Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame] | 1 | /** |
| 2 | * @file locate_images.cpp |
| 3 | * Command-line helper |
| 4 | * |
| 5 | * @remark Copyright 2002 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author Philippe Elie |
| 9 | * @author John Levon |
| 10 | */ |
| 11 | |
| 12 | #include "file_manip.h" |
| 13 | #include "locate_images.h" |
| 14 | #include "string_manip.h" |
| 15 | |
| 16 | #include <cerrno> |
| 17 | #include <iostream> |
| 18 | #include <sstream> |
| 19 | #include <cstdlib> |
| 20 | |
| 21 | using namespace std; |
| 22 | |
| 23 | |
| 24 | int extra_images::suid; |
| 25 | |
| 26 | extra_images::extra_images() |
| 27 | : |
| 28 | uid(++suid) |
| 29 | { |
| 30 | } |
| 31 | |
| 32 | |
| 33 | void extra_images::populate(vector<string> const & paths, |
| 34 | string const & prefix_path) |
| 35 | { |
| 36 | vector<string>::const_iterator cit = paths.begin(); |
| 37 | vector<string>::const_iterator end = paths.end(); |
| 38 | for (; cit != end; ++cit) { |
| 39 | string const path = op_realpath(prefix_path + *cit); |
| 40 | list<string> file_list; |
| 41 | create_file_list(file_list, path, "*", true); |
| 42 | list<string>::const_iterator lit = file_list.begin(); |
| 43 | list<string>::const_iterator lend = file_list.end(); |
| 44 | for (; lit != lend; ++lit) { |
| 45 | value_type v(op_basename(*lit), op_dirname(*lit)); |
| 46 | images.insert(v); |
| 47 | } |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | |
| 52 | void extra_images::populate(vector<string> const & paths, |
| 53 | string const & archive_path_, |
| 54 | string const & root_path_) |
| 55 | { |
| 56 | archive_path = archive_path_; |
| 57 | if (!archive_path.empty()) |
| 58 | archive_path = op_realpath(archive_path); |
| 59 | |
| 60 | root_path = op_realpath(root_path_); |
| 61 | if (!root_path.empty()) |
| 62 | root_path = op_realpath(root_path); |
| 63 | |
| 64 | if (root_path.empty() && archive_path.empty()) |
| 65 | populate(paths, ""); |
| 66 | if (!archive_path.empty()) |
| 67 | populate(paths, archive_path); |
| 68 | if (!root_path.empty() && root_path != archive_path) |
| 69 | populate(paths, root_path); |
| 70 | } |
| 71 | |
| 72 | |
| 73 | vector<string> const extra_images::find(string const & name) const |
| 74 | { |
| 75 | extra_images::matcher match(name); |
| 76 | return find(match); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | vector<string> const |
| 81 | extra_images::find(extra_images::matcher const & match) const |
| 82 | { |
| 83 | vector<string> matches; |
| 84 | |
| 85 | const_iterator cit = images.begin(); |
| 86 | const_iterator end = images.end(); |
| 87 | |
| 88 | for (; cit != end; ++cit) { |
| 89 | if (match(cit->first)) |
| 90 | matches.push_back(cit->second + '/' + cit->first); |
| 91 | } |
| 92 | |
| 93 | return matches; |
| 94 | } |
| 95 | |
| 96 | |
| 97 | namespace { |
| 98 | |
| 99 | /** |
| 100 | * Function object for matching a module filename, which |
| 101 | * has its own special mangling rules in 2.6 kernels. |
| 102 | */ |
| 103 | struct module_matcher : public extra_images::matcher { |
| 104 | public: |
| 105 | explicit module_matcher(string const & s) |
| 106 | : extra_images::matcher(s) {} |
| 107 | |
| 108 | virtual bool operator()(string const & candidate) const { |
| 109 | if (candidate.length() != value.length()) |
| 110 | return false; |
| 111 | |
| 112 | for (string::size_type i = 0 ; i < value.length() ; ++i) { |
| 113 | if (value[i] == candidate[i]) |
| 114 | continue; |
| 115 | if (value[i] == '_' && |
| 116 | (candidate[i] == ',' || candidate[i] == '-')) |
| 117 | continue; |
| 118 | return false; |
| 119 | } |
| 120 | |
| 121 | return true; |
| 122 | } |
| 123 | }; |
| 124 | |
| 125 | } // anon namespace |
| 126 | |
| 127 | string const extra_images::locate_image(string const & image_name, |
