pid_t acquire(char *plugin_name, char *plugin_filename)
{
/* continue in background */
pid_t child = fork();
if (child)
return child;
setenvvars_munin();
setenvvars_conf(plugin_name);
/* ask the plugin not to fork */
putenv("no_fork=1");
/* Go underwater */
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
execl(plugin_filename, plugin_name, "acquire", NULL);
/* should nevec come here */
exit(2);
}
static int handle_connection() {
char line[LINE_MAX];
/* Prepare per connection plugin env vars */
setenvvars_munin();
printf("# munin node at %s\n", host);
while (fflush(stdout), fgets(line, LINE_MAX, stdin) != NULL) {
char* cmd;
char* arg;
cmd = strtok(line, " \t\n\r");
if(cmd == NULL)
arg = NULL;
else
arg = strtok(NULL, " \t\n\r");
if (!cmd || strlen(cmd) == 0) {
printf("# empty cmd\n");
} else if (strcmp(cmd, "version") == 0) {
printf("munin c node version: %s\n", VERSION);
} else if (strcmp(cmd, "nodes") == 0) {
printf("%s\n", host);
printf(".\n");
} else if (strcmp(cmd, "quit") == 0) {
return(0);
} else if (strcmp(cmd, "list") == 0) {
DIR* dirp = opendir(plugin_dir);
if (dirp == NULL) {
printf("# Cannot open plugin dir\n");
return(0);
}
{
struct dirent* dp;
while ((dp = readdir(dirp)) != NULL) {
char cmdline[LINE_MAX];
char* plugin_filename = dp->d_name;;
if (plugin_filename[0] == '.') {
/* No dotted plugin */
continue;
}
snprintf(cmdline, LINE_MAX, "%s/%s", plugin_dir, plugin_filename);
if (access(cmdline, X_OK) == 0) {
if(extension_stripping) {
/* Strip after the last . */
char *last_dot_idx = strrchr(plugin_filename, '.');
if (last_dot_idx != NULL) {
*last_dot_idx = '\0';
}
}
printf("%s ", plugin_filename);
}
}
closedir(dirp);
}
putchar('\n');
} else if (
strcmp(cmd, "config") == 0 ||
strcmp(cmd, "fetch") == 0
) {
char cmdline[LINE_MAX];
char *argv[2] = { 0, };
pid_t pid;
if(arg == NULL) {
printf("# no plugin given\n");
continue;
}
if(arg[0] == '.' || strchr(arg, '/') != NULL) {
printf("# invalid plugin character\n");
continue;
}
if (! extension_stripping || find_plugin_with_basename(cmdline, plugin_dir, arg) == 0) {
/* extension_stripping failed, using the plain method */
snprintf(cmdline, LINE_MAX, "%s/%s", plugin_dir, arg);
}
if (access(cmdline, X_OK) == -1) {
printf("# unknown plugin: %s\n", arg);
continue;
}
/* Now is the time to set environnement */
setenvvars_conf(arg);
argv[0] = arg;
/* Using posix_spawnp() here instead of fork() since we will
* do a little more than a mere exec --> setenvvars_conf() */
if (0 == posix_spawn(&pid, cmdline,
NULL, /* const posix_spawn_file_actions_t *file_actions, */
NULL, /* const posix_spawnattr_t *restrict attrp, */
argv, environ)) {
/* Wait for completion */
waitpid(pid, NULL, 0);
} else {
printf("# fork failed\n");
continue;
}
printf(".\n");
} else if (strcmp(cmd, "cap") == 0) {
printf("cap ");
if ('\0' != *spoolfetch_dir) {
printf("spool ");
}
printf("\n");
} else if (strcmp(cmd, "spoolfetch") == 0) {
printf("# not implem yet cmd: %s\n", cmd);
} else {
printf("# Unknown cmd: %s. Try cap, list, nodes, config, fetch, version or quit\n", cmd);
}
}
return 0;
}