If O_NONBLOCK is set, an open() for reading-only shall return without delay. An open() for writing-only shall return an error if no process currently has the ...
The return value of open() is a file descriptor, a small, nonnegative integer that is an index to an entry in the process's table of open file descriptors. The ...
Open for reading only. O_WRONLY: Open for writing only. O_RDWR: Open for reading and writing. The result is undefined if this flag is applied to a FIFO. Any ...
2013年10月14日 — From Linux manual page for open(2):. Unlike the other values that can ... C linux internal difference between O_WRONLY and O_RDWR if only writting.