1*d4514f0bSApple OSS Distributions #include <stdio.h>
2*d4514f0bSApple OSS Distributions #include <stdlib.h>
3*d4514f0bSApple OSS Distributions
4*d4514f0bSApple OSS Distributions #include <sys/types.h>
5*d4514f0bSApple OSS Distributions #include <sys/uio.h>
6*d4514f0bSApple OSS Distributions #include <unistd.h>
7*d4514f0bSApple OSS Distributions
8*d4514f0bSApple OSS Distributions #include <darwintest.h>
9*d4514f0bSApple OSS Distributions
10*d4514f0bSApple OSS Distributions static void
too_long(int ignored)11*d4514f0bSApple OSS Distributions too_long(int ignored)
12*d4514f0bSApple OSS Distributions {
13*d4514f0bSApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*d4514f0bSApple OSS Distributions }
15*d4514f0bSApple OSS Distributions
16*d4514f0bSApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*d4514f0bSApple OSS Distributions {
18*d4514f0bSApple OSS Distributions int p[2];
19*d4514f0bSApple OSS Distributions char c = 0;
20*d4514f0bSApple OSS Distributions struct iovec iov = {
21*d4514f0bSApple OSS Distributions .iov_base = &c,
22*d4514f0bSApple OSS Distributions .iov_len = 0x100000000UL
23*d4514f0bSApple OSS Distributions };
24*d4514f0bSApple OSS Distributions pid_t child;
25*d4514f0bSApple OSS Distributions int status = 0;
26*d4514f0bSApple OSS Distributions
27*d4514f0bSApple OSS Distributions T_SETUPBEGIN;
28*d4514f0bSApple OSS Distributions /* create a pipe with some data in it: */
29*d4514f0bSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*d4514f0bSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*d4514f0bSApple OSS Distributions T_SETUPEND;
32*d4514f0bSApple OSS Distributions
33*d4514f0bSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*d4514f0bSApple OSS Distributions
35*d4514f0bSApple OSS Distributions if (!child) {
36*d4514f0bSApple OSS Distributions readv(p[0], &iov, 1);
37*d4514f0bSApple OSS Distributions exit(0);
38*d4514f0bSApple OSS Distributions }
39*d4514f0bSApple OSS Distributions
40*d4514f0bSApple OSS Distributions /*
41*d4514f0bSApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*d4514f0bSApple OSS Distributions * infinite loop, so fail via too_long.
43*d4514f0bSApple OSS Distributions */
44*d4514f0bSApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*d4514f0bSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*d4514f0bSApple OSS Distributions
47*d4514f0bSApple OSS Distributions /* this will hang if the bug is there: */
48*d4514f0bSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*d4514f0bSApple OSS Distributions
50*d4514f0bSApple OSS Distributions /* expecting a clean, zero exit: */
51*d4514f0bSApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*d4514f0bSApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*d4514f0bSApple OSS Distributions }
54