63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <hurd/fd.h>
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#include <hurd/io.h>
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#include <hurd/term.h>
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/* Initialize STREAM as necessary.
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This may change I/O functions, give a buffer, etc.
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If no buffer is allocated, but the bufsize is set,
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the bufsize will be used to allocate the buffer. */
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void
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__stdio_init_stream (FILE *stream)
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{
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struct hurd_fd *const d = stream->__cookie;
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struct stat statb;
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error_t err;
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if (stream->__buffer != NULL || stream->__userbuf)
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/* If's unbuffered by request, we can't do anything useful. */
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return;
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/* Find out what sort of file this is. */
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if (err = HURD_FD_PORT_USE (d, __io_stat (port, &statb)))
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return;
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if (S_ISCHR (statb.st_mode))
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{
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/* It's a character device.
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Make it line-buffered if it's a terminal. */
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mach_port_t cttyid;
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err = HURD_FD_PORT_USE (d, __term_getctty (port, &cttyid));
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if (! err)
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{
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__mach_port_deallocate (__mach_task_self (), cttyid);
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stream->__linebuf = 1;
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}
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}
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/* Use the block-size field to determine
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the system's optimal buffering size. */
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stream->__bufsize = statb.st_blksize;
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}
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