From bbd2d5a8fa3ff8265117f23a98111e9b3d53cef0 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Fri, 5 May 2023 02:09:10 -0500
Subject: [PATCH] Shell can test if a fd is open with "2>/dev/null <fd" so
 remove test -T

---
 mkroot/mkroot.sh  | 2 +-
 toys/posix/test.c | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/mkroot/mkroot.sh b/mkroot/mkroot.sh
index 455e5371..de0dc645 100755
--- a/mkroot/mkroot.sh
+++ b/mkroot/mkroot.sh
@@ -106,7 +106,7 @@ export HOME=/home PATH=/bin:/sbin
 
 if ! mountpoint -q dev; then
   mount -t devtmpfs dev dev
-  [ $$ -eq 1 -a ! -T 0 ] && exec 0<>/dev/console 1>&0 2>&1
+  [ $$ -eq 1 ] && ! 2>/dev/null <0 && exec 0<>/dev/console 1>&0 2>&1
   for i in ,fd /0,stdin /1,stdout /2,stderr
   do ln -sf /proc/self/fd${i/,*/} dev/${i/*,/}; done
   mkdir -p dev/shm
diff --git a/toys/posix/test.c b/toys/posix/test.c
index cdb13e2a..f9a2bbbb 100644
--- a/toys/posix/test.c
+++ b/toys/posix/test.c
@@ -28,7 +28,7 @@ config TEST
     STRING is:
       -n  nonzero size   -z  zero size
     FD (integer file descriptor) is:
-      -t  a TTY          -T  open
+      -t  a TTY
 
     --- Tests with one argument on each side of an operator:
     Two strings:
@@ -109,7 +109,6 @@ static int do_test(char **args, int *count)
     } else if (c == 'z') return !*args[1];
     else if (c == 'n') return *args[1];
     else if (c == 't') return isatty(atolx(args[1]));
-    else if (c == 'T') return -1 != fcntl(atolx(args[1]), F_GETFL);
   }
   return *count = 0;
 }
-- 
2.39.2