Merge from gnulib

This incorporates:
2015-06-06 acl-permissions: pacify -Wsuggest-attribute=const
2015-06-05 stdio: Don't redefine gets when using C++
2015-06-05 acl-permissions: port to AIX, C89 HP-UX
2015-06-02 file-has-acl: fix build on Mac OS X 10
2015-06-01 gnulib-tool: concatenate lib_SOURCES to a single line
2015-06-01 pthread_sigmask: discount system version if a simple macro
2015-05-31 readlinkat: avoid OS X 10.10 trailing slash bug
* doc/misc/texinfo.tex, lib/acl-internal.h, lib/get-permissions.c:
* lib/readlinkat.c, lib/set-permissions.c, lib/stdio.in.h:
* m4/acl.m4, m4/pthread_sigmask.m4, m4/readlinkat.m4: Copy from gnulib.
* lib/gnulib.mk: Regenerate.

10 files changed, 136 insertions, 62 deletions

diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index 4b4856469a..1a4741d157 100644
--- a/doc/misc/texinfo.tex
+++ b/doc/misc/texinfo.tex
@@ -3,7 +3,7 @@
 % Load plain if necessary, i.e., if running under initex.
 \expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
 %
-\def\texinfoversion{2015-05-26.15}
+\def\texinfoversion{2015-06-01.15}
 %
 % Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
 % 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
@@ -304,6 +304,7 @@
 % Avoid "undefined control sequence" errors.
 \def\lastchapterdefs{}
 \def\lastsectiondefs{}
+\def\lastsection{}
 \def\prevchapterdefs{}
 \def\prevsectiondefs{}
 \def\lastcolordefs{}
@@ -7607,7 +7608,7 @@ end
 \long\def\nillm@{\nil@}%
 
 % This macro is expanded during the Texinfo macro expansion, not during its
-% definition.  It gets all the arguments values and assigns them to macros
+% definition.  It gets all the arguments' values and assigns them to macros
 % macarg.ARGNAME
 %
 % #1 is the macro name
diff --git a/lib/acl-internal.h b/lib/acl-internal.h
index 11fdea1404..d592a7559f 100644
--- a/lib/acl-internal.h
+++ b/lib/acl-internal.h
@@ -289,6 +289,10 @@ struct permission_context {
 
 int get_permissions (const char *, int, mode_t, struct permission_context *);
 int set_permissions (struct permission_context *, const char *, int);
-void free_permission_context (struct permission_context *);
+void free_permission_context (struct permission_context *)
+#if ! (defined USE_ACL && (HAVE_ACL_GET_FILE || defined GETACL))
+    _GL_ATTRIBUTE_CONST
+#endif
+  ;
 
 _GL_INLINE_HEADER_END
diff --git a/lib/get-permissions.c b/lib/get-permissions.c
index ccee1f1410..6c6618df98 100644
--- a/lib/get-permissions.c
+++ b/lib/get-permissions.c
@@ -33,7 +33,7 @@ int
 get_permissions (const char *name, int desc, mode_t mode,
 		 struct permission_context *ctx)
 {
-  memset (ctx, 0, sizeof(*ctx));
+  memset (ctx, 0, sizeof *ctx);
   ctx->mode = mode;
 
 #if USE_ACL && HAVE_ACL_GET_FILE
@@ -215,38 +215,40 @@ get_permissions (const char *name, int desc, mode_t mode,
 
 #elif USE_ACL && HAVE_GETACL /* HP-UX */
 
-  int ret;
-
-  if (desc != -1)
-    ret = fgetacl (desc, NACLENTRIES, ctx->entries);
-  else
-    ret = getacl (name, NACLENTRIES, ctx->entries);
-  if (ret < 0)
-    {
-      if (errno == ENOSYS || errno == EOPNOTSUPP || errno == ENOTSUP)
-	ret = 0;
-      else
-        return -1;
-    }
-  else if (ret > NACLENTRIES)
-    /* If NACLENTRIES cannot be trusted, use dynamic memory allocation.  */
-    abort ();
-  ctx->count = ret;
+  {
+    int ret;
+
+    if (desc != -1)
+      ret = fgetacl (desc, NACLENTRIES, ctx->entries);
+    else
+      ret = getacl (name, NACLENTRIES, ctx->entries);
+    if (ret < 0)
+      {
+        if (errno == ENOSYS || errno == EOPNOTSUPP || errno == ENOTSUP)
+          ret = 0;
+        else
+          return -1;
+      }
+    else if (ret > NACLENTRIES)
+      /* If NACLENTRIES cannot be trusted, use dynamic memory allocation.  */
+      abort ();
+    ctx->count = ret;
 
