1 /* Definitions for communicating with a remote tape drive. 2 Copyright (C) 1988, 1992 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software 16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ 17 18 #ifdef HAVE_UNISTD_H 19 #include <unistd.h> 20 #endif 21 22 #if !defined(_POSIX_VERSION) 23 #ifdef __MSDOS__ 24 #include <io.h> 25 #else /* !__MSDOS__ */ 26 extern off_t lseek (); 27 #endif /* __MSDOS__ */ 28 #endif /* _POSIX_VERSION */ 29 30 #ifdef NO_REMOTE 31 #define _isrmt(f) 0 32 #define rmtopen open 33 #define rmtaccess access 34 #define rmtstat stat 35 #define rmtcreat creat 36 #define rmtlstat lstat 37 #define rmtread read 38 #define rmtwrite write 39 #define rmtlseek lseek 40 #define rmtclose close 41 #define rmtioctl ioctl 42 #define rmtdup dup 43 #define rmtfstat fstat 44 #define rmtfcntl fcntl 45 #define rmtisatty isatty 46 47 #else /* !NO_REMOTE */ 48 49 #define __REM_BIAS 128 50 #define RMTIOCTL 51 52 #ifndef O_CREAT 53 #define O_CREAT 01000 54 #endif 55 56 extern char *__rmt_path; 57 58 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H) 59 #include <string.h> 60 #ifndef index 61 #define index strchr 62 #endif 63 #else 64 extern char *index (); 65 #endif 66 67 #define _remdev(path) (!f_force_local && (__rmt_path=index(path, ':'))) 68 #define _isrmt(fd) ((fd) >= __REM_BIAS) 69 70 #define rmtopen(path,oflag,mode) (_remdev(path) ? __rmt_open(path, oflag, mode, __REM_BIAS) : open(path, oflag, mode)) 71 #define rmtaccess(path, amode) (_remdev(path) ? 0 : access(path, amode)) 72 #define rmtstat(path, buf) (_remdev(path) ? (errno = EOPNOTSUPP), -1 : stat(path, buf)) 73 #define rmtcreat(path, mode) (_remdev(path) ? __rmt_open (path, 1 | O_CREAT, mode, __REM_BIAS) : creat(path, mode)) 74 #define rmtlstat(path,buf) (_remdev(path) ? (errno = EOPNOTSUPP), -1 : lstat(path,buf)) 75 76 #define rmtread(fd, buf, n) (_isrmt(fd) ? __rmt_read(fd - __REM_BIAS, buf, n) : read(fd, buf, n)) 77 #define rmtwrite(fd, buf, n) (_isrmt(fd) ? __rmt_write(fd - __REM_BIAS, buf, n) : write(fd, buf, n)) 78 #define rmtlseek(fd, off, wh) (_isrmt(fd) ? __rmt_lseek(fd - __REM_BIAS, off, wh) : lseek(fd, off, wh)) 79 #define rmtclose(fd) (_isrmt(fd) ? __rmt_close(fd - __REM_BIAS) : close(fd)) 80 #ifdef RMTIOCTL 81 #define rmtioctl(fd,req,arg) (_isrmt(fd) ? __rmt_ioctl(fd - __REM_BIAS, req, arg) : ioctl(fd, req, arg)) 82 #else 83 #define rmtioctl(fd,req,arg) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : ioctl(fd, req, arg)) 84 #endif 85 #define rmtdup(fd) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : dup(fd)) 86 #define rmtfstat(fd, buf) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : fstat(fd, buf)) 87 #define rmtfcntl(fd,cmd,arg) (_isrmt(fd) ? (errno = EOPNOTSUPP), -1 : fcntl (fd, cmd, arg)) 88 #define rmtisatty(fd) (_isrmt(fd) ? 0 : isatty(fd)) 89 90 #undef RMTIOCTL 91 92 int __rmt_open (); 93 int __rmt_close (); 94 int __rmt_read (); 95 int __rmt_write (); 96 long __rmt_lseek (); 97 int __rmt_ioctl (); 98 #endif /* !NO_REMOTE */ 99