ladybird/Userland/Utilities/env.cpp
2023-06-26 19:27:45 +02:00

84 lines
2.5 KiB
C++

/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <stdlib.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath exec"));
bool ignore_env = false;
StringView split_string {};
Vector<DeprecatedString> values_to_set;
Vector<DeprecatedString> values_to_unset;
Core::ArgsParser args_parser;
args_parser.set_stop_on_first_non_option(true);
args_parser.add_option(ignore_env, "Start with an empty environment", "ignore-environment", 'i');
args_parser.add_option(split_string, "Process and split S into separate arguments; used to pass multiple arguments on shebang lines", "split-string", 'S', "S");
args_parser.add_option(Core::ArgsParser::Option {
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
.help_string = "Remove variable from the environment",
.long_name = "unset",
.short_name = 'u',
.value_name = "name",
.accept_value = [&values_to_unset](StringView value) {
values_to_unset.append(value);
return true;
},
});
args_parser.add_positional_argument(values_to_set, "Environment and commands", "env/command", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
if (ignore_env) {
clearenv();
} else {
for (auto const& value : values_to_unset) {
if (unsetenv(value.characters()) < 0) {
warnln("env: cannot unset '{}': {}", value, strerror(errno));
return 1;
}
}
}
size_t argv_start;
for (argv_start = 0; argv_start < values_to_set.size(); ++argv_start) {
if (values_to_set[argv_start].contains('=')) {
putenv(const_cast<char*>(values_to_set[argv_start].characters()));
} else {
break;
}
}
Vector<StringView> new_argv;
if (!split_string.is_empty()) {
for (auto view : split_string.split_view(' ')) {
new_argv.append(view);
}
}
for (size_t i = argv_start; i < values_to_set.size(); ++i) {
new_argv.append(values_to_set[i]);
}
if (new_argv.size() == 0) {
for (auto entry = environ; *entry != nullptr; ++entry)
outln("{}", *entry);
return 0;
}
TRY(Core::System::exec(new_argv[0], new_argv, Core::System::SearchInPath::Yes));
return 1;
}