/** @file  ../include/sys/signal.h

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/** @typedef typedef	__sigset_t	sigset_t

The sigset_t data type is used to represent a signal set. 

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/** @def SIG_DFL	

Request for default signal handling.

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/** @def SIG_IGN

Request that signal be ignored.

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/** @def SIG_ERR			

Return value from signal() in case of error.

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/** @def SIGHUP		

Hangup.

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/** @def SIGQUIT		

Terminal quit signal.

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/** @def SIGILL		

Illegal opcode.

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/** @def SIGTRAP	

trace trap (not reset when caught)

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/** @def SIGABRT	

abort()

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/** @def SIGIOT			

compatibility

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/** @def SIGEMT		

EMT instruction

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/** @def SIGFPE		

floating point exception 

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/** @def SIGKILL		

kill (cannot be caught or ignored)

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/** @def SIGBUS		

bus error

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/** @def SIGSEGV	

segmentation violation 

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/** @def SIGSYS		

non-existent system call invoked

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/** @def SIGALRM	

alarm clock

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/** @def SIGTERM	

software termination signal from kill

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/** @def SIGURG		

urgent condition on IO channel

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/** @def SIGSTOP	

sendable stop signal not from tty 

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/** @def SIGTSTP

stop signal from tty

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/** @def SIGCONT	

continue a stopped process 

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/** @def SIGCHLD

to parent on child stop or exit

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/** @def SIGTTIN		

to readers pgrp upon background tty read

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/** @def SIGTTOU	

like TTIN 

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/** @def SIGIO		

input or output possible signal

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/** @def SIGXCPU		

exceeded CPU time limit

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/** @def SIGXFSZ	

exceeded file size limit

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/** @def SIGVTALRM	

virtual time alarm 

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/** @def SIGPROF	

profiling time alarm 

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/** @def SIGWINCH

window size changes

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/** @def SIGINFO	

information request 

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/** @def SIGUSR1	

user defined signal 1 

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/** @def SIGUSR2	

user defined signal 2

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/** @def SIGTHR		

Thread interrupt.

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/** @def NSIG

number of old signals (counting 0)

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/** @def SA_ONSTACK		

take signal on signal stack

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/** @def SA_RESTART	

restart system call on signal return 

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/** @def SA_RESETHAND		

reset to SIG_DFL when taking signal 

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/** @def SA_NODEFER		

don't mask the signal we're delivering 

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/** @def SA_NOCLDWAIT	

don't keep zombies around 

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/** @def SA_SIGINFO		

signal handler with SA_SIGINFO args 

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*/