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/*
* Copyright (C) 2023 Thomas Weißschuh <thomas@t-8ch.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
int main(int argc, char **argv)
{
int r;
if (argc != 2) {
fprintf(stderr, "invalid options\n");
return EXIT_FAILURE;
}
if (strcmp(argv[1], "fallocate") == 0) {
errno = 0;
r = fallocate(-1, 0, 0, 0);
errx(EXIT_SUCCESS, "fallocate r=%d errno=%s", r, strerror(errno));
} else if (strcmp(argv[1], "exec") == 0) {
char *const cmd[] = {
"/bin/false",
NULL
};
execve(cmd[0], cmd, NULL);
err(EXIT_FAILURE, "exec failed");
} else if (strcmp(argv[1], "ioctl") == 0) {
r = ioctl(0, FIOCLEX);
errx(EXIT_SUCCESS, "ioctl r=%d errno=%s", r, strerror(errno));
}
errx(EXIT_FAILURE, "invalid mode %s", argv[1]);
}
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