1*0f4c859eSApple OSS Distributions #include <stdio.h>
2*0f4c859eSApple OSS Distributions #include <stdlib.h>
3*0f4c859eSApple OSS Distributions
4*0f4c859eSApple OSS Distributions #include <sys/types.h>
5*0f4c859eSApple OSS Distributions #include <sys/uio.h>
6*0f4c859eSApple OSS Distributions #include <unistd.h>
7*0f4c859eSApple OSS Distributions
8*0f4c859eSApple OSS Distributions #include <darwintest.h>
9*0f4c859eSApple OSS Distributions
10*0f4c859eSApple OSS Distributions static void
too_long(int ignored)11*0f4c859eSApple OSS Distributions too_long(int ignored)
12*0f4c859eSApple OSS Distributions {
13*0f4c859eSApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*0f4c859eSApple OSS Distributions }
15*0f4c859eSApple OSS Distributions
16*0f4c859eSApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*0f4c859eSApple OSS Distributions {
18*0f4c859eSApple OSS Distributions int p[2];
19*0f4c859eSApple OSS Distributions char c = 0;
20*0f4c859eSApple OSS Distributions struct iovec iov = {
21*0f4c859eSApple OSS Distributions .iov_base = &c,
22*0f4c859eSApple OSS Distributions .iov_len = 0x100000000UL
23*0f4c859eSApple OSS Distributions };
24*0f4c859eSApple OSS Distributions pid_t child;
25*0f4c859eSApple OSS Distributions int status = 0;
26*0f4c859eSApple OSS Distributions
27*0f4c859eSApple OSS Distributions T_SETUPBEGIN;
28*0f4c859eSApple OSS Distributions /* create a pipe with some data in it: */
29*0f4c859eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*0f4c859eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*0f4c859eSApple OSS Distributions T_SETUPEND;
32*0f4c859eSApple OSS Distributions
33*0f4c859eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*0f4c859eSApple OSS Distributions
35*0f4c859eSApple OSS Distributions if (!child) {
36*0f4c859eSApple OSS Distributions readv(p[0], &iov, 1);
37*0f4c859eSApple OSS Distributions exit(0);
38*0f4c859eSApple OSS Distributions }
39*0f4c859eSApple OSS Distributions
40*0f4c859eSApple OSS Distributions /*
41*0f4c859eSApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*0f4c859eSApple OSS Distributions * infinite loop, so fail via too_long.
43*0f4c859eSApple OSS Distributions */
44*0f4c859eSApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*0f4c859eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*0f4c859eSApple OSS Distributions
47*0f4c859eSApple OSS Distributions /* this will hang if the bug is there: */
48*0f4c859eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*0f4c859eSApple OSS Distributions
50*0f4c859eSApple OSS Distributions /* expecting a clean, zero exit: */
51*0f4c859eSApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*0f4c859eSApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*0f4c859eSApple OSS Distributions }
54