nonblocking.c

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Hash : 44b65c48
Author :
Date : 2018-05-03T23:09:42

Simplify code. Drop support for Borland C++ on Windows.

Reported by Gisle Vanem <gisle.vanem@gmail.com>.

* lib/accept4.c: Simplify 'defined _WIN32 || defined __WIN32__' to just
'defined _WIN32'.
* lib/canonicalize-lgpl.c: Likewise.
* lib/classpath.c: Likewise.
* lib/clean-temp.c: Likewise.
* lib/csharpexec.c: Likewise.
* lib/ctime.c: Likewise.
* lib/dosname.h: Likewise.
* lib/dup2.c: Likewise.
* lib/errno.in.h: Likewise.
* lib/error.c: Likewise.
* lib/euidaccess.c: Likewise.
* lib/execute.c: Likewise.
* lib/fcntl.in.h: Likewise.
* lib/fcntl.c: Likewise.
* lib/filename.h: Likewise.
* lib/findprog.c: Likewise.
* lib/flock.c: Likewise.
* lib/fopen.c: Likewise.
* lib/freopen.c: Likewise.
* lib/fstat.c: Likewise.
* lib/fsync.c: Likewise.
* lib/gc-gnulib.c: Likewise.
* lib/get-rusage-data.c: Likewise.
* lib/getaddrinfo.c: Likewise.
* lib/getdelim.c: Likewise.
* lib/getdtablesize.c: Likewise.
* lib/gethostname.c: Likewise.
* lib/getlogin.c: Likewise.
* lib/getlogin_r.c: Likewise.
* lib/getopt.c: Likewise.
* lib/getpagesize.c: Likewise.
* lib/getpass.c: Likewise.
* lib/getrusage.c: Likewise.
* lib/gettimeofday.c: Likewise.
* lib/glob.c: Likewise.
* lib/inttypes.in.h: Likewise.
* lib/isapipe.c: Likewise.
* lib/javaexec.c: Likewise.
* lib/link.c: Likewise.
* lib/localcharset.c: Likewise.
* lib/localename.h: Likewise.
* lib/localename.c: Likewise.
* lib/localtime.c: Likewise.
* lib/lseek.c: Likewise.
* lib/mbsinit.c: Likewise.
* lib/mkdir.c: Likewise.
* lib/msvc-nothrow.h: Likewise.
* lib/nanosleep.c: Likewise.
* lib/nl_langinfo.c: Likewise.
* lib/nonblocking.c: Likewise.
* lib/nproc.c: Likewise.
* lib/open.c: Likewise.
* lib/openpty.c: Likewise.
* lib/pathmax.h: Likewise.
* lib/pipe-filter-aux.c: Likewise.
* lib/pipe-filter-gi.c: Likewise.
* lib/pipe-filter-ii.c: Likewise.
* lib/pipe.c: Likewise.
* lib/pipe2.c: Likewise.
* lib/poll.c: Likewise.
* lib/popen.c: Likewise.
* lib/posix_openpt.c: Likewise.
* lib/printf-parse.c: Likewise.
* lib/progreloc.c: Likewise.
* lib/putenv.c: Likewise.
* lib/read.c: Likewise.
* lib/relocatable.c: Likewise.
* lib/rename.c: Likewise.
* lib/same-inode.h: Likewise.
* lib/secure_getenv.c: Likewise.
* lib/select.c: Likewise.
* lib/sethostname.c: Likewise.
* lib/setlocale.c: Likewise.
* lib/sigaction.c: Likewise.
* lib/sigprocmask.c: Likewise.
* lib/sleep.c: Likewise.
* lib/spawn-pipe.h: Likewise.
* lib/spawn-pipe.c: Likewise.
* lib/spawni.c: Likewise.
* lib/stat-time.h: Likewise.
* lib/stat-w32.c: Likewise.
* lib/stat.c: Likewise.
* lib/stdio.in.h: Likewise.
* lib/stdio-impl.h: Likewise.
* lib/stdio-read.c: Likewise.
* lib/stdio-write.c: Likewise.
* lib/stdlib.in.h: Likewise.
* lib/strerror_r.c: Likewise.
* lib/strftime-fixes.c: Likewise.
* lib/sys_stat.in.h: Likewise.
* lib/sys_types.in.h: Likewise.
* lib/sys_wait.in.h : Likewise.
* lib/system-quote.h: Likewise.
* lib/system-quote.c: Likewise.
* lib/tmpdir.c: Likewise.
* lib/tzset.c: Likewise.
* lib/uname.c: Likewise.
* lib/unistd.in.h: Likewise.
* lib/utime.in.h: Likewise.
* lib/utime.c: Likewise.
* lib/utimecmp.c: Likewise.
* lib/utimens.c: Likewise.
* lib/vasnprintf.c: Likewise.
* lib/vma-iter.h: Likewise.
* lib/vma-iter.c: Likewise.
* lib/wait-process.c: Likewise.
* lib/wcsftime.c: Likewise.
* lib/wctype.in.h: Likewise.
* lib/write.c: Likewise.
* tests/nap.h: Likewise.
* tests/test-cloexec.c: Likewise.
* tests/test-dup-safer.c: Likewise.
* tests/test-dup2.c: Likewise.
* tests/test-dup3.c: Likewise.
* tests/test-fcntl.c: Likewise.
* tests/test-get-rusage-data.c: Likewise.
* tests/test-getaddrinfo.c: Likewise.
* tests/test-getlogin.h: Likewise.
* tests/test-isatty.c: Likewise.
* tests/test-localename.c: Likewise.
* tests/test-mbrtowc-w32.c: Likewise.
* tests/test-nonblocking.c: Likewise.
* tests/test-nonblocking-pipe-main.c: Likewise.
* tests/test-nonblocking-socket-main.c: Likewise.
* tests/test-nonblocking-socket.h: Likewise.
* tests/test-pipe.c: Likewise.
* tests/test-pipe2.c: Likewise.
* tests/test-poll.c: Likewise.
* tests/test-pthread_sigmask1.c: Likewise.
* tests/test-select.h: Likewise.
* tests/test-sethostname2.c: Likewise.
* tests/test-sigprocmask.c: Likewise.
* tests/test-spawn-pipe-child.c: Likewise.
* tests/test-stat-time.c: Likewise.
* tests/test-system-quote-main.c: Likewise.
* tests/test-utimens-common.h: Likewise.
* tests/test-wcrtomb-w32.c: Likewise.
* m4/csharpexec.m4 (gt_CSHARPEXEC): Likewise.
* m4/getcwd.m4 (gl_FUNC_GETCWD_NULL): Likewise.
* m4/javacomp.m4 (gt_JAVACOMP): Likewise.
* m4/javaexec.m4 (gt_JAVAEXEC): Likewise.
* m4/locale-ar.m4 (gt_LOCALE_AR): Likewise.
* m4/locale-fr.m4 (gt_LOCALE_FR, gt_LOCALE_FR_UTF8): Likewise.
* m4/locale-ja.m4 (gt_LOCALE_JA): Likewise.
* m4/locale-tr.m4 (gt_LOCALE_TR_UTF8): Likewise.
* m4/locale-zh.m4 (gt_LOCALE_ZH_CN): Likewise.
* m4/malloc.m4 (gl_CHECK_MALLOC_POSIX): Likewise.
* m4/nocrash.m4 (GL_NOCRASH): Likewise.
* m4/pathmax.m4 (gl_PATHMAX_SNIPPET): Likewise.
* m4/ptsname_r.m4 (gl_PREREQ_PTSNAME_R): Likewise.
* m4/stdio_h.m4 (gl_STDIO_H): Likewise.
* m4/tmpfile.m4 (gl_FUNC_TMPFILE): Likewise.
* m4/unistd_h.m4 (gl_UNISTD_H): Likewise.

