2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved.
37 * @(#)comm.c 8.4 (Berkeley) 5/4/95
38 * $FreeBSD: src/usr.bin/comm/comm.c,v 1.11.2.3 2002/07/11 00:46:37 tjr Exp $
39 * $DragonFly: src/usr.bin/comm/comm.c,v 1.3 2003/10/02 17:42:27 hmp Exp $
51 #define MAXLINELEN (LINE_MAX + 1)
53 const char *tabs[] = { "", "\t", "\t\t" };
56 void show(FILE *, const char *, char *);
57 int stricoll(char *, char *);
58 static void usage(void);
61 main(int argc, char **argv)
63 int comp, file1done = 0, file2done = 0, read1, read2;
64 int ch, flag1, flag2, flag3, iflag;
66 const char *col1, *col2, *col3;
67 char line1[MAXLINELEN], line2[MAXLINELEN];
70 flag1 = flag2 = flag3 = 1;
73 (void) setlocale(LC_ALL, "");
75 while ((ch = getopt(argc, argv, "123i")) != -1)
102 /* for each column printed, add another tab offset */
104 col1 = col2 = col3 = NULL;
112 for (read1 = read2 = 1;;) {
113 /* read next line, check for EOF */
115 file1done = !fgets(line1, MAXLINELEN, fp1);
117 file2done = !fgets(line2, MAXLINELEN, fp2);
119 /* if one file done, display the rest of the other file */
121 if (!file2done && col2)
122 show(fp2, col2, line2);
126 if (!file1done && col1)
127 show(fp1, col1, line1);
131 /* lines are the same */
133 comp = stricoll(line1, line2);
135 comp = strcoll(line1, line2);
140 (void)printf("%s%s", col3, line1);
144 /* lines are different */
149 (void)printf("%s%s", col1, line1);
154 (void)printf("%s%s", col2, line2);
161 show(FILE *fp, const char *offset, char *buf)
165 (void)printf("%s%s", offset, buf);
166 } while (fgets(buf, MAXLINELEN, fp));
174 if (!strcmp(name, "-"))
176 if ((fp = fopen(name, "r")) == NULL) {
185 (void)fprintf(stderr, "usage: comm [-123i] file1 file2\n");
190 stricoll(char *s1, char *s2)
192 char *p, line1[MAXLINELEN], line2[MAXLINELEN];
194 for (p = line1; *s1; s1++)
195 *p++ = tolower((unsigned char)*s1);
197 for (p = line2; *s2; s2++)
198 *p++ = tolower((unsigned char)*s2);
200 return strcoll(line1, line2);