OSSignal

invalid

hangup

interrupt

quit

illegal instruction (not reset when caught)

trace trap (not reset when caught)

abort()

compatibility

EMT instruction

floating point exception

kill (cannot be caught or ignored)

bus error

segmentation violation

bad argument to system call

write on a pipe with no one to read it

alarm clock

software termination signal from kill

urgent condition on IO channel

sendable stop signal not from tty

stop signal from tty

continue a stopped process

to parent on child stop or exit

to readers pgrp upon background tty read

like TTIN for output if (tp->t_local&LTOSTOP)

input/output possible signal

exceeded CPU time limit

exceeded file size limit

virtual time alarm

profiling time alarm

window size changes

information request

user defined signal 1

user defined signal 2