github.com/afumu/libc@v0.0.6/musl/src/network/socket.c (about)

     1  #include <sys/socket.h>
     2  #include <fcntl.h>
     3  #include <errno.h>
     4  #include "syscall.h"
     5  
     6  int socket(int domain, int type, int protocol)
     7  {
     8  	int s = __socketcall(socket, domain, type, protocol, 0, 0, 0);
     9  	if ((s==-EINVAL || s==-EPROTONOSUPPORT)
    10  	    && (type&(SOCK_CLOEXEC|SOCK_NONBLOCK))) {
    11  		s = __socketcall(socket, domain,
    12  			type & ~(SOCK_CLOEXEC|SOCK_NONBLOCK),
    13  			protocol, 0, 0, 0);
    14  		if (s < 0) return __syscall_ret(s);
    15  		if (type & SOCK_CLOEXEC)
    16  			__syscall(SYS_fcntl, s, F_SETFD, FD_CLOEXEC);
    17  		if (type & SOCK_NONBLOCK)
    18  			__syscall(SYS_fcntl, s, F_SETFL, O_NONBLOCK);
    19  	}
    20  	return __syscall_ret(s);
    21  }