misc.c revision 1590 
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 * 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.
23 *
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
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char sccsid[] = "@(#)misc.c	8.2 (Berkeley) 4/1/94";
39#endif /* not lint */
40
41#include <sys/types.h>
42#include <sys/stat.h>
43
44#include <err.h>
45#include <errno.h>
46#include <fts.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50
51#include "find.h"
52
53/*
54 * brace_subst --
55 *	Replace occurrences of {} in s1 with s2 and return the result string.
56 */
57void
58brace_subst(orig, store, path, len)
59	char *orig, **store, *path;
60	int len;
61{
62	register int plen;
63	register char ch, *p;
64
65	plen = strlen(path);
66	for (p = *store; (ch = *orig) != '\0'; ++orig)
67		if (ch == '{' && orig[1] == '}') {
68			while ((p - *store) + plen > len)
69				if (!(*store = realloc(*store, len *= 2)))
70					err(1, NULL);
71			memmove(p, path, plen);
72			p += plen;
73			++orig;
74		} else
75			*p++ = ch;
76	*p = '\0';
77}
78
79/*
80 * queryuser --
81 *	print a message to standard error and then read input from standard
82 *	input. If the input is 'y' then 1 is returned.
83 */
84int
85queryuser(argv)
86	register char **argv;
87{
88	int ch, first, nl;
89
90	(void)fprintf(stderr, "\"%s", *argv);
91	while (*++argv)
92		(void)fprintf(stderr, " %s", *argv);
93	(void)fprintf(stderr, "\"? ");
94	(void)fflush(stderr);
95
96	first = ch = getchar();
97	for (nl = 0;;) {
98		if (ch == '\n') {
99			nl = 1;
100			break;
101		}
102		if (ch == EOF)
103			break;
104		ch = getchar();
105	}
106
107	if (!nl) {
108		(void)fprintf(stderr, "\n");
109		(void)fflush(stderr);
110	}
111        return (first == 'y');
112}
113
114/*
115 * emalloc --
116 *	malloc with error checking.
117 */
118void *
119emalloc(len)
120	u_int len;
121{
122	void *p;
123
124	if ((p = malloc(len)) == NULL)
125		err(1, NULL);
126	return (p);
127}
128