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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
Provide access methods to various configuration settings,
setup defaults and returns validate settings.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include <apt-pkg/aptconfiguration.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/macros.h>
#include <apt-pkg/strutl.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <fcntl.h>
#include <algorithm>
#include <string>
#include <vector>
/*}}}*/
namespace APT {
// getCompressionTypes - Return Vector of usbale compressiontypes /*{{{*/
// ---------------------------------------------------------------------
/* return a vector of compression types in the prefered order. */
std::vector<std::string>
const Configuration::getCompressionTypes(bool const &Cached) {
static std::vector<std::string> types;
if (types.empty() == false) {
if (Cached == true)
return types;
else
types.clear();
}
// setup the defaults for the compressiontypes => method mapping
_config->CndSet("Acquire::CompressionTypes::bz2","bzip2");
_config->CndSet("Acquire::CompressionTypes::xz","xz");
_config->CndSet("Acquire::CompressionTypes::lzma","lzma");
_config->CndSet("Acquire::CompressionTypes::gz","gzip");
setDefaultConfigurationForCompressors();
std::vector<APT::Configuration::Compressor> const compressors = getCompressors();
// accept non-list order as override setting for config settings on commandline
std::string const overrideOrder = _config->Find("Acquire::CompressionTypes::Order","");
if (overrideOrder.empty() == false)
types.push_back(overrideOrder);
// load the order setting into our vector
std::vector<std::string> const order = _config->FindVector("Acquire::CompressionTypes::Order");
for (std::vector<std::string>::const_iterator o = order.begin();
o != order.end(); ++o) {
if ((*o).empty() == true)
continue;
// ignore types we have no method ready to use
std::string const method = std::string("Acquire::CompressionTypes::").append(*o);
if (_config->Exists(method) == false)
continue;
// ignore types we have no app ready to use
std::string const app = _config->Find(method);
std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
for (; c != compressors.end(); ++c)
if (c->Name == app)
break;
if (c == compressors.end())
continue;
types.push_back(*o);
}
// move again over the option tree to add all missing compression types
::Configuration::Item const *Types = _config->Tree("Acquire::CompressionTypes");
if (Types != 0)
Types = Types->Child;
for (; Types != 0; Types = Types->Next) {
if (Types->Tag == "Order" || Types->Tag.empty() == true)
continue;
// ignore types we already have in the vector
if (std::find(types.begin(),types.end(),Types->Tag) != types.end())
continue;
// ignore types we have no app ready to use
std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
for (; c != compressors.end(); ++c)
if (c->Name == Types->Value)
break;
if (c == compressors.end())
continue;
types.push_back(Types->Tag);
}
// add the special "uncompressed" type
if (std::find(types.begin(), types.end(), "uncompressed") == types.end())
{
std::string const uncompr = _config->FindFile("Dir::Bin::uncompressed", "");
if (uncompr.empty() == true || FileExists(uncompr) == true)
types.push_back("uncompressed");
}
return types;
}
/*}}}*/
// GetLanguages - Return Vector of Language Codes /*{{{*/
// ---------------------------------------------------------------------
/* return a vector of language codes in the prefered order.
the special word "environment" will be replaced with the long and the short
code of the local settings and it will be insured that this will not add
duplicates. So in an german local the setting "environment, de_DE, en, de"
will result in "de_DE, de, en".
The special word "none" is the stopcode for the not-All code vector */
std::vector<std::string> const Configuration::getLanguages(bool const &All,
bool const &Cached, char const ** const Locale) {
using std::string;
// The detection is boring and has a lot of cornercases,
// so we cache the results to calculated it only once.
std::vector<string> static allCodes;
std::vector<string> static codes;
// we have something in the cache
if (codes.empty() == false || allCodes.empty() == false) {
if (Cached == true) {
if(All == true && allCodes.empty() == false)
return allCodes;
else
return codes;
} else {
allCodes.clear();
codes.clear();
}
}
// Include all Language codes we have a Translation file for in /var/lib/apt/lists
// so they will be all included in the Cache.
