diff --git a/dirent/tst-fdopendir.c b/dirent/tst-fdopendir.c
index 6321af1daa..2c9520574d 100644
--- a/dirent/tst-fdopendir.c
+++ b/dirent/tst-fdopendir.c
@@ -7,6 +7,8 @@
 #include <string.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
+
 #ifndef O_NOATIME
 # define O_NOATIME	0
 #endif
@@ -22,7 +24,7 @@ do_test (void)
       return 1;
     }
 
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   close (fd);
 
   struct stat64 st;
diff --git a/io/tst-faccessat.c b/io/tst-faccessat.c
index 7bdeed008c..b90954e318 100644
--- a/io/tst-faccessat.c
+++ b/io/tst-faccessat.c
@@ -8,6 +8,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -96,7 +97,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   /* Before closing the file, try using this file descriptor to open
diff --git a/io/tst-fchmodat.c b/io/tst-fchmodat.c
index 7d4a8717ff..83003e2f21 100644
--- a/io/tst-fchmodat.c
+++ b/io/tst-fchmodat.c
@@ -8,6 +8,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -98,7 +99,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct stat64 st1;
diff --git a/io/tst-fchownat.c b/io/tst-fchownat.c
index e8adf6229f..c0b87cda8f 100644
--- a/io/tst-fchownat.c
+++ b/io/tst-fchownat.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -106,7 +107,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct stat64 st1;
diff --git a/io/tst-fstatat.c b/io/tst-fstatat.c
index 4766bb2e71..6a60024b63 100644
--- a/io/tst-fstatat.c
+++ b/io/tst-fstatat.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -94,7 +95,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct stat64 st1;
diff --git a/io/tst-futimesat.c b/io/tst-futimesat.c
index 3d41721f42..b7ef386e06 100644
--- a/io/tst-futimesat.c
+++ b/io/tst-futimesat.c
@@ -28,6 +28,7 @@
 
 #include <support/test-driver.h>
 #include <support/temp_file.h>
+#include <support/xunistd.h>
 
 #ifndef struct_stat
 # define struct_stat struct stat64
@@ -114,7 +115,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct_stat st1;
diff --git a/io/tst-linkat.c b/io/tst-linkat.c
index 97445b7954..6b22a01c88 100644
--- a/io/tst-linkat.c
+++ b/io/tst-linkat.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -94,7 +95,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct stat64 st1;
diff --git a/io/tst-openat.c b/io/tst-openat.c
index 741b8d0ad2..2ce89e3db1 100644
--- a/io/tst-openat.c
+++ b/io/tst-openat.c
@@ -6,6 +6,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -94,7 +95,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
 
   /* Before closing the file, try using this file descriptor to open
      another file.  This must fail.  */
diff --git a/io/tst-renameat.c b/io/tst-renameat.c
index 435302b52b..0b9da5fd6d 100644
--- a/io/tst-renameat.c
+++ b/io/tst-renameat.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -94,7 +95,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct stat64 st1;
diff --git a/io/tst-symlinkat.c b/io/tst-symlinkat.c
index 214a8e348e..4a34994df7 100644
--- a/io/tst-symlinkat.c
+++ b/io/tst-symlinkat.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -94,7 +95,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   puts ("file created");
 
   struct stat64 st1;
diff --git a/io/tst-unlinkat.c b/io/tst-unlinkat.c
index e21d56f9f7..21a2dbaf57 100644
--- a/io/tst-unlinkat.c
+++ b/io/tst-unlinkat.c
@@ -6,6 +6,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <support/xunistd.h>
 
 static void prepare (void);
 #define PREPARE(argc, argv) prepare ()
@@ -94,7 +95,7 @@ do_test (void)
       puts ("file creation failed");
       return 1;
     }
-  write (fd, "hello", 5);
+  xwrite (fd, "hello", 5);
   close (fd);
   puts ("file created");
 
diff --git a/libio/bug-ungetc.c b/libio/bug-ungetc.c
index 51940b68f5..4ea2d14ed6 100644
--- a/libio/bug-ungetc.c
+++ b/libio/bug-ungetc.c
@@ -2,6 +2,8 @@
 
