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Userland: Move command-line utilities to Userland/Utilities/
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142 changed files with 58 additions and 58 deletions
100
Userland/Utilities/uniq.cpp
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100
Userland/Utilities/uniq.cpp
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/*
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* Copyright (c) 2020, Matthew L. Curry <matthew.curry@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/RefPtr.h>
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#include <LibCore/ArgsParser.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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struct linebuf {
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char* buf = NULL;
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size_t len = 0;
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};
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static FILE* get_stream(const char* filepath, const char* perms)
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{
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FILE* ret;
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if (filepath == nullptr) {
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if (perms[0] == 'r')
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return stdin;
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return stdout;
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}
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ret = fopen(filepath, perms);
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if (ret == nullptr) {
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perror("fopen");
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exit(1);
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}
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return ret;
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}
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath wpath cpath", nullptr) > 0) {
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perror("pledge");
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return 1;
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}
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const char* inpath = nullptr;
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const char* outpath = nullptr;
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Core::ArgsParser args_parser;
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args_parser.add_positional_argument(inpath, "Input file", "input", Core::ArgsParser::Required::No);
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args_parser.add_positional_argument(outpath, "Output file", "output", Core::ArgsParser::Required::No);
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args_parser.parse(argc, argv);
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FILE* infile = get_stream(inpath, "r");
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FILE* outfile = get_stream(outpath, "w");
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struct linebuf buffers[2];
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struct linebuf* previous = &(buffers[0]);
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struct linebuf* current = &(buffers[1]);
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bool first_run = true;
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for (;;) {
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errno = 0;
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ssize_t rc = getline(&(current->buf), &(current->len), infile);
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if (rc < 0 && errno != 0) {
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perror("getline");
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exit(1);
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}
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if (rc < 0)
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break;
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if (!first_run && strcmp(current->buf, previous->buf) == 0)
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continue;
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fputs(current->buf, outfile);
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AK::swap(current, previous);
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first_run = false;
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}
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fclose(infile);
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fclose(outfile);
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return 0;
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}
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