- (djm) [openbsd-compat/port-linux.c] Check whether SELinux is enabled
[openssh-git.git] / openbsd-compat / regress / closefromtest.c
blob145b09d7b7b021f6d863eadfb6dfb0627388ca39
1 /*
2 * Copyright (c) 2006 Darren Tucker
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
18 #include <sys/stat.h>
20 #include <fcntl.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <unistd.h>
25 #define NUM_OPENS 10
27 void
28 fail(char *msg)
30 fprintf(stderr, "closefrom: %s\n", msg);
31 exit(1);
34 int
35 main(void)
37 int i, max, fds[NUM_OPENS];
38 char buf[512];
40 for (i = 0; i < NUM_OPENS; i++)
41 if ((fds[i] = open("/dev/null", O_RDONLY)) == -1)
42 exit(0); /* can't test */
43 max = i - 1;
45 /* should close last fd only */
46 closefrom(fds[max]);
47 if (close(fds[max]) != -1)
48 fail("failed to close highest fd");
50 /* make sure we can still use remaining descriptors */
51 for (i = 0; i < max; i++)
52 if (read(fds[i], buf, sizeof(buf)) == -1)
53 fail("closed descriptors it should not have");
55 /* should close all fds */
56 closefrom(fds[0]);
57 for (i = 0; i < NUM_OPENS; i++)
58 if (close(fds[i]) != -1)
59 fail("failed to close from lowest fd");
60 return 0;