chore: upgrade libghostty and preserve terminal behavior (#3906)

1 files changed, 83 insertions, 0 deletions

diff --git a/vendor/libghostty-vt/src/lib/compat/fd.zig b/vendor/libghostty-vt/src/lib/compat/fd.zig
new file mode 100644
index 00000000..3bef7414
--- /dev/null
+++ b/vendor/libghostty-vt/src/lib/compat/fd.zig
@@ -0,0 +1,83 @@
+//! Code taken from 0.15.2 and `std.fs.file`. See README.md for license and
+//! details.
+const std = @import("std");
+
+pub const PipeError = error{
+    SystemFdQuotaExceeded,
+    ProcessFdQuotaExceeded,
+} || std.posix.UnexpectedError;
+
+pub fn close(fd: std.posix.fd_t) void {
+    switch (std.posix.errno(std.posix.system.close(fd))) {
+        .BADF => unreachable, // Always a race condition
+        else => {}, // Includes EINTR, see std.posix source in 0.15.2
+    }
+}
+
+pub fn pipe() PipeError![2]std.posix.fd_t {
+    var fds: [2]std.posix.fd_t = undefined;
+    switch (std.posix.errno(std.posix.system.pipe(&fds))) {
+        .SUCCESS => return fds,
+        .INVAL => unreachable, // Invalid parameters to pipe()
+        .FAULT => unreachable, // Invalid fds pointer
+        .NFILE => return error.SystemFdQuotaExceeded,
+        .MFILE => return error.ProcessFdQuotaExceeded,
+        else => |err| return std.posix.unexpectedErrno(err),
+    }
+}
+
+pub fn pipe2(flags: std.posix.O) PipeError![2]std.posix.fd_t {
+    if (@TypeOf(std.posix.system.pipe2) != void) {
+        var fds: [2]std.posix.fd_t = undefined;
+        switch (std.posix.errno(std.posix.system.pipe2(&fds, flags))) {
+            .SUCCESS => return fds,
+            .INVAL => unreachable, // Invalid flags
+            .FAULT => unreachable, // Invalid fds pointer
+            .NFILE => return error.SystemFdQuotaExceeded,
+            .MFILE => return error.ProcessFdQuotaExceeded,
+            else => |err| return std.posix.unexpectedErrno(err),
+        }
+    }
+
+    const fds: [2]std.posix.fd_t = try pipe();
+    errdefer {
+        close(fds[0]);
+        close(fds[1]);
+    }
+
+    // https://github.com/ziglang/zig/issues/18882
+    if (@as(u32, @bitCast(flags)) == 0)
+        return fds;
+
+    // CLOEXEC is special, it's a file descriptor flag and must be set using
+    // F.SETFD.
+    if (flags.CLOEXEC) {
+        for (fds) |fd| {
+            switch (std.posix.errno(std.posix.system.fcntl(fd, std.posix.F.SETFD, @as(u32, std.posix.FD_CLOEXEC)))) {
+                .SUCCESS => {},
+                .INVAL => unreachable, // Invalid flags
+                .BADF => unreachable, // Always a race condition
+                else => |err| return std.posix.unexpectedErrno(err),
+            }
+        }
+    }
+
+    const new_flags: u32 = f: {
+        var new_flags = flags;
+        new_flags.CLOEXEC = false;
+        break :f @bitCast(new_flags);
+    };
+    // Set every other flag affecting the file status using F.SETFL.
+    if (new_flags != 0) {
+        for (fds) |fd| {
+            switch (std.posix.errno(std.posix.system.fcntl(fd, std.posix.F.SETFL, new_flags))) {
+                .SUCCESS => {},
+                .INVAL => unreachable, // Invalid flags
+                .BADF => unreachable, // Always a race condition
+                else => |err| return std.posix.unexpectedErrno(err),
+            }
+        }
+    }
+
+    return fds;
+}