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#include <sys/types.h> 26#ifdef HAVE_UNISTD_H 27#include <unistd.h> 28#endif 29#ifdef HAVE_STDLIB_H 30#include <stdlib.h> 31#endif 32#ifdef HAVE_STRING_H 33#include <string.h> 34#endif 35 36#include "libiberty.h" 37 38/* Name of temporary file. 39 mktemp requires 6 trailing X's. */ 40#define TEMP_FILE "ccXXXXXX" 41#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) 42 43/* 44 45@deftypefn Extension char* choose_temp_base (void) 46 47Return a prefix for temporary file names or @code{NULL} if unable to 48find one. The current directory is chosen if all else fails so the 49program is exited if a temporary directory can't be found (@code{mktemp} 50fails). The buffer for the result is obtained with @code{xmalloc}. 51 52This function is provided for backwards compatibility only. Its use is 53not recommended. 54 55@end deftypefn 56 57*/ 58 59char * 60choose_temp_base (void) 61{ 62 const char *base = choose_tmpdir (); 63 char *temp_filename; 64 int len; 65 66 len = strlen (base); 67 temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1); 68 strcpy (temp_filename, base); 69 strcpy (temp_filename + len, TEMP_FILE); 70 71 if (mktemp (temp_filename) == 0) 72 abort (); 73 return temp_filename; 74} 75