 #include <stdio.h>
 
+#include <support/xunistd.h>
+
 static void do_prepare (void);
 #define PREPARE(argc, argv) do_prepare ()
 static int do_test (void);
@@ -20,7 +22,7 @@ do_prepare (void)
       printf ("cannot create temporary file: %m\n");
       exit (1);
     }
-  write (fd, pattern, sizeof (pattern));
+  xwrite (fd, pattern, sizeof (pattern));
   close (fd);
 }
 
diff --git a/libio/bug-ungetc3.c b/libio/bug-ungetc3.c
index 0c83c1161e..6100d7a936 100644
--- a/libio/bug-ungetc3.c
+++ b/libio/bug-ungetc3.c
@@ -2,6 +2,8 @@
 
 #include <stdio.h>
 
+#include <support/xunistd.h>
+
 static void do_prepare (void);
 #define PREPARE(argc, argv) do_prepare ()
 static int do_test (void);
@@ -20,7 +22,7 @@ do_prepare (void)
       printf ("cannot create temporary file: %m\n");
       exit (1);
     }
-  write (fd, pattern, sizeof (pattern));
+  xwrite (fd, pattern, sizeof (pattern));
   close (fd);
 }
 
diff --git a/libio/bug-ungetc4.c b/libio/bug-ungetc4.c
index 0bd02a570d..8a05def686 100644
--- a/libio/bug-ungetc4.c
+++ b/libio/bug-ungetc4.c
@@ -18,6 +18,8 @@
 
 #include <stdio.h>
 
+#include <support/xunistd.h>
+
 static void do_prepare (void);
 #define PREPARE(argc, argv) do_prepare ()
 static int do_test (void);
@@ -36,7 +38,7 @@ do_prepare (void)
       printf ("cannot create temporary file: %m\n");
       exit (1);
     }
-  write (fd, pattern, sizeof (pattern) - 1);
+  xwrite (fd, pattern, sizeof (pattern) - 1);
   close (fd);
 }
 
diff --git a/libio/bug-wfflush.c b/libio/bug-wfflush.c
index a8fd61e997..d1b9d8e9de 100644
--- a/libio/bug-wfflush.c
+++ b/libio/bug-wfflush.c
@@ -3,6 +3,8 @@
 #include <stdio.h>
 #include <wchar.h>
 
+#include <support/xunistd.h>
+
 static void do_prepare (void);
 #define PREPARE(argc, argv) do_prepare ()
 static int do_test (void);
@@ -20,7 +22,7 @@ do_prepare (void)
       printf ("cannot create temporary file: %m\n");
       exit (1);
     }
-  write (fd, "1!", 2);
+  xwrite (fd, "1!", 2);
   close (fd);
 }
 
diff --git a/libio/bug-wsetpos.c b/libio/bug-wsetpos.c
index ccb22a4b62..0fc373ba49 100644
--- a/libio/bug-wsetpos.c
+++ b/libio/bug-wsetpos.c
@@ -4,6 +4,8 @@
 #include <stdio.h>
 #include <wchar.h>
 
+#include <support/xunistd.h>
+
 static void do_prepare (void);
 #define PREPARE(argc, argv) do_prepare ()
 static int do_test (void);
@@ -22,7 +24,7 @@ do_prepare (void)
       printf ("cannot create temporary file: %m\n");
       exit (1);
     }
-  write (fd, pattern, sizeof (pattern));
+  xwrite (fd, pattern, sizeof (pattern));
   close (fd);
 }
 
diff --git a/nptl/tst-stackguard1.c b/nptl/tst-stackguard1.c
index b9cf6844de..4ac57157e9 100644
--- a/nptl/tst-stackguard1.c
+++ b/nptl/tst-stackguard1.c
@@ -27,6 +27,8 @@
 #include <tls.h>
 #include <unistd.h>
 
+#include <support/xunistd.h>
+
 static const char *command;
 static bool child;
 static uintptr_t stack_chk_guard_copy;
@@ -96,7 +98,7 @@ do_test (void)
 	else if (ret != NULL)
 	  return 1;
 
-      write (2, &stack_chk_guard_copy, sizeof (stack_chk_guard_copy));
+      xwrite (2, &stack_chk_guard_copy, sizeof (stack_chk_guard_copy));
       return 0;
     }
 
diff --git a/nptl/tst-tls3.c b/nptl/tst-tls3.c
index b1a40c624a..33d94c8cc5 100644
--- a/nptl/tst-tls3.c
+++ b/nptl/tst-tls3.c
@@ -26,6 +26,8 @@
 #include <unistd.h>
 #include <pthreaddef.h>
 
