2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1995 Wolfram Schneider <wosch@FreeBSD.org>. Berlin.
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 static char copyright[] =
45 "@(#) Copyright (c) 1989, 1993\n\
46 The Regents of the University of California. All rights reserved.\n";
50 static char sccsid[] = "@(#)locate.bigram.c 8.1 (Berkeley) 6/6/93";
55 * bigram < sorted_file_names | sort -nr |
56 * awk 'NR <= 128 { printf $2 }' > bigrams
58 * List bigrams for 'updatedb' script.
59 * Use 'code' to encode a file using this output.
62 #include <capsicum_helpers.h>
66 #include <sys/param.h> /* for MAXPATHLEN */
69 u_char buf1[MAXPATHLEN] = " ";
70 u_char buf2[MAXPATHLEN];
71 u_int bigram[UCHAR_MAX + 1][UCHAR_MAX + 1];
77 u_char *oldpath = buf1, *path = buf2;
80 if (caph_limit_stdio() < 0 || caph_enter() < 0)
83 while (fgets(path, sizeof(buf2), stdin) != NULL) {
86 * We don't need remove newline character '\n'.
87 * '\n' is less than ASCII_MIN and will be later
92 /* skip longest common prefix */
93 for (cp = path; *cp == *oldpath; cp++, oldpath++)
97 while (*cp != '\0' && *(cp + 1) != '\0') {
98 bigram[(u_char)*cp][(u_char)*(cp + 1)]++;
112 /* output, boundary check */
113 for (i = ASCII_MIN; i <= ASCII_MAX; i++)
114 for (j = ASCII_MIN; j <= ASCII_MAX; j++)
115 if (bigram[i][j] != 0)
116 (void)printf("%4u %c%c\n", bigram[i][j], i, j);