xref: /csrg-svn/usr.bin/find/misc.c (revision 61995)

/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Cimarron D. Taylor of the University of California, Berkeley.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)misc.c	8.1 (Berkeley) 06/06/93";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <fts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "find.h"

/*
 * brace_subst --
 *	Replace occurrences of {} in s1 with s2 and return the result string.
 */
void
brace_subst(orig, store, path, len)
	char *orig, **store, *path;
	int len;
{
	register int plen;
	register char ch, *p;

	plen = strlen(path);
	for (p = *store; ch = *orig; ++orig)
		if (ch == '{' && orig[1] == '}') {
			while ((p - *store) + plen > len)
				if (!(*store = realloc(*store, len *= 2)))
					err(1, NULL);
			memmove(p, path, plen);
			p += plen;
			++orig;
		} else
			*p++ = ch;
	*p = '\0';
}

/*
 * queryuser --
 *	print a message to standard error and then read input from standard
 *	input. If the input is 'y' then 1 is returned.
 */
int
queryuser(argv)
	register char **argv;
{
	int ch, first, nl;

	(void)fprintf(stderr, "\"%s", *argv);
	while (*++argv)
		(void)fprintf(stderr, " %s", *argv);
	(void)fprintf(stderr, "\"? ");
	(void)fflush(stderr);

	first = ch = getchar();
	for (nl = 0;;) {
		if (ch == '\n') {
			nl = 1;
			break;
		}
		if (ch == EOF)
			break;
		ch = getchar();
	}

	if (!nl) {
		(void)fprintf(stderr, "\n");
		(void)fflush(stderr);
	}
        return (first == 'y');
}

/*
 * emalloc --
 *	malloc with error checking.
 */
void *
emalloc(len)
	u_int len;
{
	void *p;

	if (p = malloc(len))
		return (p);
	err(1, NULL);
}