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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* #####################################################################
apt-helper - cmdline helpers
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include <apt-pkg/acquire-item.h>
#include <apt-pkg/acquire.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/init.h>
#include <apt-pkg/pkgsystem.h>
#include <apt-pkg/proxy.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/srvrec.h>
#include <apt-private/acqprogress.h>
#include <apt-private/private-cmndline.h>
#include <apt-private/private-download.h>
#include <apt-private/private-main.h>
#include <apt-private/private-output.h>
#include <iostream>
#include <string>
#include <vector>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <apti18n.h>
/*}}}*/
static bool DoAutoDetectProxy(CommandLine &CmdL) /*{{{*/
{
if (CmdL.FileSize() != 2)
return _error->Error(_("Need one URL as argument"));
URI ServerURL(CmdL.FileList[1]);
if (AutoDetectProxy(ServerURL) == false)
return false;
std::string SpecificProxy = _config->Find("Acquire::"+ServerURL.Access+"::Proxy::" + ServerURL.Host);
ioprintf(std::cout, "Using proxy '%s' for URL '%s'\n",
SpecificProxy.c_str(), std::string(ServerURL).c_str());
return true;
}
/*}}}*/
static bool DoDownloadFile(CommandLine &CmdL) /*{{{*/
{
if (CmdL.FileSize() <= 2)
return _error->Error(_("Must specify at least one pair url/filename"));
aptAcquireWithTextStatus Fetcher;
size_t fileind = 0;
std::vector<std::string> targetfiles;
while (fileind + 2 <= CmdL.FileSize())
{
std::string download_uri = CmdL.FileList[fileind + 1];
std::string targetfile = CmdL.FileList[fileind + 2];
HashStringList hashes;
fileind += 2;
// An empty string counts as a hash for compatability reasons
if (CmdL.FileSize() > fileind + 1 && *CmdL.FileList[fileind + 1] == '\0')
fileind++;
/* Let's start looking for hashes */
for (auto i = fileind + 1; CmdL.FileSize() > i; i++)
{
bool isAHash = false;
for (auto HashP = HashString::SupportedHashes(); *HashP != nullptr; HashP++)
{
if (APT::String::Startswith(CmdL.FileList[i], *HashP))
isAHash = true;
}
if (!isAHash)
break;
hashes.push_back(HashString(CmdL.FileList[i]));
fileind++;
}
// we use download_uri as descr and targetfile as short-descr
new pkgAcqFile(&Fetcher, download_uri, hashes, 0, download_uri, targetfile,
"dest-dir-ignored", targetfile);
targetfiles.push_back(targetfile);
}
bool Failed = false;
if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
return _error->Error(_("Download Failed"));
if (targetfiles.empty() == false)
for (std::vector<std::string>::const_iterator f = targetfiles.begin(); f != targetfiles.end(); ++f)
if (FileExists(*f) == false)
return _error->Error(_("Download Failed"));
return true;
}
/*}}}*/
static bool DoSrvLookup(CommandLine &CmdL) /*{{{*/
{
if (CmdL.FileSize() <= 1)
return _error->Error("Must specify at least one SRV record");
for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
{
std::vector<SrvRec> srv_records;
std::string const name = CmdL.FileList[i];
c0out << "# Target\tPriority\tWeight\tPort # for " << name << std::endl;
size_t const found = name.find(":");
if (found != std::string::npos)
{
std::string const host = name.substr(0, found);
size_t const port = atoi(name.c_str() + found + 1);
if(GetSrvRecords(host, port, srv_records) == false)
_error->Error(_("GetSrvRec failed for %s"), name.c_str());
}
else if(GetSrvRecords(name, srv_records) == false)
_error->Error(_("GetSrvRec failed for %s"), name.c_str());
for (SrvRec const &I : srv_records)
ioprintf(c1out, "%s\t%d\t%d\t%d\n", I.target.c_str(), I.priority, I.weight, I.port);
}
return true;
}
/*}}}*/
static const APT::Configuration::Compressor *FindCompressor(std::vector<APT::Configuration::Compressor> const &compressors, std::string const &name) /*{{{*/
{
APT::Configuration::Compressor const * compressor = NULL;
for (auto const & c : compressors)
{
if (compressor != NULL && c.Cost >= compressor->Cost)
continue;
