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
st_close(st_parameter_close * clp)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