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This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-03-09 and was most recently seen on 2026-03-09.
A close system call is a system call used to close a file descriptor by the kernel. For most file systems, a program terminates access to a file in a filesystem using the close system call. This flushes file buffers, updates file metadata, which may include and end-of-file indicator in the data; de-allocates resources associated with the file and updates the system wide table of files in use. Some programming languages maintain a data structure of files opened by their runtime library and may close when the program terminates. This practice is known as resource acquisition is initialization (RAII). Some operating systems will invoke close on files held by a program if it terminates. Some operating systems will invoke the close syscall as part of an operating system recovery as a result of a system failure.
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