1*84d4cbe5Sbluhm /* $OpenBSD: dup3.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 <unistd.h>
21*84d4cbe5Sbluhm
22*84d4cbe5Sbluhm #include "header.h"
23*84d4cbe5Sbluhm
24*84d4cbe5Sbluhm void
fdops(int fdpre,int fdpost)25*84d4cbe5Sbluhm fdops(int fdpre, int fdpost)
26*84d4cbe5Sbluhm {
27*84d4cbe5Sbluhm if (dup3(fdpre, 5, O_CLOEXEC) == -1)
28*84d4cbe5Sbluhm err(1, "dup3 pre");
29*84d4cbe5Sbluhm if (dup3(fdpost, 6, O_CLOEXEC) == -1)
30*84d4cbe5Sbluhm err(1, "dup3 post");
31*84d4cbe5Sbluhm if (dup3(fdpre, 7, O_CLOEXEC) == -1)
32*84d4cbe5Sbluhm err(1, "dup3 pepare post overwite");
33*84d4cbe5Sbluhm if (dup3(fdpost, 7, O_CLOEXEC) == -1)
34*84d4cbe5Sbluhm err(1, "dup3 post overwrite");
35*84d4cbe5Sbluhm if (dup3(fdpost, 8, O_CLOEXEC) == -1)
36*84d4cbe5Sbluhm err(1, "dup3 pepare pre overwrite");
37*84d4cbe5Sbluhm if (dup3(fdpre, 8, O_CLOEXEC) == -1)
38*84d4cbe5Sbluhm err(1, "dup3 pre overwite");
39*84d4cbe5Sbluhm if (dup3(fdpre, 9, 0) == -1)
40*84d4cbe5Sbluhm err(1, "dup3 pepare pre equal");
41*84d4cbe5Sbluhm if (dup3(9, 9, O_CLOEXEC) != -1)
42*84d4cbe5Sbluhm errx(1, "dup3 pre equal succeeded");
43*84d4cbe5Sbluhm if (dup3(fdpost, 10, 0) == -1)
44*84d4cbe5Sbluhm err(1, "dup3 pepare post equal");
45*84d4cbe5Sbluhm if (dup3(10, 10, O_CLOEXEC) != -1)
46*84d4cbe5Sbluhm errx(1, "dup3 post equal succeeded");
47*84d4cbe5Sbluhm }
48