| 128 | image_error & error, bool fixup) const |
| 129 | { |
| 130 | // Skip search since root_path can be non empty and we want |
| 131 | // to lookup only in root_path in this case. |
| 132 | if (!archive_path.empty()) { |
| 133 | string image = op_realpath(archive_path + image_name); |
| 134 | if (op_file_readable(image)) { |
| 135 | error = image_ok; |
| 136 | return fixup ? image : image_name; |
| 137 | } |
| 138 | |
| 139 | if (errno == EACCES) { |
| 140 | error = image_unreadable; |
| 141 | return image_name; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | // We catch a case where root_path.empty() since we skipped a |
| 146 | // search in "/" above when archive_path is empty. The case where |
| 147 | // root_path.empty() && archive_path.empty() is the normal one, none |
| 148 | // of --root or archive: as been given on command line. |
| 149 | if (!root_path.empty() || archive_path.empty()) { |
| 150 | string image = op_realpath(root_path + image_name); |
| 151 | if (op_file_readable(image)) { |
| 152 | error = image_ok; |
| 153 | return fixup ? image : image_name; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | error = image_not_found; |
| 158 | return image_name; |
| 159 | } |
| 160 | |
| 161 | string const extra_images::find_image_path(string const & image_name, |
| 162 | image_error & error, bool fixup) const |
| 163 | { |
| 164 | error = image_ok; |
| 165 | |
| 166 | string const image = locate_image(image_name, error, fixup); |
| 167 | if (error != image_not_found) |
| 168 | return image; |
| 169 | |
| 170 | string const base = op_basename(image); |
| 171 | |
| 172 | vector<string> result = find(base); |
| 173 | |
| 174 | // not found, try a module search |
| 175 | if (result.empty()) |
| 176 | result = find(module_matcher(base + ".ko")); |
| 177 | |
| 178 | if (result.empty()) { |
| 179 | error = image_not_found; |
| 180 | return image_name; |
| 181 | } |
| 182 | |
| 183 | if (result.size() == 1) { |
| 184 | error = image_ok; |
| 185 | return fixup ? result[0] : image_name; |
| 186 | } |
| 187 | |
Jeff Brown | 220b7ff | 2011-05-03 15:33:24 -0700 | [diff] [blame] | 188 | #ifdef ANDROID |
| 189 | // On Android, we often have both stripped and unstripped versions of the same |
| 190 | // library in the image path. Choose the first one found instead of issuing a |
| 191 | // multiple match error. |
| 192 | error = image_ok; |
| 193 | return fixup ? result[0] : image_name; |
| 194 | #else |
Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame] | 195 | // We can't get multiple result except if only one result is prefixed |
| 196 | // by archive_path or by root_path. |
| 197 | size_t count = 0; |
| 198 | size_t index = 0; |
| 199 | for (size_t i = 0; i < result.size() && count < 2; ++i) { |
| 200 | if (is_prefix(result[i], archive_path)) { |
| 201 | index = i; |
| 202 | ++count; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | if (count == 0) { |
| 207 | for (size_t i = 0; i < result.size() && count < 2; ++i) { |
| 208 | if (is_prefix(result[i], root_path)) { |
| 209 | index = i; |
| 210 | ++count; |
| 211 | } |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | if (count == 1) { |
| 216 | error = image_ok; |
| 217 | return fixup ? result[index] : image_name; |
| 218 | } |
| 219 | |
| 220 | error = image_multiple_match; |
| 221 | return image_name; |
Jeff Brown | 220b7ff | 2011-05-03 15:33:24 -0700 | [diff] [blame] | 222 | #endif |
Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | |
| 226 | string extra_images::strip_path_prefix(string const & image) const |
| 227 | { |
| 228 | if (archive_path.length() && is_prefix(image, archive_path)) |
| 229 | return image.substr(archive_path.size()); |
| 230 | if (root_path.length() && is_prefix(image, root_path)) |
| 231 | return image.substr(root_path.size()); |
| 232 | return image; |
| 233 | } |