3 files changed, 22 insertions, 2 deletions
diff --git a/auto.def b/auto.def
index cf4ba69..e4010ee 100644
--- a/auto.def
+++ b/auto.def
@@ -80,7 +80,7 @@ if {[cc-check-function-in-lib socket socket]} {
 }
 
 cc-check-functions ualarm lstat fork vfork system select execvpe
-cc-check-functions backtrace geteuid mkstemp realpath strptime
+cc-check-functions backtrace geteuid mkstemp realpath strptime isatty
 cc-check-functions regcomp waitpid sigaction sys_signame sys_siglist
 cc-check-functions syslog opendir readlink sleep usleep pipe getaddrinfo utimes
 if {[cc-check-functions sysinfo]} {
@@ -167,7 +167,7 @@ if {[opt-bool ipv6 full]} {
     define JIM_IPV6
 }
 if {[opt-bool lineedit full]} {
-    if {([cc-check-includes termios.h] && [cc-check-functions isatty]) || [have-feature winconsole]} {
+    if {([cc-check-includes termios.h] && [have-feature isatty]) || [have-feature winconsole]} {
         msg-result "Enabling line editing"
         define USE_LINENOISE
         lappend extra_objs linenoise.o
diff --git a/jim-aio.c b/jim-aio.c
index 018ca44..f3cc047 100644
--- a/jim-aio.c
+++ b/jim-aio.c
@@ -511,6 +511,18 @@ static int aio_cmd_puts(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
     return JIM_ERR;
 }
 
+static int aio_cmd_isatty(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+#ifdef HAVE_ISATTY
+    AioFile *af = Jim_CmdPrivData(interp);
+    Jim_SetResultInt(interp, isatty(fileno(af->fp)));
+#else
+    Jim_SetResultInt(interp, 0);
+#endif
+
+    return JIM_OK;
+}
+
 #if !defined(JIM_ANSIC) && !defined(JIM_BOOTSTRAP)
 static int aio_cmd_recvfrom(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
@@ -862,6 +874,13 @@ static const jim_subcmd_type aio_command_table[] = {
         2,
         /* Description: Write the string, with newline unless -nonewline */
     },
+    {   "isatty",
+        NULL,
+        aio_cmd_isatty,
+        0,
+        0,
+        /* Description: Is the file descriptor a tty? */
+    },
 #if !defined(JIM_ANSIC) && !defined(JIM_BOOTSTRAP)
     {   "recvfrom",
         "len ?addrvar?",
diff --git a/make-bootstrap-jim b/make-bootstrap-jim
index 5af4acf..707d888 100755
--- a/make-bootstrap-jim
+++ b/make-bootstrap-jim
@@ -80,6 +80,7 @@ cat <<EOF
 #define TCL_PLATFORM_PATH_SEPARATOR ":"
 #define HAVE_VFORK
 #define HAVE_WAITPID
+#define HAVE_ISATTY
 #define HAVE_SYS_TIME_H
 #define HAVE_DIRENT_H
 #define HAVE_UNISTD_H