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 NAME     
 |  |  |  | postnote – send a note to a process or process group 
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 SYNOPSIS     
 |  |  |  | #include <u.h> #include <libc.h> 
    
    
    int    postnote(int who, int pid, char *note)
 
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 DESCRIPTION     
 |  |  |  | Postnote sends a note to a process or process group. If who is
    PNPROC, then note is sent to the process with id pid. If who is
    PNGROUP, the note is delivered to the process group containing
    the process with id pid. For PNGROUP only, if the calling process
    is in the target group, the note is not delivered to that process.
    
    
    
    Returns zero if the write succeeds, otherwise –1. 
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 DIAGNOSTICS     
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