if (c.Name == name || c.Extension == name || (!c.Extension.empty() && c.Extension.substr(1) == name))
compressor = &c;
}
return compressor;
}
/*}}}*/
static bool DoCatFile(CommandLine &CmdL) /*{{{*/
{
FileFd fd;
FileFd out;
std::string const compressorName = _config->Find("Apt-Helper::Cat-File::Compress", "");
if (compressorName.empty() == false)
{
auto const compressors = APT::Configuration::getCompressors();
auto const compressor = FindCompressor(compressors, compressorName);
if (compressor == NULL)
return _error->Error("Could not find compressor: %s", compressorName.c_str());
if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, *compressor) == false)
return false;
} else
{
if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly) == false)
return false;
}
if (CmdL.FileSize() <= 1)
{
if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
return false;
if (CopyFile(fd, out) == false)
return false;
return true;
}
for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
{
std::string const name = CmdL.FileList[i];
if (name != "-")
{
if (fd.Open(name, FileFd::ReadOnly, FileFd::Extension) == false)
return false;
}
else
{
if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
return false;
}
if (CopyFile(fd, out) == false)
return false;
}
return true;
}
/*}}}*/
static pid_t ExecuteProcess(const char *Args[]) /*{{{*/
{
pid_t pid = ExecFork();
if (pid == 0)
{
execvp(Args[0], (char **)Args);
_exit(100);
}
return pid;
}
static bool ServiceIsActive(const char *service)
{
const char *argv[] = {"systemctl", "is-active", "-q", service, nullptr};
pid_t pid = ExecuteProcess(argv);
return ExecWait(pid, "systemctl is-active", true);
}
static bool DoWaitOnline(CommandLine &)
{
// Also add services to After= in .service
static const char *WaitingTasks[][6] = {
{"systemd-networkd.service", "/lib/systemd/systemd-networkd-wait-online", "-q", "--timeout=30", nullptr},
{"NetworkManager.service", "nm-online", "-q", "--timeout", "30", nullptr},
{"connman.service", "connmand-wait-online", "--timeout=30", nullptr},
};
for (const char **task : WaitingTasks)
{
if (ServiceIsActive(task[0]))
{
pid_t pid = ExecuteProcess(task + 1);
ExecWait(pid, task[1]);
}
}
return _error->PendingError() == false;
}
/*}}}*/
static bool DropPrivsAndRun(CommandLine &CmdL) /*{{{*/
{
if (CmdL.FileSize() < 2)
return _error->Error("No command given to run without privileges");
if (DropPrivileges() == false)
return _error->Error("Dropping Privileges failed, not executing '%s'", CmdL.FileList[1]);
std::vector<char const *> Args;
Args.reserve(CmdL.FileSize() + 1);
for (auto a = CmdL.FileList + 1; *a != nullptr; ++a)
Args.push_back(*a);
Args.push_back(nullptr);
auto const pid = ExecuteProcess(Args.data());
return ExecWait(pid, CmdL.FileList[1]);
}
/*}}}*/
static bool ShowHelp(CommandLine &) /*{{{*/
{
std::cout <<
_("Usage: apt-helper [options] command\n"
" apt-helper [options] cat-file file ...\n"
" apt-helper [options] download-file uri target-path\n"
"\n"
"apt-helper bundles a variety of commands for shell scripts to use\n"
"e.g. the same proxy configuration or acquire system as APT would.\n");
return true;
}
/*}}}*/
static std::vector<aptDispatchWithHelp> GetCommands() /*{{{*/
{
return {
{"download-file", &DoDownloadFile, _("download the given uri to the target-path")},
{"srv-lookup", &DoSrvLookup, _("lookup a SRV record (e.g. _http._tcp.ftp.debian.org)")},
{"cat-file", &DoCatFile, _("concatenate files, with automatic decompression")},
{"auto-detect-proxy", &DoAutoDetectProxy, _("detect proxy using apt.conf")},
{"wait-online", &DoWaitOnline, _("wait for system to be online")},
{"drop-privs", &DropPrivsAndRun, _("drop privileges before running given command")},
{nullptr, nullptr, nullptr}};
}
/*}}}*/
int main(int argc,const char *argv[]) /*{{{*/
{
CommandLine CmdL;
auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_HELPER, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
InitOutput();
return DispatchCommandLine(CmdL, Cmds);
}
/*}}}*/
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