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Annotation of src/usr.bin/cmp/special.c, Revision 1.7

1.7     ! okan        1: /*      $OpenBSD: special.c,v 1.6 2009/10/27 23:59:36 deraadt 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
1.7     ! okan       43: c_special(int fd1, char *file1, off_t skip1, int fd2, char *file2, off_t skip2)
1.1       deraadt    44: {
                     45:        int ch1, ch2;
                     46:        off_t byte, line;
                     47:        FILE *fp1, *fp2;
                     48:        int dfound;
                     49:
                     50:        if ((fp1 = fdopen(fd1, "r")) == NULL)
                     51:                err(ERR_EXIT, "%s", file1);
                     52:        if ((fp2 = fdopen(fd2, "r")) == NULL)
                     53:                err(ERR_EXIT, "%s", file2);
                     54:
1.3       mickey     55:        dfound = 0;
1.1       deraadt    56:        while (skip1--)
                     57:                if (getc(fp1) == EOF)
                     58:                        goto eof;
                     59:        while (skip2--)
                     60:                if (getc(fp2) == EOF)
                     61:                        goto eof;
                     62:
                     63:        for (byte = line = 1;; ++byte) {
                     64:                ch1 = getc(fp1);
                     65:                ch2 = getc(fp2);
                     66:                if (ch1 == EOF || ch2 == EOF)
                     67:                        break;
1.3       mickey     68:                if (ch1 != ch2) {
1.1       deraadt    69:                        if (lflag) {
                     70:                                dfound = 1;
1.4       deraadt    71:                                (void)printf("%6lld %3o %3o\n", (long long)byte,
                     72:                                    ch1, ch2);
1.1       deraadt    73:                        } else
                     74:                                diffmsg(file1, file2, byte, line);
                     75:                                /* NOTREACHED */
1.3       mickey     76:                }
1.1       deraadt    77:                if (ch1 == '\n')
                     78:                        ++line;
                     79:        }
                     80:
                     81: eof:   if (ferror(fp1))
                     82:                err(ERR_EXIT, "%s", file1);
                     83:        if (ferror(fp2))
                     84:                err(ERR_EXIT, "%s", file2);
                     85:        if (feof(fp1)) {
                     86:                if (!feof(fp2))
                     87:                        eofmsg(file1);
                     88:        } else
                     89:                if (feof(fp2))
                     90:                        eofmsg(file2);
                     91:        if (dfound)
                     92:                exit(DIFF_EXIT);
                     93: }