61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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link_warning (gets,
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"the `gets' function is unreliable and should not be used.")
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/* Read a newline-terminated string from stdin into S,
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removing the trailing newline. Return S or NULL. */
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char *
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DEFUN(gets, (s), char *s)
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{
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register char *p = s;
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register int c;
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FILE *stream = stdin;
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if (!__validfp(stream) || p == NULL)
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{
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errno = EINVAL;
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return NULL;
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}
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if (feof(stream) || ferror(stream))
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return NULL;
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while ((c = getchar()) != EOF)
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if (c == '\n')
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break;
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else
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*p++ = c;
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*p = '\0';
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/* Return null if we had an error, or if we got EOF
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before writing any characters. */
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if (ferror (stream) || (feof (stream) && p == s))
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return NULL;
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return s;
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}
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