1 /* Copyright (C) 2002-2020 Free Software Foundation, Inc. 2 Contributed by Andy Vaught 3 4 This file is part of the GNU Fortran 95 runtime library (libgfortran). 5 6 Libgfortran is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 Libgfortran is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 Under Section 7 of GPL version 3, you are granted additional 17 permissions described in the GCC Runtime Library Exception, version 18 3.1, as published by the Free Software Foundation. 19 20 You should have received a copy of the GNU General Public License and 21 a copy of the GCC Runtime Library Exception along with this program; 22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 <http://www.gnu.org/licenses/>. */ 24 25 #include "io.h" 26 #include "unix.h" 27 #include "async.h" 28 #include <limits.h> 29 #if !HAVE_UNLINK_OPEN_FILE 30 #include <string.h> 31 #endif 32 33 typedef enum 34 { CLOSE_INVALID = - 1, CLOSE_DELETE, CLOSE_KEEP, CLOSE_UNSPECIFIED } 35 close_status; 36 37 static const st_option status_opt[] = { 38 {"keep", CLOSE_KEEP}, 39 {"delete", CLOSE_DELETE}, 40 {NULL, 0} 41 }; 42 43 44 extern void st_close (st_parameter_close *); 45 export_proto(st_close); 46 47 void 48 st_close (st_parameter_close *clp) 49 { 50 close_status status; 51 gfc_unit *u; 52 #if !HAVE_UNLINK_OPEN_FILE 53 char *path; 54 55 path = NULL; 56 #endif 57 58 library_start (&clp->common); 59 60 status = !(clp->common.flags & IOPARM_CLOSE_HAS_STATUS) ? CLOSE_UNSPECIFIED : 61 find_option (&clp->common, clp->status, clp->status_len, 62 status_opt, "Bad STATUS parameter in CLOSE statement"); 63 64 if (status == CLOSE_INVALID) 65 { 66 library_end (); 67 return; 68 } 69 70 u = find_unit (clp->common.unit); 71 72 if (ASYNC_IO && u && u->au) 73 if (async_wait (&(clp->common), u->au)) 74 { 75 library_end (); 76 return; 77 } 78 79 if ((clp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) 80 { 81 library_end (); 82 return; 83 } 84 85 if (u != NULL) 86 { 87 if (close_share (u) < 0) 88 generate_error (&clp->common, LIBERROR_OS, "Problem in CLOSE"); 89 if (u->flags.status == STATUS_SCRATCH) 90 { 91 if (status == CLOSE_KEEP) 92 generate_error (&clp->common, LIBERROR_BAD_OPTION, 93 "Can't KEEP a scratch file on CLOSE"); 94 #if !HAVE_UNLINK_OPEN_FILE 95 path = strdup (u->filename); 96 #endif 97 } 98 else 99 { 100 if (status == CLOSE_DELETE) 101 { 102 if (u->flags.readonly) 103 generate_warning (&clp->common, "STATUS set to DELETE on CLOSE" 104 " but file protected by READONLY specifier"); 105 else 106 { 107 #if HAVE_UNLINK_OPEN_FILE 108 109 if (remove (u->filename)) 110 generate_error (&clp->common, LIBERROR_OS, 111 "File cannot be deleted"); 112 #else 113 path = strdup (u->filename); 114 #endif 115 } 116 } 117 } 118 119 close_unit (u); 120 121 #if !HAVE_UNLINK_OPEN_FILE 122 if (path != NULL) 123 { 124 if (remove (path)) 125 generate_error (&clp->common, LIBERROR_OS, 126 "File cannot be deleted"); 127 free (path); 128 } 129 #endif 130 } 131 132 /* CLOSE on unconnected unit is legal and a no-op: F95 std., 9.3.5. */ 133 library_end (); 134 } 135