77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
#include <errno.h>
|
|
#include <signal.h>
|
|
|
|
#include "test.h"
|
|
#include "usctest.h"
|
|
|
|
const char *TCID = "checksignal"; /* Test program identifier. */
|
|
int TST_TOTAL = 3; /* Total number of test cases. */
|
|
extern int Tst_count; /* Test Case counter for tst_* routines */
|
|
|
|
void
|
|
sig_handler (int signo)
|
|
{
|
|
errno = EINVAL;
|
|
}
|
|
|
|
int
|
|
main ()
|
|
{
|
|
int n, ret;
|
|
int fds[2];
|
|
char buf[10];
|
|
struct sigaction act;
|
|
|
|
Tst_count = 0;
|
|
|
|
if (pipe (fds) < 0)
|
|
tst_brk (TBROK, NULL, NULL, "Create pipe");
|
|
|
|
/* Reset SA_RESTART flag. */
|
|
while ((ret = sigaction (SIGALRM, NULL, &act)) == EINTR)
|
|
;
|
|
if (ret)
|
|
tst_brk (TBROK, NULL, NULL, "Get signal action structure");
|
|
act.sa_flags &= ~SA_RESTART;
|
|
while ((ret = sigaction (SIGALRM, &act, NULL)) == EINTR)
|
|
;
|
|
if (ret)
|
|
tst_brk (TBROK, NULL, NULL, "Reset SA_RESTART");
|
|
|
|
/* Set signal handler using signal(2) call... */
|
|
if (signal (SIGALRM, sig_handler) < 0)
|
|
tst_brk (TBROK, NULL, NULL, "Call signal() to install signal handler");
|
|
/* ...and check if signal(2) sets SA_RESTART again. */
|
|
while ((ret = sigaction (SIGALRM, NULL, &act)) == EINTR)
|
|
;
|
|
if (ret)
|
|
tst_brk (TBROK, NULL, NULL, "Get signal action structure");
|
|
tst_resm (act.sa_flags & SA_RESTART ? TPASS : TFAIL,
|
|
"signal() sets SA_RESTART");
|
|
|
|
/* Reset SA_RESTART flag again. */
|
|
act.sa_handler = sig_handler;
|
|
act.sa_flags &= ~SA_RESTART;
|
|
while ((ret = sigaction (SIGALRM, &act, NULL)) == EINTR)
|
|
;
|
|
if (ret)
|
|
tst_brk (TBROK, NULL, NULL, "Reset SA_RESTART");
|
|
|
|
/* Start timer to force a SIGALRM. */
|
|
alarm (1);
|
|
|
|
/* Call read(2) to check if the EINTR errno is correctly preserved,
|
|
even if the signal handler routine changes errno. */
|
|
n = read(fds[0], buf, 10);
|
|
tst_resm (n < 0 && errno == EINTR ? TPASS : TFAIL,
|
|
"Set EINTR on interrupted read() call");
|
|
|
|
/* Check if another errno is correctly returned (here EBADF). */
|
|
close (fds[0]);
|
|
n = read(fds[0], buf, 10);
|
|
tst_resm (n < 0 && errno == EBADF ? TPASS : TFAIL,
|
|
"Set EBADF on closed file descriptor");
|
|
|
|
tst_exit ();
|
|
}
|