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53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* yesno.c -- read a yes/no response from stdin
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Copyright (C) 1990, 1998 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <ctype.h>
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#if HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#include <stdio.h>
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/* Read one line from standard input
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and return nonzero if that line begins with y or Y,
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otherwise return 0. */
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int rpmatch ();
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int
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yesno ()
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{
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/* We make some assumptions here:
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a) leading white space in the response are not vital
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b) the first 128 characters of the answer are enough (the rest can
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be ignored)
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I cannot think for a situation where this is not ok. --drepper@gnu */
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char buf[128];
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int len = 0;
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int c;
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while ((c = getchar ()) != EOF && c != '\n')
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if ((len > 0 && len < 127) || (len == 0 && !isspace (c)))
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buf[len++] = c;
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buf[len] = '\0';
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return rpmatch (buf) == 1;
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}
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