C process control
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| C Standard Library |
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C process control refers to a group of functions in the standard library of the C programming language implementing basic process control operations.[1][2] The process control operations include actions such as termination of the program with various levels of cleanup, running an external command interpreter or accessing the list of the environment operations.
[edit] Overview of functions
The process control functions are defined in the stdlib.h header (cstdlib header in C++).
| Function | Description | |
|---|---|---|
| Terminating a program |
abort |
causes abnormal program termination (without cleaning up) |
exit |
causes normal program termination with cleaning up | |
_Exit |
causes normal program termination without cleaning up (C99) | |
atexit |
registers a function to be called on exit() invocation | |
| Communicating with the environment |
getenv |
accesses the list of the environment variables |
system |
calls the host environment's command processor |
[edit] References
- ^ Crawford, Tony; Peter Prinz (December 2005). C in Nutshell. §16.11 - Process Control: O'Reilly. pp. 618. ISBN 0-596-00697-7.
- ^ ISO/IEC 9899:1999 specification. p. 315, § 7.20.4 "Communication with the environment". http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf. Retrieved 25 November 2011.
[edit] External links
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