1*1031c584SApple OSS Distributions #include <stdio.h>
2*1031c584SApple OSS Distributions #include <stdlib.h>
3*1031c584SApple OSS Distributions
4*1031c584SApple OSS Distributions #include <sys/types.h>
5*1031c584SApple OSS Distributions #include <sys/uio.h>
6*1031c584SApple OSS Distributions #include <unistd.h>
7*1031c584SApple OSS Distributions
8*1031c584SApple OSS Distributions #include <darwintest.h>
9*1031c584SApple OSS Distributions
10*1031c584SApple OSS Distributions static void
too_long(int ignored)11*1031c584SApple OSS Distributions too_long(int ignored)
12*1031c584SApple OSS Distributions {
13*1031c584SApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*1031c584SApple OSS Distributions }
15*1031c584SApple OSS Distributions
16*1031c584SApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*1031c584SApple OSS Distributions {
18*1031c584SApple OSS Distributions int p[2];
19*1031c584SApple OSS Distributions char c = 0;
20*1031c584SApple OSS Distributions struct iovec iov = {
21*1031c584SApple OSS Distributions .iov_base = &c,
22*1031c584SApple OSS Distributions .iov_len = 0x100000000UL
23*1031c584SApple OSS Distributions };
24*1031c584SApple OSS Distributions pid_t child;
25*1031c584SApple OSS Distributions int status = 0;
26*1031c584SApple OSS Distributions
27*1031c584SApple OSS Distributions T_SETUPBEGIN;
28*1031c584SApple OSS Distributions /* create a pipe with some data in it: */
29*1031c584SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*1031c584SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*1031c584SApple OSS Distributions T_SETUPEND;
32*1031c584SApple OSS Distributions
33*1031c584SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*1031c584SApple OSS Distributions
35*1031c584SApple OSS Distributions if (!child) {
36*1031c584SApple OSS Distributions readv(p[0], &iov, 1);
37*1031c584SApple OSS Distributions exit(0);
38*1031c584SApple OSS Distributions }
39*1031c584SApple OSS Distributions
40*1031c584SApple OSS Distributions /*
41*1031c584SApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*1031c584SApple OSS Distributions * infinite loop, so fail via too_long.
43*1031c584SApple OSS Distributions */
44*1031c584SApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*1031c584SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*1031c584SApple OSS Distributions
47*1031c584SApple OSS Distributions /* this will hang if the bug is there: */
48*1031c584SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*1031c584SApple OSS Distributions
50*1031c584SApple OSS Distributions /* expecting a clean, zero exit: */
51*1031c584SApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*1031c584SApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*1031c584SApple OSS Distributions }
54