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cell-binutils  2.17cvs20070401
choose-temp.c
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00001 /* Utility to pick a temporary filename prefix.
00002    Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
00003 
00004 This file is part of the libiberty library.
00005 Libiberty is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU Library General Public
00007 License as published by the Free Software Foundation; either
00008 version 2 of the License, or (at your option) any later version.
00009 
00010 Libiberty is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 Library General Public License for more details.
00014 
00015 You should have received a copy of the GNU Library General Public
00016 License along with libiberty; see the file COPYING.LIB.  If not,
00017 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
00018 Boston, MA 02110-1301, USA.  */
00019 
00020 #ifdef HAVE_CONFIG_H
00021 #include "config.h"
00022 #endif
00023 
00024 #include <stdio.h>   /* May get P_tmpdir.  */
00025 #ifdef HAVE_STDLIB_H
00026 #include <stdlib.h>
00027 #endif
00028 #ifdef HAVE_STRING_H
00029 #include <string.h>
00030 #endif
00031 
00032 #include "libiberty.h"
00033 extern char *choose_tmpdir (void);
00034 
00035 /* Name of temporary file.
00036    mktemp requires 6 trailing X's.  */
00037 #define TEMP_FILE "ccXXXXXX"
00038 #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
00039 
00040 /*
00041 
00042 @deftypefn Extension char* choose_temp_base (void)
00043 
00044 Return a prefix for temporary file names or @code{NULL} if unable to
00045 find one.  The current directory is chosen if all else fails so the
00046 program is exited if a temporary directory can't be found (@code{mktemp}
00047 fails).  The buffer for the result is obtained with @code{xmalloc}.
00048 
00049 This function is provided for backwards compatibility only.  Its use is
00050 not recommended.
00051 
00052 @end deftypefn
00053 
00054 */
00055 
00056 char *
00057 choose_temp_base (void)
00058 {
00059   const char *base = choose_tmpdir ();
00060   char *temp_filename;
00061   int len;
00062 
00063   len = strlen (base);
00064   temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1);
00065   strcpy (temp_filename, base);
00066   strcpy (temp_filename + len, TEMP_FILE);
00067 
00068   if (mktemp (temp_filename) == 0)
00069     abort ();
00070   return temp_filename;
00071 }