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 33 bool 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 40 bool 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 45 std::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 66 void 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