std::vector<string> builtin;
DIR *D = opendir(_config->FindDir("Dir::State::lists").c_str());
if (D != 0) {
builtin.push_back("none");
for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) {
string const name = SubstVar(Ent->d_name, "%5f", "_");
size_t const foundDash = name.rfind("-");
size_t const foundUnderscore = name.rfind("_", foundDash);
if (foundDash == string::npos || foundUnderscore == string::npos ||
foundDash <= foundUnderscore ||
name.substr(foundUnderscore+1, foundDash-(foundUnderscore+1)) != "Translation")
continue;
string const c = name.substr(foundDash+1);
if (unlikely(c.empty() == true) || c == "en")
continue;
// Skip unusual files, like backups or that alike
string::const_iterator s = c.begin();
for (;s != c.end(); ++s) {
if (isalpha(*s) == 0 && *s != '_')
break;
}
if (s != c.end())
continue;
if (std::find(builtin.begin(), builtin.end(), c) != builtin.end())
continue;
builtin.push_back(c);
}
}
closedir(D);
// FIXME: Remove support for the old APT::Acquire::Translation
// it was undocumented and so it should be not very widthly used
string const oldAcquire = _config->Find("APT::Acquire::Translation","");
if (oldAcquire.empty() == false && oldAcquire != "environment") {
// TRANSLATORS: the two %s are APT configuration options
_error->Notice("Option '%s' is deprecated. Please use '%s' instead, see 'man 5 apt.conf' for details.",
"APT::Acquire::Translation", "Acquire::Languages");
if (oldAcquire != "none")
codes.push_back(oldAcquire);
codes.push_back("en");
allCodes = codes;
for (std::vector<string>::const_iterator b = builtin.begin();
b != builtin.end(); ++b)
if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
allCodes.push_back(*b);
if (All == true)
return allCodes;
else
return codes;
}
// get the environment language codes: LC_MESSAGES (and later LANGUAGE)
// we extract both, a long and a short code and then we will
// check if we actually need both (rare) or if the short is enough
string const envMsg = string(Locale == 0 ? std::setlocale(LC_MESSAGES, NULL) : *Locale);
size_t const lenShort = (envMsg.find('_') != string::npos) ? envMsg.find('_') : 2;
size_t const lenLong = (envMsg.find_first_of(".@") != string::npos) ? envMsg.find_first_of(".@") : (lenShort + 3);
string const envLong = envMsg.substr(0,lenLong);
string const envShort = envLong.substr(0,lenShort);
// It is very likely we will need the environment codes later,
// so let us generate them now from LC_MESSAGES and LANGUAGE
std::vector<string> environment;
if (envShort != "C") {
// take care of LC_MESSAGES
if (envLong != envShort)
environment.push_back(envLong);
environment.push_back(envShort);
// take care of LANGUAGE
const char *language_env = getenv("LANGUAGE") == 0 ? "" : getenv("LANGUAGE");
string envLang = Locale == 0 ? language_env : *(Locale+1);
if (envLang.empty() == false) {
std::vector<string> env = VectorizeString(envLang,':');
short addedLangs = 0; // add a maximum of 3 fallbacks from the environment
for (std::vector<string>::const_iterator e = env.begin();
e != env.end() && addedLangs < 3; ++e) {
if (unlikely(e->empty() == true) || *e == "en")
continue;
if (*e == envLong || *e == envShort)
continue;
if (std::find(environment.begin(), environment.end(), *e) != environment.end())
continue;
++addedLangs;
environment.push_back(*e);
}
}
} else {
environment.push_back("en");
}
// Support settings like Acquire::Languages=none on the command line to
// override the configuration settings vector of languages.
string const forceLang = _config->Find("Acquire::Languages","");
if (forceLang.empty() == false) {
if (forceLang == "none") {
codes.clear();
allCodes.clear();
allCodes.push_back("none");
} else {
if (forceLang == "environment")
codes = environment;
else
codes.push_back(forceLang);
allCodes = codes;
for (std::vector<string>::const_iterator b = builtin.begin();
b != builtin.end(); ++b)
if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
allCodes.push_back(*b);
}
if (All == true)
return allCodes;
else
return codes;
}
// cornercase: LANG=C, so we use only "en" Translation
if (envShort == "C") {
allCodes = codes = environment;
allCodes.insert(allCodes.end(), builtin.begin(), builtin.end());
if (All == true)
return allCodes;
else
return codes;
}
std::vector<string> const lang = _config->FindVector("Acquire::Languages");
// the default setting -> "environment, en"
if (lang.empty() == true) {
codes = environment;
if (envShort != "en")
codes.push_back("en");
allCodes = codes;
for (std::vector<string>::const_iterator b = builtin.begin();
b != builtin.end(); ++b)
if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
allCodes.push_back(*b);
if (All == true)
return allCodes;
else
return codes;
}
// the configs define the order, so add the environment
// then needed and ensure the codes are not listed twice.
