Add support of posix_openpt(2) to open master pseudo terminal device

Signed-off-by: OBATA Akio <obache@wizdas.com>
(cherry picked from commit 8e542575e0)

CMakeLists.txt

@@ -418,6 +418,7 @@ check_function_exists( strcasecmp HAVE_STRCASECMP )
 check_function_exists( strchr HAVE_STRCHR )
 check_function_exists( strcmp HAVE_STRCMP )
 check_function_exists( strrchr HAVE_STRRCHR )
+check_function_exists( posix_openpt HAVE_POSIX_OPENPT )
 check_function_exists( ptsname HAVE_PTSNAME )
 check_function_exists( unlockpt HAVE_UNLOCKPT )
 check_function_exists( _getpty HAVE__GETPTY )

config.h.cmake

@@ -437,6 +437,9 @@
 /* Define to 1 if you have the `poll' function. */
 #cmakedefine HAVE_POLL 1
 
+/* Define to 1 if you have the `posix_openpt' function. */
+#cmakedefine HAVE_POSIX_OPENPT 1
+
 /* Define to 1 if the assembler supports AltiVec instructions. */
 #undef HAVE_PPC_ALTIVEC
 

tdecore/kpty.cpp

@@ -329,7 +329,11 @@ bool KPty::open()
   // We try, as we know them, one by one.
 
 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
-#ifdef _AIX
+#if defined(HAVE_GETPT)
+  d->masterFd = ::getpt();
+#elif defined(HAVE_POSIX_OPENPT)
+  d->masterFd = ::posix_openpt(O_RDWR);
+#elif defined(_AIX)
   d->masterFd = ::open("/dev/ptc",O_RDWR);
 #else
   d->masterFd = ::open("/dev/ptmx",O_RDWR);

tdersync/tdersync.cpp

@@ -97,6 +97,8 @@ Reference Manual for Version 2.2.x of the GNU C Library */
 
 #ifdef HAVE_GETPT
     master = getpt();
+#elif defined(HAVE_POSIX_OPENTPT)
+    master = posix_openpt(O_RDWR);
 #else
     master = open("/dev/ptmx", O_RDWR);
 #endif

tdesu/tdesu_pty.cpp

@@ -94,10 +94,14 @@ PTY::~PTY()
 int PTY::getpt()
 {
 
-#if defined(HAVE_GETPT) && defined(HAVE_PTSNAME)
+#if (defined(HAVE_GETPT) || defined(HAVE_POSIX_OPENPT)) && defined(HAVE_PTSNAME)
 
     // 1: UNIX98: preferred way
+#ifdef HAVE_GETPT
     ptyfd = ::getpt();
+#elif defined(HAVE_POSIX_OPENPT)
+    ptyfd = ::posix_openpt(O_RDWR);
+#endif
     ttyname = ::ptsname(ptyfd);
     return ptyfd;