19b50d902SRodney W. Grimes /*- 29b50d902SRodney W. Grimes * Copyright (c) 1991, 1993, 1994 39b50d902SRodney W. Grimes * The Regents of the University of California. All rights reserved. 49b50d902SRodney W. Grimes * 59b50d902SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 69b50d902SRodney W. Grimes * modification, are permitted provided that the following conditions 79b50d902SRodney W. Grimes * are met: 89b50d902SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 99b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 109b50d902SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 119b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 129b50d902SRodney W. Grimes * documentation and/or other materials provided with the distribution. 139b50d902SRodney W. Grimes * 3. All advertising materials mentioning features or use of this software 149b50d902SRodney W. Grimes * must display the following acknowledgement: 159b50d902SRodney W. Grimes * This product includes software developed by the University of 169b50d902SRodney W. Grimes * California, Berkeley and its contributors. 179b50d902SRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 189b50d902SRodney W. Grimes * may be used to endorse or promote products derived from this software 199b50d902SRodney W. Grimes * without specific prior written permission. 209b50d902SRodney W. Grimes * 219b50d902SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 229b50d902SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 239b50d902SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 249b50d902SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 259b50d902SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 269b50d902SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 279b50d902SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 289b50d902SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 299b50d902SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 309b50d902SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 319b50d902SRodney W. Grimes * SUCH DAMAGE. 329b50d902SRodney W. Grimes */ 339b50d902SRodney W. Grimes 349b50d902SRodney W. Grimes #ifndef lint 359b50d902SRodney W. Grimes static char sccsid[] = "@(#)regular.c 8.3 (Berkeley) 4/2/94"; 369b50d902SRodney W. Grimes #endif /* not lint */ 379b50d902SRodney W. Grimes 389b50d902SRodney W. Grimes #include <sys/param.h> 399b50d902SRodney W. Grimes #include <sys/mman.h> 409b50d902SRodney W. Grimes #include <sys/stat.h> 419b50d902SRodney W. Grimes 429b50d902SRodney W. Grimes #include <err.h> 439b50d902SRodney W. Grimes #include <limits.h> 449b50d902SRodney W. Grimes #include <stdlib.h> 459b50d902SRodney W. Grimes #include <stdio.h> 469b50d902SRodney W. Grimes #include <string.h> 479b50d902SRodney W. Grimes 489b50d902SRodney W. Grimes #include "extern.h" 499b50d902SRodney W. Grimes 509b50d902SRodney W. Grimes void 519b50d902SRodney W. Grimes c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) 529b50d902SRodney W. Grimes int fd1, fd2; 539b50d902SRodney W. Grimes char *file1, *file2; 549b50d902SRodney W. Grimes off_t skip1, len1, skip2, len2; 559b50d902SRodney W. Grimes { 569b50d902SRodney W. Grimes u_char ch, *p1, *p2; 579b50d902SRodney W. Grimes off_t byte, length, line; 589b50d902SRodney W. Grimes int dfound; 599b50d902SRodney W. Grimes 609b50d902SRodney W. Grimes if (sflag && len1 != len2) 619b50d902SRodney W. Grimes exit(1); 629b50d902SRodney W. Grimes 639b50d902SRodney W. Grimes if (skip1 > len1) 649b50d902SRodney W. Grimes eofmsg(file1); 659b50d902SRodney W. Grimes len1 -= skip1; 669b50d902SRodney W. Grimes if (skip2 > len2) 679b50d902SRodney W. Grimes eofmsg(file2); 689b50d902SRodney W. Grimes len2 -= skip2; 699b50d902SRodney W. Grimes 709b50d902SRodney W. Grimes length = MIN(len1, len2); 719b50d902SRodney W. Grimes if (length > SIZE_T_MAX) 729b50d902SRodney W. Grimes return (c_special(fd1, file1, skip1, fd2, file2, skip2)); 739b50d902SRodney W. Grimes 749b50d902SRodney W. Grimes if ((p1 = (u_char *)mmap(NULL, 759b50d902SRodney W. Grimes (size_t)length, PROT_READ, 0, fd1, skip1)) == (u_char *)-1) 769b50d902SRodney W. Grimes err(ERR_EXIT, "%s", file1); 779b50d902SRodney W. Grimes if ((p2 = (u_char *)mmap(NULL, 789b50d902SRodney W. Grimes (size_t)length, PROT_READ, 0, fd2, skip2)) == (u_char *)-1) 799b50d902SRodney W. Grimes err(ERR_EXIT, "%s", file2); 809b50d902SRodney W. Grimes 819b50d902SRodney W. Grimes dfound = 0; 829b50d902SRodney W. Grimes for (byte = line = 1; length--; ++p1, ++p2, ++byte) { 839b50d902SRodney W. Grimes if ((ch = *p1) != *p2) 849b50d902SRodney W. Grimes if (lflag) { 859b50d902SRodney W. Grimes dfound = 1; 869b50d902SRodney W. Grimes (void)printf("%6qd %3o %3o\n", byte, ch, *p2); 879b50d902SRodney W. Grimes } else 889b50d902SRodney W. Grimes diffmsg(file1, file2, byte, line); 899b50d902SRodney W. Grimes /* NOTREACHED */ 909b50d902SRodney W. Grimes if (ch == '\n') 919b50d902SRodney W. Grimes ++line; 929b50d902SRodney W. Grimes } 939b50d902SRodney W. Grimes 949b50d902SRodney W. Grimes if (len1 != len2) 959b50d902SRodney W. Grimes eofmsg (len1 > len2 ? file2 : file1); 969b50d902SRodney W. Grimes if (dfound) 979b50d902SRodney W. Grimes exit(DIFF_EXIT); 989b50d902SRodney W. Grimes } 99