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add fuse.context(). fixes #3

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Mathias Buus 10 years ago
parent 9cb20308ad
commit 3bc7238626
3 changed files with 74 additions and 34 deletions
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5
README.md
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@ -90,6 +90,11 @@ Pass the FUSE operations you want to support as the `ops` argument.
Unmount a filesystem
#### `fuse.context()`
Returns the current fuse context (pid, uid, gid).
Must be called inside a fuse callback.
## Mount options
#### `ops.options`

97
fuse-bindings.cc
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@ -64,6 +64,11 @@ struct bindings_t {
int index;
int gc;
// fuse context
int context_uid;
int context_gid;
int context_pid;
// fuse data
char mnt[1024];
char mntopts[1024];
@ -128,6 +133,7 @@ struct bindings_t {
static bindings_t *bindings_mounted[1024];
static int bindings_mounted_count = 0;
static bindings_t *bindings_current = NULL;
#ifdef __APPLE__
NAN_INLINE static int semaphore_init (dispatch_semaphore_t *sem) {
@ -207,8 +213,17 @@ NAN_INLINE static int bindings_call (bindings_t *b) {
return b->result;
}
static bindings_t *bindings_get_context () {
fuse_context *ctx = fuse_get_context();
bindings_t *b = (bindings_t *) ctx->private_data;
b->context_pid = ctx->pid;
b->context_uid = ctx->uid;
b->context_gid = ctx->gid;
return b;
}
static int bindings_truncate (const char *path, off_t size) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_TRUNCATE;
b->path = (char *) path;
@ -218,7 +233,7 @@ static int bindings_truncate (const char *path, off_t size) {
}
static int bindings_ftruncate (const char *path, off_t size, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_FTRUNCATE;
b->path = (char *) path;
@ -229,7 +244,7 @@ static int bindings_ftruncate (const char *path, off_t size, struct fuse_file_in
}
static int bindings_getattr (const char *path, struct stat *stat) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_GETATTR;
b->path = (char *) path;
@ -239,7 +254,7 @@ static int bindings_getattr (const char *path, struct stat *stat) {
}
static int bindings_fgetattr (const char *path, struct stat *stat, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_FGETATTR;
b->path = (char *) path;
@ -250,7 +265,7 @@ static int bindings_fgetattr (const char *path, struct stat *stat, struct fuse_f
}
static int bindings_flush (const char *path, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_FLUSH;
b->path = (char *) path;
@ -260,7 +275,7 @@ static int bindings_flush (const char *path, struct fuse_file_info *info) {
}
static int bindings_fsync (const char *path, int datasync, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_FSYNC;
b->path = (char *) path;
@ -271,7 +286,7 @@ static int bindings_fsync (const char *path, int datasync, struct fuse_file_info
}
static int bindings_fsyncdir (const char *path, int datasync, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_FSYNCDIR;
b->path = (char *) path;
@ -282,7 +297,7 @@ static int bindings_fsyncdir (const char *path, int datasync, struct fuse_file_i
}
static int bindings_readdir (const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_READDIR;
b->path = (char *) path;
@ -293,7 +308,7 @@ static int bindings_readdir (const char *path, void *buf, fuse_fill_dir_t filler
}
static int bindings_readlink (const char *path, char *buf, size_t len) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_READLINK;
b->path = (char *) path;
@ -304,7 +319,7 @@ static int bindings_readlink (const char *path, char *buf, size_t len) {
}
static int bindings_chown (const char *path, uid_t uid, gid_t gid) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_CHOWN;
b->path = (char *) path;
@ -315,7 +330,7 @@ static int bindings_chown (const char *path, uid_t uid, gid_t gid) {
}
static int bindings_chmod (const char *path, mode_t mode) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_CHMOD;
b->path = (char *) path;
@ -326,7 +341,7 @@ static int bindings_chmod (const char *path, mode_t mode) {
#ifdef __APPLE__
static int bindings_setxattr (const char *path, const char *name, const char *value, size_t size, int flags, uint32_t position) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_SETXATTR;
b->path = (char *) path;
@ -340,7 +355,7 @@ static int bindings_setxattr (const char *path, const char *name, const char *va
}
static int bindings_getxattr (const char *path, const char *name, char *value, size_t size, uint32_t position) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_GETXATTR;
b->path = (char *) path;
@ -353,7 +368,7 @@ static int bindings_getxattr (const char *path, const char *name, char *value, s
}
#else
static int bindings_setxattr (const char *path, const char *name, const char *value, size_t size, int flags) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_SETXATTR;
b->path = (char *) path;
@ -367,7 +382,7 @@ static int bindings_setxattr (const char *path, const char *name, const char *va
}
static int bindings_getxattr (const char *path, const char *name, char *value, size_t size) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_GETXATTR;
b->path = (char *) path;
@ -381,7 +396,7 @@ static int bindings_getxattr (const char *path, const char *name, char *value, s
#endif
static int bindings_statfs (const char *path, struct statvfs *statfs) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_STATFS;
b->path = (char *) path;
@ -391,7 +406,7 @@ static int bindings_statfs (const char *path, struct statvfs *statfs) {
}
static int bindings_open (const char *path, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_OPEN;
b->path = (char *) path;
