signalfd.c raw

   1  #include <sys/signalfd.h>
   2  #include <signal.h>
   3  #include <errno.h>
   4  #include <fcntl.h>
   5  #include "syscall.h"
   6  
   7  int signalfd(int fd, const sigset_t *sigs, int flags)
   8  {
   9  	int ret = __syscall(SYS_signalfd4, fd, sigs, _NSIG/8, flags);
  10  #ifdef SYS_signalfd
  11  	if (ret != -ENOSYS) return __syscall_ret(ret);
  12  	ret = __syscall(SYS_signalfd, fd, sigs, _NSIG/8);
  13  	if (ret >= 0) {
  14  		if (flags & SFD_CLOEXEC)
  15  			__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
  16  		if (flags & SFD_NONBLOCK)
  17  			__syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK);
  18  	}
  19  #endif
  20  	return __syscall_ret(ret);
  21  }
  22