1/*
2 * Copyright (C) 2015 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#define TRACE_TAG TRACE_ADB
18
19#include "adb_utils.h"
20
21#include <stdlib.h>
22#include <sys/stat.h>
23#include <sys/types.h>
24#include <unistd.h>
25
26#include <algorithm>
27
28#include <base/stringprintf.h>
29
30#include "adb_trace.h"
31#include "sysdeps.h"
32
33bool getcwd(std::string* s) {
34  char* cwd = getcwd(nullptr, 0);
35  if (cwd != nullptr) *s = cwd;
36  free(cwd);
37  return (cwd != nullptr);
38}
39
40bool directory_exists(const std::string& path) {
41  struct stat sb;
42  return lstat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode);
43}
44
45std::string escape_arg(const std::string& s) {
46  std::string result = s;
47
48  // Escape any ' in the string (before we single-quote the whole thing).
49  // The correct way to do this for the shell is to replace ' with '\'' --- that is,
50  // close the existing single-quoted string, escape a single single-quote, and start
51  // a new single-quoted string. Like the C preprocessor, the shell will concatenate
52  // these pieces into one string.
53  for (size_t i = 0; i < s.size(); ++i) {
54    if (s[i] == '\'') {
55      result.insert(i, "'\\'");
56      i += 2;
57    }
58  }
59
60  // Prefix and suffix the whole string with '.
61  result.insert(result.begin(), '\'');
62  result.push_back('\'');
63  return result;
64}
65
66void dump_hex(const void* data, size_t byte_count) {
67    byte_count = std::min(byte_count, size_t(16));
68
69    const uint8_t* p = reinterpret_cast<const uint8_t*>(data);
70
71    std::string line;
72    for (size_t i = 0; i < byte_count; ++i) {
73        android::base::StringAppendF(&line, "%02x", p[i]);
74    }
75    line.push_back(' ');
76
77    for (size_t i = 0; i < byte_count; ++i) {
78        int c = p[i];
79        if (c < 32 || c > 127) {
80            c = '.';
81        }
82        line.push_back(c);
83    }
84
85    DR("%s\n", line.c_str());
86}
87