 # if HAVE_ACLV_H
-  ret = acl ((char *) name, ACL_GET, NACLVENTRIES, ctx->aclv_entries);
-  if (ret < 0)
-    {
-      if (errno == ENOSYS || errno == EOPNOTSUPP || errno == EINVAL)
-        ret = 0;
-      else
-        return -2;
-    }
-  else if (ret > NACLVENTRIES)
-    /* If NACLVENTRIES cannot be trusted, use dynamic memory allocation.  */
+    ret = acl ((char *) name, ACL_GET, NACLVENTRIES, ctx->aclv_entries);
+    if (ret < 0)
+      {
+        if (errno == ENOSYS || errno == EOPNOTSUPP || errno == EINVAL)
+          ret = 0;
+        else
+          return -2;
+      }
+    else if (ret > NACLVENTRIES)
+      /* If NACLVENTRIES cannot be trusted, use dynamic memory allocation.  */
       abort ();
-  ctx->aclv_count = ret;
+    ctx->aclv_count = ret;
 # endif
+  }
 
 #elif USE_ACL && HAVE_ACLX_GET && ACL_AIX_WIP /* AIX */
 
@@ -254,24 +256,27 @@ get_permissions (const char *name, int desc, mode_t mode,
 
 #elif USE_ACL && HAVE_STATACL /* older AIX */
 
-  if (desc != -1)
-    ret = fstatacl (desc, STX_NORMAL, &ctx->u.a, sizeof (ctx->u));
-  else
-    ret = statacl (name, STX_NORMAL, &ctx->u.a, sizeof (ctx->u));
-  if (ret == 0)
-    ctx->have_u = true;
+  {
+    int ret;
+    if (desc != -1)
+      ret = fstatacl (desc, STX_NORMAL, &ctx->u.a, sizeof ctx->u);
+    else
+      ret = statacl ((char *) name, STX_NORMAL, &ctx->u.a, sizeof ctx->u);
+    if (ret == 0)
+      ctx->have_u = true;
+  }
 
 #elif USE_ACL && HAVE_ACLSORT /* NonStop Kernel */
 
-  int ret;
-
-  ret = acl ((char *) name, ACL_GET, NACLENTRIES, ctx->entries);
-  if (ret < 0)
-    return -1;
-  else if (ret > NACLENTRIES)
-    /* If NACLENTRIES cannot be trusted, use dynamic memory allocation.  */
-    abort ();
-  ctx->count = ret;
+  {
+    int ret = acl ((char *) name, ACL_GET, NACLENTRIES, ctx->entries);
+    if (ret < 0)
+      return -1;
+    else if (ret > NACLENTRIES)
+      /* If NACLENTRIES cannot be trusted, use dynamic memory allocation.  */
+      abort ();
+    ctx->count = ret;
+  }
 
 #endif
 
diff --git a/lib/gnulib.mk b/lib/gnulib.mk
index 95f2f8b48a..2dd0ef82c3 100644
--- a/lib/gnulib.mk
+++ b/lib/gnulib.mk
@@ -44,8 +44,7 @@ HAVE_INCLUDE_NEXT = (__GNUC__ || 60000000 <= __DECC_VER)
 
 ## begin gnulib module acl-permissions
 
-libgnu_a_SOURCES += acl-errno-valid.c acl-internal.c \
-  get-permissions.c set-permissions.c
+libgnu_a_SOURCES += acl-errno-valid.c acl-internal.c    get-permissions.c set-permissions.c
 
