* Copyright (c) 1990, 1993, 1994

/* $NetBSD: misc.c,v 1.16 2023/08/10 20:36:28 mrg Exp $ */

/*-
* Copyright (c) 1990, 1993, 1994
* 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.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)misc.c 8.2 (Berkeley) 4/1/94";
#else
__RCSID("$NetBSD: misc.c,v 1.16 2023/08/10 20:36:28 mrg Exp $");
#endif
#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 <unistd.h>
#include <paths.h>
#include <fcntl.h>

#include "find.h"

/*
* brace_subst --
* Replace occurrences of {} in orig with path, and place it in a malloced
* area of memory set in store.
*/
void
brace_subst(char *orig, char **store, char *path, size_t *len)
{
size_t nlen, plen, rest;
char ch, *p, *ostore;

plen = strlen(path);
for (p = *store; (ch = *orig) != '\0'; ++orig)
if (ch == '{' && orig[1] == '}') {
/* Length of string after the {}. */
rest = strlen(&orig[2]);

nlen = *len;
while ((p - *store) + plen + rest + 1 > nlen)
nlen *= 2;

if (nlen > *len) {
ptrdiff_t off = p - *store;

ostore = *store;
if ((*store = realloc(ostore, nlen)) == NULL)
err(1, "realloc");
*len = nlen;
p = *store + off; /* Relocate. */
}
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(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');
}

/*
* show_path --
* called on SIGINFO
*/
/* ARGSUSED */
void
show_path(int sig)
{
extern FTSENT *g_entry;
static int ttyfd = -2;
char buf[2048];
int oerrno, n;

if (g_entry == NULL) {
/*
* not initialized yet.
* assumption: pointer assignment is atomic.
*/
return;
}

oerrno = errno;
if (ttyfd == -2)
ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC);

if (ttyfd == -1)
goto out;

n = snprintf_ss(buf, sizeof(buf), "%s: path %s\n", getprogname(),
g_entry->fts_path);

if (n <= 0)
goto out;

write(ttyfd, buf, (size_t)n);
out:
errno = oerrno;
}