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/* $OpenBSD: special.c,v 1.8 2018/03/05 16:53:39 cheloha Exp $ */
/* $NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $ */
/*-
* Copyright (c) 1991, 1993, 1994
* 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.
*/
#include <sys/types.h>
#include <err.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "extern.h"
void
c_special(int fd1, char *file1, off_t skip1, int fd2, char *file2, off_t skip2)
{
int ch1, ch2;
off_t byte, line;
FILE *fp1, *fp2;
int dfound;
if ((fp1 = fdopen(fd1, "r")) == NULL)
fatal("%s", file1);
if ((fp2 = fdopen(fd2, "r")) == NULL)
fatal("%s", file2);
dfound = 0;
while (skip1--)
if (getc(fp1) == EOF)
goto eof;
while (skip2--)
if (getc(fp2) == EOF)
goto eof;
for (byte = line = 1;; ++byte) {
ch1 = getc(fp1);
ch2 = getc(fp2);
if (ch1 == EOF || ch2 == EOF)
break;
if (ch1 != ch2) {
if (lflag) {
dfound = 1;
(void)printf("%6lld %3o %3o\n", (long long)byte,
ch1, ch2);
} else
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
}
if (ch1 == '\n')
++line;
}
eof: if (ferror(fp1))
fatal("%s", file1);
if (ferror(fp2))
fatal("%s", file2);
if (feof(fp1)) {
if (!feof(fp2))
eofmsg(file1);
} else
if (feof(fp2))
eofmsg(file2);
if (dfound)
exit(DIFF_EXIT);
}
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