text: /* Tests for AIO in librt.
     Copyright (C) 1998-2020 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
     Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
  
     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
     <https://www.gnu.org/licenses/>.  */
  
  #include <aio.h>
  #include <errno.h>
  #include <error.h>
  #include <fcntl.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  #include <sys/stat.h>
  
  
  /* Prototype for our test function.  */
  extern void do_prepare (int argc, char *argv[]);
  extern int do_test (int argc, char *argv[]);
  
  /* We have a preparation function.  */
  #define PREPARE do_prepare
  
  /* This defines the `main' function and some more.  */
  #include <test-skeleton.c>
  
  
  /* These are for the temporary file we generate.  */
  char *name;
  int fd;
  
  void
  do_prepare (int argc, char *argv[])
  {
    size_t name_len;
  
    name_len = strlen (test_dir);
    name = xmalloc (name_len + sizeof ("/aioXXXXXX"));
    mempcpy (mempcpy (name, test_dir, name_len),
  	   "/aioXXXXXX", sizeof ("/aioXXXXXX"));
  
    /* Open our test file.   */
    fd = mkstemp (name);
    if (fd == -1)
      error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
    add_temp_file (name);
  }
  
  
  static int
  test_file (const void *buf, size_t size, int fd, const char *msg)
  {
    struct stat st;
    char tmp[size];
  
    errno = 0;
    if (fstat (fd, &st) < 0)
      {
        error (0, errno, "%s: failed stat", msg);
        return 1;
      }
  
    if (st.st_size != (off_t) size)
      {
        error (0, errno, "%s: wrong size: %lu, should be %lu",
  	     msg, (unsigned long int) st.st_size, (unsigned long int) size);
        return 1;
      }
  
    if (pread (fd, tmp, size, 0) != (ssize_t) size)
      {
        error (0, errno, "%s: failed pread", msg);
        return 1;
      }
  
    if (memcmp (buf, tmp, size) != 0)
      {
        error (0, errno, "%s: failed comparison", msg);
        return 1;
      }
  
    printf ("%s test ok\n", msg);
  
    return 0;
  }
  
  
  static int
  do_wait (struct aiocb **cbp, size_t nent, int allowed_err)
  {
    int go_on;
    size_t cnt;
    int result = 0;
  
    do
      {
        aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);
        go_on = 0;
        for (cnt = 0; cnt < nent; ++cnt)
  	if (cbp[cnt] != NULL)
  	  {
  	    if (aio_error (cbp[cnt]) == EINPROGRESS)
  	      go_on = 1;
  	    else
  	      {
  		if (aio_return (cbp[cnt]) == -1
  		    && (allowed_err == 0
  			|| aio_error (cbp[cnt]) != allowed_err))
  		  {
  		    error (0, aio_error (cbp[cnt]), "Operation failed\n");
  		    result = 1;
  		  }
  		cbp[cnt] = NULL;
  	      }
  	  }
      }
    while (go_on);
  
    return result;
  }
  
  
  int
  do_test (int argc, char *argv[])
  {
    struct aiocb cbs[10];
    struct aiocb cbs_fsync;
    struct aiocb *cbp[10];
    struct aiocb *cbp_fsync[1];
    char buf[1000];
    size_t cnt;
    int result = 0;
  
    /* Preparation.  */
    for (cnt = 0; cnt < 10; ++cnt)
      {
        cbs[cnt].aio_fildes = fd;
        cbs[cnt].aio_reqprio = 0;
        cbs[cnt].aio_buf = memset (&buf[cnt * 100], '0' + cnt, 100);
        cbs[cnt].aio_nbytes = 100;
        cbs[cnt].aio_offset = cnt * 100;
        cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;
  
        cbp[cnt] = &cbs[cnt];
      }
  
    /* First a simple test.  */
    for (cnt = 10; cnt > 0; )
      if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)
        {
  	error (0, 0, "no aio support in this configuration");
  	return 0;
        }
    /* Wait 'til the results are there.  */
    result |= do_wait (cbp, 10, 0);
    /* Test this.  */
    result |= test_file (buf, sizeof (buf), fd, "aio_write");
  
