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-rw-r--r--src/detached/server.zig28
-rw-r--r--src/exec.zig12
-rw-r--r--src/gui/gui.zig33
-rw-r--r--src/host_io.zig88
-rw-r--r--src/macos.zig41
-rw-r--r--src/panes.zig3
-rw-r--r--src/pardes.zig14
-rw-r--r--src/tty/tty.zig39
8 files changed, 139 insertions, 119 deletions
diff --git a/src/detached/server.zig b/src/detached/server.zig
index b47bda1b..8fc7b96e 100644
--- a/src/detached/server.zig
+++ b/src/detached/server.zig
@@ -484,7 +484,7 @@ pub const Session = struct {
s.ninep,
) catch |err| return s.core.reportError(pane, "shell", err);
const command = if (s.core.panes[pane]) |pn| pn.command != null else false;
- s.ptys[pane] = .{ .fd = child.file.handle, .pid = child.pid, .cmd = .{ .watched = command and host_io.watchExit(child.pid) } };
+ s.ptys[pane] = .{ .fd = child.file.handle, .pid = child.pid, .cmd = .{ .watched = command and host_io.watchExit(child.pid), .fd = child.file.handle } };
setNonblock(child.file.handle);
var lbuf: [pardes.memory.limits.host_path_cap + 1]u8 = undefined;
if (host_io.shellCwd(child.pid, &lbuf)) |wd| s.core.setCwd(pane, wd);
@@ -697,11 +697,7 @@ pub const Session = struct {
// A command's pty stays open until its child has exited: closing
// it would hang up one that runs on without it.
// Its exit, if it came first, is told now its output is in.
- if (pt.cmd.watched) {
- pt.cmd.eof = true;
- s.core.update(.{ .eof = .{ .pane = pane } });
- return s.takeExits();
- }
+ if (pt.cmd.watched) return host_io.commandEof(s.core, &s.ptys, pane, s, closeWatched);
// Unwatched, a command's exit is read here, as its end.
const unwatched = if (s.core.panes[pane]) |pn| pn.command != null else false;
var status: ?u8 = null;
@@ -715,21 +711,13 @@ pub const Session = struct {
s.core.update(.{ .eof = .{ .pane = pane } });
}
- /// Each watched child that exited: reaped, the core told, and its pty
- /// closed if its end of file came first.
+ /// The command panes' exits, told once their output is in (host_io).
fn takeExits(s: *Session) void {
- while (host_io.takeExited()) |pid| for (&s.ptys) |*pt| {
- if (pt.fd < 0 or pt.pid != pid or pt.cmd.exited) continue;
- pt.cmd.exit((host_io.reapExited(pid) orelse break).status);
- pt.pid = 0; // reaped: no signal or retire may reach whoever gets it next
- break;
- };
- for (&s.ptys, 0..) |*pt, id| {
- if (pt.fd < 0 or !pt.cmd.due()) continue;
- pt.cmd.told = true;
- s.core.update(.{ .exited = .{ .pane = @intCast(id), .status = pt.cmd.status } });
- if (pt.cmd.eof) s.closePty(@intCast(id));
- }
+ host_io.takeExits(s.core, &s.ptys, s, closeWatched);
+ }
+
+ fn closeWatched(s: *Session, id: usize) void {
+ s.closePty(@intCast(id));
}
fn harvest(s: *Session) void {
diff --git a/src/exec.zig b/src/exec.zig
index dfef2dfd..cd2b4089 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -544,9 +544,11 @@ fn runCommand(p: *Pardes, from: usize, line: []const u8) ?usize {
}
const src = p.panes[from] orelse return null;
const dir = Pardes.paneDir(src);
- const reuse: ?usize = if (src.command != null and src.command_done) from else for (p.panes, 0..) |slot, i| {
+ // Not one whose pty a job it left behind still prints to: reusing it
+ // would hang that job up.
