plan9 man page for postnote

POSTNOTE(2)							System Calls Manual						       POSTNOTE(2)

NAME
       postnote - send a note to a process or process group

SYNOPSIS
       #include <u.h>
       #include <libc.h>

       int  postnote(int who, int pid, char *note)

DESCRIPTION
       Postnote  sends	a  note  to a process or process group.  If who is PNPROC, then note is written to /proc/pid/note.  If who is PNGROUP, the
       note is delivered to the process group by writing note to /proc/pid/notepg.  For PNGROUP only, if the calling  process  is  in  the  target
       group, the note is not delivered to that process.

       If the write is successful, zero is returned.  Otherwise -1 is returned.

SOURCE
       /sys/src/libc/9sys/postnote.c

SEE ALSO
       notify(2), intro(2), proc(3)

DIAGNOSTICS
       Sets errstr.

																       POSTNOTE(2)