misc.c revision 287266 
1/*-
2 * Copyright (c) 1990, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Cimarron D. Taylor of the University of California, Berkeley.
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.
16 * 4. 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.
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#ifndef lint
34#if 0
35static char sccsid[] = "@(#)misc.c	8.2 (Berkeley) 4/1/94";
36#else
37#endif
38#endif /* not lint */
39
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: stable/10/usr.bin/find/misc.c 287266 2015-08-28 20:53:08Z jilles $");
42
43#include <sys/types.h>
44#include <sys/stat.h>
45
46#include <err.h>
47#include <errno.h>
48#include <fts.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52
53#include "find.h"
54
55/*
56 * brace_subst --
57 *	Replace occurrences of {} in s1 with s2 and return the result string.
58 */
59void
60brace_subst(char *orig, char **store, char *path, size_t len)
61{
62	const char *pastorigend, *p, *q;
63	char *dst;
64	size_t newlen, plen;
65
66	plen = strlen(path);
67	newlen = strlen(orig) + 1;
68	pastorigend = orig + newlen;
69	for (p = orig; (q = strstr(p, "{}")) != NULL; p = q + 2) {
70		if (plen > 2 && newlen + plen - 2 < newlen)
71			errx(2, "brace_subst overflow");
72		newlen += plen - 2;
73	}
74	if (newlen > len) {
75		*store = reallocf(*store, newlen);
76		if (*store == NULL)
77			err(2, NULL);
78	}
79	dst = *store;
80	for (p = orig; (q = strstr(p, "{}")) != NULL; p = q + 2) {
81		memcpy(dst, p, q - p);
82		dst += q - p;
83		memcpy(dst, path, plen);
84		dst += plen;
85	}
86	memcpy(dst, p, pastorigend - p);
87}
88
89/*
90 * queryuser --
91 *	print a message to standard error and then read input from standard
92 *	input. If the input is an affirmative response (according to the
93 *	current locale) then 1 is returned.
94 */
95int
96queryuser(char *argv[])
97{
98	char *p, resp[256];
99
100	(void)fprintf(stderr, "\"%s", *argv);
101	while (*++argv)
102		(void)fprintf(stderr, " %s", *argv);
103	(void)fprintf(stderr, "\"? ");
104	(void)fflush(stderr);
105
106	if (fgets(resp, sizeof(resp), stdin) == NULL)
107		*resp = '\0';
108	if ((p = strchr(resp, '\n')) != NULL)
109		*p = '\0';
110	else {
111		(void)fprintf(stderr, "\n");
112		(void)fflush(stderr);
113	}
114        return (rpmatch(resp) == 1);
115}
116