tar-1.29HEADtar-1.29master

1 files changed, 99 insertions, 0 deletions

diff --git a/lib/rmt.h b/lib/rmt.h
new file mode 100644
index 0000000..ff10e7c
--- /dev/null
+++ b/lib/rmt.h
@@ -0,0 +1,99 @@
+/* Definitions for communicating with a remote tape drive.
+
+   Copyright (C) 1988, 1992, 1996, 1997, 2001, 2003, 2004, 2007 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+extern char const *rmt_command;
+extern char const *rmt_dev_name__;
+
+int rmt_open__ (const char *, int, int, const char *);
+int rmt_close__ (int);
+size_t rmt_read__ (int, char *, size_t);
+size_t rmt_write__ (int, char *, size_t);
+off_t rmt_lseek__ (int, off_t, int);
+int rmt_ioctl__ (int, int, char *);
+
+extern bool force_local_option;
+
+/* A filename is remote if it contains a colon not preceded by a slash,
+   to take care of `/:/' which is a shorthand for `/.../<CELL-NAME>/fs'
+   on machines running OSF's Distributing Computing Environment (DCE) and
+   Distributed File System (DFS).  However, when --force-local, a
+   filename is never remote.  */
+
+#define _remdev(dev_name) \
+  (!force_local_option && (rmt_dev_name__ = strchr (dev_name, ':')) \
+   && rmt_dev_name__ > (dev_name) \
+   && ! memchr (dev_name, '/', rmt_dev_name__ - (dev_name)))
+
+#define _isrmt(fd) \
+  ((fd) >= __REM_BIAS)
+
+#define __REM_BIAS (1 << 30)
+
+#ifndef O_CREAT
+# define O_CREAT 01000
+#endif
+
+#define rmtopen(dev_name, oflag, mode, command) \
+  (_remdev (dev_name) ? rmt_open__ (dev_name, oflag, __REM_BIAS, command) \
+   : open (dev_name, oflag, mode))
+
+#define rmtaccess(dev_name, amode) \
+  (_remdev (dev_name) ? 0 : access (dev_name, amode))
+
+#define rmtstat(dev_name, buffer) \
+  (_remdev (dev_name) ? (errno = EOPNOTSUPP), -1 : stat (dev_name, buffer))
+
+#define rmtcreat(dev_name, mode, command) \
+   (_remdev (dev_name) \
+    ? rmt_open__ (dev_name, O_CREAT | O_WRONLY, __REM_BIAS, command) \
+    : creat (dev_name, mode))
+
+#define rmtlstat(dev_name, muffer) \
+  (_remdev (dev_name) ? (errno = EOPNOTSUPP), -1 : lstat (dev_name, buffer))
+
+#define rmtread(fd, buffer, length) \
+  (_isrmt (fd) ? rmt_read__ (fd - __REM_BIAS, buffer, length) \
+   : safe_read (fd, buffer, length))
+
+#define rmtwrite(fd, buffer, length) \
+  (_isrmt (fd) ? rmt_write__ (fd - __REM_BIAS, buffer, length) \
+   : full_write (fd, buffer, length))
+
+#define rmtlseek(fd, offset, where) \
+  (_isrmt (fd) ? rmt_lseek__ (fd - __REM_BIAS, offset, where) \
+   : lseek (fd, offset, where))
+
+#define rmtclose(fd) \
+  (_isrmt (fd) ? rmt_close__ (fd - __REM_BIAS) : close (fd))
+
+#define rmtioctl(fd, request, argument) \
+  (_isrmt (fd) ? rmt_ioctl__ (fd - __REM_BIAS, request, argument) \
+   : ioctl (fd, request, argument))
+
+#define rmtdup(fd) \
+  (_isrmt (fd) ? (errno = EOPNOTSUPP), -1 : dup (fd))
+
+#define rmtfstat(fd, buffer) \
+  (_isrmt (fd) ? (errno = EOPNOTSUPP), -1 : fstat (fd, buffer))
+
+#define rmtfcntl(cd, command, argument) \
+  (_isrmt (fd) ? (errno = EOPNOTSUPP), -1 : fcntl (fd, command, argument))
+
+#define rmtisatty(fd) \
+  (_isrmt (fd) ? 0 : isatty (fd))