bool noneSeen = false;
for (std::vector<string>::const_iterator l = lang.begin();
l != lang.end(); ++l) {
if (*l == "environment") {
for (std::vector<string>::const_iterator e = environment.begin();
e != environment.end(); ++e) {
if (std::find(allCodes.begin(), allCodes.end(), *e) != allCodes.end())
continue;
if (noneSeen == false)
codes.push_back(*e);
allCodes.push_back(*e);
}
continue;
} else if (*l == "none") {
noneSeen = true;
continue;
} else if (std::find(allCodes.begin(), allCodes.end(), *l) != allCodes.end())
continue;
if (noneSeen == false)
codes.push_back(*l);
allCodes.push_back(*l);
}
for (std::vector<string>::const_iterator b = builtin.begin();
b != builtin.end(); ++b)
if (std::find(allCodes.begin(), allCodes.end(), *b) == allCodes.end())
allCodes.push_back(*b);
if (All == true)
return allCodes;
else
return codes;
}
/*}}}*/
// getArchitectures - Return Vector of prefered Architectures /*{{{*/
std::vector<std::string> const Configuration::getArchitectures(bool const &Cached) {
using std::string;
std::vector<string> static archs;
if (likely(Cached == true) && archs.empty() == false)
return archs;
string const arch = _config->Find("APT::Architecture");
archs = _config->FindVector("APT::Architectures");
if (unlikely(arch.empty() == true))
return archs;
// FIXME: It is a bit unclean to have debian specific code hereā€¦
if (archs.empty() == true) {
archs.push_back(arch);
// Generate the base argument list for dpkg
std::vector<const char *> Args;
string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
{
string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
size_t dpkgChrootLen = dpkgChrootDir.length();
if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0) {
if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
--dpkgChrootLen;
Tmp = Tmp.substr(dpkgChrootLen);
}
}
Args.push_back(Tmp.c_str());
// Stick in any custom dpkg options
::Configuration::Item const *Opts = _config->Tree("DPkg::Options");
if (Opts != 0) {
Opts = Opts->Child;
for (; Opts != 0; Opts = Opts->Next)
{
if (Opts->Value.empty() == true)
continue;
Args.push_back(Opts->Value.c_str());
}
}
Args.push_back("--print-foreign-architectures");
Args.push_back(NULL);
int external[2] = {-1, -1};
if (pipe(external) != 0)
{
_error->WarningE("getArchitecture", "Can't create IPC pipe for dpkg --print-foreign-architectures");
return archs;
}
pid_t dpkgMultiArch = ExecFork();
if (dpkgMultiArch == 0) {
close(external[0]);
std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
if (chrootDir != "/" && chroot(chrootDir.c_str()) != 0)
_error->WarningE("getArchitecture", "Couldn't chroot into %s for dpkg --print-foreign-architectures", chrootDir.c_str());
int const nullfd = open("/dev/null", O_RDONLY);
dup2(nullfd, STDIN_FILENO);
dup2(external[1], STDOUT_FILENO);
dup2(nullfd, STDERR_FILENO);
execvp(Args[0], (char**) &Args[0]);
_error->WarningE("getArchitecture", "Can't detect foreign architectures supported by dpkg!");
_exit(100);
}
close(external[1]);
FILE *dpkg = fdopen(external[0], "r");
char buf[1024];
if(dpkg != NULL) {
while (fgets(buf, sizeof(buf), dpkg) != NULL) {
char* arch = strtok(buf, " ");
while (arch != NULL) {
for (; isspace(*arch) != 0; ++arch);
if (arch[0] != '\0') {
char const* archend = arch;
for (; isspace(*archend) == 0 && *archend != '\0'; ++archend);
string a(arch, (archend - arch));
if (std::find(archs.begin(), archs.end(), a) == archs.end())
archs.push_back(a);
}
arch = strtok(NULL, " ");
}
}
fclose(dpkg);
}
ExecWait(dpkgMultiArch, "dpkg --print-foreign-architectures", true);
return archs;
}
if (archs.empty() == true ||
std::find(archs.begin(), archs.end(), arch) == archs.end())
archs.insert(archs.begin(), arch);
// erase duplicates and empty strings
for (std::vector<string>::reverse_iterator a = archs.rbegin();
a != archs.rend(); ++a) {
if (a->empty() == true || std::find(a + 1, archs.rend(), *a) != archs.rend())
archs.erase(a.base()-1);
if (a == archs.rend())
break;
}
return archs;
}
/*}}}*/
// checkArchitecture - are we interested in the given Architecture? /*{{{*/
bool const Configuration::checkArchitecture(std::string const &Arch) {
if (Arch == "all")
return true;
std::vector<std::string> const archs = getArchitectures(true);
return (std::find(archs.begin(), archs.end(), Arch) != archs.end());
}
/*}}}*/
// setDefaultConfigurationForCompressors /*{{{*/
void Configuration::setDefaultConfigurationForCompressors() {
// Set default application paths to check for optional compression types
_config->CndSet("Dir::Bin::bzip2", "/bin/bzip2");
_config->CndSet("Dir::Bin::xz", "/usr/bin/xz");