 EXTRA_DIST += acl-internal.h acl.h acl_entries.c
 
diff --git a/lib/readlinkat.c b/lib/readlinkat.c
index f4826f9202..c91cf0e820 100644
--- a/lib/readlinkat.c
+++ b/lib/readlinkat.c
@@ -18,7 +18,10 @@
 
 #include <config.h>
 
+#include <errno.h>
 #include <unistd.h>
+#include <string.h>
+#include <sys/stat.h>
 
 #if HAVE_READLINKAT
 
@@ -27,6 +30,21 @@
 ssize_t
 rpl_readlinkat (int fd, char const *file, char *buf, size_t len)
 {
+# if READLINK_TRAILING_SLASH_BUG
+  size_t file_len = strlen (file);
+  if (file_len && file[file_len - 1] == '/')
+    {
+      /* Even if FILE without the slash is a symlink to a directory,
+         both lstat() and stat() must resolve the trailing slash to
+         the directory rather than the symlink.  We can therefore
+         safely use stat() to distinguish between EINVAL and
+         ENOTDIR/ENOENT, avoiding extra overhead of rpl_lstat().  */
+      struct stat st;
+      if (stat (file, &st) == 0)
+        errno = EINVAL;
+      return -1;
+    }
+# endif /* READLINK_TRAILING_SLASH_BUG */
   return readlinkat (fd, file, buf, len);
 }
 
diff --git a/lib/set-permissions.c b/lib/set-permissions.c
index ba291f316f..22368799f7 100644
--- a/lib/set-permissions.c
+++ b/lib/set-permissions.c
@@ -699,7 +699,7 @@ set_acls (struct permission_context *ctx, const char *name, int desc,
       if (desc != -1)
 	ret = fchacl (desc, &ctx->u.a, ctx->u.a.acl_len);
       else
-	ret = chacl (name, &ctx->u.a, ctx->u.a.acl_len);
+	ret = chacl ((char *) name, &ctx->u.a, ctx->u.a.acl_len);
       if (ret < 0)
 	{
 	  if (errno == ENOSYS && from_mode)
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index 759c94d7ab..ec43874296 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -723,11 +723,10 @@ _GL_WARN_ON_USE (getline, "getline is unportable - "
    so any use of gets warrants an unconditional warning; besides, C11
    removed it.  */
 #undef gets
-#if HAVE_RAW_DECL_GETS
+#if HAVE_RAW_DECL_GETS && !defined __cplusplus
 _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
 #endif
 
-
 #if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@
 struct obstack;
 /* Grow an obstack with formatted output.  Return the number of
diff --git a/m4/acl.m4 b/m4/acl.m4
index 5da6a43ab6..75fc9ce4c0 100644
--- a/m4/acl.m4
+++ b/m4/acl.m4
@@ -1,5 +1,5 @@
 # acl.m4 - check for access control list (ACL) primitives
-# serial 20
+# serial 21
 
