1*aca3beaaSApple OSS Distributions #include <stdio.h>
2*aca3beaaSApple OSS Distributions #include <stdlib.h>
3*aca3beaaSApple OSS Distributions
4*aca3beaaSApple OSS Distributions #include <sys/types.h>
5*aca3beaaSApple OSS Distributions #include <sys/uio.h>
6*aca3beaaSApple OSS Distributions #include <unistd.h>
7*aca3beaaSApple OSS Distributions
8*aca3beaaSApple OSS Distributions #include <darwintest.h>
9*aca3beaaSApple OSS Distributions
10*aca3beaaSApple OSS Distributions static void
too_long(int ignored)11*aca3beaaSApple OSS Distributions too_long(int ignored)
12*aca3beaaSApple OSS Distributions {
13*aca3beaaSApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*aca3beaaSApple OSS Distributions }
15*aca3beaaSApple OSS Distributions
16*aca3beaaSApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*aca3beaaSApple OSS Distributions {
18*aca3beaaSApple OSS Distributions int p[2];
19*aca3beaaSApple OSS Distributions char c = 0;
20*aca3beaaSApple OSS Distributions struct iovec iov = {
21*aca3beaaSApple OSS Distributions .iov_base = &c,
22*aca3beaaSApple OSS Distributions .iov_len = 0x100000000UL
23*aca3beaaSApple OSS Distributions };
24*aca3beaaSApple OSS Distributions pid_t child;
25*aca3beaaSApple OSS Distributions int status = 0;
26*aca3beaaSApple OSS Distributions
27*aca3beaaSApple OSS Distributions T_SETUPBEGIN;
28*aca3beaaSApple OSS Distributions /* create a pipe with some data in it: */
29*aca3beaaSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*aca3beaaSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*aca3beaaSApple OSS Distributions T_SETUPEND;
32*aca3beaaSApple OSS Distributions
33*aca3beaaSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*aca3beaaSApple OSS Distributions
35*aca3beaaSApple OSS Distributions if (!child) {
36*aca3beaaSApple OSS Distributions readv(p[0], &iov, 1);
37*aca3beaaSApple OSS Distributions exit(0);
38*aca3beaaSApple OSS Distributions }
39*aca3beaaSApple OSS Distributions
40*aca3beaaSApple OSS Distributions /*
41*aca3beaaSApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*aca3beaaSApple OSS Distributions * infinite loop, so fail via too_long.
43*aca3beaaSApple OSS Distributions */
44*aca3beaaSApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*aca3beaaSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*aca3beaaSApple OSS Distributions
47*aca3beaaSApple OSS Distributions /* this will hang if the bug is there: */
48*aca3beaaSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*aca3beaaSApple OSS Distributions
50*aca3beaaSApple OSS Distributions /* expecting a clean, zero exit: */
51*aca3beaaSApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*aca3beaaSApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*aca3beaaSApple OSS Distributions }
54