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* [COMMITTED 2.26] Synchronize support/ infrastructure with master
@ 2018-01-01  0:00 Florian Weimer
  0 siblings, 0 replies; only message in thread
From: Florian Weimer @ 2018-01-01  0:00 UTC (permalink / raw)
  To: libc-stable

commit c247c5366581ce0948de0cde22a49e2bf8c538df
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon Jan 15 15:23:35 2018 +0100

    Synchronize support/ infrastructure with master
    
    This commit updates the support/ subdirectory to
    commit 1a51e46e4a87e1cd9528ac5e5656011636e4086b
    on the master branch.

diff --git a/scripts/backport-support.sh b/scripts/backport-support.sh
index 2ece7ce575..4057e42d3c 100644
--- a/scripts/backport-support.sh
+++ b/scripts/backport-support.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Create a patch which backports the support/ subdirectory.
-# Copyright (C) 2017 Free Software Foundation, Inc.
+# Copyright (C) 2017-2018 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/Makefile b/support/Makefile
index 8458840cd8..1bda81e55e 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -1,5 +1,5 @@
 # Makefile for support library, used only at build and test time
-# Copyright (C) 2016-2017 Free Software Foundation, Inc.
+# Copyright (C) 2016-2018 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/capture_subprocess.h b/support/capture_subprocess.h
index 43caf9bce4..b0886ba1d1 100644
--- a/support/capture_subprocess.h
+++ b/support/capture_subprocess.h
@@ -1,5 +1,5 @@
 /* Capture output from a subprocess.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/check.c b/support/check.c
index 592f2bc856..78f2b3cde1 100644
--- a/support/check.c
+++ b/support/check.c
@@ -1,5 +1,5 @@
 /* Support code for reporting test results.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,6 +18,7 @@
 
 #include <support/check.h>
 
+#include <errno.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -26,9 +27,11 @@
 static void
 print_failure (const char *file, int line, const char *format, va_list ap)
 {
+  int saved_errno = errno;
   printf ("error: %s:%d: ", file, line);
   vprintf (format, ap);
   puts ("");
+  errno = saved_errno;
 }
 
 int
diff --git a/support/check.h b/support/check.h
index 55a6f09f42..2192f38941 100644
--- a/support/check.h
+++ b/support/check.h
@@ -1,5 +1,5 @@
 /* Functionality for reporting test results.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -86,6 +86,13 @@ void support_test_verify_exit_impl (int status, const char *file, int line,
    does not support reporting failures from a DSO.  */
 void support_record_failure (void);
 
+/* Static assertion, under a common name for both C++ and C11.  */
+#ifdef __cplusplus
+# define support_static_assert static_assert
+#else
+# define support_static_assert _Static_assert
+#endif
+
 /* Compare the two integers LEFT and RIGHT and report failure if they
    are different.  */
 #define TEST_COMPARE(left, right)                                       \
@@ -95,43 +102,30 @@ void support_record_failure (void);
     typedef __typeof__ (+ (right)) __right_type;                        \
     __left_type __left_value = (left);                                  \
     __right_type __right_value = (right);                               \
-    /* Prevent use with floating-point and boolean types.  */           \
-    _Static_assert ((__left_type) 1.0 == (__left_type) 1.5,             \
-                    "left value has floating-point type");              \
-    _Static_assert ((__right_type) 1.0 == (__right_type) 1.5,           \
-                    "right value has floating-point type");             \
+    int __left_is_positive = __left_value > 0;                          \
+    int __right_is_positive = __right_value > 0;                        \
+    /* Prevent use with floating-point types.  */                       \
+    support_static_assert ((__left_type) 1.0 == (__left_type) 1.5,      \
+                           "left value has floating-point type");       \
+    support_static_assert ((__right_type) 1.0 == (__right_type) 1.5,    \
+                           "right value has floating-point type");      \
     /* Prevent accidental use with larger-than-long long types.  */     \
-    _Static_assert (sizeof (__left_value) <= sizeof (long long),        \
-                    "left value fits into long long");                  \
-    _Static_assert (sizeof (__right_value) <= sizeof (long long),       \
+    support_static_assert (sizeof (__left_value) <= sizeof (long long), \
+                           "left value fits into long long");           \
+    support_static_assert (sizeof (__right_value) <= sizeof (long long), \
                     "right value fits into long long");                 \
-    /* Make sure that integer conversions does not alter the sign.   */ \
-    enum                                                                \
-    {                                                                   \
-      __left_is_unsigned = (__left_type) -1 > 0,                        \
-      __right_is_unsigned = (__right_type) -1 > 0,                      \
-      __unsigned_left_converts_to_wider = (__left_is_unsigned           \
-                                           && (sizeof (__left_value)    \
-                                               < sizeof (__right_value))), \
-      __unsigned_right_converts_to_wider = (__right_is_unsigned         \
-                                            && (sizeof (__right_value)  \
-                                                < sizeof (__left_value))) \
-    };                                                                  \
-    _Static_assert (__left_is_unsigned == __right_is_unsigned           \
-                    || __unsigned_left_converts_to_wider                \
-                    || __unsigned_right_converts_to_wider,              \
-                    "integer conversions may alter sign of operands");  \
     /* Compare the value.  */                                           \
-    if (__left_value != __right_value)                                  \
+    if (__left_value != __right_value                                   \
+        || __left_is_positive != __right_is_positive)                   \
       /* Pass the sign for printing the correct value.  */              \
       support_test_compare_failure                                      \
         (__FILE__, __LINE__,                                            \
-         #left, __left_value, __left_value < 0, sizeof (__left_type),   \
-         #right, __right_value, __right_value < 0, sizeof (__right_type)); \
+         #left, __left_value, __left_is_positive, sizeof (__left_type), \
+         #right, __right_value, __right_is_positive, sizeof (__right_type)); \
   })
 
-/* Internal implementation of TEST_COMPARE.  LEFT_NEGATIVE and
-   RIGHT_NEGATIVE are used to store the sign separately, so that both
+/* Internal implementation of TEST_COMPARE.  LEFT_POSITIVE and
+   RIGHT_POSITIVE are used to store the sign separately, so that both
    unsigned long long and long long arguments fit into LEFT_VALUE and
    RIGHT_VALUE, and the function can still print the original value.
    LEFT_SIZE and RIGHT_SIZE specify the size of the argument in bytes,
@@ -139,11 +133,11 @@ void support_record_failure (void);
 void support_test_compare_failure (const char *file, int line,
                                    const char *left_expr,
                                    long long left_value,
-                                   int left_negative,
+                                   int left_positive,
                                    int left_size,
                                    const char *right_expr,
                                    long long right_value,
-                                   int right_negative,
+                                   int right_positive,
                                    int right_size);
 
