1*e3723e1fSApple OSS Distributions #include <stdio.h>
2*e3723e1fSApple OSS Distributions #include <stdlib.h>
3*e3723e1fSApple OSS Distributions
4*e3723e1fSApple OSS Distributions #include <sys/types.h>
5*e3723e1fSApple OSS Distributions #include <sys/uio.h>
6*e3723e1fSApple OSS Distributions #include <unistd.h>
7*e3723e1fSApple OSS Distributions
8*e3723e1fSApple OSS Distributions #include <darwintest.h>
9*e3723e1fSApple OSS Distributions
10*e3723e1fSApple OSS Distributions static void
too_long(int ignored)11*e3723e1fSApple OSS Distributions too_long(int ignored)
12*e3723e1fSApple OSS Distributions {
13*e3723e1fSApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*e3723e1fSApple OSS Distributions }
15*e3723e1fSApple OSS Distributions
16*e3723e1fSApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*e3723e1fSApple OSS Distributions {
18*e3723e1fSApple OSS Distributions int p[2];
19*e3723e1fSApple OSS Distributions char c = 0;
20*e3723e1fSApple OSS Distributions struct iovec iov = {
21*e3723e1fSApple OSS Distributions .iov_base = &c,
22*e3723e1fSApple OSS Distributions .iov_len = 0x100000000UL
23*e3723e1fSApple OSS Distributions };
24*e3723e1fSApple OSS Distributions pid_t child;
25*e3723e1fSApple OSS Distributions int status = 0;
26*e3723e1fSApple OSS Distributions
27*e3723e1fSApple OSS Distributions T_SETUPBEGIN;
28*e3723e1fSApple OSS Distributions /* create a pipe with some data in it: */
29*e3723e1fSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*e3723e1fSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*e3723e1fSApple OSS Distributions T_SETUPEND;
32*e3723e1fSApple OSS Distributions
33*e3723e1fSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*e3723e1fSApple OSS Distributions
35*e3723e1fSApple OSS Distributions if (!child) {
36*e3723e1fSApple OSS Distributions readv(p[0], &iov, 1);
37*e3723e1fSApple OSS Distributions exit(0);
38*e3723e1fSApple OSS Distributions }
39*e3723e1fSApple OSS Distributions
40*e3723e1fSApple OSS Distributions /*
41*e3723e1fSApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*e3723e1fSApple OSS Distributions * infinite loop, so fail via too_long.
43*e3723e1fSApple OSS Distributions */
44*e3723e1fSApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*e3723e1fSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*e3723e1fSApple OSS Distributions
47*e3723e1fSApple OSS Distributions /* this will hang if the bug is there: */
48*e3723e1fSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*e3723e1fSApple OSS Distributions
50*e3723e1fSApple OSS Distributions /* expecting a clean, zero exit: */
51*e3723e1fSApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*e3723e1fSApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*e3723e1fSApple OSS Distributions }
54