.h> /* true */
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#include <sys/wait.h> /* waitpid, WIFEXITED, WEXITSTATUS */
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#include <errno.h> /* errno */
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#include <argp.h> /* argp */
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struct process;
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pid_t pid;
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int fd;
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char *buffer;
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size_t buffer_size;
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size_t buffer_length;
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int buffer_size;
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int buffer_length;
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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 "global" and any plugin name */
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char **argv;
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int argc;
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bool disable;
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struct plugin *next;
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} plugin;
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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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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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}
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}
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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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perror("malloc");
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exit(EXIT_FAILURE);
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}
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new_plugin->name = name;
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new_plugin->argv = malloc(sizeof(char *) * 2);
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if (new_plugin->argv == NULL){
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perror("malloc");
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exit(EXIT_FAILURE);
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}
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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->disable = false;
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new_plugin->next = *plugin_list;
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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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}
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void addarguments(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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perror("malloc");
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exit(EXIT_FAILURE);
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}
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p->argc++;
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p->argv[p->argc] = NULL;
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}
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#define BUFFER_SIZE 256
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const char *argp_program_version =
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"plugbasedclient 0.9";
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const char *argp_program_bug_address =
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"<mandos@fukt.bsnet.se>";
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static char doc[] =
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"Mandos plugin runner -- Run Mandos plugins";
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/* A description of the arguments we accept. */
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static char args_doc[] = "";
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int main(int argc, char *argv[]){
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const char *plugindir = "plugins.d";
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size_t d_name_len;
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char plugindir[] = "plugins.d";
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size_t d_name_len, plugindir_len = sizeof(plugindir)-1;
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DIR *dir;
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struct dirent *dirst;
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struct stat st;
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fd_set rfds_orig;
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int ret, maxfd = 0;
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process *process_list = NULL;
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/* The options we understand. */
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struct argp_option options[] = {
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{ .name = "global-options", .key = 'g',
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.arg = "option[,option[,...]]", .flags = 0,
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.doc = "Options effecting all plugins" },
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{ .name = "options-for", .key = 'o',
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.arg = "plugin:option[,option[,...]]", .flags = 0,
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.doc = "Options effecting only specified plugins" },
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{ .name = "disable-plugin", .key = 'd',
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.arg = "Plugin[,Plugin[,...]]", .flags = 0,
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.doc = "Option to disable specififed plugins" },
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{ .name = "plugin-dir", .key = 128,
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.arg = "Directory", .flags = 0,
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.doc = "Option to change directory to search for plugins" },
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{ .name = NULL }
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};
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error_t parse_opt (int key, char *arg, struct argp_state *state) {
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/* Get the INPUT argument from `argp_parse', which we
140
know is a pointer to our arguments structure. */
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plugin **plugins = state->input;
