github.com/afumu/libc@v0.0.6/musl/src/unistd/pipe2.c (about)

     1  #include <unistd.h>
     2  #include <errno.h>
     3  #include <fcntl.h>
     4  #include "syscall.h"
     5  
     6  int pipe2(int fd[2], int flag)
     7  {
     8  	if (!flag) return pipe(fd);
     9  	int ret = __syscall(SYS_pipe2, fd, flag);
    10  	if (ret != -ENOSYS) return __syscall_ret(ret);
    11  	ret = pipe(fd);
    12  	if (ret) return ret;
    13  	if (flag & O_CLOEXEC) {
    14  		__syscall(SYS_fcntl, fd[0], F_SETFD, FD_CLOEXEC);
    15  		__syscall(SYS_fcntl, fd[1], F_SETFD, FD_CLOEXEC);
    16  	}
    17  	if (flag & O_NONBLOCK) {
    18  		__syscall(SYS_fcntl, fd[0], F_SETFL, O_NONBLOCK);
    19  		__syscall(SYS_fcntl, fd[1], F_SETFL, O_NONBLOCK);
    20  	}
    21  	return 0;
    22  }