+ const reuse: ?usize = if (src.command != null and src.command_done and !src.command_pty) from else for (p.panes, 0..) |slot, i| {
const other = slot orelse continue;
- if (other.command != null and other.command_done and std.mem.eql(u8, other.cwdSlice(), dir)) break i;
+ if (other.command != null and other.command_done and !other.command_pty and std.mem.eql(u8, other.cwdSlice(), dir)) break i;
} else null;
if (reuse) |id| {
const pane = p.panes[id].?;
@@ -558,13 +560,15 @@ fn runCommand(p: *Pardes, from: usize, line: []const u8) ?usize {
pane.command = owned;
pane.command_done = false;
pane.command_status = null;
+ pane.command_pty = true;
pane.body.mode = .tty;
// What the last program left the emulator in goes first: the
// alternate screen left (only if it is there: leaving restores a
// saved cursor), mouse reports and bracketed paste off, the cursor
- // shown, then a soft reset (DECSTR) for the rest.
+ // shown, colours reset. (Not DECSTR: ghostty's stream does not
+ // implement it.)
if (panes.Terminal.onAlternateScreen(pane)) panes.Terminal.feedOutput(p, pane, "\x1b[?1049l");
- panes.Terminal.feedOutput(p, pane, "\x1b[?1000l\x1b[?1002l\x1b[?1003l\x1b[?1006l\x1b[?2004l\x1b[?25h\x1b[!p");
+ panes.Terminal.feedOutput(p, pane, "\x1b[?1000l\x1b[?1002l\x1b[?1003l\x1b[?1006l\x1b[?2004l\x1b[?25h\x1b[0m");
echoCommand(p, pane, line);
p.emit(.{ .spawn = .{ .pane = @intCast(id), .serial = pane.serial, .cwd = .from(pane.cwdSlice()) } });
noteRun(p, pane, "run", line);
diff --git a/src/gui/gui.zig b/src/gui/gui.zig
index 46bd5ffc..0cfe80f5 100644
--- a/src/gui/gui.zig
+++ b/src/gui/gui.zig
@@ -3878,29 +3878,20 @@ const Shell = struct {
break :vt v;
};
- /// Each watched child that exited: reaped, the core told, and its pty
- /// closed if its end of file came first.
+ /// The command panes' exits, told once their output is in (host_io).
fn takeExits(s: *Shell) void {
- while (host_io.takeExited()) |pid| for (s.ptys) |*slot| {
- const pt = if (slot.*) |*pt| pt else continue;
- if (pt.pid != pid or pt.cmd.exited) continue;
- pt.cmd.exit((host_io.reapExited(pid) orelse break).status);
- pt.pid = 0; // reaped: no signal or retire may reach whoever gets it next
- break;
- };
- for (s.ptys, 0..) |*slot, id| {
- const pt = if (slot.*) |*pt| pt else continue;
- if (!pt.cmd.due()) continue;
- pt.cmd.told = true;
- s.core.update(.{ .exited = .{ .pane = @intCast(id), .status = pt.cmd.status } });
- if (pt.cmd.eof) s.closePty(@intCast(id));
- s.saw_event = true;
- }
+ host_io.takeExits(s.core, s.ptys, s, closeWatched);
+ }
+
+ fn closeWatched(s: *Shell, id: usize) void {
+ s.closePty(@intCast(id));
+ s.saw_event = true;
}
fn drainQueue(s: *Shell) void {
s.reconcilePtys();
- s.takeExits();
+ // After this batch's output, which an exit is told behind.
+ defer s.takeExits();
var msgs = s.queue.take();
var check_files = false;
for (msgs.slice()) |m| switch (m) {
@@ -3928,9 +3919,7 @@ const Shell = struct {
// closing it would hang up one that runs on without it.
// Its exit, if it came first, is told now its output is in.
if (pt.cmd.watched) {
- pt.cmd.eof = true;
- s.core.update(.{ .eof = .{ .pane = e.pane } });
- s.takeExits();
+ host_io.commandEof(s.core, s.ptys, e.pane, s, closeWatched);
break :eof;
}
// Unwatched, a command's exit is read here, as its end.
