Upstream | cc2ee17 | 1970-01-12 13:46:40 +0000 | [diff] [blame^] | 1 | /** |
| 2 | * @file oprof_start_util.cpp |
| 3 | * Miscellaneous helpers for the GUI start |
| 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 <dirent.h> |
| 13 | #include <unistd.h> |
| 14 | #include <glob.h> |
| 15 | |
| 16 | #include <cerrno> |
| 17 | #include <vector> |
| 18 | #include <cmath> |
| 19 | #include <sstream> |
| 20 | #include <iostream> |
| 21 | #include <fstream> |
| 22 | |
| 23 | #include <qfiledialog.h> |
| 24 | #include <qmessagebox.h> |
| 25 | |
| 26 | #include "op_file.h" |
| 27 | #include "file_manip.h" |
| 28 | #include "child_reader.h" |
| 29 | #include "op_libiberty.h" |
| 30 | |
| 31 | #include "oprof_start.h" |
| 32 | #include "oprof_start_util.h" |
| 33 | |
| 34 | using namespace std; |
| 35 | |
| 36 | namespace { |
| 37 | |
| 38 | // return the ~ expansion suffixed with a '/' |
| 39 | string const get_user_dir() |
| 40 | { |
| 41 | static string user_dir; |
| 42 | |
| 43 | if (user_dir.empty()) { |
| 44 | char * dir = getenv("HOME"); |
| 45 | if (!dir) { |
| 46 | cerr << "Can't determine home directory !\n" << endl; |
| 47 | exit(EXIT_FAILURE); |
| 48 | } |
| 49 | |
| 50 | user_dir = dir; |
| 51 | |
| 52 | if (user_dir.length() && user_dir[user_dir.length() -1] != '/') |
| 53 | user_dir += '/'; |
| 54 | } |
| 55 | |
| 56 | return user_dir; |
| 57 | } |
| 58 | |
| 59 | string daemon_pid; |
| 60 | |
| 61 | } // namespace anon |
| 62 | |
| 63 | daemon_status::daemon_status() |
| 64 | : running(false) |
| 65 | { |
| 66 | int HZ; |
| 67 | if (!daemon_pid.empty()) { |
| 68 | string const exec = |
| 69 | op_realpath(string("/proc/") + daemon_pid + "/exe"); |
| 70 | if (exec.empty()) |
| 71 | daemon_pid.erase(); |
| 72 | else |
| 73 | running = true; |
| 74 | } |
| 75 | |
| 76 | if (daemon_pid.empty()) { |
| 77 | DIR * dir; |
| 78 | struct dirent * dirent; |
| 79 | |
| 80 | if (!(dir = opendir("/proc"))) { |
| 81 | perror("oprofiled: /proc directory could not be opened. "); |
| 82 | exit(EXIT_FAILURE); |
| 83 | } |
| 84 | |
| 85 | while ((dirent = readdir(dir))) { |
| 86 | string const exec = |
| 87 | op_realpath(string("/proc/") |
| 88 | + dirent->d_name + "/exe"); |
| 89 | string const name = op_basename(exec); |
| 90 | if (name != "oprofiled") |
| 91 | continue; |
| 92 | |
| 93 | daemon_pid = dirent->d_name; |
| 94 | running = true; |
| 95 | } |
| 96 | |
| 97 | closedir(dir); |
| 98 | } |
| 99 | |
| 100 | HZ = sysconf(_SC_CLK_TCK); |
| 101 | if (HZ == -1) { |
| 102 | perror("oprofiled: Unable to determine clock ticks per second. "); |
| 103 | exit(EXIT_FAILURE); |
| 104 | } |
| 105 | |
| 106 | if (daemon_pid.empty()) |
| 107 | return; |
| 108 | |
| 109 | nr_interrupts = 0; |
| 110 | |
| 111 | switch (op_get_interface()) { |
| 112 | case OP_INTERFACE_24: |
| 113 | { |
| 114 | ifstream ifs3("/proc/sys/dev/oprofile/nr_interrupts"); |
| 115 | if (ifs3) |
| 116 | ifs3 >> nr_interrupts; |
| 117 | } |
| 118 | break; |
| 119 | case OP_INTERFACE_26: |
| 120 | { |
| 121 | static unsigned int old_sum_interrupts; |
| 122 | unsigned int sum_interrupts = 0; |
| 123 | glob_t file_names; |
| 124 | |
| 125 | file_names.gl_offs = 0; |
| 126 | glob("/dev/oprofile/stats/cpu*/sample_received", |
| 127 | GLOB_DOOFFS, NULL, &file_names); |
