1 /* Utility to pick a temporary filename prefix. 2 Copyright (C) 1996-2018 Free Software Foundation, Inc. 3 4 This file is part of the libiberty library. 5 Libiberty is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Library General Public 7 License as published by the Free Software Foundation; either 8 version 2 of the License, or (at your option) any later version. 9 10 Libiberty is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Library General Public License for more details. 14 15 You should have received a copy of the GNU Library General Public 16 License along with libiberty; see the file COPYING.LIB. If not, 17 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 18 Boston, 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 47 Return a prefix for temporary file names or @code{NULL} if unable to 48 find one. The current directory is chosen if all else fails so the 49 program is exited if a temporary directory can't be found (@code{mktemp} 50 fails). The buffer for the result is obtained with @code{xmalloc}. 51 52 This function is provided for backwards compatibility only. Its use is 53 not recommended. 54 55 @end deftypefn 56 57 */ 58 59 char * 60 choose_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