Signal Handling--ref

intSIGABRT

This signal indicates an error detected by the program itself and reported by callingabort. See section.

intSIGIOT

Generated by the PDP-11 "iot" instruction. On most machines,this is just another name forSIGABRT.

intSIGTRAP

Generated by the machine's breakpoint instruction,and possibly other trap instructions. This signal is used by debuggers. Your program will probably only seeSIGTRAPif it is somehow executing bad instructions.

intSIGEMT

Emulator trap; this results from certain unimplemented instructions which might be emulated in software,or the operating system's failure to properly emulate them.

intSIGSYS

Bad system call; that is to say,the instruction to trap to the operating system was executed,but the code number for the system call to perform was invalid.

intSIGTERM

TheSIGTERMsignal is a generic signal used to cause program termination. UnlikeSIGKILL,this signal can be blocked,handled,and ignored. It is the normal way to politely ask a program to terminate.

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