adb_utils.cpp revision 5200c6670f041550c23821fec8e8e49b30ef6d29 
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/logging.h>
29#include <base/stringprintf.h>
30#include <base/strings.h>
31
32#include "adb_trace.h"
33#include "sysdeps.h"
34
35bool getcwd(std::string* s) {
36  char* cwd = getcwd(nullptr, 0);
37  if (cwd != nullptr) *s = cwd;
38  free(cwd);
39  return (cwd != nullptr);
40}
41
42bool directory_exists(const std::string& path) {
43  struct stat sb;
44  return lstat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode);
45}
46
47std::string escape_arg(const std::string& s) {
48  std::string result = s;
49
50  // Escape any ' in the string (before we single-quote the whole thing).
51  // The correct way to do this for the shell is to replace ' with '\'' --- that is,
52  // close the existing single-quoted string, escape a single single-quote, and start
53  // a new single-quoted string. Like the C preprocessor, the shell will concatenate
54  // these pieces into one string.
55  for (size_t i = 0; i < s.size(); ++i) {
56    if (s[i] == '\'') {
57      result.insert(i, "'\\'");
58      i += 2;
59    }
60  }
61
62  // Prefix and suffix the whole string with '.
63  result.insert(result.begin(), '\'');
64  result.push_back('\'');
65  return result;
66}
67
68std::string adb_basename(const std::string& path) {
69    size_t base = path.find_last_of(OS_PATH_SEPARATORS);
70    return (base != std::string::npos) ? path.substr(base + 1) : path;
71}
72
73static bool real_mkdirs(const std::string& path) {
74    std::vector<std::string> path_components = android::base::Split(path, OS_PATH_SEPARATOR_STR);
75    // TODO: all the callers do unlink && mkdirs && adb_creat ---
76    // that's probably the operation we should expose.
77    path_components.pop_back();
78    std::string partial_path;
79    for (const auto& path_component : path_components) {
80        if (partial_path.back() != OS_PATH_SEPARATOR) partial_path += OS_PATH_SEPARATOR;
81        partial_path += path_component;
82        if (adb_mkdir(partial_path.c_str(), 0775) == -1 && errno != EEXIST) {
83            return false;
84        }
85    }
86    return true;
87}
88
89bool mkdirs(const std::string& path) {
90#if defined(_WIN32)
91    // Replace '/' with '\\' so we can share the code.
92    std::string clean_path = path;
93    std::replace(clean_path.begin(), clean_path.end(), '/', '\\');
94    return real_mkdirs(clean_path);
95#else
96    return real_mkdirs(path);
97#endif
98}
99
100void dump_hex(const void* data, size_t byte_count) {
101    byte_count = std::min(byte_count, size_t(16));
102
103    const uint8_t* p = reinterpret_cast<const uint8_t*>(data);
104
105    std::string line;
106    for (size_t i = 0; i < byte_count; ++i) {
107        android::base::StringAppendF(&line, "%02x", p[i]);
108    }
109    line.push_back(' ');
110
111    for (size_t i = 0; i < byte_count; ++i) {
112        int c = p[i];
113        if (c < 32 || c > 127) {
114            c = '.';
115        }
116        line.push_back(c);
117    }
118
119    DR("%s\n", line.c_str());
120}
121
122bool parse_host_and_port(const std::string& address,
123                         std::string* canonical_address,
124                         std::string* host, int* port,
125                         std::string* error) {
126    host->clear();
127
128    bool ipv6 = true;
129    bool saw_port = false;
130    size_t colons = std::count(address.begin(), address.end(), ':');
131    size_t dots = std::count(address.begin(), address.end(), '.');
132    std::string port_str;
133    if (address[0] == '[') {
134      // [::1]:123
135      if (address.rfind("]:") == std::string::npos) {
136        *error = android::base::StringPrintf("bad IPv6 address '%s'", address.c_str());
137        return false;
138      }
139      *host = address.substr(1, (address.find("]:") - 1));
140      port_str = address.substr(address.rfind("]:") + 2);
141      saw_port = true;
142    } else if (dots == 0 && colons >= 2 && colons <= 7) {
143      // ::1
144      *host = address;
145    } else if (colons <= 1) {
146      // 1.2.3.4 or some.accidental.domain.com
147      ipv6 = false;
148      std::vector<std::string> pieces = android::base::Split(address, ":");
149      *host = pieces[0];
150      if (pieces.size() > 1) {
151        port_str = pieces[1];
152        saw_port = true;
153      }
154    }
155
156    if (host->empty()) {
157      *error = android::base::StringPrintf("no host in '%s'", address.c_str());
158      return false;
159    }
160
161    if (saw_port) {
162      if (sscanf(port_str.c_str(), "%d", port) != 1 || *port <= 0 || *port > 65535) {
163        *error = android::base::StringPrintf("bad port number '%s' in '%s'",
164                                             port_str.c_str(), address.c_str());
165        return false;
166      }
167    }
168
169    *canonical_address = android::base::StringPrintf(ipv6 ? "[%s]:%d" : "%s:%d", host->c_str(), *port);
170    LOG(DEBUG) << "parsed " << address << " as " << *host << " and " << *port
171               << " (" << *canonical_address << ")";
172    return true;
173}
174