Why doesn't Linux support mmap by path?
The mmap syscall needs a fd as parameter, but when you close that fd, the mmap still alive in the process's memory address space.
So keeping a mmap doesn't need a opened fd. So why Linux only support create mmap of a file using a fd of it but not path of it? Wouldn't it be nice if we can have a mmapat syscall just like openat and execveat?
linux-kernel
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
add a comment |
The mmap syscall needs a fd as parameter, but when you close that fd, the mmap still alive in the process's memory address space.
So keeping a mmap doesn't need a opened fd. So why Linux only support create mmap of a file using a fd of it but not path of it? Wouldn't it be nice if we can have a mmapat syscall just like openat and execveat?
linux-kernel
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
add a comment |
The mmap syscall needs a fd as parameter, but when you close that fd, the mmap still alive in the process's memory address space.
So keeping a mmap doesn't need a opened fd. So why Linux only support create mmap of a file using a fd of it but not path of it? Wouldn't it be nice if we can have a mmapat syscall just like openat and execveat?
linux-kernel
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
The mmap syscall needs a fd as parameter, but when you close that fd, the mmap still alive in the process's memory address space.
So keeping a mmap doesn't need a opened fd. So why Linux only support create mmap of a file using a fd of it but not path of it? Wouldn't it be nice if we can have a mmapat syscall just like openat and execveat?
linux-kernel
linux-kernel
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
asked 11 mins ago
炸鱼薯条德里克炸鱼薯条德里克
436114
436114
add a comment |
add a comment |
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