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/* $OpenBSD: execpromise.c,v 1.2 2021/12/13 18:04:28 deraadt Exp $ */
/*
* Copyright (c) 2017 Florian Obser <florian@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int
main(int argc, char **argv)
{
int ch, child = 0, s;
char **oargv = argv;
while ((ch = getopt(argc, argv, "C")) != -1) {
switch (ch) {
case 'C':
child = 1;
break;
default:
errx(1, "");
}
}
argc -= optind;
argv += optind;
if (child ==1) {
warnx("child");
if (argc > 1)
errx(1, "argc: %d", argc);
if (argc == 1) {
warnx("plege(\"%s\",\"\")", argv[0]);
if (pledge(argv[0], "") == -1)
err(24, "child pledge");
}
warnx("trying to open socket");
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s == -1)
err(23, "open");
else
warnx("opened socket");
close(s);
exit(0);
} else {
warnx("parent");
if (argc == 2)
warnx("execpromise: \"%s\", child pledge: \"%s\"",
argv[0], argv[1]);
else if (argc == 1)
warnx("execpromise: \"%s\"", argv[0]);
else
errx(1, "argc out of range");
if (pledge("stdio exec", argv[0]) == -1)
err(1, "parent pledge");
oargv[1] = "-C";
execvp(oargv[0], &oargv[0]);
err((errno == ENOENT) ? 127 : 126, "%s", argv[0]);
}
}
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