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Shell: Add option Produce symbolic output to umask

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Its a standard posix option thats always nice to have :^)
This commit is contained in:
Cameron Youell 2023-04-29 01:20:46 +10:00 • committed by Andrew Kaster
parent d9ff37e1b1
commit 978fe3c6d5
1 changed files with 37 additions and 2 deletions
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39
Userland/Shell/Builtin.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2020-2021, the SerenityOS developers.
* Copyright (c) 2020-2023, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -1092,16 +1092,51 @@ ErrorOr<int> Shell::builtin_time(Main::Arguments arguments)
ErrorOr<int> Shell::builtin_umask(Main::Arguments arguments)
{
StringView mask_text;
bool symbolic_output = false;
Core::ArgsParser parser;
parser.add_option(symbolic_output, "Produce symbolic output", "symbolic", 'S');
parser.add_positional_argument(mask_text, "New mask (omit to get current mask)", "octal-mask", Core::ArgsParser::Required::No);
if (!parser.parse(arguments, Core::ArgsParser::FailureBehavior::PrintUsage))
return 1;
auto parse_symbolic_digit = [](int digit) -> ErrorOr<String> {
StringBuilder builder;
if ((digit & 4) == 0)
TRY(builder.try_append('r'));
if ((digit & 2) == 0)
TRY(builder.try_append('w'));
if ((digit & 1) == 0)
TRY(builder.try_append('x'));
if (builder.is_empty())
TRY(builder.try_append('-'));
return builder.to_string();
};
if (mask_text.is_empty()) {
mode_t old_mask = umask(0);
printf("%#o\n", old_mask);
if (symbolic_output) {
StringBuilder builder;
TRY(builder.try_append("u="sv));
TRY(builder.try_append(TRY(parse_symbolic_digit(old_mask >> 6 & 7)).bytes()));
TRY(builder.try_append(",g="sv));
TRY(builder.try_append(TRY(parse_symbolic_digit(old_mask >> 3 & 7)).bytes()));
TRY(builder.try_append(",o="sv));
TRY(builder.try_append(TRY(parse_symbolic_digit(old_mask >> 0 & 7)).bytes()));
outln("{}", builder.string_view());
} else {
outln("{:#o}", old_mask);
}
umask(old_mask);
return 0;
}