c0fc4d2122
The getline function does not return a pointer but the amount of read characters. The error return value to check for is -1. Set buf to NULL to avoid dereference of an uninitialized stack value. The getline function returns -1 if size argument is NULL. Always use a valid pointer even if size is unimportant. Signed-off-by: Samanta Navarro <ferivoz@riseup.net>
88 lines
1.4 KiB
C
88 lines
1.4 KiB
C
/*
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* SPDX-FileCopyrightText: 1992 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 2007 - 2008, Nicolas François
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* SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ident "$Id$"
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "prototypes.h"
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/*
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* Synopsis
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* bool yes_or_no(bool read_only);
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*
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* Arguments
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* read_only
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* In read-only mode, all questions are answered "no". It
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* will print "No" to stdout.
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*
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* Description
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* After a yes/no question, this function gets the answer from the
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* user.
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*
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* Calls to this function will normally be preceeded by a prompt on
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* stdout, so we should fflush(3).
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*
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* Return value
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* false "no"
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* true "yes"
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*
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* See also
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* rpmatch(3)
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*/
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#if !defined(HAVE_RPMATCH)
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static int rpmatch(const char *response);
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#endif
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bool
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yes_or_no(bool read_only)
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{
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bool ret;
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char *buf;
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size_t size;
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if (read_only) {
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puts(_("No"));
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return false;
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}
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fflush(stdout);
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buf = NULL;
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ret = false;
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size = 0;
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if (getline(&buf, &size, stdin) != -1)
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ret = rpmatch(buf) == 1;
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free(buf);
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return ret;
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}
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#if !defined(HAVE_RPMATCH)
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static int
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rpmatch(const char *response)
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{
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if (response[0] == 'y' || response[0] == 'Y')
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return 1;
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if (response[0] == 'n' || response[0] == 'n')
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return 0;
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return -1;
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}
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#endif
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