diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/tabfs.c | 33 |
1 files changed, 33 insertions, 0 deletions
@@ -32,6 +32,22 @@ static cJSON *send_request_then_await_response(cJSON *req) { return resp; } +// This helper macro is used to implement all the FUSE fs operations. +// +// It constructs a JSON object to represent the incoming request, then +// dispatches it to the WebSocket server in ws.c (which then +// dispatches it to our browser extension). It then awaits the +// response from the browser and lets us pull that apart to ultimately +// return the data to FUSE. +// +// OP is an opcode string which the extension handles in JS. +// REQ_BUILDER_BODY is a block which should add whatever request +// properties you want to send to the browser to the `req` cJSON +// object. RESP_HANDLER_BODY should handle whatever response +// properties are on the `resp` cJSON object and pass them back to the +// kernel. It should also set the value of `ret` to the desired +// return value. (MAKE_REQ takes over return from the containing +// function so it can automatically return error values.) #define MAKE_REQ(OP, REQ_BUILDER_BODY, RESP_HANDLER_BODY) \ do { \ int ret = -1; \ @@ -135,6 +151,22 @@ tabfs_read(const char *path, char *buf, size_t size, off_t offset, }); } +static int +tabfs_write(const char *path, const char *buf, size_t size, off_t offset, + struct fuse_file_info *fi) { + MAKE_REQ("write", { + cJSON_AddStringToObject(req, "path", path); + + char base64_buf[size + 1]; // ughh. + base64_encode((const unsigned char *) buf, size, base64_buf); + + cJSON_AddStringToObject(req, "buf", base64_buf); + cJSON_AddNumberToObject(req, "offset", offset); + }, { + ret = size; + }); +} + static int tabfs_release(const char *path, struct fuse_file_info *fi) { MAKE_REQ("release", { cJSON_AddStringToObject(req, "path", path); @@ -187,6 +219,7 @@ static struct fuse_operations tabfs_filesystem_operations = { .readlink = tabfs_readlink, .open = tabfs_open, /* To enforce read-only access. */ .read = tabfs_read, /* To provide file content. */ + .write = tabfs_write, .release = tabfs_release, .opendir = tabfs_opendir, |