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/*
* meta.cc - Implementation of the Key classes for system metadata
* libhscript, the HorizonScript library for
* Project Horizon
*
* Copyright (c) 2019 Adélie Linux and contributors. All rights reserved.
* This code is licensed under the AGPL 3.0 license, as noted in the
* LICENSE-code file in the root directory of this repository.
*
* SPDX-License-Identifier: AGPL-3.0-only
*/
#include <fstream>
#include <regex>
#include <unistd.h>
#include "meta.hh"
#include "util/output.hh"
using namespace Horizon::Keys;
Key *Hostname::parseFromData(const std::string &data, int lineno, int *errors,
int *) {
std::regex valid_re("[A-Za-z0-9-_.]*");
if(!std::regex_match(data, valid_re)) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"hostname: expected machine or DNS name",
"'" + data + "' is not a valid hostname");
return nullptr;
}
return new Hostname(lineno, data);
}
bool Hostname::validate(ScriptOptions) const {
/* Validate that the name is a valid machine or DNS name */
bool any_failure = false;
std::string::size_type last_dot = 0, next_dot = 0;
if(!isalpha(this->_value[0])) {
any_failure = true;
output_error("installfile:" + std::to_string(this->lineno()),
"hostname: must start with alphabetical character");
}
if(this->_value.size() > 320) {
any_failure = true;
output_error("installfile:" + std::to_string(this->lineno()),
"hostname: value too long",
"valid host names must be less than 320 characters");
}
do {
next_dot = this->_value.find_first_of('.', next_dot + 1);
if(next_dot == std::string::npos) {
next_dot = this->_value.size();
}
if(next_dot - last_dot > 64) {
any_failure = true;
output_error("installfile:" + std::to_string(this->lineno()),
"hostname: component too long",
"each component must be less than 64 characters");
}
last_dot = next_dot;
} while(next_dot != this->_value.size());
return !any_failure;
}
bool Hostname::execute(ScriptOptions opts) const {
/* Set the hostname of the target computer */
std::string actual;
std::string::size_type dot = this->_value.find_first_of('.');
if(this->_value.size() > 64) {
/* Linux has a nodename limit of 64 characters.
* That's fine, because we have a limit of 64 chars per segment.
* Assuming a dot is present, just chop at the first dot. */
if(dot == std::string::npos || dot >= 64) {
output_error("installfile:" + std::to_string(this->lineno()),
"hostname: nodename too long",
"Linux requires nodename to be <= 64 characters.");
return false;
}
actual = this->_value.substr(0, dot);
} else {
actual = this->_value;
}
/* Runner.Execute.hostname. */
if(opts.test(Simulate)) {
output_info("installfile:" + std::to_string(this->lineno()),
"hostname: set hostname to '" + actual + "'");
std::cout << "hostname " << actual << std::endl;
} else {
if(sethostname(actual.c_str(), actual.size()) == -1) {
output_error("installfile:" + std::to_string(this->lineno()),
"hostname: failed to set host name",
std::string(strerror(errno)));
return false;
}
}
/* Runner.Execute.hostname.Write. */
if(opts.test(Simulate)) {
output_info("installfile:" + std::to_string(this->lineno()),
"hostname: write '" + actual + "' to /etc/hostname");
std::cout << "printf '%s' " << actual << " > /target/etc/hostname"
<< std::endl;
} else {
std::ofstream hostname_f("/target/etc/hostname");
if(!hostname_f) {
output_error("installfile:" + std::to_string(this->lineno()),
"hostname: could not open /etc/hostname for writing");
return false;
}
hostname_f << actual;
}
return true;
}
Key *PkgInstall::parseFromData(const std::string &data, int lineno, int *errors,
int *warnings) {
std::regex valid_pkg("[0-9A-Za-z+_.-]*((>?<|[<>]?=|[~>])[0-9A-Za-z-_.]+)?");
std::string next_pkg;
std::istringstream stream(data);
std::set<std::string> all_pkgs;
while(stream >> next_pkg) {
if(!std::regex_match(next_pkg, valid_pkg)) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"pkginstall: expected package name",
"'" + next_pkg + "' is not a valid package or atom");
return nullptr;
}
if(all_pkgs.find(next_pkg) != all_pkgs.end()) {
if(warnings) *warnings += 1;
output_warning("installfile:" + std::to_string(lineno),
"pkginstall: package '" + next_pkg +
"' is already in the target package set");
continue;
}
all_pkgs.insert(next_pkg);
}
return new PkgInstall(lineno, all_pkgs);
}
Key *Repository::parseFromData(const std::string &data, int lineno, int *errors,
int *) {
if(data.empty() || (data[0] != '/' && data.compare(0, 4, "http"))) {
if(errors) *errors += 1;
output_error("installfile:" + std::to_string(lineno),
"repository: must be absolute path or HTTP(S) URL");
return nullptr;
}
return new Repository(lineno, data);
}
bool Repository::validate(ScriptOptions) const {
/* TODO XXX: Ensure URL is accessible if networking is available */
return true;
}
bool Repository::execute(ScriptOptions opts) const {
/* Runner.Execute.repository. */
if(opts.test(Simulate)) {
output_info("installfile:" + std::to_string(this->lineno()),
"repository: write '" + this->value() +
"' to /etc/apk/repositories");
std::cout << "echo '" << this->value() <<
"' >> /target/etc/apk/repositories" << std::endl;
} else {
std::ofstream repo_f("/target/etc/apk/repositories",
std::ios_base::ate);
if(!repo_f) {
output_error("installfile:" + std::to_string(this->lineno()),
"repository: could not open /etc/apk/repositories "
"for writing");
return false;
}
repo_f << this->value() << std::endl;
}
return true;
}
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