1*84d4cbe5Sbluhm /* $OpenBSD: main.c,v 1.1.1.1 2018/04/10 23:00:53 bluhm Exp $ */
2*84d4cbe5Sbluhm /*
3*84d4cbe5Sbluhm * Copyright (c) 2018 Alexander Bluhm <bluhm@openbsd.org>
4*84d4cbe5Sbluhm *
5*84d4cbe5Sbluhm * Permission to use, copy, modify, and distribute this software for any
6*84d4cbe5Sbluhm * purpose with or without fee is hereby granted, provided that the above
7*84d4cbe5Sbluhm * copyright notice and this permission notice appear in all copies.
8*84d4cbe5Sbluhm *
9*84d4cbe5Sbluhm * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10*84d4cbe5Sbluhm * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11*84d4cbe5Sbluhm * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12*84d4cbe5Sbluhm * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13*84d4cbe5Sbluhm * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14*84d4cbe5Sbluhm * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15*84d4cbe5Sbluhm * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16*84d4cbe5Sbluhm */
17*84d4cbe5Sbluhm
18*84d4cbe5Sbluhm #include <err.h>
19*84d4cbe5Sbluhm #include <fcntl.h>
20*84d4cbe5Sbluhm #include <stdio.h>
21*84d4cbe5Sbluhm #include <stdlib.h>
22*84d4cbe5Sbluhm #include <unistd.h>
23*84d4cbe5Sbluhm
24*84d4cbe5Sbluhm #include "header.h"
25*84d4cbe5Sbluhm
26*84d4cbe5Sbluhm int
main(int argc,char * argv[])27*84d4cbe5Sbluhm main(int argc, char *argv[])
28*84d4cbe5Sbluhm {
29*84d4cbe5Sbluhm char *cmd;
30*84d4cbe5Sbluhm pid_t self;
31*84d4cbe5Sbluhm int fdpre, fdpost, ret;
32*84d4cbe5Sbluhm
33*84d4cbe5Sbluhm if ((fdpre = open("/dev/null", O_RDONLY)) == -1)
34*84d4cbe5Sbluhm err(1, "open pre");
35*84d4cbe5Sbluhm if (pledge("exec stdio proc recvfd rpath sendfd", NULL) == -1)
36*84d4cbe5Sbluhm err(1, "pledge");
37*84d4cbe5Sbluhm if ((fdpost = open("/dev/null", O_RDONLY)) == -1)
38*84d4cbe5Sbluhm err(1, "open post");
39*84d4cbe5Sbluhm
40*84d4cbe5Sbluhm fdops(fdpre, fdpost);
41*84d4cbe5Sbluhm
42*84d4cbe5Sbluhm self = getpid();
43*84d4cbe5Sbluhm if (asprintf(&cmd, "/usr/bin/fstat -p %d", self) == -1)
44*84d4cbe5Sbluhm err(1, "asprintf");
45*84d4cbe5Sbluhm ret = system(cmd);
46*84d4cbe5Sbluhm switch (ret) {
47*84d4cbe5Sbluhm case -1:
48*84d4cbe5Sbluhm err(1, "system");
49*84d4cbe5Sbluhm case 0:
50*84d4cbe5Sbluhm break;
51*84d4cbe5Sbluhm default:
52*84d4cbe5Sbluhm errx(1, "'%s' failed: %d", cmd, ret);
53*84d4cbe5Sbluhm }
54*84d4cbe5Sbluhm free(cmd);
55*84d4cbe5Sbluhm
56*84d4cbe5Sbluhm return 0;
57*84d4cbe5Sbluhm }
58