 # Copyright (C) 2002, 2004-2015 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -181,12 +181,26 @@ AC_DEFUN([gl_FILE_HAS_ACL],
 [
   AC_REQUIRE([gl_FUNC_ACL_ARG])
   if test "$enable_acl" != no; then
-    AC_CHECK_HEADERS([linux/xattr.h])
-    AC_CHECK_HEADERS([sys/xattr.h],
-      [AC_CHECK_FUNCS([getxattr])])
+    AC_CACHE_CHECK([for getxattr with XATTR_NAME_POSIX_ACL macros],
+      [gl_cv_getxattr_with_posix_acls],
+      [gl_cv_getxattr_with_posix_acls=no
+       AC_LINK_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <sys/types.h>
+              #include <sys/xattr.h>
+              #include <linux/xattr.h>
+            ]],
+            [[ssize_t a = getxattr (".", XATTR_NAME_POSIX_ACL_ACCESS, 0, 0);
+              ssize_t b = getxattr (".", XATTR_NAME_POSIX_ACL_DEFAULT, 0, 0);
+              return a < 0 || b < 0;
+            ]])],
+         [gl_cv_getxattr_with_posix_acls=yes])])
   fi
-  if test "$ac_cv_header_sys_xattr_h,$ac_cv_func_getxattr" = yes,yes; then
+  if test "$gl_cv_getxattr_with_posix_acls" = yes; then
     LIB_HAS_ACL=
+    AC_DEFINE([GETXATTR_WITH_POSIX_ACLS], 1,
+      [Define to 1 if getxattr works with XATTR_NAME_POSIX_ACL_ACCESS
+       and XATTR_NAME_POSIX_ACL_DEFAULT.])
   else
     dnl Set gl_need_lib_has_acl to a nonempty value, so that any
     dnl later gl_FUNC_ACL call will set LIB_HAS_ACL=$LIB_ACL.
diff --git a/m4/pthread_sigmask.m4 b/m4/pthread_sigmask.m4
index 5c17dfcd85..2598856646 100644
--- a/m4/pthread_sigmask.m4
+++ b/m4/pthread_sigmask.m4
@@ -1,4 +1,4 @@
-# pthread_sigmask.m4 serial 15
+# pthread_sigmask.m4 serial 16
 dnl Copyright (C) 2011-2015 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -40,6 +40,30 @@ AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
              LIBS="$gl_save_LIBS"
             ])
           if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
+            AC_CACHE_CHECK([whether pthread_sigmask is only a macro],
+              [gl_cv_func_pthread_sigmask_is_macro],
+              [gl_save_LIBS="$LIBS"
+               LIBS="$LIBS $LIBMULTITHREAD"
+               AC_LINK_IFELSE(
+                 [AC_LANG_PROGRAM(
+                    [[#include <pthread.h>
+                      #include <signal.h>
+                      #undef pthread_sigmask
+                    ]],
+                    [[return pthread_sigmask (0, (sigset_t *) 0, (sigset_t *) 0);]])
+                 ],
+                 [gl_cv_func_pthread_sigmask_is_macro=no],
+                 [gl_cv_func_pthread_sigmask_is_macro=yes])
+               LIBS="$gl_save_LIBS"
+              ])
+            if test $gl_cv_func_pthread_sigmask_is_macro = yes; then
+              dnl On MinGW pthread_sigmask is just a macro which always returns 0.
+              dnl It does not exist as a real function, which is required by POSIX.
+              REPLACE_PTHREAD_SIGMASK=1
+              gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD=no
+            fi
+          fi
+          if test $gl_cv_func_pthread_sigmask_in_LIBMULTITHREAD = yes; then
             dnl pthread_sigmask is available with -pthread or -lpthread.
             LIB_PTHREAD_SIGMASK="$LIBMULTITHREAD"
           else
diff --git a/m4/readlinkat.m4 b/m4/readlinkat.m4
index d0f5e69274..3477602a14 100644
--- a/m4/readlinkat.m4
+++ b/m4/readlinkat.m4
@@ -1,4 +1,4 @@
-# serial 4
+# serial 5
 # See if we need to provide readlinkat replacement.
 
 dnl Copyright (C) 2009-2015 Free Software Foundation, Inc.
@@ -13,6 +13,7 @@ AC_DEFUN([gl_FUNC_READLINKAT],
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   AC_CHECK_FUNCS_ONCE([readlinkat])
+  AC_REQUIRE([gl_FUNC_READLINK])
   if test $ac_cv_func_readlinkat = no; then
     HAVE_READLINKAT=0
   else
@@ -25,8 +26,17 @@ AC_DEFUN([gl_FUNC_READLINKAT],
              ssize_t readlinkat (int, char const *, char *, size_t);]])],
          [gl_cv_decl_readlinkat_works=yes],
          [gl_cv_decl_readlinkat_works=no])])
-    if test "$gl_cv_decl_readlink_works" != yes; then
-      REPLACE_READLINKAT=1
-    fi
+    # Assume readinkat has the same trailing slash bug as readlink,
+    # as is the case on Mac Os X 10.10
+    case "$gl_cv_func_readlink_works" in
+      *yes)
+        if test "$gl_cv_decl_readlinkat_works" != yes; then
+          REPLACE_READLINKAT=1
+        fi
+        ;;
+      *)
+        REPLACE_READLINKAT=1
+        ;;
+    esac
   fi
 ])