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trusterdBoot.c
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trusterdBoot.c
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#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#ifdef __APPLE__
#include <unistd.h>
#include <libproc.h>
#include <sys/event.h>
#include <sys/time.h>
#include <fcntl.h>
#include <errno.h>
#endif
#ifdef __linux
#include <sys/wait.h>
#endif
#include "mruby.h"
#include "mruby/proc.h"
#include "mruby/compile.h"
#include "mruby/string.h"
typedef int (*FUNCPTR)(char *script);
FUNCPTR gcb;
char trusterd_conf_path[1024];
FILE *confFile = NULL;
extern const uint8_t commonUtil[];
#ifdef __linux
extern const uint8_t watchFileLinux[];
#endif
#ifdef __APPLE__
extern const uint8_t checkFile[];
#endif
void setTrusterdConfPath(const char *filepath)
{
strncpy(trusterd_conf_path, filepath, 1023);
trusterd_conf_path[1023] = '\0';
}
char *getTrusterdConfPath()
{
return trusterd_conf_path;
}
void setCallback(FUNCPTR cb)
{
gcb = cb;
}
FUNCPTR getCallback()
{
return gcb;
}
/*
static mrb_value runTrusterd(mrb_state *mrb, mrb_value obj)
{
FILE *f;
char *filepath;
printf("start runTrusterd\n");
fflush(stdout);
filepath = getTrusterdConfPath();
f = fopen(filepath, "r");
mrb_load_file(mrb, f);
fclose(f);
return mrb_nil_value();
}
*/
static mrb_value dofork(mrb_state *mrb, const char *filepath)
{
mrb_value val;
struct RClass *libtrd;
/*
struct RProc *blk;
mrb_value val, proc;
printf("start dofork\n");
setTrusterdConfPath(filepath);
printf("trusterdconfpath = %s\n",getTrusterdConfPath());
blk = mrb_proc_new_cfunc(mrb, runTrusterd);
proc = mrb_obj_value(blk);
val = mrb_funcall_with_block(mrb, mrb_obj_value(mrb_module_get(mrb, "Process")), mrb_intern(mrb, "fork"), 0, NULL, proc);
*/
//printf("start dofork\n");
int pid;
switch (pid = fork()) {
case 0:
// start trusterd
//printf("trusterd[%s] is starting...\n", filepath);
libtrd = mrb_module_get(mrb, "Libtrusterd");
val = mrb_funcall(mrb,mrb_obj_value(mrb_class_get_under(mrb, libtrd, "Util")),"set_sigterm", 0, NULL);
if (confFile != NULL) {
fclose(confFile);
}
confFile = fopen(filepath, "r");
if (confFile == NULL) {
printf("oops fopen[%s]!\n", filepath);
perror("fopen");
}
mrb_load_file(mrb, confFile);
fclose(confFile);
confFile = NULL;
_exit(0);
return mrb_fixnum_value(0);
case -1:
perror("fork fail");
return mrb_fixnum_value(-1);
default:
//printf("trusterd has started.");
return mrb_fixnum_value(pid);
}
//printf("end dofork\n");
return val;
}
mrb_value reload(mrb_state *mrb, mrb_value pid, const char *filepath)
{
//mrb_value val;
int status;
// kill pid
//printf("kill pid = %d\n", mrb_fixnum(pid));
//val = mrb_funcall(mrb, mrb_obj_value(mrb_module_get(mrb, "Process")), "kill", 2, mrb_fixnum_value(9), pid);
//mrb_funcall(mrb,mrb_obj_value(mrb_module_get(mrb, "Process")),"waitpid",1,val);
kill(mrb_fixnum(pid), SIGTERM);
waitpid(mrb_fixnum(pid), &status, 0);
return dofork(mrb, filepath);
}
#ifdef __linux
int watchTrusterdConfFileInotify(mrb_state *mrb, char *filepath)
{
mrb_value val;
mrb_load_irep(mrb, watchFileLinux);
val = mrb_funcall(mrb, mrb_top_self(mrb), "watchFileLinux", 1,
mrb_str_new_cstr(mrb, filepath));
if(val.value.p == NULL) {
printf("mrb_val is null\n");
return 0;
}
printf("type %d\n",val.tt);
if(val.tt == MRB_TT_EXCEPTION) {
printf("now we've got exception\n");
return 0;
}
//fflush(stdout);
//printf("watchFileLinux is end[%d].\n",mrb_fixnum(val));
//mrb_funcall(mrb, mrb_top_self(mrb), "p", 1, val);
//fflush(stdout);
return mrb_fixnum(val);
}
#endif
#ifdef __APPLE__
mrb_value get_procpathname(mrb_state* mrb, mrb_value self)
{
int ret;
pid_t pid;
char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
pid = getpid();
ret = proc_pidpath(pid, pathbuf, sizeof(pathbuf));
return mrb_str_new(mrb, pathbuf, strlen(pathbuf));
}
int checkFileCall(mrb_state *mrb, const char *filepath)
{
mrb_value val;
val = mrb_funcall(mrb, mrb_top_self(mrb), "checkFile", 1,
mrb_str_new_cstr(mrb, filepath));
return mrb_bool(val);
}
const char *getFullpath(mrb_state *mrb, char *filepath)
{
mrb_value val;
// TODO we need handle file error when we not found the file.
