/* Open a stdio stream on an anonymous temporary file. Generic/POSIX version. Copyright (C) 1991,93,1996-2000,2002,2003 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 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 Lesser General Public License for more details. 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 <unistd.h> #ifdef USE_IN_LIBIO # include <iolibio.h> # define __fdopen INTUSE(_IO_fdopen) # ifndef tmpfile # define tmpfile __new_tmpfile # endif #endif #ifndef GEN_THIS # define GEN_THIS __GT_FILE #endif /* This returns a new stream opened on a temporary file (generated by tmpnam). The file is opened with mode "w+b" (binary read/write). If we couldn't generate a unique filename or the file couldn't be opened, NULL is returned. */ FILE * tmpfile (void) { char buf[FILENAME_MAX]; int fd; FILE *f; if (__path_search (buf, FILENAME_MAX, NULL, "tmpf", 0)) return NULL; fd = __gen_tempname (buf, GEN_THIS); if (fd < 0) return NULL; /* Note that this relies on the Unix semantics that a file is not really removed until it is closed. */ (void) __unlink (buf); if ((f = __fdopen (fd, "w+b")) == NULL) __close (fd); return f; } #if defined USE_IN_LIBIO && GEN_THIS == __GT_FILE /* Not for tmpfile64. */ # undef tmpfile # include <shlib-compat.h> versioned_symbol (libc, __new_tmpfile, tmpfile, GLIBC_2_1); #endif