Kembali lagi kita berkutat ke materi yang kebetulan menarik namun penting. Kemarin kita mempelajari cara membuat game tebak-tebakan menarik menggunakan IPC pipe. Hari ini saya akan menunjukkan cara menghubungkan sebuah folder agar isi dari folder tersebut dapat ditampilkan ke folder lainnya dengan menggunakan FUSE.
Tetapi sebelum itu, seperti biasa kita perlu menyiapkan beberapa hal agar segala yang saya tulis di sini menjadi bermanfaat dan tidak disia-siakan.
-pertama siapkan sebuah komputer!
-kedua siapkan OS linux apa saja dan pastikan sudah terinstall di komputer anda!
-ketiga siapkan doa kepada tuhan agar apa yang saya jelaskan di sini berhasil diimplementasikan!
Kita mulai ya, ini nih langkah mudah teman-teman untuk membuat game tebak-tebakan sederhana.
Bag I Membuat Kodingan Utama:
1. buka gedit text editor.
2. Beri nama file new.c
3. Masukkan copy and paste tulisan di bawah ini:
#define FUSE_USE_VERSION 28
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef linux
/* For pread()/pwrite()/utimensat() */
#define _XOPEN_SOURCE 500
#endif
#include <fuse.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include <sys/time.h>
#ifdef HAVE_SETXATTR
#include <sys/xattr.h>
#include <dirent.h>
#endif
static const char *dirpath = "/home/mahope/Documents/Kuliah/Sisop/Modul4";
char cbackup[100]=".bak";
int numb=0;
char lastaccess[100],lastaccessbackup[100],accessbackup[100][100];
char lastunlink[100],lastunlinkbackup[100];
FILE *fin,*from,*to,*temp;
char buffer[BUFSIZ];
size_t sizetemp;
static int xmp_getattr(const char *path, struct stat *stbuf)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = lstat(fpath, stbuf);
if (res == -1)
return -errno;
return 0;
}
static int xmp_access(const char *path, int mask)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = access(fpath, mask);
if (res == -1)
return -errno;
strcpy(lastaccess,"NULL");
strcpy(lastaccessbackup,"NULL");
return 0;
}
static int xmp_readlink(const char *path, char *buf, size_t size)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = readlink(fpath, buf, size - 1);
if (res == -1)
return -errno;
buf[res] = '\0';
return 0;
}
static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
DIR *dp;
struct dirent *de;
(void) offset;
(void) fi;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
dp = opendir(fpath);
if (dp == NULL)
return -errno;
while ((de = readdir(dp)) != NULL) {
struct stat st;
memset(&st, 0, sizeof(st));
st.st_ino = de->d_ino;
st.st_mode = de->d_type << 12;
if (filler(buf, de->d_name, &st, 0))
break;
}
closedir(dp);
return 0;
}
static int xmp_mknod(const char *path, mode_t mode, dev_t rdev)
{
int res;
/* On Linux this could just be ‘mknod(path, mode, rdev)’ but this
is more portable */
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
if (S_ISREG(mode)) {
res = open(fpath, O_CREAT | O_EXCL | O_WRONLY, mode);
if (res >= 0)
res = close(res);
}
else if (S_ISFIFO(mode))
res = mkfifo(fpath, mode);
else
res = mknod(fpath, mode, rdev);
if (res == -1)
return -errno;
//fprintf(fin,â€mknod %s\nâ€,path);
//fflush(fin);
//fclose(fin);
return 0;
}
static int xmp_mkdir(const char *path, mode_t mode)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = mkdir(fpath, mode);
if (res == -1)
return -errno;
return 0;
}
static int xmp_unlink(const char *path)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = unlink(fpath);
if (res == -1)
return -errno;
strcpy(lastunlink,fpath);
strcpy(lastunlinkbackup,fpath);
strcat(lastunlinkbackup,cbackup);
xmp_unlink(lastunlinkbackup);
return 0;
}
static int xmp_rmdir(const char *path)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = rmdir(fpath);
if (res == -1)
return -errno;
return 0;
}
static int xmp_symlink(const char *from, const char *to)
