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Userland: Add readlink(1)

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Sergey Bugaev 2020-06-16 22:03:19 +03:00 committed by Andreas Kling
parent 363b7351b8
commit b6a4c450d1
Notes: sideshowbarker 2024-07-19 05:36:37 +09:00 
Author: https://github.com/bugaevc
Commit: https://github.com/SerenityOS/serenity/commit/b6a4c450d17
Pull-request: https://github.com/SerenityOS/serenity/pull/2564
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/awesomekling
1 changed files with 58 additions and 0 deletions
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Userland/readlink.cpp Normal file
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/*
* Copyright (c) 2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <stdio.h>
int main(int argc, char** argv)
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
bool no_newline = false;
Vector<const char*> paths;
Core::ArgsParser args_parser;
args_parser.add_option(no_newline, "Do not append a newline", "no-newline", 'n');
args_parser.add_positional_argument(paths, "Symlink path", "path");
args_parser.parse(argc, argv);
for (const char* path : paths) {
auto destination = Core::File::read_link(path);
if (destination.is_null()) {
perror(path);
return 1;
}
printf("%s", destination.characters());
if (!no_newline)
putchar('\n');
}
return 0;
}