| 128 | |
| 129 | for (size_t i = 0; i < file_names.gl_pathc; ++i) { |
| 130 | ifstream ifs3(file_names.gl_pathv[i]); |
| 131 | if (ifs3) { |
| 132 | unsigned int file_interrupts; |
| 133 | ifs3 >> file_interrupts; |
| 134 | sum_interrupts += file_interrupts; |
| 135 | } |
| 136 | } |
| 137 | nr_interrupts = sum_interrupts - old_sum_interrupts; |
| 138 | old_sum_interrupts = sum_interrupts; |
| 139 | globfree(&file_names); |
| 140 | } |
| 141 | break; |
| 142 | default: |
| 143 | break; |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | |
| 148 | /** |
| 149 | * get_user_filename - get absolute filename of file in user $HOME |
| 150 | * @param filename the relative filename |
| 151 | * |
| 152 | * Get the absolute path of a file in a user's home directory. |
| 153 | */ |
| 154 | string const get_user_filename(string const & filename) |
| 155 | { |
| 156 | return get_user_dir() + "/" + filename; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | /** |
| 161 | * check_and_create_config_dir - make sure config dir is accessible |
| 162 | * |
| 163 | * Returns %true if the dir is accessible. |
| 164 | */ |
| 165 | bool check_and_create_config_dir() |
| 166 | { |
| 167 | string dir = get_user_filename(".oprofile"); |
| 168 | |
| 169 | char * name = xstrdup(dir.c_str()); |
| 170 | |
| 171 | if (create_dir(name)) { |
| 172 | ostringstream out; |
| 173 | out << "unable to create " << dir << " directory "; |
| 174 | out << "cause: " << strerror(errno); |
| 175 | QMessageBox::warning(0, 0, out.str().c_str()); |
| 176 | |
| 177 | free(name); |
| 178 | |
| 179 | return false; |
| 180 | } |
| 181 | |
| 182 | free(name); |
| 183 | return true; |
| 184 | } |
| 185 | |
| 186 | |
| 187 | /** |
| 188 | * format - re-format a string |
| 189 | * @param orig string to format |
| 190 | * @param maxlen width of line |
| 191 | * |
| 192 | * Re-formats a string to fit into a certain width, |
| 193 | * breaking lines at spaces between words. |
| 194 | * |
| 195 | * Returns the formatted string |
| 196 | */ |
| 197 | string const format(string const & orig, uint const maxlen) |
| 198 | { |
| 199 | string text(orig); |
| 200 | |
| 201 | istringstream ss(text); |
| 202 | vector<string> lines; |
| 203 | |
| 204 | string oline; |
| 205 | string line; |
| 206 | |
| 207 | while (getline(ss, oline)) { |
| 208 | if (line.size() + oline.size() < maxlen) { |
| 209 | lines.push_back(line + oline); |
| 210 | line.erase(); |
| 211 | } else { |
| 212 | lines.push_back(line); |
| 213 | line.erase(); |
| 214 | string s; |
| 215 | string word; |
| 216 | istringstream oss(oline); |
| 217 | while (oss >> word) { |
| 218 | if (line.size() + word.size() > maxlen) { |
| 219 | lines.push_back(line); |
| 220 | line.erase(); |
| 221 | } |
| 222 | line += word + " "; |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | if (line.size()) |
| 228 | lines.push_back(line); |
| 229 | |
| 230 | string ret; |
| 231 | |
| 232 | for(vector<string>::const_iterator it = lines.begin(); it != lines.end(); ++it) |
| 233 | ret += *it + "\n"; |
| 234 | |
| 235 | return ret; |
| 236 | } |
| 237 | |
| 238 | |
| 239 | /** |
| 240 | * do_exec_command - execute a command |
| 241 | * @param cmd command name |
| 242 | * @param args arguments to command |
| 243 | * |
