A signal is a mechanism for transferring control that is typically used to notify a process that an event has occurred. That process can then respond to that event accordingly. The C standard provides Standard provides functions for sending and handling signals within a C program.
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POSIX recommends sigaction() and deprecates signal(). Unfortunately, sigaction() is not defined in the C standard and Standard and is consequently not as portable a solution.
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Search for vulnerabilities resulting from the violation of this rule on the CERT website.
Related Guidelines
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| Insufficient synchronization |
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ISO/IEC 2003 Section 5.2.3, "Signals and interrupts"
Bibliography
| [Dowd 2006] | Chapter 13, "Synchronization and State" ("Signal |
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| Interruption and |
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| Repetition") | |
| [ISO/IEC 2003] | Section 5.2.3, "Signals and Interrupts" |
| [Open Group 2004] | longjmp |
| [OpenBSD] | signal() Man Page |
| [Zalewski 2001] |