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In computing, mkstemp is a POSIX function for creating a temporary file (a computer file which usually ceases to exist when the program, which opened the file, closes it or terminates). [1] It accepts an argument that determines the location of the temporary file, and the prefix of its generated filename. [ 1 ]
On modern POSIX systems, temporary files can be safely created with the mkstemp C library function. The delivery process stores the message in the maildir by creating and writing to tmp/uniquefilename, and then moving this file to new/uniquefilename. The moving can be done using rename, which is atomic in many systems. [10]
A temporary file is a file created to store information temporarily, either for a program's intermediate use or for transfer to a permanent file when complete. [1] It may be created by computer programs for a variety of purposes, such as when a program cannot allocate enough memory for its tasks, when the program is working on data bigger than the architecture's address space, or as a ...
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Its function is to retrieve information for the accounts specified by the user. For "efficiency", it sorts the requested accounts into a temporary file (/tmp/foo naturally) before making the queries. The directory /tmp is world-writable. Malicious user Mallory creates a symbolic link to the file /root/.rhosts named /tmp/foo.
The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services.