Download

lib/nonblocking.c

/* Non-blocking I/O for pipe or socket descriptors.
   Copyright (C) 2011-2018 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include "nonblocking.h"

#include <errno.h>

#if defined _WIN32 && ! defined __CYGWIN__
/* Native Windows API.  */

# include <sys/ioctl.h>
# include <sys/socket.h>
# include <unistd.h>

/* Get declarations of the native Windows API functions.  */
# define WIN32_LEAN_AND_MEAN
# include <windows.h>

# if GNULIB_MSVC_NOTHROW
#  include "msvc-nothrow.h"
# else
#  include <io.h>
# endif

int
get_nonblocking_flag (int desc)
{
  HANDLE h = (HANDLE) _get_osfhandle (desc);
  if (h == INVALID_HANDLE_VALUE)
    {
      errno = EBADF;
      return -1;
    }
  if (GetFileType (h) == FILE_TYPE_PIPE)
    {
      /* h is a pipe or socket.  */
      DWORD state;
      if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0))
        /* h is a pipe.  */
        return (state & PIPE_NOWAIT) != 0;
      else
        /* h is a socket.  */
        errno = ENOSYS;
        return -1;
    }
  else
    /* The native Windows API does not support non-blocking on regular
       files.  */
    return 0;
}

int
set_nonblocking_flag (int desc, bool value)
{
  HANDLE h = (HANDLE) _get_osfhandle (desc);
  if (h == INVALID_HANDLE_VALUE)
    {
      errno = EBADF;
      return -1;
    }
  if (GetFileType (h) == FILE_TYPE_PIPE)
    {
      /* h is a pipe or socket.  */
      DWORD state;
      if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0))
        {
          /* h is a pipe.  */
          if ((state & PIPE_NOWAIT) != 0)
            {
              if (value)
                return 0;
              state &= ~PIPE_NOWAIT;
            }
          else
            {
              if (!value)
                return 0;
              state |= PIPE_NOWAIT;
            }
          if (SetNamedPipeHandleState (h, &state, NULL, NULL))
            return 0;
          errno = EINVAL;
          return -1;
        }
      else
        {
          /* h is a socket.  */
          int v = value;
          return ioctl (desc, FIONBIO, &v);
        }
    }
  else
    {
      /* The native Windows API does not support non-blocking on regular
         files.  */
      if (!value)
        return 0;
      errno = ENOTSUP;
      return -1;
    }
}

#else
/* Unix API.  */

# include <fcntl.h>

# if GNULIB_defined_O_NONBLOCK
#  error Please port nonblocking to your platform
# endif

/* We don't need the gnulib replacement of fcntl() here.  */
# undef fcntl

int
get_nonblocking_flag (int desc)
{
  int fcntl_flags;

  fcntl_flags = fcntl (desc, F_GETFL, 0);
  if (fcntl_flags < 0)
    return -1;
  return (fcntl_flags & O_NONBLOCK) != 0;
}

int
set_nonblocking_flag (int desc, bool value)
{
  int fcntl_flags;

  fcntl_flags = fcntl (desc, F_GETFL, 0);
  if (fcntl_flags < 0)
    return -1;
  if (((fcntl_flags & O_NONBLOCK) != 0) == value)
    return 0;
  if (value)
    fcntl_flags |= O_NONBLOCK;
  else
    fcntl_flags &= ~O_NONBLOCK;
  return fcntl (desc, F_SETFL, fcntl_flags);
}

#endif

Download

kc3-lang/gnulib/lib/nonblocking.c

Commit

lib/nonblocking.c