+#include <support/xunistd.h>
+
 #define THE_SIG SIGUSR1
 
 /* The stack size can be overriden.  With a sufficiently large stack
diff --git a/nptl/tst-tls3mod.c b/nptl/tst-tls3mod.c
index c6e8910b1e..345a48e1c7 100644
--- a/nptl/tst-tls3mod.c
+++ b/nptl/tst-tls3mod.c
@@ -25,6 +25,7 @@
 #include <pthreaddef.h>
 #include <descr.h>
 
+#include <support/xunistd.h>
 
 extern pthread_barrier_t b;
 
@@ -43,7 +44,7 @@ handler (int sig)
 {
   if (sig != THE_SIG)
     {
-      write (STDOUT_FILENO, "wrong signal\n", 13);
+      xwrite (STDOUT_FILENO, "wrong signal\n", 13);
       _exit (1);
     }
 
@@ -51,7 +52,7 @@ handler (int sig)
 
   if (sem_post (&s) != 0)
     {
-      write (STDOUT_FILENO, "sem_post failed\n", 16);
+      xwrite (STDOUT_FILENO, "sem_post failed\n", 16);
       _exit (1);
     }
 }
diff --git a/rt/tst-cpuclock2.c b/rt/tst-cpuclock2.c
index e4584d8791..8afd34ed9c 100644
--- a/rt/tst-cpuclock2.c
+++ b/rt/tst-cpuclock2.c
@@ -37,6 +37,8 @@ do_test ()
 #include <errno.h>
 #include <pthread.h>
 
+#include <support/xunistd.h>
+
 static pthread_barrier_t barrier;
 
 /* This function is intended to rack up both user and system time.  */
@@ -55,7 +57,7 @@ chew_cpu (void *arg)
       for (int i = 0; i < 100; ++i)
 	for (size_t j = 0; j < sizeof buf; ++j)
 	  buf[j] = 0xbb;
-      write (nullfd, (char *) buf, sizeof buf);
+      xwrite (nullfd, (char *) buf, sizeof buf);
       close (nullfd);
     }
 
diff --git a/rt/tst-cputimer1.c b/rt/tst-cputimer1.c
index 8f5dd76cf2..18d8b195a2 100644
--- a/rt/tst-cputimer1.c
+++ b/rt/tst-cputimer1.c
@@ -11,6 +11,8 @@
 #include <time.h>
 #include <pthread.h>
 
+#include <support/xunistd.h>
+
 #define TEST_CLOCK CLOCK_PROCESS_CPUTIME_ID
 #define TEST_CLOCK_MISSING(clock) \
   (setup_test () ? "process CPU clock timer support" : NULL)
@@ -29,7 +31,7 @@ chew_cpu (void *arg)
       for (int i = 0; i < 100; ++i)
 	for (size_t j = 0; j < sizeof buf; ++j)
 	  buf[j] = 0xbb;
-      write (nullfd, (char *) buf, sizeof buf);
+      xwrite (nullfd, (char *) buf, sizeof buf);
       close (nullfd);
     }
 
diff --git a/rt/tst-cputimer2.c b/rt/tst-cputimer2.c
index 397d7998c0..a5700d4bac 100644
--- a/rt/tst-cputimer2.c
+++ b/rt/tst-cputimer2.c
@@ -12,6 +12,8 @@
 #include <time.h>
 #include <pthread.h>
 
+#include <support/xunistd.h>
+
 static clockid_t worker_thread_clock;
 
 #define TEST_CLOCK worker_thread_clock
@@ -32,7 +34,7 @@ chew_cpu (void *arg)
       for (int i = 0; i < 100; ++i)
 	for (size_t j = 0; j < sizeof buf; ++j)
 	  buf[j] = 0xbb;
-      write (nullfd, (char *) buf, sizeof buf);
+      xwrite (nullfd, (char *) buf, sizeof buf);
       close (nullfd);
     }
 
diff --git a/rt/tst-cputimer3.c b/rt/tst-cputimer3.c
index 056766a377..786de93a02 100644
--- a/rt/tst-cputimer3.c
+++ b/rt/tst-cputimer3.c
@@ -13,6 +13,8 @@
 #include <signal.h>
 #include <sys/wait.h>
 
+#include <support/xunistd.h>
+
 static clockid_t child_clock;
 
 #define TEST_CLOCK child_clock
@@ -33,7 +35,7 @@ chew_cpu (void)
       for (int i = 0; i < 100; ++i)
 	for (size_t j = 0; j < sizeof buf; ++j)
 	  buf[j] = 0xbb;
-      write (nullfd, (char *) buf, sizeof buf);
+      xwrite (nullfd, (char *) buf, sizeof buf);
       close (nullfd);
       if (getppid () == 1)
 	_exit (2);
diff --git a/support/test-container.c b/support/test-container.c
index e68f16eecf..d4ca41fe7c 100644
--- a/support/test-container.c
+++ b/support/test-container.c
@@ -1186,7 +1186,7 @@ main (int argc, char **argv)
       int status;
 