@@ -4218,7 +4207,7 @@ fn spawnPane(ctx: ?*anyopaque, pane: u8, cwd: []const u8) void {
s.gens[pane] +%= 1;
const child = host_io.forkShell(s.core, pane, s.prompt_rcs, s.core.shellBin(), cwd, s.core.screen_h, s.core.screen_w, s.fs) catch |err| return s.core.reportError(pane, "shell", err);
const command = s.core.panes[pane].?.command != null;
- const pt: Pty = .{ .fd = child.file.handle, .pid = child.pid, .serial = s.core.panes[pane].?.serial, .cmd = .{ .watched = command and host_io.watchExit(child.pid) } };
+ const pt: Pty = .{ .fd = child.file.handle, .pid = child.pid, .serial = s.core.panes[pane].?.serial, .cmd = .{ .watched = command and host_io.watchExit(child.pid), .fd = child.file.handle } };
s.ptys[pane] = pt;
var lbuf: [pardes.memory.limits.host_path_cap + 1]u8 = undefined;
if (host_io.shellCwd(pt.pid, &lbuf)) |wd| s.core.setCwd(pane, wd);
diff --git a/src/host_io.zig b/src/host_io.zig
index 68d35a9c..340513df 100644
--- a/src/host_io.zig
+++ b/src/host_io.zig
@@ -1426,12 +1426,6 @@ fn watchChild(pid: libc.pid_t) void {
_ = libc.nanosleep(&ts, null);
}
wakeForExit();
- // Once more a little later: a job the command left holding its pty
- // may keep its end of file from ever coming, and the host tells the
- // exit then (`CommandWatch.due`).
- const ts: libc.timespec = .{ .sec = 0, .nsec = (CommandWatch.grace_ms + 10) * std.time.ns_per_ms };
- _ = libc.nanosleep(&ts, null);
- wakeForExit();
}
fn wakeForExit() void {
@@ -1440,33 +1434,85 @@ fn wakeForExit() void {
if (exit_wake) |wake| wake.f(wake.ctx);
}
-/// Where a host's command pane is between its child's exit and its pty's
-/// end of file. The exit is told once the output before it has been read,
-/// at end of file -- the exit is often seen first, with output still in
-/// the pty -- or after `grace_ms` without one, a job the command left in
-/// the background holding the pty.
+/// Where a host's command pane is between its child's exit and the end of
+/// its output. The exit is told once the output before it is in: at the
+/// pty's end of file; or, when something else still holds the pty (a job
+/// the command left in the background), once nothing is waiting to be read
+/// -- checked when the exit is seen and again after each chunk of output,
+/// with no timer to miss. acme's waitthread tells an exit when it is
+/// reaped (acme.c:587-700); a terminal also has output in flight.
pub const CommandWatch = struct {
- pub const grace_ms = 50;
watched: bool = false,
+ /// The master, to ask whether output is still waiting.
+ fd: c_int = -1,
eof: bool = false,
exited: bool = false,
told: bool = false,
status: ?u8 = null,
- at: i64 = 0,
-
- /// The child is reaped, with this status.
- pub fn exit(w: *CommandWatch, status: ?u8) void {
- w.exited = true;
- w.status = status;
- w.at = nowMs();
- }
/// Whether the exit is to be told now.
pub fn due(w: *const CommandWatch) bool {
- return w.exited and !w.told and (w.eof or nowMs() - w.at >= grace_ms);
+ if (!w.exited or w.told) return false;
+ if (w.eof) return true;
+ var pfd = [1]libc.pollfd{.{ .fd = w.fd, .events = libc.POLL.IN, .revents = 0 }};
+ if (libc.poll(&pfd, 1, 0) < 0) return true;
+ // Every holder of its terminal gone: the end of file comes, after
+ // the rest of the output.
+ if (pfd[0].revents & libc.POLL.HUP != 0) return false;
+ return pfd[0].revents & libc.POLL.IN == 0;
}
};
+/// A host's pty slot, whichever way it keeps it: an optional, or one whose
+/// `fd` is -1 when empty.
+fn SlotPty(comptime S: type) type {
+ return switch (@typeInfo(S)) {
+ .optional => |o| *o.child,
+ else => *S,
+ };
+}
+
+fn slotPty(slot: anytype) ?SlotPty(@TypeOf(slot.*)) {
+ return switch (@typeInfo(@TypeOf(slot.*))) {
+ .optional => if (slot.*) |*pt| pt else null,
+ else => if (slot.fd < 0) null else slot,
+ };
+}
+
+/// Each watched child that exited: reaped, and the core told once its
+/// output is in, its pty closed (`close(ctx, id)`) if its end of file came
+/// first. Every host runs this after an exit's wake and after each chunk
+/// of a command's output; `ptys` is its slot array, each slot with a `pid`
+/// and a `cmd`.
