# HG changeset patch
# User Olaf Wintermann <olaf.wintermann@gmail.com>
# Date 1628528462 -7200
# Node ID 1c75c0498520f6c89de8dd3abfe48cf77832b5bc
# Parent  40be8db6fe4586563169c89f81f41bef2e6357b7
use tcsetattr only if stdin is a tty

diff -r 40be8db6fe45 -r 1c75c0498520 libidav/utils.c
--- a/libidav/utils.c	Mon Aug 09 17:22:21 2021 +0200
+++ b/libidav/utils.c	Mon Aug 09 19:01:02 2021 +0200
@@ -1084,13 +1084,16 @@
 #ifndef _WIN32
     // hide terminal input
     struct termios oflags, nflags;
-    tcgetattr(fileno(stdin), &oflags);
-    nflags = oflags;
-    nflags.c_lflag &= ~ECHO;
-    nflags.c_lflag |= ECHONL;
-    if (tcsetattr(fileno(stdin), TCSANOW, &nflags) != 0) {
-        perror("tcsetattr");
+    if(isatty(fileno(stdin))) {
+        tcgetattr(fileno(stdin), &oflags);
+        nflags = oflags;
+        nflags.c_lflag &= ~ECHO;
+        nflags.c_lflag |= ECHONL;
+        if (tcsetattr(fileno(stdin), TCSANOW, &nflags) != 0) {
+            perror("tcsetattr");
+        }
     }
+    
 #endif
     
     // read password input
@@ -1107,7 +1110,7 @@
     
 #ifndef _WIN32
     // restore terminal settings
-    if (tcsetattr(fileno(stdin), TCSANOW, &oflags) != 0) {
+    if (isatty(fileno(stdin)) && tcsetattr(fileno(stdin), TCSANOW, &oflags) != 0) {
         perror("tcsetattr");
     }
 #endif