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Annotation of src/usr.bin/cmp/special.c, Revision 1.6

1.6     ! deraadt     1: /*      $OpenBSD: special.c,v 1.5 2003/06/03 02:56:06 millert Exp $      */
1.1       deraadt     2: /*      $NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $      */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991, 1993, 1994
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
1.5       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
                     33: #include <sys/types.h>
                     34:
                     35: #include <err.h>
                     36: #include <stdlib.h>
                     37: #include <stdio.h>
                     38: #include <string.h>
                     39:
                     40: #include "extern.h"
                     41:
                     42: void
                     43: c_special(fd1, file1, skip1, fd2, file2, skip2)
                     44:        int fd1, fd2;
                     45:        char *file1, *file2;
                     46:        off_t skip1, skip2;
                     47: {
                     48:        int ch1, ch2;
                     49:        off_t byte, line;
                     50:        FILE *fp1, *fp2;
                     51:        int dfound;
                     52:
                     53:        if ((fp1 = fdopen(fd1, "r")) == NULL)
                     54:                err(ERR_EXIT, "%s", file1);
                     55:        if ((fp2 = fdopen(fd2, "r")) == NULL)
                     56:                err(ERR_EXIT, "%s", file2);
                     57:
1.3       mickey     58:        dfound = 0;
1.1       deraadt    59:        while (skip1--)
                     60:                if (getc(fp1) == EOF)
                     61:                        goto eof;
                     62:        while (skip2--)
                     63:                if (getc(fp2) == EOF)
                     64:                        goto eof;
                     65:
                     66:        for (byte = line = 1;; ++byte) {
                     67:                ch1 = getc(fp1);
                     68:                ch2 = getc(fp2);
                     69:                if (ch1 == EOF || ch2 == EOF)
                     70:                        break;
1.3       mickey     71:                if (ch1 != ch2) {
1.1       deraadt    72:                        if (lflag) {
                     73:                                dfound = 1;
1.4       deraadt    74:                                (void)printf("%6lld %3o %3o\n", (long long)byte,
                     75:                                    ch1, ch2);
1.1       deraadt    76:                        } else
                     77:                                diffmsg(file1, file2, byte, line);
                     78:                                /* NOTREACHED */
1.3       mickey     79:                }
1.1       deraadt    80:                if (ch1 == '\n')
                     81:                        ++line;
                     82:        }
                     83:
                     84: eof:   if (ferror(fp1))
                     85:                err(ERR_EXIT, "%s", file1);
                     86:        if (ferror(fp2))
                     87:                err(ERR_EXIT, "%s", file2);
                     88:        if (feof(fp1)) {
                     89:                if (!feof(fp2))
                     90:                        eofmsg(file1);
                     91:        } else
                     92:                if (feof(fp2))
                     93:                        eofmsg(file2);
                     94:        if (dfound)
                     95:                exit(DIFF_EXIT);
                     96: }