Description | Unused signal |
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Default action | Abnormal termination of the process |
SA_SIGINFO macros | |
None |
On some Unix-like platforms, SIGUNUSED is a signal that has no purpose at present but is intended for future use. The symbolic constant for SIGUNUSED is defined in the header file signal.h
. Symbolic signal names are used because signal numbers can vary across platforms.
SIG is a common prefix for signal names. UNUSED is the word unused.
In Linux 2.6 on the x86, PowerPC and SuperH architectures, signal 31 is designated for future use as SIGSYS; since SIGSYS is currently unimplemented, the signal number is temporarily assigned to SIGUNUSED instead.
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