{
int res;
res = symlink(from, to);
if (res == -1)
return -errno;
return 0;
}
static int xmp_rename(const char *from, const char *to)
{
int res;
res = rename(from, to);
if (res == -1)
return -errno;
return 0;
}
static int xmp_link(const char *from, const char *to)
{
int res;
res = link(from, to);
if (res == -1)
return -errno;
return 0;
}
static int xmp_chmod(const char *path, mode_t mode)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = chmod(fpath, mode);
if (res == -1)
return -errno;
return 0;
}
static int xmp_chown(const char *path, uid_t uid, gid_t gid)
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = lchown(fpath, uid, gid);
if (res == -1)
return -errno;
return 0;
}
static int xmp_truncate(const char *path, off_t size)
//Change the size of a file
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = truncate(fpath, size);
if (res == -1)
return -errno;
return 0;
}
#ifdef HAVE_UTIMENSAT
static int xmp_utimens(const char *path, const struct timespec ts[2])
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
/* don’t use utime/utimes since they follow symlinks */
res = utimensat(0, fpath, ts, AT_SYMLINK_NOFOLLOW);
if (res == -1)
return -errno;
return 0;
}
#endif
static int xmp_open(const char *path, struct fuse_file_info *fi)
{
int res,len=strlen(lastaccess),num=0,flag=0;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
strcpy(lastaccess,fpath);
strcpy(lastaccessbackup,fpath);
strcat(lastaccessbackup,cbackup);
/*//no2
while(num<numb){
if(strcmp(lastaccessbackup,accessbackup[num])==0)flag=1;
if(flag==1){
res = open(fpath, fi->flags);
if (res == -1)
return -errno;
close(res);
return 0;
break;
}
num++;
}
if(flag==0){
strcpy(accessbackup[numb],lastaccessbackup);
numb++;
}
len=strlen(lastaccess);
if ((len >= 2) && strcmp(&(lastaccess[len - 4]), ".bak") == 0){
char command[100];
sprintf(command,"zenity --error --text='File yang anda buka adalah file backup. File tidak bisa diubah maupun disalin kembali'");
system(command);
return 1;
}
res = open(fpath, fi->flags);
if (res == -1)
return -errno;
int j=0, i=0, count=0;
int len2=strlen(path);
*/
//no1
int j=0, i=0, count=0, len2=strlen(path);
while(j<len2){
if(path[j]=='.') count=1;
if(count==1) break;
j++;
}
if(count==1&&flag==0)
while(i<=len){
if(lastaccess[i]=='.'){
if ((len >= 2) && strcmp(&(lastaccess[len - 4]), ".bak") != 0){
if(access(lastaccessbackup,F_OK)==0) remove(lastaccessbackup);
from=fopen(lastaccess,"rb");
to=fopen(lastaccessbackup,"wb");
char a;
while(1){
a=fgetc(from);
if(!feof(from))
fputc(a,to);
else break;
}
char command[100];
sprintf(command,"chmod 444 '%s'",lastaccessbackup);
system(command);
}
// fclose(from);
// fclose(to);
}
i++;
}
close(res);
return 0;
}
static int xmp_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
int fd;
int res;
(void) fi;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
fd = open(fpath, O_RDONLY);
if (fd == -1)
return -errno;
res = pread(fd, buf, size, offset);
if (res == -1)
res = -errno;
close(fd);
return res;
}
static int xmp_write(const char *path, const char *buf, size_t size,
off_t offset, struct fuse_file_info *fi)
{
int fd;
int res;
(void) fi;
while((sizetemp = fread(buffer, 1, BUFSIZ, from)))
{
fwrite(buffer, 1, sizetemp, to);
}
fclose(from);
fclose(to);
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
fd = open(fpath, O_WRONLY);
if (fd == -1)
return -errno;
res = pwrite(fd, buf, size, offset);
if (res == -1)
res = -errno;
close(fd);
return res;
}
static int xmp_statfs(const char *path, struct statvfs *stbuf)
//Get file system statistics
{
int res;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
res = statvfs(fpath, stbuf);
if (res == -1)
return -errno;
return 0;
}
