Mercurial > irccd
annotate common/system.cpp @ 27:12dfbec74a9c
Docs: use Irccd.SystemError in functions throwing that error, #420
| author | David Demelier <markand@malikania.fr> |
|---|---|
| date | Sat, 20 Feb 2016 10:35:43 +0100 |
| parents | 03068f5ed79d |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * system.cpp -- platform dependent functions for system inspection | |
| 3 * | |
| 4 * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr> | |
| 5 * | |
| 6 * Permission to use, copy, modify, and/or distribute this software for any | |
| 7 * purpose with or without fee is hereby granted, provided that the above | |
| 8 * copyright notice and this permission notice appear in all copies. | |
| 9 * | |
| 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 17 */ | |
| 18 | |
| 19 #include <cstdlib> | |
| 20 #include <ctime> | |
| 21 #include <stdexcept> | |
| 22 | |
| 23 #include <irccd-config.h> | |
| 24 | |
| 25 #if defined(HAVE_SETPROGNAME) | |
| 26 # include <cstdlib> | |
| 27 #endif | |
| 28 | |
| 29 #if defined(IRCCD_SYSTEM_WINDOWS) | |
| 30 # include <sys/types.h> | |
| 31 # include <sys/timeb.h> | |
| 32 # include <Windows.h> | |
| 33 # include <Shlobj.h> | |
| 34 #else // All non Windows | |
| 35 #if defined(IRCCD_SYSTEM_MAC) | |
| 36 # include <sys/sysctl.h> | |
| 37 #endif | |
| 38 | |
| 39 #if defined(IRCCD_SYSTEM_LINUX) | |
| 40 # include <sys/sysinfo.h> | |
| 41 #endif | |
| 42 | |
| 43 # include <sys/utsname.h> | |
| 44 # include <sys/time.h> | |
| 45 # include <sys/types.h> | |
| 46 | |
| 47 # include <unistd.h> | |
| 48 | |
| 49 # include <cerrno> | |
| 50 # include <cstring> | |
| 51 # include <stdexcept> | |
| 52 # include <ctime> | |
| 53 | |
| 54 #endif | |
| 55 | |
| 56 /* For sys::setGid */ | |
| 57 #if defined(HAVE_SETGID) | |
| 58 # include <sys/types.h> | |
| 59 # include <unistd.h> | |
| 60 # include <grp.h> | |
| 61 #endif | |
| 62 | |
| 63 /* For sys::setUid */ | |
| 64 #if defined(HAVE_SETGID) | |
| 65 # include <sys/types.h> | |
| 66 # include <unistd.h> | |
| 67 # include <pwd.h> | |
| 68 #endif | |
| 69 | |
| 70 #include "filesystem.h" | |
| 71 #include "logger.h" | |
| 72 #include "system.h" | |
| 73 #include "util.h" | |
| 74 | |
| 75 namespace irccd { | |
| 76 | |
| 77 namespace sys { | |
| 78 | |
| 79 namespace { | |
| 80 | |
| 81 /* | |
| 82 * setHelper | |
| 83 * ------------------------------------------------------------------ | |
| 84 * | |
| 85 * This is an helper for setting the uid or gid. It accepts both numeric and string uid and gid. | |
| 86 * | |
| 87 * If a name is specified as uid/group, the lookup function will be called and must be getpwname or | |
| 88 * getgrname. Then, to get the id from the returned structure (struct passwd, struct group), the getter | |
| 89 * function will return either pw_uid or gr_gid. | |
| 90 * | |
| 91 * Finally, when the id is resolved, the setter function (setuid, setgid) will be called. | |
| 92 * | |
| 93 * @param typeName the type of id (uid or gid) | |
| 94 * @param value the value (numeric or name) | |
