Merge from gnulib

* lib/getdtablesize.c, m4/dup2.m4, m4/fcntl.m4:
Update from gnulib, incorporating:
2015-02-23 dup2: doc and test for Android bug
2015-02-23 Replace dup2() on Android
2015-02-22 Android doesn't define RLIM_SAVED_*

4 files changed, 33 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 41bff0ef30a..47ef578fb7c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2015-02-25  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Merge from gnulib
+        * lib/getdtablesize.c, m4/dup2.m4, m4/fcntl.m4:
+        Update from gnulib, incorporating:
+        2015-02-23 dup2: doc and test for Android bug
+        2015-02-23 Replace dup2() on Android
+        2015-02-22 Android doesn't define RLIM_SAVED_*
+
 2015-02-21  Paul Eggert  <eggert@cs.ucla.edu>
 
         Merge from gnulib
diff --git a/lib/getdtablesize.c b/lib/getdtablesize.c
index bad45f7e32f..03eb7ef1bff 100644
--- a/lib/getdtablesize.c
+++ b/lib/getdtablesize.c
@@ -89,6 +89,13 @@ getdtablesize (void)
 # include <limits.h>
 # include <sys/resource.h>
 
+# ifndef RLIM_SAVED_CUR
+#  define RLIM_SAVED_CUR RLIM_INFINITY
+# endif
+# ifndef RLIM_SAVED_MAX
+#  define RLIM_SAVED_MAX RLIM_INFINITY
+# endif
+
 # ifdef __CYGWIN__
   /* Cygwin 1.7.25 auto-increases the RLIMIT_NOFILE soft limit until it
      hits the compile-time constant hard limit of 3200.  We might as
diff --git a/m4/dup2.m4 b/m4/dup2.m4
index 9aa2ea85ebd..59028e0982c 100644
--- a/m4/dup2.m4
+++ b/m4/dup2.m4
@@ -1,4 +1,4 @@
-#serial 22
+#serial 24
 dnl Copyright (C) 2002, 2005, 2007, 2009-2015 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -25,6 +25,12 @@ AC_DEFUN([gl_FUNC_DUP2],
              #include <limits.h>
              #include <sys/resource.h>
              #include <unistd.h>
+             #ifndef RLIM_SAVED_CUR
+             # define RLIM_SAVED_CUR RLIM_INFINITY
+             #endif
+             #ifndef RLIM_SAVED_MAX
+             # define RLIM_SAVED_MAX RLIM_INFINITY
+             #endif
            ]],
            [[int result = 0;
              int bad_fd = INT_MAX;
@@ -39,7 +45,7 @@ AC_DEFUN([gl_FUNC_DUP2],
                if (fcntl (1, F_SETFD, FD_CLOEXEC) == -1)
                  result |= 1;
              #endif
-             if (dup2 (1, 1) == 0)
+             if (dup2 (1, 1) != 1)
                result |= 2;
              #ifdef FD_CLOEXEC
                if (fcntl (1, F_GETFD) != FD_CLOEXEC)
@@ -70,6 +76,8 @@ AC_DEFUN([gl_FUNC_DUP2],
              gl_cv_func_dup2_works="guessing no" ;;
            haiku*) # on Haiku alpha 2, dup2(1, 1) resets FD_CLOEXEC.
              gl_cv_func_dup2_works="guessing no" ;;
+           *-android*) # implemented using dup3(), which fails if oldfd == newfd
+             gl_cv_func_dup2_works="guessing no" ;;
            *) gl_cv_func_dup2_works="guessing yes" ;;
          esac])
       ])
diff --git a/m4/fcntl.m4 b/m4/fcntl.m4
index 218e78628ba..76dd86711b2 100644
--- a/m4/fcntl.m4
+++ b/m4/fcntl.m4
@@ -1,4 +1,4 @@
-# fcntl.m4 serial 7
+# fcntl.m4 serial 8
 dnl Copyright (C) 2009-2015 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -34,6 +34,12 @@ AC_DEFUN([gl_FUNC_FCNTL],
               #include <limits.h>
               #include <sys/resource.h>
               #include <unistd.h>
+              #ifndef RLIM_SAVED_CUR
+              # define RLIM_SAVED_CUR RLIM_INFINITY
+              #endif
+              #ifndef RLIM_SAVED_MAX
+              # define RLIM_SAVED_MAX RLIM_INFINITY
+              #endif
             ]],
             [[int result = 0;
               int bad_fd = INT_MAX;