From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- stdio/gets.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 stdio/gets.c (limited to 'stdio/gets.c') diff --git a/stdio/gets.c b/stdio/gets.c new file mode 100644 index 0000000000..2267792fb0 --- /dev/null +++ b/stdio/gets.c @@ -0,0 +1,59 @@ +/* Copyright (C) 1991, 1994, 1995 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., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include +#include +#include +#include + +link_warning ("the `gets' function is unreliable and should not be used.") + +/* Read a newline-terminated string from stdin into S, + removing the trailing newline. Return S or NULL. */ +char * +DEFUN(gets, (s), char *s) +{ + register char *p = s; + register int c; + FILE *stream = stdin; + + if (!__validfp(stream) || p == NULL) + { + 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; +} -- cgit 1.4.1