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.
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