Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 211 insertions, 0 deletions

diff --git a/REORG.TODO/rt/tst-shm.c b/REORG.TODO/rt/tst-shm.c
new file mode 100644
index 0000000000..978674837c
--- /dev/null
+++ b/REORG.TODO/rt/tst-shm.c
@@ -0,0 +1,211 @@
+/* Test program for POSIX shm_* functions.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+
+/* We want to see output immediately.  */
+#define STDOUT_UNBUFFERED
+
+static void
+worker (int write_now)
+{
+  struct timespec ts;
+  struct stat64 st;
+  int i;
+  int fd = shm_open ("/glibc-shm-test", O_RDWR, 0600);
+
+  if (fd == -1)
+    error (EXIT_FAILURE, 0, "failed to open shared memory object: shm_open");
+
+  char *mem;
+
+  if (fd == -1)
+    exit (fd);
+
+  if (fstat64 (fd, &st) == -1)
+    error (EXIT_FAILURE, 0, "stat failed");
+  if (st.st_size != 4000)
+    error (EXIT_FAILURE, 0, "size incorrect");
+
+  mem = mmap (NULL, 4000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+  if (mem == MAP_FAILED)
+    error (EXIT_FAILURE, 0, "mmap failed");
+
+  ts.tv_sec = 0;
+  ts.tv_nsec = 500000000;
+
+  if (write_now)
+    for (i = 0; i <= 4; ++i)
+      mem[i] = i;
+  else
+    /* Wait until the first bytes of the memory region are 0, 1, 2, 3, 4.  */
+    while (1)
+      {
+	for (i = 0; i <= 4; ++i)
+	  if (mem[i] != i)
+	    break;
+
+	if (i > 4)
+	  /* OK, that's done.  */
+	  break;
+
+	nanosleep (&ts, NULL);
+      }
+
+  if (!write_now)
+    for (i = 0; i <= 4; ++i)
+      mem[i] = 4 + i;
+  else
+    /* Wait until the first bytes of the memory region are 4, 5, 6, 7, 8.  */
+    while (1)
+      {
+	for (i = 0; i <= 4; ++i)
+	  if (mem[i] != 4 + i)
+	    break;
+
+	if (i > 4)
+	  /* OK, that's done.  */
+	  break;
+
+	nanosleep (&ts, NULL);
+      }
+
+  if (munmap (mem, 4000) == -1)
+    error (EXIT_FAILURE, errno, "munmap");
+
+  close (fd);
+
+  exit (0);
+}
+
+
+static int
+do_test (void)
+{
+  int fd;
+  pid_t pid1;
+  pid_t pid2;
+  int status1;
+  int status2;
+  struct stat64 st;
+
+  fd = shm_open ("/../escaped", O_RDWR | O_CREAT | O_TRUNC | O_EXCL, 0600);
+  if (fd != -1)
+    {
+      perror ("read file outside of SHMDIR directory");
+      return 1;
+    }
+
+
+  /* Create the shared memory object.  */
+  fd = shm_open ("/glibc-shm-test", O_RDWR | O_CREAT | O_TRUNC | O_EXCL, 0600);
+  if (fd == -1)
+    {
+      /* If shm_open is unimplemented we skip the test.  */
+      if (errno == ENOSYS)
+        {
+	  perror ("shm_open unimplemented.  Test skipped.");
+          return 0;
+        }
+      else
+        error (EXIT_FAILURE, 0, "failed to create shared memory object: shm_open");
+    }
+
+  /* Size the object.  We make it 4000 bytes long.  */
+  if (ftruncate (fd, 4000) == -1)
+    {
+      /* This failed.  Must be a bug in the implementation of the
+         shared memory itself.  */
+      perror ("failed to size of shared memory object: ftruncate");
+      close (fd);
+      shm_unlink ("/glibc-shm-test");
+      return 0;
+    }
+
+  if (fstat64 (fd, &st) == -1)
+    {
+      shm_unlink ("/glibc-shm-test");
+      error (EXIT_FAILURE, 0, "initial stat failed");
+    }
+  if (st.st_size != 4000)
+    {
+      shm_unlink ("/glibc-shm-test");
+      error (EXIT_FAILURE, 0, "initial size not correct");
+    }
+
+  /* Spawn to processes which will do the work.  */
+  pid1 = fork ();
+  if (pid1 == 0)
+    worker (0);
+  else if (pid1 == -1)
+    {
+      /* Couldn't create a second process.  */
+      perror ("fork");
+      close (fd);
+      shm_unlink ("/glibc-shm-test");
+      return 0;
+    }
+
+  pid2 = fork ();
+  if (pid2 == 0)
+    worker (1);
+  else if (pid2 == -1)
+    {
+      /* Couldn't create a second process.  */
+      int ignore;
+      perror ("fork");
+      kill (pid1, SIGTERM);
+      waitpid (pid1, &ignore, 0);
+      close (fd);
+      shm_unlink ("/glibc-shm-test");
+      return 0;
+    }
+
+  /* Wait until the two processes are finished.  */
+  waitpid (pid1, &status1, 0);
+  waitpid (pid2, &status2, 0);
+
+  /* Now we can unlink the shared object.  */
+  shm_unlink ("/glibc-shm-test");
+
+  return (!WIFEXITED (status1) || WEXITSTATUS (status1) != 0
+	  || !WIFEXITED (status2) || WEXITSTATUS (status2) != 0);
+}
+
+static void
+cleanup_handler (void)
+{
+  shm_unlink ("/glibc-shm-test");
+}
+
+#define CLEANUP_HANDLER cleanup_handler
+
+#include <support/test-driver.c>