/* Copyright (C) 1991, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <errno.h> #include <string.h> link_warning (gets, "the `gets' function is dangerous and should not be used.") /* Read a newline-terminated string from stdin into S, removing the trailing newline. Return S or NULL. */ char * gets (s) char *s; { register char *p = s; register int c; FILE *stream = stdin; if (!__validfp (stream) || p == NULL) { __set_errno (EINVAL); return NULL; } if (feof (stream) || ferror (stream)) return NULL; while ((c = getchar ()) != EOF) if (c == '\n') break; else *p++ = c; *p = '\0'; /* Return null if we had an error, or if we got EOF before writing any characters. */ if (ferror (stream) || (feof (stream) && p == s)) return NULL; return s; }