xbps/bin/xbps-install/question.c

115 lines
2.6 KiB
C

/*-
* Copyright (c) 2008-2010 Juan Romero Pardines.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#include "defs.h"
#ifdef __clang__
#pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
static char *
strtrim(char *str)
{
char *pch = str;
if (str == NULL || *str == '\0')
return str;
while (isspace((unsigned char)*pch))
pch++;
if (pch != str)
memmove(str, pch, (strlen(pch) + 1));
if (*str == '\0')
return str;
pch = (str + (strlen(str) - 1));
while (isspace((unsigned char)*pch))
pch--;
*++pch = '\0';
return str;
}
static bool
question(bool preset, const char *fmt, va_list ap)
{
char response[32];
vfprintf(stderr, fmt, ap);
if (preset)
fprintf(stderr, " %s ", "[YES/no]");
else
fprintf(stderr, " %s ", "[yes/NO]");
if (fgets(response, sizeof(response), stdin)) {
(void)strtrim(response);
if (strlen(response) == 0)
return preset;
if (strcasecmp(response, "yes") == 0)
return true;
else if (strcasecmp(response, "no") == 0)
return false;
}
return false;
}
bool
yesno(const char *fmt, ...)
{
va_list ap;
bool res;
va_start(ap, fmt);
res = question(1, fmt, ap);
va_end(ap);
return res;
}
bool
noyes(const char *fmt, ...)
{
va_list ap;
bool res;
va_start(ap, fmt);
res = question(0, fmt, ap);
va_end(ap);
return res;
}