1*4d495c6eSApple OSS Distributions #include <stdio.h>
2*4d495c6eSApple OSS Distributions #include <stdlib.h>
3*4d495c6eSApple OSS Distributions
4*4d495c6eSApple OSS Distributions #include <sys/types.h>
5*4d495c6eSApple OSS Distributions #include <sys/uio.h>
6*4d495c6eSApple OSS Distributions #include <unistd.h>
7*4d495c6eSApple OSS Distributions
8*4d495c6eSApple OSS Distributions #include <darwintest.h>
9*4d495c6eSApple OSS Distributions
10*4d495c6eSApple OSS Distributions static void
too_long(int ignored)11*4d495c6eSApple OSS Distributions too_long(int ignored)
12*4d495c6eSApple OSS Distributions {
13*4d495c6eSApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*4d495c6eSApple OSS Distributions }
15*4d495c6eSApple OSS Distributions
16*4d495c6eSApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*4d495c6eSApple OSS Distributions {
18*4d495c6eSApple OSS Distributions int p[2];
19*4d495c6eSApple OSS Distributions char c = 0;
20*4d495c6eSApple OSS Distributions struct iovec iov = {
21*4d495c6eSApple OSS Distributions .iov_base = &c,
22*4d495c6eSApple OSS Distributions .iov_len = 0x100000000UL
23*4d495c6eSApple OSS Distributions };
24*4d495c6eSApple OSS Distributions pid_t child;
25*4d495c6eSApple OSS Distributions int status = 0;
26*4d495c6eSApple OSS Distributions
27*4d495c6eSApple OSS Distributions T_SETUPBEGIN;
28*4d495c6eSApple OSS Distributions /* create a pipe with some data in it: */
29*4d495c6eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*4d495c6eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*4d495c6eSApple OSS Distributions T_SETUPEND;
32*4d495c6eSApple OSS Distributions
33*4d495c6eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*4d495c6eSApple OSS Distributions
35*4d495c6eSApple OSS Distributions if (!child) {
36*4d495c6eSApple OSS Distributions readv(p[0], &iov, 1);
37*4d495c6eSApple OSS Distributions exit(0);
38*4d495c6eSApple OSS Distributions }
39*4d495c6eSApple OSS Distributions
40*4d495c6eSApple OSS Distributions /*
41*4d495c6eSApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*4d495c6eSApple OSS Distributions * infinite loop, so fail via too_long.
43*4d495c6eSApple OSS Distributions */
44*4d495c6eSApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*4d495c6eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*4d495c6eSApple OSS Distributions
47*4d495c6eSApple OSS Distributions /* this will hang if the bug is there: */
48*4d495c6eSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*4d495c6eSApple OSS Distributions
50*4d495c6eSApple OSS Distributions /* expecting a clean, zero exit: */
51*4d495c6eSApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*4d495c6eSApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*4d495c6eSApple OSS Distributions }
54