1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_shell.hxx"
26
27 #ifndef INCLUDED_RECENTLY_USED_FILE
28 #include "recently_used_file.hxx"
29 #endif
30 #include <rtl/ustring.hxx>
31 #include <osl/process.h>
32 #include <osl/security.hxx>
33 #include <osl/thread.h>
34 #include <osl/file.hxx>
35
36 #include <sys/file.h>
37 #include <sys/types.h>
38 #include <sys/stat.h>
39
40 #include <unistd.h>
41
42 const rtl::OUString RECENTLY_USED_FILE_NAME = rtl::OUString::createFromAscii(".recently-used");
43 const rtl::OUString SLASH = rtl::OUString::createFromAscii("/");
44
45 namespace /* private */ {
46
ensure_final_slash(rtl::OUString & path)47 inline void ensure_final_slash(/*inout*/ rtl::OUString& path)
48 {
49 if ((path.getLength() > 0) &&
50 (SLASH.pData->buffer[0] != path.pData->buffer[path.getLength() - 1]))
51 path += SLASH;
52 }
53
54 } // namespace private
55
56 //------------------------------------------------
recently_used_file()57 recently_used_file::recently_used_file() :
58 file_(NULL)
59 {
60 osl::Security sec;
61 rtl::OUString homedir_url;
62
63 if (sec.getHomeDir(homedir_url))
64 {
65 rtl::OUString homedir;
66 osl::FileBase::getSystemPathFromFileURL(homedir_url, homedir);
67
68 rtl::OUString rufn = homedir;
69 ensure_final_slash(rufn);
70 rufn += RECENTLY_USED_FILE_NAME;
71
72 rtl::OString tmp =
73 rtl::OUStringToOString(rufn, osl_getThreadTextEncoding());
74
75 file_ = fopen(tmp.getStr(), "r+");
76
77 /* create if not exist */
78 if (NULL == file_) {
79 mode_t umask_ = umask(S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
80 file_ = fopen(tmp.getStr(), "w+");
81 umask(umask_);
82 }
83
84 if (NULL == file_)
85 throw "I/O error opening ~/.recently-used";
86
87 if (lockf(fileno(file_), F_LOCK, 0) != 0)
88 {
89 fclose(file_);
90 throw "Cannot lock ~/.recently-used";
91 }
92 }
93 else
94 throw "Cannot determine user home directory";
95 }
96
97 //------------------------------------------------
~recently_used_file()98 recently_used_file::~recently_used_file()
99 {
100 lockf(fileno(file_), F_ULOCK, 0);
101 fclose(file_);
102 }
103
104 //------------------------------------------------
reset() const105 void recently_used_file::reset() const
106 {
107 rewind(file_);
108 }
109
110 //------------------------------------------------
truncate(off_t length)111 void recently_used_file::truncate(off_t length)
112 {
113 if (ftruncate(fileno(file_), length) == -1)
114 throw "I/O error: ftruncate failed";
115 }
116
117 //------------------------------------------------
read(char * buffer,size_t size) const118 size_t recently_used_file::read(char* buffer, size_t size) const
119 {
120 size_t r = fread(reinterpret_cast<void*>(buffer), sizeof(char), size, file_);
121
122 if ((r < size) && ferror(file_))
123 throw "I/O error: read failed";
124
125 return r;
126 }
127
128 //----------------------------
write(const char * buffer,size_t size) const129 void recently_used_file::write(const char* buffer, size_t size) const
130 {
131 if (size != fwrite(reinterpret_cast<const void*>(buffer), sizeof(char), size, file_))
132 throw "I/O error: write failed";
133 }
134
135 //----------------------------
eof() const136 bool recently_used_file::eof() const
137 {
138 return feof(file_);
139 }
140
141
142
143
144