diff options
Diffstat (limited to 'libc/stdio/tmpnam.c')
| -rw-r--r-- | libc/stdio/tmpnam.c | 55 |
1 files changed, 30 insertions, 25 deletions
diff --git a/libc/stdio/tmpnam.c b/libc/stdio/tmpnam.c index 38475a8ec..bc4ffeb6a 100644 --- a/libc/stdio/tmpnam.c +++ b/libc/stdio/tmpnam.c @@ -1,20 +1,20 @@ -/* Copyright (C) 1991, 1993, 1996, 1997, 1998 Free Software Foundation, Inc. +/* Copyright (C) 1991,1993,1996-1999,2000 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. + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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. + Lesser 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. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ #include <stdio.h> #include <string.h> @@ -25,26 +25,31 @@ libc_hidden_proto(memcpy) static char tmpnam_buffer[L_tmpnam]; /* Generate a unique filename in P_tmpdir. - This function is *not* thread safe when S == NULL! -*/ -char * tmpnam (char *s) + + This function is *not* thread safe! */ +char * +tmpnam (char *s) { - /* By using two buffers we manage to be thread safe in the case - where S != NULL. */ - char tmpbuf[L_tmpnam]; + /* By using two buffers we manage to be thread safe in the case + where S != NULL. */ + char tmpbufmem[L_tmpnam]; + char *tmpbuf = s ?: tmpbufmem; - /* In the following call we use the buffer pointed to by S if - non-NULL although we don't know the size. But we limit the size - to L_tmpnam characters in any case. */ - if (__path_search (s ? : tmpbuf, L_tmpnam, NULL, NULL, 0)) - return NULL; + /* In the following call we use the buffer pointed to by S if + non-NULL although we don't know the size. But we limit the size + to L_tmpnam characters in any case. */ + if (__builtin_expect (__path_search (tmpbuf, L_tmpnam, NULL, NULL, 0), + 0)) + return NULL; - if (__gen_tempname (s ? : tmpbuf, __GT_NOCREATE)) - return NULL; + if (__builtin_expect (__gen_tempname (tmpbuf, __GT_NOCREATE), 0)) + return NULL; - if (s == NULL) - return (char *) memcpy (tmpnam_buffer, tmpbuf, L_tmpnam); + if (s == NULL) + return (char *) memcpy (tmpnam_buffer, tmpbuf, L_tmpnam); - return s; + return s; } +link_warning (tmpnam, + "the use of `tmpnam' is dangerous, better use `mkstemp'") |