coreutils

// orphan.c, version 1.0.1

// OMKOV coreutils orphan

// Copyright (C) 2020, Jakob Wakeling

// MIT Licence

#include "util/error.h"

#include "util/optget.h"

#include <fcntl.h>

#include <unistd.h>

#include <errno.h>

#include <stdio.h>

#define VERSION "1.0.1"

static struct lop lops[] = {

	{ "help",    ARG_NUL, 256 },

	{ "version", ARG_NUL, 257 },

	{ NULL, 0, 0 }

};

static void hlp(void);

static void ver(void);

int main(int ac, char *av[]) { A0 = av[0];

	struct opt opt = OPTGET_INIT; opt.str = ""; opt.lops = lops;

	for (int o; (o = optget(&opt, av, 0)) != -1;) switch (o) {

	case 256: { hlp(); return 0; }

	case 257: { ver(); return 0; }

	default: { return 1; }

	}

	if (opt.ind == ac) { error(1, "missing operand"); }

	switch (fork()) {

	case -1: { error(1, "%s", serr()); }

	case  0: {

		execvp(av[opt.ind], &av[opt.ind]);

		warn("%s: %s", av[opt.ind], serr());

	}

	default: { return 0; }

	}

}

static void hlp(void) {

	puts("orphan - invoke a command as an orphan\n");

	puts("usage: orphan command [argument...]\n");

	puts("options:");

	puts("  --help     Display help information");

	puts("  --version  Display version information");

}

static void ver(void) {

	puts("OMKOV cryptutils orphan, version " VERSION);

	puts("Copyright (C) 2020, Jakob Wakeling");

	puts("MIT Licence (https://opensource.org/licenses/MIT)");

}