2 files changed, 123 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/grantpt.c b/gnulib/lib/grantpt.c
new file mode 100644
index 0000000..b757044
--- /dev/null
+++ b/gnulib/lib/grantpt.c
@@ -0,0 +1,123 @@
+/* Acquire ownership of the slave side of a pseudo-terminal.
+   Copyright (C) 1998-2002, 2009-2011 Free Software Foundation, Inc.
+   Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <stdlib.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#if HAVE_SETRLIMIT
+# include <sys/types.h>
+# include <sys/time.h>
+# include <sys/resource.h>
+#endif
+
+#include "configmake.h"
+#include "pty-private.h"
+
+#ifndef _LIBC
+# define __builtin_expect(expr,val) (expr)
+# define __set_errno(e) errno = (e)
+# define __dup2 dup2
+# define __fork fork
+# define __setrlimit setrlimit
+# define __waitpid waitpid
+#endif
+
+int
+grantpt (int fd)
+{
+#if defined __OpenBSD__
+  /* On OpenBSD, master and slave of a pseudo-terminal are allocated together,
+     through an ioctl on /dev/ptm.  There is no need for grantpt().  */
+  if (fcntl (fd, F_GETFD) < 0)
+    return -1;
+  return 0;
+#else
+  /* This function is most often called from a process without 'root'
+     credentials.  Use the helper program.  */
+  int retval = -1;
+  pid_t pid = __fork ();
+  if (pid == -1)
+    goto cleanup;
+  else if (pid == 0)
+    {
+      /* This is executed in the child process.  */
+
+# if HAVE_SETRLIMIT && defined RLIMIT_CORE
+      /* Disable core dumps.  */
+      struct rlimit rl = { 0, 0 };
+      __setrlimit (RLIMIT_CORE, &rl);
+# endif
+
+      /* We pass the master pseudo terminal as file descriptor PTY_FILENO.  */
+      if (fd != PTY_FILENO)
+        if (__dup2 (fd, PTY_FILENO) < 0)
+          _exit (FAIL_EBADF);
+
+# ifdef CLOSE_ALL_FDS
+      CLOSE_ALL_FDS ();
+# endif
+
+      execle (_PATH_PT_CHOWN, strrchr (_PATH_PT_CHOWN, '/') + 1, NULL, NULL);
+      _exit (FAIL_EXEC);
+    }
+  else
+    {
+      int w;
+
+      if (__waitpid (pid, &w, 0) == -1)
+        goto cleanup;
+      if (!WIFEXITED (w))
+        __set_errno (ENOEXEC);
+      else
+        switch (WEXITSTATUS (w))
+          {
+          case 0:
+            retval = 0;
+            break;
+          case FAIL_EBADF:
+            __set_errno (EBADF);
+            break;
+          case FAIL_EINVAL:
+            __set_errno (EINVAL);
+            break;
+          case FAIL_EACCES:
+            __set_errno (EACCES);
+            break;
+          case FAIL_EXEC:
+            __set_errno (ENOEXEC);
+            break;
+          case FAIL_ENOMEM:
+            __set_errno (ENOMEM);
+            break;
+
+          default:
+            assert(! "getpt: internal error: invalid exit code from pt_chown");
+          }
+    }
+
+ cleanup:
+  return retval;
+#endif
+}