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1 | /* Copyright (C) 2002-2021 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 | } |