source: azure_iot_hub/trunk/musl-1.1.18/src/fcntl/open.c@ 388

#include <fcntl.h>
#include <stdarg.h>
#include "syscall.h"
#include "libc.h"

int open(const char *filename, int flags, ...)
{
        mode_t mode = 0;

        if ((flags & O_CREAT) || (flags & O_TMPFILE) == O_TMPFILE) {
                va_list ap;
                va_start(ap, flags);
                mode = va_arg(ap, mode_t);
                va_end(ap);
        }

        int fd = __sys_open_cp(filename, flags, mode);
        if (fd>=0 && (flags & O_CLOEXEC))
                __syscall(SYS_fcntl, fd, F_SETFD, FD_CLOEXEC);

        return __syscall_ret(fd);
}

LFS64(open);