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In computing, exit is a command used in many operating system command-line shells and scripting languages.. The command causes the shell or program to terminate.If performed within an interactive command shell, the user is logged out of their current session, and/or user's current console or terminal connection is disconnected.
The EOT character is used in legacy communications protocols by mainframe computer manufacturers such as IBM, Burroughs Corporation, and the BUNCH.Terminal transmission control protocols such as IBM 3270 Poll/Select, or Burroughs TD830 Contention Mode protocol use the EOT character to terminate a communications sequence between two cooperating stations (such as a host multiplexer or Input ...
A C program may also use the exit() function specifying the integer status or exit macro as the first parameter. The return value from main is passed to the exit function, which for values zero, EXIT_SUCCESS or EXIT_FAILURE may translate it to "an implementation defined form" of successful termination or unsuccessful termination .
The exit operation typically performs clean-up operations within the process space before returning control back to the operating system. Some systems and programming languages allow user subroutines to be registered so that they are invoked at program termination before the process actually terminates for good. As the final step of termination ...
For example, a watchdog timer can terminate a process that remains idle beyond a specified time limit. [3] [4] Database Transactions: In database management, aborting (often termed ‘rolling back’) a transaction is crucial for maintaining data integrity. If a transaction cannot be completed successfully, aborting it returns the database to ...
The jobs command will list the background jobs existing in the job table, along with their job number and job state (stopped or running). When a session ends when the user logs out (exits the shell, which terminates the session leader process), the shell process sends SIGHUP to all jobs, and waits for the process groups to end before ...
Doctors explain why your scalp hurts, what it means, and how to treat it.
Similarly, the kill(1) command allows a user to send signals to processes. The raise(3) library function sends the specified signal to the current process. Exceptions such as division by zero, segmentation violation , and floating point exception will cause a core dump and terminate the program.