 
diff --git a/support/check_addrinfo.c b/support/check_addrinfo.c
index c47f105ce6..91ad7c56bd 100644
--- a/support/check_addrinfo.c
+++ b/support/check_addrinfo.c
@@ -1,5 +1,5 @@
 /* Compare struct addrinfo values against a formatted string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/check_dns_packet.c b/support/check_dns_packet.c
index 6d14bd90c0..6c1277bd67 100644
--- a/support/check_dns_packet.c
+++ b/support/check_dns_packet.c
@@ -1,5 +1,5 @@
 /* Check that a DNS packet buffer has the expected contents.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/check_hostent.c b/support/check_hostent.c
index 47fb8bc332..56384f9b03 100644
--- a/support/check_hostent.c
+++ b/support/check_hostent.c
@@ -1,5 +1,5 @@
 /* Compare struct hostent values against a formatted string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/check_netent.c b/support/check_netent.c
index 80b69309b4..cbcbfb14e5 100644
--- a/support/check_netent.c
+++ b/support/check_netent.c
@@ -1,5 +1,5 @@
 /* Compare struct netent values against a formatted string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/check_nss.h b/support/check_nss.h
index 2893f2c295..6aa28fa24e 100644
--- a/support/check_nss.h
+++ b/support/check_nss.h
@@ -1,5 +1,5 @@
 /* Test verification functions for NSS- and DNS-related data.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/delayed_exit.c b/support/delayed_exit.c
index 67442f95df..2780d9a6fe 100644
--- a/support/delayed_exit.c
+++ b/support/delayed_exit.c
@@ -1,5 +1,5 @@
 /* Time-triggered process termination.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/format_nss.h b/support/format_nss.h
index fb4597c238..e55354e788 100644
--- a/support/format_nss.h
+++ b/support/format_nss.h
@@ -1,5 +1,5 @@
 /* String formatting functions for NSS- and DNS-related data.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/ignore_stderr.c b/support/ignore_stderr.c
index 7b77a2cd56..450333ad38 100644
--- a/support/ignore_stderr.c
+++ b/support/ignore_stderr.c
@@ -1,5 +1,5 @@
 /* Avoid all the buffer overflow messages on stderr.
-   Copyright (C) 2015-2017 Free Software Foundation, Inc.
+   Copyright (C) 2015-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/namespace.h b/support/namespace.h
index b5e2d1474a..3c3842a49b 100644
--- a/support/namespace.h
+++ b/support/namespace.h
@@ -1,5 +1,5 @@
 /* Entering namespaces for test case isolation.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/next_to_fault.c b/support/next_to_fault.c
index 7c6b077898..1971bf7cd7 100644
--- a/support/next_to_fault.c
+++ b/support/next_to_fault.c
@@ -1,5 +1,5 @@
 /* Memory allocation next to an unmapped page.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/next_to_fault.h b/support/next_to_fault.h
index dd71c28ac0..75759b586c 100644
--- a/support/next_to_fault.h
+++ b/support/next_to_fault.h
@@ -1,5 +1,5 @@
 /* Memory allocation next to an unmapped page.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/oom_error.c b/support/oom_error.c
index 7816978273..fd87fe2305 100644
--- a/support/oom_error.c
+++ b/support/oom_error.c
@@ -1,5 +1,5 @@
 /* Reporting out-of-memory errors.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/resolv_test.c b/support/resolv_test.c
index 1625dcf43a..3f2a09f36f 100644
--- a/support/resolv_test.c
+++ b/support/resolv_test.c
@@ -1,5 +1,5 @@
 /* DNS test framework and libresolv redirection.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -43,15 +43,99 @@ enum
     max_response_length = 65536
   };
 
-/* List of pointers to be freed.  The hash table implementation
-   (struct hsearch_data) does not provide a way to deallocate all
-   objects, so this approach is used to avoid memory leaks.  */
-struct to_be_freed
+/* Used for locating domain names containing for the purpose of
+   forming compression references.  */
+struct compressed_name
 {
-  struct to_be_freed *next;
-  void *ptr;
+  uint16_t offset;
+  unsigned char length;
+  unsigned char name[];         /* Without terminating NUL.  */
 };
 
+static struct compressed_name *
+allocate_compressed_name (const unsigned char *encoded, unsigned int offset)
+{
+  /* Compute the length of the domain name.  */
+  size_t length;
+  {
+    const unsigned char *p;
+    for (p = encoded; *p != '\0';)
+      {
+        /* No compression references are allowed.  */
+        TEST_VERIFY (*p <= 63);
+        /* Skip over the label.  */
+        p += 1 + *p;
+      }
+    length = p - encoded;
+    ++length;                   /* For the terminating NUL byte.  */
+  }
+  TEST_VERIFY_EXIT (length <= 255);
+
+  struct compressed_name *result
+    = xmalloc (offsetof (struct compressed_name, name) + length);
+  result->offset = offset;
+  result->length = length;
+  memcpy (result->name, encoded, length);
+  return result;
+}
+
+/* Convert CH to lower case.  Only change letters in the ASCII
+   range.  */
+static inline unsigned char
+ascii_tolower (unsigned char ch)
+{
+  if ('A' <= ch && ch <= 'Z')
+    return ch - 'A' + 'a';
+  else
+    return ch;
+}
+
+/* Compare both names, for use with tsearch.  The order is arbitrary,
+   but the comparison is case-insenstive.  */
+static int
+compare_compressed_name (const void *left, const void *right)
+{
+  const struct compressed_name *crleft = left;
+  const struct compressed_name *crright = right;
+
+  if (crleft->length != crright->length)
+    /* The operands are converted to int before the subtraction.  */
+    return crleft->length - crright->length;
+
+  const unsigned char *nameleft = crleft->name;
+  const unsigned char *nameright = crright->name;
+
+  while (true)
+    {
+      int lenleft = *nameleft++;
+      int lenright = *nameright++;
+
+      /* Labels must not e compression references.  */
+      TEST_VERIFY (lenleft <= 63);
+      TEST_VERIFY (lenright <= 63);
+
+      if (lenleft != lenright)
+        return left - right;
+      if (lenleft == 0)
+        /* End of name reached without spotting a difference.  */
+        return 0;
+      /* Compare the label in a case-insenstive manner.  */
+      const unsigned char *endnameleft = nameleft + lenleft;
+      while (nameleft < endnameleft)
+        {
+          int l = *nameleft++;
+          int r = *nameright++;
+          if (l != r)
+            {
+              l = ascii_tolower (l);
+              r = ascii_tolower (r);
+              if (l != r)
+                return l - r;
+            }
+        }
+    }
+}
+
 struct resolv_response_builder
 {
   const unsigned char *query_buffer;
@@ -67,11 +151,8 @@ struct resolv_response_builder
      written RDATA sub-structure.  0 if no RDATA is being written.  */
   size_t current_rdata_offset;
 
-  /* Hash table for locating targets for label compression.  */
-  struct hsearch_data compression_offsets;
-  /* List of pointers which need to be freed.  Used for domain names
-     involved in label compression.  */
-  struct to_be_freed *to_be_freed;
+  /* tsearch tree for locating targets for label compression.  */
+  void *compression_offsets;
 
   /* Must be last.  Not zeroed for performance reasons.  */
   unsigned char buffer[max_response_length];
@@ -79,18 +160,6 @@ struct resolv_response_builder
 