    /* Read now as we've written it.  */
    memset (buf, '\0', sizeof (buf));
    /* Issue the commands.  */
    for (cnt = 10; cnt > 0; )
      {
        --cnt;
        cbp[cnt] = &cbs[cnt];
        aio_read (cbp[cnt]);
      }
    /* Wait 'til the results are there.  */
    result |= do_wait (cbp, 10, 0);
    /* Test this.  */
    for (cnt = 0; cnt < 1000; ++cnt)
      if (buf[cnt] != '0' + (cnt / 100))
        {
  	result = 1;
  	error (0, 0, "comparison failed for aio_read test");
  	break;
        }
  
    if (cnt == 1000)
      puts ("aio_read test ok");
  
    /* Remove the test file contents.  */
    if (ftruncate (fd, 0) < 0)
      {
        error (0, errno, "ftruncate failed\n");
        result = 1;
      }
  
    /* Test lio_listio.  */
    for (cnt = 0; cnt < 10; ++cnt)
      {
        cbs[cnt].aio_lio_opcode = LIO_WRITE;
        cbp[cnt] = &cbs[cnt];
      }
    /* Issue the command.  */
    lio_listio (LIO_WAIT, cbp, 10, NULL);
    /* ...and immediately test it since we started it in wait mode.  */
    result |= test_file (buf, sizeof (buf), fd, "lio_listio (write)");
  
    /* Test aio_fsync.  */
    cbs_fsync.aio_fildes = fd;
    cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;
    cbp_fsync[0] = &cbs_fsync;
  
    /* Remove the test file contents first.  */
    if (ftruncate (fd, 0) < 0)
      {
        error (0, errno, "ftruncate failed\n");
        result = 1;
      }
  
    /* Write again.  */
    for (cnt = 10; cnt > 0; )
      aio_write (cbp[--cnt]);
  
    if (aio_fsync (O_SYNC, &cbs_fsync) < 0)
      {
        error (0, errno, "aio_fsync failed\n");
        result = 1;
      }
    result |= do_wait (cbp_fsync, 1, 0);
  
    /* ...and test since all data should be on disk now.  */
    result |= test_file (buf, sizeof (buf), fd, "aio_fsync (aio_write)");
  
    /* Test aio_cancel.  */
    /* Remove the test file contents first.  */
    if (ftruncate (fd, 0) < 0)
      {
        error (0, errno, "ftruncate failed\n");
        result = 1;
      }
  
    /* Write again.  */
    for (cnt = 10; cnt > 0; )
      aio_write (cbp[--cnt]);
  
    /* Cancel all requests.  */
    if (aio_cancel (fd, NULL) == -1)
      printf ("aio_cancel (fd, NULL) cannot cancel anything\n");
  
    result |= do_wait (cbp, 10, ECANCELED);
  
    /* Another test for aio_cancel.  */
    /* Remove the test file contents first.  */
    if (ftruncate (fd, 0) < 0)
      {
        error (0, errno, "ftruncate failed\n");
        result = 1;
      }
  
    /* Write again.  */
    for (cnt = 10; cnt > 0; )
      {
        --cnt;
        cbp[cnt] = &cbs[cnt];
        aio_write (cbp[cnt]);
      }
    puts ("finished3");
  
    /* Cancel all requests.  */
    for (cnt = 10; cnt > 0; )
      if (aio_cancel (fd, cbp[--cnt]) == -1)
        /* This is not an error.  The request can simply be finished.  */
        printf ("aio_cancel (fd, cbp[%Zd]) cannot be canceled\n", cnt);
    puts ("finished2");
  
    result |= do_wait (cbp, 10, ECANCELED);
  
    puts ("finished");
  
    return result;
  }
  