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POFuse Filesystem Problem
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copied!<p>i'm developing a fuse filesystem that stores data in the RAM, but i'm having problems when i write something to a file. The file turns into a blank file.</p> <p>Here's the code:</p> <pre><code>#define FUSE_USE_VERSION 26 #include <fuse/fuse.h> #include <string.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> char hello_data[200] = {'h', 'e', 'l', 'l', 'o', '\n'}; int hello_size = 6; int homsifs_getattr(const char* path, struct stat* stbuf) { memset(stbuf, 0, sizeof(struct stat)); if (strcmp(path, "/") == 0) stbuf->st_mode = S_IFDIR | 0666; else if (strcmp(path, "/hello") == 0) { stbuf->st_mode = S_IFREG | 0666; stbuf->st_size = hello_size; } else return -ENOENT; return 0; } int homsifs_readdir(const char* path, void* buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info* fi) { if (strcmp(path, "/") != 0) return -ENOENT; filler(buf, ".", NULL, 0); filler(buf, "..", NULL, 0); filler(buf, "hello", NULL, 0); return 0; } int homsifs_open(const char* path, struct fuse_file_info* fi) { if (strcmp(path, "/hello") != 0) return -ENOENT; return 0; } int homsifs_read(const char* path, char* buf, size_t size, off_t offset, struct fuse_file_info* fi) { int offset_size = hello_size - offset; if (size > offset_size) size = offset_size; memcpy(buf, hello_data + offset, size); return size; } int homsifs_truncate(const char* path, off_t size) { if (size > 200) return -ENOMEM; if (hello_size < size) memset(hello_data + size, 0, size - hello_size); hello_size = size; return 0; } int homsifs_write(const char* path, const char* buf, size_t size, off_t offset, struct fuse_file_info* fi) { if (strcmp(path, "/hello") != 0) return -ENOENT; memcpy(hello_data + offset, buf, size); return size; } struct fuse_operations homsifs_operations = { .getattr = homsifs_getattr, .readdir = homsifs_readdir, .open = homsifs_open, .read = homsifs_read, .truncate = homsifs_truncate, .write = homsifs_write }; int main(int argc, char** argv) { return fuse_main(argc, argv, &homsifs_operations, NULL); } </code></pre> <p>Anyone knows what's wrong?</p> <p>Thanks.</p>

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