| 95 * @param lookup the lookup function to resolve the name (getpwnam or getgrnam) | |
| 96 * @param setter the function to apply the id (setuid or setgid) | |
| 97 * @param getter the function to get the id from the informal structure | |
| 98 */ | |
| 99 template <typename IntType, typename LookupFunc, typename SetterFunc, typename FieldGetter> | |
| 100 void setHelper(const std::string &typeName, const std::string &value, LookupFunc lookup, SetterFunc setter, FieldGetter getter) | |
| 101 { | |
| 102 IntType id; | |
| 103 | |
| 104 if (util::isNumber(value)) { | |
| 105 id = std::stoi(value); | |
| 106 } else { | |
| 107 auto info = lookup(value.c_str()); | |
| 108 | |
| 109 if (info == nullptr) { | |
| 110 log::warning() << "irccd: invalid " << typeName << ": " << std::strerror(errno) << std::endl; | |
| 111 return; | |
| 112 } else { | |
| 113 id = getter(info); | |
| 114 | |
| 115 log::debug() << "irccd: " << typeName << " " << value << " resolved to: " << id << std::endl; | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 if (setter(id) < 0) | |
| 120 log::warning() << "irccd: could not set " << typeName << ": " << std::strerror(errno) << std::endl; | |
| 121 else | |
| 122 log::info() << "irccd: setting " << typeName << " to " << value << std::endl; | |
| 123 } | |
| 124 | |
| 125 /* | |
| 126 * XXX: the setprogname() function keeps a pointer without copying it so when main's argv is modified, we're not using | |
| 127 * the same name so create our own copy. | |
| 128 */ | |
| 129 | |
| 130 std::string programNameCopy; | |
| 131 | |
| 132 } // !namespace | |
| 133 | |
| 134 void setProgramName(std::string name) noexcept | |
| 135 { | |
| 136 programNameCopy = std::move(name); | |
| 137 | |
| 138 #if defined(HAVE_SETPROGNAME) | |
| 139 setprogname(programNameCopy.c_str()); | |
| 140 #endif | |
| 141 } | |
| 142 | |
| 143 const std::string &programName() noexcept | |
| 144 { | |
| 145 return programNameCopy; | |
| 146 } | |
| 147 | |
| 148 std::string name() | |
| 149 { | |
| 150 #if defined(IRCCD_SYSTEM_LINUX) | |
| 151 return "Linux"; | |
| 152 #elif defined(IRCCD_SYSTEM_WINDOWS) | |
| 153 return "Windows"; | |
| 154 #elif defined(IRCCD_SYSTEM_FREEBSD) | |
| 155 return "FreeBSD"; | |
| 156 #elif defined(IRCCD_SYSTEM_OPENBSD) | |
| 157 return "OpenBSD"; | |
| 158 #elif defined(IRCCD_SYSTEM_NETBSD) | |
| 159 return "NetBSD"; | |
| 160 #elif defined(IRCCD_SYSTEM_MAC) | |
| 161 return "Mac"; | |
| 162 #else | |
| 163 return "Unknown"; | |
| 164 #endif | |
| 165 } | |
| 166 | |
| 167 std::string version() | |
| 168 { | |
| 169 #if defined(IRCCD_SYSTEM_WINDOWS) | |
| 170 auto version = GetVersion(); | |
| 171 auto major = (DWORD)(LOBYTE(LOWORD(version))); | |
| 172 auto minor = (DWORD)(HIBYTE(LOWORD(version))); | |
| 173 | |
| 174 return std::to_string(major) + "." + std::to_string(minor); | |
| 175 #else | |
| 176 struct utsname uts; | |
| 177 | |
| 178 if (uname(&uts) < 0) | |
|
23
03068f5ed79d
Misc: various style issues, #419
David Demelier <markand@malikania.fr>
parents:
0
diff
changeset
|
179 throw std::runtime_error(std::strerror(errno)); |