@ -402,7 +417,7 @@ static int bindings_open (const char *path, struct fuse_file_info *info) {
}
static int bindings_opendir (const char *path, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_OPENDIR;
b->path = (char *) path;
@ -413,7 +428,7 @@ static int bindings_opendir (const char *path, struct fuse_file_info *info) {
}
static int bindings_read (const char *path, char *buf, size_t len, off_t offset, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_READ;
b->path = (char *) path;
@ -426,7 +441,7 @@ static int bindings_read (const char *path, char *buf, size_t len, off_t offset,
}
static int bindings_write (const char *path, const char *buf, size_t len, off_t offset, struct fuse_file_info * info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_WRITE;
b->path = (char *) path;
@ -439,7 +454,7 @@ static int bindings_write (const char *path, const char *buf, size_t len, off_t
}
static int bindings_release (const char *path, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_RELEASE;
b->path = (char *) path;
@ -449,7 +464,7 @@ static int bindings_release (const char *path, struct fuse_file_info *info) {
}
static int bindings_releasedir (const char *path, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_RELEASEDIR;
b->path = (char *) path;
@ -459,7 +474,7 @@ static int bindings_releasedir (const char *path, struct fuse_file_info *info) {
}
static int bindings_access (const char *path, int mode) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_ACCESS;
b->path = (char *) path;
@ -469,7 +484,7 @@ static int bindings_access (const char *path, int mode) {
}
static int bindings_create (const char *path, mode_t mode, struct fuse_file_info *info) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_CREATE;
b->path = (char *) path;
@ -480,7 +495,7 @@ static int bindings_create (const char *path, mode_t mode, struct fuse_file_info
}
static int bindings_utimens (const char *path, const struct timespec tv[2]) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_UTIMENS;
b->path = (char *) path;
@ -490,7 +505,7 @@ static int bindings_utimens (const char *path, const struct timespec tv[2]) {
}
static int bindings_unlink (const char *path) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_UNLINK;
b->path = (char *) path;
@ -499,7 +514,7 @@ static int bindings_unlink (const char *path) {
}
static int bindings_rename (const char *src, const char *dest) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_RENAME;
b->path = (char *) src;
@ -509,7 +524,7 @@ static int bindings_rename (const char *src, const char *dest) {
}
static int bindings_link (const char *path, const char *dest) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_LINK;
b->path = (char *) path;
@ -519,7 +534,7 @@ static int bindings_link (const char *path, const char *dest) {
}
static int bindings_symlink (const char *path, const char *dest) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_SYMLINK;
b->path = (char *) path;
@ -529,7 +544,7 @@ static int bindings_symlink (const char *path, const char *dest) {
}
static int bindings_mkdir (const char *path, mode_t mode) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_MKDIR;
b->path = (char *) path;
@ -539,7 +554,7 @@ static int bindings_mkdir (const char *path, mode_t mode) {
}
static int bindings_rmdir (const char *path) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_RMDIR;
b->path = (char *) path;
@ -548,7 +563,7 @@ static int bindings_rmdir (const char *path) {
}
static void* bindings_init (struct fuse_conn_info *conn) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_INIT;
@ -557,7 +572,7 @@ static void* bindings_init (struct fuse_conn_info *conn) {
}
static void bindings_destroy (void *data) {
bindings_t *b = (bindings_t *) fuse_get_context()->private_data;
bindings_t *b = bindings_get_context();
b->op = OP_DESTROY;
@ -747,6 +762,7 @@ NAN_METHOD(OpCallback) {
bindings_t *b = bindings_mounted[args[0]->Uint32Value()];
b->result = (args.Length() > 1 && args[1]->IsNumber()) ? args[1]->Uint32Value() : 0;
bindings_current = NULL;
if (!b->result) {
switch (b->op) {
@ -823,7 +839,7 @@ NAN_INLINE static void bindings_call_op (bindings_t *b, NanCallback *fn, int arg
static void bindings_dispatch (uv_async_t* handle, int status) {
NanScope();
bindings_t *b = (bindings_t *) handle->data;
bindings_t *b = bindings_current = (bindings_t *) handle->data;
Local<Function> callback = b->callback->GetFunction();
b->result = -1;
@ -1187,6 +1203,18 @@ NAN_METHOD(SetBuffer) {
NanReturnUndefined();
}
NAN_METHOD(PopulateContext) {
NanScope();
if (bindings_current == NULL) return NanThrowError("You have to call this inside a fuse operation");
Local<Object> ctx = args[0].As<Object>();
ctx->Set(NanNew<String>("uid"), NanNew(bindings_current->context_uid));
ctx->Set(NanNew<String>("gid"), NanNew(bindings_current->context_gid));
ctx->Set(NanNew<String>("pid"), NanNew(bindings_current->context_pid));
NanReturnUndefined();
}
NAN_METHOD(Unmount) {
NanScope();
@ -1206,6 +1234,7 @@ void Init(Handle<Object> exports) {
exports->Set(NanNew("setBuffer"), NanNew<FunctionTemplate>(SetBuffer)->GetFunction());
exports->Set(NanNew("mount"), NanNew<FunctionTemplate>(Mount)->GetFunction());
exports->Set(NanNew("unmount"), NanNew<FunctionTemplate>(Unmount)->GetFunction());
exports->Set(NanNew("populateContext"), NanNew<FunctionTemplate>(PopulateContext)->GetFunction());
}
NODE_MODULE(fuse_bindings, Init)

6
index.js
Unescape View File

@ -24,6 +24,12 @@ fuse.setCallback(function (index, callback) {
return callback.bind(null, index)
})
exports.context = function () {
var ctx = {}
fuse.populateContext(ctx)
return ctx
}
exports.mount = function (mnt, ops, cb) {
if (!cb) cb = noop

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