 /* Response builder. */
 
-/* Add a pointer to the list of pointers to be freed when B is
-   deallocated.  */
-static void
-response_push_pointer_to_free (struct resolv_response_builder *b, void *ptr)
-{
-  if (ptr == NULL)
-    return;
-  struct to_be_freed *e = xmalloc (sizeof (*e));
-  *e = (struct to_be_freed) {b->to_be_freed, ptr};
-  b->to_be_freed = e;
-}
-
 void
 resolv_response_init (struct resolv_response_builder *b,
                       struct resolv_response_flags flags)
@@ -194,120 +263,88 @@ void
 resolv_response_add_name (struct resolv_response_builder *b,
                           const char *const origname)
 {
-  /* Normalized name.  */
-  char *name;
-  /* Normalized name with case preserved.  */
-  char *name_case;
-  {
-    size_t namelen = strlen (origname);
-    /* Remove trailing dots.  FIXME: Handle trailing quoted dots.  */
-    while (namelen > 0 && origname[namelen - 1] == '.')
-      --namelen;
-    name = xmalloc (namelen + 1);
-    name_case = xmalloc (namelen + 1);
-    /* Copy and convert to lowercase.  FIXME: This needs to normalize
-       escaping as well.  */
-    for (size_t i = 0; i < namelen; ++i)
-      {
-        char ch = origname[i];
-        name_case[i] = ch;
-        if ('A' <= ch && ch <= 'Z')
-          ch = ch - 'A' + 'a';
-        name[i] = ch;
-      }
-    name[namelen] = 0;
-    name_case[namelen] = 0;
-  }
-  char *name_start = name;
-  char *name_case_start = name_case;
+  unsigned char encoded_name[NS_MAXDNAME];
+  if (ns_name_pton (origname, encoded_name, sizeof (encoded_name)) < 0)
+    FAIL_EXIT1 ("ns_name_pton (\"%s\"): %m", origname);
 
-  bool compression = false;
-  while (*name)
+  /* Copy the encoded name into the output buffer, apply compression
+     where possible.  */
+  for (const unsigned char *name = encoded_name; ;)
     {
-      /* Search for a previous name we can reference.  */
-      ENTRY new_entry =
+      if (*name == '\0')
         {
-          .key = name,
-          .data = (void *) (uintptr_t) b->offset,
-        };
+          /* We have reached the end of the name.  Add the terminating
+             NUL byte.  */
+          response_add_byte (b, '\0');
+          break;
+        }
 
-      /* If the label can be a compression target because it is at a
-         reachable offset, add it to the hash table.  */
-      ACTION action;
-      if (b->offset < (1 << 12))
-        action = ENTER;
-      else
-        action = FIND;
+      /* Set to the compression target if compression is possible.  */
+      struct compressed_name *crname_target;
 
-      /* Search for known compression offsets in the hash table.  */
-      ENTRY *e;
-      if (hsearch_r (new_entry, action, &e, &b->compression_offsets) == 0)
-        {
-          if (action == FIND && errno == ESRCH)
-            /* Fall through.  */
-            e = NULL;
-          else
-            FAIL_EXIT1 ("hsearch_r failure in name compression: %m");
-        }
+      /* Compression references can only reach the beginning of the
+         packet.  */
+      enum { compression_limit = 1 << 12 };
+
+      {
+        /* The trailing part of the name to be looked up in the tree
+           with the compression targets.  */
+        struct compressed_name *crname
+          = allocate_compressed_name (name, b->offset);
+
+        if (b->offset < compression_limit)
+          {
+            /* Add the name to the tree, for future compression
+               references.  */
+            void **ptr = tsearch (crname, &b->compression_offsets,
+                                  compare_compressed_name);
+            if (ptr == NULL)
+              FAIL_EXIT1 ("tsearch out of memory");
+            crname_target = *ptr;
+
+            if (crname_target != crname)
+              /* The new name was not actually added to the tree.
+                 Deallocate it.  */
+              free (crname);
+            else
+              /* Signal that the tree did not yet contain the name,
+                 but keep the allocation because it is now part of the
+                 tree.  */
+              crname_target = NULL;
+          }
+        else
+          {
+            /* This name cannot be reached by a compression reference.
+               No need to add it to the tree for future reference.  */
+            void **ptr = tfind (crname, &b->compression_offsets,
+                                compare_compressed_name);
+            if (ptr != NULL)
+              crname_target = *ptr;
+            else
+              crname_target = NULL;
+            TEST_VERIFY (crname_target != crname);
+            /* Not added to the tree.  */
+            free (crname);
+          }
+      }
 
-      /* The name is known.  Reference the previous location.  */
-      if (e != NULL && e->data != new_entry.data)
+      if (crname_target != NULL)
         {
-          size_t old_offset = (uintptr_t) e->data;
+          /* The name is known.  Reference the previous location.  */
+          unsigned int old_offset = crname_target->offset;
+          TEST_VERIFY_EXIT (old_offset < compression_limit);
           response_add_byte (b, 0xC0 | (old_offset >> 8));
           response_add_byte (b, old_offset);
-          compression = true;
           break;
         }
-
-      /* The name does not exist yet.  Write one label.  First, add
-         room for the label length.  */
-      size_t buffer_label_offset = b->offset;
-      response_add_byte (b, 0);
-
-      /* Copy the label.  */
-      while (true)
+      else
         {
-          char ch = *name_case;
-          if (ch == '\0')
-            break;
-          ++name;
-          ++name_case;
-          if (ch == '.')
-            break;
-          /* FIXME: Handle escaping.  */
-          response_add_byte (b, ch);
+          /* The name is new.  Add this label.  */
+          unsigned int len = 1 + *name;
+          resolv_response_add_data (b, name, len);
+          name += len;
         }
-
-      /* Patch in the label length.  */
-      size_t label_length = b->offset - buffer_label_offset - 1;
-      if (label_length == 0)
-        FAIL_EXIT1 ("empty label in name compression: %s", origname);
-      if (label_length > 63)
-        FAIL_EXIT1 ("label too long in name compression: %s", origname);
-      b->buffer[buffer_label_offset] = label_length;
-
-      /* Continue with the tail of the name and the next label.  */
-    }
-
-  if (compression)
-    {
-      /* If we found an immediate match for the name, we have not put
-         it into the hash table, and can free it immediately.  */
-      if (name == name_start)
-        free (name_start);
-      else
-        response_push_pointer_to_free (b, name_start);
-    }
-  else
-    {
-      /* Terminate the sequence of labels.  With compression, this is
-         implicit in the compression reference.  */
-      response_add_byte (b, 0);
-      response_push_pointer_to_free (b, name_start);
     }
-
-  free (name_case_start);
 }
 
 void
@@ -403,22 +440,13 @@ response_builder_allocate
   memset (b, 0, offsetof (struct resolv_response_builder, buffer));
   b->query_buffer = query_buffer;
   b->query_length = query_length;
-  TEST_VERIFY_EXIT (hcreate_r (10000, &b->compression_offsets) != 0);
   return b;
 }
 
 static void
 response_builder_free (struct resolv_response_builder *b)
 {
-  struct to_be_freed *current = b->to_be_freed;
-  while (current != NULL)
-    {
-      struct to_be_freed *next = current->next;
-      free (current->ptr);
-      free (current);
-      current = next;
-    }
-  hdestroy_r (&b->compression_offsets);
+  tdestroy (b->compression_offsets, free);
   free (b);
 }
 
