1/* Implementation of the ACCESS intrinsic. 2 Copyright (C) 2006-2020 Free Software Foundation, Inc. 3 Contributed by Fran��ois-Xavier Coudert <coudert@clipper.ens.fr> 4 5This file is part of the GNU Fortran runtime library (libgfortran). 6 7Libgfortran is free software; you can redistribute it and/or 8modify it under the terms of the GNU General Public 9License as published by the Free Software Foundation; either 10version 3 of the License, or (at your option) any later version. 11 12Libgfortran is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17Under Section 7 of GPL version 3, you are granted additional 18permissions described in the GCC Runtime Library Exception, version 193.1, as published by the Free Software Foundation. 20 21You should have received a copy of the GNU General Public License and 22a copy of the GCC Runtime Library Exception along with this program; 23see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24<http://www.gnu.org/licenses/>. */ 25 26#include "libgfortran.h" 27 28#include <errno.h> 29 30#ifdef HAVE_UNISTD_H 31#include <unistd.h> 32#endif 33 34/* INTEGER FUNCTION ACCESS(NAME, MODE) 35 CHARACTER(len=*), INTENT(IN) :: NAME, MODE */ 36 37#ifdef HAVE_ACCESS 38extern int access_func (char *, char *, gfc_charlen_type, gfc_charlen_type); 39export_proto(access_func); 40 41int 42access_func (char *name, char *mode, gfc_charlen_type name_len, 43 gfc_charlen_type mode_len) 44{ 45 gfc_charlen_type i; 46 int m; 47 48 /* Parse the MODE string. */ 49 m = F_OK; 50 for (i = 0; i < mode_len && mode[i]; i++) 51 switch (mode[i]) 52 { 53 case ' ': 54 break; 55 56 case 'r': 57 case 'R': 58 m |= R_OK; 59 break; 60 61 case 'w': 62 case 'W': 63 m |= W_OK; 64 break; 65 66 case 'x': 67 case 'X': 68 m |= X_OK; 69 break; 70 71 default: 72 return -1; 73 break; 74 } 75 76 char *path = fc_strdup (name, name_len); 77 78 /* And make the call to access(). */ 79 int res = (access (path, m) == 0 ? 0 : errno); 80 81 free (path); 82 return res; 83} 84#endif 85