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99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/* Definitions for communicating with a remote tape drive.
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Copyright (C) 1988, 1992 Free Software Foundation, Inc.
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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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if !defined(_POSIX_VERSION)
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#ifdef __MSDOS__
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#include <io.h>
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#else /* !__MSDOS__ */
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extern off_t lseek ();
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#endif /* __MSDOS__ */
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#endif /* _POSIX_VERSION */
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#ifdef NO_REMOTE
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#define _isrmt(f) 0
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#define rmtopen open
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#define rmtaccess access
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#define rmtstat stat
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#define rmtcreat creat
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#define rmtlstat lstat
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#define rmtread read
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#define rmtwrite write
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#define rmtlseek lseek
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#define rmtclose close
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#define rmtioctl ioctl
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#define rmtdup dup
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#define rmtfstat fstat
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#define rmtfcntl fcntl
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#define rmtisatty isatty
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#else /* !NO_REMOTE */
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#define __REM_BIAS 128
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#define RMTIOCTL
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#ifndef O_CREAT
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#define O_CREAT 01000
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#endif
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extern char *__rmt_path;
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#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
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#include <string.h>
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#ifndef index
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#define index strchr
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#endif
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#else
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extern char *index ();
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#endif
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#define _remdev(path) (!f_force_local && (__rmt_path=index(path, ':')))
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#define _isrmt(fd) ((fd) >= __REM_BIAS)
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#define rmtopen(path,oflag,mode) (_remdev(path) ? __rmt_open(path, oflag, mode, __REM_BIAS) : open(path, oflag, mode))
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#define rmtaccess(path, amode) (_remdev(path) ? 0 : access(path, amode))
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#define rmtstat(path, buf) (_remdev(path) ? (errno = EOPNOTSUPP), -1 : stat(path, buf))
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#define rmtcreat(path, mode) (_remdev(path) ? __rmt_open (path, 1 | O_CREAT, mode, __REM_BIAS) : creat(path, mode))
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#define rmtlstat(path,buf) (_remdev(path) ? (errno = EOPNOTSUPP), -1 : lstat(path,buf))
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#define rmtread(fd, buf, n) (_isrmt(fd) ? __rmt_read(fd - __REM_BIAS, buf, n) : read(fd, buf, n))
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#define rmtwrite(fd, buf, n) (_isrmt(fd) ? __rmt_write(fd - __REM_BIAS, buf, n) : write(fd, buf, n))
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#define rmtlseek(fd, off, wh) (_isrmt(fd) ? __rmt_lseek(fd - __REM_BIAS, off, wh) : lseek(fd, off, wh))
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#define rmtclose(fd) (_isrmt(fd) ? __rmt_close(fd - __REM_BIAS) : close(fd))
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#ifdef RMTIOCTL
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#define rmtioctl(fd,req,arg) (_isrmt(fd) ? __rmt_ioctl(fd - __REM_BIAS, req, arg) : ioctl(fd, req, arg))
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#else
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#define rmtioctl(fd,req,arg) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : ioctl(fd, req, arg))
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#endif
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#define rmtdup(fd) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : dup(fd))
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#define rmtfstat(fd, buf) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : fstat(fd, buf))
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#define rmtfcntl(fd,cmd,arg) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : fcntl (fd, cmd, arg))
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#define rmtisatty(fd) (_isrmt(fd) ? 0 : isatty(fd))
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#undef RMTIOCTL
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int __rmt_open ();
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int __rmt_close ();
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int __rmt_read ();
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int __rmt_write ();
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long __rmt_lseek ();
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int __rmt_ioctl ();
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#endif /* !NO_REMOTE */
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