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+/* $OpenBSD: extern.h,v 1.12 2015/11/19 17:50:04 tedu Exp $ */
+/* $NetBSD: extern.h,v 1.3 1994/11/23 07:42:00 jtc Exp $ */
+
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)extern.h 8.1 (Berkeley) 6/6/93
+ */
+
+#define WR(p, size) \
+ if (write(STDOUT_FILENO, p, size) != size) \
+ oerr();
+
+struct tailfile {
+ char *fname;
+ FILE *fp;
+ struct stat sb;
+#ifdef __linux__
+ int fwd; /* inotify file watch descriptor */
+ int dwd; /* inotify dir watch descriptor */
+ long pos; /* used to keep track of truncations */
+#endif
+};
+
+enum STYLE { NOTSET = 0, FBYTES, FLINES, RBYTES, RLINES, REVERSE };
+
+void forward(struct tailfile *, int, enum STYLE, off_t);
+void reverse(struct tailfile *, int, enum STYLE, off_t);
+
+int bytes(struct tailfile *, off_t);
+int lines(struct tailfile *, off_t);
+
+void ierr(const char *);
+void oerr(void);
+void printfname(const char *);
+
+extern int fflag, rflag, rval;
+extern int is_stdin;