1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/* libs/graphics/ports/SkFontHost_fontconfig_direct.cpp
**
** Copyright 2009, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
// http://code.google.com/p/chromium/wiki/LinuxSandboxIPC
#include "SkFontHost_fontconfig_ipc.h"
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include "base/pickle.h"
#include "base/unix_domain_socket_posix.h"
FontConfigIPC::FontConfigIPC(int fd)
: fd_(fd) {
}
FontConfigIPC::~FontConfigIPC() {
close(fd_);
}
static ssize_t SyncIPC(int fd, uint8_t* reply, unsigned reply_len, int* result_fd,
const Pickle& request) {
int fds[2];
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, fds) == -1)
return false;
std::vector<int> fd_vector;
fd_vector.push_back(fds[1]);
if (!base::SendMsg(fd, request.data(), request.size(), fd_vector)) {
close(fds[0]);
close(fds[1]);
return -1;
}
close(fds[1]);
fd_vector.clear();
const ssize_t r = base::RecvMsg(fds[0], reply, reply_len, &fd_vector);
close(fds[0]);
if (r == -1)
return -1;
if ((fd_vector.size() > 0 && result_fd == NULL) || fd_vector.size() > 1) {
for (std::vector<int>::const_iterator
i = fd_vector.begin(); i != fd_vector.end(); ++i) {
close(*i);
}
return -1;
}
if (result_fd) {
if (fd_vector.size() == 0) {
*result_fd = -1;
} else {
*result_fd = fd_vector[0];
}
}
return r;
}
bool FontConfigIPC::Match(std::string* result_family,
unsigned* result_fileid,
bool fileid_valid, unsigned fileid,
const std::string& family, int is_bold,
int is_italic) {
Pickle request;
request.WriteInt(METHOD_MATCH);
request.WriteBool(fileid_valid);
if (fileid_valid)
request.WriteUInt32(fileid);
request.WriteBool(is_bold);
request.WriteBool(is_italic);
request.WriteString(family);
uint8_t reply_buf[512];
const ssize_t r = SyncIPC(fd_, reply_buf, sizeof(reply_buf), NULL, request);
if (r == -1)
return false;
Pickle reply(reinterpret_cast<char*>(reply_buf), r);
void* iter = NULL;
bool result;
if (!reply.ReadBool(&iter, &result))
return false;
if (!result)
return false;
uint32_t reply_fileid;
std::string reply_family;
if (!reply.ReadUInt32(&iter, &reply_fileid) ||
!reply.ReadString(&iter, &reply_family)) {
return false;
}
*result_fileid = reply_fileid;
if (result_family)
*result_family = reply_family;
return true;
}
int FontConfigIPC::Open(unsigned fileid) {
Pickle request;
request.WriteInt(METHOD_OPEN);
request.WriteUInt32(fileid);
int result_fd = -1;
uint8_t reply_buf[256];
const ssize_t r = SyncIPC(fd_, reply_buf, sizeof(reply_buf), &result_fd, request);
if (r == -1)
return -1;
Pickle reply(reinterpret_cast<char*>(reply_buf), r);
bool result;
void* iter = NULL;
if (!reply.ReadBool(&iter, &result) ||
!result) {
if (result_fd)
close(result_fd);
return -1;
}
return result_fd;
}
|
