Refuse to start if the terminal size is reported with 0 dimension

ringtailsoftware · ringtailsoftware · commit 50095d366bc1 · 2024-12-15T21:49:51.000Z
diff --git a/src/main.zig b/src/main.zig
@@ -51,7 +51,7 @@ pub fn raw_mode_start() !void {
 
         var ws: std.posix.winsize = undefined;
         const err = std.posix.system.ioctl(stdin_reader.handle, std.posix.T.IOCGWINSZ, @intFromPtr(&ws));
-        if (std.posix.errno(err) != .SUCCESS) {
+        if (std.posix.errno(err) != .SUCCESS or ws.ws_col == 0 or ws.ws_row == 0) {
             return error.GetTerminalSizeErr;
         }
         term_width = ws.ws_col;

Original file line number	Diff line number	Diff line change
`@@ -51,7 +51,7 @@ pub fn raw_mode_start() !void {`
`51`	`51`
`52`	`52`	`var ws: std.posix.winsize = undefined;`
`53`	`53`	`const err = std.posix.system.ioctl(stdin_reader.handle, std.posix.T.IOCGWINSZ, @intFromPtr(&ws));`
`54`		`- if (std.posix.errno(err) != .SUCCESS) {`
	`54`	`+ if (std.posix.errno(err) != .SUCCESS or ws.ws_col == 0 or ws.ws_row == 0) {`
`55`	`55`	`return error.GetTerminalSizeErr;`
`56`	`56`	`}`
`57`	`57`	`term_width = ws.ws_col;`