1 /* Copyright (C) 2002-2019 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_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 u = find_unit (clp->common.unit); 65 66 if (ASYNC_IO && u && u->au) 67 if (async_wait (&(clp->common), u->au)) 68 { 69 library_end (); 70 return; 71 } 72 73 if ((clp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK) 74 { 75 library_end (); 76 return; 77 } 78 79 if (u != NULL) 80 { 81 if (close_share (u) < 0) 82 generate_error (&clp->common, LIBERROR_OS, "Problem in CLOSE"); 83 if (u->flags.status == STATUS_SCRATCH) 84 { 85 if (status == CLOSE_KEEP) 86 generate_error (&clp->common, LIBERROR_BAD_OPTION, 87 "Can't KEEP a scratch file on CLOSE"); 88 #if !HAVE_UNLINK_OPEN_FILE 89 path = strdup (u->filename); 90 #endif 91 } 92 else 93 { 94 if (status == CLOSE_DELETE) 95 { 96 if (u->flags.readonly) 97 generate_warning (&clp->common, "STATUS set to DELETE on CLOSE" 98 " but file protected by READONLY specifier"); 99 else 100 { 101 #if HAVE_UNLINK_OPEN_FILE 102 103 if (remove (u->filename)) 104 generate_error (&clp->common, LIBERROR_OS, 105 "File cannot be deleted"); 106 #else 107 path = strdup (u->filename); 108 #endif 109 } 110 } 111 } 112 113 close_unit (u); 114 115 #if !HAVE_UNLINK_OPEN_FILE 116 if (path != NULL) 117 { 118 if (remove (path)) 119 generate_error (&clp->common, LIBERROR_OS, 120 "File cannot be deleted"); 121 free (path); 122 } 123 #endif 124 } 125 126 /* CLOSE on unconnected unit is legal and a no-op: F95 std., 9.3.5. */ 127 library_end (); 128 } 129