1*33de042dSApple OSS Distributions #include <util.h>
2*33de042dSApple OSS Distributions #include <stdlib.h>
3*33de042dSApple OSS Distributions #include <fcntl.h>
4*33de042dSApple OSS Distributions #include <termios.h>
5*33de042dSApple OSS Distributions #include <signal.h>
6*33de042dSApple OSS Distributions #include <darwintest.h>
7*33de042dSApple OSS Distributions #include <darwintest_multiprocess.h>
8*33de042dSApple OSS Distributions
9*33de042dSApple OSS Distributions #define TEST_TIMEOUT 10
10*33de042dSApple OSS Distributions
11*33de042dSApple OSS Distributions T_GLOBAL_META(
12*33de042dSApple OSS Distributions T_META_RUN_CONCURRENTLY(TRUE));
13*33de042dSApple OSS Distributions
14*33de042dSApple OSS Distributions static void
sigio_handler(__unused int sig)15*33de042dSApple OSS Distributions sigio_handler(__unused int sig)
16*33de042dSApple OSS Distributions {
17*33de042dSApple OSS Distributions /* Do nothing; this should never actually be called. */
18*33de042dSApple OSS Distributions }
19*33de042dSApple OSS Distributions
20*33de042dSApple OSS Distributions T_HELPER_DECL(pty_121077498_impl, "fork helper")
21*33de042dSApple OSS Distributions {
22*33de042dSApple OSS Distributions int primary, replica, flags;
23*33de042dSApple OSS Distributions char rname[128], c;
24*33de042dSApple OSS Distributions sigset_t sigio_set, received_set;
25*33de042dSApple OSS Distributions
26*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(sigemptyset(&sigio_set), "sigemptyset");
27*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(sigaddset(&sigio_set, SIGIO), "sigaddset");
28*33de042dSApple OSS Distributions
29*33de042dSApple OSS Distributions /*
30*33de042dSApple OSS Distributions * New session, lose any existing controlling terminal and become
31*33de042dSApple OSS Distributions * session leader.
32*33de042dSApple OSS Distributions */
33*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(setsid(), NULL);
34*33de042dSApple OSS Distributions
35*33de042dSApple OSS Distributions /* Open the primary side, following `openpty`'s implementation. */
36*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(primary = posix_openpt(O_RDWR | O_NOCTTY), NULL);
37*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(grantpt(primary), NULL);
38*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(unlockpt(primary), NULL);
39*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(ptsname_r(primary, rname, sizeof(rname)), NULL);
40*33de042dSApple OSS Distributions
41*33de042dSApple OSS Distributions /* Enable both O_NONBLOCK and O_ASYNC before opening the replica. */
42*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(flags = fcntl(primary, F_GETFL, 0), NULL);
43*33de042dSApple OSS Distributions flags |= O_NONBLOCK | O_ASYNC;
44*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(flags = fcntl(primary, F_SETFL, flags), NULL);
45*33de042dSApple OSS Distributions
46*33de042dSApple OSS Distributions /* Open the replica, making it our controlling terminal. */
47*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(replica = open(rname, O_RDWR, 0), "open %s", rname);
48*33de042dSApple OSS Distributions
49*33de042dSApple OSS Distributions /* Verify that we are non-blocking. */
50*33de042dSApple OSS Distributions T_EXPECT_POSIX_FAILURE(read(primary, &c, 1), EAGAIN, "read with no data returns EAGAIN");
51*33de042dSApple OSS Distributions
52*33de042dSApple OSS Distributions /* Set us up to detect when we get a SIGIO. */
53*33de042dSApple OSS Distributions T_EXPECT_TRUE(SIG_ERR != signal(SIGIO, sigio_handler), "set SIGIO handler");
54*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(sigprocmask(SIG_BLOCK, &sigio_set, NULL), "block SIGIO");
55*33de042dSApple OSS Distributions
56*33de042dSApple OSS Distributions /* Flush the replica, which should trigger a SIGIO. */
57*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(tcflush(replica, TCIOFLUSH), NULL);
58*33de042dSApple OSS Distributions
59*33de042dSApple OSS Distributions /* Verify that we got SIGIO. */
60*33de042dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(sigpending(&received_set), NULL);
61*33de042dSApple OSS Distributions T_ASSERT_TRUE(sigismember(&received_set, SIGIO), "received SIGIO when we flushed");
62*33de042dSApple OSS Distributions
63*33de042dSApple OSS Distributions /* Reset state. */
64*33de042dSApple OSS Distributions T_EXPECT_TRUE(SIG_ERR != signal(SIGIO, SIG_IGN), "reset SIGIO handler");
65*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(sigprocmask(SIG_UNBLOCK, &sigio_set, NULL), "unblock SIGIO");
66*33de042dSApple OSS Distributions
67*33de042dSApple OSS Distributions /* Close fds. */
68*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(close(replica), NULL);
69*33de042dSApple OSS Distributions T_EXPECT_POSIX_SUCCESS(close(primary), NULL);
70*33de042dSApple OSS Distributions }
71*33de042dSApple OSS Distributions
72*33de042dSApple OSS Distributions T_DECL(pty_121077498, "Ability to use O_NONBLOCK and O_ASYNC on pty primary without replica open.")
73*33de042dSApple OSS Distributions {
74*33de042dSApple OSS Distributions /*
75*33de042dSApple OSS Distributions * We need to do the test in a child process because we might have
76*33de042dSApple OSS Distributions * getpgrp() == getpid().
77*33de042dSApple OSS Distributions */
78*33de042dSApple OSS Distributions dt_helper_t helper = dt_child_helper("pty_121077498_impl");
79*33de042dSApple OSS Distributions dt_run_helpers(&helper, 1, TEST_TIMEOUT);
80*33de042dSApple OSS Distributions }
81