finally working: code to read characters from terminal

1 files changed, 15 insertions, 7 deletions

diff --git a/read-character-from-terminal.bash b/read-character-from-terminal.bash
index 373900c..6abd2b6 100755
--- a/read-character-from-terminal.bash
+++ b/read-character-from-terminal.bash
@@ -66,9 +66,9 @@ readchar_SIGCONT()
         if check_foreground
         then
                 x cfmakeraw "${readchar_termopts[@]}"
-                x kill -CONT $SOCAT_PID
+                x kill -CONT $SOCAT_PID 2>/dev/null
         else
-                x kill -STOP $BASHPID $SOCAT_PID
+                x kill -STOP $BASHPID $SOCAT_PID 2>/dev/null
         fi
 }
 
@@ -82,17 +82,20 @@ readchar()
 {
         declare -n REPLY="${1:-CHARACTER}"
 
+        if ! check_foreground
+        then
+                sleep .25
+                return
+        fi
+
         if ! [ "$SOCAT_PID" ] || ! kill -CONT "$SOCAT_PID" 2>/dev/null
         then
                 x cfmakeraw "${readchar_termopts[@]}"
                 exec {SOCAT}< <(trap 'sleep .25' SIGTSTP; socat - -)
-
-                # READ_PID=$BASHPID
-                # exec {SOCAT}< <(trap 'kill -TSTP $READ_PID; kill -STOP $BASHPID' SIGTSTP; exec cat)
                 SOCAT_PID=$!
         fi
 
-        if check_foreground && read -t .25 -n1 -d '' -r -s -u "$SOCAT"
+        if read -n1 -d '' -r -s -u "$SOCAT"
         then
                 if [ "$t" ]
                 then
@@ -151,7 +154,12 @@ read_chars()
 reader_process()
 {
         enable -f sleep sleep
-        read_chars
+        if [ "$SHLVL" = 1 -a -t 1 ]
+        then
+                (read_chars)
+        else
+                read_chars
+        fi
 }
 
 run_test()