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77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)extern.h 8.1 (Berkeley) 6/6/93
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*
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* $FreeBSD$
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*/
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#define WR(p, size) do { \
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if (write(STDOUT_FILENO, p, size) != (ssize_t)size) \
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oerr(); \
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} while(0)
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#define TAILMAPLEN (4<<20)
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struct mapinfo {
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off_t mapoff;
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off_t maxoff;
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size_t maplen;
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char *start;
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int fd;
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};
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struct file_info {
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FILE *fp;
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char *file_name;
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struct stat st;
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};
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typedef struct file_info file_info_t;
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enum STYLE { NOTSET = 0, FBYTES, FLINES, RBYTES, RLINES, REVERSE };
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void follow(file_info_t *, enum STYLE, off_t);
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void forward(FILE *, enum STYLE, off_t, struct stat *);
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void reverse(FILE *, enum STYLE, off_t, struct stat *);
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int bytes(FILE *, off_t);
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int lines(FILE *, off_t);
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void ierr(void);
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void oerr(void);
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int mapprint(struct mapinfo *, off_t, off_t);
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int maparound(struct mapinfo *, off_t);
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extern int Fflag, fflag, qflag, rflag, rval, no_files;
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extern const char *fname;
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