/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
gcc -Wall hello.c `pkg-config fuse --cflags --libs` -o hello
*/
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <jni.h>
#include <pthread.h>
static const char *peter_str = "Hello World!\n";
static const char *peter_path = "/hello";
pthread_mutex_t mutex1;
static jclass cls;
jmethodID readdir;
static JNIEnv *env;
static JavaVM *jvm;
void create_vm() {
//JNIEnv *env;
JavaVMInitArgs vm_args;
JavaVMOption options;
options.optionString =
"-Djava.class.path=../target/PFSBuilder-20140619.jar";
vm_args.version = JNI_VERSION_1_6;
vm_args.nOptions = 1;
vm_args.options = &options;
vm_args.ignoreUnrecognized = 0;
JNI_CreateJavaVM(&jvm, (void**) &env, &vm_args);
return env;
}
static int peter_getattr(const char *path, struct stat *stbuf) {
printf("--------------- peter_getattr = %s\n", path);
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (strcmp(path, "/") == 0) {
printf("--------------- root /\n");
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else if (strcmp(path, peter_path) == 0) {
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = strlen(peter_str);
} else
res = -ENOENT;
return res;
}
static int peter_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi) {
printf("--------------- peter_readdir = %s\n", path);
(void) offset;
(void) fi;
if (strcmp(path, "/") != 0)
return -ENOENT;
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
filler(buf, peter_path + 1, NULL, 0);
pthread_mutex_lock(&mutex1);
jstring paraReadDir = (*env)->NewStringUTF(env, "Peter cheung");
(*env)->CallStaticVoidMethod(env, cls, readdir, paraReadDir);
pthread_mutex_unlock(&mutex1);
return 0;
}
static int peter_open(const char *path, struct fuse_file_info *fi) {
printf("--------------- peter_open = %s\n", path);
if (strcmp(path, peter_path) != 0)
return -ENOENT;
if ((fi->flags & 3) != O_RDONLY)
return -EACCES;
return 0;
}
static int peter_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi) {
printf("--------------- peter_read = %s\n", path);
size_t len;
(void) fi;
if (strcmp(path, peter_path) != 0)
return -ENOENT;
len = strlen(peter_str);
if (offset < len) {
if (offset + size > len)
size = len - offset;
memcpy(buf, peter_str + offset, size);
} else
size = 0;
return size;
}
static struct fuse_operations peter_oper = { .getattr = peter_getattr,
.readdir = peter_readdir, .open = peter_open, .read = peter_read, };
int main(int argc, char *argv[]) {
create_vm();
printf("s2\n");
cls = (*env)->FindClass(env, "com/pfsbuilder/fuse/FuseStub");
printf("s4\n");
if (cls == 0) {
printf("load class error\n");
exit(-1);
}
printf("s4\n");
readdir = (*env)->GetStaticMethodID(env, cls, "readdir",
"(Ljava/lang/String;)V");
if (readdir == 0) {
printf("load readdir error\n");
exit(-1);
}
jstring paraReadDir = (*env)->NewStringUTF(env, "Peter cheung");
(*env)->CallStaticVoidMethod(env, cls, readdir, paraReadDir);
printf(
"+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\n");
pthread_mutex_init(&mutex1, NULL);
return fuse_main(argc, argv, &peter_oper, NULL);
}
Post Views: 3,304
One Response
need these two things to me it works
1) fuse_get_context
2) (*userdata->jvm)->AttachCurrentThreadAsDaemon(userdata->jvm, (void**)&userdata->env, NULL);