diff --git a/support/resolv_test.h b/support/resolv_test.h
index b953dc1200..4c2e6c1b41 100644
--- a/support/resolv_test.h
+++ b/support/resolv_test.h
@@ -1,5 +1,5 @@
 /* DNS test framework and libresolv redirection.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/run_diff.h b/support/run_diff.h
index f65b5dd22c..6e949226fa 100644
--- a/support/run_diff.h
+++ b/support/run_diff.h
@@ -1,5 +1,5 @@
 /* Invoke the system diff tool to compare two strings.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/set_fortify_handler.c b/support/set_fortify_handler.c
index f434a8082a..c2dacbb179 100644
--- a/support/set_fortify_handler.c
+++ b/support/set_fortify_handler.c
@@ -1,5 +1,5 @@
 /* Set signal handler for use in fortify tests.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support-xfstat.c b/support/support-xfstat.c
index 4c8ee9142b..f69253af09 100644
--- a/support/support-xfstat.c
+++ b/support/support-xfstat.c
@@ -1,5 +1,5 @@
 /* fstat64 with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support-xstat.c b/support/support-xstat.c
index 86a81ec601..fc10c6dcb7 100644
--- a/support/support-xstat.c
+++ b/support/support-xstat.c
@@ -1,5 +1,5 @@
 /* stat64 with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support.h b/support/support.h
index bbba803ba1..bc5827ed87 100644
--- a/support/support.h
+++ b/support/support.h
@@ -1,5 +1,5 @@
 /* Common extra functions.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_become_root.c b/support/support_become_root.c
index 933138f99f..6947dbaa80 100644
--- a/support/support_become_root.c
+++ b/support/support_become_root.c
@@ -1,5 +1,5 @@
 /* Acquire root privileges.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_can_chroot.c b/support/support_can_chroot.c
index a462753f76..8922576d19 100644
--- a/support/support_can_chroot.c
+++ b/support/support_can_chroot.c
@@ -1,5 +1,5 @@
 /* Return true if the process can perform a chroot operation.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_capture_subprocess.c b/support/support_capture_subprocess.c
index 030f124252..6d2029e13b 100644
--- a/support/support_capture_subprocess.c
+++ b/support/support_capture_subprocess.c
@@ -1,5 +1,5 @@
 /* Capture output from a subprocess.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_capture_subprocess_check.c b/support/support_capture_subprocess_check.c
index e1cf73b6a5..ff5ee89fb0 100644
--- a/support/support_capture_subprocess_check.c
+++ b/support/support_capture_subprocess_check.c
@@ -1,5 +1,5 @@
 /* Verify capture output from a subprocess.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_chroot.c b/support/support_chroot.c
index 693813f694..6356b1af6c 100644
--- a/support/support_chroot.c
+++ b/support/support_chroot.c
@@ -1,5 +1,5 @@
 /* Setup a chroot environment for use within tests.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_enter_mount_namespace.c b/support/support_enter_mount_namespace.c
index 6140692075..ba68e990f2 100644
--- a/support/support_enter_mount_namespace.c
+++ b/support/support_enter_mount_namespace.c
@@ -1,5 +1,5 @@
 /* Enter a mount namespace.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -20,7 +20,9 @@
 
 #include <sched.h>
 #include <stdio.h>
-#include <sys/mount.h>
+#ifdef CLONE_NEWNS
+# include <sys/mount.h>
+#endif /* CLONE_NEWNS */
 
 bool
 support_enter_mount_namespace (void)
diff --git a/support/support_enter_network_namespace.c b/support/support_enter_network_namespace.c
index 28b0ee29cf..1d874df885 100644
--- a/support/support_enter_network_namespace.c
+++ b/support/support_enter_network_namespace.c
@@ -1,5 +1,5 @@
 /* Enter a network namespace.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_format_address_family.c b/support/support_format_address_family.c
index 5d42c42a45..2acb9afffd 100644
--- a/support/support_format_address_family.c
+++ b/support/support_format_address_family.c
@@ -1,5 +1,5 @@
 /* Convert an address family to a string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_format_addrinfo.c b/support/support_format_addrinfo.c
index daf335f775..c5e00e516a 100644
--- a/support/support_format_addrinfo.c
+++ b/support/support_format_addrinfo.c
@@ -1,5 +1,5 @@
 /* Convert struct addrinfo values to a string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_format_dns_packet.c b/support/support_format_dns_packet.c
index e5ef1aa4b3..1170eafb0f 100644
--- a/support/support_format_dns_packet.c
+++ b/support/support_format_dns_packet.c
@@ -1,5 +1,5 @@
 /* Convert a DNS packet to a human-readable representation.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_format_herrno.c b/support/support_format_herrno.c
index 493d6ae962..3d2dc8b27a 100644
--- a/support/support_format_herrno.c
+++ b/support/support_format_herrno.c
@@ -1,5 +1,5 @@
 /* Convert a h_errno error code to a string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_format_hostent.c b/support/support_format_hostent.c
index 0aac17972b..a4a62afe0a 100644
--- a/support/support_format_hostent.c
+++ b/support/support_format_hostent.c
@@ -1,5 +1,5 @@
 /* Convert a struct hostent object to a string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_format_netent.c b/support/support_format_netent.c
index be8f1720a2..0d15e78440 100644
--- a/support/support_format_netent.c
+++ b/support/support_format_netent.c
@@ -1,5 +1,5 @@
 /* Convert a struct netent object to a string.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_isolate_in_subprocess.c b/support/support_isolate_in_subprocess.c
index cf48614383..25edc00385 100644
--- a/support/support_isolate_in_subprocess.c
+++ b/support/support_isolate_in_subprocess.c
@@ -1,5 +1,5 @@
 /* Run a function in a subprocess.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_record_failure.c b/support/support_record_failure.c
index 684055c746..356798f556 100644
--- a/support/support_record_failure.c
+++ b/support/support_record_failure.c
@@ -1,5 +1,5 @@
 /* Global test failure counter.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_run_diff.c b/support/support_run_diff.c
index f5155de727..f24f6c3281 100644
--- a/support/support_run_diff.c
+++ b/support/support_run_diff.c
@@ -1,5 +1,5 @@
 /* Invoke the system diff tool to compare two strings.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_shared_allocate.c b/support/support_shared_allocate.c
index 61d088e8cf..8ab43c4b38 100644
--- a/support/support_shared_allocate.c
+++ b/support/support_shared_allocate.c
@@ -1,5 +1,5 @@
 /* Allocate a memory region shared across processes.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_test_compare_failure.c b/support/support_test_compare_failure.c
index 894145b56d..8eb51c439d 100644
--- a/support/support_test_compare_failure.c
+++ b/support/support_test_compare_failure.c
@@ -1,5 +1,5 @@
 /* Reporting a numeric comparison failure.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -16,18 +16,19 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#include <errno.h>
 #include <stdio.h>
 #include <support/check.h>
 
