A minimal working FUSE filesystem

gistfile1.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fuse.h>

// Synopsis:
// gcc fuse_minimal.c -D_FILE_OFFSET_BITS=64 -DFUSE_USE_VERSION=26 `pkg-config --cflags --libs fuse` -o fuse_minimal
// ./fuse_minimal -f /mnt/fuse_minimal

int fuse_getattr(const char *path, struct stat *statbuf);
int fuse_opendir(const char *path, struct fuse_file_info *fi);
int fuse_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset,
	       struct fuse_file_info *fi);

struct fuse_operations fuse_oper = {
  .getattr = fuse_getattr,
  .opendir = fuse_opendir,
  .readdir = fuse_readdir,
};

int fuse_getattr(const char *path, struct stat *statbuf)
{
    printf("getattr path=%s\n", path);
    memset(statbuf, 0, sizeof(statbuf));
    statbuf->st_dev = 2049;
    statbuf->st_ino = 14450705;
    statbuf->st_mode = 040775;
    statbuf->st_nlink = 2;
    statbuf->st_uid = 1000;
    statbuf->st_gid = 1000;
    statbuf->st_rdev = 0;
    statbuf->st_size = 4096;
    statbuf->st_blksize = 4096;
    statbuf->st_blocks = 8;
    time(&(statbuf->st_atime));
    time(&(statbuf->st_mtime));
    time(&(statbuf->st_ctime));
    return(0);
}

int fuse_opendir(const char *path, struct fuse_file_info *fi)
{
    printf("opendir path=%s\n", path);
    return(0);
}


int fuse_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset,
	       struct fuse_file_info *fi)
{
    printf("readdir path=%s\n", path);
    filler(buf, "11", NULL, 0);
}

int main(int argc, char *argv[])
{
    if(argc < 2) {
        printf("Wrong usage\n");
        exit(-1);
    }
    return( fuse_main(argc, argv, &fuse_oper, NULL) );
}