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