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94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*-
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* Copyright (c) 2005 Brian Somers <brian@FreeBSD.org>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <err.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "extern.h"
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void
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c_link(const char *file1, off_t skip1, const char *file2, off_t skip2)
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{
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char buf1[PATH_MAX], *p1;
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char buf2[PATH_MAX], *p2;
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int dfound, len1, len2;
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off_t byte;
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u_char ch;
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if ((len1 = readlink(file1, buf1, sizeof(buf1) - 1)) < 0) {
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if (!sflag)
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err(ERR_EXIT, "%s", file1);
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else
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exit(ERR_EXIT);
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}
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if ((len2 = readlink(file2, buf2, sizeof(buf2) - 1)) < 0) {
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if (!sflag)
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err(ERR_EXIT, "%s", file2);
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else
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exit(ERR_EXIT);
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}
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if (skip1 > len1)
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skip1 = len1;
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buf1[len1] = '\0';
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if (skip2 > len2)
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skip2 = len2;
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buf2[len2] = '\0';
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dfound = 0;
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byte = 1;
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for (p1 = buf1 + skip1, p2 = buf2 + skip2; *p1 && *p2; p1++, p2++) {
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if ((ch = *p1) != *p2) {
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if (xflag) {
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dfound = 1;
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(void)printf("%08llx %02x %02x\n",
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(long long)byte - 1, ch, *p2);
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} else if (lflag) {
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dfound = 1;
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(void)printf("%6lld %3o %3o\n",
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(long long)byte, ch, *p2);
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} else
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diffmsg(file1, file2, byte, 1);
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/* NOTREACHED */
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}
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byte++;
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}
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if (*p1 || *p2)
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eofmsg (*p1 ? file2 : file1);
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if (dfound)
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exit(DIFF_EXIT);
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}
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