Tweak README and Makefile for new deps, Linux support.

README.md

@@ -5,41 +5,33 @@
 You need to both install the Chrome extension and run the native
 filesystem.
 
+### Run the C filesystem
+
+First, make sure you `git submodule update --init` to get the
+`fs/cJSON` and `fs/base64` dependencies.
+
+And make sure you have FUSE. On Linux, for example, `sudo apt install
+libfuse-dev`. On macOS, get FUSE for macOS.
+
+```
+$ cd fs
+$ mkdir mnt
+$ make
+```
+
 ### Install the Chrome extension
 
 Go to the [Chrome extensions page](chrome://extensions).
 
 Enable Developer mode. Load-unpacked the `extension/` folder in this repo.
 
-### Run the C filesystem
-
-First, make sure you `git submodule update --init` to get the `mmx`
-and `cJSON` dependencies. And make sure you have FUSE.
-
-```
-$ cd fs
-$ mkdir mnt
-$ make [unmount] mount
-```
-
-### Connect the browser extension to the filesystem
-
-Once the filesystem is running and awaiting a WebSocket connection,
-you need to tell the browser extension to connect to it.
-
-Click the 'T' icon the extension put in your browser toolbar. The icon
-badge should change from red to blue, and the filesystem program
-should print that it's connected in the terminal.
-
 Now your browser tabs should be mounted in `fs/mnt`!
 
 ## Design
 
 - `extension/`: Browser extension, written in JS
 - `fs/`: Native FUSE filesystem, written in C
-  - `tabfs.c`: Main thread. Talks to FUSE, implements fs operations.
-  - `ws.c`: Side thread. Runs WebSocket server. Talks to browser.
-  - `common.c`: Communications interface between tabfs and ws.
+  - `tabfs.c`: Talks to FUSE, implements fs operations, talks to browser.
 
 When you, say, `cat` a file in the tab filesystem:
 
@@ -51,18 +43,14 @@ When you, say, `cat` a file in the tab filesystem:
    userspace filesystem in `fs/tabfs.c`,
 
 4. then `tabfs_read` rephrases the request as a JSON string and
-   forwards it using `common_send_tabfs_to_ws` to `fs/ws.c`,
-
-5. and `fs/ws.c` forwards it to our browser extension over WebSocket
-   connection;
+   forwards it to the browser extension over 'native messaging',
 
 6. our browser extension in `extension/background.js` handles the
    incoming message and calls the browser APIs to construct the data
    for that synthetic file;
 
-7. then the data gets sent back in a JSON message to `ws.c` and then
-   back to `tabfs.c` and finally back to FUSE and the kernel and
-   `cat`.
+7. then the data gets sent back in a JSON native message to `tabfs.c`
+   and and finally back to FUSE and the kernel and `cat`.
 
 (very little actual work happened here, tbh. it's all just
 marshalling)

fs/Makefile

@@ -4,24 +4,21 @@ TARGETS = tabfs
 OSXFUSE_ROOT = /usr/local
 #OSXFUSE_ROOT = /opt/local
 
-INCLUDE_DIR = $(OSXFUSE_ROOT)/include/osxfuse/fuse
-LIBRARY_DIR = $(OSXFUSE_ROOT)/lib
+CFLAGS_EXTRA = -DFUSE_USE_VERSION=26 -D_FILE_OFFSET_BITS=64 -Wall -Wno-unused-function -g
 
-CC ?= gcc
-
-CFLAGS_OSXFUSE = -I$(INCLUDE_DIR) -L$(LIBRARY_DIR)
-CFLAGS_OSXFUSE += -DFUSE_USE_VERSION=26
-CFLAGS_OSXFUSE += -D_FILE_OFFSET_BITS=64
-CFLAGS_OSXFUSE += -D_DARWIN_USE_64_BIT_INODE
-
-CFLAGS_EXTRA = -Wall -Wno-unused-function -g $(CFLAGS)
-
-LIBS = -losxfuse
+ifeq ($(shell uname -s),Linux)
+	CFLAGS = $(CFLAGS_EXTRA)
+	LIBS = -lfuse
+endif
+ifeq ($(shell uname -s),Darwin)
+	CFLAGS = -I$(OSXFUSE_ROOT)/include/osxfuse/fuse -L$(OSXFUSE_ROOT)/lib -D_DARWIN_USE_64_BIT_INODE $(CFLAGS_EXTRA)
+	LIBS = -losxfuse
+endif
 
 all: $(TARGETS)
 
 tabfs: tabfs.c
-	$(CC) $(CFLAGS_OSXFUSE) $(CFLAGS_EXTRA) -o $@ $^ $(LIBS)
+	cc $(CFLAGS) -o $@ $^ $(LIBS)
 
 clean:
 	rm -f $(TARGETS) *.o
@@ -30,9 +27,3 @@ clean:
 unmount:
 	killall -9 tabfs || true
 	diskutil unmount force mnt || true
-
-mount: tabfs
-	./tabfs -odirect_io -s -f mnt
-
-debugmount: tabfs
-	lldb -- ./tabfs -odirect_io -s -f mnt