Mercurial > gnulib
view lib/read.c @ 40190:ef116535bf1a
relocatable-prog: Use $ORIGIN trick on more platforms.
* m4/relocatable.m4 (gl_RELOCATABLE_BODY): Use $ORIGIN trick also on
FreeBSD >= 7.3, DragonFly >= 3.0, NetBSD >= 8.0, OpenBSD >= 5.4,
Solaris >= 10, Haiku. But don't use it on Android.
* build-aux/reloc-ldflags: Allow the use of the $ORIGIN trick also on
Hurd, FreeBSD, DragonFly, NetBSD, OpenBSD, Solaris, Haiku.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Wed, 20 Feb 2019 02:39:52 +0100 |
parents | b06060465f09 |
children |
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/* POSIX compatible read() function. Copyright (C) 2008-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2011. 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 <unistd.h> #if defined _WIN32 && ! defined __CYGWIN__ # include <errno.h> # include <io.h> # define WIN32_LEAN_AND_MEAN /* avoid including junk */ # include <windows.h> # if HAVE_MSVC_INVALID_PARAMETER_HANDLER # include "msvc-inval.h" # endif # if GNULIB_MSVC_NOTHROW # include "msvc-nothrow.h" # else # include <io.h> # endif # undef read # if HAVE_MSVC_INVALID_PARAMETER_HANDLER static ssize_t read_nothrow (int fd, void *buf, size_t count) { ssize_t result; TRY_MSVC_INVAL { result = read (fd, buf, count); } CATCH_MSVC_INVAL { result = -1; errno = EBADF; } DONE_MSVC_INVAL; return result; } # else # define read_nothrow read # endif ssize_t rpl_read (int fd, void *buf, size_t count) { ssize_t ret = read_nothrow (fd, buf, count); # if GNULIB_NONBLOCKING if (ret < 0 && GetLastError () == ERROR_NO_DATA) { HANDLE h = (HANDLE) _get_osfhandle (fd); if (GetFileType (h) == FILE_TYPE_PIPE) { /* h is a pipe or socket. */ DWORD state; if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0) && (state & PIPE_NOWAIT) != 0) /* h is a pipe in non-blocking mode. Change errno from EINVAL to EAGAIN. */ errno = EAGAIN; } } # endif return ret; } #endif