In most operating systems, it is possible to have a lock on a file from one process and still allow another process to read that file. However, the behavior depends on the type of file lock used and how the second process tries to access the file.

There are two main types of file locks:

Shared locks (also known as read locks): These locks allow multiple processes to read the file simultaneously, but prevent any process from obtaining a write lock on the file until all shared locks are released.

Exclusive locks (also known as write locks): These locks prevent any other process from obtaining a shared or exclusive lock on the file. An exclusive lock is typically used by a process that needs to modify the file, ensuring that no other process can read or write to the file while the lock is held.

If a process holds a shared lock on a file, another process can still read the file without being blocked. However, if a process holds an exclusive lock on the file, another process attempting to read the file may be blocked, depending on how the second process tries to access the file and the specific behavior of the file locking mechanism in the operating system.

In some cases, you can use non-blocking file access methods to avoid blocking when attempting to read a file that is locked by another process. These methods return immediately if the file is locked, allowing your program to handle the situation as needed (e.g., by retrying the operation later or reporting an error).
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