137 lines
2.6 KiB
C
137 lines
2.6 KiB
C
/***************************************************************************
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gbx_stream_pipe.c
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(c) 2000-2017 Benoît Minisini <benoit.minisini@gambas-basic.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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***************************************************************************/
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#define __STREAM_IMPL_C
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#include "gb_common.h"
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#include "gb_error.h"
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#include "gbx_value.h"
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#include "gb_limit.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <errno.h>
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#include "gbx_stream.h"
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#define FD (stream->direct.fd)
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static int stream_open(STREAM *stream, const char *path, int mode)
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{
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int fd;
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int fmode;
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RESTART_SYSCALL(mkfifo(path, 0666))
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{
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if (errno != EEXIST)
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return TRUE;
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}
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fmode = 0;
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switch (mode & GB_ST_MODE)
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{
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case GB_ST_READ: fmode |= O_RDONLY; break;
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case GB_ST_WRITE: fmode |= O_WRONLY; break;
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case GB_ST_READ_WRITE: fmode |= O_RDWR; break;
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default: fmode |= O_RDWR;
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}
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RESTART_SYSCALL(fd = open(path, fmode | O_NONBLOCK))
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return TRUE;
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if ((mode & GB_ST_MODE) == GB_ST_READ)
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fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_NONBLOCK);
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stream->pipe.can_write = ((mode & GB_ST_MODE) & GB_ST_WRITE) != 0;
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stream->common.check_read = TRUE;
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FD = fd;
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return FALSE;
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}
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static int stream_close(STREAM *stream)
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{
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if (close(FD) < 0)
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return TRUE;
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FD = -1;
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return FALSE;
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}
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static int stream_read(STREAM *stream, char *buffer, int len)
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{
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return read(FD, buffer, len);
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}
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static int stream_write(STREAM *stream, char *buffer, int len)
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{
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if (!stream->pipe.can_write)
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{
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errno = EBADF;
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return -1;
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}
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return write(FD, buffer, len);
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}
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static int stream_seek(STREAM *stream, int64_t pos, int whence)
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{
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return TRUE;
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}
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static int stream_tell(STREAM *stream, int64_t *pos)
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{
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return TRUE;
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}
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static int stream_flush(STREAM *stream)
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{
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return FALSE;
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}
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#define stream_eof NULL
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#define stream_lof NULL
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static int stream_handle(STREAM *stream)
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{
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return FD;
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}
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DECLARE_STREAM(STREAM_pipe);
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