use own implementation of static filesystem, since webfuse deprecated their one

.gitignore

@@ -1,2 +1,3 @@
 /build/
 /.deps/
+/.vscode/

CMakeLists.txt

@@ -35,7 +35,9 @@ target_link_libraries(webfuse-provider-app PUBLIC webfuse-provider ${WEBFUSE_LIB
 # static-filesystem-provider
 
 add_executable(static-filesystem-provider
-	src/static_filesystem.c
+	src/static_filesystem/static_filesystem.c
+	src/static_filesystem/path.c
+	src/static_filesystem/main.c
 )
 
 target_link_libraries(static-filesystem-provider PUBLIC webfuse-provider ${WEBFUSE_LIBRARIES})

src/static_filesystem/main.c

@@ -5,6 +5,7 @@
 #include <signal.h>
 
 #include "webfuse_provider.h"
+#include "static_filesystem.h"
 
 #define SERVICE_TIMEOUT (1 * 1000)
 

src/static_filesystem/path.c

@@ -0,0 +1,116 @@
+#include "path.h"
+#include <stdlib.h>
+#include <string.h>
+
+#define PATH_DEFAULT_CAPACITY (8)
+
+struct path
+{
+    char * * elements;
+    size_t count;
+    size_t capacity;
+};
+
+static void 
+path_add(
+    struct path * path,
+    char const * element,
+    size_t element_size)
+{
+    if (0 < element_size)
+    {
+        if (path->count >= path->capacity)
+        {
+            size_t new_capacity = 2 * path->capacity;
+            size_t new_size = sizeof(char*) * new_capacity;
+
+            char * * elements = realloc(path->elements, new_size);
+            if (NULL != elements)
+            {
+                path->elements = elements;
+                path->capacity = new_capacity;
+            }
+        }
+
+        if (path->count < path->capacity)
+        {
+            path->elements[path->count] = strndup(element, element_size);
+            path->count++;
+        }
+    }
+}
+
+struct path *
+path_create(
+    char const * value)
+{
+    struct path * path = malloc(sizeof(struct path));
+    if (NULL != path)
+    {
+        path->elements = malloc(sizeof(char*) * PATH_DEFAULT_CAPACITY);
+        path->capacity = PATH_DEFAULT_CAPACITY;
+        path->count = 0;
+
+        char const * remainder = value;
+        char const * pos = strchr(remainder, '/');
+        while (NULL != pos)
+        {
+            path_add(path, remainder, (pos - remainder));
+            remainder = pos + 1;
+            pos = strchr(remainder, '/');
+        }
+
+        path_add(path, remainder, strlen(remainder));
+    }
+
+    return path;
+}
+
+void
+path_dispose(
+    struct path * path)
+{
+    for(size_t i = 0; i < path->count; i++)
+    {
+        free(path->elements[i]);
+    }
+
+    free(path->elements);
+    free(path);
+    (void) path;
+}
+
+size_t
+path_element_count(
+    struct path * path)
+{
+    return path->count;
+}
+
+char const *
+path_get_element(
+    struct path * path,
+    size_t i)
+{  
+    char const * result = NULL;
+    if (i < path->count)
+    {
+        result = path->elements[i];
+    }
+
+    return result;
+}
+
+char const *
+path_get_filename(
+    struct path * path)
+{
+    char const * result = NULL;
+
+    if (0 < path->count)
+    {
+        result = path->elements[path->count - 1];
+    }
+
+    return result;
+}

src/static_filesystem/path.h

@@ -0,0 +1,43 @@
+#ifndef PATH_H
+#define PATH_H
+
+#ifndef __cplusplus
+#include <stddef.h>
+#else
+#include <cstddef>
+using ::std::size_t;
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+struct path;
+
+extern struct path *
+path_create(
+    char const * value);
+
+extern void
+path_dispose(
+    struct path * path);
+
+extern size_t
+path_element_count(
+    struct path * path);
+
+extern char const *
+path_get_element(
+    struct path * path,
+    size_t i);
+
+extern char const *
+path_get_filename(
+    struct path * path);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/static_filesystem/static_filesystem.c

