diff options
| -rw-r--r-- | posix/tst-waitid.c | 171 |
1 files changed, 169 insertions, 2 deletions
diff --git a/posix/tst-waitid.c b/posix/tst-waitid.c index 7c0bad6..3befe1a 100644 --- a/posix/tst-waitid.c +++ b/posix/tst-waitid.c @@ -29,6 +29,10 @@ static void test_child (void) { + /* Wait a second to be sure the parent set his variables before we + produce a SIGCHLD. */ + sleep (1); + /* First thing, we stop ourselves. */ raise (SIGSTOP); @@ -43,9 +47,87 @@ test_child (void) # define WSTOPPED WUNTRACED #endif +static sig_atomic_t expecting_sigchld, spurious_sigchld; +#ifdef SA_SIGINFO +static siginfo_t sigchld_info; + +static void +sigchld (int signo, siginfo_t *info, void *ctx) +{ + if (signo != SIGCHLD) + { + error (0, 0, "SIGCHLD handler got signal %d instead!", signo); + _exit (EXIT_FAILURE); + } + + if (! expecting_sigchld) + { + spurious_sigchld = 1; + error (0, 0, + "spurious SIGCHLD: signo %d code %d status %d pid %d\n", + info->si_signo, info->si_code, info->si_status, info->si_pid); + } + else + { + sigchld_info = *info; + expecting_sigchld = 0; + } +} + +static void +check_sigchld (const char *phase, int *ok, int code, int status, pid_t pid) +{ + if (expecting_sigchld) + { + error (0, 0, "missing SIGCHLD on %s", phase); + *ok = EXIT_FAILURE; + expecting_sigchld = 0; + return; + } + + if (sigchld_info.si_signo != SIGCHLD) + { + error (0, 0, "SIGCHLD for %s signal %d", phase, sigchld_info.si_signo); + *ok = EXIT_FAILURE; + } + if (sigchld_info.si_code != code) + { + error (0, 0, "SIGCHLD for %s code %d", phase, sigchld_info.si_code); + *ok = EXIT_FAILURE; + } + if (sigchld_info.si_status != status) + { + error (0, 0, "SIGCHLD for %s status %d", phase, sigchld_info.si_status); + *ok = EXIT_FAILURE; + } + if (sigchld_info.si_pid != pid) + { + error (0, 0, "SIGCHLD for %s pid %d", phase, sigchld_info.si_pid); + *ok = EXIT_FAILURE; + } +} +# define CHECK_SIGCHLD(phase, code_check, status_check) \ + check_sigchld ((phase), &status, (code_check), (status_check), pid) +#else +# define CHECK_SIGCHLD(phase, code, status) ((void) 0) +#endif + static int do_test (int argc, char *argv[]) { +#ifdef SA_SIGINFO + struct sigaction sa; + sa.sa_flags = SA_SIGINFO|SA_RESTART; + sa.sa_sigaction = &sigchld; + if (sigemptyset (&sa.sa_mask) < 0 || sigaction (SIGCHLD, &sa, NULL) < 0) + { + error (0, errno, "setting SIGCHLD handler"); + return EXIT_FAILURE; + } +#endif + + expecting_sigchld = 1; + pid_t pid = fork (); if (pid < 0) { @@ -59,10 +141,13 @@ do_test (int argc, char *argv[]) } int status = EXIT_SUCCESS; -#define RETURN(ok) status = (ok); goto out; +#define RETURN(ok) \ + do { if (status == EXIT_SUCCESS) status = (ok); goto out; } while (0) /* Give the child a chance to stop. */ - sleep (2); + sleep (3); + + CHECK_SIGCHLD ("stopped", CLD_STOPPED, SIGSTOP); /* Now try a wait that should not succeed. */ siginfo_t info; @@ -126,6 +211,8 @@ do_test (int argc, char *argv[]) } } + expecting_sigchld = WCONTINUED != 0; + if (kill (pid, SIGCONT) != 0) { error (0, errno, "kill (%d, SIGCONT)", pid); @@ -136,6 +223,55 @@ do_test (int argc, char *argv[]) sleep (2); #if WCONTINUED != 0 + if (expecting_sigchld) + { + error (0, 0, "no SIGCHLD seen for SIGCONT (optional)"); + expecting_sigchld = 0; + } + else + CHECK_SIGCHLD ("continued", CLD_CONTINUED, SIGCONT); + + info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ + info.si_pid = -1; + info.si_status = -1; + fail = waitid (P_PID, pid, &info, WCONTINUED|WNOWAIT); + switch (fail) + { + default: + error (0, 0, + "waitid WCONTINUED|WNOWAIT returned bogus value %d\n", fail); + RETURN (EXIT_FAILURE); + case -1: + error (0, errno, "waitid WCONTINUED|WNOWAIT on continued"); + RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); + case 0: + if (info.si_signo != SIGCHLD) + { + error (0, 0, "waitid WCONTINUED|WNOWAIT on continued signal %d\n", + info.si_signo); + RETURN (EXIT_FAILURE); + } + if (info.si_code != CLD_CONTINUED) + { + error (0, 0, "waitid WCONTINUED|WNOWAIT on continued code %d\n", + info.si_code); + RETURN (EXIT_FAILURE); + } + if (info.si_status != SIGCONT) + { + error (0, 0, "waitid WCONTINUED|WNOWAIT on continued status %d\n", + info.si_status); + RETURN (EXIT_FAILURE); + } + if (info.si_pid != pid) + { + error (0, 0, "waitid WCONTINUED|WNOWAIT on continued pid %d != %d\n", + info.si_pid, pid); + RETURN (EXIT_FAILURE); + } + } + + /* That should leave the CLD_CONTINUED state waiting to be seen again. */ info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; @@ -174,8 +310,35 @@ do_test (int argc, char *argv[]) RETURN (EXIT_FAILURE); } } + + /* Now try a wait that should not succeed. */ + info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ + fail = waitid (P_PID, pid, &info, WCONTINUED|WNOHANG); + switch (fail) + { + default: + error (0, 0, "waitid returned bogus value %d\n", fail); + RETURN (EXIT_FAILURE); + case -1: + error (0, errno, "waitid WCONTINUED|WNOHANG on waited continued"); + RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE); + case 0: + if (info.si_signo == 0) + break; + if (info.si_signo == SIGCHLD) + error (0, 0, + "waitid WCONTINUED|WNOHANG on waited continued status %d\n", + info.si_status); + else + error (0, 0, + "waitid WCONTINUED|WNOHANG on waited continued signal %d\n", + info.si_signo); + RETURN (EXIT_FAILURE); + } #endif + expecting_sigchld = 1; + /* Die, child, die! */ if (kill (pid, SIGKILL) != 0) { @@ -227,6 +390,8 @@ do_test (int argc, char *argv[]) sleep (2); #endif + CHECK_SIGCHLD ("killed", CLD_KILLED, SIGKILL); + info.si_signo = 0; /* A successful call sets it to SIGCHLD. */ info.si_pid = -1; info.si_status = -1; @@ -283,6 +448,8 @@ do_test (int argc, char *argv[]) #undef RETURN out: + if (spurious_sigchld) + status = EXIT_FAILURE; kill (pid, SIGKILL); /* Make sure it's dead if we bailed early. */ return status; } |