Annotation of embedaddon/libiconv/srclib/read.c, revision 1.1.1.2
1.1 misho 1: /* POSIX compatible read() function.
1.1.1.2 ! misho 2: Copyright (C) 2008-2019 Free Software Foundation, Inc.
1.1 misho 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
1.1.1.2 ! misho 16: along with this program. If not, see <https://www.gnu.org/licenses/>. */
1.1 misho 17:
18: #include <config.h>
19:
20: /* Specification. */
21: #include <unistd.h>
22:
1.1.1.2 ! misho 23: #if defined _WIN32 && ! defined __CYGWIN__
1.1 misho 24:
1.1.1.2 ! misho 25: # include <errno.h>
! 26: # include <io.h>
1.1 misho 27:
1.1.1.2 ! misho 28: # define WIN32_LEAN_AND_MEAN /* avoid including junk */
! 29: # include <windows.h>
! 30:
! 31: # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
! 32: # include "msvc-inval.h"
! 33: # endif
! 34: # if GNULIB_MSVC_NOTHROW
! 35: # include "msvc-nothrow.h"
! 36: # else
1.1 misho 37: # include <io.h>
1.1.1.2 ! misho 38: # endif
! 39:
! 40: # undef read
! 41:
! 42: # if HAVE_MSVC_INVALID_PARAMETER_HANDLER
! 43: static ssize_t
! 44: read_nothrow (int fd, void *buf, size_t count)
! 45: {
! 46: ssize_t result;
! 47:
! 48: TRY_MSVC_INVAL
! 49: {
! 50: result = read (fd, buf, count);
! 51: }
! 52: CATCH_MSVC_INVAL
! 53: {
! 54: result = -1;
! 55: errno = EBADF;
! 56: }
! 57: DONE_MSVC_INVAL;
1.1 misho 58:
1.1.1.2 ! misho 59: return result;
! 60: }
! 61: # else
! 62: # define read_nothrow read
! 63: # endif
1.1 misho 64:
65: ssize_t
66: rpl_read (int fd, void *buf, size_t count)
67: {
1.1.1.2 ! misho 68: ssize_t ret = read_nothrow (fd, buf, count);
1.1 misho 69:
1.1.1.2 ! misho 70: # if GNULIB_NONBLOCKING
1.1 misho 71: if (ret < 0
72: && GetLastError () == ERROR_NO_DATA)
73: {
74: HANDLE h = (HANDLE) _get_osfhandle (fd);
75: if (GetFileType (h) == FILE_TYPE_PIPE)
76: {
77: /* h is a pipe or socket. */
78: DWORD state;
79: if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0)
80: && (state & PIPE_NOWAIT) != 0)
81: /* h is a pipe in non-blocking mode.
82: Change errno from EINVAL to EAGAIN. */
83: errno = EAGAIN;
84: }
85: }
1.1.1.2 ! misho 86: # endif
! 87:
1.1 misho 88: return ret;
89: }
90:
91: #endif
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