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Annotation of embedaddon/libiconv/srclib/read.c, revision 1.1

1.1     ! misho       1: /* POSIX compatible read() function.
        !             2:    Copyright (C) 2008-2011 Free Software Foundation, Inc.
        !             3:    Written by Bruno Haible <bruno@clisp.org>, 2011.
        !             4: 
        !             5:    This program is free software: you can redistribute it and/or modify
        !             6:    it under the terms of the GNU General Public License as published by
        !             7:    the Free Software Foundation; either version 3 of the License, or
        !             8:    (at your option) any later version.
        !             9: 
        !            10:    This program is distributed in the hope that it will be useful,
        !            11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            13:    GNU General Public License for more details.
        !            14: 
        !            15:    You should have received a copy of the GNU General Public License
        !            16:    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
        !            17: 
        !            18: #include <config.h>
        !            19: 
        !            20: /* Specification.  */
        !            21: #include <unistd.h>
        !            22: 
        !            23: /* Replace this function only if module 'nonblocking' is requested.  */
        !            24: #if GNULIB_NONBLOCKING
        !            25: 
        !            26: # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
        !            27: 
        !            28: #  include <errno.h>
        !            29: #  include <io.h>
        !            30: 
        !            31: #  define WIN32_LEAN_AND_MEAN  /* avoid including junk */
        !            32: #  include <windows.h>
        !            33: 
        !            34: ssize_t
        !            35: rpl_read (int fd, void *buf, size_t count)
        !            36: #undef read
        !            37: {
        !            38:   ssize_t ret = read (fd, buf, count);
        !            39: 
        !            40:   if (ret < 0
        !            41:       && GetLastError () == ERROR_NO_DATA)
        !            42:     {
        !            43:       HANDLE h = (HANDLE) _get_osfhandle (fd);
        !            44:       if (GetFileType (h) == FILE_TYPE_PIPE)
        !            45:         {
        !            46:           /* h is a pipe or socket.  */
        !            47:           DWORD state;
        !            48:           if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0)
        !            49:               && (state & PIPE_NOWAIT) != 0)
        !            50:             /* h is a pipe in non-blocking mode.
        !            51:                Change errno from EINVAL to EAGAIN.  */
        !            52:             errno = EAGAIN;
        !            53:         }
        !            54:     }
        !            55:   return ret;
        !            56: }
        !            57: 
        !            58: # endif
        !            59: #endif