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switch (key) {
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case 'g':
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if (arg != NULL){
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char *p = strtok(arg, ",");
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do{
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addarguments(getplugin(NULL, plugins), p);
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p = strtok(NULL, ",");
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} while (p);
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}
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break;
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case 'o':
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if (arg != NULL){
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char *name = strtok(arg, ":");
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char *p = strtok(NULL, ":");
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p = strtok(p, ",");
157
do{
158
addarguments(getplugin(name, plugins), p);
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p = strtok(NULL, ",");
160
} while (p);
161
}
162
break;
163
case 'd':
164
if (arg != NULL){
165
char *p = strtok(arg, ",");
166
do{
167
getplugin(p, plugins)->disable = true;
168
p = strtok(NULL, ",");
169
} while (p);
170
}
171
break;
172
case 128:
173
plugindir = arg;
174
break;
175
case ARGP_KEY_ARG:
176
argp_usage (state);
177
break;
178
case ARGP_KEY_END:
179
break;
180
default:
181
return ARGP_ERR_UNKNOWN;
182
}
183
return 0;
184
}
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186
plugin *plugin_list = NULL;
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188
struct argp argp = { .options = options, .parser = parse_opt,
189
.args_doc = args_doc, .doc = doc };
190
191
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
192
193
/* for(plugin *p = plugin_list; p != NULL; p=p->next){ */
194
/* fprintf(stderr, "Plugin: %s has %d arguments\n", p->name ? p->name : "Global", p->argc); */
195
/* for(char **a = p->argv + 1; *a != NULL; a++){ */
196
/* fprintf(stderr, "\tArg: %s\n", *a); */
197
/* } */
198
/* } */
199
200
/* return 0; */
201
38
202
39
dir = opendir(plugindir);
203
40
204
41
if(dir == NULL){
205
42
fprintf(stderr, "Can not open directory\n");
206
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return EXIT_FAILURE;
224
61
continue;
225
62
}
226
63
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char *filename = malloc(d_name_len + strlen(plugindir) + 2);
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char *filename = malloc(d_name_len + plugindir_len + 2);
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strcpy(filename, plugindir);
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strcat(filename, "/");
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strcat(filename, dirst->d_name);
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stat(filename, &st);
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if (S_ISREG(st.st_mode)
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and (access(filename, X_OK) == 0)
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and not (getplugin(dirst->d_name, &plugin_list)->disable)){
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if (S_ISREG(st.st_mode) and (access(filename, X_OK) == 0)){
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// Starting a new process to be watched
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process *new_process = malloc(sizeof(process));
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int pipefd[2];
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ret = pipe(pipefd);
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if (ret == -1){
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perror(argv[0]);
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goto end;
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}
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int pipefd[2];
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pipe(pipefd);
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new_process->pid = fork();
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if(new_process->pid == 0){
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/* this is the child process */
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closedir(dir);
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close(pipefd[0]); /* close unused read end of pipe */
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81
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
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plugin *p = getplugin(dirst->d_name, &plugin_list);
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plugin *g = getplugin(NULL, &plugin_list);
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for(char **a = g->argv + 1; *a != NULL; a++){
255
addarguments(p, *a);
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/* create a new modified argument list */
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char **new_argv = malloc(sizeof(char *) * (argc + 1));
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new_argv[0] = filename;
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for(int i = 1; i < argc; i++){
86
new_argv[i] = argv[i];
256
87
}
257
if(execv(filename, p->argv) < 0){
88
new_argv[argc] = NULL;
89
if(execv(filename, new_argv) < 0){
258
90
perror(argv[0]);
259
91
close(pipefd[1]);
260
92
exit(EXIT_FAILURE);
299
131
> process_itr->buffer_size){
300
132
process_itr->buffer = realloc(process_itr->buffer,
301
133
process_itr->buffer_size
302
+ (size_t) BUFFER_SIZE);
134
+ BUFFER_SIZE);
303
135
if (process_itr->buffer == NULL){
304
136
perror(argv[0]);
305
137
goto end;
308
140
}
309
141
ret = read(process_itr->fd, process_itr->buffer
310
142
+ process_itr->buffer_length, BUFFER_SIZE);
311
if(ret < 0){
312
/* Read error from this process; ignore it */
313
continue;
314
}
315
process_itr->buffer_length += (size_t) ret;
143
process_itr->buffer_length+=ret;
316
144
if(ret == 0){
317
145
/* got EOF */
318
146
/* wait for process exit */
319
147
int status;
320
148
waitpid(process_itr->pid, &status, 0);
321
149
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
322
for(size_t written = 0;
323
written < process_itr->buffer_length;){
324
ret = write(STDOUT_FILENO,
325
process_itr->buffer + written,
326
process_itr->buffer_length - written);
327
if(ret < 0){
328
perror(argv[0]);
329
goto end;
330
}
331
written += (size_t)ret;
332
}
150
write(STDOUT_FILENO, process_itr->buffer,
151
process_itr->buffer_length);
333
152
goto end;
334
153
} else {
335
154
FD_CLR(process_itr->fd, &rfds_orig);
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