static int xmp_release(const char *path, struct fuse_file_info *fi)
/*Release an open file
Release is called when there are no more references to an open file:
all file descriptors are closed and all memory mappings are unmapped.*/
{
/* Just a stub. This method is optional and can safely be left
unimplemented */
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
(void) fpath;
(void) fi;
return 0;
}
static int xmp_fsync(const char *path, int isdatasync,
//Synchronize file contents
struct fuse_file_info *fi)
{
/* Just a stub. This method is optional and can safely be left
unimplemented */
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
(void) fpath;
(void) isdatasync;
(void) fi;
return 0;
}
#ifdef HAVE_POSIX_FALLOCATE
static int xmp_fallocate(const char *path, int mode,
off_t offset, off_t length, struct fuse_file_info *fi)
//Allocates space for an open file
{
int fd;
int res;
(void) fi;
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
if (mode)
return -EOPNOTSUPP;
fd = open(fpath, O_WRONLY);
if (fd == -1)
return -errno;
res = -posix_fallocate(fd, offset, length);
close(fd);
return res;
}
#endif
#ifdef HAVE_SETXATTR
/* xattr operations are optional and can safely be left unimplemented */
static int xmp_setxattr(const char *path, const char *name, const char *value,
size_t size, int flags)
//Set extended attributes
{
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
int res = lsetxattr(fpath, name, value, size, flags);
if (res == -1)
return -errno;
return 0;
}
static int xmp_getxattr(const char *path, const char *name, char *value,
size_t size)
//Get extended attributes
{
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
int res = lgetxattr(fpath, name, value, size);
if (res == -1)
return -errno;
return res;
}
static int xmp_listxattr(const char *path, char *list, size_t size)
//List extended attributes
{
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
int res = llistxattr(fpath, list, size);
if (res == -1)
return -errno;
return res;
}
static int xmp_removexattr(const char *path, const char *name)
{
char fpath[1000];
sprintf(fpath,"%s%s",dirpath,path);
int res = lremovexattr(fpath, name);
if (res == -1)
return -errno;
return 0;
}
#endif /* HAVE_SETXATTR */
static struct fuse_operations xmp_oper = {
.getattr = xmp_getattr,
.access = xmp_access,
.readlink = xmp_readlink,
.readdir = xmp_readdir,
.mknod = xmp_mknod,
.mkdir = xmp_mkdir,
.symlink = xmp_symlink,
.unlink = xmp_unlink,
.rmdir = xmp_rmdir,
.rename = xmp_rename,
.link = xmp_link,
.chmod = xmp_chmod,
.chown = xmp_chown,
.truncate = xmp_truncate,
#ifdef HAVE_UTIMENSAT
.utimens = xmp_utimens,
#endif
.open = xmp_open,
.read = xmp_read,
.write = xmp_write,
.statfs = xmp_statfs,
.release = xmp_release,
.fsync = xmp_fsync,
#ifdef HAVE_POSIX_FALLOCATE
.fallocate = xmp_fallocate,
#endif
#ifdef HAVE_SETXATTR
.setxattr = xmp_setxattr,
.getxattr = xmp_getxattr,
.listxattr = xmp_listxattr,
.removexattr = xmp_removexattr,
#endif
};
int main(int argc, char *argv[])
{
umask(0);
return fuse_main(argc, argv, &xmp_oper, NULL);
}
Menjalankan Program:
1. Buka bagian terminal pada os linux anda. Dengan cara pada tombol home ketik "terminal" tanpa tanda baca.
2. Ketik gcc -Wall new.c `pkg-config fuse --cflags --libs` -o new.
3. Kemudian ketik ./new /tmp/fuse.
Saya akan menjelaskan apa yang akan dilakukan oleh program ini:
-program ini akan mengakibatkan ketika kita membuka folder fuse, kita akan langsiung di direct ke folder modul4
-setiap file (contoh:apa.c) yang di buka pada folder modul4 akan memunculkan file bernama sama namun memiliki tambahan akhiran .bak (contoh:apa.c.bak)
-file .bak ini tidak bisa dibuka, dan bila dipaksakan di buka makan akan muncul pesan error.
Selamat Bermain!!!