       /* Send the child's "outside" pid to it.  */
-      write (pipes[1], &child, sizeof(child));
+      xwrite (pipes[1], &child, sizeof(child));
       close (pipes[0]);
       close (pipes[1]);
 
@@ -1255,7 +1255,7 @@ main (int argc, char **argv)
 
       sprintf (tmp, "%lld %lld 1\n",
 	       (long long) (be_su ? 0 : original_uid), (long long) original_uid);
-      write (UMAP, tmp, strlen (tmp));
+      xwrite (UMAP, tmp, strlen (tmp));
       xclose (UMAP);
 
       /* We must disable setgroups () before we can map our groups, else we
@@ -1264,7 +1264,7 @@ main (int argc, char **argv)
       if (GMAP >= 0)
 	{
 	  /* We support kernels old enough to not have this.  */
-	  write (GMAP, "deny\n", 5);
+	  xwrite (GMAP, "deny\n", 5);
 	  xclose (GMAP);
 	}
 
@@ -1276,7 +1276,7 @@ main (int argc, char **argv)
 
       sprintf (tmp, "%lld %lld 1\n",
 	       (long long) (be_su ? 0 : original_gid), (long long) original_gid);
-      write (GMAP, tmp, strlen (tmp));
+      xwrite (GMAP, tmp, strlen (tmp));
       xclose (GMAP);
     }
 
diff --git a/sysdeps/pthread/tst-cond18.c b/sysdeps/pthread/tst-cond18.c
index edac4fa4ff..ffae356c04 100644
--- a/sysdeps/pthread/tst-cond18.c
+++ b/sysdeps/pthread/tst-cond18.c
@@ -24,6 +24,8 @@
 #include <stdio.h>
 #include <unistd.h>
 
+#include <support/xunistd.h>
+
 pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
 bool exiting;
@@ -40,7 +42,7 @@ tf (void *id)
       while (!exiting)
 	{
 	  if ((spins++ % 1000) == 0)
-	    write (fd, ".", 1);
+	    xwrite (fd, ".", 1);
 	  pthread_mutex_unlock (&lock);
 
 	  pthread_mutex_lock (&lock);
diff --git a/sysdeps/pthread/tst-flock1.c b/sysdeps/pthread/tst-flock1.c
index 7eef9070ab..9de148afd3 100644
--- a/sysdeps/pthread/tst-flock1.c
+++ b/sysdeps/pthread/tst-flock1.c
@@ -21,6 +21,7 @@
 #include <unistd.h>
 #include <sys/file.h>
 
+#include <support/xunistd.h>
 
 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
 
@@ -56,7 +57,7 @@ do_test (void)
 
   unlink (tmp);
 
-  write (fd, "foobar xyzzy", 12);
+  xwrite (fd, "foobar xyzzy", 12);
 
   if (flock (fd, LOCK_EX | LOCK_NB) != 0)
     {
diff --git a/sysdeps/pthread/tst-flock2.c b/sysdeps/pthread/tst-flock2.c
index 8762e93b52..952b79e5db 100644
--- a/sysdeps/pthread/tst-flock2.c
+++ b/sysdeps/pthread/tst-flock2.c
@@ -24,6 +24,7 @@
 #include <sys/mman.h>
 #include <sys/wait.h>
 
+#include <support/xunistd.h>
 
 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
 static pthread_mutex_t lock2 = PTHREAD_MUTEX_INITIALIZER;
@@ -70,7 +71,7 @@ do_test (void)
 
   int i;
   for (i = 0; i < 20; ++i)
-    write (fd, "foobar xyzzy", 12);
+    xwrite (fd, "foobar xyzzy", 12);
 
   pthread_barrier_t *b;
   b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
diff --git a/sysdeps/pthread/tst-key1.c b/sysdeps/pthread/tst-key1.c
index 933edafef8..60245c4e47 100644
--- a/sysdeps/pthread/tst-key1.c
+++ b/sysdeps/pthread/tst-key1.c
@@ -21,6 +21,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 
+#include <support/xunistd.h>
 
 static int do_test (void);
 
