Support setting pty size in script command

Author: jart

examples/script.c

@@ -49,10 +49,10 @@
  * @fileoverview Terminal Screencast Recorder / Player, e.g.
  *
  *     make o//examples/script.com
- *     o//examples/script.com -r
+ *     o//examples/script.com -w80 -h24 -r recording.tty
  *     # type stuff..
  *     # CTRL-D
- *     o//examples/script.com -p typescript
+ *     o//examples/script.com -p recording.tty
  *
  * @note works on Linux, OpenBSD, NetBSD, FreeBSD, MacOS
  * @see https://asciinema.org/
@@ -103,9 +103,9 @@ main(int argc, char *argv[])
 	fd_set rfd;
 	int fm_fd;
 	int aflg, Fflg, kflg, pflg, ch, k, n;
-	int flushtime, readstdin;
+	int flushtime, readstdin, width, height;
 
-	aflg = Fflg = kflg = pflg = 0;
+	aflg = Fflg = kflg = pflg = height = width = 0;
 	usesleep = 1;
 	rawout = 0;
 	flushtime = 30;
@@ -115,7 +115,7 @@ main(int argc, char *argv[])
 
 	(void)fm_fd;
 
-	while ((ch = getopt(argc, argv, "adeFfkpqrt:")) != -1)
+	while ((ch = getopt(argc, argv, "adeFfkpqrt:w:h:")) != -1)
 		switch(ch) {
 		case 'a':
 			aflg = 1;
@@ -145,6 +145,12 @@ main(int argc, char *argv[])
 			if (flushtime < 0)
 				err(1, "invalid flush time %d", flushtime);
 			break;
+		case 'w':
+			width = atoi(optarg);
+			break;
+		case 'h':
+			height = atoi(optarg);
+			break;
 		case '?':
 		default:
 			usage();
@@ -172,6 +178,10 @@ main(int argc, char *argv[])
 		if (openpty(&master, &slave, NULL, NULL, NULL) == -1)
 			err(1, "openpty");
 	} else {
+		if (width)
+			win.ws_col = width;
+		if (height)
+			win.ws_row = height;
 		if (openpty(&master, &slave, NULL, &tt, &win) == -1)
 			err(1, "openpty");
 		ttyflg = 1;