WIPnew-build

1 files changed, 171 insertions, 0 deletions

diff --git a/src/lib/openpty.cc b/src/lib/openpty.cc
new file mode 100644
index 00000000..4262832e
--- /dev/null
+++ b/src/lib/openpty.cc
@@ -0,0 +1,171 @@
+/*
+    Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
+    All rights reserved.
+    Copyright (C) 2007-2013, Gabriel Dos Reis.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are
+    met:
+
+        - Redistributions of source code must retain the above copyright
+          notice, this list of conditions and the following disclaimer.
+
+        - Redistributions in binary form must reproduce the above copyright
+         notice, this list of conditions and the following disclaimer in
+          the documentation and/or other materials provided with the
+          distribution.
+
+        - Neither the name of The Numerical ALgorithms Group Ltd. nor the
+          names of its contributors may be used to endorse or promote products
+          derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+    IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+    TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+    PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+
+#ifdef HAVE_SYS_IOCTL_H
+#  include <sys/ioctl.h>
+#endif
+#ifdef HAVE_PTY_H
+#  include <pty.h>
+#endif
+#ifdef HAVE_UTIL_H
+#  include <util.h>
+#endif
+#ifdef HAVE_TERMIOS_H
+#  include <termios.h>
+#endif
+#ifdef HAVE_LIBUTIL_H
+#  include <sys/types.h>
+#  include <libutil.h>
+#endif
+
+
+#include "openpty.h"
+
+#if defined(SUNplatform)
+static void 
+makeNextPtyNames(char *cont,char * serv)
+{
+        static int channelNo = 0;
+        static char group[] = "pqrstuvwxyzPQRST";
+        static int groupNo = 0;
+
+        sprintf(cont, "/dev/pty%c%x", group[groupNo], channelNo);
+        sprintf(serv, "/dev/tty%c%x", group[groupNo], channelNo);
+        channelNo++;                /* try next */
+        if (channelNo == 16) {      /* move to new group */
+                channelNo = 0;
+                groupNo++;
+                if (groupNo == 16) groupNo = 0;        /* recycle */
+                }
+}
+#endif
+
+
+/*
+ * The main function is ptyopen. It simply opens up both sides of a
+ * pseudo-terminal. It uses and saves the pathnames for
+ * the devices which were actually opened.
+ *
+ * If it fails it simply exits the program.
+ *
+ *
+ * ptyopen(controller, server, controllerPath, serverPath) 
+ * int *controller;     The file descriptor for controller side of the pty 
+ * int *server;         The file descriptor for the server side 
+ * char *serverPath;
+ *
+ * The path name  vars should be declared of size 11 or more
+ */
+
+
+int  
+ptyopen(int *controller,int * server,char * serverPath)
+{
+#if HAVE_DECL_OPENPTY
+   return openpty(controller,server, serverPath, NULL, NULL);
+#elif defined(SUNplatform)
+  int looking = 1, i;
+  int oflag = O_RDWR;                  /* flag for opening the pty */
+  char controllerPath[128];
+  
+  for (i = 0; looking && i < 1000; i++) {
+    makeNextPtyNames(controllerPath, serverPath);
+    if (access(controllerPath, 6) != 0) continue;
+    *controller = open(controllerPath, oflag, 0);
+    if (*controller >= 0) {
+      *server = open(serverPath, oflag, 0);
+      if (*server > 0)
+        looking = 0;
+      else
+        close(*controller);
+    }
+  }
+  if (looking) {
+    fprintf(stderr, "Couldn't find a free pty.\n");
+    exit(-1);
+  }
+  return (*controller);
+#elif defined(SUN4OS5platform)
+extern int grantpt(int);
+extern int unlockpt(int);
+extern char* ptsname(int);
+  int fdm,fds;
+  char *slavename;
+
+  /* open master */
+  if ((fdm = open("/dev/ptmx", O_RDWR)) < 0 )
+    perror("ptyopen: Failed to open /dev/ptmx");
+  else {
+    /* change permission ofslave */
+    if (grantpt(fdm) < 0)
+      perror("ptyopen: Failed to grant access to slave device");
+    /* unlock slave */
+    if (unlockpt(fdm) < 0)
+      perror("ptyopen: Failed to unlock master/slave pair");
+    /* get name of slave */
+    if ((slavename = ptsname(fdm)) == NULL)
+      perror("ptyopen: Failed to get name of slave device");
+    /* open slave */
+    if ((fds = open(slavename, O_RDWR)) < 0 )
+      perror("ptyopen: Failed to open slave");
+    else {
+      /* push ptem */
+      if (ioctl(fds, I_PUSH, "ptem") < 0)
+        perror("ptyopen: Failed to push ptem");
+      /* push ldterm */
+      if (ioctl(fds, I_PUSH, "ldterm") < 0)
+        perror("ptyopen: Failed to push idterm");
+      strcpy(serverPath,slavename);
+      *controller=fdm;
+      *server=fds;
+    }
+  }
+  return(fdm);
+#else
+#  error "don't know how to open a pty"
+#endif
+}
+
+