 static void
-report (const char *which, const char *expr, long long value, int negative,
+report (const char *which, const char *expr, long long value, int positive,
         int size)
 {
   printf ("  %s: ", which);
-  if (negative)
-    printf ("%lld", value);
-  else
+  if (positive)
     printf ("%llu", (unsigned long long) value);
+  else
+    printf ("%lld", value);
   unsigned long long mask
     = (~0ULL) >> (8 * (sizeof (unsigned long long) - size));
   printf (" (0x%llx); from: %s\n", (unsigned long long) value & mask, expr);
@@ -37,19 +38,21 @@ void
 support_test_compare_failure (const char *file, int line,
                               const char *left_expr,
                               long long left_value,
-                              int left_negative,
+                              int left_positive,
                               int left_size,
                               const char *right_expr,
                               long long right_value,
-                              int right_negative,
+                              int right_positive,
                               int right_size)
 {
+  int saved_errno = errno;
   support_record_failure ();
   if (left_size != right_size)
     printf ("%s:%d: numeric comparison failure (widths %d and %d)\n",
             file, line, left_size * 8, right_size * 8);
   else
     printf ("%s:%d: numeric comparison failure\n", file, line);
-  report (" left", left_expr, left_value, left_negative, left_size);
-  report ("right", right_expr, right_value, right_negative, right_size);
+  report (" left", left_expr, left_value, left_positive, left_size);
+  report ("right", right_expr, right_value, right_positive, right_size);
+  errno = saved_errno;
 }
diff --git a/support/support_test_main.c b/support/support_test_main.c
index 3c411a467b..396385729b 100644
--- a/support/support_test_main.c
+++ b/support/support_test_main.c
@@ -1,5 +1,5 @@
 /* Main worker function for the test driver.
-   Copyright (C) 1998-2017 Free Software Foundation, Inc.
+   Copyright (C) 1998-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/support_test_verify_impl.c b/support/support_test_verify_impl.c
index 55ab2111b3..5ff5555a6a 100644
--- a/support/support_test_verify_impl.c
+++ b/support/support_test_verify_impl.c
@@ -1,5 +1,5 @@
 /* Implementation of the TEST_VERIFY and TEST_VERIFY_EXIT macros.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,14 +18,17 @@
 
 #include <support/check.h>
 
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 void
 support_test_verify_impl (const char *file, int line, const char *expr)
 {
+  int saved_errno = errno;
   support_record_failure ();
   printf ("error: %s:%d: not true: %s\n", file, line, expr);
+  errno = saved_errno;
 }
 
 void
diff --git a/support/support_write_file_string.c b/support/support_write_file_string.c
index 48736530bf..7505679401 100644
--- a/support/support_write_file_string.c
+++ b/support/support_write_file_string.c
@@ -1,5 +1,5 @@
 /* Write a string to a file.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/temp_file-internal.h b/support/temp_file-internal.h
index fb6cceb065..4cee3c0c35 100644
--- a/support/temp_file-internal.h
+++ b/support/temp_file-internal.h
@@ -1,5 +1,5 @@
 /* Internal weak declarations for temporary file handling.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/temp_file.c b/support/temp_file.c
index 547263a3e4..0bbc7f9972 100644
--- a/support/temp_file.c
+++ b/support/temp_file.c
@@ -1,5 +1,5 @@
 /* Temporary file handling for tests.
-   Copyright (C) 1998-2017 Free Software Foundation, Inc.
+   Copyright (C) 1998-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/temp_file.h b/support/temp_file.h
index 3b8563e115..c7795cc577 100644
--- a/support/temp_file.h
+++ b/support/temp_file.h
@@ -1,5 +1,5 @@
 /* Declarations for temporary file handling.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/test-driver.c b/support/test-driver.c
index 47c387c2b4..09c8783e4f 100644
--- a/support/test-driver.c
+++ b/support/test-driver.c
@@ -1,5 +1,5 @@
 /* Main function for test programs.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/test-driver.h b/support/test-driver.h
index a8fe9c3565..1708d68d60 100644
--- a/support/test-driver.h
+++ b/support/test-driver.h
@@ -1,5 +1,5 @@
 /* Interfaces for the test driver.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/tst-support-namespace.c b/support/tst-support-namespace.c
index dbe7cc07c8..e20423c4a3 100644
--- a/support/tst-support-namespace.c
+++ b/support/tst-support-namespace.c
@@ -1,5 +1,5 @@
 /* Test entering namespaces.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/tst-support_capture_subprocess.c b/support/tst-support_capture_subprocess.c
index 5672fba0f7..a685256091 100644
--- a/support/tst-support_capture_subprocess.c
+++ b/support/tst-support_capture_subprocess.c
@@ -1,5 +1,5 @@
 /* Test capturing output from a subprocess.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/tst-support_format_dns_packet.c b/support/tst-support_format_dns_packet.c
index 9c8589c09c..b1135eebc6 100644
--- a/support/tst-support_format_dns_packet.c
+++ b/support/tst-support_format_dns_packet.c
@@ -1,5 +1,5 @@
 /* Tests for the support_format_dns_packet function.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/tst-support_record_failure-2.sh b/support/tst-support_record_failure-2.sh
index 2c9372cc29..09cd96290a 100644
--- a/support/tst-support_record_failure-2.sh
+++ b/support/tst-support_record_failure-2.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Test failure recording (with and without --direct).
-# Copyright (C) 2016-2017 Free Software Foundation, Inc.
+# Copyright (C) 2016-2018 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/tst-support_record_failure.c b/support/tst-support_record_failure.c
index e739e739c3..8757f2da02 100644
--- a/support/tst-support_record_failure.c
+++ b/support/tst-support_record_failure.c
@@ -1,5 +1,5 @@
 /* Test support_record_failure state sharing.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/tst-test_compare.c b/support/tst-test_compare.c
index de138d4f8a..123ba1bc3c 100644
--- a/support/tst-test_compare.c
+++ b/support/tst-test_compare.c
@@ -1,5 +1,5 @@
 /* Basic test for the TEST_COMPARE macro.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -42,6 +42,22 @@ struct bitfield
   unsigned long long int u63 : 63;
 };
 
+/* Functions which return signed sizes are common, so test that these
+   results can readily checked using TEST_COMPARE.  */
+
+static int
+return_ssize_t (void)
+{
+  return 4;
+}
+
+static int
+return_int (void)
+{
+  return 4;
+}
+
+
 static int
 do_test (void)
 {
@@ -53,6 +69,8 @@ do_test (void)
     unsigned short u16 = 3;
     TEST_COMPARE (i8, u16);
   }
+  TEST_COMPARE (return_ssize_t (), sizeof (char[4]));
+  TEST_COMPARE (return_int (), sizeof (char[4]));
 
   struct bitfield bitfield = { 0 };
   TEST_COMPARE (bitfield.i2, bitfield.i3);
diff --git a/support/tst-xreadlink.c b/support/tst-xreadlink.c
index a4a22812c1..b142207228 100644
--- a/support/tst-xreadlink.c
+++ b/support/tst-xreadlink.c
@@ -1,5 +1,5 @@
 /* Test the xreadlink function.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/write_message.c b/support/write_message.c
index f03ed931d6..a3e2f90535 100644
--- a/support/write_message.c
+++ b/support/write_message.c
@@ -1,5 +1,5 @@
 /* Write a message to standard output.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,12 +18,15 @@
 