+pub fn takeExits(core: *pardes.Pardes, ptys: anytype, ctx: anytype, comptime close: anytype) void {
+ while (takeExited()) |pid| for (ptys) |*slot| {
+ const pt = slotPty(slot) orelse continue;
+ if (!pt.cmd.watched or pt.pid != pid or pt.cmd.exited) continue;
+ pt.cmd.status = (reapExited(pid) orelse break).status;
+ pt.cmd.exited = true;
+ pt.pid = 0; // reaped: no signal or retire may reach whoever gets it next
+ break;
+ };
+ for (ptys, 0..) |*slot, id| {
+ const pt = slotPty(slot) orelse continue;
+ if (!pt.cmd.watched or !pt.cmd.due()) continue;
+ pt.cmd.told = true;
+ const eof = pt.cmd.eof;
+ core.update(.{ .exited = .{ .pane = @intCast(id), .status = pt.cmd.status } });
+ if (eof) close(ctx, id);
+ }
+}
+
+/// A watched command's pty reached end of file: the core hears its output
+/// is over; the pty is closed now if its exit was told, else when it is.
+pub fn commandEof(core: *pardes.Pardes, ptys: anytype, id: usize, ctx: anytype, comptime close: anytype) void {
+ const pt = slotPty(&ptys[id]) orelse return;
+ pt.cmd.eof = true;
+ core.update(.{ .eof = .{ .pane = @intCast(id) } });
+ if (pt.cmd.told) return close(ctx, id);
+ takeExits(core, ptys, ctx, close);
+}
+
/// Reaps `pid` if it has exited: its status (null: unknown, or not ours
/// to read), or null when it is still running -- a pid a watcher reported
/// may since have been reaped by another and taken by a new child.
diff --git a/src/macos.zig b/src/macos.zig
index d6ceb535..70469618 100644
--- a/src/macos.zig
+++ b/src/macos.zig
@@ -132,31 +132,22 @@ const Pty = struct {
};
/// A watched child exited: wake the host, which takes it (`takeExits`).
+/// Called on a watcher thread holding host_io's exit lock, which
+/// pardes_deinit takes to clear the wake: safe only because the runtime's
+/// wakeup never waits for the main thread (AppDelegate's is a
+/// DispatchQueue.main.async); one that did would deadlock the quit.
fn wakeForExit(ctx: ?*anyopaque) void {
const st: *State = @ptrCast(@alignCast(ctx orelse return));
wake(st);
}
-/// Each watched child that exited: reaped, the core told, and its pty
-/// closed if its end of file came first.
-fn takeExits(st: *State) bool {
- var did = false;
- while (host_io.takeExited()) |pid| for (&st.ptys) |*slot| {
- const pt = if (slot.*) |*pt| pt else continue;
- if (pt.pid != pid or pt.cmd.exited) continue;
- pt.cmd.exit((host_io.reapExited(pid) orelse break).status);
- pt.pid = 0; // reaped: no signal or retire may reach whoever gets it next
- break;
- };
- for (&st.ptys, 0..) |*slot, id| {
- const pt = if (slot.*) |*pt| pt else continue;
- if (!pt.cmd.due()) continue;
- pt.cmd.told = true;
- st.core.update(.{ .exited = .{ .pane = @intCast(id), .status = pt.cmd.status } });
- if (pt.cmd.eof) reap(st, @intCast(id));
- did = true;
- }
- return did;
+/// The command panes' exits, told once their output is in (host_io).
+fn takeExits(st: *State) void {
+ host_io.takeExits(st.core, &st.ptys, st, closeWatched);
+}
+
+fn closeWatched(st: *State, id: usize) void {
+ reap(st, @intCast(id));
}
const WatchedFile = struct {
@@ -1302,7 +1293,9 @@ export fn pardes_watch_changed(pane: u8, generation: u32) void {
fn drainInbox(st: *State) bool {
var batch = st.inbox.take(st.io);
- var did = takeExits(st) or batch.len > 0;
+ // After this batch's output, which an exit is told behind.
+ defer takeExits(st);
+ var did = batch.len > 0;
for (batch.slice()) |msg| {
defer msg.free(st.gpa);
switch (msg) {
@@ -1318,9 +1311,7 @@ fn drainInbox(st: *State) bool {
// closing it would hang up one that runs on without it.
