1/* Utility to pick a temporary filename prefix. 2 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. 3 4This file is part of the libiberty library. 5Libiberty is free software; you can redistribute it and/or 6modify it under the terms of the GNU Library General Public 7License as published by the Free Software Foundation; either 8version 2 of the License, or (at your option) any later version. 9 10Libiberty is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13Library General Public License for more details. 14 15You should have received a copy of the GNU Library General Public 16License along with libiberty; see the file COPYING.LIB. If not, 17write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 18Boston, MA 02110-1301, USA. */ 19 20#ifdef HAVE_CONFIG_H 21#include "config.h" 22#endif 23 24#include <stdio.h> /* May get P_tmpdir. */ 25#ifdef HAVE_STDLIB_H 26#include <stdlib.h> 27#endif 28#ifdef HAVE_STRING_H 29#include <string.h> 30#endif 31 32#include "libiberty.h" 33extern char *choose_tmpdir (void); 34 35/* Name of temporary file. 36 mktemp requires 6 trailing X's. */ 37#define TEMP_FILE "ccXXXXXX" 38#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) 39 40/* 41 42@deftypefn Extension char* choose_temp_base (void) 43 44Return a prefix for temporary file names or @code{NULL} if unable to 45find one. The current directory is chosen if all else fails so the 46program is exited if a temporary directory can't be found (@code{mktemp} 47fails). The buffer for the result is obtained with @code{xmalloc}. 48 49This function is provided for backwards compatibility only. Its use is 50not recommended. 51 52@end deftypefn 53 54*/ 55 56char * 57choose_temp_base (void) 58{ 59 const char *base = choose_tmpdir (); 60 char *temp_filename; 61 int len; 62 63 len = strlen (base); 64 temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1); 65 strcpy (temp_filename, base); 66 strcpy (temp_filename + len, TEMP_FILE); 67 68 if (mktemp (temp_filename) == 0) 69 abort (); 70 return temp_filename; 71} 72