From 045955d5db1fe146daf6768be28f85575e23c13b Mon Sep 17 00:00:00 2001
From: Kalle Carlbark <kalle.carlbark@kcbark.net>
Date: Wed, 10 Jul 2024 22:39:45 +0200
Subject: [PATCH] wip: macos

---
 examples/vt.zig                   |  2 +-
 src/widgets/terminal/Command.zig  | 43 ++++++++++++++++++++-----------
 src/widgets/terminal/Pty.zig      |  2 +-
 src/widgets/terminal/Terminal.zig |  3 +++
 4 files changed, 33 insertions(+), 17 deletions(-)

diff --git a/examples/vt.zig b/examples/vt.zig
index 4b1a570..fb9d618 100644
--- a/examples/vt.zig
+++ b/examples/vt.zig
@@ -49,6 +49,7 @@ pub fn main() !void {
     };
     const shell = env.get("SHELL") orelse "bash";
     const argv = [_][]const u8{shell};
+    std.debug.print("executing: {s}\n", .{shell});
     var vt = try vaxis.widgets.Terminal.init(
         alloc,
         &argv,
@@ -62,7 +63,6 @@ pub fn main() !void {
     var redraw: bool = false;
     while (true) {
         std.debug.print("inside while loop before resize\n", .{});
-        std.time.sleep(8 * std.time.ns_per_ms);
         // try vt events first
         while (vt.tryEvent()) |event| {
             std.debug.print("inside stryEventloop \n", .{});
diff --git a/src/widgets/terminal/Command.zig b/src/widgets/terminal/Command.zig
index 3681028..0638fb6 100644
--- a/src/widgets/terminal/Command.zig
+++ b/src/widgets/terminal/Command.zig
@@ -20,12 +20,13 @@ pty: Pty,
 const TIOCSCTTY = if (builtin.os.tag == .macos) 536900705 else c.TIOCSCTTY;
 const TIOCSWINSZ = if (builtin.os.tag == .macos) 2148037735 else c.TIOCSWINSZ;
 const TIOCGWINSZ = if (builtin.os.tag == .macos) 1074295912 else c.TIOCGWINSZ;
-extern "c" fn setsid() std.c.pid_t;
+// extern "c" fn setsid() std.c.pid_t;
 const c = struct {
     usingnamespace switch (builtin.os.tag) {
         .macos => @cImport({
             @cInclude("sys/ioctl.h"); // ioctl and constants
-            @cInclude("util.h"); // openpty()
+            @cInclude("util.h");
+            @cInclude("unistd.h"); // openpty()
         }),
         else => @cImport({
             @cInclude("sys/ioctl.h"); // ioctl and constants
@@ -47,15 +48,27 @@ pub fn spawn(self: *Command, allocator: std.mem.Allocator) !void {
 
     const pid = try std.posix.fork();
     if (pid == 0) {
-        // we are the child
-        _ = std.os.linux.setsid();
-        _ = setsid();
-        // if (setsid() < 0) return error.ProcessGroupFailed;
-
-        // set the controlling terminal
+        std.posix.close(self.pty.pty);
+        std.debug.print("inside child\n", .{});
+        if (c.setsid() != 0) return error.SetSid;
+        std.debug.print("setting up io for tty\n", .{});
         var u: c_uint = std.posix.STDIN_FILENO;
+
         if (c.ioctl(self.pty.tty, TIOCSCTTY, @intFromPtr(&u)) != 0) return error.IoctlError;
 
+        // switch (builtin.os.tag) {
+        //     .linux => {},
+        //     .ios, .macos => {
+        //         // Mac doesn't support dup3 so we use dup2. We purposely clear
+        //         // CLO_ON_EXEC for this fd.
+        //         const flags = try posix.fcntl(self.pty.tty, posix.F.GETFD, 0);
+        //         if (flags & posix.FD_CLOEXEC != 0) {
+        //             _ = try posix.fcntl(self.pty.tty, posix.F.SETFD, flags & ~@as(u32, posix.FD_CLOEXEC));
+        //         }
+        //     },
+        //     else => @compileError("unsupported platform"),
+        // }
+
         // set up io
         try posix.dup2(self.pty.tty, std.posix.STDIN_FILENO);
         try posix.dup2(self.pty.tty, std.posix.STDOUT_FILENO);
@@ -69,17 +82,17 @@ pub fn spawn(self: *Command, allocator: std.mem.Allocator) !void {
         }
 
         // exec
-        const err = std.posix.execvpeZ(argv_buf.ptr[0].?, argv_buf.ptr, envp);
-        _ = err catch {};
-    } else {
-        std.debug.print("we are not child: {d}\n", .{pid});
-        // posix.close(self.pty.tty);
-        _ = posix.waitpid(pid, 0);
+        _ = std.posix.execvpeZ(argv_buf.ptr[0].?, argv_buf.ptr, envp) catch null;
+
+        //return error.ExecFailed;
+        // const err = std.posix.execvpeZ("/bin/zsh", "/bin/zsh", envp);
+        // _ = err catch {};
     }
 
     // we are the parent
     self.pid = @intCast(pid);
-
+    _ = posix.waitpid(pid, 0);
+    std.debug.print("waitpid in parent\n", .{});
     if (!Terminal.global_sigchild_installed) {
         Terminal.global_sigchild_installed = true;
         var act = posix.Sigaction{
diff --git a/src/widgets/terminal/Pty.zig b/src/widgets/terminal/Pty.zig
index c3a046a..892bebb 100644
--- a/src/widgets/terminal/Pty.zig
+++ b/src/widgets/terminal/Pty.zig
@@ -33,7 +33,7 @@ tty: posix.fd_t,
 pub fn init() !Pty {
     switch (builtin.os.tag) {
         .linux => return openPtyLinux(),
-        .macos => return openPtyMacos2(),
+        .macos => return openPtyMacos(),
         else => @compileError("unsupported os"),
     }
 }
diff --git a/src/widgets/terminal/Terminal.zig b/src/widgets/terminal/Terminal.zig
index 9208eb7..b2983c0 100644
--- a/src/widgets/terminal/Terminal.zig
+++ b/src/widgets/terminal/Terminal.zig
@@ -94,6 +94,9 @@ pub fn init(
     unicode: *const vaxis.Unicode,
     opts: Options,
 ) !Terminal {
+    if (opts.initial_working_directory) |pwd| {
+        if (!std.fs.path.isAbsolute(pwd)) return error.InvalidWorkingDirectory;
+    }
     const pty = try Pty.init();
     try pty.setSize(opts.winsize);
     std.debug.print("set size done\n", .{});