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