Novell Doc: NDK: Libraries for C (LibC), Volume 2

Syntax

  #include <signal.h> 
   
  int kill (
     pid_t   pid,
     int     sig );

pid: (IN) Specifies the process. The value must be greater than 0 and specify an actual process.
sig: (IN) Specifies to the signal to send. For a list of supported signals, see Section 5.1, Standard Signals. If sig is null, error checking is performed, but no signal is sent. This can be used to check the validity of the pid parameter.

If successful, returns 0. Otherwise, returns -1 and sets errno to indicate the error:

Decimal	Constant	Description
9	EINVAL	The value of the sig parameter is invalid or unsupported.
69	EPERM	The process does not have permission to send the signal to the receiving process.
77	ESRCH	No process can be found that matches the pid argument.
105	ENOCONTEXT	No thread context is present.