adb_utils.cpp revision 3d5f60dbba3bc0feabc05457d181547b295bb3b2 
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
68int mkdirs(const char *path)
69{
70    int ret;
71    char *x = (char *)path + 1;
72
73    for(;;) {
74        x = adb_dirstart(x);
75        if(x == 0) return 0;
76        *x = 0;
77        ret = adb_mkdir(path, 0775);
78        *x = OS_PATH_SEPARATOR;
79        if((ret < 0) && (errno != EEXIST)) {
80            return ret;
81        }
82        x++;
83    }
84    return 0;
85}
86
87void dump_hex(const void* data, size_t byte_count) {
88    byte_count = std::min(byte_count, size_t(16));
89
90    const uint8_t* p = reinterpret_cast<const uint8_t*>(data);
91
92    std::string line;
93    for (size_t i = 0; i < byte_count; ++i) {
94        android::base::StringAppendF(&line, "%02x", p[i]);
95    }
96    line.push_back(' ');
97
98    for (size_t i = 0; i < byte_count; ++i) {
99        int c = p[i];
100        if (c < 32 || c > 127) {
101            c = '.';
102        }
103        line.push_back(c);
104    }
105
106    DR("%s\n", line.c_str());
107}
108
109bool parse_host_and_port(const std::string& address,
110                         std::string* canonical_address,
111                         std::string* host, int* port,
112                         std::string* error) {
113    host->clear();
114
115    bool ipv6 = true;
116    bool saw_port = false;
117    size_t colons = std::count(address.begin(), address.end(), ':');
118    size_t dots = std::count(address.begin(), address.end(), '.');
119    std::string port_str;
120    if (address[0] == '[') {
121      // [::1]:123
122      if (address.rfind("]:") == std::string::npos) {
123        *error = android::base::StringPrintf("bad IPv6 address '%s'", address.c_str());
124        return false;
125      }
126      *host = address.substr(1, (address.find("]:") - 1));
127      port_str = address.substr(address.rfind("]:") + 2);
128      saw_port = true;
129    } else if (dots == 0 && colons >= 2 && colons <= 7) {
130      // ::1
131      *host = address;
132    } else if (colons <= 1) {
133      // 1.2.3.4 or some.accidental.domain.com
134      ipv6 = false;
135      std::vector<std::string> pieces = android::base::Split(address, ":");
136      *host = pieces[0];
137      if (pieces.size() > 1) {
138        port_str = pieces[1];
139        saw_port = true;
140      }
141    }
142
143    if (host->empty()) {
144      *error = android::base::StringPrintf("no host in '%s'", address.c_str());
145      return false;
146    }
147
148    if (saw_port) {
149      if (sscanf(port_str.c_str(), "%d", port) != 1 || *port <= 0 || *port > 65535) {
150        *error = android::base::StringPrintf("bad port number '%s' in '%s'",
151                                             port_str.c_str(), address.c_str());
152        return false;
153      }
154    }
155
156    *canonical_address = android::base::StringPrintf(ipv6 ? "[%s]:%d" : "%s:%d", host->c_str(), *port);
157    LOG(DEBUG) << "parsed " << address << " as " << *host << " and " << *port
158               << " (" << *canonical_address << ")";
159    return true;
160}
161