72 lines
1.1 KiB
C
72 lines
1.1 KiB
C
/*-
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* Licensed under the SPDX BSD-2-Clause identifier.
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* Use is subject to license terms, as specified in the LICENSE file.
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <strings.h>
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#include <ctype.h>
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#include "defs.h"
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#ifdef __clang__
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#pragma clang diagnostic ignored "-Wformat-nonliteral"
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#endif
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static bool
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question(bool preset, const char *fmt, va_list ap)
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{
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int response;
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bool rv = false;
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vfprintf(stderr, fmt, ap);
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if (preset)
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fputs(" [Y/n] ", stderr);
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else
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fputs(" [y/N] ", stderr);
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response = fgetc(stdin);
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if (response == '\n')
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rv = preset;
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else if (response == 'y' || response == 'Y')
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rv = true;
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else if (response == 'n' || response == 'N')
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rv = false;
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/* read the rest of the line */
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while (response != EOF && response != '\n')
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response = fgetc(stdin);
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return rv;
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}
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bool
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yesno(const char *fmt, ...)
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{
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va_list ap;
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bool res;
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va_start(ap, fmt);
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res = question(1, fmt, ap);
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va_end(ap);
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return res;
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}
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bool
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noyes(const char *fmt, ...)
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{
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va_list ap;
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bool res;
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va_start(ap, fmt);
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res = question(0, fmt, ap);
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va_end(ap);
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return res;
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}
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