// Its exit, if it came first, is told now its output is in.
if (pt.cmd.watched) {
- pt.cmd.eof = true;
- st.core.update(.{ .eof = .{ .pane = e.pane } });
- _ = takeExits(st);
+ host_io.commandEof(st.core, &st.ptys, e.pane, st, closeWatched);
continue;
}
// Unwatched, a command's exit is read here, as its end.
@@ -2460,7 +2451,7 @@ fn spawnShell(ctx: ?*anyopaque, pane: u8, cwd: []const u8) void {
.pid = child.pid,
.gen = gen,
.reader = .{ .any_future = null, .result = {} },
- .cmd = .{ .watched = (if (core.panes[pane]) |pn| pn.command != null else false) and host_io.watchExit(child.pid) },
+ .cmd = .{ .watched = (if (core.panes[pane]) |pn| pn.command != null else false) and host_io.watchExit(child.pid), .fd = child.file.handle },
};
var lbuf: [1024]u8 = undefined;
if (host_io.shellCwd(child.pid, &lbuf)) |wd| core.setCwd(pane, wd);
diff --git a/src/panes.zig b/src/panes.zig
index 9234912f..29fe0cb0 100644
--- a/src/panes.zig
+++ b/src/panes.zig
@@ -113,6 +113,9 @@ pub const Pane = struct {
/// shown `exit ?`).
command_done: bool = false,
command_status: ?u8 = null,
+ /// Its pty is still open: a job the command left in the background may
+ /// be printing to it, and a reuse would hang it up.
+ command_pty: bool = false,
/// The shell a terminal runs when it is not the configured one (`Tty
/// fish`), owned.
shell: ?[]u8 = null,
diff --git a/src/pardes.zig b/src/pardes.zig
index 9bf1c5f4..64c05fff 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -1632,10 +1632,16 @@ test "a command pane shows how its command ended, and the next command there run
try std.testing.expect(other != dst);
while (p.nextEffect()) |_| {}
p.update(.{ .output = .{ .pane = @intCast(dst), .bytes = "compiled\r\n" } });
- // Its output ending is not its end: that is its child's exit.
- p.update(.{ .eof = .{ .pane = @intCast(dst) } });
- try std.testing.expect(p.panes[dst] == pane and !pane.command_done);
+ // Its exit comes first, a job it left still printing: done, and not
+ // the next command's until its pty closes.
p.update(.{ .exited = .{ .pane = @intCast(dst), .status = 2 } });
+ try std.testing.expect(pane.command_done and pane.command_pty);
+ const busy = exec.execute(p, 1, "true") orelse return error.NoCommandPane;
+ try std.testing.expect(busy != dst);
+ while (p.nextEffect()) |_| {}
+ // Its output ending: now it may be reused.
+ p.update(.{ .eof = .{ .pane = @intCast(dst) } });
+ try std.testing.expect(p.panes[dst] == pane and !pane.command_pty);
try std.testing.expect(p.panes[dst] == pane);
try std.testing.expect(pane.command_done);
try std.testing.expect(std.mem.endsWith(u8, try tagline.tagPrefix(p, pane), "(make -j8) exit 2"));
@@ -4536,6 +4542,7 @@ pub const Pardes = struct {
errdefer p.gpa.free(owned);
const pane = try panes.Terminal.create(p.gpa, p.screen_w, p.screen_h);
pane.command = owned;
+ pane.command_pty = true;
pane.body.mode = .tty;
// Its directory is the one it was run for, and says which of the
// directory's commands reuse it; the child's own cd does not move it.
@@ -5118,6 +5125,7 @@ pub const Pardes = struct {
},
.eof => |e| if (p.panes[e.pane]) |pane| if (pane.command != null) {
// Output is over; the command is over when its child exits.
