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Dogcows Code - chaz/tar/blob - src/rmt.h
1 /* Definitions for communicating with a remote tape drive.
2 Copyright 1988, 1992, 1996, 1997, 2001 Free Software Foundation, Inc.
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)
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.
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 Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 extern char *rmt_path__
;
20 int rmt_open__
PARAMS ((const char *, int, int, const char *));
21 int rmt_close__
PARAMS ((int));
22 ssize_t rmt_read__
PARAMS ((int, char *, size_t));
23 ssize_t rmt_write__
PARAMS ((int, char *, size_t));
24 off_t rmt_lseek__
PARAMS ((int, off_t
, int));
25 int rmt_ioctl__
PARAMS ((int, int, char *));
27 /* A filename is remote if it contains a colon not preceded by a slash,
28 to take care of `/:/' which is a shorthand for `/.../<CELL-NAME>/fs'
29 on machines running OSF's Distributing Computing Environment (DCE) and
30 Distributed File System (DFS). However, when --force-local, a
31 filename is never remote. */
33 #define _remdev(Path) \
34 (!force_local_option && (rmt_path__ = strchr (Path, ':')) \
35 && rmt_path__ > (Path) && ! memchr (Path, rmt_path__ - (Path), '/'))
40 #define __REM_BIAS (1 << 30)
43 # define O_CREAT 01000
46 #define rmtopen(Path, Oflag, Mode, Command) \
47 (_remdev (Path) ? rmt_open__ (Path, Oflag, __REM_BIAS, Command) \
48 : open (Path, Oflag, Mode))
50 #define rmtaccess(Path, Amode) \
51 (_remdev (Path) ? 0 : access (Path, Amode))
53 #define rmtstat(Path, Buffer) \
54 (_remdev (Path) ? (errno = EOPNOTSUPP), -1 : stat (Path, Buffer))
56 #define rmtcreat(Path, Mode, Command) \
58 ? rmt_open__ (Path, 1 | O_CREAT, __REM_BIAS, Command) \
61 #define rmtlstat(Path, Buffer) \
62 (_remdev (Path) ? (errno = EOPNOTSUPP), -1 : lstat (Path, Buffer))
64 #define rmtread(Fd, Buffer, Length) \
65 (_isrmt (Fd) ? rmt_read__ (Fd - __REM_BIAS, Buffer, Length) \
66 : safe_read (Fd, Buffer, Length))
68 #define rmtwrite(Fd, Buffer, Length) \
69 (_isrmt (Fd) ? rmt_write__ (Fd - __REM_BIAS, Buffer, Length) \
70 : full_write (Fd, Buffer, Length))
72 #define rmtlseek(Fd, Offset, Where) \
73 (_isrmt (Fd) ? rmt_lseek__ (Fd - __REM_BIAS, Offset, Where) \
74 : lseek (Fd, Offset, Where))
76 #define rmtclose(Fd) \
77 (_isrmt (Fd) ? rmt_close__ (Fd - __REM_BIAS) : close (Fd))
79 #define rmtioctl(Fd, Request, Argument) \
80 (_isrmt (Fd) ? rmt_ioctl__ (Fd - __REM_BIAS, Request, Argument) \
81 : ioctl (Fd, Request, Argument))
84 (_isrmt (Fd) ? (errno = EOPNOTSUPP), -1 : dup (Fd))
86 #define rmtfstat(Fd, Buffer) \
87 (_isrmt (Fd) ? (errno = EOPNOTSUPP), -1 : fstat (Fd, Buffer))
89 #define rmtfcntl(Fd, Command, Argument) \
90 (_isrmt (Fd) ? (errno = EOPNOTSUPP), -1 : fcntl (Fd, Command, Argument))
92 #define rmtisatty(Fd) \
93 (_isrmt (Fd) ? 0 : isatty (Fd))
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