@@ -0,0 +1,500 @@
+#include "static_filesystem.h"
+
+#include "webfuse/provider/client_config.h"
+#include "webfuse/provider/dirbuffer.h"
+#include "webfuse/provider/operation/error.h"
+
+#include "path.h"
+
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+
+#define STATIC_FILESYSTEM_DEFAULT_CAPACITY (16)
+#define STATIC_FILSYSTEM_INODE_ROOT (1)
+#define STATIC_FILESYSTEM_MAX_READ_SIZE (4 * 1024)
+
+struct static_filesystem_entry
+{
+    size_t inode;
+    size_t parent;
+    char * name;
+    bool is_file;
+    int mode;
+    size_t size;
+    char * content;
+    static_filesystem_read_fn * read;
+    static_filesystem_get_info_fn * get_info;
+    void * user_data;
+};
+
+struct static_filesystem
+{
+    struct static_filesystem_entry * entries;
+    size_t size;
+    size_t capacity;
+};
+
+static struct static_filesystem_entry *
+static_filesystem_get_entry(
+    struct static_filesystem * filesystem,
+    size_t inode)
+{
+    struct static_filesystem_entry * entry = NULL;
+
+    if ((0 < inode) && (inode <= filesystem->size))
+    {
+        entry = &filesystem->entries[inode - 1];
+    }
+    
+    return entry;
+}
+
+static struct static_filesystem_entry *
+static_filesystem_get_entry_by_name(
+    struct static_filesystem * filesystem,
+    size_t parent,
+    char const * name)
+{
+    struct static_filesystem_entry * entry = NULL;
+    for(size_t i = 0; i < filesystem->size; i++)
+    {
+        struct static_filesystem_entry * current = &filesystem->entries[i];
+        if ((parent == current->parent) && (0 == strcmp(name, current->name)))
+        {
+            entry = current;
+            break;
+        }
+    }
+
+    return entry;
+}
+
+static struct  static_filesystem_entry *
+static_filesystem_add_entry(
+    struct static_filesystem * filesystem)
+{
+    struct  static_filesystem_entry * entry = NULL;
+
+    if (filesystem->size >= filesystem->capacity)
+    {
+        struct static_filesystem_entry * entries;
+
+        size_t new_capacity = 2 * filesystem->capacity;
+        size_t new_size = new_capacity * sizeof(struct static_filesystem_entry);
+        entries = realloc(filesystem->entries, new_size);
+
+        if (NULL != entries)
+        {
+            filesystem->entries = entries;
+            filesystem->capacity = new_capacity;
+        }
+    }
+
+    if (filesystem->size < filesystem->capacity)
+    {
+        entry = &filesystem->entries[filesystem->size];
+        entry->inode = filesystem->size + 1;
+        filesystem->size++;
+    }    
+
+    return entry;
+}
+
+static size_t
+static_filesystem_entry_read(
+    size_t offset,
+    char * buffer,
+    size_t buffer_size,
+    void * user_data)
+{
+    size_t result = 0;
+    struct static_filesystem_entry * entry = user_data;
+    if (offset < entry->size)
+    {
+        size_t remaining = (entry->size - offset);
+        result = (buffer_size < remaining) ? buffer_size : remaining;
+        memcpy(buffer, entry->content, result);
+    }
+
+    return result;
+}
+
+static void
+static_filesystem_entry_get_info(
+    void * user_data,
+    int * result_mode,
+    size_t * result_size)
+{
+    struct static_filesystem_entry * entry = user_data;
+    *result_mode = entry->mode;
+    *result_size = entry->size;
+}
+
+static size_t
+static_filesystem_file_read(
+    size_t offset,
+    char * buffer,
+    size_t buffer_size,
+    void * user_data)
+{
+    size_t result = 0;
+    struct static_filesystem_entry * entry = user_data;
+    char const * filename = entry->content;
+
+    FILE * file = fopen(filename, "rb");
+    if (NULL != file)
+    {
+        fseek(file, offset, SEEK_SET);
+        result = fread(buffer, buffer_size, 1, file);
+        fclose(file);
+    }
+
+    return result;
+}
+
+static void
+static_filesystem_file_get_info(
+    void * user_data,
+    int * result_mode,
+    size_t * result_size)
+{
+    struct static_filesystem_entry * entry = user_data;
+    char const * filename = entry->content;
+
+    struct stat buffer;
+    stat(filename, &buffer);
+
+    *result_mode = (int) (buffer.st_mode & 0777);
+    *result_size = (size_t) buffer.st_size;
+}
+
+
+static size_t
+static_filesystem_add_dir(
+    struct static_filesystem * filesystem,
+    size_t parent,
+    char const * name
+)
+{
+    struct  static_filesystem_entry * entry = static_filesystem_get_entry_by_name(filesystem, parent, name);
+    if (NULL == entry)
+    {
