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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [libgloss/] [or32/] [read.c] - Rev 844
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/* read.c. Implementation of the _read syscall for newlib Copyright (C) 2004, Jacob Bower Copyright (C) 2010, Embecosm Limited <info@embecosm.com> Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Newlib. The original work by Jacob Bower is provided as-is without any kind of warranty. Use it at your own risk! All subsequent work is bound by version 3 of the GPL as follows. 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 <http:#www.gnu.org/licenses/>. */ /* -------------------------------------------------------------------------- */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ /* -------------------------------------------------------------------------- */ #include <errno.h> #include <unistd.h> #undef errno extern int errno; /* -------------------------------------------------------------------------- */ /*!Read from a file. We don't support reading. However for stdin, it's better if we return 0 (indicating EOF) rather than fail. Remember that this function is *not* reentrant, so no static state should be held. @param[in] file The fileno to read. @param[in] ptr Buffer into which to read. @param[in] len Number of bytes to read. @return 0 to indicate EOF if the file is stdin, otherwise -1 to indicate failure, with an error code in the global variable errno. */ /* -------------------------------------------------------------------------- */ int _read (int file, char *ptr, int len) { if (STDIN_FILENO == file) { return 0; /* EOF */ } else { errno = EBADF; return -1; } } /* _read () */
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