| 0 | 180 |
| 181 return std::string(uts.release); | |
| 182 #endif | |
| 183 } | |
| 184 | |
| 185 uint64_t uptime() | |
| 186 { | |
| 187 #if defined(IRCCD_SYSTEM_WINDOWS) | |
| 188 return ::GetTickCount64() / 1000; | |
| 189 #elif defined(IRCCD_SYSTEM_LINUX) | |
| 190 struct sysinfo info; | |
| 191 | |
| 192 if (sysinfo(&info) < 0) | |
|
23
03068f5ed79d
Misc: various style issues, #419
David Demelier <markand@malikania.fr>
parents:
0
diff
changeset
|
193 throw std::runtime_error(std::strerror(errno)); |
| 0 | 194 |
| 195 return info.uptime; | |
| 196 #elif defined(IRCCD_SYSTEM_MAC) | |
| 197 struct timeval boottime; | |
| 198 size_t length = sizeof (boottime); | |
| 199 int mib[2] = { CTL_KERN, KERN_BOOTTIME }; | |
| 200 | |
| 201 if (sysctl(mib, 2, &boottime, &length, nullptr, 0) < 0) | |
|
23
03068f5ed79d
Misc: various style issues, #419
David Demelier <markand@malikania.fr>
parents:
0
diff
changeset
|
202 throw std::runtime_error(std::strerror(errno)); |
| 0 | 203 |
| 204 time_t bsec = boottime.tv_sec, csec = time(nullptr); | |
| 205 | |
| 206 return difftime(csec, bsec); | |
| 207 #else | |
| 208 /* BSD */ | |
| 209 struct timespec ts; | |
| 210 | |
| 211 if (clock_gettime(CLOCK_UPTIME, &ts) < 0) | |
|
23
03068f5ed79d
Misc: various style issues, #419
David Demelier <markand@malikania.fr>
parents:
0
diff
changeset
|
212 throw std::runtime_error(std::strerror(errno)); |
| 0 | 213 |
| 214 return ts.tv_sec; | |
| 215 #endif | |
| 216 } | |
| 217 | |
| 218 uint64_t ticks() | |
| 219 { | |
| 220 #if defined(IRCCD_SYSTEM_WINDOWS) | |
| 221 _timeb tp; | |
| 222 | |
| 223 _ftime(&tp); | |
| 224 | |
| 225 return tp.time * 1000LL + tp.millitm; | |
| 226 #else | |
| 227 struct timeval tp; | |
| 228 | |
| 229 gettimeofday(&tp, NULL); | |
| 230 | |
| 231 return tp.tv_sec * 1000LL + tp.tv_usec / 1000; | |
| 232 #endif | |
| 233 } | |
| 234 | |
| 235 std::string home() | |
| 236 { | |
| 237 #if defined(IRCCD_SYSTEM_WINDOWS) | |
| 238 char path[MAX_PATH]; | |
| 239 | |
| 240 if (SHGetFolderPathA(nullptr, CSIDL_LOCAL_APPDATA, nullptr, 0, path) != S_OK) | |
| 241 return ""; | |
| 242 | |
| 243 return std::string(path); | |
| 244 #else | |
| 245 return env("HOME"); | |
| 246 #endif | |
| 247 } | |
| 248 | |
| 249 std::string env(const std::string &var) | |
| 250 { | |
| 251 auto value = std::getenv(var.c_str()); | |
| 252 | |
| 253 if (value == nullptr) | |
| 254 return ""; | |
| 255 | |
| 256 return value; | |
| 257 } | |
| 258 | |
| 259 #if defined(HAVE_SETUID) | |
| 260 | |
| 261 void setUid(const std::string &value) | |
| 262 { | |
| 263 setHelper<uid_t>("uid", value, &getpwnam, &setuid, [] (const struct passwd *pw) { | |
| 264 return pw->pw_uid; | |
| 265 }); | |
| 266 } | |
| 267 | |
| 268 #endif | |
| 269 | |
| 270 #if defined(HAVE_SETGID) | |
| 271 | |
| 272 void setGid(const std::string &value) | |
| 273 { | |
| 274 setHelper<gid_t>("gid", value, &getgrnam, &setgid, [] (const struct group *gr) { | |
| 275 return gr->gr_gid; | |
| 276 }); | |
| 277 } | |
| 278 | |
| 279 #endif | |
| 280 | |
| 281 } // !sys | |
| 282 | |
| 283 } // !irccd |