choose-temp.c revision 258817
1239310Sdim/* Utility to pick a temporary filename prefix. 2239310Sdim Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. 3239310Sdim 4239310SdimThis file is part of the libiberty library. 5239310SdimLibiberty is free software; you can redistribute it and/or 6239310Sdimmodify it under the terms of the GNU Library General Public 7239310SdimLicense as published by the Free Software Foundation; either 8239310Sdimversion 2 of the License, or (at your option) any later version. 9239310Sdim 10239310SdimLibiberty is distributed in the hope that it will be useful, 11239310Sdimbut WITHOUT ANY WARRANTY; without even the implied warranty of 12239310SdimMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13239310SdimLibrary General Public License for more details. 14249423Sdim 15249423SdimYou should have received a copy of the GNU Library General Public 16249423SdimLicense along with libiberty; see the file COPYING.LIB. If not, 17249423Sdimwrite to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 18249423SdimBoston, MA 02110-1301, USA. */ 19249423Sdim 20239310Sdim#ifdef HAVE_CONFIG_H 21239310Sdim#include "config.h" 22239310Sdim#endif 23239310Sdim 24249423Sdim#include <stdio.h> /* May get P_tmpdir. */ 25239310Sdim#ifdef HAVE_STDLIB_H 26239310Sdim#include <stdlib.h> 27239310Sdim#endif 28239310Sdim#ifdef HAVE_STRING_H 29239310Sdim#include <string.h> 30239310Sdim#endif 31239310Sdim 32239310Sdim#include "libiberty.h" 33239310Sdimextern char *choose_tmpdir (void); 34239310Sdim 35239310Sdim/* Name of temporary file. 36239310Sdim mktemp requires 6 trailing X's. */ 37239310Sdim#define TEMP_FILE "ccXXXXXX" 38239310Sdim#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) 39263508Sdim 40239310Sdim/* 41239310Sdim 42239310Sdim@deftypefn Extension char* choose_temp_base (void) 43239310Sdim 44239310SdimReturn a prefix for temporary file names or @code{NULL} if unable to 45239310Sdimfind one. The current directory is chosen if all else fails so the 46239310Sdimprogram is exited if a temporary directory can't be found (@code{mktemp} 47239310Sdimfails). The buffer for the result is obtained with @code{xmalloc}. 48239310Sdim 49239310SdimThis function is provided for backwards compatability only. Its use is 50239310Sdimnot recommended. 51239310Sdim 52239310Sdim@end deftypefn 53239310Sdim 54239310Sdim*/ 55239310Sdim 56239310Sdimchar * 57239310Sdimchoose_temp_base (void) 58239310Sdim{ 59239310Sdim const char *base = choose_tmpdir (); 60239310Sdim char *temp_filename; 61239310Sdim int len; 62239310Sdim 63239310Sdim len = strlen (base); 64239310Sdim temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1); 65239310Sdim strcpy (temp_filename, base); 66239310Sdim strcpy (temp_filename + len, TEMP_FILE); 67239310Sdim 68239310Sdim if (mktemp (temp_filename) == 0) 69239310Sdim abort (); 70239310Sdim return temp_filename; 71239310Sdim} 72239310Sdim