Assume termios.h is available on all non Windows platforms

Checking for something that is available on all (non Windows) platforms
is not very useful. So just always use termios.h

Change-Id: I09b055f15e35614eab112ff69166c6985f8770da
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1967
Message-Id: <20261003132620.12292-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg39661.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

Author: schwabe

configure.ac

@@ -459,7 +459,7 @@ AC_CHECK_HEADERS([ \
 	sys/time.h sys/ioctl.h sys/stat.h \
 	sys/mman.h sys/file.h sys/wait.h \
 	libgen.h stropts.h \
-	syslog.h pwd.h grp.h termios.h \
+	syslog.h pwd.h grp.h \
 	sys/sockio.h sys/uio.h \
 	poll.h sys/epoll.h err.h \
 ])

src/openvpn/console_builtin.c

@@ -37,7 +37,7 @@
 #include "buffer.h"
 #include "misc.h"
 
-#ifdef HAVE_TERMIOS_H
+#ifndef _WIN32
 #include <termios.h>
 #endif
 
@@ -133,10 +133,7 @@ get_console_input_win32(const char *prompt, const bool echo, char *input, const
     return false;
 }
 
-#endif /* _WIN32 */
-
-
-#ifdef HAVE_TERMIOS_H
+#else
 
 /**
  * Open the current console TTY for read/write operations
@@ -175,7 +172,7 @@ close_tty(FILE *fp)
     }
 }
 
-#endif /* HAVE_TERMIOS_H */
+#endif
 
 
 /**
@@ -196,10 +193,8 @@ get_console_input(const char *prompt, const bool echo, char *input, const int ca
     ASSERT(capacity > 0);
     input[0] = '\0';
 
-#if defined(_WIN32)
+#ifdef _WIN32
     return get_console_input_win32(prompt, echo, input, capacity);
-#elif !defined(HAVE_TERMIOS_H)
-    msg(M_FATAL, "Sorry, but I can't get console input on this OS (%s)", prompt);
 #else
     bool restore_tty = false;
     bool ret = false;
@@ -260,7 +255,7 @@ get_console_input(const char *prompt, const bool echo, char *input, const int ca
 
     close_tty(fp);
     return ret;
-#endif /* if defined(_WIN32) */
+#endif
 }
 
 /**