 #include <support/support.h>
 
+#include <errno.h>
 #include <string.h>
 #include <unistd.h>
 
 void
 write_message (const char *message)
 {
+  int saved_errno = errno;
   ssize_t unused __attribute__ ((unused));
   unused = write (STDOUT_FILENO, message, strlen (message));
+  errno = saved_errno;
 }
diff --git a/support/xaccept.c b/support/xaccept.c
index 7b25af3b05..fd65fc6c3a 100644
--- a/support/xaccept.c
+++ b/support/xaccept.c
@@ -1,5 +1,5 @@
 /* accept with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xaccept4.c b/support/xaccept4.c
index 67dd95e9fb..ada3c92267 100644
--- a/support/xaccept4.c
+++ b/support/xaccept4.c
@@ -1,5 +1,5 @@
 /* accept4 with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xasprintf.c b/support/xasprintf.c
index 5157680fa2..e593ec5e82 100644
--- a/support/xasprintf.c
+++ b/support/xasprintf.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for asprintf.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xbind.c b/support/xbind.c
index cfc6dd8fa8..938e7c07d6 100644
--- a/support/xbind.c
+++ b/support/xbind.c
@@ -1,5 +1,5 @@
 /* bind with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xcalloc.c b/support/xcalloc.c
index 135f42dab2..403569041f 100644
--- a/support/xcalloc.c
+++ b/support/xcalloc.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for calloc.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xchroot.c b/support/xchroot.c
index abcc299e00..d4759a1bd1 100644
--- a/support/xchroot.c
+++ b/support/xchroot.c
@@ -1,5 +1,5 @@
 /* chroot with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xclose.c b/support/xclose.c
index c931e08421..702bef6c6e 100644
--- a/support/xclose.c
+++ b/support/xclose.c
@@ -1,5 +1,5 @@
 /* close with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xconnect.c b/support/xconnect.c
index 0266dbc643..341805d80d 100644
--- a/support/xconnect.c
+++ b/support/xconnect.c
@@ -1,5 +1,5 @@
 /* connect with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xdlfcn.c b/support/xdlfcn.c
index 05966c41ef..f34bb059c0 100644
--- a/support/xdlfcn.c
+++ b/support/xdlfcn.c
@@ -1,5 +1,5 @@
 /* Support functionality for using dlopen/dlclose/dlsym.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xdlfcn.h b/support/xdlfcn.h
index 9bdcb38d3e..5ab7494e70 100644
--- a/support/xdlfcn.h
+++ b/support/xdlfcn.h
@@ -1,5 +1,5 @@
 /* Support functionality for using dlopen/dlclose/dlsym.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xdup2.c b/support/xdup2.c
index dc08c94518..b8c4c223fb 100644
--- a/support/xdup2.c
+++ b/support/xdup2.c
@@ -1,5 +1,5 @@
 /* dup2 with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xfclose.c b/support/xfclose.c
index 2737f05044..39d46f042a 100644
--- a/support/xfclose.c
+++ b/support/xfclose.c
@@ -1,5 +1,5 @@
 /* fclose with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xfopen.c b/support/xfopen.c
index 14532a09f3..fb931cf22b 100644
--- a/support/xfopen.c
+++ b/support/xfopen.c
@@ -1,5 +1,5 @@
 /* fopen with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xfork.c b/support/xfork.c
index aa52ba62c5..dffa2a13d0 100644
--- a/support/xfork.c
+++ b/support/xfork.c
@@ -1,5 +1,5 @@
 /* fork with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xftruncate.c b/support/xftruncate.c
index 9c4e9e3050..27c7e12ba2 100644
--- a/support/xftruncate.c
+++ b/support/xftruncate.c
@@ -1,5 +1,5 @@
 /* ftruncate with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xgetsockname.c b/support/xgetsockname.c
index c3bd884f8d..797194f79d 100644
--- a/support/xgetsockname.c
+++ b/support/xgetsockname.c
@@ -1,5 +1,5 @@
 /* getsockname with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xlisten.c b/support/xlisten.c
index 1953e5900a..aa70091adb 100644
--- a/support/xlisten.c
+++ b/support/xlisten.c
@@ -1,5 +1,5 @@
 /* listen with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xlseek.c b/support/xlseek.c
index 0a75a9f2e6..2422939908 100644
--- a/support/xlseek.c
+++ b/support/xlseek.c
@@ -1,5 +1,5 @@
 /* lseek with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmalloc.c b/support/xmalloc.c
index 450f699789..78317e2b12 100644
--- a/support/xmalloc.c
+++ b/support/xmalloc.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for malloc.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmemstream.c b/support/xmemstream.c
index bce6dc9170..df5fbc489a 100644
--- a/support/xmemstream.c
+++ b/support/xmemstream.c
@@ -1,5 +1,5 @@
 /* Error-checking wrappers for memstream functions.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmemstream.h b/support/xmemstream.h
index e5ba231e4d..2d4a577f29 100644
--- a/support/xmemstream.h
+++ b/support/xmemstream.h
@@ -1,5 +1,5 @@
 /* Error-checking wrappers for memstream functions.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmkdir.c b/support/xmkdir.c
index ea17d49391..7e67f783de 100644
--- a/support/xmkdir.c
+++ b/support/xmkdir.c
@@ -1,5 +1,5 @@
 /* mkdir with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmmap.c b/support/xmmap.c
index 435b1eb733..d580c07013 100644
--- a/support/xmmap.c
+++ b/support/xmmap.c
@@ -1,5 +1,5 @@
 /* mmap with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmprotect.c b/support/xmprotect.c
index 9410251c32..e6870988e0 100644
--- a/support/xmprotect.c
+++ b/support/xmprotect.c
@@ -1,5 +1,5 @@
 /* mprotect with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xmunmap.c b/support/xmunmap.c
index 6ef5a4a468..e8e5bc2d59 100644
--- a/support/xmunmap.c
+++ b/support/xmunmap.c
@@ -1,5 +1,5 @@
 /* munmap with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xopen.c b/support/xopen.c
index 7f033a03a7..3d888e8862 100644
--- a/support/xopen.c
+++ b/support/xopen.c
@@ -1,5 +1,5 @@
 /* open64 with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpipe.c b/support/xpipe.c
index 89a64a55c1..b8529df620 100644
--- a/support/xpipe.c
+++ b/support/xpipe.c
@@ -1,5 +1,5 @@
 /* pipe with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpoll.c b/support/xpoll.c
index bec2521ffc..b24bf32fc5 100644
--- a/support/xpoll.c
+++ b/support/xpoll.c
@@ -1,5 +1,5 @@
 /* poll with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_attr_destroy.c b/support/xpthread_attr_destroy.c
index 664c809e9f..52aa2602fe 100644
--- a/support/xpthread_attr_destroy.c
+++ b/support/xpthread_attr_destroy.c
@@ -1,5 +1,5 @@
 /* pthread_attr_destroy with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_attr_init.c b/support/xpthread_attr_init.c
index 2e30ade9ab..c7aa903db2 100644
--- a/support/xpthread_attr_init.c
+++ b/support/xpthread_attr_init.c
@@ -1,5 +1,5 @@
 /* pthread_attr_init with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_attr_setdetachstate.c b/support/xpthread_attr_setdetachstate.c
