1*5c2921b0SApple OSS Distributions #include <stdio.h>
2*5c2921b0SApple OSS Distributions #include <stdlib.h>
3*5c2921b0SApple OSS Distributions
4*5c2921b0SApple OSS Distributions #include <sys/types.h>
5*5c2921b0SApple OSS Distributions #include <sys/uio.h>
6*5c2921b0SApple OSS Distributions #include <unistd.h>
7*5c2921b0SApple OSS Distributions
8*5c2921b0SApple OSS Distributions #include <darwintest.h>
9*5c2921b0SApple OSS Distributions
10*5c2921b0SApple OSS Distributions static void
too_long(int ignored)11*5c2921b0SApple OSS Distributions too_long(int ignored)
12*5c2921b0SApple OSS Distributions {
13*5c2921b0SApple OSS Distributions T_ASSERT_FAIL("child readv is blocked");
14*5c2921b0SApple OSS Distributions }
15*5c2921b0SApple OSS Distributions
16*5c2921b0SApple OSS Distributions T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
17*5c2921b0SApple OSS Distributions {
18*5c2921b0SApple OSS Distributions int p[2];
19*5c2921b0SApple OSS Distributions char c = 0;
20*5c2921b0SApple OSS Distributions struct iovec iov = {
21*5c2921b0SApple OSS Distributions .iov_base = &c,
22*5c2921b0SApple OSS Distributions .iov_len = 0x100000000UL
23*5c2921b0SApple OSS Distributions };
24*5c2921b0SApple OSS Distributions pid_t child;
25*5c2921b0SApple OSS Distributions int status = 0;
26*5c2921b0SApple OSS Distributions
27*5c2921b0SApple OSS Distributions T_SETUPBEGIN;
28*5c2921b0SApple OSS Distributions /* create a pipe with some data in it: */
29*5c2921b0SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
30*5c2921b0SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
31*5c2921b0SApple OSS Distributions T_SETUPEND;
32*5c2921b0SApple OSS Distributions
33*5c2921b0SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
34*5c2921b0SApple OSS Distributions
35*5c2921b0SApple OSS Distributions if (!child) {
36*5c2921b0SApple OSS Distributions readv(p[0], &iov, 1);
37*5c2921b0SApple OSS Distributions exit(0);
38*5c2921b0SApple OSS Distributions }
39*5c2921b0SApple OSS Distributions
40*5c2921b0SApple OSS Distributions /*
41*5c2921b0SApple OSS Distributions * if the waitpid takes too long, the child is probably stuck in the
42*5c2921b0SApple OSS Distributions * infinite loop, so fail via too_long.
43*5c2921b0SApple OSS Distributions */
44*5c2921b0SApple OSS Distributions T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
45*5c2921b0SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
46*5c2921b0SApple OSS Distributions
47*5c2921b0SApple OSS Distributions /* this will hang if the bug is there: */
48*5c2921b0SApple OSS Distributions T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
49*5c2921b0SApple OSS Distributions
50*5c2921b0SApple OSS Distributions /* expecting a clean, zero exit: */
51*5c2921b0SApple OSS Distributions T_ASSERT_TRUE(WIFEXITED(status), NULL);
52*5c2921b0SApple OSS Distributions T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
53*5c2921b0SApple OSS Distributions }
54