// we need filepath to absolute path.
val = mrb_funcall(mrb, mrb_obj_value(mrb_class_get(mrb, "File")), "realpath", 1,
mrb_str_new_cstr(mrb, filepath));
return mrb_string_value_ptr(mrb, val);
}
const char *getDirname(mrb_state *mrb, const char *fullpath)
{
mrb_value val;
val = mrb_funcall(mrb, mrb_obj_value(mrb_class_get(mrb, "File")), "dirname", 1,
mrb_str_new_cstr(mrb, fullpath));
return mrb_string_value_ptr(mrb, val);
}
int watchTrusterdConfFileKqueue(mrb_state *mrb, char *filepath)
{
int fd, dfd, kq;
struct kevent kev[2], kev_r;
int isFileWatching;
const char *dirpath;
const char *fullpath;
mrb_value pid;
struct RClass *libtrd;
mrb_value val;
mrb_load_irep(mrb, checkFile);
libtrd = mrb_module_get(mrb, "Libtrusterd");
printf("Util.write_pid before\n");
val = mrb_funcall(mrb, mrb_obj_value(mrb_class_get_under(mrb, libtrd, "Util")),"write_pid", 0, NULL);
printf("Util.write_pid after\n");
mrb_funcall(mrb, mrb_top_self(mrb), "p", 1, val);
fullpath = getFullpath(mrb, filepath);
if (fullpath == NULL) {
return -1;
}
//printf("%s\n", fullpath);
fd = open(fullpath, O_RDONLY);
if(fd<0) {
return -1;
}
dirpath = getDirname(mrb, fullpath);
dfd = open(dirpath, O_RDONLY);
val = mrb_funcall(mrb,mrb_obj_value(mrb_class_get_under(mrb, libtrd, "Util")),"set_sigterm", 0, NULL);
mrb_funcall(mrb, mrb_top_self(mrb), "p", 1, val);
if(mrb->exc) {
printf("Oops something went wrong.\n");
}
// まず起動する
pid = dofork(mrb, fullpath);
kq = kqueue();
EV_SET(&kev[0], fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, NOTE_DELETE | NOTE_WRITE, 0, NULL);
EV_SET(&kev[1], dfd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, NOTE_WRITE, 0, NULL);
if (kevent(kq, kev, 2, NULL, 0, NULL) == -1) {
perror("kevent error");
//exit(0);
return -1;
}
isFileWatching = 1;
while (1) {
if (isFileWatching) {
// ディレクトリとファイルを監視
if (kevent(kq, kev, 2, &kev_r, 1, NULL) == -1) {
printf("errno = %d\n", errno);
perror("kevent_r error\n");
if(errno == EINTR) {
return 0;
}
//exit(0);
}
} else {
// ディレクトリのみ監視
if (kevent(kq, &kev[1], 1, &kev_r, 1, NULL) == -1) {
perror("kevent_r error\n");
exit(0);
}
}
if (isFileWatching == 1) {
if (kev_r.ident == fd) {
if (kev_r.fflags & NOTE_WRITE) {
printf("file was updated!\n");
close(fd);
fd = open(fullpath, O_RDONLY);
EV_SET(&kev[0], fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, NOTE_DELETE | NOTE_WRITE, 0, NULL);
pid = reload(mrb, pid, fullpath);
} else if (kev_r.fflags & NOTE_DELETE) {
printf("file was deleted!\n");
close(fd);
isFileWatching = 0;
}
}
} else {
if (kev_r.fflags & NOTE_WRITE) {
printf("%s\n", "update dir");
if (checkFileCall(mrb, fullpath) == 1) {
printf("%s\n", "add file!");
// チェック対象だったら、fdを再取得して、これを監視対象にする。
fd = open(fullpath, O_RDONLY);
EV_SET(&kev[0], fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR, NOTE_DELETE | NOTE_WRITE, 0, NULL);
pid = reload(mrb, pid, fullpath);
isFileWatching = 1;
}
}
}
}
return 0;
}
#endif // end __APPLE__
mrb_value exec(mrb_state* mrb, mrb_value self)
{
char *script;
printf("class:Call, method:py_exec\n");
// 第一引数を引数にコールバック関数を実行する。
mrb_get_args(mrb, "z", &script);
(*getCallback())(script);
return self;
}
void mrbAddMyCallBack(mrb_state* mrb, FUNCPTR cb)
{
setCallback(cb);
struct RClass *hoge_module;
hoge_module = mrb_define_module(mrb, "MyCall");
// クラスを定義する
// クラスメソッドを定義する
mrb_define_class_method(mrb, hoge_module, "my_exec", exec, MRB_ARGS_REQ(1));
#ifdef __APPLE__
mrb_define_class_method(mrb, hoge_module, "procpathname", get_procpathname, MRB_ARGS_NONE());
#endif
}
int watchTrusterdConfFile(mrb_state *mrb, char *filepath)
{
#ifdef __APPLE__
return watchTrusterdConfFileKqueue(mrb, filepath);
#endif
#ifdef __linux
return watchTrusterdConfFileInotify(mrb, filepath);
#endif
return -1;
}
int boot_from_file_path(char *filepath, FUNCPTR cb)
{
int rtn;
assert(filepath != NULL);
mrb_state* mrb = mrb_open();
mrb_load_irep(mrb, commonUtil);
mrbAddMyCallBack(mrb, cb);
rtn = watchTrusterdConfFile(mrb, filepath);
//mrb_load_string(mrb, name);
mrb_close(mrb);
//printf("we now return[%d]\n",rtn);
return rtn;
}
int boot(char *name, FUNCPTR cb)
{
assert(name != NULL);
mrb_state* mrb = mrb_open();
// のようにmrubyから呼び出し元の言語でコードを渡すことで、
// 呼び出し元でコードを評価してもらう。
mrbAddMyCallBack(mrb, cb);
mrb_load_string(mrb, name);
mrb_close(mrb);
return printf("%s", name);
}