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. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
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
32 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved.
33 * @(#)comm.c 8.4 (Berkeley) 5/4/95
34 * $FreeBSD: head/usr.bin/comm/comm.c 227235 2011-11-06 18:49:10Z ed $
50 static const char *tabs[] = { "", "\t", "\t\t" };
52 static FILE *file(const char *);
53 static wchar_t *convert(const char *);
54 static void show(FILE *, const char *, const char *, char **, size_t *);
55 static void usage(void);
58 main(int argc, char *argv[])
60 int comp, read1, read2;
61 int ch, flag1, flag2, flag3;
63 const char *col1, *col2, *col3;
64 size_t line1len, line2len;
67 wchar_t *tline1, *tline2;
70 (void) setlocale(LC_ALL, "");
72 flag1 = flag2 = flag3 = 1;
74 while ((ch = getopt(argc, argv, "123i")) != -1)
101 /* for each column printed, add another tab offset */
103 col1 = col2 = col3 = NULL;
111 line1len = line2len = 0;
112 line1 = line2 = NULL;
115 for (read1 = read2 = 1;;) {
116 /* read next line, check for EOF */
118 n1 = getline(&line1, &line1len, fp1);
119 if (n1 < 0 && ferror(fp1))
120 err(1, "%s", argv[0]);
121 if (n1 > 0 && line1[n1 - 1] == '\n')
122 line1[n1 - 1] = '\0';
126 n2 = getline(&line2, &line2len, fp2);
127 if (n2 < 0 && ferror(fp2))
128 err(1, "%s", argv[1]);
129 if (n2 > 0 && line2[n2 - 1] == '\n')
130 line2[n2 - 1] = '\0';
133 /* if one file done, display the rest of the other file */
135 if (n2 >= 0 && col2 != NULL)
136 show(fp2, argv[1], col2, &line2, &line2len);
140 if (n1 >= 0 && col1 != NULL)
141 show(fp1, argv[0], col1, &line1, &line1len);
146 if ((tline1 = convert(line1)) != NULL)
147 tline2 = convert(line2);
148 if (tline1 == NULL || tline2 == NULL)
149 comp = strcmp(line1, line2);
151 comp = wcscoll(tline1, tline2);
157 /* lines are the same */
161 (void)printf("%s%s\n", col3, line1);
165 /* lines are different */
170 (void)printf("%s%s\n", col1, line1);
175 (void)printf("%s%s\n", col2, line2);
182 convert(const char *str)
187 if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
189 if (SIZE_MAX / sizeof(*buf) < n + 1)
190 errx(1, "conversion buffer length overflow");
191 if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
193 if (mbstowcs(buf, str, n + 1) != n)
194 errx(1, "internal mbstowcs() error");
197 for (p = buf; *p != L'\0'; p++)
205 show(FILE *fp, const char *fn, const char *offset, char **bufp, size_t *buflenp)
210 (void)printf("%s%s\n", offset, *bufp);
211 if ((n = getline(bufp, buflenp, fp)) < 0)
213 if (n > 0 && (*bufp)[n - 1] == '\n')
214 (*bufp)[n - 1] = '\0';
221 file(const char *name)
225 if (!strcmp(name, "-"))
227 if ((fp = fopen(name, "r")) == NULL) {
236 (void)fprintf(stderr, "usage: comm [-123i] file1 file2\n");