@@ -51,7 +52,7 @@ do_test (void)
 
 	if (pthread_setspecific (keys[i], (const void *) (i + 100l)) != 0)
 	  {
-	    write (2, "setspecific failed\n", 19);
+	    xwrite (2, "setspecific failed\n", 19);
 	    _exit (1);
 	  }
       }
@@ -60,13 +61,13 @@ do_test (void)
     {
       if (pthread_getspecific (keys[i]) != (void *) (i + 100l))
 	{
-	  write (2, "getspecific failed\n", 19);
+	  xwrite (2, "getspecific failed\n", 19);
 	  _exit (1);
 	}
 
       if (pthread_key_delete (keys[i]) != 0)
 	{
-	  write (2, "key_delete failed\n", 18);
+	  xwrite (2, "key_delete failed\n", 18);
 	  _exit (1);
 	}
     }
@@ -74,13 +75,13 @@ do_test (void)
   /* Now it must be once again possible to allocate keys.  */
   if (pthread_key_create (&keys[0], NULL) != 0)
     {
-      write (2, "2nd key_create failed\n", 22);
+      xwrite (2, "2nd key_create failed\n", 22);
       _exit (1);
     }
 
   if (pthread_key_delete (keys[0]) != 0)
     {
-      write (2, "2nd key_delete failed\n", 22);
+      xwrite (2, "2nd key_delete failed\n", 22);
       _exit (1);
     }
 
diff --git a/sysdeps/pthread/tst-signal1.c b/sysdeps/pthread/tst-signal1.c
index d1073e8459..d1082027ca 100644
--- a/sysdeps/pthread/tst-signal1.c
+++ b/sysdeps/pthread/tst-signal1.c
@@ -25,6 +25,7 @@
 #include <sys/mman.h>
 #include <sys/wait.h>
 
+#include <support/xunistd.h>
 
 static sigset_t ss;
 static pthread_barrier_t *b;
@@ -105,7 +106,7 @@ do_test (void)
 
   int i;
   for (i = 0; i < 20; ++i)
-    write (fd, "foobar xyzzy", 12);
+    xwrite (fd, "foobar xyzzy", 12);
 
   b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
 	    MAP_SHARED, fd, 0);
diff --git a/sysdeps/pthread/tst-signal2.c b/sysdeps/pthread/tst-signal2.c
index dfe7d9f64a..15b7747877 100644
--- a/sysdeps/pthread/tst-signal2.c
+++ b/sysdeps/pthread/tst-signal2.c
@@ -25,6 +25,7 @@
 #include <sys/wait.h>
 #include <string.h>
 
+#include <support/xunistd.h>
 
 static sigset_t ss;
 static pthread_barrier_t *b;
@@ -111,7 +112,7 @@ do_test (void)
 
   int i;
   for (i = 0; i < 20; ++i)
-    write (fd, "foobar xyzzy", 12);
+    xwrite (fd, "foobar xyzzy", 12);
 
   b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
 	    MAP_SHARED, fd, 0);
diff --git a/sysdeps/pthread/tst-timer.c b/sysdeps/pthread/tst-timer.c
index 47472ab8e1..4cfe0b67dc 100644
--- a/sysdeps/pthread/tst-timer.c
+++ b/sysdeps/pthread/tst-timer.c
@@ -24,6 +24,7 @@
 #include <stdlib.h>
 #include <stdint.h>
 
+#include <support/xunistd.h>
 
 static void
 notify_func1 (union sigval sigval)
@@ -44,7 +45,7 @@ signal_func (int sig)
 {
   static const char text[] = "signal_func\n";
   signal (sig, signal_func);
-  write (STDOUT_FILENO, text, sizeof text - 1);
+  xwrite (STDOUT_FILENO, text, sizeof text - 1);
 }
 
 static void
diff --git a/time/tst-cpuclock1.c b/time/tst-cpuclock1.c
index 6f2e70a58a..6a793e06df 100644
--- a/time/tst-cpuclock1.c
+++ b/time/tst-cpuclock1.c
@@ -27,6 +27,8 @@
 #include <stdint.h>
 #include <sys/wait.h>
 
+#include <support/xunistd.h>
+
 /* This function is intended to rack up both user and system time.  */
 static void
 chew_cpu (void)
@@ -41,7 +43,7 @@ chew_cpu (void)
       for (int i = 0; i < 100; ++i)
 	for (size_t j = 0; j < sizeof buf; ++j)
 	  buf[j] = 0xbb;
-      write (nullfd, (char *) buf, sizeof buf);
+      xwrite (nullfd, (char *) buf, sizeof buf);
       close (nullfd);
       if (getppid () == 1)
 	_exit (2);