131 lines
2.2 KiB
C
131 lines
2.2 KiB
C
#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/select.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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static volatile int handler_called;
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static void
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handler (int sig)
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{
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handler_called = 1;
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}
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static int
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do_test (void)
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{
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struct sigaction sa;
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sa.sa_handler = handler;
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sa.sa_flags = 0;
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sigemptyset (&sa.sa_mask);
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if (sigaction (SIGUSR1, &sa, NULL) != 0)
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{
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puts ("sigaction failed");
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return 1;
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}
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sa.sa_handler = SIG_IGN;
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if (sigaction (SIGCHLD, &sa, NULL) != 0)
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{
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puts ("2nd sigaction failed");
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return 1;
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}
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sigset_t ss_usr1;
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sigemptyset (&ss_usr1);
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sigaddset (&ss_usr1, SIGUSR1);
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if (sigprocmask (SIG_BLOCK, &ss_usr1, NULL) != 0)
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{
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puts ("sigprocmask failed");
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return 1;
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}
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int fds[2][2];
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if (pipe (fds[0]) != 0 || pipe (fds[1]) != 0)
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{
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puts ("pipe failed");
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return 1;
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}
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fd_set rfds;
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FD_ZERO (&rfds);
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sigset_t ss;
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sigprocmask (SIG_SETMASK, NULL, &ss);
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sigdelset (&ss, SIGUSR1);
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struct timespec to = { .tv_sec = 0, .tv_nsec = 500000000 };
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pid_t parent = getpid ();
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pid_t p = fork ();
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if (p == 0)
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{
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close (fds[0][1]);
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close (fds[1][0]);
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FD_SET (fds[0][0], &rfds);
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int e;
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do
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{
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if (getppid () != parent)
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exit (2);
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errno = 0;
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e = pselect (fds[0][0] + 1, &rfds, NULL, NULL, &to, &ss);
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}
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while (e == 0);
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if (e != -1)
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{
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puts ("child: pselect did not fail");
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return 0;
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}
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if (errno != EINTR)
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{
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puts ("child: pselect did not set errno to EINTR");
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return 0;
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}
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TEMP_FAILURE_RETRY (write (fds[1][1], "foo", 3));
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exit (0);
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}
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close (fds[0][0]);
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close (fds[1][1]);
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FD_SET (fds[1][0], &rfds);
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kill (p, SIGUSR1);
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int e = pselect (fds[1][0] + 1, &rfds, NULL, NULL, NULL, &ss);
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if (e == -1)
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{
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puts ("parent: pselect failed");
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return 1;
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}
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if (e != 1)
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{
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puts ("parent: pselect did not report readable fd");
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return 1;
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}
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if (!FD_ISSET (fds[1][0], &rfds))
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{
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puts ("parent: pselect reports wrong fd");
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return 1;
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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