+ pane.command_pty = false;
} else p.removePane(e.pane, null) catch |err| {
pane.body.mode = .normal;
p.reportError(e.pane, "terminal exited; Del retries close", err);
diff --git a/src/tty/tty.zig b/src/tty/tty.zig
index 14417cd0..f8f8cdc5 100644
--- a/src/tty/tty.zig
+++ b/src/tty/tty.zig
@@ -808,7 +808,6 @@ fn localSession(
frames: while (!core.quit) {
pardes.turn.restoreSettled();
try core.pump(host);
- sh.takeExits();
if (core.takeRestore()) |rp| blk: {
const bytes = filesystem.readRestore(gpa, rp, core.settings.dump_dir.get()) catch |err| {
core.reportError(core.active, "Restore", err);
@@ -988,6 +987,9 @@ const Shell = struct {
batch += 1;
}
if (motion) |m| _ = s.apply(m);
+ // An exit's wake (a .nop) or output an exit waited behind: told
+ // here, inside the step, so the frame after it shows it.
+ s.takeExits();
s.reloadWatched();
}
@@ -1015,6 +1017,8 @@ const Shell = struct {
if (s.gens[pr.id] == pr.gen)
core.update(.{ .output = .{ .pane = @intCast(pr.id), .bytes = pr.bytes } });
s.gpa.free(pr.bytes);
+ // An exit waiting behind this output may be told now.
+ s.takeExits();
return true;
},
.pty_eof => |e| if (s.gens[e.id] == e.gen) {
@@ -1024,9 +1028,7 @@ const Shell = struct {
// closing it would hang up one that runs on without it.
// Its exit, if it came first, is told now its output is in.
if (pt.cmd.watched) {
- pt.cmd.eof = true;
- core.update(.{ .eof = .{ .pane = @intCast(e.id) } });
- s.takeExits();
+ host_io.commandEof(core, &s.ptys, e.id, s, closeWatched);
return true;
}
_ = libc.close(pt.file.handle);
@@ -1225,7 +1227,7 @@ const Shell = struct {
s.gens[pane] +%= 1;
const child = host_io.forkShell(s.core, pane, s.prompt_rcs, s.core.shellBin(), cwd, s.core.screen_h, s.core.screen_w, s.fs) catch |err| return s.core.reportError(pane, "shell", err);
const command = if (s.core.panes[pane]) |pn| pn.command != null else false;
- s.ptys[pane] = .{ .file = child.file, .pid = child.pid, .reader = .{ .any_future = null, .result = {} }, .cmd = .{ .watched = command and host_io.watchExit(child.pid) } };
+ s.ptys[pane] = .{ .file = child.file, .pid = child.pid, .reader = .{ .any_future = null, .result = {} }, .cmd = .{ .watched = command and host_io.watchExit(child.pid), .fd = child.file.handle } };
var lbuf: [pardes.memory.limits.host_path_cap + 1]u8 = undefined;
if (host_io.shellCwd(child.pid, &lbuf)) |wd| s.core.setCwd(pane, wd);
if (s.threads_ok) {
@@ -1274,26 +1276,15 @@ const Shell = struct {
return host_io.ttyTaken(pt.pid, pt.file.handle);
}
- /// Each watched child that exited: reaped, the core told, and its pty
- /// closed if its end of file came first.
+ /// The command panes' exits, told once their output is in (host_io).
fn takeExits(s: *@This()) void {
- while (host_io.takeExited()) |pid| for (&s.ptys) |*slot| {
- const pt = if (slot.*) |*pt| pt else continue;
- if (pt.pid != pid or pt.cmd.exited) continue;
- pt.cmd.exit((host_io.reapExited(pid) orelse break).status);
- pt.pid = 0; // reaped: no signal or retire may reach whoever gets it next
- break;
- };
- for (&s.ptys, 0..) |*slot, id| {
- const pt = if (slot.*) |*pt| pt else continue;
- if (!pt.cmd.due()) continue;
- pt.cmd.told = true;
- s.core.update(.{ .exited = .{ .pane = @intCast(id), .status = pt.cmd.status } });
- if (pt.cmd.eof) {
- _ = libc.close(pt.file.handle);
- slot.* = null;
- }
- }
+ host_io.takeExits(s.core, &s.ptys, s, closeWatched);
+ }
+
+ fn closeWatched(s: *@This(), id: usize) void {
+ const pt = &(s.ptys[id] orelse return);
+ _ = libc.close(pt.file.handle);
+ s.ptys[id] = null;
}
fn killJob(ctx: ?*anyopaque, pane: u8) bool {
generated by cgit v1.3 (git 2.53.0) at 2026-10-02 05:30:14 +0000