Available signals

The following signals are generated on the Interix Software Development Kit (SDK). The default action for all of these signals is termination of the process. Other signals are defined in <signal.h>, so you can pass them to kill(), but they are not generated.

Signal	Meaning
SIGABRT	Abnormal termination (see abort())
SIGALRM	Time out (see alarm())
SIGBUS	Access to an unidentified portion of a memory process
SIGEXECPT	Unclassified NT exception—historically SIGEMT
SIGFPE	Erroneous arithmetic operation
SIGHUP	Controlling terminal hung up
SIGILL	Hardware interrupt (illegal instruction)
SIGINT	Interactive interrupt
SIGIO	Input/output (I/O) is possible on a descriptor
SIGIOT	Old signal for PDP11/VAX I/O trap instruction
SIGKILL	Termination (cannot be caught or ignored)
SIGPIPE	Write on a pipe that is not open for reading by any process
SIGPOLL	Pollable event
SIGPROF	Profiling timer expired
SIGQUIT	Interactive termination signal
SIGSEGV	Invalid memory reference
SIGSYS	Bad system call
SIGTERM	Termination signal
SIGTRAP	Trace/breakpoint trap
SIGURG	Urgent condition on socket
SIGUSR1	Application-defined signal 1
SIGUSR2	Application-defined signal 2
SIGVTALRM	Virtual time alarm
SIGWINCH	Window size change
SIGXCPU	CPU time limit exceeded
SIGXFSZ	File size limit exceeded

The following job-control signals are provided:

Signal	Meaning	Default action
SIGCHLD	Child process stopped or terminated	Ignored
SIGCONT	Continue	Continue if stopped
SIGSTOP	Stop (cannot be caught or ignored)	Stop process
SIGTSTP	Interactive stop	Stop process
SIGTTIN	Read from controlling terminal by background process	Stop process
SIGTTOU	Write to controlling terminal by background process	Stop process

The SIGCHLD signal is not the System V SIGCLD signal; it has slightly different semantics. SIGCLD is synonymous with SIGCHLD, and SIGIOT is synonymous with SIGABRT.