index b544dbaa42..6e845acc97 100644
--- a/support/xpthread_attr_setdetachstate.c
+++ b/support/xpthread_attr_setdetachstate.c
@@ -1,5 +1,5 @@
 /* pthread_attr_setdetachstate with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_attr_setguardsize.c b/support/xpthread_attr_setguardsize.c
index 35fed5d9ec..964ec058c9 100644
--- a/support/xpthread_attr_setguardsize.c
+++ b/support/xpthread_attr_setguardsize.c
@@ -1,5 +1,5 @@
 /* pthread_attr_setguardsize with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_attr_setstacksize.c b/support/xpthread_attr_setstacksize.c
index 02d06310a9..c5517c0c66 100644
--- a/support/xpthread_attr_setstacksize.c
+++ b/support/xpthread_attr_setstacksize.c
@@ -1,5 +1,5 @@
 /* pthread_attr_setstacksize with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_barrier_destroy.c b/support/xpthread_barrier_destroy.c
index efc0719a63..1dae148b46 100644
--- a/support/xpthread_barrier_destroy.c
+++ b/support/xpthread_barrier_destroy.c
@@ -1,5 +1,5 @@
 /* pthread_barrier_destroy with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_barrier_init.c b/support/xpthread_barrier_init.c
index b32dad1315..4a2975ad12 100644
--- a/support/xpthread_barrier_init.c
+++ b/support/xpthread_barrier_init.c
@@ -1,5 +1,5 @@
 /* pthread_barrier_init with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_barrier_wait.c b/support/xpthread_barrier_wait.c
index 7cee44d0a3..61690c5e7c 100644
--- a/support/xpthread_barrier_wait.c
+++ b/support/xpthread_barrier_wait.c
@@ -1,5 +1,5 @@
 /* pthread_barrier_wait with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_cancel.c b/support/xpthread_cancel.c
index 3af16f9b54..26e864ea3e 100644
--- a/support/xpthread_cancel.c
+++ b/support/xpthread_cancel.c
@@ -1,5 +1,5 @@
 /* pthread_cancel with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_check_return.c b/support/xpthread_check_return.c
index 3094d82e9c..1658db4b62 100644
--- a/support/xpthread_check_return.c
+++ b/support/xpthread_check_return.c
@@ -1,5 +1,5 @@
 /* Return value checking for pthread functions, exit variant.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_cond_wait.c b/support/xpthread_cond_wait.c
index b0e9b2a232..08ec683b66 100644
--- a/support/xpthread_cond_wait.c
+++ b/support/xpthread_cond_wait.c
@@ -1,5 +1,5 @@
 /* pthread_cond_wait with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_create.c b/support/xpthread_create.c
index 98c63e54c3..24b8456db9 100644
--- a/support/xpthread_create.c
+++ b/support/xpthread_create.c
@@ -1,5 +1,5 @@
 /* pthread_create with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_detach.c b/support/xpthread_detach.c
index 2088af2f57..c65f2d7db1 100644
--- a/support/xpthread_detach.c
+++ b/support/xpthread_detach.c
@@ -1,5 +1,5 @@
 /* pthread_detach with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_join.c b/support/xpthread_join.c
index f23bb9a5ae..29acbd283a 100644
--- a/support/xpthread_join.c
+++ b/support/xpthread_join.c
@@ -1,5 +1,5 @@
 /* pthread_join with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutex_consistent.c b/support/xpthread_mutex_consistent.c
index 52364be365..d337163609 100644
--- a/support/xpthread_mutex_consistent.c
+++ b/support/xpthread_mutex_consistent.c
@@ -1,5 +1,5 @@
 /* pthread_mutex_consistent with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutex_destroy.c b/support/xpthread_mutex_destroy.c
index f11f8f0acd..d03f016629 100644
--- a/support/xpthread_mutex_destroy.c
+++ b/support/xpthread_mutex_destroy.c
@@ -1,5 +1,5 @@
 /* pthread_mutex_destroy with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutex_init.c b/support/xpthread_mutex_init.c
index 2d16d1b9d9..40855954a8 100644
--- a/support/xpthread_mutex_init.c
+++ b/support/xpthread_mutex_init.c
@@ -1,5 +1,5 @@
 /* pthread_mutex_init with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutex_lock.c b/support/xpthread_mutex_lock.c
index af727b45f3..4257960aaa 100644
--- a/support/xpthread_mutex_lock.c
+++ b/support/xpthread_mutex_lock.c
@@ -1,5 +1,5 @@
 /* pthread_mutex_lock with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutex_unlock.c b/support/xpthread_mutex_unlock.c
index 161b41edf6..5c385c6934 100644
--- a/support/xpthread_mutex_unlock.c
+++ b/support/xpthread_mutex_unlock.c
@@ -1,5 +1,5 @@
 /* pthread_mutex_unlock with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutexattr_destroy.c b/support/xpthread_mutexattr_destroy.c
index c699e32b41..f352a7ad93 100644
--- a/support/xpthread_mutexattr_destroy.c
+++ b/support/xpthread_mutexattr_destroy.c
@@ -1,5 +1,5 @@
 /* pthread_mutexattr_destroy with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutexattr_init.c b/support/xpthread_mutexattr_init.c
index fa93fab178..fe231581e3 100644
--- a/support/xpthread_mutexattr_init.c
+++ b/support/xpthread_mutexattr_init.c
@@ -1,5 +1,5 @@
 /* pthread_mutexattr_init with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutexattr_setprotocol.c b/support/xpthread_mutexattr_setprotocol.c
index 353f75e3d7..e2f544d38c 100644
--- a/support/xpthread_mutexattr_setprotocol.c
+++ b/support/xpthread_mutexattr_setprotocol.c
@@ -1,5 +1,5 @@
 /* pthread_mutexattr_setprotocol with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutexattr_setpshared.c b/support/xpthread_mutexattr_setpshared.c
index 242da1aeca..2380560d79 100644
--- a/support/xpthread_mutexattr_setpshared.c
+++ b/support/xpthread_mutexattr_setpshared.c
@@ -1,5 +1,5 @@
 /* pthread_mutexattr_setpshared with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutexattr_setrobust.c b/support/xpthread_mutexattr_setrobust.c
index d7d6fa8630..7886c72a77 100644
--- a/support/xpthread_mutexattr_setrobust.c
+++ b/support/xpthread_mutexattr_setrobust.c
@@ -1,5 +1,5 @@
 /* pthread_mutexattr_setrobust with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_mutexattr_settype.c b/support/xpthread_mutexattr_settype.c
index cf22170b56..91f790c9e5 100644
--- a/support/xpthread_mutexattr_settype.c
+++ b/support/xpthread_mutexattr_settype.c
@@ -1,5 +1,5 @@
 /* pthread_mutexattr_settype with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_once.c b/support/xpthread_once.c
index 70d58dbab2..b22c1ce3dd 100644
--- a/support/xpthread_once.c
+++ b/support/xpthread_once.c
@@ -1,5 +1,5 @@
 /* pthread_once with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_rwlock_init.c b/support/xpthread_rwlock_init.c
index 824288c90e..e6c38115d8 100644
--- a/support/xpthread_rwlock_init.c
+++ b/support/xpthread_rwlock_init.c
@@ -1,5 +1,5 @@
 /* pthread_rwlock_init with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_rwlock_rdlock.c b/support/xpthread_rwlock_rdlock.c
index 96330a5637..a88068fc86 100644
--- a/support/xpthread_rwlock_rdlock.c
