```
rt_sigaction(SIGINT, {sa_handler=0x489af0, sa_mask=[], sa_flags=SA_RESTORER|SA_INTERRUPT, sa_restorer=0x7f255f9b70f0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [WINCH], [WINCH], 8) = 0
rt_sigprocmask(SIG_BLOCK, [WINCH], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x489af0, sa_mask=[], sa_flags=SA_RESTORER|SA_INTERRUPT, sa_restorer=0x7f255f9b70f0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [WINCH], [WINCH], 8) = 0
rt_sigprocmask(SIG_BLOCK, [WINCH], [], 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x489af0, sa_mask=[], sa_flags=SA_RESTORER|SA_INTERRUPT, sa_restorer=0x7f255f9b70f0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [WINCH], [WINCH], 8) = 0
rt_sigprocmask(SIG_BLOCK, [WINCH], [], 8) = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [WINCH], 8) = 0
pipe([3, 4])                            = 0
fcntl(3, F_DUPFD, 10)                   = 12
close(3)                                = 0
fcntl(4, F_DUPFD, 10)                   = 13
close(4)                                = 0
rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD WINCH], 8) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f255f95ba10) = 19327
close(13)                               = 0
rt_sigprocmask(SIG_UNBLOCK, [CHLD], [CHLD WINCH], 8) = 0
read(12,
```