`cp`/Makefile: add `cp`.
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#include <fcntl.h>
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#include <pwd.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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#include <unistd.h>
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/*
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BSD 3-Clause License
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Copyright (c) 2021, Ruthenic
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All rights reserved.
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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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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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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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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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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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static int copyFile(const char *src, const char *dst) {
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FILE *sfp, *dfp;
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sfp = fopen(src, "r");
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dfp = fopen(dst, "w");
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if (sfp == NULL) {
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printf("failed to open '%s'. perhaps the path doesn't exist?\n", src);
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exit(1);
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}
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char *contents = NULL;
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char *buf = malloc(2);
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int n = 0;
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while (fgets(buf, 2, sfp) != NULL) {
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fseek(dfp, n, SEEK_SET);
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fwrite(buf, 2, sizeof(buf), dfp);
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n++;
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}
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free(buf);
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fclose(sfp);
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fclose(dfp);
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return 0;
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}
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int main(int argc, char **argv) {
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int isDst = 0;
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char *src;
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char *dst;
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if (argc == 1) {
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printf("no arguments supplied.");
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return -1;
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} else {
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for (int i = 1; i < argc; i++) {
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char *arg = argv[i];
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/*printf(arg);
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printf(" ");*/
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if (!strcmp(arg, "--help")) {
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char *help =
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"Drake's Epic Coreutils (working title) " DRAKECU_VERSION "\n"
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"cp - prints the working user's username (unless --uid is "
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"specified)\n"
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"Available arguments:\n"
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" --help: show this help message\n"
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" --version: show the version of the program\n"
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" --uid: print the users numeric UID, instead of username";
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printf("%s\n", help);
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return 0;
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} else if (!strcmp(arg, "--version")) {
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printf("%s\n", DRAKECU_VERSION);
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return 0;
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} else {
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if (isDst == 0 && strcmp(arg, argv[0])) {
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src = arg;
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isDst = 1;
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} else {
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copyFile(src, arg);
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}
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}
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}
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}
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}
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