util.h revision 060b74baad7c366cb6c74042bf307f1548a8331f 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _INIT_UTIL_H_
18#define _INIT_UTIL_H_
19
20#include <sys/stat.h>
21#include <sys/types.h>
22
23#include <chrono>
24#include <functional>
25#include <ostream>
26#include <string>
27
28#include <android-base/chrono_utils.h>
29
30#define COLDBOOT_DONE "/dev/.coldboot_done"
31
32using android::base::boot_clock;
33using namespace std::chrono_literals;
34
35int create_socket(const char *name, int type, mode_t perm,
36                  uid_t uid, gid_t gid, const char *socketcon);
37
38bool read_file(const std::string& path, std::string* content);
39bool write_file(const std::string& path, const std::string& content);
40
41class Timer {
42  public:
43    Timer() : start_(boot_clock::now()) {}
44
45    double duration_s() const {
46        typedef std::chrono::duration<double> double_duration;
47        return std::chrono::duration_cast<double_duration>(boot_clock::now() - start_).count();
48    }
49
50    int64_t duration_ms() const {
51        return std::chrono::duration_cast<std::chrono::milliseconds>(boot_clock::now() - start_)
52            .count();
53    }
54
55  private:
56    android::base::boot_clock::time_point start_;
57};
58
59std::ostream& operator<<(std::ostream& os, const Timer& t);
60
61unsigned int decode_uid(const char *s);
62
63int mkdir_recursive(const std::string& pathname, mode_t mode);
64int wait_for_file(const char *filename, std::chrono::nanoseconds timeout);
65void import_kernel_cmdline(bool in_qemu,
66                           const std::function<void(const std::string&, const std::string&, bool)>&);
67int make_dir(const char *path, mode_t mode);
68int restorecon(const char *pathname, int flags = 0);
69std::string bytes_to_hex(const uint8_t *bytes, size_t bytes_len);
70bool is_dir(const char* pathname);
71bool expand_props(const std::string& src, std::string* dst);
72
73void panic() __attribute__((__noreturn__));
74
75#endif
76