1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * Copyright (c) Red Hat Inc., 2007
5 * 12/2007 Copyed from sendfile03.c by Masatake YAMATO
6 */
7
8 /*\
9 * [Description]
10 *
11 * Testcase to test that sendfile(2) system call returns EAGAIN
12 * when passing full out_fd opened with O_NONBLOCK.
13 */
14
15 #include <sys/sendfile.h>
16 #include "tst_test.h"
17
18 #define MAX_FILL_DATA_LENGTH 0xFFFFFFF
19
20 static int p[2];
21 static int in_fd;
22 static int out_fd;
23
setup(void)24 static void setup(void)
25 {
26 int i;
27
28 tst_fill_file("in_file", 'a', 10, 1);
29 in_fd = SAFE_OPEN("in_file", O_RDONLY);
30
31 SAFE_SOCKETPAIR(PF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK, 0, p);
32 out_fd = p[1];
33
34 for (i = 0; i < MAX_FILL_DATA_LENGTH; ++i) {
35 TEST(write(out_fd, "a", 1));
36 if (TST_RET < 0) {
37 if (TST_ERR == EAGAIN)
38 return;
39 else
40 tst_brk(TBROK | TTERRNO, "write(out_fd, buf, 1)");
41 }
42 }
43
44 tst_brk(TBROK, "Failed to get EAGAIN after %i bytes",
45 MAX_FILL_DATA_LENGTH);
46 }
47
cleanup(void)48 static void cleanup(void)
49 {
50 if (p[0])
51 SAFE_CLOSE(p[0]);
52 if (p[1])
53 SAFE_CLOSE(p[1]);
54 SAFE_CLOSE(in_fd);
55 }
56
run(void)57 static void run(void)
58 {
59 TST_EXP_FAIL(sendfile(out_fd, in_fd, NULL, 1), EAGAIN,
60 "sendfile(out_fd, in_fd, NULL, 1) with blocked out_fd");
61 }
62
63 static struct tst_test test = {
64 .needs_tmpdir = 1,
65 .cleanup = cleanup,
66 .setup = setup,
67 .test_all = run,
68 };
69