1 /* Copyright (C) 2002-2018 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 <limits.h>
28 #if !HAVE_UNLINK_OPEN_FILE
29 #include <string.h>
30 #endif
31
32 typedef enum
33 { CLOSE_DELETE, CLOSE_KEEP, CLOSE_UNSPECIFIED }
34 close_status;
35
36 static const st_option status_opt[] = {
37 {"keep", CLOSE_KEEP},
38 {"delete", CLOSE_DELETE},
39 {NULL, 0}
40 };
41
42
43 extern void st_close (st_parameter_close *);
44 export_proto(st_close);
45
46 void
st_close(st_parameter_close * clp)47 st_close (st_parameter_close *clp)
48 {
49 close_status status;
50 gfc_unit *u;
51 #if !HAVE_UNLINK_OPEN_FILE
52 char *path;
53
54 path = NULL;
55 #endif
56
57 library_start (&clp->common);
58
59 status = !(clp->common.flags & IOPARM_CLOSE_HAS_STATUS) ? CLOSE_UNSPECIFIED :
60 find_option (&clp->common, clp->status, clp->status_len,
61 status_opt, "Bad STATUS parameter in CLOSE statement");
62
63 if ((clp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK)
64 {
65 library_end ();
66 return;
67 }
68
69 u = find_unit (clp->common.unit);
70 if (u != NULL)
71 {
72 if (close_share (u) < 0)
73 generate_error (&clp->common, LIBERROR_OS, "Problem in CLOSE");
74 if (u->flags.status == STATUS_SCRATCH)
75 {
76 if (status == CLOSE_KEEP)
77 generate_error (&clp->common, LIBERROR_BAD_OPTION,
78 "Can't KEEP a scratch file on CLOSE");
79 #if !HAVE_UNLINK_OPEN_FILE
80 path = strdup (u->filename);
81 #endif
82 }
83 else
84 {
85 if (status == CLOSE_DELETE)
86 {
87 if (u->flags.readonly)
88 generate_warning (&clp->common, "STATUS set to DELETE on CLOSE"
89 " but file protected by READONLY specifier");
90 else
91 {
92 #if HAVE_UNLINK_OPEN_FILE
93
94 if (remove (u->filename))
95 generate_error (&clp->common, LIBERROR_OS,
96 "File cannot be deleted");
97 #else
98 path = strdup (u->filename);
99 #endif
100 }
101 }
102 }
103
104 close_unit (u);
105
106 #if !HAVE_UNLINK_OPEN_FILE
107 if (path != NULL)
108 {
109 if (remove (path))
110 generate_error (&clp->common, LIBERROR_OS,
111 "File cannot be deleted");
112 free (path);
113 }
114 #endif
115 }
116
117 /* CLOSE on unconnected unit is legal and a no-op: F95 std., 9.3.5. */
118 library_end ();
119 }
120