+++ b/support/xpthread_rwlock_rdlock.c
@@ -1,5 +1,5 @@
 /* pthread_rwlock_rdlock with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_rwlock_unlock.c b/support/xpthread_rwlock_unlock.c
index eaa136b3ec..7eb282fd18 100644
--- a/support/xpthread_rwlock_unlock.c
+++ b/support/xpthread_rwlock_unlock.c
@@ -1,5 +1,5 @@
 /* pthread_rwlock_unlock with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_rwlock_wrlock.c b/support/xpthread_rwlock_wrlock.c
index 8d25d5b818..0de37146c3 100644
--- a/support/xpthread_rwlock_wrlock.c
+++ b/support/xpthread_rwlock_wrlock.c
@@ -1,5 +1,5 @@
 /* pthread_rwlock_wrlock with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_rwlockattr_init.c b/support/xpthread_rwlockattr_init.c
index 48baf247f3..96ac47d777 100644
--- a/support/xpthread_rwlockattr_init.c
+++ b/support/xpthread_rwlockattr_init.c
@@ -1,5 +1,5 @@
 /* pthread_rwlockattr_init with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_rwlockattr_setkind_np.c b/support/xpthread_rwlockattr_setkind_np.c
index 958aace9f6..34aa3df0a9 100644
--- a/support/xpthread_rwlockattr_setkind_np.c
+++ b/support/xpthread_rwlockattr_setkind_np.c
@@ -1,5 +1,5 @@
 /* pthread_rwlockattr_setkind_np with error checking.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_sigmask.c b/support/xpthread_sigmask.c
index 0ba9ca02dc..1fb91dcc20 100644
--- a/support/xpthread_sigmask.c
+++ b/support/xpthread_sigmask.c
@@ -1,5 +1,5 @@
 /* pthread_sigmask with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_spin_lock.c b/support/xpthread_spin_lock.c
index 6975215b17..4cadbf70f9 100644
--- a/support/xpthread_spin_lock.c
+++ b/support/xpthread_spin_lock.c
@@ -1,5 +1,5 @@
 /* pthread_spin_lock with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xpthread_spin_unlock.c b/support/xpthread_spin_unlock.c
index 4f19a44c48..194613993a 100644
--- a/support/xpthread_spin_unlock.c
+++ b/support/xpthread_spin_unlock.c
@@ -1,5 +1,5 @@
 /* pthread_spin_unlock with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xraise.c b/support/xraise.c
index 9126c6c3ea..1901e741eb 100644
--- a/support/xraise.c
+++ b/support/xraise.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for raise.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xreadlink.c b/support/xreadlink.c
index aec58a2aa6..c6386491db 100644
--- a/support/xreadlink.c
+++ b/support/xreadlink.c
@@ -1,5 +1,5 @@
 /* Error-checking, allocating wrapper for readlink.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xrealloc.c b/support/xrealloc.c
index 00c313880c..4d9987c9bb 100644
--- a/support/xrealloc.c
+++ b/support/xrealloc.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for realloc.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xrecvfrom.c b/support/xrecvfrom.c
index 17809c4dd2..a1011a5062 100644
--- a/support/xrecvfrom.c
+++ b/support/xrecvfrom.c
@@ -1,5 +1,5 @@
 /* recvfrom with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsendto.c b/support/xsendto.c
index 20bddf6965..f51530793e 100644
--- a/support/xsendto.c
+++ b/support/xsendto.c
@@ -1,5 +1,5 @@
 /* sendto with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsetsockopt.c b/support/xsetsockopt.c
index 9931882e75..b7c07f21f9 100644
--- a/support/xsetsockopt.c
+++ b/support/xsetsockopt.c
@@ -1,5 +1,5 @@
 /* setsockopt with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsigaction.c b/support/xsigaction.c
index b74c69afae..51657de2b7 100644
--- a/support/xsigaction.c
+++ b/support/xsigaction.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for sigaction.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsignal.c b/support/xsignal.c
index 22a1dd74a7..e7369f0324 100644
--- a/support/xsignal.c
+++ b/support/xsignal.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for signal.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsignal.h b/support/xsignal.h
index 3087ed0082..9ab8d1bfdd 100644
--- a/support/xsignal.h
+++ b/support/xsignal.h
@@ -1,5 +1,5 @@
 /* Support functionality for using signals.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsocket.c b/support/xsocket.c
index c1deaee924..20282fb810 100644
--- a/support/xsocket.c
+++ b/support/xsocket.c
@@ -1,5 +1,5 @@
 /* socket with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsocket.h b/support/xsocket.h
index d6724948d8..9673abdf54 100644
--- a/support/xsocket.h
+++ b/support/xsocket.h
@@ -1,5 +1,5 @@
 /* Error-checking wrappers for socket functions.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xstdio.h b/support/xstdio.h
index bcc2e863bf..e7d0274474 100644
--- a/support/xstdio.h
+++ b/support/xstdio.h
@@ -1,5 +1,5 @@
 /* Error-checking wrappers for stdio functions.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xstrdup.c b/support/xstrdup.c
index d6a8c04baf..89eee8584e 100644
--- a/support/xstrdup.c
+++ b/support/xstrdup.c
@@ -1,5 +1,5 @@
 /* strdup with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xstrndup.c b/support/xstrndup.c
index d59a283d25..e85fddd439 100644
--- a/support/xstrndup.c
+++ b/support/xstrndup.c
@@ -1,5 +1,5 @@
 /* strndup with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xsysconf.c b/support/xsysconf.c
index 15ab1e26c4..afefc2d098 100644
--- a/support/xsysconf.c
+++ b/support/xsysconf.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for sysconf.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xthread.h b/support/xthread.h
index 472763ebe8..79358e7c99 100644
--- a/support/xthread.h
+++ b/support/xthread.h
@@ -1,5 +1,5 @@
 /* Support functionality for using threads.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xunistd.h b/support/xunistd.h
index 29da063c15..5fe5dae818 100644
--- a/support/xunistd.h
+++ b/support/xunistd.h
@@ -1,5 +1,5 @@
 /* POSIX-specific extra functions.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xunlink.c b/support/xunlink.c
index f94ee118cf..2ff9296fca 100644
--- a/support/xunlink.c
+++ b/support/xunlink.c
@@ -1,5 +1,5 @@
 /* Error-checking wrapper for unlink.
-   Copyright (C) 2017 Free Software Foundation, Inc.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xwaitpid.c b/support/xwaitpid.c
index 204795e4c0..1cb039ca17 100644
--- a/support/xwaitpid.c
+++ b/support/xwaitpid.c
@@ -1,5 +1,5 @@
 /* waitpid with error checking.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/support/xwrite.c b/support/xwrite.c
index 134e8ee4c1..bbaae9130a 100644
--- a/support/xwrite.c
+++ b/support/xwrite.c
@@ -1,5 +1,5 @@
 /* write with error checking and retries.
-   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or

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2018-01-01  0:00 [COMMITTED 2.26] Synchronize support/ infrastructure with master Florian Weimer

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