if (FileExists(_config->FindFile("Dir::Bin::xz")) == true) {
_config->Clear("Dir::Bin::lzma");
_config->Set("APT::Compressor::lzma::Binary", "xz");
if (_config->Exists("APT::Compressor::lzma::CompressArg") == false) {
_config->Set("APT::Compressor::lzma::CompressArg::", "--format=lzma");
_config->Set("APT::Compressor::lzma::CompressArg::", "-9");
}
if (_config->Exists("APT::Compressor::lzma::UncompressArg") == false) {
_config->Set("APT::Compressor::lzma::UncompressArg::", "--format=lzma");
_config->Set("APT::Compressor::lzma::UncompressArg::", "-d");
}
} else {
_config->CndSet("Dir::Bin::lzma", "/usr/bin/lzma");
if (_config->Exists("APT::Compressor::lzma::CompressArg") == false) {
_config->Set("APT::Compressor::lzma::CompressArg::", "--suffix=");
_config->Set("APT::Compressor::lzma::CompressArg::", "-9");
}
if (_config->Exists("APT::Compressor::lzma::UncompressArg") == false) {
_config->Set("APT::Compressor::lzma::UncompressArg::", "--suffix=");
_config->Set("APT::Compressor::lzma::UncompressArg::", "-d");
}
}
}
/*}}}*/
// getCompressors - Return Vector of usbale compressors /*{{{*/
// ---------------------------------------------------------------------
/* return a vector of compressors used by apt-ftparchive in the
multicompress functionality or to detect data.tar files */
std::vector<APT::Configuration::Compressor>
const Configuration::getCompressors(bool const Cached) {
static std::vector<APT::Configuration::Compressor> compressors;
if (compressors.empty() == false) {
if (Cached == true)
return compressors;
else
compressors.clear();
}
setDefaultConfigurationForCompressors();
compressors.push_back(Compressor(".", "", "", NULL, NULL, 1));
if (_config->Exists("Dir::Bin::gzip") == false || FileExists(_config->FindFile("Dir::Bin::gzip")) == true)
compressors.push_back(Compressor("gzip",".gz","gzip","-9n","-d",2));
#ifdef HAVE_ZLIB
else
compressors.push_back(Compressor("gzip",".gz","false", NULL, NULL, 2));
#endif
if (_config->Exists("Dir::Bin::bzip2") == false || FileExists(_config->FindFile("Dir::Bin::bzip2")) == true)
compressors.push_back(Compressor("bzip2",".bz2","bzip2","-9","-d",3));
#ifdef HAVE_BZ2
else
compressors.push_back(Compressor("bzip2",".bz2","false", NULL, NULL, 3));
#endif
if (_config->Exists("Dir::Bin::xz") == false || FileExists(_config->FindFile("Dir::Bin::xz")) == true)
compressors.push_back(Compressor("xz",".xz","xz","-6","-d",4));
if (_config->Exists("Dir::Bin::lzma") == false || FileExists(_config->FindFile("Dir::Bin::lzma")) == true)
compressors.push_back(Compressor("lzma",".lzma","lzma","-9","-d",5));
std::vector<std::string> const comp = _config->FindVector("APT::Compressor");
for (std::vector<std::string>::const_iterator c = comp.begin();
c != comp.end(); ++c) {
if (*c == "." || *c == "gzip" || *c == "bzip2" || *c == "lzma" || *c == "xz")
continue;
compressors.push_back(Compressor(c->c_str(), std::string(".").append(*c).c_str(), c->c_str(), "-9", "-d", 100));
}
return compressors;
}
/*}}}*/
// getCompressorExtensions - supported data.tar extensions /*{{{*/
// ---------------------------------------------------------------------
/* */
std::vector<std::string> const Configuration::getCompressorExtensions() {
std::vector<APT::Configuration::Compressor> const compressors = getCompressors();
std::vector<std::string> ext;
for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin();
c != compressors.end(); ++c)
if (c->Extension.empty() == false && c->Extension != ".")
ext.push_back(c->Extension);
return ext;
}
/*}}}*/
// Compressor constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
Configuration::Compressor::Compressor(char const *name, char const *extension,
char const *binary,
char const *compressArg, char const *uncompressArg,
unsigned short const cost) {
std::string const config = std::string("APT::Compressor::").append(name).append("::");
Name = _config->Find(std::string(config).append("Name"), name);
Extension = _config->Find(std::string(config).append("Extension"), extension);
Binary = _config->Find(std::string(config).append("Binary"), binary);
Cost = _config->FindI(std::string(config).append("Cost"), cost);
std::string const compConf = std::string(config).append("CompressArg");
if (_config->Exists(compConf) == true)
CompressArgs = _config->FindVector(compConf);
else if (compressArg != NULL)
CompressArgs.push_back(compressArg);
std::string const uncompConf = std::string(config).append("UncompressArg");
if (_config->Exists(uncompConf) == true)
UncompressArgs = _config->FindVector(uncompConf);
else if (uncompressArg != NULL)
UncompressArgs.push_back(uncompressArg);
}
/*}}}*/
}