1*a1e26a70SApple OSS Distributions #include <stdio.h>
2*a1e26a70SApple OSS Distributions #include <stdlib.h>
3*a1e26a70SApple OSS Distributions
4*a1e26a70SApple OSS Distributions #include <sys/types.h>
5*a1e26a70SApple OSS Distributions #include <sys/uio.h>
6*a1e26a70SApple OSS Distributions #include <unistd.h>
7*a1e26a70SApple OSS Distributions
8*a1e26a70SApple OSS Distributions #include <darwintest.h>
9*a1e26a70SApple OSS Distributions
10*a1e26a70SApple OSS Distributions static void
too_long(int ignored)11*a1e26a70SApple OSS Distributions too_long(int ignored)
12*a1e26a70SApple OSS Distributions {
13*a1e26a70SApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*a1e26a70SApple OSS Distributions }
15*a1e26a70SApple OSS Distributions
16*a1e26a70SApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*a1e26a70SApple OSS Distributions {
18*a1e26a70SApple OSS Distributions int p[2];
19*a1e26a70SApple OSS Distributions char c = 0;
20*a1e26a70SApple OSS Distributions struct iovec iov = {
21*a1e26a70SApple OSS Distributions .iov_base = &c,
22*a1e26a70SApple OSS Distributions .iov_len = 0x100000000UL
23*a1e26a70SApple OSS Distributions };
24*a1e26a70SApple OSS Distributions pid_t child;
25*a1e26a70SApple OSS Distributions int status = 0;
26*a1e26a70SApple OSS Distributions
27*a1e26a70SApple OSS Distributions T_SETUPBEGIN;
28*a1e26a70SApple OSS Distributions /* create a pipe with some data in it: */
29*a1e26a70SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*a1e26a70SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*a1e26a70SApple OSS Distributions T_SETUPEND;
32*a1e26a70SApple OSS Distributions
33*a1e26a70SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*a1e26a70SApple OSS Distributions
35*a1e26a70SApple OSS Distributions if (!child) {
36*a1e26a70SApple OSS Distributions readv(p[0], &iov, 1);
37*a1e26a70SApple OSS Distributions exit(0);
38*a1e26a70SApple OSS Distributions }
39*a1e26a70SApple OSS Distributions
40*a1e26a70SApple OSS Distributions /*
41*a1e26a70SApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*a1e26a70SApple OSS Distributions * infinite loop, so fail via too_long.
43*a1e26a70SApple OSS Distributions */
44*a1e26a70SApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*a1e26a70SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*a1e26a70SApple OSS Distributions
47*a1e26a70SApple OSS Distributions /* this will hang if the bug is there: */
48*a1e26a70SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*a1e26a70SApple OSS Distributions
50*a1e26a70SApple OSS Distributions /* expecting a clean, zero exit: */
51*a1e26a70SApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*a1e26a70SApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*a1e26a70SApple OSS Distributions }
54