+        entry = static_filesystem_add_entry(filesystem);
+        entry->parent = parent;
+        entry->is_file = false;
+        entry->mode = 0555;
+        entry->name = strdup(name);
+        entry->user_data = entry;
+        entry->read = &static_filesystem_entry_read;
+        entry->get_info = &static_filesystem_entry_get_info;
+        entry->size = 0;
+        entry->content = NULL;
+    }
+    
+    return entry->inode;
+}
+
+static size_t
+static_filesystem_make_parent(
+    struct static_filesystem * filesystem,
+    struct path * path)
+{
+    size_t result = STATIC_FILSYSTEM_INODE_ROOT;
+
+    size_t count = path_element_count(path);
+    if (0 < count)
+    {
+        for(size_t i = 0; i < (count - 1); i++)
+        {
+            char const * name = path_get_element(path, i);
+            result = static_filesystem_add_dir(filesystem, result, name);
+        }
+    }
+
+    return result;
+}
+
+static void
+static_filesystem_stat(
+    struct static_filesystem_entry * entry,
+    struct stat * stat
+)
+{
+    memset(stat, 0, sizeof(struct stat));
+
+    int mode;
+    size_t size;
+    entry->get_info(entry->user_data, &mode, &size);   
+
+    stat->st_ino = entry->inode;
+    stat->st_size = entry->size;
+    stat->st_mode = entry->mode & 0777;
+    stat->st_mode |= (entry->is_file) ? S_IFREG: S_IFDIR;
+}
+
+static void static_filesystem_lookup(
+    struct wfp_request * request,
+    ino_t parent,
+    char const * name,
+    void * user_data)
+{
+    struct static_filesystem * filesystem = user_data;
+    struct static_filesystem_entry * entry = static_filesystem_get_entry_by_name(filesystem, parent, name);
+
+    if (NULL != entry)
+    {
+        struct stat stat;
+        static_filesystem_stat(entry, &stat);
+        wfp_respond_lookup(request, &stat);
+    }
+    else
+    {
+        wfp_respond_error(request, WF_BAD_NOENTRY);
+    }
+}
+
+
+static void static_filesystem_getattr(
+    struct wfp_request * request,
+    ino_t inode,
+    void * user_data)
+{
+    struct static_filesystem * filesystem = user_data;
+    struct static_filesystem_entry * entry = static_filesystem_get_entry(filesystem, inode);
+
+    if (NULL != entry)
+    {
+        struct stat stat;
+        static_filesystem_stat(entry, &stat);
+        wfp_respond_getattr(request, &stat);
+    }
+    else
+    {
+        wfp_respond_error(request, WF_BAD_NOENTRY);
+    }
+}
+
+static void static_filesystem_readdir(
+    struct wfp_request * request,
+    ino_t directory,
+    void * user_data)
+{
+    struct static_filesystem * filesystem = user_data;
+    struct static_filesystem_entry * dir = static_filesystem_get_entry(filesystem, directory);
+
+    if ((NULL != dir) && (!dir->is_file))
+    {
+        struct wfp_dirbuffer * buffer = wfp_dirbuffer_create();
+        wfp_dirbuffer_add(buffer, ".", dir->inode);
+        wfp_dirbuffer_add(buffer, "..", dir->inode);
+
+        for(size_t i = 0; i < filesystem->size; i++)
+        {
+            struct static_filesystem_entry const * entry = &filesystem->entries[i];
+            if (directory == entry->parent)
+            {
+                wfp_dirbuffer_add(buffer, entry->name, entry->inode);
+            }
+        }
+
+        wfp_respond_readdir(request, buffer);
+        wfp_dirbuffer_dispose(buffer);
+    }
+    else
+    {
+        wfp_respond_error(request, WF_BAD_NOENTRY);
+    }
+}
+
+static void static_filesystem_open(
+    struct wfp_request * request,
+    ino_t inode,
+    int flags,
+    void * user_data)
+{
+    struct static_filesystem * filesystem = user_data;
+    struct static_filesystem_entry * entry = static_filesystem_get_entry(filesystem, inode);
+
+    if ((NULL != entry) && (entry->is_file))
+    {
+        if (O_RDONLY == (flags & O_ACCMODE))
+        {
+            wfp_respond_open(request, 0U);
+        }
+        else
+        {
+            wfp_respond_error(request, WF_BAD_ACCESS_DENIED);
+        }
+    }
+    else
+    {
+        wfp_respond_error(request, WF_BAD_NOENTRY);
+    }
+}
+
+static void static_filesystem_read(
+    struct wfp_request * request,
+    ino_t inode,
+    uint32_t handle,
+    size_t offset,
+    size_t length,
+    void * user_data)
+{
+    (void) handle;
+
+    struct static_filesystem * filesystem = user_data;
+    struct static_filesystem_entry * entry = static_filesystem_get_entry(filesystem, inode);
+
+    if ((NULL != entry) && (entry->is_file))
+    {
+        char buffer[STATIC_FILESYSTEM_MAX_READ_SIZE];
