1*42e22086SApple OSS Distributions #include <stdio.h>
2*42e22086SApple OSS Distributions #include <stdlib.h>
3*42e22086SApple OSS Distributions
4*42e22086SApple OSS Distributions #include <sys/types.h>
5*42e22086SApple OSS Distributions #include <sys/uio.h>
6*42e22086SApple OSS Distributions #include <unistd.h>
7*42e22086SApple OSS Distributions
8*42e22086SApple OSS Distributions #include <darwintest.h>
9*42e22086SApple OSS Distributions
10*42e22086SApple OSS Distributions static void
too_long(int ignored)11*42e22086SApple OSS Distributions too_long(int ignored)
12*42e22086SApple OSS Distributions {
13*42e22086SApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*42e22086SApple OSS Distributions }
15*42e22086SApple OSS Distributions
16*42e22086SApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*42e22086SApple OSS Distributions {
18*42e22086SApple OSS Distributions int p[2];
19*42e22086SApple OSS Distributions char c = 0;
20*42e22086SApple OSS Distributions struct iovec iov = {
21*42e22086SApple OSS Distributions .iov_base = &c,
22*42e22086SApple OSS Distributions .iov_len = 0x100000000UL
23*42e22086SApple OSS Distributions };
24*42e22086SApple OSS Distributions pid_t child;
25*42e22086SApple OSS Distributions int status = 0;
26*42e22086SApple OSS Distributions
27*42e22086SApple OSS Distributions T_SETUPBEGIN;
28*42e22086SApple OSS Distributions /* create a pipe with some data in it: */
29*42e22086SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*42e22086SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*42e22086SApple OSS Distributions T_SETUPEND;
32*42e22086SApple OSS Distributions
33*42e22086SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*42e22086SApple OSS Distributions
35*42e22086SApple OSS Distributions if (!child) {
36*42e22086SApple OSS Distributions readv(p[0], &iov, 1);
37*42e22086SApple OSS Distributions exit(0);
38*42e22086SApple OSS Distributions }
39*42e22086SApple OSS Distributions
40*42e22086SApple OSS Distributions /*
41*42e22086SApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*42e22086SApple OSS Distributions * infinite loop, so fail via too_long.
43*42e22086SApple OSS Distributions */
44*42e22086SApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*42e22086SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*42e22086SApple OSS Distributions
47*42e22086SApple OSS Distributions /* this will hang if the bug is there: */
48*42e22086SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*42e22086SApple OSS Distributions
50*42e22086SApple OSS Distributions /* expecting a clean, zero exit: */
51*42e22086SApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*42e22086SApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*42e22086SApple OSS Distributions }
54