vis: re-open /dev/tty read-writeable

libtermkey's initialization routine tries to write to the underlying
file descriptor which fails with EBADF if it is opened read only.
This was a problem in the terminal restore code called after a shell
command is executed.

It should fix the following:

 $ echo foo | vis - > bar
 :!/bin/sh
 exit

where before vis would no longer accept any input.

1 files changed, 1 insertions, 1 deletions

diff --git a/main.c b/main.c
index 1b6f14d..7bab3cd 100644
--- a/main.c
+++ b/main.c
@@ -2280,7 +2280,7 @@ int main(int argc, char *argv[]) {
 				if (len == -1)
 					vis_die(vis, "Can not read from stdin\n");
 				text_snapshot(txt);
-				int fd = open("/dev/tty", O_RDONLY);
+				int fd = open("/dev/tty", O_RDWR);
 				if (fd == -1)
 					vis_die(vis, "Can not reopen stdin\n");
 				dup2(fd, STDIN_FILENO);