+        size_t max_size = (length < STATIC_FILESYSTEM_MAX_READ_SIZE) ? length : STATIC_FILESYSTEM_MAX_READ_SIZE;
+
+        size_t count = entry->read(offset, buffer, max_size, entry->user_data);
+        wfp_respond_read(request, buffer, count);
+    }
+    else
+    {
+        wfp_respond_error(request, WF_BAD_NOENTRY);
+    }    
+}
+
+
+struct static_filesystem *
+static_filesystem_create(
+    struct wfp_client_config * config)
+{
+    (void) config;
+
+    struct static_filesystem * filesystem = malloc(sizeof(struct static_filesystem));
+    if (NULL != filesystem)
+    {
+        filesystem->entries = malloc(sizeof(struct static_filesystem_entry) * STATIC_FILESYSTEM_DEFAULT_CAPACITY);
+        filesystem->size = 0;
+        filesystem->capacity = STATIC_FILESYSTEM_DEFAULT_CAPACITY;
+
+        static_filesystem_add_dir(filesystem, 0, "<root>");
+
+        wfp_client_config_set_userdata(config, filesystem);
+        wfp_client_config_set_onlookup(config, &static_filesystem_lookup);
+        wfp_client_config_set_ongetattr(config, &static_filesystem_getattr);
+        wfp_client_config_set_onreaddir(config, &static_filesystem_readdir);
+        wfp_client_config_set_onopen(config, &static_filesystem_open);
+        wfp_client_config_set_onread(config, &static_filesystem_read);
+    }
+
+    return filesystem;
+}
+
+void
+static_filesystem_dispose(
+    struct static_filesystem * filesystem)
+{
+    for(size_t i = 0; i < filesystem->size; i++)
+    {
+        struct static_filesystem_entry * entry = &filesystem->entries[i];
+        free(entry->name);
+        free(entry->content);
+    }
+
+    free(filesystem->entries);
+    free(filesystem);
+}
+
+void
+static_filesystem_add(
+    struct static_filesystem * filesystem,
+    char const * path,
+    int mode,
+    char const * content,
+    size_t length)
+{
+    struct path * path_ = path_create(path);
+    if (NULL != path_)
+    {
+        size_t parent = static_filesystem_make_parent(filesystem, path_);
+        struct static_filesystem_entry * entry = static_filesystem_add_entry(filesystem);
+        entry->parent = parent;
+        entry->is_file = true;
+        entry->name = strdup(path_get_filename(path_));
+        entry->mode = mode;
+        entry->size = length;
+        entry->get_info = &static_filesystem_entry_get_info;
+        entry->read = &static_filesystem_entry_read;
+        entry->user_data = entry;
+
+        entry->content = malloc(length);
+        memcpy(entry->content, content, length);
+
+        path_dispose(path_);
+    }
+}
+
+void
+static_filesystem_add_text(
+    struct static_filesystem * filesystem,
+    char const * path,
+    int mode,
+    char const * content)
+{
+    size_t length = strlen(content);
+    static_filesystem_add(filesystem, path, mode, content, length);
+}
+
+void
+static_filesystem_add_file(
+    struct static_filesystem * filesystem,
+    char const * path,
+    char const * filename)
+{
+    struct path * path_ = path_create(path);
+    if (NULL != path_)
+    {
+        size_t parent = static_filesystem_make_parent(filesystem, path_);
+        struct static_filesystem_entry * entry = static_filesystem_add_entry(filesystem);
+        entry->parent = parent;
+        entry->is_file = true;
+        entry->mode = 0;
+        entry->content = strdup(filename);
+        entry->size = 0;
+        entry->name = strdup(path_get_filename(path_));
+        entry->get_info = &static_filesystem_file_get_info;
+        entry->read = &static_filesystem_file_read;
+        entry->user_data = entry;
+
+        path_dispose(path_);
+    }
+}
+
+void
+static_filesystem_add_generic(
+    struct static_filesystem * filesystem,
+    char const * path,
+    static_filesystem_read_fn * read,
+    static_filesystem_get_info_fn * get_info,
+    void * user_data)
+{
+    struct path * path_ = path_create(path);
+    if (NULL != path_)
+    {
+        size_t parent = static_filesystem_make_parent(filesystem, path_);
+        struct static_filesystem_entry * entry = static_filesystem_add_entry(filesystem);
+        entry->parent = parent;
+        entry->is_file = true;
+        entry->mode = 0;
+        entry->content = NULL;
+        entry->size = 0;
+        entry->name = strdup(path_get_filename(path_));
+        entry->get_info = get_info;
+        entry->read = read;
+        entry->user_data = user_data;
+
+        path_dispose(path_);
+    }
+}