| 244 | * Execute a command synchronously. An error message is shown |
| 245 | * if the command returns a non-zero status, which is also returned. |
| 246 | * |
| 247 | * The arguments are verified and will refuse to execute if they contain |
| 248 | * shell metacharacters. |
| 249 | */ |
| 250 | int do_exec_command(string const & cmd, vector<string> const & args) |
| 251 | { |
| 252 | ostringstream err; |
| 253 | bool ok = true; |
| 254 | |
| 255 | // verify arguments |
| 256 | for (vector<string>::const_iterator cit = args.begin(); |
| 257 | cit != args.end(); ++cit) { |
| 258 | if (verify_argument(*cit)) |
| 259 | continue; |
| 260 | |
| 261 | QMessageBox::warning(0, 0, |
| 262 | string( |
| 263 | "Could not execute: Argument \"" + *cit + |
| 264 | "\" contains shell metacharacters.\n").c_str()); |
| 265 | return EINVAL; |
| 266 | } |
| 267 | |
| 268 | child_reader reader(cmd, args); |
| 269 | if (reader.error()) |
| 270 | ok = false; |
| 271 | |
| 272 | if (ok) |
| 273 | reader.get_data(cout, err); |
| 274 | |
| 275 | int ret = reader.terminate_process(); |
| 276 | if (ret) { |
| 277 | string error = reader.error_str() + "\n"; |
| 278 | error += "Failed: \n" + err.str() + "\n"; |
| 279 | string cmdline = cmd; |
| 280 | for (vector<string>::const_iterator cit = args.begin(); |
| 281 | cit != args.end(); ++cit) { |
| 282 | cmdline += " " + *cit + " "; |
| 283 | } |
| 284 | error += "\n\nCommand was :\n\n" + cmdline + "\n"; |
| 285 | |
| 286 | QMessageBox::warning(0, 0, format(error, 50).c_str()); |
| 287 | } |
| 288 | |
| 289 | return ret; |
| 290 | } |
| 291 | |
| 292 | |
| 293 | /** |
| 294 | * do_open_file_or_dir - open file/directory |
| 295 | * @param base_dir directory to start at |
| 296 | * @param dir_only directory or filename to select |
| 297 | * |
| 298 | * Select a file or directory. The selection is returned; |
| 299 | * an empty string if the selection was cancelled. |
| 300 | */ |
| 301 | string const do_open_file_or_dir(string const & base_dir, bool dir_only) |
| 302 | { |
| 303 | QString result; |
| 304 | |
| 305 | if (dir_only) { |
| 306 | result = QFileDialog::getExistingDirectory(base_dir.c_str(), 0, |
| 307 | "open_file_or_dir", "Get directory name", true); |
| 308 | } else { |
| 309 | result = QFileDialog::getOpenFileName(base_dir.c_str(), 0, 0, |
| 310 | "open_file_or_dir", "Get filename"); |
| 311 | } |
| 312 | |
| 313 | if (result.isNull()) |
| 314 | return string(); |
| 315 | else |
| 316 | return result.latin1(); |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * verify_argument - check string for potentially dangerous characters |
| 321 | * |
| 322 | * This function returns false if the string contains dangerous shell |
| 323 | * metacharacters. |
| 324 | * |
| 325 | * WWW Security FAQ dangerous chars: |
| 326 | * |
| 327 | * & ; ` ' \ " | * ? ~ < > ^ ( ) [ ] { } $ \n \r |
| 328 | * |
| 329 | * David Wheeler: ! # |
| 330 | * |
| 331 | * We allow '-' because we disallow whitespace. We allow ':' and '=' |
| 332 | */ |
| 333 | bool verify_argument(string const & str) |
| 334 | { |
| 335 | if (str.find_first_not_of( |
| 336 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| 337 | "abcdefghijklmnopqrstuvwxyz0123456789_:=-+%,./") |
| 338 | != string::npos) |
| 339 | return false; |
| 340 | return true; |
| 341 | } |