src/static_filesystem/static_filesystem.h

@@ -0,0 +1,73 @@
+#ifndef STATIC_FILESYSTEM_H
+#define STATIC_FILESYSTEM_H
+
+#ifndef __cplusplus
+#include <stddef.h>
+#else
+#include <cstddef>
+using ::std::size_t;
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+struct wfp_client_config;
+struct wfp_static_filesystem;
+
+typedef size_t
+static_filesystem_read_fn(
+    size_t offset,
+    char * buffer,
+    size_t buffer_size,
+    void * user_data);
+
+typedef void
+static_filesystem_get_info_fn(
+    void * user_data,
+    int * result_mode,
+    size_t * result_size);
+
+extern struct static_filesystem *
+static_filesystem_create(
+    struct wfp_client_config * config);
+
+extern void
+static_filesystem_dispose(
+    struct static_filesystem * filesystem);
+
+extern void
+static_filesystem_add(
+    struct static_filesystem * filesystem,
+    char const * path,
+    int mode,
+    char const * content,
+    size_t length);
+
+extern void
+static_filesystem_add_text(
+    struct static_filesystem * filesystem,
+    char const * path,
+    int mode,
+    char const * content);
+
+extern void
+static_filesystem_add_file(
+    struct static_filesystem * filesystem,
+    char const * path,
+    char const * filename);
+
+extern void
+static_filesystem_add_generic(
+    struct static_filesystem * filesystem,
+    char const * path,
+    static_filesystem_read_fn * read,
+    static_filesystem_get_info_fn * get_info,
+    void * user_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif